Merge tag 'asm-generic-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
"The asm-generic tree contains three separate changes for linux-5.19:

- The h8300 architecture is retired after it has been effectively
unmaintained for a number of years. This is the last architecture
we supported that has no MMU implementation, but there are still a
few architectures (arm, m68k, riscv, sh and xtensa) that support
CPUs with and without an MMU.

- A series to add a generic ticket spinlock that can be shared by
most architectures with a working cmpxchg or ll/sc type atomic,
including the conversion of riscv, csky and openrisc. This series
is also a prerequisite for the loongarch64 architecture port that
will come as a separate pull request.

- A cleanup of some exported uapi header files to ensure they can be
included from user space without relying on other kernel headers"

* tag 'asm-generic-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
h8300: remove stale bindings and symlink
sparc: add asm/stat.h to UAPI compile-test coverage
powerpc: add asm/stat.h to UAPI compile-test coverage
mips: add asm/stat.h to UAPI compile-test coverage
riscv: add linux/bpf_perf_event.h to UAPI compile-test coverage
kbuild: prevent exported headers from including <stdlib.h>, <stdbool.h>
agpgart.h: do not include <stdlib.h> from exported header
csky: Move to generic ticket-spinlock
RISC-V: Move to queued RW locks
RISC-V: Move to generic spinlocks
openrisc: Move to ticket-spinlock
asm-generic: qrwlock: Document the spinlock fairness requirements
asm-generic: qspinlock: Indicate the use of mixed-size atomics
asm-generic: ticket-lock: New generic ticket-based spinlock
remove the h8300 architecture

Documentation/devicetree/bindings/clock/renesas,h8300-div-clock.txt

···
-* Renesas H8/300 divider clock
-
-Required Properties:
-
-  - compatible: Must be "renesas,h8300-div-clock"
-
-  - clocks: Reference to the parent clocks ("extal1" and "extal2")
-
-  - #clock-cells: Must be 1
-
-  - reg: Base address and length of the divide rate selector
-
-  - renesas,width: bit width of selector
-
-Example
--------
-
-		cclk: cclk {
-			compatible = "renesas,h8300-div-clock";
-			clocks = <&xclk>;
-			#clock-cells = <0>;
-			reg = <0xfee01b 2>;
-			renesas,width = <2>;
-		};

Documentation/devicetree/bindings/clock/renesas,h8s2678-pll-clock.txt

···
-Renesas H8S2678 PLL clock
-
-This device is Clock multiplyer
-
-Required Properties:
-
-  - compatible: Must be "renesas,h8s2678-pll-clock"
-
-  - clocks: Reference to the parent clocks
-
-  - #clock-cells: Must be 0
-
-  - reg: Two rate selector (Multiply / Divide) register address
-
-Example
--------
-
-		pllclk: pllclk {
-			compatible = "renesas,h8s2678-pll-clock";
-			clocks = <&xclk>;
-			#clock-cells = <0>;
-			reg = <0xfee03b 2>, <0xfee045 2>;
-		};

Documentation/devicetree/bindings/h8300/cpu.txt

···
-* H8/300 CPU bindings
-
-Required properties:
-
-- compatible: Compatible property value should be "renesas,h8300".
-- clock-frequency: Contains the clock frequency for CPU, in Hz.
-
-Example:
-
-		cpu@0 {
-			compatible = "renesas,h8300";
-			clock-frequency = <20000000>;
-		};

Documentation/devicetree/bindings/interrupt-controller/renesas,h8300h-intc.txt

···
-* H8/300H Interrupt controller
-
-Required properties:
-
-- compatible: has to be "renesas,h8300h-intc", "renesas,h8300-intc" as fallback.
-- #interrupt-cells: has to be <2>: an interrupt index and flags, as defined in
-  interrupts.txt in this directory
-- regs: Base address of interrupt controller registers.
-
-Optional properties:
-
-- any properties, listed in interrupts.txt, and any standard resource allocation
-  properties
-
-Example:
-
-	h8intc: interrupt-controller@fee012 {
-		compatible = "renesas,h8300h-intc", "renesas,h8300-intc";
-		#interrupt-cells = <2>;
-		interrupt-controller;
-		reg = <0xfee012 7>;
-	};

Documentation/devicetree/bindings/interrupt-controller/renesas,h8s-intc.txt

···
-* H8S Interrupt controller
-
-Required properties:
-
-- compatible: has to be "renesas,h8s-intc", "renesas,h8300-intc" as fallback.
-- #interrupt-cells: has to be <2>: an interrupt index and flags, as defined in
-  interrupts.txt in this directory
-- regs: Base address of interrupt controller registers.
-
-Optional properties:
-
-- any properties, listed in interrupts.txt, and any standard resource allocation
-  properties
-
-Example:
-
-	h8intc: interrupt-controller@fffe00 {
-		compatible = "renesas,h8s-intc", "renesas,h8300-intc";
-		#interrupt-cells = <2>;
-		interrupt-controller;
-		reg = <0xfffe00 24>;
-	};

Documentation/devicetree/bindings/memory-controllers/renesas,h8300-bsc.yaml

···
-# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/memory-controllers/renesas,h8300-bsc.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: H8/300 bus controller
-
-maintainers:
-  - Krzysztof Kozlowski <[e-mail]>
-  - Yoshinori Sato <[e-mail]>
-
-properties:
-  compatible:
-    items:
-      - enum:
-          - renesas,h8300h-bsc
-          - renesas,h8s-bsc
-      - const: renesas,h8300-bsc
-
-  reg:
-    maxItems: 1
-
-required:
-  - compatible
-  - reg
-
-additionalProperties: false
-
-examples:
-  - |
-    memory-controller@fee01e {
-        compatible = "renesas,h8300h-bsc", "renesas,h8300-bsc";
-        reg = <0xfee01e 8>;
-    };

Documentation/devicetree/bindings/timer/renesas,16bit-timer.txt

···
-* Renesas H8/300 16bit timer
-
-The 16bit timer is a 16bit timer/counter with configurable clock inputs and
-programmable compare match.
-
-Required Properties:
-
-  - compatible: must contain "renesas,16bit-timer"
-  - reg: base address and length of the registers block for the timer module.
-  - interrupts: interrupt-specifier for the timer, IMIA
-  - clocks: a list of phandle, one for each entry in clock-names.
-  - clock-names: must contain "peripheral_clk" for the functional clock.
-  - renesas,channel: timer channel number.
-
-Example:
-
-	timer16: timer@ffff68 {
-		compatible = "reneas,16bit-timer";
-		reg = <0xffff68 8>, <0xffff60 8>;
-		interrupts = <24>;
-		renesas,channel = <0>;
-		clocks = <&pclk>;
-		clock-names = "peripheral_clk";
-	};
-

Documentation/devicetree/bindings/timer/renesas,8bit-timer.txt

···
-* Renesas H8/300 8bit timer
-
-The 8bit timer is a 8bit timer/counter with configurable clock inputs and
-programmable compare match.
-
-This implement only supported cascade mode.
-
-Required Properties:
-
-  - compatible: must contain "renesas,8bit-timer"
-  - reg: base address and length of the registers block for the timer module.
-  - interrupts: interrupt-specifier for the timer, CMIA and TOVI
-  - clocks: a list of phandle, one for each entry in clock-names.
-  - clock-names: must contain "fck" for the functional clock.
-
-Example:
-
-	timer8_0: timer@ffff80 {
-		compatible = "renesas,8bit-timer";
-		reg = <0xffff80 10>;
-		interrupts = <36>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-

Documentation/features/core/cBPF-JIT/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: | TODO |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/core/eBPF-JIT/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/core/generic-idle-thread/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: |  ok  |
     |        m68k: | TODO |

Documentation/features/core/jump-labels/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/core/thread-info-in-task/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/core/tracehook/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: |  ok  |
     |        m68k: | TODO |

Documentation/features/debug/KASAN/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/debug-vm-pgtable/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/gcov-profile-all/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/kcov/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/kgdb/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: |  ok  |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/kmemleak/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/kprobes-on-ftrace/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: | TODO |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/kprobes/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
     |        m68k: | TODO |

Documentation/features/debug/kretprobes/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
     |        m68k: | TODO |

Documentation/features/debug/optprobes/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: | TODO |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/stackprotector/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/uprobes/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/debug/user-ret-profiler/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: | TODO |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/io/dma-contiguous/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/locking/cmpxchg-local/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/locking/lockdep/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/locking/queued-rwlocks/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/locking/queued-spinlocks/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/perf/kprobes-event/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/perf/perf-regs/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/perf/perf-stackdump/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/sched/membarrier-sync-core/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/sched/numa-balancing/arch-support.txt

···
     |         arm: |  ..  |
     |       arm64: |  ok  |
     |        csky: |  ..  |
-    |       h8300: |  ..  |
     |     hexagon: |  ..  |
     |        ia64: | TODO |
     |        m68k: |  ..  |

Documentation/features/seccomp/seccomp-filter/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/time/arch-tick-broadcast/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/time/clockevents/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: |  ok  |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/time/context-tracking/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/time/irq-time-acct/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ..  |
     |        m68k: | TODO |

Documentation/features/time/virt-cpuacct/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ok  |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
     |        m68k: | TODO |

Documentation/features/vm/ELF-ASLR/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/vm/PG_uncached/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: | TODO |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: |  ok  |
     |        m68k: | TODO |

Documentation/features/vm/THP/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: |  ..  |
-    |       h8300: |  ..  |
     |     hexagon: |  ..  |
     |        ia64: | TODO |
     |        m68k: |  ..  |

Documentation/features/vm/TLB/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: | N/A  |
     |        csky: | TODO |
-    |       h8300: |  ..  |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: |  ..  |

Documentation/features/vm/huge-vmap/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/vm/ioremap_prot/arch-support.txt

···
     |         arm: | TODO |
     |       arm64: | TODO |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

Documentation/features/vm/pte_special/arch-support.txt

···
     |         arm: |  ok  |
     |       arm64: |  ok  |
     |        csky: | TODO |
-    |       h8300: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |        m68k: | TODO |

MAINTAINERS

···
 S:	Maintained
 F:	block/partitions/efi.*
 
-H8/300 ARCHITECTURE
-M:	Yoshinori Sato <[e-mail]>
-L:	[e-mail] (moderated for non-subscribers)
-S:	Maintained
-W:	http://uclinux-h8.sourceforge.jp
-T:	git git://git.sourceforge.jp/gitroot/uclinux-h8/linux.git
-F:	arch/h8300/
-F:	drivers/clk/h8300/
-F:	drivers/clocksource/h8300_*.c
-F:	drivers/irqchip/irq-renesas-h8*.c
-
 HABANALABS PCI DRIVER
 M:	Oded Gabbay <[e-mail]>
 S:	Supported

arch/csky/include/asm/Kbuild

···
 generic-y += extable.h
 generic-y += gpio.h
 generic-y += kvm_para.h
+generic-y += spinlock.h
+generic-y += spinlock_types.h
 generic-y += qrwlock.h
+generic-y += qrwlock_types.h
 generic-y += parport.h
 generic-y += user.h
 generic-y += vmlinux.lds.h

arch/csky/include/asm/spinlock.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#ifndef __ASM_CSKY_SPINLOCK_H
-#define __ASM_CSKY_SPINLOCK_H
-
-#include <linux/spinlock_types.h>
-#include <asm/barrier.h>
-
-/*
- * Ticket-based spin-locking.
- */
-static inline void arch_spin_lock(arch_spinlock_t *lock)
-{
-	arch_spinlock_t lockval;
-	u32 ticket_next = 1 << TICKET_NEXT;
-	u32 *p = &lock->lock;
-	u32 tmp;
-
-	asm volatile (
-		"1:	ldex.w		%0, (%2) \n"
-		"	mov		%1, %0	 \n"
-		"	add		%0, %3	 \n"
-		"	stex.w		%0, (%2) \n"
-		"	bez		%0, 1b   \n"
-		: "=&r" (tmp), "=&r" (lockval)
-		: "r"(p), "r"(ticket_next)
-		: "cc");
-
-	while (lockval.tickets.next != lockval.tickets.owner)
-		lockval.tickets.owner = READ_ONCE(lock->tickets.owner);
-
-	smp_mb();
-}
-
-static inline int arch_spin_trylock(arch_spinlock_t *lock)
-{
-	u32 tmp, contended, res;
-	u32 ticket_next = 1 << TICKET_NEXT;
-	u32 *p = &lock->lock;
-
-	do {
-		asm volatile (
-		"	ldex.w		%0, (%3)   \n"
-		"	movi		%2, 1	   \n"
-		"	rotli		%1, %0, 16 \n"
-		"	cmpne		%1, %0     \n"
-		"	bt		1f         \n"
-		"	movi		%2, 0	   \n"
-		"	add		%0, %0, %4 \n"
-		"	stex.w		%0, (%3)   \n"
-		"1:				   \n"
-		: "=&r" (res), "=&r" (tmp), "=&r" (contended)
-		: "r"(p), "r"(ticket_next)
-		: "cc");
-	} while (!res);
-
-	if (!contended)
-		smp_mb();
-
-	return !contended;
-}
-
-static inline void arch_spin_unlock(arch_spinlock_t *lock)
-{
-	smp_mb();
-	WRITE_ONCE(lock->tickets.owner, lock->tickets.owner + 1);
-}
-
-static inline int arch_spin_value_unlocked(arch_spinlock_t lock)
-{
-	return lock.tickets.owner == lock.tickets.next;
-}
-
-static inline int arch_spin_is_locked(arch_spinlock_t *lock)
-{
-	return !arch_spin_value_unlocked(READ_ONCE(*lock));
-}
-
-static inline int arch_spin_is_contended(arch_spinlock_t *lock)
-{
-	struct __raw_tickets tickets = READ_ONCE(lock->tickets);
-
-	return (tickets.next - tickets.owner) > 1;
-}
-#define arch_spin_is_contended	arch_spin_is_contended
-
-#include <asm/qrwlock.h>
-
-#endif /* __ASM_CSKY_SPINLOCK_H */

arch/csky/include/asm/spinlock_types.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#ifndef __ASM_CSKY_SPINLOCK_TYPES_H
-#define __ASM_CSKY_SPINLOCK_TYPES_H
-
-#ifndef __LINUX_SPINLOCK_TYPES_RAW_H
-# error "please don't include this file directly"
-#endif
-
-#define TICKET_NEXT	16
-
-typedef struct {
-	union {
-		u32 lock;
-		struct __raw_tickets {
-			/* little endian */
-			u16 owner;
-			u16 next;
-		} tickets;
-	};
-} arch_spinlock_t;
-
-#define __ARCH_SPIN_LOCK_UNLOCKED	{ { 0 } }
-
-#include <asm-generic/qrwlock_types.h>
-
-#endif /* __ASM_CSKY_SPINLOCK_TYPES_H */

arch/h8300/Kbuild

···
-# SPDX-License-Identifier: GPL-2.0-only
-obj-y	+= kernel/ mm/ boot/dts/
-
-# for cleaning
-subdir- += boot

arch/h8300/Kconfig

···
-# SPDX-License-Identifier: GPL-2.0
-config H8300
-        def_bool y
-	select ARCH_32BIT_OFF_T
-	select ARCH_HAS_BINFMT_FLAT
-	select BINFMT_FLAT_ARGVP_ENVP_ON_STACK
-	select BINFMT_FLAT_OLD_ALWAYS_RAM
-	select GENERIC_ATOMIC64
-	select HAVE_UID16
-	select VIRT_TO_BUS
-	select GENERIC_IRQ_SHOW
-	select FRAME_POINTER
-	select GENERIC_CPU_DEVICES
-	select MODULES_USE_ELF_RELA
-	select COMMON_CLK
-	select ARCH_WANT_FRAME_POINTERS
-	select OF
-	select OF_IRQ
-	select OF_EARLY_FLATTREE
-	select TIMER_OF
-	select H8300_TMR8
-	select HAVE_KERNEL_GZIP
-	select HAVE_KERNEL_LZO
-	select HAVE_ARCH_KGDB
-	select HAVE_ARCH_HASH
-	select CPU_NO_EFFICIENT_FFS
-	select UACCESS_MEMCPY
-
-config CPU_BIG_ENDIAN
-	def_bool y
-
-config GENERIC_HWEIGHT
-	def_bool y
-
-config NO_IOPORT_MAP
-	def_bool y
-
-config GENERIC_CSUM
-        def_bool y
-
-config HZ
-	int
-	default 100
-
-config NR_CPUS
-	int
-	default 1
-
-source "arch/h8300/Kconfig.cpu"

arch/h8300/Kconfig.cpu

···
-# SPDX-License-Identifier: GPL-2.0
-config CPU_H8300H
-	bool
-
-config CPU_H8S
-	bool
-
-config H83069
-	bool
-	select CPU_H8300H
-	select H8300_TMR16
-	select RENESAS_H8300H_INTC
-
-config H8S2678
-	bool
-	select CPU_H8S
-	select H8300_TPU
-	select RENESAS_H8S_INTC
-
-config RAMKERNEL
-	bool
-
-config ROMKERNEL
-	bool
-
-menu "Processor type and features"
-
-choice
-prompt "H8/300 platform"
-
-config H8300_AE3068
-	bool "AE-3068/69"
-	select H83069
-	select RAMKERNEL
-	help
-	  AKI-H8/3068F / AKI-H8/3069F Flashmicom LAN Board Support
-	  More Information. (Japanese Only)
-	  <http://akizukidenshi.com/catalog/default.aspx>
-	  AE-3068/69 Evaluation Board Support
-	  More Information.
-	  <http://www.microtronique.com/ae3069lan.htm>
-
-config H8300_H8MAX
-	bool "H8MAX"
-	select H83069
-	select RAMKERNEL
-	help
-	  H8MAX Evaluation Board Support
-	  More Information. (Japanese Only)
-	  <http://strawberry-linux.com/h8/index.html>
-
-config H8300_KANEBEBE
-	bool "KaneBebe"
-	select H83069
-	select RAMKERNEL
-	help
-	  KaneBebe Evalition Board Support
-	  More Information. (Japanese Only)
-	  <http://www.nissin-tech.com/2009/10/uclinuxkane-bebe-h83069f.html>
-
-config H8300H_SIM
-	bool "H8/300H GDB Simulator"
-	select H83069
-	select ROMKERNEL
-	help
-	  GDB Simulator Support
-	  More Information.
-	  <http://sourceware.org/sid/>
-
-config H8S_EDOSK2674
-	bool "EDOSK-2674"
-	select H8S2678
-	select RAMKERNEL
-	help
-	  Renesas EDOSK-2674 Evaluation Board Support
-	  More Information.
-	  <http://www.azpower.com/H8-uClinux/index.html>
-	  <http://www.renesas.eu/products/tools/introductory_evaluation_tools/evaluation_development_os_kits/edosk2674r/edosk2674r_software_tools_root.jsp>
-
-config H8S_SIM
-	bool "H8S GDB Simulator"
-	select H8S2678
-	select ROMKERNEL
-	help
-	  GDB Simulator Support
-	  More Information.
-	  <http://sourceware.org/sid/>
-
-endchoice
-
-config H8300_BUILTIN_DTB
-        string "Builtin DTB"
-	default ""
-
-config OFFSET
-        hex "Load offset"
-	default 0
-
-endmenu

arch/h8300/Kconfig.debug

···
-# SPDX-License-Identifier: GPL-2.0-only
-# dummy file, do not delete

arch/h8300/Makefile

···
-#
-# arch/h8300/Makefile
-#
-# This file is subject to the terms and conditions of the GNU General Public
-# License.  See the file "COPYING" in the main directory of this archive
-# for more details.
-#
-# (C) Copyright 2002-2015 Yoshinori Sato <[e-mail]>
-#
-
-KBUILD_DEFCONFIG := edosk2674_defconfig
-
-cflags-$(CONFIG_CPU_H8300H)	:= -mh
-aflags-$(CONFIG_CPU_H8300H)	:= -mh -Wa,--mach=h8300h
-ldflags-$(CONFIG_CPU_H8300H)	:= -mh8300helf_linux
-cflags-$(CONFIG_CPU_H8S)	:= -ms
-aflags-$(CONFIG_CPU_H8S)	:= -ms -Wa,--mach=h8300s
-ldflags-$(CONFIG_CPU_H8S)	:= -mh8300self_linux
-
-KBUILD_CFLAGS += $(cflags-y)
-KBUILD_CFLAGS += -mint32 -fno-builtin
-KBUILD_CFLAGS += -D__linux__
-KBUILD_CFLAGS += -DUTS_SYSNAME=\"uClinux\"
-KBUILD_AFLAGS += $(aflags-y)
-KBUILD_LDFLAGS += $(ldflags-y)
-
-CHECKFLAGS += -msize-long
-
-ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := $(call cc-cross-prefix, h8300-unknown-linux- h8300-linux-)
-endif
-
-libs-y	+= arch/$(ARCH)/lib/
-
-boot := arch/h8300/boot
-
-vmlinux.srec vmlinux.bin zImage uImage.bin: vmlinux
-	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
-
-define archhelp
-  @echo  'vmlinux.bin  - Create raw binary'
-  @echo  'vmlinux.srec - Create srec binary'
-  @echo  'zImage       - Compressed kernel image'
-endef

arch/h8300/boot/Makefile

···
-# SPDX-License-Identifier: GPL-2.0
-# arch/h8300/boot/Makefile
-
-targets := vmlinux.srec vmlinux.bin zImage
-subdir- := compressed
-
-OBJCOPYFLAGS_vmlinux.srec := -Osrec
-OBJCOPYFLAGS_vmlinux.bin  := -Obinary
-OBJCOPYFLAGS_zImage := -O binary -R .note -R .comment -R .stab -R .stabstr -S
-
-UIMAGE_LOADADDR = $(CONFIG_RAMBASE)
-UIMAGE_ENTRYADDR = $(shell /bin/bash -c 'printf "0x%08x" \
-	$$[$(CONFIG_RAMBASE) + $(CONFIG_OFFSET)]')
-
-$(obj)/vmlinux.srec $(obj)/vmlinux.bin:  vmlinux FORCE
-	$(call if_changed,objcopy)
-
-$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
-	$(call if_changed,objcopy)
-
-$(obj)/compressed/vmlinux: FORCE
-	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
-
-$(obj)/uImage.bin: $(obj)/vmlinux.bin
-	$(call if_changed,uimage,none)
-
-CLEAN_FILES += arch/$(ARCH)/vmlinux.bin arch/$(ARCH)/vmlinux.srec arch/$(ARCH)/uImage.bin

arch/h8300/boot/compressed/Makefile

···
-# SPDX-License-Identifier: GPL-2.0
-#
-# linux/arch/sh/boot/compressed/Makefile
-#
-# create a compressed vmlinux image from the original vmlinux
-#
-
-targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
-
-OBJECTS = $(obj)/head.o $(obj)/misc.o
-
-#
-# IMAGE_OFFSET is the load offset of the compression loader
-# Assign dummy values if these 2 variables are not defined,
-# in order to suppress error message.
-#
-CONFIG_MEMORY_START     ?= 0x00400000
-CONFIG_BOOT_LINK_OFFSET ?= 0x00280000
-IMAGE_OFFSET := $(shell printf "0x%08x" $$(($(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET))))
-
-LIBGCC := $(shell $(CROSS-COMPILE)$(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name 2>/dev/null)
-LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -estartup -T $(obj)/vmlinux.lds \
-	--defsym output=$(CONFIG_MEMORY_START)
-
-$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
-	$(call if_changed,ld)
-
-$(obj)/vmlinux.bin: vmlinux FORCE
-	$(call if_changed,objcopy)
-
-suffix-$(CONFIG_KERNEL_GZIP)    := gzip
-suffix-$(CONFIG_KERNEL_LZO)     := lzo
-compress-$(CONFIG_KERNEL_GZIP)  := gzip
-compress-$(CONFIG_KERNEL_LZO)   := lzo_with_size
-
-$(obj)/vmlinux.bin.$(suffix-y): $(obj)/vmlinux.bin FORCE
-	$(call if_changed,$(compress-y))
-
-LDFLAGS_piggy.o := -r --format binary --oformat elf32-h8300-linux -T
-OBJCOPYFLAGS := -O binary
-
-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y) FORCE
-	$(call if_changed,ld)
-
-CFLAGS_misc.o = -O0

arch/h8300/boot/compressed/head.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- *  linux/arch/h8300/boot/compressed/head.S
- *
- *  Copyright (C) 2006 Yoshinori Sato
- */
-
-#include <linux/linkage.h>
-
-	.section	.text..startup,"ax"
-	.global	startup
-startup:
-	mov.l	#startup, sp
-	mov.l	er0, er4
-	mov.l	#__sbss, er0
-	mov.l	#__ebss, er1
-	sub.l	er0, er1
-	shlr	er1
-	shlr	er1
-	sub.l	er2, er2
-1:
-	mov.l	er2, @er0
-	adds	#4, er0
-	dec.l	#1, er1
-	bne	1b
-	jsr	@decompress_kernel
-	mov.l	er4, er0
-	jmp	@output
-
-	.align	9
-fake_headers_as_bzImage:
-	.word	0
-	.ascii	"HdrS"		; header signature
-	.word	0x0202		; header version number (>= 0x0105)
-				; or else old loadlin-1.5 will fail)
-	.word	0		; default_switch
-	.word	0		; SETUPSEG
-	.word	0x1000
-	.word	0		; pointing to kernel version string
-	.byte	0		; = 0, old one (LILO, Loadlin,
-				; 0xTV: T=0 for LILO
-				;       V = version
-	.byte	1		; Load flags bzImage=1
-	.word	0x8000		; size to move, when setup is not
-	.long	0x100000	; 0x100000 = default for big kernel
-	.long	0		; address of loaded ramdisk image
-	.long	0		; its size in bytes
-
-	.end

arch/h8300/boot/compressed/misc.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * arch/h8300/boot/compressed/misc.c
- *
- * This is a collection of several routines from gzip-1.0.3
- * adapted for Linux.
- *
- * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
- *
- * Adapted for h8300 by Yoshinori Sato 2006
- */
-
-#include <linux/uaccess.h>
-
-/*
- * gzip declarations
- */
-
-#define OF(args)  args
-#define STATIC static
-
-#undef memset
-#undef memcpy
-#define memzero(s, n)     memset((s), (0), (n))
-
-extern int _end;
-static unsigned long free_mem_ptr;
-static unsigned long free_mem_end_ptr;
-
-extern char input_data[];
-extern int input_len;
-extern char output[];
-
-#define HEAP_SIZE             0x10000
-
-#ifdef CONFIG_KERNEL_GZIP
-#include "../../../../lib/decompress_inflate.c"
-#endif
-
-#ifdef CONFIG_KERNEL_LZO
-#include "../../../../lib/decompress_unlzo.c"
-#endif
-
-void *memset(void *s, int c, size_t n)
-{
-	int i;
-	char *ss = (char *)s;
-
-	for (i = 0; i < n; i++)
-		ss[i] = c;
-	return s;
-}
-
-void *memcpy(void *dest, const void *src, size_t n)
-{
-	int i;
-	char *d = (char *)dest, *s = (char *)src;
-
-	for (i = 0; i < n; i++)
-		d[i] = s[i];
-	return dest;
-}
-
-static void error(char *x)
-{
-	while (1)
-		;	/* Halt */
-}
-
-void decompress_kernel(void)
-{
-	free_mem_ptr = (unsigned long)&_end;
-	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
-
-	__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
-}

arch/h8300/boot/compressed/vmlinux.lds

···
-/* SPDX-License-Identifier: GPL-2.0 */
-SECTIONS
-{
-        .text :
-        {
-        __stext = . ;
-	__text = .;
-	       *(.text..startup)
-	       *(.text)
-        __etext = . ;
-        }
-
-	.rodata :
-	{
-		*(.rodata)
-	}
-        . = ALIGN(0x4) ;
-        .data :
-
-        {
-        . = ALIGN(0x4) ;
-        __sdata = . ;
-        ___data_start = . ;
-                *(.data.*)
-	}
-        . = ALIGN(0x4) ;
-        .bss :
-        {
-        __sbss = . ;
-                *(.bss*)
-        . = ALIGN(0x4) ;
-        __ebss = . ;
-        }
-        _end = . ;
-}

arch/h8300/boot/compressed/vmlinux.scr

···
-SECTIONS
-{
-  .data : {
-	input_len = .;
-	LONG(input_data_end - input_data) input_data = .;
-	*(.data)
-	input_data_end = .;
-	}
-}

arch/h8300/boot/dts/Makefile

···
-# SPDX-License-Identifier: GPL-2.0
-obj-y += $(addsuffix .dtb.o, $(CONFIG_H8300_BUILTIN_DTB))
-
-dtb-$(CONFIG_H8300H_SIM) := h8300h_sim.dtb
-dtb-$(CONFIG_H8S_SIM) := h8s_sim.dtb
-dtb-$(CONFIG_H8S_EDOSK2674) := edosk2674.dtb

arch/h8300/boot/dts/edosk2674.dts

···
-// SPDX-License-Identifier: GPL-2.0
-/dts-v1/;
-/ {
-	compatible = "renesas,edosk2674";
-	#address-cells = <1>;
-	#size-cells = <1>;
-	interrupt-parent = <&h8intc>;
-
-	chosen {
-		bootargs = "console=ttySC2,38400";
-		stdout-path = &sci2;
-	};
-	aliases {
-		serial0 = &sci0;
-		serial1 = &sci1;
-		serial2 = &sci2;
-	};
-
-	xclk: oscillator {
-		#clock-cells = <0>;
-		compatible = "fixed-clock";
-		clock-frequency = <33333333>;
-		clock-output-names = "xtal";
-	};
-	pllclk: pllclk {
-		compatible = "renesas,h8s2678-pll-clock";
-		clocks = <&xclk>;
-		#clock-cells = <0>;
-		reg = <0xffff3b 1>, <0xffff45 1>;
-	};
-	core_clk: core_clk {
-		compatible = "renesas,h8300-div-clock";
-		clocks = <&pllclk>;
-		#clock-cells = <0>;
-		reg = <0xffff3b 1>;
-		renesas,width = <3>;
-	};
-	fclk: fclk {
-		compatible = "fixed-factor-clock";
-		clocks = <&core_clk>;
-		#clock-cells = <0>;
-		clock-div = <1>;
-		clock-mult = <1>;
-	};
-
-	memory@400000 {
-		device_type = "memory";
-		reg = <0x400000 0x800000>;
-	};
-
-	cpus {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		cpu@0 {
-			compatible = "renesas,h8300";
-			clock-frequency = <33333333>;
-		};
-	};
-
-	h8intc: interrupt-controller@fffe00 {
-		compatible = "renesas,h8s-intc", "renesas,h8300-intc";
-		#interrupt-cells = <2>;
-		interrupt-controller;
-		reg = <0xfffe00 24>;
-	};
-
-	bsc: memory-controller@fffec0 {
-		compatible = "renesas,h8s-bsc", "renesas,h8300-bsc";
-		reg = <0xfffec0 24>;
-	};
-
-	tpu: timer@ffffe0 {
-		compatible = "renesas,tpu";
-		reg = <0xffffe0 16>, <0xfffff0 12>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	timer8: timer@ffffb0 {
-		compatible = "renesas,8bit-timer";
-		reg = <0xffffb0 10>;
-		interrupts = <72 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	sci0: serial@ffff78 {
-		compatible = "renesas,sci";
-		reg = <0xffff78 8>;
-		interrupts = <88 0>, <89 0>, <90 0>, <91 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-	sci1: serial@ffff80 {
-		compatible = "renesas,sci";
-		reg = <0xffff80 8>;
-		interrupts = <92 0>, <93 0>, <94 0>, <95 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-	sci2: serial@ffff88 {
-		compatible = "renesas,sci";
-		reg = <0xffff88 8>;
-		interrupts = <96 0>, <97 0>, <98 0>, <99 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-};

arch/h8300/boot/dts/h8300h_sim.dts

···
-// SPDX-License-Identifier: GPL-2.0
-/dts-v1/;
-/ {
-	compatible = "gnu,gdbsim";
-	#address-cells = <1>;
-	#size-cells = <1>;
-	interrupt-parent = <&h8intc>;
-
-	chosen {
-		bootargs = "earlyprintk=h8300-sim";
-		stdout-path = <&sci0>;
-	};
-	aliases {
-		serial0 = &sci0;
-		serial1 = &sci1;
-	};
-
-	xclk: oscillator {
-		#clock-cells = <0>;
-		compatible = "fixed-clock";
-		clock-frequency = <20000000>;
-		clock-output-names = "xtal";
-	};
-	core_clk: core_clk {
-		compatible = "renesas,h8300-div-clock";
-		clocks = <&xclk>;
-		#clock-cells = <0>;
-		reg = <0xfee01b 2>;
-		renesas,width = <2>;
-	};
-	fclk: fclk {
-		compatible = "fixed-factor-clock";
-		clocks = <&core_clk>;
-		#clock-cells = <0>;
-		clock-div = <1>;
-		clock-mult = <1>;
-	};
-
-	memory@400000 {
-		device_type = "memory";
-		reg = <0x400000 0x400000>;
-	};
-
-	cpus {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		cpu@0 {
-			compatible = "renesas,h8300";
-			clock-frequency = <20000000>;
-		};
-	};
-
-	h8intc: interrupt-controller@fee012 {
-		compatible = "renesas,h8300h-intc", "renesas,h8300-intc";
-		#interrupt-cells = <2>;
-		interrupt-controller;
-		reg = <0xfee012 7>;
-	};
-
-	bsc: memory-controller@fee01e {
-		compatible = "renesas,h8300h-bsc", "renesas,h8300-bsc";
-		reg = <0xfee01e 8>;
-	};
-
-	timer8: timer@ffff80 {
-		compatible = "renesas,8bit-timer";
-		reg = <0xffff80 10>;
-		interrupts = <36 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	timer16: timer@ffff68 {
-		compatible = "renesas,16bit-timer";
-		reg = <0xffff68 8>, <0xffff60 8>;
-		interrupts = <26 0>;
-		renesas,channel = <0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	sci0: serial@ffffb0 {
-		compatible = "renesas,sci";
-		reg = <0xffffb0 8>;
-		interrupts = <52 0>, <53 0>, <54 0>, <55 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	sci1: serial@ffffb8 {
-		compatible = "renesas,sci";
-		reg = <0xffffb8 8>;
-		interrupts = <56 0>, <57 0>, <58 0>, <59 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-};

arch/h8300/boot/dts/h8s_sim.dts

···
-// SPDX-License-Identifier: GPL-2.0
-/dts-v1/;
-/ {
-	compatible = "gnu,gdbsim";
-	#address-cells = <1>;
-	#size-cells = <1>;
-	interrupt-parent = <&h8intc>;
-
-	chosen {
-		bootargs = "earlyprintk=h8300-sim";
-		stdout-path = <&sci0>;
-	};
-	aliases {
-		serial0 = &sci0;
-		serial1 = &sci1;
-	};
-
-	xclk: oscillator {
-		#clock-cells = <0>;
-		compatible = "fixed-clock";
-		clock-frequency = <33333333>;
-		clock-output-names = "xtal";
-	};
-	pllclk: pllclk {
-		compatible = "renesas,h8s2678-pll-clock";
-		clocks = <&xclk>;
-		#clock-cells = <0>;
-		reg = <0xfee03b 2>, <0xfee045 2>;
-	};
-	core_clk: core_clk {
-		compatible = "renesas,h8300-div-clock";
-		clocks = <&pllclk>;
-		#clock-cells = <0>;
-		reg = <0xfee03b 2>;
-		renesas,width = <3>;
-	};
-	fclk: fclk {
-		compatible = "fixed-factor-clock";
-		clocks = <&core_clk>;
-		#clock-cells = <0>;
-		clock-div = <1>;
-		clock-mult = <1>;
-	};
-
-	memory@400000 {
-		device_type = "memory";
-		reg = <0x400000 0x800000>;
-	};
-
-	cpus {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		cpu@0 {
-			compatible = "renesas,h8300";
-			clock-frequency = <33333333>;
-		};
-	};
-
-	h8intc: interrupt-controller@fffe00 {
-		compatible = "renesas,h8s-intc", "renesas,h8300-intc";
-		#interrupt-cells = <2>;
-		interrupt-controller;
-		reg = <0xfffe00 24>;
-	};
-
-	bsc: memory-controller@fffec0 {
-		compatible = "renesas,h8s-bsc", "renesas,h8300-bsc";
-		reg = <0xfffec0 24>;
-	};
-
-	tpu: timer@ffffe0 {
-		compatible = "renesas,tpu";
-		reg = <0xffffe0 16>, <0xfffff0 12>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	timer8: timer@ffffb0 {
-		compatible = "renesas,8bit-timer";
-		reg = <0xffffb0 10>;
-		interrupts = <72 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-
-	sci0: serial@ffff78 {
-		compatible = "renesas,sci";
-		reg = <0xffff78 8>;
-		interrupts = <88 0>, <89 0>, <90 0>, <91 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-	sci1: serial@ffff80 {
-		compatible = "renesas,sci";
-		reg = <0xffff80 8>;
-		interrupts = <92 0>, <93 0>, <94 0>, <95 0>;
-		clocks = <&fclk>;
-		clock-names = "fck";
-	};
-};

arch/h8300/configs/edosk2674_defconfig

···
-# CONFIG_LOCALVERSION_AUTO is not set
-# CONFIG_USELIB is not set
-CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-# CONFIG_UID16 is not set
-# CONFIG_SYSFS_SYSCALL is not set
-# CONFIG_KALLSYMS is not set
-# CONFIG_BASE_FULL is not set
-# CONFIG_FUTEX is not set
-# CONFIG_EPOLL is not set
-# CONFIG_SIGNALFD is not set
-# CONFIG_TIMERFD is not set
-# CONFIG_EVENTFD is not set
-# CONFIG_AIO is not set
-# CONFIG_ADVISE_SYSCALLS is not set
-CONFIG_EMBEDDED=y
-# CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_COMPAT_BRK is not set
-CONFIG_SLOB=y
-# CONFIG_BLOCK is not set
-CONFIG_H8S_SIM=y
-CONFIG_H8300_BUILTIN_DTB="h8s_sim"
-# CONFIG_BINFMT_SCRIPT is not set
-CONFIG_BINFMT_FLAT=y
-# CONFIG_COREDUMP is not set
-# CONFIG_UEVENT_HELPER is not set
-# CONFIG_STANDALONE is not set
-# CONFIG_PREVENT_FIRMWARE_BUILD is not set
-# CONFIG_FW_LOADER is not set
-# CONFIG_ALLOW_DEV_COREDUMP is not set
-# CONFIG_INPUT is not set
-# CONFIG_SERIO is not set
-# CONFIG_VT is not set
-# CONFIG_UNIX98_PTYS is not set
-# CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVKMEM is not set
-CONFIG_SERIAL_SH_SCI=y
-CONFIG_SERIAL_SH_SCI_CONSOLE=y
-# CONFIG_HW_RANDOM is not set
-# CONFIG_HWMON is not set
-# CONFIG_USB_SUPPORT is not set
-# CONFIG_FILE_LOCKING is not set
-# CONFIG_DNOTIFY is not set
-# CONFIG_INOTIFY_USER is not set
-# CONFIG_PROC_FS is not set
-# CONFIG_SYSFS is not set
-# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_DEBUG_INFO=y
-# CONFIG_ENABLE_MUST_CHECK is not set

arch/h8300/configs/h8300h-sim_defconfig

···
-# CONFIG_LOCALVERSION_AUTO is not set
-# CONFIG_USELIB is not set
-CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-# CONFIG_UID16 is not set
-# CONFIG_SYSFS_SYSCALL is not set
-# CONFIG_KALLSYMS is not set
-# CONFIG_BASE_FULL is not set
-# CONFIG_FUTEX is not set
-# CONFIG_EPOLL is not set
-# CONFIG_SIGNALFD is not set
-# CONFIG_TIMERFD is not set
-# CONFIG_EVENTFD is not set
-# CONFIG_AIO is not set
-# CONFIG_ADVISE_SYSCALLS is not set
-CONFIG_EMBEDDED=y
-# CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_COMPAT_BRK is not set
-CONFIG_SLOB=y
-# CONFIG_BLOCK is not set
-CONFIG_H8300H_SIM=y
-CONFIG_H8300_BUILTIN_DTB="h8300h_sim"
-# CONFIG_BINFMT_SCRIPT is not set
-CONFIG_BINFMT_FLAT=y
-# CONFIG_COREDUMP is not set
-# CONFIG_UEVENT_HELPER is not set
-# CONFIG_STANDALONE is not set
-# CONFIG_PREVENT_FIRMWARE_BUILD is not set
-# CONFIG_FW_LOADER is not set
-# CONFIG_ALLOW_DEV_COREDUMP is not set
-# CONFIG_INPUT is not set
-# CONFIG_SERIO is not set
-# CONFIG_VT is not set
-# CONFIG_UNIX98_PTYS is not set
-# CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVKMEM is not set
-CONFIG_SERIAL_SH_SCI=y
-CONFIG_SERIAL_SH_SCI_EARLYCON=y
-# CONFIG_HW_RANDOM is not set
-# CONFIG_HWMON is not set
-# CONFIG_USB_SUPPORT is not set
-# CONFIG_FILE_LOCKING is not set
-# CONFIG_DNOTIFY is not set
-# CONFIG_INOTIFY_USER is not set
-# CONFIG_PROC_FS is not set
-# CONFIG_SYSFS is not set
-# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_DEBUG_INFO=y
-# CONFIG_ENABLE_MUST_CHECK is not set

arch/h8300/configs/h8s-sim_defconfig

···
-# CONFIG_LOCALVERSION_AUTO is not set
-# CONFIG_USELIB is not set
-CONFIG_CC_OPTIMIZE_FOR_SIZE=y
-# CONFIG_UID16 is not set
-# CONFIG_SYSFS_SYSCALL is not set
-# CONFIG_KALLSYMS is not set
-# CONFIG_BASE_FULL is not set
-# CONFIG_FUTEX is not set
-# CONFIG_EPOLL is not set
-# CONFIG_SIGNALFD is not set
-# CONFIG_TIMERFD is not set
-# CONFIG_EVENTFD is not set
-# CONFIG_AIO is not set
-# CONFIG_ADVISE_SYSCALLS is not set
-CONFIG_EMBEDDED=y
-# CONFIG_VM_EVENT_COUNTERS is not set
-# CONFIG_COMPAT_BRK is not set
-CONFIG_SLOB=y
-# CONFIG_BLOCK is not set
-CONFIG_H8S_SIM=y
-CONFIG_H8300_BUILTIN_DTB="h8s_sim"
-# CONFIG_BINFMT_SCRIPT is not set
-CONFIG_BINFMT_FLAT=y
-# CONFIG_COREDUMP is not set
-# CONFIG_UEVENT_HELPER is not set
-# CONFIG_STANDALONE is not set
-# CONFIG_PREVENT_FIRMWARE_BUILD is not set
-# CONFIG_FW_LOADER is not set
-# CONFIG_ALLOW_DEV_COREDUMP is not set
-# CONFIG_INPUT is not set
-# CONFIG_SERIO is not set
-# CONFIG_VT is not set
-# CONFIG_UNIX98_PTYS is not set
-# CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVKMEM is not set
-CONFIG_SERIAL_SH_SCI=y
-CONFIG_SERIAL_SH_SCI_CONSOLE=y
-# CONFIG_HW_RANDOM is not set
-# CONFIG_HWMON is not set
-# CONFIG_USB_SUPPORT is not set
-# CONFIG_FILE_LOCKING is not set
-# CONFIG_DNOTIFY is not set
-# CONFIG_INOTIFY_USER is not set
-# CONFIG_PROC_FS is not set
-# CONFIG_SYSFS is not set
-# CONFIG_MISC_FILESYSTEMS is not set
-CONFIG_DEBUG_INFO=y
-# CONFIG_ENABLE_MUST_CHECK is not set

arch/h8300/include/asm/Kbuild

···
-# SPDX-License-Identifier: GPL-2.0
-generic-y += asm-offsets.h
-generic-y += cmpxchg.h
-generic-y += extable.h
-generic-y += kvm_para.h
-generic-y += mcs_spinlock.h
-generic-y += parport.h
-generic-y += spinlock.h

arch/h8300/include/asm/bitops.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_BITOPS_H
-#define _H8300_BITOPS_H
-
-/*
- * Copyright 1992, Linus Torvalds.
- * Copyright 2002, Yoshinori Sato
- */
-
-#include <linux/compiler.h>
-
-#include <asm-generic/bitops/fls.h>
-#include <asm-generic/bitops/__fls.h>
-#include <asm-generic/bitops/fls64.h>
-
-#ifdef __KERNEL__
-
-#ifndef _LINUX_BITOPS_H
-#error only <linux/bitops.h> can be included directly
-#endif
-
-/*
- * Function prototypes to keep gcc -Wall happy
- */
-
-/*
- * ffz = Find First Zero in word. Undefined if no zero exists,
- * so code should check against ~0UL first..
- */
-static inline unsigned long ffz(unsigned long word)
-{
-	unsigned long result;
-
-	result = -1;
-	__asm__("1:\n\t"
-		"shlr.l %1\n\t"
-		"adds #1,%0\n\t"
-		"bcs 1b"
-		: "=r"(result),"=r"(word)
-		: "0"(result), "1"(word));
-	return result;
-}
-
-#define H8300_GEN_BITOP(FNAME, OP)				\
-static inline void FNAME(int nr, volatile unsigned long *addr)	\
-{								\
-	unsigned char *b_addr;					\
-	unsigned char bit = nr & 7;				\
-								\
-	b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);	\
-	if (__builtin_constant_p(nr)) {				\
-		__asm__(OP " %1,%0" : "+WU"(*b_addr) : "i"(nr & 7));	\
-	} else {						\
-		__asm__(OP " %s1,%0" : "+WU"(*b_addr) : "r"(bit));	\
-	}							\
-}
-
-H8300_GEN_BITOP(set_bit,    "bset")
-H8300_GEN_BITOP(clear_bit,  "bclr")
-H8300_GEN_BITOP(change_bit, "bnot")
-#define __set_bit(nr, addr)    set_bit((nr), (addr))
-#define __clear_bit(nr, addr)  clear_bit((nr), (addr))
-#define __change_bit(nr, addr) change_bit((nr), (addr))
-
-#undef H8300_GEN_BITOP
-
-static inline int test_bit(int nr, const volatile unsigned long *addr)
-{
-	int ret = 0;
-	unsigned char *b_addr;
-	unsigned char bit = nr & 7;
-
-	b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);
-	if (__builtin_constant_p(nr)) {
-		__asm__("bld %Z2,%1\n\t"
-			"rotxl %0\n\t"
-			: "=r"(ret)
-			: "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc");
-	} else {
-		__asm__("btst %w2,%1\n\t"
-			"beq 1f\n\t"
-			"inc.l #1,%0\n"
-			"1:"
-			: "=r"(ret)
-			: "WU"(*b_addr), "r"(bit), "0"(ret) : "cc");
-	}
-	return ret;
-}
-
-#define __test_bit(nr, addr) test_bit(nr, addr)
-
-#define H8300_GEN_TEST_BITOP(FNNAME, OP)				\
-static inline int FNNAME(int nr, void *addr)				\
-{									\
-	int retval = 0;							\
-	char ccrsave;							\
-	unsigned char *b_addr;						\
-	unsigned char bit = nr & 7;					\
-									\
-	b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);		\
-	if (__builtin_constant_p(nr)) {					\
-		__asm__("stc ccr,%s2\n\t"				\
-			"orc #0x80,ccr\n\t"				\
-			"bld %4,%1\n\t"					\
-			OP " %4,%1\n\t"					\
-			"rotxl.l %0\n\t"				\
-			"ldc %s2,ccr"					\
-			: "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave)	\
-			: "0"(retval), "i"(nr & 7) : "cc");		\
-	} else {							\
-		__asm__("stc ccr,%t3\n\t"				\
-			"orc #0x80,ccr\n\t"				\
-			"btst %s3,%1\n\t"				\
-			OP " %s3,%1\n\t"				\
-			"beq 1f\n\t"					\
-			"inc.l #1,%0\n\t"				\
-			"1:\n"						\
-			"ldc %t3,ccr"					\
-			: "=r"(retval), "+WU" (*b_addr)			\
-			: "0" (retval), "r"(bit) : "cc");		\
-	}								\
-	return retval;							\
-}									\
-									\
-static inline int __ ## FNNAME(int nr, void *addr)			\
-{									\
-	int retval = 0;							\
-	unsigned char *b_addr;						\
-	unsigned char bit = nr & 7;					\
-									\
-	b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);		\
-	if (__builtin_constant_p(nr)) {					\
-		__asm__("bld %3,%1\n\t"					\
-			OP " %3,%1\n\t"					\
-			"rotxl.l %0\n\t"				\
-			: "=r"(retval), "+WU"(*b_addr)			\
-			: "0" (retval), "i"(nr & 7));			\
-	} else {							\
-		__asm__("btst %s3,%1\n\t"				\
-			OP " %s3,%1\n\t"				\
-			"beq 1f\n\t"					\
-			"inc.l #1,%0\n\t"				\
-			"1:"						\
-			: "=r"(retval), "+WU"(*b_addr)			\
-			: "0" (retval), "r"(bit));			\
-	}								\
-	return retval;							\
-}
-
-H8300_GEN_TEST_BITOP(test_and_set_bit,	  "bset")
-H8300_GEN_TEST_BITOP(test_and_clear_bit,  "bclr")
-H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot")
-#undef H8300_GEN_TEST_BITOP
-
-#include <asm-generic/bitops/ffs.h>
-
-static inline unsigned long __ffs(unsigned long word)
-{
-	unsigned long result;
-
-	result = -1;
-	__asm__("1:\n\t"
-		"shlr.l %1\n\t"
-		"adds #1,%0\n\t"
-		"bcc 1b"
-		: "=r" (result),"=r"(word)
-		: "0"(result), "1"(word));
-	return result;
-}
-
-#include <asm-generic/bitops/sched.h>
-#include <asm-generic/bitops/hweight.h>
-#include <asm-generic/bitops/lock.h>
-#include <asm-generic/bitops/le.h>
-#include <asm-generic/bitops/ext2-atomic.h>
-
-#endif /* __KERNEL__ */
-
-#endif /* _H8300_BITOPS_H */

arch/h8300/include/asm/bug.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_BUG_H
-#define _H8300_BUG_H
-
-/* always true */
-#define is_valid_bugaddr(addr) (1)
-
-#include <asm-generic/bug.h>
-
-struct pt_regs;
-extern void die(const char *str, struct pt_regs *fp, unsigned long err);
-
-#endif

arch/h8300/include/asm/byteorder.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __H8300_BYTEORDER_H__
-#define __H8300_BYTEORDER_H__
-
-#include <linux/byteorder/big_endian.h>
-
-#endif

arch/h8300/include/asm/cache.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ARCH_H8300_CACHE_H
-#define __ARCH_H8300_CACHE_H
-
-/* bytes per L1 cache line */
-#define        L1_CACHE_SHIFT  2
-#define        L1_CACHE_BYTES  (1 << L1_CACHE_SHIFT)
-
-#define __cacheline_aligned
-#define ____cacheline_aligned
-
-#endif

arch/h8300/include/asm/elf.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_H8300_ELF_H
-#define __ASM_H8300_ELF_H
-
-/*
- * ELF register definitions..
- */
-
-#include <asm/ptrace.h>
-#include <asm/user.h>
-
-typedef unsigned long elf_greg_t;
-
-#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
-typedef elf_greg_t elf_gregset_t[ELF_NGREG];
-typedef unsigned long elf_fpregset_t;
-
-/*
- * This is used to ensure we don't load something for the wrong architecture.
- */
-#define elf_check_arch(x) ((x)->e_machine == EM_H8_300)
-
-/*
- * These are used to set parameters in the core dumps.
- */
-#define ELF_CLASS	ELFCLASS32
-#define ELF_DATA	ELFDATA2MSB
-#define ELF_ARCH	EM_H8_300
-#if defined(CONFIG_CPU_H8300H)
-#define ELF_CORE_EFLAGS 0x810000
-#endif
-#if defined(CONFIG_CPU_H8S)
-#define ELF_CORE_EFLAGS 0x820000
-#endif
-
-#define ELF_PLAT_INIT(_r) do { (_r)->er1 = 0; } while (0)
-
-#define ELF_EXEC_PAGESIZE	4096
-
-/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
-   use of this is to invoke "./ld.so someprog" to test out a new version of
-   the loader.  We need to make sure that it is out of the way of the program
-   that it will "exec", and that there is sufficient room for the brk.  */
-
-#define ELF_ET_DYN_BASE         0xD0000000UL
-
-/* This yields a mask that user programs can use to figure out what
-   instruction set this cpu supports.  */
-
-#define ELF_HWCAP	(0)
-
-/* This yields a string that ld.so will use to load implementation
-   specific libraries for optimization.  This is more specific in
-   intent than poking at uname or /proc/cpuinfo.  */
-
-#define ELF_PLATFORM  (NULL)
-
-#define R_H8_NONE       0
-#define R_H8_DIR32      1
-#define R_H8_DIR32_28   2
-#define R_H8_DIR32_24   3
-#define R_H8_DIR32_16   4
-#define R_H8_DIR32U     6
-#define R_H8_DIR32U_28  7
-#define R_H8_DIR32U_24  8
-#define R_H8_DIR32U_20  9
-#define R_H8_DIR32U_16 10
-#define R_H8_DIR24     11
-#define R_H8_DIR24_20  12
-#define R_H8_DIR24_16  13
-#define R_H8_DIR24U    14
-#define R_H8_DIR24U_20 15
-#define R_H8_DIR24U_16 16
-#define R_H8_DIR16     17
-#define R_H8_DIR16U    18
-#define R_H8_DIR16S_32 19
-#define R_H8_DIR16S_28 20
-#define R_H8_DIR16S_24 21
-#define R_H8_DIR16S_20 22
-#define R_H8_DIR16S    23
-#define R_H8_DIR8      24
-#define R_H8_DIR8U     25
-#define R_H8_DIR8Z_32  26
-#define R_H8_DIR8Z_28  27
-#define R_H8_DIR8Z_24  28
-#define R_H8_DIR8Z_20  29
-#define R_H8_DIR8Z_16  30
-#define R_H8_PCREL16   31
-#define R_H8_PCREL8    32
-#define R_H8_BPOS      33
-#define R_H8_PCREL32   34
-#define R_H8_GOT32O    35
-#define R_H8_GOT16O    36
-#define R_H8_DIR16A8   59
-#define R_H8_DIR16R8   60
-#define R_H8_DIR24A8   61
-#define R_H8_DIR24R8   62
-#define R_H8_DIR32A16  63
-#define R_H8_ABS32     65
-#define R_H8_ABS32A16 127
-
-#endif

arch/h8300/include/asm/flat.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * arch/h8300/asm/include/flat.h -- uClinux flat-format executables
- */
-
-#ifndef __H8300_FLAT_H__
-#define __H8300_FLAT_H__
-
-#include <asm/unaligned.h>
-
-/*
- * on the H8 a couple of the relocations have an instruction in the
- * top byte.  As there can only be 24bits of address space,  we just
- * always preserve that 8bits at the top,  when it isn't an instruction
- * is is 0 ([e-mail])
- */
-
-#define	flat_get_relocate_addr(rel)		(rel & ~0x00000001)
-static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
-					u32 *addr)
-{
-	u32 val = get_unaligned((__force u32 *)rp);
-	if (!(flags & FLAT_FLAG_GOTPIC))
-		val &= 0x00ffffff;
-	*addr = val;
-	return 0;
-}
-
-static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
-{
-	u32 *p = (__force u32 *)rp;
-	put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
-	return 0;
-}
-
-#endif /* __H8300_FLAT_H__ */

arch/h8300/include/asm/hash.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_HASH_H
-#define _ASM_HASH_H
-
-/*
- * The later H8SX models have a 32x32-bit multiply, but the H8/300H
- * and H8S have only 16x16->32.  Since it's tolerably compact, this is
- * basically an inlined version of the __mulsi3 code.  Since the inputs
- * are not expected to be small, it's also simplfied by skipping the
- * early-out checks.
- *
- * (Since neither CPU has any multi-bit shift instructions, a
- * shift-and-add version is a non-starter.)
- *
- * TODO: come up with an arch-specific version of the hashing in fs/namei.c,
- * since that is heavily dependent on rotates.  Which, as mentioned, suck
- * horribly on H8.
- */
-
-#if defined(CONFIG_CPU_H300H) || defined(CONFIG_CPU_H8S)
-
-#define HAVE_ARCH__HASH_32 1
-
-/*
- * Multiply by k = 0x61C88647.  Fitting this into three registers requires
- * one extra instruction, but reducing register pressure will probably
- * make that back and then some.
- *
- * GCC asm note: %e1 is the high half of operand %1, while %f1 is the
- * low half.  So if %1 is er4, then %e1 is e4 and %f1 is r4.
- *
- * This has been designed to modify x in place, since that's the most
- * common usage, but preserve k, since hash_64() makes two calls in
- * quick succession.
- */
-static inline u32 __attribute_const__ __hash_32(u32 x)
-{
-	u32 temp;
-
-	asm(   "mov.w	%e1,%f0"
-	"\n	mulxu.w	%f2,%0"		/* klow * xhigh */
-	"\n	mov.w	%f0,%e1"	/* The extra instruction */
-	"\n	mov.w	%f1,%f0"
-	"\n	mulxu.w	%e2,%0"		/* khigh * xlow */
-	"\n	add.w	%e1,%f0"
-	"\n	mulxu.w	%f2,%1"		/* klow * xlow */
-	"\n	add.w	%f0,%e1"
-	: "=&r" (temp), "=r" (x)
-	: "%r" (GOLDEN_RATIO_32), "1" (x));
-	return x;
-}
-
-#endif
-#endif /* _ASM_HASH_H */

arch/h8300/include/asm/io.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_IO_H
-#define _H8300_IO_H
-
-#ifdef __KERNEL__
-
-#include <linux/types.h>
-
-/* H8/300 internal I/O functions */
-
-#define __raw_readb __raw_readb
-static inline u8 __raw_readb(const volatile void __iomem *addr)
-{
-	return *(volatile u8 *)addr;
-}
-
-#define __raw_readw __raw_readw
-static inline u16 __raw_readw(const volatile void __iomem *addr)
-{
-	return *(volatile u16 *)addr;
-}
-
-#define __raw_readl __raw_readl
-static inline u32  __raw_readl(const volatile void __iomem *addr)
-{
-	return *(volatile u32 *)addr;
-}
-
-#define __raw_writeb __raw_writeb
-static inline void __raw_writeb(u8 b, const volatile void __iomem *addr)
-{
-	*(volatile u8 *)addr = b;
-}
-
-#define __raw_writew __raw_writew
-static inline void __raw_writew(u16 b, const volatile void __iomem *addr)
-{
-	*(volatile u16 *)addr = b;
-}
-
-#define __raw_writel __raw_writel
-static inline void __raw_writel(u32 b, const volatile void __iomem *addr)
-{
-	*(volatile u32 *)addr = b;
-}
-
-static inline void ctrl_bclr(int b, void __iomem *addr)
-{
-	if (__builtin_constant_p(b))
-		__asm__("bclr %1,%0" : "+WU"(*(u8 *)addr): "i"(b));
-	else
-		__asm__("bclr %w1,%0" : "+WU"(*(u8 *)addr): "r"(b));
-}
-
-static inline void ctrl_bset(int b, void __iomem *addr)
-{
-	if (__builtin_constant_p(b))
-		__asm__("bset %1,%0" : "+WU"(*(u8 *)addr): "i"(b));
-	else
-		__asm__("bset %w1,%0" : "+WU"(*(u8 *)addr): "r"(b));
-}
-
-#include <asm-generic/io.h>
-
-#endif /* __KERNEL__ */
-
-#endif /* _H8300_IO_H */

arch/h8300/include/asm/irq.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_IRQ_H_
-#define _H8300_IRQ_H_
-
-#if defined(CONFIG_CPU_H8300H)
-#define NR_IRQS 64
-#define IRQ_CHIP h8300h_irq_chip
-#define EXT_IRQ0 12
-#define EXT_IRQS 6
-#elif defined(CONFIG_CPU_H8S)
-#define NR_IRQS 128
-#define IRQ_CHIP h8s_irq_chip
-#define EXT_IRQ0 16
-#define EXT_IRQS 16
-#endif
-
-static inline int irq_canonicalize(int irq)
-{
-	return irq;
-}
-
-void h8300_init_ipr(void);
-extern struct irq_chip h8300h_irq_chip;
-extern struct irq_chip h8s_irq_chip;
-#endif /* _H8300_IRQ_H_ */

arch/h8300/include/asm/irqflags.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_IRQFLAGS_H
-#define _H8300_IRQFLAGS_H
-
-#ifdef CONFIG_CPU_H8300H
-typedef unsigned char h8300flags;
-
-static inline h8300flags arch_local_save_flags(void)
-{
-	h8300flags flags;
-
-	__asm__ volatile ("stc ccr,%w0" : "=r" (flags));
-	return flags;
-}
-
-static inline void arch_local_irq_disable(void)
-{
-	__asm__ volatile ("orc  #0xc0,ccr");
-}
-
-static inline void arch_local_irq_enable(void)
-{
-	__asm__ volatile ("andc #0x3f,ccr");
-}
-
-static inline h8300flags arch_local_irq_save(void)
-{
-	h8300flags flags;
-
-	__asm__ volatile ("stc ccr,%w0\n\t"
-		      "orc  #0xc0,ccr" : "=r" (flags));
-	return flags;
-}
-
-static inline void arch_local_irq_restore(h8300flags flags)
-{
-	__asm__ volatile ("ldc %w0,ccr" : : "r" (flags) : "cc");
-}
-
-static inline int arch_irqs_disabled_flags(unsigned long flags)
-{
-	return (flags & 0xc0) == 0xc0;
-}
-#endif
-#ifdef CONFIG_CPU_H8S
-typedef unsigned short h8300flags;
-
-static inline h8300flags arch_local_save_flags(void)
-{
-	h8300flags flags;
-
-	__asm__ volatile ("stc ccr,%w0\n\tstc exr,%x0" : "=r" (flags));
-	return flags;
-}
-
-static inline void arch_local_irq_disable(void)
-{
-	__asm__ volatile ("orc #0x80,ccr\n\t");
-}
-
-static inline void arch_local_irq_enable(void)
-{
-	__asm__ volatile ("andc #0x7f,ccr\n\t"
-		      "andc #0xf0,exr\n\t");
-}
-
-static inline h8300flags arch_local_irq_save(void)
-{
-	h8300flags flags;
-
-	__asm__ volatile ("stc ccr,%w0\n\t"
-		      "stc exr,%x0\n\t"
-		      "orc  #0x80,ccr\n\t"
-		      : "=r" (flags));
-	return flags;
-}
-
-static inline void arch_local_irq_restore(h8300flags flags)
-{
-	__asm__ volatile ("ldc %w0,ccr\n\t"
-		      "ldc %x0,exr"
-		      : : "r" (flags) : "cc");
-}
-
-static inline int arch_irqs_disabled_flags(h8300flags flags)
-{
-	return (flags & 0x0080) == 0x0080;
-}
-
-#endif
-
-static inline int arch_irqs_disabled(void)
-{
-	return arch_irqs_disabled_flags(arch_local_save_flags());
-}
-
-#endif /* _H8300_IRQFLAGS_H */

arch/h8300/include/asm/kgdb.h

···
-/*
- * Copyright (C) 2015 Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#ifndef _ASM_H8300_KGDB_H
-#define _ASM_H8300_KGDB_H
-
-#define CACHE_FLUSH_IS_SAFE	1
-#define BUFMAX			2048
-
-enum regnames {
-	GDB_ER0, GDB_ER1, GDB_ER2, GDB_ER3,
-	GDB_ER4, GDB_ER5, GDB_ER6, GDB_SP,
-	GDB_CCR, GDB_PC,
-	GDB_CYCLLE,
-#if defined(CONFIG_CPU_H8S)
-	GDB_EXR,
-#endif
-	GDB_TICK, GDB_INST,
-#if defined(CONFIG_CPU_H8S)
-	GDB_MACH, GDB_MACL,
-#endif
-	/* do not change the last entry or anything below! */
-	GDB_NUMREGBYTES,		/* number of registers */
-};
-
-#define GDB_SIZEOF_REG		sizeof(u32)
-#if defined(CONFIG_CPU_H8300H)
-#define DBG_MAX_REG_NUM		(13)
-#elif defined(CONFIG_CPU_H8S)
-#define DBG_MAX_REG_NUM		(14)
-#endif
-#define NUMREGBYTES		(DBG_MAX_REG_NUM * GDB_SIZEOF_REG)
-
-#define BREAK_INSTR_SIZE	2
-static inline void arch_kgdb_breakpoint(void)
-{
-	__asm__ __volatile__("trapa #2");
-}
-
-#endif /* _ASM_H8300_KGDB_H */

arch/h8300/include/asm/mmu_context.h

···
-#ifndef _ASM_H8300_MMU_CONTEXT_H
-#define _ASM_H8300_MMU_CONTEXT_H
-
-#include <asm-generic/nommu_context.h>
-
-#endif /* _ASM_H8300_MMU_CONTEXT_H */

arch/h8300/include/asm/page.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_PAGE_H
-#define _H8300_PAGE_H
-
-#include <asm-generic/page.h>
-#include <linux/types.h>
-
-#define MAP_NR(addr) (((uintptr_t)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
-
-#ifndef __ASSEMBLY__
-extern unsigned long rom_length;
-extern unsigned long memory_start;
-extern unsigned long memory_end;
-extern unsigned long _ramend;
-#endif
-
-#endif

arch/h8300/include/asm/page_offset.h

···
-
-#define PAGE_OFFSET_RAW		0x00000000

arch/h8300/include/asm/pgtable.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_PGTABLE_H
-#define _H8300_PGTABLE_H
-#include <asm-generic/pgtable-nopud.h>
-extern void paging_init(void);
-#define PAGE_NONE		__pgprot(0)    /* these mean nothing to NO_MM */
-#define PAGE_SHARED		__pgprot(0)    /* these mean nothing to NO_MM */
-#define PAGE_COPY		__pgprot(0)    /* these mean nothing to NO_MM */
-#define PAGE_READONLY	__pgprot(0)    /* these mean nothing to NO_MM */
-#define PAGE_KERNEL		__pgprot(0)    /* these mean nothing to NO_MM */
-#define __swp_type(x)		(0)
-#define __swp_offset(x)		(0)
-#define __swp_entry(typ, off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
-#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
-#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
-#define kern_addr_valid(addr)	(1)
-#define pgprot_writecombine(prot)  (prot)
-#define pgprot_noncached pgprot_writecombine
-
-static inline int pte_file(pte_t pte) { return 0; }
-#define swapper_pg_dir ((pgd_t *) 0)
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-#define ZERO_PAGE(vaddr)	(virt_to_page(0))
-
-/*
- * These would be in other places but having them here reduces the diffs.
- */
-extern unsigned int kobjsize(const void *objp);
-extern int is_in_rom(unsigned long);
-
-/*
- * All 32bit addresses are effectively valid for vmalloc...
- * Sort of meaningless for non-VM targets.
- */
-#define	VMALLOC_START	0
-#define	VMALLOC_END	0xffffffff
-
-#define arch_enter_lazy_cpu_mode()    do {} while (0)
-
-#endif /* _H8300_PGTABLE_H */

arch/h8300/include/asm/processor.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * include/asm-h8300/processor.h
- *
- * Copyright (C) 2002 Yoshinori Sato
- *
- * Based on: linux/asm-m68nommu/processor.h
- *
- * Copyright (C) 1995 Hamish Macdonald
- */
-
-#ifndef __ASM_H8300_PROCESSOR_H
-#define __ASM_H8300_PROCESSOR_H
-
-#include <linux/compiler.h>
-#include <asm/ptrace.h>
-#include <asm/current.h>
-
-static inline unsigned long rdusp(void)
-{
-	extern unsigned int	_sw_usp;
-
-	return _sw_usp;
-}
-
-static inline void wrusp(unsigned long usp)
-{
-	extern unsigned int	_sw_usp;
-
-	_sw_usp = usp;
-}
-
-/*
- * User space process size: 3.75GB. This is hardcoded into a few places,
- * so don't change it unless you know what you are doing.
- */
-#define TASK_SIZE	(0xFFFFFFFFUL)
-
-#ifdef __KERNEL__
-#define STACK_TOP	TASK_SIZE
-#define STACK_TOP_MAX	STACK_TOP
-#endif
-
-/*
- * This decides where the kernel will search for a free chunk of vm
- * space during mmap's. We won't be using it
- */
-#define TASK_UNMAPPED_BASE	0
-
-struct thread_struct {
-	unsigned long  ksp;		/* kernel stack pointer */
-	unsigned long  usp;		/* user stack pointer */
-	unsigned long  ccr;		/* saved status register */
-	unsigned long  esp0;            /* points to SR of stack frame */
-	struct {
-		unsigned short *addr;
-		unsigned short inst;
-	} breakinfo;
-};
-
-#define INIT_THREAD  {						\
-	.ksp  = sizeof(init_stack) + (unsigned long)init_stack, \
-	.usp  = 0,						\
-	.ccr  = PS_S,						\
-	.esp0 = 0,						\
-	.breakinfo = {						\
-		.addr = (unsigned short *)-1,			\
-		.inst = 0					\
-	}							\
-}
-
-/*
- * Do necessary setup to start up a newly executed thread.
- *
- * pass the data segment into user programs if it exists,
- * it can't hurt anything as far as I can tell
- */
-#if defined(CONFIG_CPU_H8300H)
-#define start_thread(_regs, _pc, _usp)				\
-do {								\
-	(_regs)->pc = (_pc);					\
-	(_regs)->ccr = 0x00;	   /* clear all flags */	\
-	(_regs)->er5 = current->mm->start_data;	/* GOT base */	\
-	(_regs)->sp = ((unsigned long)(_usp)) - sizeof(unsigned long) * 3; \
-} while (0)
-#endif
-#if defined(CONFIG_CPU_H8S)
-#define start_thread(_regs, _pc, _usp)				\
-do {								\
-	(_regs)->pc = (_pc);					\
-	(_regs)->ccr = 0x00;	   /* clear kernel flag */	\
-	(_regs)->exr = 0x78;	   /* enable all interrupts */	\
-	(_regs)->er5 = current->mm->start_data;	/* GOT base */	\
-	/* 14 = space for retaddr(4), vector(4), er0(4) and exr(2) on stack */ \
-	(_regs)->sp = ((unsigned long)(_usp)) - 14;		\
-} while (0)
-#endif
-
-/* Forward declaration, a strange C thing */
-struct task_struct;
-
-/* Free all resources held by a thread. */
-static inline void release_thread(struct task_struct *dead_task)
-{
-}
-
-unsigned long __get_wchan(struct task_struct *p);
-
-#define	KSTK_EIP(tsk)	\
-	({			 \
-		unsigned long eip = 0;	      \
-		if ((tsk)->thread.esp0 > PAGE_SIZE &&	\
-		    MAP_NR((tsk)->thread.esp0) < max_mapnr)	 \
-			eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
-		eip; })
-
-#define	KSTK_ESP(tsk)	((tsk) == current ? rdusp() : (tsk)->thread.usp)
-
-#define cpu_relax()    barrier()
-
-#define HARD_RESET_NOW() ({		\
-	local_irq_disable();		\
-	asm("jmp @@0");			\
-})
-
-#endif

arch/h8300/include/asm/ptrace.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_PTRACE_H
-#define _H8300_PTRACE_H
-
-#include <uapi/asm/ptrace.h>
-
-struct task_struct;
-
-#ifndef __ASSEMBLY__
-#ifndef PS_S
-#define PS_S  (0x10)
-#endif
-
-#if defined(CONFIG_CPU_H8300H)
-#define H8300_REGS_NO 11
-#endif
-#if defined(CONFIG_CPU_H8S)
-#define H8300_REGS_NO 12
-#endif
-
-#define arch_has_single_step()	(1)
-
-#define user_mode(regs) (!((regs)->ccr & PS_S))
-#define instruction_pointer(regs) ((regs)->pc)
-#define profile_pc(regs) instruction_pointer(regs)
-#define user_stack_pointer(regs) ((regs)->sp)
-#define current_pt_regs() ((struct pt_regs *) \
-	(THREAD_SIZE + (unsigned long)current_thread_info()) - 1)
-#define signal_pt_regs() ((struct pt_regs *)current->thread.esp0)
-#define current_user_stack_pointer() rdusp()
-#define task_pt_regs(task) \
-	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
-
-extern long h8300_get_reg(struct task_struct *task, int regno);
-extern int h8300_put_reg(struct task_struct *task, int regno,
-			 unsigned long data);
-
-#endif /* __ASSEMBLY__ */
-#endif /* _H8300_PTRACE_H */

arch/h8300/include/asm/signal.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_SIGNAL_H
-#define _H8300_SIGNAL_H
-
-#include <uapi/asm/signal.h>
-
-/* Most things should be clean enough to redefine this at will, if care
-   is taken to make libc match.  */
-
-#define _NSIG		64
-#define _NSIG_BPW	32
-#define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
-
-typedef unsigned long old_sigset_t;		/* at least 32 bits */
-
-typedef struct {
-	unsigned long sig[_NSIG_WORDS];
-} sigset_t;
-
-#define __ARCH_HAS_SA_RESTORER
-#include <asm/sigcontext.h>
-
-#endif /* _H8300_SIGNAL_H */

arch/h8300/include/asm/smp.h

···
-/* nothing required here yet */

arch/h8300/include/asm/string.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_STRING_H_
-#define _H8300_STRING_H_
-
-#ifdef __KERNEL__ /* only set these up for kernel code */
-
-#include <asm/setup.h>
-#include <asm/page.h>
-
-#define __HAVE_ARCH_MEMSET
-extern void *memset(void *s, int c, size_t count);
-
-#define __HAVE_ARCH_MEMCPY
-extern void *memcpy(void *d, const void *s, size_t count);
-
-#endif /* KERNEL */
-
-#endif

arch/h8300/include/asm/switch_to.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_SWITCH_TO_H
-#define _H8300_SWITCH_TO_H
-
-/*
- * switch_to(n) should switch tasks to task ptr, first checking that
- * ptr isn't the current task, in which case it does nothing.  This
- * also clears the TS-flag if the task we switched to has used the
- * math co-processor latest.
- */
-/*
- * switch_to() saves the extra registers, that are not saved
- * automatically by SAVE_SWITCH_STACK in resume(), ie. d0-d5 and
- * a0-a1. Some of these are used by schedule() and its predecessors
- * and so we might get see unexpected behaviors when a task returns
- * with unexpected register values.
- *
- * syscall stores these registers itself and none of them are used
- * by syscall after the function in the syscall has been called.
- *
- * Beware that resume now expects *next to be in d1 and the offset of
- * tss to be in a1. This saves a few instructions as we no longer have
- * to push them onto the stack and read them back right after.
- *
- * 02/17/96 - Jes Sorensen ([e-mail])
- *
- * Changed 96/09/19 by Andreas Schwab
- * pass prev in a0, next in a1, offset of tss in d1, and whether
- * the mm structures are shared in d2 (to avoid atc flushing).
- *
- * H8/300 Porting 2002/09/04 Yoshinori Sato
- */
-
-asmlinkage void resume(void);
-#define switch_to(prev, next, last) \
-do {			     \
-	void *_last;					    \
-	__asm__ __volatile__(				    \
-		"mov.l	%1, er0\n\t"			    \
-		"mov.l	%2, er1\n\t"			    \
-		"mov.l	%3, er2\n\t"			    \
-		"jsr @_resume\n\t"			    \
-		"mov.l	er2,%0\n\t"			    \
-		: "=r" (_last)				    \
-		: "r" (&(prev->thread)),		    \
-		  "r" (&(next->thread)),		    \
-		  "g" (prev)				    \
-		: "cc", "er0", "er1", "er2", "er3");	    \
-	(last) = _last;					    \
-} while (0)
-
-#endif /* _H8300_SWITCH_TO_H */

arch/h8300/include/asm/syscall.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_H8300_SYSCALLS_32_H
-#define __ASM_H8300_SYSCALLS_32_H
-
-#ifdef __KERNEL__
-
-#include <linux/compiler.h>
-#include <linux/linkage.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <uapi/linux/audit.h>
-
-static inline int
-syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
-{
-	return regs->orig_er0;
-}
-
-static inline void
-syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
-		      unsigned long *args)
-{
-	*args++ = regs->er1;
-	*args++ = regs->er2;
-	*args++ = regs->er3;
-	*args++ = regs->er4;
-	*args++ = regs->er5;
-	*args   = regs->er6;
-}
-
-static inline int
-syscall_get_arch(struct task_struct *task)
-{
-	return AUDIT_ARCH_H8300;
-}
-
-
-/* Misc syscall related bits */
-asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
-asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
-
-#endif /* __KERNEL__ */
-#endif /* __ASM_H8300_SYSCALLS_32_H */

arch/h8300/include/asm/thread_info.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/* thread_info.h: h8300 low-level thread information
- * adapted from the i386 and PPC versions by Yoshinori Sato <[e-mail]>
- *
- * Copyright (C) 2002  David Howells ([e-mail])
- * - Incorporating suggestions made by Linus Torvalds and Dave Miller
- */
-
-#ifndef _ASM_THREAD_INFO_H
-#define _ASM_THREAD_INFO_H
-
-#include <asm/page.h>
-
-#ifdef __KERNEL__
-
-/*
- * Size of kernel stack for each process. This must be a power of 2...
- */
-#define THREAD_SIZE_ORDER	1
-#define THREAD_SIZE		8192	/* 2 pages */
-
-#ifndef __ASSEMBLY__
-
-/*
- * low level task data.
- * If you change this, change the TI_* offsets below to match.
- */
-struct thread_info {
-	struct task_struct *task;		/* main task structure */
-	unsigned long	   flags;		/* low level flags */
-	int		   cpu;			/* cpu we're on */
-	int		   preempt_count;	/* 0 => preemptable, <0 => BUG */
-};
-
-/*
- * macros/functions for gaining access to the thread information structure
- */
-#define INIT_THREAD_INFO(tsk)			\
-{						\
-	.task =		&tsk,			\
-	.flags =	0,			\
-	.cpu =		0,			\
-	.preempt_count = INIT_PREEMPT_COUNT,	\
-}
-
-/* how to get the thread information struct from C */
-static inline struct thread_info *current_thread_info(void)
-{
-	struct thread_info *ti;
-
-	__asm__("mov.l	sp, %0\n\t"
-		"and.w	%1, %T0"
-		: "=&r"(ti)
-		: "i" (~(THREAD_SIZE-1) & 0xffff));
-	return ti;
-}
-
-#endif /* __ASSEMBLY__ */
-
-/*
- * thread information flag bit numbers
- */
-#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
-#define TIF_SIGPENDING		1	/* signal pending */
-#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
-#define TIF_SINGLESTEP		3	/* singlestepping active */
-#define TIF_MEMDIE		4	/* is terminating due to OOM killer */
-#define TIF_RESTORE_SIGMASK	5	/* restore signal mask in do_signal() */
-#define TIF_NOTIFY_RESUME	6	/* callback before returning to user */
-#define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
-#define TIF_SYSCALL_TRACEPOINT	8	/* for ftrace syscall instrumentation */
-#define TIF_POLLING_NRFLAG	9	/* true if poll_idle() is polling TIF_NEED_RESCHED */
-#define TIF_NOTIFY_SIGNAL	10	/* signal notifications exist */
-
-/* as above, but as bit values */
-#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
-#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
-#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
-#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
-#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
-#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
-#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)
-#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
-#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
-
-/* work to do in syscall trace */
-#define _TIF_WORK_SYSCALL_MASK	(_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
-				 _TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT)
-
-/* work to do on any return to u-space */
-#define _TIF_ALLWORK_MASK	(_TIF_SYSCALL_TRACE | _TIF_SIGPENDING      | \
-				 _TIF_NEED_RESCHED  | _TIF_SYSCALL_AUDIT   | \
-				 _TIF_SINGLESTEP    | _TIF_NOTIFY_RESUME   | \
-				 _TIF_SYSCALL_TRACEPOINT | _TIF_NOTIFY_SIGNAL)
-
-/* work to do on interrupt/exception return */
-#define _TIF_WORK_MASK		(_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
-				 _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
-
-#endif /* __KERNEL__ */
-
-#endif /* _ASM_THREAD_INFO_H */

arch/h8300/include/asm/tlb.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __H8300_TLB_H__
-#define __H8300_TLB_H__
-
-#include <asm-generic/tlb.h>
-
-#endif

arch/h8300/include/asm/traps.h

···
-/*
- *  linux/include/asm-h8300/traps.h
- *
- *  Copyright (C) 2003 Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#ifndef _H8300_TRAPS_H
-#define _H8300_TRAPS_H
-
-extern void _system_call(void);
-extern void _interrupt_entry(void);
-extern void _trace_break(void);
-extern void _nmi(void);
-extern void _interrupt_entry(void);
-
-extern unsigned long *_interrupt_redirect_table;
-
-#define JMP_OP 0x5a000000
-#define JSR_OP 0x5e000000
-#define VECTOR(address) ((JMP_OP)|((unsigned long)address))
-#define REDIRECT(address) ((JSR_OP)|((unsigned long)address))
-#define CPU_VECTOR ((unsigned long *)0x000000)
-#define ADDR_MASK (0xffffff)
-
-#define TRACE_VEC 5
-
-#define TRAP0_VEC 8
-#define TRAP1_VEC 9
-#define TRAP2_VEC 10
-#define TRAP3_VEC 11
-
-extern char _start[], _etext[];
-#define check_kernel_text(addr) \
-	((addr >= (unsigned long)(_start)) && \
-	 (addr <  (unsigned long)(_etext)) && !(addr & 1))
-
-#endif /* _H8300_TRAPS_H */

arch/h8300/include/asm/user.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_USER_H
-#define _H8300_USER_H
-
-#include <asm/page.h>
-
-/* Core file format: The core file is written in such a way that gdb
-   can understand it and provide useful information to the user (under
-   linux we use the 'trad-core' bfd).  There are quite a number of
-   obstacles to being able to view the contents of the floating point
-   registers, and until these are solved you will not be able to view the
-   contents of them.  Actually, you can read in the core file and look at
-   the contents of the user struct to find out what the floating point
-   registers contain.
-   The actual file contents are as follows:
-   UPAGE: 1 page consisting of a user struct that tells gdb what is present
-   in the file.  Directly after this is a copy of the task_struct, which
-   is currently not used by gdb, but it may come in useful at some point.
-   All of the registers are stored as part of the upage.  The upage should
-   always be only one page.
-   DATA: The data area is stored.  We use current->end_text to
-   current->brk to pick up all of the user variables, plus any memory
-   that may have been malloced.  No attempt is made to determine if a page
-   is demand-zero or if a page is totally unused, we just cover the entire
-   range.  All of the addresses are rounded in such a way that an integral
-   number of pages is written.
-   STACK: We need the stack information in order to get a meaningful
-   backtrace.  We need to write the data from (esp) to
-   current->start_stack, so we round each of these off in order to be able
-   to write an integer number of pages.
-   The minimum core file size is 3 pages, or 12288 bytes.
-*/
-
-/* This is the old layout of "struct pt_regs" as of Linux 1.x, and
-   is still the layout used by user (the new pt_regs doesn't have
-   all registers). */
-struct user_regs_struct {
-	long er1, er2, er3, er4, er5, er6;
-	long er0;
-	long usp;
-	long orig_er0;
-	long ccr;
-	long pc;
-};
-
-/* When the kernel dumps core, it starts by dumping the user struct -
-   this will be used by gdb to figure out where the data and stack segments
-   are within the file, and what virtual addresses to use. */
-struct user {
-/* We start with the registers, to mimic the way that "memory" is returned
-   from the ptrace(3,...) function.  */
-	struct user_regs_struct regs;	/* Where the registers are actually stored */
-/* ptrace does not yet supply these.  Someday.... */
-/* The rest of this junk is to help gdb figure out what goes where */
-	unsigned long int u_tsize;	/* Text segment size (pages). */
-	unsigned long int u_dsize;	/* Data segment size (pages). */
-	unsigned long int u_ssize;	/* Stack segment size (pages). */
-	unsigned long start_code;     /* Starting virtual address of text. */
-	unsigned long start_stack;	/* Starting virtual address of stack area.
-					   This is actually the bottom of the stack,
-					   the top of the stack is always found in the
-					   esp register.  */
-	long int signal;		/* Signal that caused the core dump. */
-	int reserved;			/* No longer used */
-	unsigned long u_ar0;		/* Used by gdb to help find the values for */
-	/* the registers. */
-	unsigned long magic;		/* To uniquely identify a core file */
-	char u_comm[32];		/* User command that was responsible */
-};
-
-#endif

arch/h8300/include/asm/vmalloc.h

···
-#ifndef _ASM_H8300_VMALLOC_H
-#define _ASM_H8300_VMALLOC_H
-
-#endif /* _ASM_H8300_VMALLOC_H */

arch/h8300/include/uapi/asm/Kbuild

···
-# SPDX-License-Identifier: GPL-2.0
-generic-y += ucontext.h

arch/h8300/include/uapi/asm/byteorder.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _H8300_BYTEORDER_H
-#define _H8300_BYTEORDER_H
-
-#include <linux/byteorder/big_endian.h>
-
-#endif /* _H8300_BYTEORDER_H */

arch/h8300/include/uapi/asm/posix_types.h

···
-/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
-#ifndef _UAPI_ASM_POSIX_TYPES_H
-#define _UAPI_ASM_POSIX_TYPES_H
-
-/* h8300-unknown-linux required long */
-#define __kernel_size_t __kernel_size_t
-typedef unsigned long	__kernel_size_t;
-typedef long		__kernel_ssize_t;
-typedef long		__kernel_ptrdiff_t;
-
-#include <asm-generic/posix_types.h>
-
-#endif /* _UAPI_ASM_POSIX_TYPES_H */

arch/h8300/include/uapi/asm/ptrace.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI_H8300_PTRACE_H
-#define _UAPI_H8300_PTRACE_H
-
-#ifndef __ASSEMBLY__
-
-#define PT_ER1	   0
-#define PT_ER2	   1
-#define PT_ER3	   2
-#define PT_ER4	   3
-#define PT_ER5	   4
-#define PT_ER6	   5
-#define PT_ER0	   6
-#define PT_USP	   7
-#define PT_ORIG_ER0	   8
-#define PT_CCR	   9
-#define PT_PC	   10
-#define PT_EXR     11
-
-/* this struct defines the way the registers are stored on the
-   stack during a system call. */
-
-struct pt_regs {
-	long     retpc;
-	long     er4;
-	long     er5;
-	long     er6;
-	long     er3;
-	long     er2;
-	long     er1;
-	long     orig_er0;
-	long	 sp;
-	unsigned short	 ccr;
-	long     er0;
-	long     vector;
-#if defined(__H8300S__)
-	unsigned short	 exr;
-#endif
-	unsigned long  pc;
-} __attribute__((aligned(2), packed));
-
-#endif /* __ASSEMBLY__ */
-#endif /* _UAPI_H8300_PTRACE_H */

arch/h8300/include/uapi/asm/sigcontext.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _ASM_H8300_SIGCONTEXT_H
-#define _ASM_H8300_SIGCONTEXT_H
-
-struct sigcontext {
-	unsigned long  sc_mask;		/* old sigmask */
-	unsigned long  sc_usp;		/* old user stack pointer */
-	unsigned long  sc_er0;
-	unsigned long  sc_er1;
-	unsigned long  sc_er2;
-	unsigned long  sc_er3;
-	unsigned long  sc_er4;
-	unsigned long  sc_er5;
-	unsigned long  sc_er6;
-	unsigned short sc_ccr;
-	unsigned long  sc_pc;
-};
-
-#endif

arch/h8300/include/uapi/asm/signal.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI_H8300_SIGNAL_H
-#define _UAPI_H8300_SIGNAL_H
-
-#include <linux/types.h>
-
-/* Avoid too many header ordering problems.  */
-struct siginfo;
-
-#ifndef __KERNEL__
-/* Here we must cater to libcs that poke about in kernel headers.  */
-
-#define NSIG		32
-typedef unsigned long sigset_t;
-
-#endif /* __KERNEL__ */
-
-#define SIGHUP		 1
-#define SIGINT		 2
-#define SIGQUIT		 3
-#define SIGILL		 4
-#define SIGTRAP		 5
-#define SIGABRT		 6
-#define SIGIOT		 6
-#define SIGBUS		 7
-#define SIGFPE		 8
-#define SIGKILL		 9
-#define SIGUSR1		10
-#define SIGSEGV		11
-#define SIGUSR2		12
-#define SIGPIPE		13
-#define SIGALRM		14
-#define SIGTERM		15
-#define SIGSTKFLT	16
-#define SIGCHLD		17
-#define SIGCONT		18
-#define SIGSTOP		19
-#define SIGTSTP		20
-#define SIGTTIN		21
-#define SIGTTOU		22
-#define SIGURG		23
-#define SIGXCPU		24
-#define SIGXFSZ		25
-#define SIGVTALRM	26
-#define SIGPROF		27
-#define SIGWINCH	28
-#define SIGIO		29
-#define SIGPOLL		SIGIO
-/*
-#define SIGLOST		29
-*/
-#define SIGPWR		30
-#define SIGSYS		31
-#define	SIGUNUSED	31
-
-/* These should not be considered constants from userland.  */
-#define SIGRTMIN	32
-#define SIGRTMAX	_NSIG
-
-#define SA_RESTORER	0x04000000
-
-#define MINSIGSTKSZ	2048
-#define SIGSTKSZ	8192
-
-#include <asm-generic/signal-defs.h>
-
-#ifndef __KERNEL__
-/* Here we must cater to libcs that poke about in kernel headers.  */
-
-struct sigaction {
-	union {
-	  __sighandler_t _sa_handler;
-	  void (*_sa_sigaction)(int, struct siginfo *, void *);
-	} _u;
-	sigset_t sa_mask;
-	unsigned long sa_flags;
-	void (*sa_restorer)(void);
-};
-
-#define sa_handler	_u._sa_handler
-#define sa_sigaction	_u._sa_sigaction
-
-#endif /* __KERNEL__ */
-
-typedef struct sigaltstack {
-	void *ss_sp;
-	int ss_flags;
-	__kernel_size_t ss_size;
-} stack_t;
-
-
-#endif /* _UAPI_H8300_SIGNAL_H */

arch/h8300/include/uapi/asm/unistd.h

···
-#define __ARCH_NOMMU
-
-#define __ARCH_WANT_RENAMEAT
-#define __ARCH_WANT_STAT64
-#define __ARCH_WANT_SET_GET_RLIMIT
-#define __ARCH_WANT_TIME32_SYSCALLS
-
-#include <asm-generic/unistd.h>

arch/h8300/kernel/.gitignore

···
-# SPDX-License-Identifier: GPL-2.0-only
-vmlinux.lds

arch/h8300/kernel/Makefile

···
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for the linux kernel.
-#
-
-extra-y := vmlinux.lds
-
-obj-y := process.o traps.o ptrace.o \
-	 signal.o setup.o syscalls.o \
-	 irq.o entry.o
-
-obj-$(CONFIG_ROMKERNEL) += head_rom.o
-obj-$(CONFIG_RAMKERNEL) += head_ram.o
-
-obj-$(CONFIG_MODULES) += module.o h8300_ksyms.o
-obj-$(CONFIG_H8300H_SIM) += sim-console.o
-obj-$(CONFIG_H8S_SIM) += sim-console.o
-
-obj-$(CONFIG_CPU_H8300H) += ptrace_h.o
-obj-$(CONFIG_CPU_H8S) += ptrace_s.o
-
-obj-$(CONFIG_KGDB) += kgdb.o

arch/h8300/kernel/asm-offsets.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * This program is used to generate definitions needed by
- * assembly language modules.
- *
- * We use the technique used in the OSF Mach kernel code:
- * generate asm statements containing #defines,
- * compile this file to assembler, and then extract the
- * #defines from the assembly-language output.
- */
-
-#include <linux/stddef.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <linux/ptrace.h>
-#include <linux/hardirq.h>
-#include <linux/kbuild.h>
-#include <asm/irq.h>
-#include <asm/ptrace.h>
-
-int main(void)
-{
-	/* offsets into the task struct */
-	OFFSET(TASK_FLAGS, task_struct, flags);
-	OFFSET(TASK_PTRACE, task_struct, ptrace);
-	OFFSET(TASK_BLOCKED, task_struct, blocked);
-	OFFSET(TASK_THREAD, task_struct, thread);
-	OFFSET(TASK_THREAD_INFO, task_struct, stack);
-	OFFSET(TASK_MM, task_struct, mm);
-	OFFSET(TASK_ACTIVE_MM, task_struct, active_mm);
-
-	/* offsets into the irq_cpustat_t struct */
-	DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t,
-						 __softirq_pending));
-
-	/* offsets into the thread struct */
-	OFFSET(THREAD_KSP, thread_struct, ksp);
-	OFFSET(THREAD_USP, thread_struct, usp);
-	OFFSET(THREAD_CCR, thread_struct, ccr);
-
-	/* offsets into the pt_regs struct */
-	DEFINE(LER0,  offsetof(struct pt_regs, er0)      - sizeof(long));
-	DEFINE(LER1,  offsetof(struct pt_regs, er1)      - sizeof(long));
-	DEFINE(LER2,  offsetof(struct pt_regs, er2)      - sizeof(long));
-	DEFINE(LER3,  offsetof(struct pt_regs, er3)      - sizeof(long));
-	DEFINE(LER4,  offsetof(struct pt_regs, er4)      - sizeof(long));
-	DEFINE(LER5,  offsetof(struct pt_regs, er5)      - sizeof(long));
-	DEFINE(LER6,  offsetof(struct pt_regs, er6)      - sizeof(long));
-	DEFINE(LORIG, offsetof(struct pt_regs, orig_er0) - sizeof(long));
-	DEFINE(LSP,   offsetof(struct pt_regs, sp)       - sizeof(long));
-	DEFINE(LCCR,  offsetof(struct pt_regs, ccr)      - sizeof(long));
-	DEFINE(LVEC,  offsetof(struct pt_regs, vector)   - sizeof(long));
-#if defined(CONFIG_CPU_H8S)
-	DEFINE(LEXR,  offsetof(struct pt_regs, exr)      - sizeof(long));
-#endif
-	DEFINE(LRET,  offsetof(struct pt_regs, pc)       - sizeof(long));
-
-	DEFINE(PT_PTRACED, PT_PTRACED);
-
-	/* offsets in thread_info structure */
-	OFFSET(TI_TASK, thread_info, task);
-	OFFSET(TI_FLAGS, thread_info, flags);
-	OFFSET(TI_CPU, thread_info, cpu);
-	OFFSET(TI_PRE, thread_info, preempt_count);
-#ifdef CONFIG_PREEMPTION
-	DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
-#endif
-
-	return 0;
-}

arch/h8300/kernel/entry.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- *
- *  linux/arch/h8300/kernel/entry.S
- *
- *  Yoshinori Sato <[e-mail]>
- *  David McCullough <[e-mail]>
- *
- */
-
-/*
- *  entry.S
- *  include exception/interrupt gateway
- *          system call entry
- */
-
-#include <linux/sys.h>
-#include <asm/unistd.h>
-#include <asm/setup.h>
-#include <asm/linkage.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/errno.h>
-
-#if defined(CONFIG_CPU_H8300H)
-#define USERRET 8
-INTERRUPTS = 64
-	.h8300h
-	.macro	SHLL2 reg
-	shll.l	\reg
-	shll.l	\reg
-	.endm
-	.macro	SHLR2 reg
-	shlr.l	\reg
-	shlr.l	\reg
-	.endm
-	.macro	SAVEREGS
-	mov.l	er0,@-sp
-	mov.l	er1,@-sp
-	mov.l	er2,@-sp
-	mov.l	er3,@-sp
-	.endm
-	.macro	RESTOREREGS
-	mov.l	@sp+,er3
-	mov.l	@sp+,er2
-	.endm
-	.macro	SAVEEXR
-	.endm
-	.macro	RESTOREEXR
-	.endm
-#endif
-#if defined(CONFIG_CPU_H8S)
-#define USERRET 10
-#define USEREXR 8
-INTERRUPTS = 128
-	.h8300s
-	.macro	SHLL2 reg
-	shll.l	#2,\reg
-	.endm
-	.macro	SHLR2 reg
-	shlr.l	#2,\reg
-	.endm
-	.macro	SAVEREGS
-	stm.l	er0-er3,@-sp
-	.endm
-	.macro	RESTOREREGS
-	ldm.l	@sp+,er2-er3
-	.endm
-	.macro	SAVEEXR
-	mov.w	@(USEREXR:16,er0),r1
-	mov.w	r1,@(LEXR-LER3:16,sp)		/* copy EXR */
-	.endm
-	.macro	RESTOREEXR
-	mov.w	@(LEXR-LER1:16,sp),r1		/* restore EXR */
-	mov.b	r1l,r1h
-	mov.w	r1,@(USEREXR:16,er0)
-	.endm
-#endif
-
-
-/* CPU context save/restore macros. */
-
-	.macro	SAVE_ALL
-	mov.l	er0,@-sp
-	stc	ccr,r0l				/* check kernel mode */
-	btst	#4,r0l
-	bne	5f
-
-	/* user mode */
-	mov.l	sp,@_sw_usp
-	mov.l	@sp,er0				/* restore saved er0 */
-	orc	#0x10,ccr			/* switch kernel stack */
-	mov.l	@_sw_ksp,sp
-	sub.l	#(LRET-LORIG),sp		/* allocate LORIG - LRET */
-	SAVEREGS
-	mov.l   @_sw_usp,er0
-	mov.l   @(USERRET:16,er0),er1           /* copy the RET addr */
-	mov.l   er1,@(LRET-LER3:16,sp)
-	SAVEEXR
-
-	mov.l	@(LORIG-LER3:16,sp),er0
-	mov.l	er0,@(LER0-LER3:16,sp)		/* copy ER0 */
-	mov.w	e1,r1				/* e1 highbyte = ccr */
-	and	#0xef,r1h			/* mask mode? flag */
-	bra	6f
-5:
-	/* kernel mode */
-	mov.l	@sp,er0				/* restore saved er0 */
-	subs	#2,sp				/* set dummy ccr */
-	subs	#4,sp				/* set dummp sp */
-	SAVEREGS
-	mov.w	@(LRET-LER3:16,sp),r1		/* copy old ccr */
-6:
-	mov.b	r1h,r1l
-	mov.b	#0,r1h
-	mov.w	r1,@(LCCR-LER3:16,sp)		/* set ccr */
-	mov.l	@_sw_usp,er2
-	mov.l	er2,@(LSP-LER3:16,sp)		/* set usp */
-	mov.l	er6,@-sp			/* syscall arg #6 */
-	mov.l	er5,@-sp			/* syscall arg #5 */
-	mov.l	er4,@-sp			/* syscall arg #4 */
-	.endm					/* r1 = ccr */
-
-	.macro	RESTORE_ALL
-	mov.l	@sp+,er4
-	mov.l	@sp+,er5
-	mov.l	@sp+,er6
-	RESTOREREGS
-	mov.w	@(LCCR-LER1:16,sp),r0		/* check kernel mode */
-	btst	#4,r0l
-	bne	7f
-
-	orc	#0xc0,ccr
-	mov.l	@(LSP-LER1:16,sp),er0
-	mov.l	@(LER0-LER1:16,sp),er1		/* restore ER0 */
-	mov.l	er1,@er0
-	RESTOREEXR
-	mov.w	@(LCCR-LER1:16,sp),r1		/* restore the RET addr */
-	mov.b	r1l,r1h
-	mov.b	@(LRET+1-LER1:16,sp),r1l
-	mov.w	r1,e1
-	mov.w	@(LRET+2-LER1:16,sp),r1
-	mov.l	er1,@(USERRET:16,er0)
-
-	mov.l	@sp+,er1
-	add.l	#(LRET-LER1),sp			/* remove LORIG - LRET */
-	mov.l	sp,@_sw_ksp
-	andc	#0xef,ccr			/* switch to user mode */
-	mov.l	er0,sp
-	bra	8f
-7:
-	mov.l	@sp+,er1
-	add.l	#10,sp
-8:
-	mov.l	@sp+,er0
-	adds	#4,sp				/* remove the sw created LVEC */
-	rte
-	.endm
-
-.globl _system_call
-.globl ret_from_exception
-.globl ret_from_fork
-.globl ret_from_kernel_thread
-.globl ret_from_interrupt
-.globl _interrupt_redirect_table
-.globl _sw_ksp,_sw_usp
-.globl _resume
-.globl _interrupt_entry
-.globl _trace_break
-.globl _nmi
-
-#if defined(CONFIG_ROMKERNEL)
-	.section .int_redirect,"ax"
-_interrupt_redirect_table:
-#if defined(CONFIG_CPU_H8300H)
-	.rept	7
-	.long	0
-	.endr
-#endif
-#if defined(CONFIG_CPU_H8S)
-	.rept	5
-	.long	0
-	.endr
-	jmp	@_trace_break
-	.long	0
-#endif
-
-	jsr	@_interrupt_entry		/* NMI */
-	jmp	@_system_call			/* TRAPA #0 (System call) */
-	.long	0
-#if defined(CONFIG_KGDB)
-	jmp	@_kgdb_trap
-#else
-	.long	0
-#endif
-	jmp	@_trace_break			/* TRAPA #3 (breakpoint) */
-	.rept	INTERRUPTS-12
-	jsr	@_interrupt_entry
-	.endr
-#endif
-#if defined(CONFIG_RAMKERNEL)
-.globl _interrupt_redirect_table
-	.section .bss
-_interrupt_redirect_table:
-	.space	4
-#endif
-
-	.section .text
-	.align	2
-_interrupt_entry:
-	SAVE_ALL
-/* r1l is saved ccr */
-	mov.l	sp,er0
-	add.l	#LVEC,er0
-	btst	#4,r1l
-	bne	1f
-	/* user LVEC */
-	mov.l	@_sw_usp,er0
-	adds	#4,er0
-1:
-	mov.l	@er0,er0			/* LVEC address */
-#if defined(CONFIG_ROMKERNEL)
-	sub.l	#_interrupt_redirect_table,er0
-#endif
-#if defined(CONFIG_RAMKERNEL)
-	mov.l	@_interrupt_redirect_table,er1
-	sub.l	er1,er0
-#endif
-	SHLR2	er0
-	dec.l	#1,er0
-	mov.l	sp,er1
-	subs	#4,er1				/* adjust ret_pc */
-#if defined(CONFIG_CPU_H8S)
-	orc	#7,exr
-#endif
-	jsr	@do_IRQ
-	jmp	@ret_from_interrupt
-
-_system_call:
-	subs	#4,sp				/* dummy LVEC */
-	SAVE_ALL
-	/* er0: syscall nr */
-	andc	#0xbf,ccr
-	mov.l	er0,er4
-
-	/* save top of frame */
-	mov.l	sp,er0
-	jsr	@set_esp0
-	andc	#0x3f,ccr
-	mov.l	sp,er2
-	and.w	#0xe000,r2
-	mov.l	@(TI_FLAGS:16,er2),er2
-	and.w	#_TIF_WORK_SYSCALL_MASK,r2
-	beq	1f
-	mov.l	sp,er0
-	jsr	@do_syscall_trace_enter
-1:
-	cmp.l	#__NR_syscalls,er4
-	bcc	badsys
-	SHLL2	er4
-	mov.l	#_sys_call_table,er0
-	add.l	er4,er0
-	mov.l	@er0,er4
-	beq	ret_from_exception:16
-	mov.l	@(LER1:16,sp),er0
-	mov.l	@(LER2:16,sp),er1
-	mov.l	@(LER3:16,sp),er2
-	jsr	@er4
-	mov.l	er0,@(LER0:16,sp)		/* save the return value */
-	mov.l	sp,er2
-	and.w	#0xe000,r2
-	mov.l	@(TI_FLAGS:16,er2),er2
-	and.w	#_TIF_WORK_SYSCALL_MASK,r2
-	beq	2f
-	mov.l	sp,er0
-	jsr	@do_syscall_trace_leave
-2:
-	orc	#0xc0,ccr
-	bra	resume_userspace
-
-badsys:
-	mov.l	#-ENOSYS,er0
-	mov.l	er0,@(LER0:16,sp)
-	bra	resume_userspace
-
-#if !defined(CONFIG_PREEMPTION)
-#define resume_kernel restore_all
-#endif
-
-ret_from_exception:
-#if defined(CONFIG_PREEMPTION)
-	orc	#0xc0,ccr
-#endif
-ret_from_interrupt:
-	mov.b	@(LCCR+1:16,sp),r0l
-	btst	#4,r0l
-	bne	resume_kernel:16	/* return from kernel */
-resume_userspace:
-	andc	#0xbf,ccr
-	mov.l	sp,er4
-	and.w	#0xe000,r4		/* er4 <- current thread info */
-	mov.l	@(TI_FLAGS:16,er4),er1
-	and.l	#_TIF_WORK_MASK,er1
-	beq	restore_all:8
-work_pending:
-	btst	#TIF_NEED_RESCHED,r1l
-	bne	work_resched:8
-	/* work notifysig */
-	mov.l	sp,er0
-	subs	#4,er0			/* er0: pt_regs */
-	jsr	@do_notify_resume
-	bra	resume_userspace:8
-work_resched:
-	mov.l	sp,er0
-	jsr	@set_esp0
-	jsr	@schedule
-	bra	resume_userspace:8
-restore_all:
-	RESTORE_ALL			/* Does RTE */
-
-#if defined(CONFIG_PREEMPTION)
-resume_kernel:
-	mov.l	@(TI_PRE_COUNT:16,er4),er0
-	bne	restore_all:8
-need_resched:
-	mov.l	@(TI_FLAGS:16,er4),er0
-	btst	#TIF_NEED_RESCHED,r0l
-	beq	restore_all:8
-	mov.b	@(LCCR+1:16,sp),r0l	/* Interrupt Enabled? */
-	bmi	restore_all:8
-	mov.l	sp,er0
-	jsr	@set_esp0
-	jsr	@preempt_schedule_irq
-	bra	need_resched:8
-#endif
-
-ret_from_fork:
-	mov.l	er2,er0
-	jsr	@schedule_tail
-	jmp	@ret_from_exception
-
-ret_from_kernel_thread:
-	mov.l	er2,er0
-	jsr	@schedule_tail
-	mov.l	@(LER4:16,sp),er0
-	mov.l	@(LER5:16,sp),er1
-	jsr	@er1
-	jmp	@ret_from_exception
-
-_resume:
-	/*
-	 * Beware - when entering resume, offset of tss is in d1,
-	 * prev (the current task) is in a0, next (the new task)
-	 * is in a1 and d2.b is non-zero if the mm structure is
-	 * shared between the tasks, so don't change these
-	 * registers until their contents are no longer needed.
-	 */
-
-	/* save sr */
-	sub.w	r3,r3
-	stc	ccr,r3l
-	mov.w	r3,@(THREAD_CCR+2:16,er0)
-
-	/* disable interrupts */
-	orc	#0xc0,ccr
-	mov.l	@_sw_usp,er3
-	mov.l	er3,@(THREAD_USP:16,er0)
-	mov.l	sp,@(THREAD_KSP:16,er0)
-
-	/* Skip address space switching if they are the same. */
-	/* FIXME: what did we hack out of here, this does nothing! */
-
-	mov.l	@(THREAD_USP:16,er1),er0
-	mov.l	er0,@_sw_usp
-	mov.l	@(THREAD_KSP:16,er1),sp
-
-	/* restore status register */
-	mov.w	@(THREAD_CCR+2:16,er1),r3
-
-	ldc	r3l,ccr
-	rts
-
-_trace_break:
-	subs	#4,sp
-	SAVE_ALL
-	sub.l	er1,er1
-	dec.l	#1,er1
-	mov.l	er1,@(LORIG,sp)
-	mov.l	sp,er0
-	jsr	@set_esp0
-	mov.l	@_sw_usp,er0
-	mov.l	@er0,er1
-	mov.w	@(-2:16,er1),r2
-	cmp.w	#0x5730,r2
-	beq	1f
-	subs	#2,er1
-	mov.l	er1,@er0
-1:
-	and.w	#0xff,e1
-	mov.l	er1,er0
-	jsr	@trace_trap
-	jmp	@ret_from_exception
-
-_nmi:
-	subs	#4, sp
-	mov.l	er0, @-sp
-	mov.l	@_interrupt_redirect_table, er0
-	add.l	#8*4, er0
-	mov.l	er0, @(4,sp)
-	mov.l	@sp+, er0
-	jmp	@_interrupt_entry
-
-#if defined(CONFIG_KGDB)
-_kgdb_trap:
-	subs	#4,sp
-	SAVE_ALL
-	mov.l	sp,er0
-	add.l	#LRET,er0
-	mov.l	er0,@(LSP,sp)
-	jsr	@set_esp0
-	mov.l	sp,er0
-	subs	#4,er0
-	jsr	@h8300_kgdb_trap
-	jmp	@ret_from_exception
-#endif
-
-	.section	.bss
-_sw_ksp:
-	.space	4
-_sw_usp:
-	.space	4
-
-	.end

arch/h8300/kernel/h8300_ksyms.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/module.h>
-#include <linux/linkage.h>
-
-/*
- * libgcc functions - functions that are used internally by the
- * compiler...  (prototypes are not correct though, but that
- * doesn't really matter since they're not versioned).
- */
-asmlinkage long __ucmpdi2(long long, long long);
-asmlinkage long long __ashldi3(long long, int);
-asmlinkage long long __ashrdi3(long long, int);
-asmlinkage long long __lshrdi3(long long, int);
-asmlinkage long __divsi3(long, long);
-asmlinkage long __modsi3(long, long);
-asmlinkage unsigned long __umodsi3(unsigned long, unsigned long);
-asmlinkage long long __muldi3(long long, long long);
-asmlinkage long __mulsi3(long, long);
-asmlinkage long __udivsi3(long, long);
-asmlinkage void *memcpy(void *, const void *, size_t);
-asmlinkage void *memset(void *, int, size_t);
-
-	/* gcc lib functions */
-EXPORT_SYMBOL(__ucmpdi2);
-EXPORT_SYMBOL(__ashldi3);
-EXPORT_SYMBOL(__ashrdi3);
-EXPORT_SYMBOL(__lshrdi3);
-EXPORT_SYMBOL(__divsi3);
-EXPORT_SYMBOL(__modsi3);
-EXPORT_SYMBOL(__umodsi3);
-EXPORT_SYMBOL(__muldi3);
-EXPORT_SYMBOL(__mulsi3);
-EXPORT_SYMBOL(__udivsi3);
-EXPORT_SYMBOL(memcpy);
-EXPORT_SYMBOL(memset);

arch/h8300/kernel/head_ram.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#include <linux/sys.h>
-#include <linux/init.h>
-#include <asm/unistd.h>
-#include <asm/setup.h>
-#include <asm/linkage.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/errno.h>
-
-#if defined(CONFIG_CPU_H8300H)
-	.h8300h
-#define SYSCR 0xfee012
-#define IRAMTOP 0xffff20
-#endif
-#if defined(CONFIG_CPU_H8S)
-	.h8300s
-#define INTCR 0xffff31
-#define IRAMTOP 0xffc000
-#endif
-
-	__HEAD
-	.global	_start
-_start:
-	mov.l	#IRAMTOP,sp
-	/* .bss clear */
-	mov.l	#_sbss,er5
-	mov.l	#_ebss,er4
-	sub.l	er5,er4
-	shlr	er4
-	shlr	er4
-	sub.l	er2,er2
-1:
-	mov.l	er2,@er5
-	adds	#4,er5
-	dec.l	#1,er4
-	bne	1b
-	jsr	@h8300_fdt_init
-
-	/* linux kernel start */
-#if defined(CONFIG_CPU_H8300H)
-	ldc	#0xd0,ccr	/* running kernel */
-	mov.l	#SYSCR,er0
-	bclr	#3,@er0
-#endif
-#if defined(CONFIG_CPU_H8S)
-	ldc	#0x07,exr
-	bclr	#4,@INTCR:8
-	bset	#5,@INTCR:8	/* Interrupt mode 2 */
-	ldc	#0x90,ccr	/* running kernel */
-#endif
-	mov.l	#init_thread_union,sp
-	add.l	#0x2000,sp
-	jsr	@start_kernel
-
-1:
-	bra	1b
-
-	.end

arch/h8300/kernel/head_rom.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <linux/init.h>
-#include <asm/thread_info.h>
-
-#if defined(CONFIG_CPU_H8300H)
-	.h8300h
-#define SYSCR 0xfee012
-#define IRAMTOP 0xffff20
-#define NR_INT 64
-#endif
-#if defined(CONFIG_CPU_H8S)
-	.h8300s
-#define INTCR 0xffff31
-#define IRAMTOP 0xffc000
-#define NR_INT 128
-#endif
-
-	__HEAD
-	.global	_start
-_start:
-	mov.l	#IRAMTOP,sp
-#if !defined(CONFIG_H8300H_SIM) && \
-    !defined(CONFIG_H8S_SIM)
-	jsr	@lowlevel_init
-
-	/* copy .data */
-	mov.l	#_begin_data,er5
-	mov.l	#_sdata,er6
-	mov.l	#_edata,er4
-	sub.l	er6,er4
-	shlr.l	er4
-	shlr.l	er4
-1:
-	mov.l	@er5+,er0
-	mov.l	er0,@er6
-	adds	#4,er6
-	dec.l	#1,er4
-	bne	1b
-	/* .bss clear */
-	mov.l	#_sbss,er5
-	mov.l	#_ebss,er4
-	sub.l	er5,er4
-	shlr	er4
-	shlr	er4
-	sub.l	er0,er0
-1:
-	mov.l	er0,@er5
-	adds	#4,er5
-	dec.l	#1,er4
-	bne	1b
-#else
-	/* get cmdline from gdb */
-	jsr	@0xcc
-	;; er0 - argc
-	;; er1 - argv
-	mov.l	#command_line,er3
-	adds	#4,er1
-	dec.l	#1,er0
-	beq	4f
-1:
-	mov.l	@er1+,er2
-2:
-	mov.b	@er2+,r4l
-	beq	3f
-	mov.b	r4l,@er3
-	adds	#1,er3
-	bra	2b
-3:
-	mov.b	#' ',r4l
-	mov.b	r4l,@er3
-	adds	#1,er3
-	dec.l	#1,er0
-	bne	1b
-	subs	#1,er3
-	mov.b	#0,r4l
-	mov.b	r4l,@er3
-4:
-#endif
-	sub.l	er0,er0
-	jsr	@h8300_fdt_init
-	/* linux kernel start */
-#if defined(CONFIG_CPU_H8300H)
-	ldc	#0xd0,ccr	/* running kernel */
-	mov.l	#SYSCR,er0
-	bclr	#3,@er0
-#endif
-#if defined(CONFIG_CPU_H8S)
-	ldc	#0x07,exr
-	bclr	#4,@INTCR:8
-	bset	#5,@INTCR:8	/* Interrupt mode 2 */
-	ldc	#0x90,ccr	/* running kernel */
-#endif
-	mov.l	#init_thread_union,sp
-	add.l	#0x2000,sp
-	jsr	@start_kernel
-
-1:
-	bra	1b
-
-#if defined(CONFIG_ROMKERNEL)
-	/* interrupt vector */
-	.section .vectors,"ax"
-	.long	_start
-	.long	_start
-vector	=	2
-	.rept	NR_INT - 2
-	.long	_interrupt_redirect_table+vector*4
-vector	=	vector + 1
-	.endr
-#endif
-	.end

arch/h8300/kernel/irq.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/h8300/kernel/irq.c
- *
- * Copyright 2014-2015 Yoshinori Sato <[e-mail]>
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/irqchip.h>
-#include <linux/irqdomain.h>
-#include <linux/of_irq.h>
-#include <asm/traps.h>
-
-#ifdef CONFIG_RAMKERNEL
-typedef void (*h8300_vector)(void);
-
-static const h8300_vector __initconst trap_table[] = {
-	0, 0, 0, 0,
-	_trace_break,
-	0, 0,
-	_nmi,
-	_system_call,
-	0, 0,
-	_trace_break,
-};
-
-static unsigned long __init *get_vector_address(void)
-{
-	unsigned long *rom_vector = CPU_VECTOR;
-	unsigned long base, tmp;
-	int vec_no;
-
-	base = rom_vector[EXT_IRQ0] & ADDR_MASK;
-
-	/* check romvector format */
-	for (vec_no = EXT_IRQ0 + 1; vec_no <= EXT_IRQ0+EXT_IRQS; vec_no++) {
-		if ((base+(vec_no - EXT_IRQ0)*4) !=
-		    (rom_vector[vec_no] & ADDR_MASK))
-			return NULL;
-	}
-
-	/* ramvector base address */
-	base -= EXT_IRQ0*4;
-
-	/* writerble? */
-	tmp = ~(*(volatile unsigned long *)base);
-	(*(volatile unsigned long *)base) = tmp;
-	if ((*(volatile unsigned long *)base) != tmp)
-		return NULL;
-	return (unsigned long *)base;
-}
-
-static void __init setup_vector(void)
-{
-	int i;
-	unsigned long *ramvec, *ramvec_p;
-	const h8300_vector *trap_entry;
-
-	ramvec = get_vector_address();
-	if (ramvec == NULL)
-		panic("interrupt vector serup failed.");
-	else
-		pr_debug("virtual vector at 0x%p\n", ramvec);
-
-	/* create redirect table */
-	ramvec_p = ramvec;
-	trap_entry = trap_table;
-	for (i = 0; i < NR_IRQS; i++) {
-		if (i < 12) {
-			if (*trap_entry)
-				*ramvec_p = VECTOR(*trap_entry);
-			ramvec_p++;
-			trap_entry++;
-		} else
-			*ramvec_p++ = REDIRECT(_interrupt_entry);
-	}
-	_interrupt_redirect_table = ramvec;
-}
-#else
-void setup_vector(void)
-{
-	/* noting do */
-}
-#endif
-
-void __init init_IRQ(void)
-{
-	setup_vector();
-	irqchip_init();
-}
-
-asmlinkage void do_IRQ(int irq)
-{
-	irq_enter();
-	generic_handle_irq(irq);
-	irq_exit();
-}

arch/h8300/kernel/kgdb.c

···
-/*
- * H8/300 KGDB support
- *
- * Copyright (C) 2015 Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#include <linux/ptrace.h>
-#include <linux/kgdb.h>
-#include <linux/kdebug.h>
-#include <linux/io.h>
-
-struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = {
-	{ "er0", GDB_SIZEOF_REG, offsetof(struct pt_regs, er0) },
-	{ "er1", GDB_SIZEOF_REG, offsetof(struct pt_regs, er1) },
-	{ "er2", GDB_SIZEOF_REG, offsetof(struct pt_regs, er2) },
-	{ "er3", GDB_SIZEOF_REG, offsetof(struct pt_regs, er3) },
-	{ "er4", GDB_SIZEOF_REG, offsetof(struct pt_regs, er4) },
-	{ "er5", GDB_SIZEOF_REG, offsetof(struct pt_regs, er5) },
-	{ "er6", GDB_SIZEOF_REG, offsetof(struct pt_regs, er6) },
-	{ "sp", GDB_SIZEOF_REG, offsetof(struct pt_regs, sp) },
-	{ "ccr", GDB_SIZEOF_REG, offsetof(struct pt_regs, ccr) },
-	{ "pc", GDB_SIZEOF_REG, offsetof(struct pt_regs, pc) },
-	{ "cycles", GDB_SIZEOF_REG, -1 },
-#if defined(CONFIG_CPU_H8S)
-	{ "exr", GDB_SIZEOF_REG, offsetof(struct pt_regs, exr) },
-#endif
-	{ "tick", GDB_SIZEOF_REG, -1 },
-	{ "inst", GDB_SIZEOF_REG, -1 },
-};
-
-char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs)
-{
-	if (regno >= DBG_MAX_REG_NUM || regno < 0)
-		return NULL;
-
-	switch (regno) {
-	case GDB_CCR:
-#if defined(CONFIG_CPU_H8S)
-	case GDB_EXR:
-#endif
-		*(u32 *)mem = *(u16 *)((void *)regs +
-				       dbg_reg_def[regno].offset);
-		break;
-	default:
-		if (dbg_reg_def[regno].offset >= 0)
-			memcpy(mem, (void *)regs + dbg_reg_def[regno].offset,
-			       dbg_reg_def[regno].size);
-		else
-			memset(mem, 0, dbg_reg_def[regno].size);
-		break;
-	}
-	return dbg_reg_def[regno].name;
-}
-
-int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)
-{
-	if (regno >= DBG_MAX_REG_NUM || regno < 0)
-		return -EINVAL;
-
-	switch (regno) {
-	case GDB_CCR:
-#if defined(CONFIG_CPU_H8S)
-	case GDB_EXR:
-#endif
-		*(u16 *)((void *)regs +
-			 dbg_reg_def[regno].offset) = *(u32 *)mem;
-		break;
-	default:
-		memcpy((void *)regs + dbg_reg_def[regno].offset, mem,
-		       dbg_reg_def[regno].size);
-	}
-	return 0;
-}
-
-asmlinkage void h8300_kgdb_trap(struct pt_regs *regs)
-{
-	regs->pc &= 0x00ffffff;
-	if (kgdb_handle_exception(10, SIGTRAP, 0, regs))
-		return;
-	if (*(u16 *)(regs->pc) == *(u16 *)&arch_kgdb_ops.gdb_bpt_instr)
-		regs->pc += BREAK_INSTR_SIZE;
-	regs->pc |= regs->ccr << 24;
-}
-
-void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
-{
-	memset((char *)gdb_regs, 0, NUMREGBYTES);
-	gdb_regs[GDB_SP] = p->thread.ksp;
-	gdb_regs[GDB_PC] = KSTK_EIP(p);
-}
-
-void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc)
-{
-	regs->pc = pc;
-}
-
-int kgdb_arch_handle_exception(int vector, int signo, int err_code,
-				char *remcom_in_buffer, char *remcom_out_buffer,
-				struct pt_regs *regs)
-{
-	char *ptr;
-	unsigned long addr;
-
-	switch (remcom_in_buffer[0]) {
-	case 's':
-	case 'c':
-		/* handle the optional parameters */
-		ptr = &remcom_in_buffer[1];
-		if (kgdb_hex2long(&ptr, &addr))
-			regs->pc = addr;
-
-		return 0;
-	}
-
-	return -1; /* this means that we do not want to exit from the handler */
-}
-
-int kgdb_arch_init(void)
-{
-	return 0;
-}
-
-void kgdb_arch_exit(void)
-{
-	/* Nothing to do */
-}
-
-const struct kgdb_arch arch_kgdb_ops = {
-	/* Breakpoint instruction: trapa #2 */
-	.gdb_bpt_instr = { 0x57, 0x20 },
-};

arch/h8300/kernel/module.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-
-int apply_relocate_add(Elf32_Shdr *sechdrs,
-		       const char *strtab,
-		       unsigned int symindex,
-		       unsigned int relsec,
-		       struct module *me)
-{
-	unsigned int i;
-	Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
-
-	pr_debug("Applying relocate section %u to %u\n", relsec,
-	       sechdrs[relsec].sh_info);
-	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
-		/* This is where to make the change */
-		uint32_t *loc =
-			(uint32_t *)(sechdrs[sechdrs[relsec].sh_info].sh_addr
-					     + rela[i].r_offset);
-		/* This is the symbol it is referring to.  Note that all
-		   undefined symbols have been resolved.  */
-		Elf32_Sym *sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
-			+ ELF32_R_SYM(rela[i].r_info);
-		uint32_t v = sym->st_value + rela[i].r_addend;
-
-		switch (ELF32_R_TYPE(rela[i].r_info)) {
-		case R_H8_DIR24R8:
-			loc = (uint32_t *)((uint32_t)loc - 1);
-			*loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
-			break;
-		case R_H8_DIR24A8:
-			if (ELF32_R_SYM(rela[i].r_info))
-				*loc += v;
-			break;
-		case R_H8_DIR32:
-		case R_H8_DIR32A16:
-			*loc += v;
-			break;
-		case R_H8_PCREL16:
-			v -= (unsigned long)loc + 2;
-			if ((Elf32_Sword)v > 0x7fff ||
-			    (Elf32_Sword)v < -(Elf32_Sword)0x8000)
-				goto overflow;
-			else
-				*(unsigned short *)loc = v;
-			break;
-		case R_H8_PCREL8:
-			v -= (unsigned long)loc + 1;
-			if ((Elf32_Sword)v > 0x7f ||
-			    (Elf32_Sword)v < -(Elf32_Sword)0x80)
-				goto overflow;
-			else
-				*(unsigned char *)loc = v;
-			break;
-		default:
-			pr_err("module %s: Unknown relocation: %u\n",
-			       me->name, ELF32_R_TYPE(rela[i].r_info));
-			return -ENOEXEC;
-		}
-	}
-	return 0;
- overflow:
-	pr_err("module %s: relocation offset overflow: %08x\n",
-	       me->name, rela[i].r_offset);
-	return -ENOEXEC;
-}

arch/h8300/kernel/process.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/h8300/kernel/process.c
- *
- * Yoshinori Sato <[e-mail]>
- *
- *  Based on:
- *
- *  linux/arch/m68knommu/kernel/process.c
- *
- *  Copyright (C) 1998  D. Jeff Dionne <[e-mail]>,
- *                      Kenneth Albanowski <[e-mail]>,
- *                      The Silver Hammer Group, Ltd.
- *
- *  linux/arch/m68k/kernel/process.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- *
- *  68060 fixes by Jesper Skov
- */
-
-/*
- * This file handles the architecture-dependent parts of process handling..
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task.h>
-#include <linux/sched/task_stack.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/interrupt.h>
-#include <linux/reboot.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <linux/rcupdate.h>
-
-#include <linux/uaccess.h>
-#include <asm/traps.h>
-#include <asm/setup.h>
-
-void (*pm_power_off)(void) = NULL;
-EXPORT_SYMBOL(pm_power_off);
-
-asmlinkage void ret_from_fork(void);
-asmlinkage void ret_from_kernel_thread(void);
-
-/*
- * The idle loop on an H8/300..
- */
-void arch_cpu_idle(void)
-{
-	raw_local_irq_enable();
-	__asm__("sleep");
-}
-
-void machine_restart(char *__unused)
-{
-	local_irq_disable();
-	__asm__("jmp @@0");
-}
-
-void machine_halt(void)
-{
-	local_irq_disable();
-	__asm__("sleep");
-	for (;;)
-		;
-}
-
-void machine_power_off(void)
-{
-	local_irq_disable();
-	__asm__("sleep");
-	for (;;)
-		;
-}
-
-void show_regs(struct pt_regs *regs)
-{
-	show_regs_print_info(KERN_DEFAULT);
-
-	pr_notice("\n");
-	pr_notice("PC: %08lx  Status: %02x\n",
-	       regs->pc, regs->ccr);
-	pr_notice("ORIG_ER0: %08lx ER0: %08lx ER1: %08lx\n",
-	       regs->orig_er0, regs->er0, regs->er1);
-	pr_notice("ER2: %08lx ER3: %08lx ER4: %08lx ER5: %08lx\n",
-	       regs->er2, regs->er3, regs->er4, regs->er5);
-	pr_notice("ER6' %08lx ", regs->er6);
-	if (user_mode(regs))
-		printk("USP: %08lx\n", rdusp());
-	else
-		printk("\n");
-}
-
-void flush_thread(void)
-{
-}
-
-int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long topstk, struct task_struct *p, unsigned long tls)
-{
-	struct pt_regs *childregs;
-
-	childregs = (struct pt_regs *) (THREAD_SIZE + task_stack_page(p)) - 1;
-
-	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
-		memset(childregs, 0, sizeof(struct pt_regs));
-		childregs->retpc = (unsigned long) ret_from_kernel_thread;
-		childregs->er4 = topstk; /* arg */
-		childregs->er5 = usp; /* fn */
-	}  else {
-		*childregs = *current_pt_regs();
-		childregs->er0 = 0;
-		childregs->retpc = (unsigned long) ret_from_fork;
-		p->thread.usp = usp ?: rdusp();
-	}
-	p->thread.ksp = (unsigned long)childregs;
-
-	return 0;
-}
-
-unsigned long __get_wchan(struct task_struct *p)
-{
-	unsigned long fp, pc;
-	unsigned long stack_page;
-	int count = 0;
-
-	stack_page = (unsigned long)p;
-	fp = ((struct pt_regs *)p->thread.ksp)->er6;
-	do {
-		if (fp < stack_page+sizeof(struct thread_info) ||
-		    fp >= 8184+stack_page)
-			return 0;
-		pc = ((unsigned long *)fp)[1];
-		if (!in_sched_functions(pc))
-			return pc;
-		fp = *(unsigned long *) fp;
-	} while (count++ < 16);
-	return 0;
-}
-
-/* generic sys_clone is not enough registers */
-asmlinkage int sys_clone(unsigned long __user *args)
-{
-	unsigned long clone_flags;
-	unsigned long  newsp;
-	uintptr_t parent_tidptr;
-	uintptr_t child_tidptr;
-	struct kernel_clone_args kargs = {};
-
-	get_user(clone_flags, &args[0]);
-	get_user(newsp, &args[1]);
-	get_user(parent_tidptr, &args[2]);
-	get_user(child_tidptr, &args[3]);
-
-	kargs.flags		= (lower_32_bits(clone_flags) & ~CSIGNAL);
-	kargs.pidfd		= (int __user *)parent_tidptr;
-	kargs.child_tid		= (int __user *)child_tidptr;
-	kargs.parent_tid	= (int __user *)parent_tidptr;
-	kargs.exit_signal	= (lower_32_bits(clone_flags) & CSIGNAL);
-	kargs.stack		= newsp;
-
-	return kernel_clone(&kargs);
-}

arch/h8300/kernel/ptrace.c

···
-/*
- *  linux/arch/h8300/kernel/ptrace.c
- *
- *  Copyright 2015 Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file COPYING in the main directory of
- * this archive for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/audit.h>
-#include <linux/regset.h>
-#include <linux/elf.h>
-
-#define CCR_MASK 0x6f    /* mode/imask not set */
-#define EXR_MASK 0x80    /* modify only T */
-
-#define PT_REG(r) offsetof(struct pt_regs, r)
-
-extern void user_disable_single_step(struct task_struct *child);
-
-/* Mapping from PT_xxx to the stack offset at which the register is
-   saved.  Notice that usp has no stack-slot and needs to be treated
-   specially (see get_reg/put_reg below). */
-static const int register_offset[] = {
-	PT_REG(er1), PT_REG(er2), PT_REG(er3), PT_REG(er4),
-	PT_REG(er5), PT_REG(er6), PT_REG(er0), -1,
-	PT_REG(orig_er0), PT_REG(ccr), PT_REG(pc),
-#if defined(CONFIG_CPU_H8S)
-	PT_REG(exr),
-#endif
-};
-
-/* read register */
-long h8300_get_reg(struct task_struct *task, int regno)
-{
-	switch (regno) {
-	case PT_USP:
-		return task->thread.usp + sizeof(long)*2;
-	case PT_CCR:
-	case PT_EXR:
-	    return *(unsigned short *)(task->thread.esp0 +
-				       register_offset[regno]);
-	default:
-	    return *(unsigned long *)(task->thread.esp0 +
-				      register_offset[regno]);
-	}
-}
-
-int h8300_put_reg(struct task_struct *task, int regno, unsigned long data)
-{
-	unsigned short oldccr;
-	unsigned short oldexr;
-
-	switch (regno) {
-	case PT_USP:
-		task->thread.usp = data - sizeof(long)*2;
-	case PT_CCR:
-		oldccr = *(unsigned short *)(task->thread.esp0 +
-					     register_offset[regno]);
-		oldccr &= ~CCR_MASK;
-		data &= CCR_MASK;
-		data |= oldccr;
-		*(unsigned short *)(task->thread.esp0 +
-				    register_offset[regno]) = data;
-		break;
-	case PT_EXR:
-		oldexr = *(unsigned short *)(task->thread.esp0 +
-					     register_offset[regno]);
-		oldccr &= ~EXR_MASK;
-		data &= EXR_MASK;
-		data |= oldexr;
-		*(unsigned short *)(task->thread.esp0 +
-				    register_offset[regno]) = data;
-		break;
-	default:
-		*(unsigned long *)(task->thread.esp0 +
-				   register_offset[regno]) = data;
-		break;
-	}
-	return 0;
-}
-
-static int regs_get(struct task_struct *target,
-		    const struct user_regset *regset,
-		    struct membuf to)
-{
-	int r;
-
-	BUILD_BUG_ON(sizeof(struct user_regs_struct) % sizeof(long) != 0);
-	for (r = 0; r < ELF_NGREG; r++)
-		membuf_store(&to, h8300_get_reg(target, r));
-
-	return 0;
-}
-
-static int regs_set(struct task_struct *target,
-		    const struct user_regset *regset,
-		    unsigned int pos, unsigned int count,
-		    const void *kbuf, const void __user *ubuf)
-{
-	int r;
-	int ret;
-	struct user_regs_struct regs;
-	long *reg;
-
-	/* build user regs in buffer */
-	BUILD_BUG_ON(sizeof(regs) % sizeof(long) != 0);
-	for (reg = (long *)&regs, r = 0; r < sizeof(regs) / sizeof(long); r++)
-		*reg++ = h8300_get_reg(target, r);
-
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 &regs, 0, sizeof(regs));
-	if (ret)
-		return ret;
-
-	/* write back to pt_regs */
-	for (reg = (long *)&regs, r = 0; r < sizeof(regs) / sizeof(long); r++)
-		h8300_put_reg(target, r, *reg++);
-	return 0;
-}
-
-enum h8300_regset {
-	REGSET_GENERAL,
-};
-
-static const struct user_regset h8300_regsets[] = {
-	[REGSET_GENERAL] = {
-		.core_note_type	= NT_PRSTATUS,
-		.n		= ELF_NGREG,
-		.size		= sizeof(long),
-		.align		= sizeof(long),
-		.regset_get		= regs_get,
-		.set		= regs_set,
-	},
-};
-
-static const struct user_regset_view user_h8300_native_view = {
-	.name = "h8300",
-	.e_machine = EM_H8_300,
-	.regsets = h8300_regsets,
-	.n = ARRAY_SIZE(h8300_regsets),
-};
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
-	return &user_h8300_native_view;
-}
-
-void ptrace_disable(struct task_struct *child)
-{
-	user_disable_single_step(child);
-}
-
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	int ret;
-
-	switch (request) {
-	default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-	return ret;
-}
-
-asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
-{
-	long ret = 0;
-
-	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
-	    ptrace_report_syscall_entry(regs))
-		/*
-		 * Tracing decided this syscall should not happen.
-		 * We'll return a bogus call number to get an ENOSYS
-		 * error, but leave the original number in regs->regs[0].
-		 */
-		ret = -1L;
-
-	audit_syscall_entry(regs->er1, regs->er2, regs->er3,
-			    regs->er4, regs->er5);
-
-	return ret ?: regs->er0;
-}
-
-asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
-{
-	int step;
-
-	audit_syscall_exit(regs);
-
-	step = test_thread_flag(TIF_SINGLESTEP);
-	if (step || test_thread_flag(TIF_SYSCALL_TRACE))
-		ptrace_report_syscall_exit(regs, step);
-}

arch/h8300/kernel/ptrace_h.c

···
-/*
- *    ptrace cpu depend helper functions
- *
- *  Copyright 2003, 2015 Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file COPYING in the main directory of
- * this archive for more details.
- */
-
-#include <linux/linkage.h>
-#include <linux/sched/signal.h>
-#include <asm/ptrace.h>
-
-#define BREAKINST 0x5730 /* trapa #3 */
-
-/* disable singlestep */
-void user_disable_single_step(struct task_struct *child)
-{
-	if ((long)child->thread.breakinfo.addr != -1L) {
-		*(child->thread.breakinfo.addr) = child->thread.breakinfo.inst;
-		child->thread.breakinfo.addr = (unsigned short *)-1L;
-	}
-}
-
-/* calculate next pc */
-enum jump_type {none,	 /* normal instruction */
-		jabs,	 /* absolute address jump */
-		ind,	 /* indirect address jump */
-		ret,	 /* return to subrutine */
-		reg,	 /* register indexed jump */
-		relb,	 /* pc relative jump (byte offset) */
-		relw,	 /* pc relative jump (word offset) */
-	       };
-
-/* opcode decode table define
-   ptn: opcode pattern
-   msk: opcode bitmask
-   len: instruction length (<0 next table index)
-   jmp: jump operation mode */
-struct optable {
-	unsigned char bitpattern;
-	unsigned char bitmask;
-	signed char length;
-	signed char type;
-} __packed __aligned(1);
-
-#define OPTABLE(ptn, msk, len, jmp)	\
-	{				\
-		.bitpattern = ptn,	\
-		.bitmask    = msk,	\
-		.length	    = len,	\
-		.type	    = jmp,	\
-	}
-
-static const struct optable optable_0[] = {
-	OPTABLE(0x00, 0xff,  1, none), /* 0x00 */
-	OPTABLE(0x01, 0xff, -1, none), /* 0x01 */
-	OPTABLE(0x02, 0xfe,  1, none), /* 0x02-0x03 */
-	OPTABLE(0x04, 0xee,  1, none), /* 0x04-0x05/0x14-0x15 */
-	OPTABLE(0x06, 0xfe,  1, none), /* 0x06-0x07 */
-	OPTABLE(0x08, 0xea,  1, none), /* 0x08-0x09/0x0c-0x0d/0x18-0x19/0x1c-0x1d */
-	OPTABLE(0x0a, 0xee,  1, none), /* 0x0a-0x0b/0x1a-0x1b */
-	OPTABLE(0x0e, 0xee,  1, none), /* 0x0e-0x0f/0x1e-0x1f */
-	OPTABLE(0x10, 0xfc,  1, none), /* 0x10-0x13 */
-	OPTABLE(0x16, 0xfe,  1, none), /* 0x16-0x17 */
-	OPTABLE(0x20, 0xe0,  1, none), /* 0x20-0x3f */
-	OPTABLE(0x40, 0xf0,  1, relb), /* 0x40-0x4f */
-	OPTABLE(0x50, 0xfc,  1, none), /* 0x50-0x53 */
-	OPTABLE(0x54, 0xfd,  1, ret), /* 0x54/0x56 */
-	OPTABLE(0x55, 0xff,  1, relb), /* 0x55 */
-	OPTABLE(0x57, 0xff,  1, none), /* 0x57 */
-	OPTABLE(0x58, 0xfb,  2, relw), /* 0x58/0x5c */
-	OPTABLE(0x59, 0xfb,  1, reg), /* 0x59/0x5b */
-	OPTABLE(0x5a, 0xfb,  2, jabs), /* 0x5a/0x5e */
-	OPTABLE(0x5b, 0xfb,  2, ind), /* 0x5b/0x5f */
-	OPTABLE(0x60, 0xe8,  1, none), /* 0x60-0x67/0x70-0x77 */
-	OPTABLE(0x68, 0xfa,  1, none), /* 0x68-0x69/0x6c-0x6d */
-	OPTABLE(0x6a, 0xfe, -2, none), /* 0x6a-0x6b */
-	OPTABLE(0x6e, 0xfe,  2, none), /* 0x6e-0x6f */
-	OPTABLE(0x78, 0xff,  4, none), /* 0x78 */
-	OPTABLE(0x79, 0xff,  2, none), /* 0x79 */
-	OPTABLE(0x7a, 0xff,  3, none), /* 0x7a */
-	OPTABLE(0x7b, 0xff,  2, none), /* 0x7b */
-	OPTABLE(0x7c, 0xfc,  2, none), /* 0x7c-0x7f */
-	OPTABLE(0x80, 0x80,  1, none), /* 0x80-0xff */
-};
-
-static const struct optable optable_1[] = {
-	OPTABLE(0x00, 0xff, -3, none), /* 0x0100 */
-	OPTABLE(0x40, 0xf0, -3, none), /* 0x0140-0x14f */
-	OPTABLE(0x80, 0xf0,  1, none), /* 0x0180-0x018f */
-	OPTABLE(0xc0, 0xc0,  2, none), /* 0x01c0-0x01ff */
-};
-
-static const struct optable optable_2[] = {
-	OPTABLE(0x00, 0x20,  2, none), /* 0x6a0?/0x6a8?/0x6b0?/0x6b8? */
-	OPTABLE(0x20, 0x20,  3, none), /* 0x6a2?/0x6aa?/0x6b2?/0x6ba? */
-};
-
-static const struct optable optable_3[] = {
-	OPTABLE(0x69, 0xfb,  2, none), /* 0x010069/0x01006d/014069/0x01406d */
-	OPTABLE(0x6b, 0xff, -4, none), /* 0x01006b/0x01406b */
-	OPTABLE(0x6f, 0xff,  3, none), /* 0x01006f/0x01406f */
-	OPTABLE(0x78, 0xff,  5, none), /* 0x010078/0x014078 */
-};
-
-static const struct optable optable_4[] = {
-/* 0x0100690?/0x01006d0?/0140690?/0x01406d0?/
-   0x0100698?/0x01006d8?/0140698?/0x01406d8? */
-	OPTABLE(0x00, 0x78, 3, none),
-/* 0x0100692?/0x01006d2?/0140692?/0x01406d2?/
-   0x010069a?/0x01006da?/014069a?/0x01406da? */
-	OPTABLE(0x20, 0x78, 4, none),
-};
-
-static const struct optables_list {
-	const struct optable *ptr;
-	int size;
-} optables[] = {
-#define OPTABLES(no)                                                   \
-	{                                                              \
-		.ptr  = optable_##no,                                  \
-		.size = sizeof(optable_##no) / sizeof(struct optable), \
-	}
-	OPTABLES(0),
-	OPTABLES(1),
-	OPTABLES(2),
-	OPTABLES(3),
-	OPTABLES(4),
-
-};
-
-const unsigned char condmask[] = {
-	0x00, 0x40, 0x01, 0x04, 0x02, 0x08, 0x10, 0x20
-};
-
-static int isbranch(struct task_struct *task, int reson)
-{
-	unsigned char cond = h8300_get_reg(task, PT_CCR);
-
-	/* encode complex conditions */
-	/* B4: N^V
-	   B5: Z|(N^V)
-	   B6: C|Z */
-	__asm__("bld #3,%w0\n\t"
-		"bxor #1,%w0\n\t"
-		"bst #4,%w0\n\t"
-		"bor #2,%w0\n\t"
-		"bst #5,%w0\n\t"
-		"bld #2,%w0\n\t"
-		"bor #0,%w0\n\t"
-		"bst #6,%w0\n\t"
-		: "=&r"(cond) : "0"(cond) : "cc");
-	cond &= condmask[reson >> 1];
-	if (!(reson & 1))
-		return cond == 0;
-	else
-		return cond != 0;
-}
-
-static unsigned short *decode(struct task_struct *child,
-			      const struct optable *op,
-			      char *fetch_p, unsigned short *pc,
-			      unsigned char inst)
-{
-	unsigned long addr;
-	unsigned long *sp;
-	int regno;
-
-	switch (op->type) {
-	case none:
-		return (unsigned short *)pc + op->length;
-	case jabs:
-		addr = *(unsigned long *)pc;
-		return (unsigned short *)(addr & 0x00ffffff);
-	case ind:
-		addr = *pc & 0xff;
-		return (unsigned short *)(*(unsigned long *)addr);
-	case ret:
-		sp = (unsigned long *)h8300_get_reg(child, PT_USP);
-		/* user stack frames
-		   |   er0  | temporary saved
-		   +--------+
-		   |   exp  | exception stack frames
-		   +--------+
-		   | ret pc | userspace return address
-		*/
-		return (unsigned short *)(*(sp+2) & 0x00ffffff);
-	case reg:
-		regno = (*pc >> 4) & 0x07;
-		if (regno == 0)
-			addr = h8300_get_reg(child, PT_ER0);
-		else
-			addr = h8300_get_reg(child, regno-1 + PT_ER1);
-		return (unsigned short *)addr;
-	case relb:
-		if (inst == 0x55 || isbranch(child, inst & 0x0f))
-			pc = (unsigned short *)((unsigned long)pc +
-						((signed char)(*fetch_p)));
-		return pc+1; /* skip myself */
-	case relw:
-		if (inst == 0x5c || isbranch(child, (*fetch_p & 0xf0) >> 4))
-			pc = (unsigned short *)((unsigned long)pc +
-						((signed short)(*(pc+1))));
-		return pc+2; /* skip myself */
-	default:
-		return NULL;
-	}
-}
-
-static unsigned short *nextpc(struct task_struct *child, unsigned short *pc)
-{
-	const struct optable *op;
-	unsigned char *fetch_p;
-	int op_len;
-	unsigned char inst;
-
-	op = optables[0].ptr;
-	op_len = optables[0].size;
-	fetch_p = (unsigned char *)pc;
-	inst = *fetch_p++;
-	do {
-		if ((inst & op->bitmask) == op->bitpattern) {
-			if (op->length < 0) {
-				op = optables[-op->length].ptr;
-				op_len = optables[-op->length].size + 1;
-				inst = *fetch_p++;
-			} else
-				return decode(child, op, fetch_p, pc, inst);
-		} else
-			op++;
-	} while (--op_len > 0);
-	return NULL;
-}
-
-/* Set breakpoint(s) to simulate a single step from the current PC.  */
-
-void user_enable_single_step(struct task_struct *child)
-{
-	unsigned short *next;
-
-	next = nextpc(child, (unsigned short *)h8300_get_reg(child, PT_PC));
-	child->thread.breakinfo.addr = next;
-	child->thread.breakinfo.inst = *next;
-	*next = BREAKINST;
-}
-
-asmlinkage void trace_trap(unsigned long bp)
-{
-	if ((unsigned long)current->thread.breakinfo.addr == bp) {
-		user_disable_single_step(current);
-		force_sig(SIGTRAP);
-	} else
-		force_sig(SIGILL);
-}

arch/h8300/kernel/ptrace_s.c

···
-/*
- *  linux/arch/h8300/kernel/ptrace_h8s.c
- *    ptrace cpu depend helper functions
- *
- *  Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file COPYING in the main directory of
- * this archive for more details.
- */
-
-#include <linux/linkage.h>
-#include <linux/sched/signal.h>
-#include <linux/errno.h>
-#include <asm/ptrace.h>
-
-#define CCR_MASK  0x6f
-#define EXR_TRACE 0x80
-
-/* disable singlestep */
-void user_disable_single_step(struct task_struct *child)
-{
-	unsigned char exr;
-
-	exr = h8300_get_reg(child, PT_EXR);
-	exr &= ~EXR_TRACE;
-	h8300_put_reg(child, PT_EXR, exr);
-}
-
-/* enable singlestep */
-void user_enable_single_step(struct task_struct *child)
-{
-	unsigned char exr;
-
-	exr = h8300_get_reg(child, PT_EXR);
-	exr |= EXR_TRACE;
-	h8300_put_reg(child, PT_EXR, exr);
-}
-
-asmlinkage void trace_trap(unsigned long bp)
-{
-	(void)bp;
-	force_sig(SIGTRAP);
-}

arch/h8300/kernel/setup.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/h8300/kernel/setup.c
- *
- *  Copyright (C) 2001-2014 Yoshinori Sato <[e-mail]>
- */
-
-/*
- * This file handles the architecture-dependent parts of system setup
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/console.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/of.h>
-#include <linux/of_fdt.h>
-#include <linux/of_address.h>
-#include <linux/clk-provider.h>
-#include <linux/memblock.h>
-#include <linux/screen_info.h>
-#include <linux/clocksource.h>
-
-#include <asm/setup.h>
-#include <asm/irq.h>
-#include <asm/sections.h>
-#include <asm/page.h>
-
-#if defined(CONFIG_CPU_H8300H)
-#define CPU "H8/300H"
-#elif defined(CONFIG_CPU_H8S)
-#define CPU "H8S"
-#else
-#define CPU "Unknown"
-#endif
-
-unsigned long memory_start;
-unsigned long memory_end;
-EXPORT_SYMBOL(memory_end);
-static unsigned long freq;
-extern char __dtb_start[];
-
-#ifdef CONFIG_VT
-struct screen_info screen_info;
-#endif
-
-char __initdata command_line[COMMAND_LINE_SIZE];
-
-void sim_console_register(void);
-
-void __init h8300_fdt_init(void *fdt, char *bootargs)
-{
-	if (!fdt)
-		fdt = __dtb_start;
-	else
-		strcpy(command_line, bootargs);
-
-	early_init_dt_scan(fdt);
-	memblock_allow_resize();
-}
-
-static void __init bootmem_init(void)
-{
-	memory_end = memory_start = 0;
-
-	/* Find main memory where is the kernel */
-	memory_start = memblock_start_of_DRAM();
-	memory_end = memblock_end_of_DRAM();
-
-	if (!memory_end)
-		panic("No memory!");
-
-	/* setup bootmem globals (we use no_bootmem, but mm still depends on this) */
-	min_low_pfn = PFN_UP(memory_start);
-	max_low_pfn = PFN_DOWN(memory_end);
-	max_pfn = max_low_pfn;
-
-	memblock_reserve(__pa(_stext), _end - _stext);
-
-	early_init_fdt_reserve_self();
-	early_init_fdt_scan_reserved_mem();
-
-	memblock_dump_all();
-}
-
-void __init setup_arch(char **cmdline_p)
-{
-	unflatten_and_copy_device_tree();
-
-	setup_initial_init_mm(_stext, _etext, _edata, NULL);
-
-	pr_notice("\r\n\nuClinux " CPU "\n");
-	pr_notice("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
-
-	if (*command_line)
-		strcpy(boot_command_line, command_line);
-	*cmdline_p = boot_command_line;
-
-	parse_early_param();
-
-	bootmem_init();
-	/*
-	 * get kmalloc into gear
-	 */
-	paging_init();
-}
-
-/*
- *	Get CPU information for use by the procfs.
- */
-
-static int show_cpuinfo(struct seq_file *m, void *v)
-{
-	char *cpu;
-
-	cpu = CPU;
-
-	seq_printf(m,  "CPU:\t\t%s\n"
-		   "Clock:\t\t%lu.%1luMHz\n"
-		   "BogoMips:\t%lu.%02lu\n"
-		   "Calibration:\t%lu loops\n",
-		   cpu,
-		   freq/1000, freq%1000,
-		   (loops_per_jiffy*HZ)/500000,
-		   ((loops_per_jiffy*HZ)/5000)%100,
-		   (loops_per_jiffy*HZ));
-
-	return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t *pos)
-{
-	return *pos < num_possible_cpus() ?
-		((void *) 0x12345678) : NULL;
-}
-
-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
-{
-	++*pos;
-	return c_start(m, pos);
-}
-
-static void c_stop(struct seq_file *m, void *v)
-{
-}
-
-const struct seq_operations cpuinfo_op = {
-	.start	= c_start,
-	.next	= c_next,
-	.stop	= c_stop,
-	.show	= show_cpuinfo,
-};
-
-#if defined(CONFIG_CPU_H8300H)
-#define get_wait(base, addr) ({		\
-	int baddr;			\
-	baddr = ((addr) / 0x200000 * 2);			     \
-	w *= (readw((base) + 2) & (3 << baddr)) + 1;		     \
-	})
-#endif
-#if defined(CONFIG_CPU_H8S)
-#define get_wait(base, addr) ({		\
-	int baddr;			\
-	baddr = ((addr) / 0x200000 * 16);			     \
-	w *= (readl((base) + 2) & (7 << baddr)) + 1;	\
-	})
-#endif
-
-static __init int access_timing(void)
-{
-	struct device_node *bsc;
-	void __iomem *base;
-	unsigned long addr = (unsigned long)&__delay;
-	int bit = 1 << (addr / 0x200000);
-	int w;
-
-	bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
-	base = of_iomap(bsc, 0);
-	w = (readb(base + 0) & bit)?2:1;
-	if (readb(base + 1) & bit)
-		w *= get_wait(base, addr);
-	else
-		w *= 2;
-	return w * 3 / 2;
-}
-
-void __init calibrate_delay(void)
-{
-	struct device_node *cpu;
-	int freq;
-
-	cpu = of_find_compatible_node(NULL, NULL, "renesas,h8300");
-	of_property_read_s32(cpu, "clock-frequency", &freq);
-	loops_per_jiffy = freq / HZ / (access_timing() * 2);
-	pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n",
-		loops_per_jiffy / (500000 / HZ),
-		(loops_per_jiffy / (5000 / HZ)) % 100, loops_per_jiffy);
-}
-
-
-void __init time_init(void)
-{
-	of_clk_init(NULL);
-	timer_probe();
-}

arch/h8300/kernel/signal.c

···
-/*
- *  linux/arch/h8300/kernel/signal.c
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-/*
- * uClinux H8/300 support by Yoshinori Sato <[e-mail]>
- *                and David McCullough <[e-mail]>
- *
- * Based on
- * Linux/m68k by Hamish Macdonald
- */
-
-/*
- * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
- * Atari :-) Current limitation: Only one sigstack can be active at one time.
- * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
- * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
- * signal handlers!
- */
-
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/syscalls.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/highuid.h>
-#include <linux/personality.h>
-#include <linux/tty.h>
-#include <linux/binfmts.h>
-#include <linux/resume_user_mode.h>
-
-#include <asm/setup.h>
-#include <linux/uaccess.h>
-#include <asm/traps.h>
-#include <asm/ucontext.h>
-
-/*
- * Do a signal return; undo the signal stack.
- *
- * Keep the return code on the stack quadword aligned!
- * That makes the cache flush below easier.
- */
-
-struct rt_sigframe {
-	long dummy_er0;
-	long dummy_vector;
-#if defined(CONFIG_CPU_H8S)
-	short dummy_exr;
-#endif
-	long dummy_pc;
-	char *pretcode;
-	struct siginfo *pinfo;
-	void *puc;
-	unsigned char retcode[8];
-	struct siginfo info;
-	struct ucontext uc;
-	int sig;
-} __packed __aligned(2);
-
-static inline int
-restore_sigcontext(struct sigcontext *usc, int *pd0)
-{
-	struct pt_regs *regs = current_pt_regs();
-	int err = 0;
-	unsigned int ccr;
-	unsigned int usp;
-	unsigned int er0;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current->restart_block.fn = do_no_restart_syscall;
-
-	/* restore passed registers */
-#define COPY(r)  do { err |= get_user(regs->r, &usc->sc_##r); } while (0)
-	COPY(er1);
-	COPY(er2);
-	COPY(er3);
-	COPY(er5);
-	COPY(pc);
-	ccr = regs->ccr & 0x10;
-	COPY(ccr);
-#undef COPY
-	regs->ccr &= 0xef;
-	regs->ccr |= ccr;
-	regs->orig_er0 = -1;		/* disable syscall checks */
-	err |= __get_user(usp, &usc->sc_usp);
-	regs->sp = usp;
-
-	err |= __get_user(er0, &usc->sc_er0);
-	*pd0 = er0;
-	return err;
-}
-
-asmlinkage int sys_rt_sigreturn(void)
-{
-	unsigned long usp = rdusp();
-	struct rt_sigframe *frame = (struct rt_sigframe *)(usp - 4);
-	sigset_t set;
-	int er0;
-
-	if (!access_ok(frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(&frame->uc.uc_mcontext, &er0))
-		goto badframe;
-
-	if (restore_altstack(&frame->uc.uc_stack))
-		goto badframe;
-
-	return er0;
-
-badframe:
-	force_sig(SIGSEGV);
-	return 0;
-}
-
-static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
-			     unsigned long mask)
-{
-	int err = 0;
-
-	err |= __put_user(regs->er0, &sc->sc_er0);
-	err |= __put_user(regs->er1, &sc->sc_er1);
-	err |= __put_user(regs->er2, &sc->sc_er2);
-	err |= __put_user(regs->er3, &sc->sc_er3);
-	err |= __put_user(regs->er4, &sc->sc_er4);
-	err |= __put_user(regs->er5, &sc->sc_er5);
-	err |= __put_user(regs->er6, &sc->sc_er6);
-	err |= __put_user(rdusp(),   &sc->sc_usp);
-	err |= __put_user(regs->pc,  &sc->sc_pc);
-	err |= __put_user(regs->ccr, &sc->sc_ccr);
-	err |= __put_user(mask,      &sc->sc_mask);
-
-	return err;
-}
-
-static inline void __user *
-get_sigframe(struct ksignal *ksig, struct pt_regs *regs, size_t frame_size)
-{
-	return (void __user *)((sigsp(rdusp(), ksig) - frame_size) & -8UL);
-}
-
-static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
-			  struct pt_regs *regs)
-{
-	struct rt_sigframe *frame;
-	int err = 0;
-	unsigned char *ret;
-
-	frame = get_sigframe(ksig, regs, sizeof(*frame));
-
-	if (!access_ok(frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
-		err |= copy_siginfo_to_user(&frame->info, &ksig->info);
-
-	/* Create the ucontext.  */
-	err |= __put_user(0, &frame->uc.uc_flags);
-	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
-	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
-	err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-	if (err)
-		return -EFAULT;
-
-	/* Set up to return from userspace.  */
-	ret = (unsigned char *)&frame->retcode;
-	if (ksig->ka.sa.sa_flags & SA_RESTORER)
-		ret = (unsigned char *)(ksig->ka.sa.sa_restorer);
-	else {
-		/* sub.l er0,er0; mov.b #__NR_rt_sigreturn,r0l; trapa #0 */
-		err |= __put_user(0x1a80f800 + (__NR_rt_sigreturn & 0xff),
-				  (unsigned long *)(frame->retcode + 0));
-		err |= __put_user(0x5700,
-				  (unsigned short *)(frame->retcode + 4));
-	}
-	err |= __put_user(ret, &frame->pretcode);
-
-	if (err)
-		return -EFAULT;
-
-	/* Set up registers for signal handler */
-	regs->sp  = (unsigned long)frame;
-	regs->pc  = (unsigned long)ksig->ka.sa.sa_handler;
-	regs->er0 = ksig->sig;
-	regs->er1 = (unsigned long)&(frame->info);
-	regs->er2 = (unsigned long)&frame->uc;
-	regs->er5 = current->mm->start_data;	/* GOT base */
-
-	return 0;
-}
-
-static void
-handle_restart(struct pt_regs *regs, struct k_sigaction *ka)
-{
-	switch (regs->er0) {
-	case -ERESTARTNOHAND:
-		if (!ka)
-			goto do_restart;
-		regs->er0 = -EINTR;
-		break;
-	case -ERESTART_RESTARTBLOCK:
-		if (!ka) {
-			regs->er0 = __NR_restart_syscall;
-			regs->pc -= 2;
-		} else
-			regs->er0 = -EINTR;
-		break;
-	case -ERESTARTSYS:
-		if (!(ka->sa.sa_flags & SA_RESTART)) {
-			regs->er0 = -EINTR;
-			break;
-		}
-		fallthrough;
-	case -ERESTARTNOINTR:
-do_restart:
-		regs->er0 = regs->orig_er0;
-		regs->pc -= 2;
-		break;
-	}
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void
-handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
-	sigset_t *oldset = sigmask_to_save();
-	int ret;
-	/* are we from a system call? */
-	if (regs->orig_er0 >= 0)
-		handle_restart(regs, &ksig->ka);
-
-	ret = setup_rt_frame(ksig, oldset, regs);
-
-	signal_setup_done(ret, ksig, 0);
-}
-
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- */
-static void do_signal(struct pt_regs *regs)
-{
-	struct ksignal ksig;
-
-	current->thread.esp0 = (unsigned long) regs;
-
-	if (get_signal(&ksig)) {
-		/* Whee!  Actually deliver the signal.  */
-		handle_signal(&ksig, regs);
-		return;
-	}
-	/* Did we come from a system call? */
-	if (regs->orig_er0 >= 0)
-		handle_restart(regs, NULL);
-
-	/* If there's no signal to deliver, we just restore the saved mask.  */
-	restore_saved_sigmask();
-}
-
-asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
-{
-	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
-		do_signal(regs);
-
-	if (thread_info_flags & _TIF_NOTIFY_RESUME)
-		resume_user_mode_work(regs);
-}

arch/h8300/kernel/sim-console.c

···
-/*
- * arch/h8300/kernel/sim-console.c
- *
- *  Copyright (C) 2015 Yoshinori Sato <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/serial_core.h>
-
-static void sim_write(struct console *con, const char *s, unsigned n)
-{
-	register const char *_ptr __asm__("er1") = s;
-	register const unsigned _len __asm__("er2") = n;
-
-	__asm__("sub.l er0,er0\n\t"		/* er0 = 1 (stdout) */
-		"inc.l #1,er0\n\t"
-		".byte 0x5e,0x00,0x00,0xc7\n\t" /* jsr @0xc7 (sys_write) */
-		: : "g"(_ptr), "g"(_len):"er0");
-}
-
-static int __init sim_setup(struct earlycon_device *device, const char *opt)
-{
-	device->con->write = sim_write;
-	return 0;
-}
-
-EARLYCON_DECLARE(h8sim, sim_setup);

arch/h8300/kernel/syscalls.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/syscalls.h>
-#include <linux/signal.h>
-#include <linux/unistd.h>
-
-#undef __SYSCALL
-#define __SYSCALL(nr, call) [nr] = (call),
-
-#define sys_mmap2 sys_mmap_pgoff
-
-asmlinkage int sys_rt_sigreturn(void);
-
-void *_sys_call_table[__NR_syscalls] = {
-#include <asm/unistd.h>
-};

arch/h8300/kernel/traps.c

···
-/*
- * linux/arch/h8300/boot/traps.c -- general exception handling code
- * H8/300 support Yoshinori Sato <[e-mail]>
- *
- * Cloned from Linux/m68k.
- *
- * No original Copyright holder listed,
- * Probable original (C) Roman Zippel (assigned DJD, 1999)
- *
- * Copyright 1999-2000 D. Jeff Dionne, <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task.h>
-#include <linux/mm_types.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/bug.h>
-
-#include <asm/irq.h>
-#include <asm/traps.h>
-#include <asm/page.h>
-
-static DEFINE_SPINLOCK(die_lock);
-
-/*
- * this must be called very early as the kernel might
- * use some instruction that are emulated on the 060
- */
-
-void __init base_trap_init(void)
-{
-}
-
-asmlinkage void set_esp0(unsigned long ssp)
-{
-	current->thread.esp0 = ssp;
-}
-
-/*
- *	Generic dumping code. Used for panic and debug.
- */
-
-static void dump(struct pt_regs *fp)
-{
-	unsigned long	*sp;
-	unsigned char	*tp;
-	int		i;
-
-	pr_info("\nCURRENT PROCESS:\n\n");
-	pr_info("COMM=%s PID=%d\n", current->comm, current->pid);
-	if (current->mm) {
-		pr_info("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
-			(int) current->mm->start_code,
-			(int) current->mm->end_code,
-			(int) current->mm->start_data,
-			(int) current->mm->end_data,
-			(int) current->mm->end_data,
-			(int) current->mm->brk);
-		pr_info("USER-STACK=%08x  KERNEL-STACK=%08lx\n\n",
-			(int) current->mm->start_stack,
-			(int) PAGE_SIZE+(unsigned long)current);
-	}
-
-	show_regs(fp);
-	pr_info("\nCODE:");
-	tp = ((unsigned char *) fp->pc) - 0x20;
-	for (sp = (unsigned long *) tp, i = 0; (i < 0x40);  i += 4) {
-		if ((i % 0x10) == 0)
-			pr_info("\n%08x: ", (int) (tp + i));
-		pr_info("%08x ", (int) *sp++);
-	}
-	pr_info("\n");
-
-	pr_info("\nKERNEL STACK:");
-	tp = ((unsigned char *) fp) - 0x40;
-	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
-		if ((i % 0x10) == 0)
-			pr_info("\n%08x: ", (int) (tp + i));
-		pr_info("%08x ", (int) *sp++);
-	}
-	pr_info("\n");
-	if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE))
-		pr_info("(Possibly corrupted stack page??)\n");
-
-	pr_info("\n\n");
-}
-
-void die(const char *str, struct pt_regs *fp, unsigned long err)
-{
-	static int diecount;
-
-	oops_enter();
-
-	console_verbose();
-	spin_lock_irq(&die_lock);
-	report_bug(fp->pc, fp);
-	pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
-	dump(fp);
-
-	spin_unlock_irq(&die_lock);
-	make_task_dead(SIGSEGV);
-}
-
-static int kstack_depth_to_print = 24;
-
-void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl)
-{
-	unsigned long *stack,  addr;
-	int i;
-
-	if (esp == NULL)
-		esp = (unsigned long *) &esp;
-
-	stack = esp;
-
-	printk("%sStack from %08lx:", loglvl, (unsigned long)stack);
-	for (i = 0; i < kstack_depth_to_print; i++) {
-		if (((unsigned long)stack & (THREAD_SIZE - 1)) >=
-		    THREAD_SIZE-4)
-			break;
-		if (i % 8 == 0)
-			printk("%s ", loglvl);
-		pr_cont(" %08lx", *stack++);
-	}
-
-	printk("%s\nCall Trace:\n", loglvl);
-	i = 0;
-	stack = esp;
-	while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) {
-		addr = *stack++;
-		/*
-		 * If the address is either in the text segment of the
-		 * kernel, or in the region which contains vmalloc'ed
-		 * memory, it *may* be the address of a calling
-		 * routine; if so, print it so that someone tracing
-		 * down the cause of the crash will be able to figure
-		 * out the call path that was taken.
-		 */
-		if (check_kernel_text(addr)) {
-			if (i % 4 == 0)
-				printk("%s       ", loglvl);
-			pr_cont(" [<%08lx>]", addr);
-			i++;
-		}
-	}
-	printk("%s\n", loglvl);
-}

arch/h8300/kernel/vmlinux.lds.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#define RO_EXCEPTION_TABLE_ALIGN	16
-
-#include <asm-generic/vmlinux.lds.h>
-#include <asm/page.h>
-#include <asm/thread_info.h>
-
-#define ROMTOP 0x000000
-#define RAMTOP 0x400000
-
-jiffies = jiffies_64 + 4;
-
-ENTRY(_start)
-
-SECTIONS
-{
-#if defined(CONFIG_ROMKERNEL)
-	. = ROMTOP;
-	.vectors :
-	{
-	_vector = . ;
-		*(.vector*)
-	}
-#else
-	. = RAMTOP;
-	_ramstart = .;
-	. = . + CONFIG_OFFSET;
-#endif
-	_text = .;
-	HEAD_TEXT_SECTION
-	.text : {
-	_stext = . ;
-		TEXT_TEXT
-		SCHED_TEXT
-		CPUIDLE_TEXT
-		LOCK_TEXT
-#if defined(CONFIG_ROMKERNEL)
-		*(.int_redirect)
-#endif
-	_etext = . ;
-	}
-	RO_DATA(4)
-	ROMEND = .;
-#if defined(CONFIG_ROMKERNEL)
-	. = RAMTOP;
-	_ramstart = .;
-#define ADDR(x) ROMEND
-#endif
-	_sdata = . ;
-	__data_start = . ;
-	RW_DATA(0, PAGE_SIZE, THREAD_SIZE)
-#if defined(CONFIG_ROMKERNEL)
-#undef ADDR
-#endif
-	. = ALIGN(0x4) ;
-	__init_begin = .;
-	INIT_TEXT_SECTION(4)
-	INIT_DATA_SECTION(4)
-	__init_end = .;
-	_edata = . ;
-	_begin_data = LOADADDR(.data);
-	_sbss =.;
-	BSS_SECTION(0, 0 ,0)
-	_ebss =.;
-	_ramend = .;
-	_end = .;
-	DISCARDS
-}

arch/h8300/lib/Makefile

···
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for H8/300-specific library files..
-#
-
-lib-y  = memcpy.o memset.o abs.o \
-	 mulsi3.o udivsi3.o muldi3.o moddivsi3.o \
-	 ashldi3.o lshrdi3.o ashrdi3.o ucmpdi2.o \
-	 delay.o

arch/h8300/lib/abs.S

···
-;;; SPDX-License-Identifier: GPL-2.0
-;;; abs.S
-
-#include <asm/linkage.h>
-
-#if defined(CONFIG_CPU_H8300H)
-	.h8300h
-#endif
-#if defined(CONFIG_CPU_H8S)
-	.h8300s
-#endif
-	.text
-.global _abs
-
-;;; int abs(int n)
-_abs:
-	mov.l	er0,er0
-	bpl	1f
-	neg.l	er0
-1:
-	rts

arch/h8300/lib/ashldi3.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include "libgcc.h"
-
-DWtype
-__ashldi3(DWtype u, word_type b)
-{
-	const DWunion uu = {.ll = u};
-	const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
-	DWunion w;
-
-	if (b == 0)
-		return u;
-
-	if (bm <= 0) {
-		w.s.low = 0;
-		w.s.high = (UWtype) uu.s.low << -bm;
-	} else {
-		const UWtype carries = (UWtype) uu.s.low >> bm;
-
-		w.s.low = (UWtype) uu.s.low << b;
-		w.s.high = ((UWtype) uu.s.high << b) | carries;
-	}
-
-	return w.ll;
-}

arch/h8300/lib/ashrdi3.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include "libgcc.h"
-
-DWtype __ashrdi3(DWtype u, word_type b)
-{
-	const DWunion uu = {.ll = u};
-	const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
-	DWunion w;
-
-	if (b == 0)
-		return u;
-
-	if (bm <= 0) {
-		/* w.s.high = 1..1 or 0..0 */
-		w.s.high = uu.s.high >> (sizeof (Wtype) * BITS_PER_UNIT - 1);
-		w.s.low = uu.s.high >> -bm;
-	} else {
-		const UWtype carries = (UWtype) uu.s.high << bm;
-
-		w.s.high = uu.s.high >> b;
-		w.s.low = ((UWtype) uu.s.low >> b) | carries;
-	}
-
-	return w.ll;
-}

arch/h8300/lib/delay.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * delay loops
- *
- * Copyright (C) 2015 Yoshinori Sato
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <asm/param.h>
-#include <asm/processor.h>
-#include <asm/timex.h>
-
-void __delay(unsigned long cycles)
-{
-	__asm__ volatile ("1: dec.l #1,%0\n\t"
-			  "bne 1b":"=r"(cycles):"0"(cycles));
-}
-EXPORT_SYMBOL(__delay);
-
-void __const_udelay(unsigned long xloops)
-{
-	u64 loops;
-
-	loops = (u64)xloops * loops_per_jiffy * HZ;
-
-	__delay(loops >> 32);
-}
-EXPORT_SYMBOL(__const_udelay);
-
-void __udelay(unsigned long usecs)
-{
-	__const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */
-}
-EXPORT_SYMBOL(__udelay);
-
-void __ndelay(unsigned long nsecs)
-{
-	__const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */
-}
-EXPORT_SYMBOL(__ndelay);

arch/h8300/lib/libgcc.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __H8300_LIBGCC_H__
-#define __H8300_LIBGCC_H__
-
-#ifdef __ASSEMBLY__
-#define A0 r0
-#define A0L r0l
-#define A0H r0h
-
-#define A1 r1
-#define A1L r1l
-#define A1H r1h
-
-#define A2 r2
-#define A2L r2l
-#define A2H r2h
-
-#define A3 r3
-#define A3L r3l
-#define A3H r3h
-
-#define S0 r4
-#define S0L r4l
-#define S0H r4h
-
-#define S1 r5
-#define S1L r5l
-#define S1H r5h
-
-#define S2 r6
-#define S2L r6l
-#define S2H r6h
-
-#define PUSHP	push.l
-#define POPP	pop.l
-
-#define A0P	er0
-#define A1P	er1
-#define A2P	er2
-#define A3P	er3
-#define S0P	er4
-#define S1P	er5
-#define S2P	er6
-
-#define A0E	e0
-#define A1E	e1
-#define A2E	e2
-#define A3E	e3
-#else
-#define Wtype   SItype
-#define UWtype  USItype
-#define HWtype  SItype
-#define UHWtype USItype
-#define DWtype  DItype
-#define UDWtype UDItype
-#define UWtype  USItype
-#define Wtype   SItype
-#define UWtype  USItype
-#define W_TYPE_SIZE (4 * BITS_PER_UNIT)
-#define BITS_PER_UNIT (8)
-
-typedef          int SItype     __attribute__ ((mode (SI)));
-typedef unsigned int USItype    __attribute__ ((mode (SI)));
-typedef		 int DItype	__attribute__ ((mode (DI)));
-typedef unsigned int UDItype	__attribute__ ((mode (DI)));
-struct DWstruct {
-	Wtype high, low;
-};
-typedef union {
-	struct DWstruct s;
-	DWtype ll;
-} DWunion;
-
-typedef int word_type __attribute__ ((mode (__word__)));
-
-#endif
-
-#endif

arch/h8300/lib/lshrdi3.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include "libgcc.h"
-
-DWtype __lshrdi3(DWtype u, word_type b)
-{
-	const DWunion uu = {.ll = u};
-	const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
-	DWunion w;
-
-	if (b == 0)
-		return u;
-
-	if (bm <= 0) {
-		w.s.high = 0;
-		w.s.low = (UWtype) uu.s.high >> -bm;
-	} else {
-		const UWtype carries = (UWtype) uu.s.high << bm;
-
-		w.s.high = (UWtype) uu.s.high >> b;
-		w.s.low = ((UWtype) uu.s.low >> b) | carries;
-	}
-
-	return w.ll;
-}

arch/h8300/lib/memcpy.S

···
-;;; SPDX-License-Identifier: GPL-2.0
-;;; memcpy.S
-
-#include <asm/linkage.h>
-
-#if defined(CONFIG_CPU_H8300H)
-	.h8300h
-#endif
-#if defined(CONFIG_CPU_H8S)
-	.h8300s
-#endif
-	.text
-.global memcpy
-
-;;; void *memcpy(void *to, void *from, size_t n)
-memcpy:
-	mov.l	er2,er2
-	bne	1f
-	rts
-1:
-	;; address check
-	bld	#0,r0l
-	bxor	#0,r1l
-	bcs	4f
-	mov.l	er4,@-sp
-	mov.l	er0,@-sp
-	btst	#0,r0l
-	beq	1f
-	;; (aligned even) odd address
-	mov.b	@er1,r3l
-	mov.b	r3l,@er0
-	adds	#1,er1
-	adds	#1,er0
-	dec.l	#1,er2
-	beq	3f
-1:
-	;; n < sizeof(unsigned long) check
-	sub.l	er4,er4
-	adds	#4,er4		; loop count check value
-	cmp.l	er4,er2
-	blo	2f
-	;; unsigned long copy
-1:
-	mov.l	@er1,er3
-	mov.l	er3,@er0
-	adds	#4,er0
-	adds	#4,er1
-	subs	#4,er2
-	cmp.l	er4,er2
-	bcc	1b
-	;; rest
-2:
-	mov.l	er2,er2
-	beq	3f
-1:
-	mov.b	@er1,r3l
-	mov.b	r3l,@er0
-	adds	#1,er1
-	adds	#1,er0
-	dec.l	#1,er2
-	bne	1b
-3:
-	mov.l	@sp+,er0
-	mov.l	@sp+,er4
-	rts
-
-	;; odd <- even / even <- odd
-4:
-	mov.l	er4,er3
-	mov.l	er2,er4
-	mov.l	er5,er2
-	mov.l	er1,er5
-	mov.l	er6,er1
-	mov.l	er0,er6
-1:
-	eepmov.w
-	mov.w	r4,r4
-	bne	1b
-	dec.w	#1,e4
-	bpl	1b
-	mov.l	er1,er6
-	mov.l	er2,er5
-	mov.l	er3,er4
-	rts
-
-	.end

arch/h8300/lib/memset.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-/* memset.S */
-
-#include <asm/linkage.h>
-
-#if defined(CONFIG_CPU_H8300H)
-	.h8300h
-#endif
-#if defined(CONFIG_CPU_H8S)
-	.h8300s
-#endif
-	.text
-
-.global	memset
-.global	clear_user
-
-;;void *memset(*ptr, int c, size_t count)
-;; ptr = er0
-;; c   = er1(r1l)
-;; count = er2
-memset:
-	btst	#0,r0l
-	beq	2f
-
-	;; odd address
-1:
-	mov.b	r1l,@er0
-	adds	#1,er0
-	dec.l	#1,er2
-	beq	6f
-
-	;; even address
-2:
-	mov.l	er2,er3
-	cmp.l	#4,er2
-	blo	4f
-	;; count>=4 -> count/4
-#if defined(CONFIG_CPU_H8300H)
-	shlr.l	er2
-	shlr.l	er2
-#endif
-#if defined(CONFIG_CPU_H8S)
-	shlr.l	#2,er2
-#endif
-	;; byte -> long
-	mov.b	r1l,r1h
-	mov.w	r1,e1
-3:
-	mov.l	er1,@er0
-	adds	#4,er0
-	dec.l	#1,er2
-	bne	3b
-4:
-	;; count % 4
-	and.b	#3,r3l
-	beq	6f
-5:
-	mov.b	r1l,@er0
-	adds	#1,er0
-	dec.b	r3l
-	bne	5b
-6:
-	rts
-
-clear_user:
-	mov.l	er1, er2
-	sub.l	er1, er1
-	bra	memset
-
-	.end

arch/h8300/lib/moddivsi3.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#include "libgcc.h"
-
-; numerator in A0/A1
-; denominator in A2/A3
-	.global	__modsi3
-__modsi3:
-	PUSHP	S2P
-	bsr	modnorm
-	bsr	__divsi3
-	mov.l	er3,er0
-	bra	exitdiv
-
-	.global	__umodsi3
-__umodsi3:
-	bsr	__udivsi3:16
-	mov.l	er3,er0
-	rts
-
-	.global	__divsi3
-__divsi3:
-	PUSHP	S2P
-	bsr	divnorm
-	bsr	__udivsi3:16
-
-	; examine what the sign should be
-exitdiv:
-	btst	#3,S2L
-	beq	reti
-
-	; should be -ve
-	neg.l	A0P
-
-reti:
-	POPP	S2P
-	rts
-
-divnorm:
-	mov.l	A0P,A0P		; is the numerator -ve
-	stc	ccr,S2L		; keep the sign in bit 3 of S2L
-	bge	postive
-
-	neg.l	A0P		; negate arg
-
-postive:
-	mov.l	A1P,A1P		; is the denominator -ve
-	bge	postive2
-
-	neg.l	A1P		; negate arg
-	xor.b	#0x08,S2L	; toggle the result sign
-
-postive2:
-	rts
-
-;; Basically the same, except that the sign of the divisor determines
-;; the sign.
-modnorm:
-	mov.l	A0P,A0P		; is the numerator -ve
-	stc	ccr,S2L		; keep the sign in bit 3 of S2L
-	bge	mpostive
-
-	neg.l	A0P		; negate arg
-
-mpostive:
-	mov.l	A1P,A1P		; is the denominator -ve
-	bge	mpostive2
-
-	neg.l	A1P		; negate arg
-
-mpostive2:
-	rts
-
-	.end

arch/h8300/lib/modsi3.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#include "libgcc.h"
-
-; numerator in A0/A1
-; denominator in A2/A3
-	.global	__modsi3
-__modsi3:
-	PUSHP	S2P
-	bsr	modnorm
-	bsr	__divsi3
-	mov.l	er3,er0
-	bra	exitdiv
-
-	.global	__umodsi3
-__umodsi3:
-	bsr	__udivsi3
-	mov.l	er3,er0
-	rts
-
-	.global	__divsi3
-__divsi3:
-	PUSHP	S2P
-	jsr	divnorm
-	bsr	__udivsi3
-
-	; examine what the sign should be
-exitdiv:
-	btst	#3,S2L
-	beq	reti
-
-	; should be -ve
-	neg.l	A0P
-
-reti:
-	POPP	S2P
-	rts
-
-divnorm:
-	mov.l	A0P,A0P		; is the numerator -ve
-	stc	ccr,S2L		; keep the sign in bit 3 of S2L
-	bge	postive
-
-	neg.l	A0P		; negate arg
-
-postive:
-	mov.l	A1P,A1P		; is the denominator -ve
-	bge	postive2
-
-	neg.l	A1P		; negate arg
-	xor.b	#0x08,S2L	; toggle the result sign
-
-postive2:
-	rts
-
-;; Basically the same, except that the sign of the divisor determines
-;; the sign.
-modnorm:
-	mov.l	A0P,A0P		; is the numerator -ve
-	stc	ccr,S2L		; keep the sign in bit 3 of S2L
-	bge	mpostive
-
-	neg.l	A0P		; negate arg
-
-mpostive:
-	mov.l	A1P,A1P		; is the denominator -ve
-	bge	mpostive2
-
-	neg.l	A1P		; negate arg
-
-mpostive2:
-	rts
-
-	.end

arch/h8300/lib/muldi3.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include "libgcc.h"
-
-#define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
-#define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
-#define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
-
-#define umul_ppmm(w1, w0, u, v) \
-	do {			   \
-		UWtype __x0, __x1, __x2, __x3;	\
-		UHWtype __ul, __vl, __uh, __vh; \
-		__ul = __ll_lowpart(u);	\
-		__uh = __ll_highpart(u);	\
-		__vl = __ll_lowpart(v);	\
-		__vh = __ll_highpart(v);	\
-		__x0 = (UWtype) __ul * __vl;	\
-		__x1 = (UWtype) __ul * __vh;	\
-		__x2 = (UWtype) __uh * __vl;	\
-		__x3 = (UWtype) __uh * __vh;	\
-		__x1 += __ll_highpart(__x0);	\
-		__x1 += __x2;			\
-		if (__x1 < __x2)		\
-			__x3 += __ll_B;		\
-		(w1) = __x3 + __ll_highpart(__x1);	       \
-		(w0) = __ll_lowpart(__x1) * __ll_B + __ll_lowpart(__x0); \
-	} while (0)
-
-#define __umulsidi3(u, v) (			\
-		{				\
-			DWunion __w;		\
-			umul_ppmm(__w.s.high, __w.s.low, u, v);	\
-			__w.ll; }					\
-		)
-
-DWtype __muldi3(DWtype u, DWtype v)
-{
-	const DWunion uu = {.ll = u};
-	const DWunion vv = {.ll = v};
-	DWunion w = {.ll = __umulsidi3(uu.s.low, vv.s.low)};
-
-	w.s.high += ((UWtype) uu.s.low * (UWtype) vv.s.high
-		     + (UWtype) uu.s.high * (UWtype) vv.s.low);
-
-	return w.ll;
-}

arch/h8300/lib/mulsi3.S

···
-; SPDX-License-Identifier: GPL-2.0
-;
-; mulsi3 for H8/300H - based on Renesas SH implementation
-;
-; by Toshiyasu Morita
-;
-; Old code:
-;
-; 16b * 16b = 372 states (worst case)
-; 32b * 32b = 724 states (worst case)
-;
-; New code:
-;
-; 16b * 16b =  48 states
-; 16b * 32b =  72 states
-; 32b * 32b =  92 states
-;
-
-	.global __mulsi3
-__mulsi3:
-	mov.w	r1,r2   ; ( 2 states) b * d
-	mulxu	r0,er2  ; (22 states)
-
-	mov.w	e0,r3   ; ( 2 states) a * d
-	beq	L_skip1 ; ( 4 states)
-	mulxu	r1,er3  ; (22 states)
-	add.w	r3,e2   ; ( 2 states)
-
-L_skip1:
-	mov.w	e1,r3   ; ( 2 states) c * b
-	beq	L_skip2 ; ( 4 states)
-	mulxu	r0,er3  ; (22 states)
-	add.w	r3,e2   ; ( 2 states)
-
-L_skip2:
-	mov.l	er2,er0	; ( 2 states)
-	rts		; (10 states)
-
-	.end

arch/h8300/lib/ucmpdi2.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include "libgcc.h"
-
-word_type __ucmpdi2(DWtype a, DWtype b)
-{
-	const DWunion au = {.ll = a};
-	const DWunion bu = {.ll = b};
-
-	if ((UWtype) au.s.high < (UWtype) bu.s.high)
-		return 0;
-	else if ((UWtype) au.s.high > (UWtype) bu.s.high)
-		return 2;
-	if ((UWtype) au.s.low < (UWtype) bu.s.low)
-		return 0;
-	else if ((UWtype) au.s.low > (UWtype) bu.s.low)
-		return 2;
-	return 1;
-}

arch/h8300/lib/udivsi3.S

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#include "libgcc.h"
-
-	;; This function also computes the remainder and stores it in er3.
-	.global	__udivsi3
-__udivsi3:
-	mov.w	A1E,A1E		; denominator top word 0?
-	bne	DenHighNonZero
-
-	; do it the easy way, see page 107 in manual
-	mov.w	A0E,A2
-	extu.l	A2P
-	divxu.w	A1,A2P
-	mov.w	A2E,A0E
-	divxu.w	A1,A0P
-	mov.w	A0E,A3
-	mov.w	A2,A0E
-	extu.l	A3P
-	rts
-
-	; er0 = er0 / er1
-	; er3 = er0 % er1
-	; trashes er1 er2
-	; expects er1 >= 2^16
-DenHighNonZero:
-	mov.l	er0,er3
-	mov.l	er1,er2
-#ifdef CONFIG_CPU_H8300H
-divmod_L21:
-	shlr.l	er0
-	shlr.l	er2		; make divisor < 2^16
-	mov.w	e2,e2
-	bne	divmod_L21
-#else
-	shlr.l	#2,er2		; make divisor < 2^16
-	mov.w	e2,e2
-	beq	divmod_L22A
-divmod_L21:
-	shlr.l	#2,er0
-divmod_L22:
-	shlr.l	#2,er2		; make divisor < 2^16
-	mov.w	e2,e2
-	bne	divmod_L21
-divmod_L22A:
-	rotxl.w	r2
-	bcs	divmod_L23
-	shlr.l	er0
-	bra	divmod_L24
-divmod_L23:
-	rotxr.w	r2
-	shlr.l	#2,er0
-divmod_L24:
-#endif
-	;; At this point,
-	;;  er0 contains shifted dividend
-	;;  er1 contains divisor
-	;;  er2 contains shifted divisor
-	;;  er3 contains dividend, later remainder
-	divxu.w	r2,er0		; r0 now contains the approximate quotient (AQ)
-	extu.l	er0
-	beq	divmod_L25
-	subs	#1,er0		; er0 = AQ - 1
-	mov.w	e1,r2
-	mulxu.w	r0,er2		; er2 = upper (AQ - 1) * divisor
-	sub.w	r2,e3		; dividend - 65536 * er2
-	mov.w	r1,r2
-	mulxu.w	r0,er2		; compute er3 = remainder (tentative)
-	sub.l	er2,er3		; er3 = dividend - (AQ - 1) * divisor
-divmod_L25:
-	cmp.l	er1,er3		; is divisor < remainder?
-	blo	divmod_L26
-	adds	#1,er0
-	sub.l	er1,er3		; correct the remainder
-divmod_L26:
-	rts
-
-	.end

arch/h8300/mm/Makefile

···
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the linux h8300-specific parts of the memory manager.
-#
-
-obj-y	 := init.o fault.o memory.o

arch/h8300/mm/fault.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/h8300/mm/fault.c
- *
- *  Copyright (C) 1998  D. Jeff Dionne <[e-mail]>,
- *  Copyright (C) 2000  Lineo, Inc.  (www.lineo.com)
- *
- *  Based on:
- *
- *  linux/arch/m68knommu/mm/fault.c
- *  linux/arch/m68k/mm/fault.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- */
-
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/ptrace.h>
-
-
-void die(const char *str, struct pt_regs *fp, unsigned long err);
-
-/*
- * This routine handles page faults.  It determines the problem, and
- * then passes it off to one of the appropriate routines.
- *
- * error_code:
- *	bit 0 == 0 means no page found, 1 means protection fault
- *	bit 1 == 0 means read, 1 means write
- *
- * If this routine detects a bad access, it returns 1, otherwise it
- * returns 0.
- */
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-			      unsigned long error_code)
-{
-#ifdef DEBUG
-	pr_debug("regs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld\n",
-		 regs->sr, regs->pc, address, error_code);
-#endif
-
-/*
- * Oops. The kernel tried to access some bad page. We'll have to
- * terminate things with extreme prejudice.
- */
-	if ((unsigned long) address < PAGE_SIZE)
-		pr_alert("Unable to handle kernel NULL pointer dereference");
-	else
-		pr_alert("Unable to handle kernel access");
-	printk(" at virtual address %08lx\n", address);
-	if (!user_mode(regs))
-		die("Oops", regs, error_code);
-	make_task_dead(SIGKILL);
-
-	return 1;
-}

arch/h8300/mm/init.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/h8300/mm/init.c
- *
- *  Copyright (C) 1998  D. Jeff Dionne <[e-mail]>,
- *                      Kenneth Albanowski <[e-mail]>,
- *  Copyright (C) 2000  Lineo, Inc.  (www.lineo.com)
- *
- *  Based on:
- *
- *  linux/arch/m68knommu/mm/init.c
- *  linux/arch/m68k/mm/init.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- *
- *  JAN/1999 -- hacked to support ColdFire ([e-mail])
- *  DEC/2000 -- linux 2.4 support <[e-mail]>
- */
-
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/init.h>
-#include <linux/highmem.h>
-#include <linux/pagemap.h>
-#include <linux/memblock.h>
-#include <linux/gfp.h>
-
-#include <asm/setup.h>
-#include <asm/page.h>
-#include <asm/sections.h>
-
-/*
- * ZERO_PAGE is a special page that is used for zero-initialized
- * data and COW.
- */
-unsigned long empty_zero_page;
-
-/*
- * paging_init() continues the virtual memory environment setup which
- * was begun by the code in arch/head.S.
- * The parameters are pointers to where to stick the starting and ending
- * addresses of available kernel virtual memory.
- */
-void __init paging_init(void)
-{
-	/*
-	 * Make sure start_mem is page aligned,  otherwise bootmem and
-	 * page_alloc get different views og the world.
-	 */
-	unsigned long start_mem = PAGE_ALIGN(memory_start);
-	unsigned long end_mem   = memory_end & PAGE_MASK;
-
-	pr_debug("start_mem is %#lx\nvirtual_end is %#lx\n",
-		 start_mem, end_mem);
-
-	/*
-	 * Initialize the bad page table and bad page to point
-	 * to a couple of allocated pages.
-	 */
-	empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE, PAGE_SIZE);
-	if (!empty_zero_page)
-		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-		      __func__, PAGE_SIZE, PAGE_SIZE);
-
-	pr_debug("before free_area_init\n");
-
-	pr_debug("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
-		 start_mem, end_mem);
-
-	{
-		unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
-
-		max_zone_pfn[ZONE_NORMAL] = end_mem >> PAGE_SHIFT;
-		free_area_init(max_zone_pfn);
-	}
-}
-
-void __init mem_init(void)
-{
-	pr_devel("Mem_init: start=%lx, end=%lx\n", memory_start, memory_end);
-
-	high_memory = (void *) (memory_end & PAGE_MASK);
-	max_mapnr = MAP_NR(high_memory);
-
-	/* this will put all low memory onto the freelists */
-	memblock_free_all();
-}

arch/h8300/mm/memory.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/h8300/mm/memory.c
- *
- *  Copyright (C) 2002  Yoshinori Sato <[e-mail]>,
- *
- *  Based on:
- *
- *  linux/arch/m68knommu/mm/memory.c
- *
- *  Copyright (C) 1998  Kenneth Albanowski <[e-mail]>,
- *  Copyright (C) 1999-2002, Greg Ungerer ([e-mail])
- *
- *  Based on:
- *
- *  linux/arch/m68k/mm/memory.c
- *
- *  Copyright (C) 1995  Hamish Macdonald
- */
-
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/types.h>
-
-#include <asm/setup.h>
-#include <asm/page.h>
-#include <asm/traps.h>
-#include <asm/io.h>
-
-void cache_clear(unsigned long paddr, int len)
-{
-}
-
-
-void cache_push(unsigned long paddr, int len)
-{
-}
-
-void cache_push_v(unsigned long vaddr, int len)
-{
-}
-
-/*
- * Map some physical address range into the kernel address space.
- */
-
-unsigned long kernel_map(unsigned long paddr, unsigned long size,
-			 int nocacheflag, unsigned long *memavailp)
-{
-	return paddr;
-}

arch/mips/include/uapi/asm/stat.h

···
 struct stat {
 	unsigned	st_dev;
 	long		st_pad1[3];		/* Reserved for network id */
-	ino_t		st_ino;
-	mode_t		st_mode;
+	__kernel_ino_t	st_ino;
+	__kernel_mode_t	st_mode;
 	__u32		st_nlink;
-	uid_t		st_uid;
-	gid_t		st_gid;
+	__kernel_uid_t	st_uid;
+	__kernel_gid_t	st_gid;
 	unsigned	st_rdev;
 	long		st_pad2[2];
 	long		st_size;
···
 
 	unsigned long long	st_ino;
 
-	mode_t		st_mode;
+	__kernel_mode_t	st_mode;
 	__u32		st_nlink;
 
-	uid_t		st_uid;
-	gid_t		st_gid;
+	__kernel_uid_t	st_uid;
+	__kernel_gid_t	st_gid;
 
 	unsigned long	st_rdev;
 	unsigned long	st_pad1[3];	/* Reserved for st_rdev expansion  */
···
 
 	unsigned long		st_ino;
 
-	mode_t			st_mode;
+	__kernel_mode_t		st_mode;
 	__u32			st_nlink;
 
-	uid_t			st_uid;
-	gid_t			st_gid;
+	__kernel_uid_t		st_uid;
+	__kernel_gid_t		st_gid;
 
 	unsigned int		st_rdev;
 	unsigned int		st_pad1[3]; /* Reserved for st_rdev expansion */

arch/openrisc/Kconfig

···
 	select HAVE_DEBUG_STACKOVERFLOW
 	select OR1K_PIC
 	select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1
-	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_USE_QUEUED_RWLOCKS
 	select OMPIC if SMP
 	select ARCH_WANT_FRAME_POINTERS

arch/openrisc/include/asm/Kbuild

···
 # SPDX-License-Identifier: GPL-2.0
 generic-y += extable.h
 generic-y += kvm_para.h
-generic-y += mcs_spinlock.h
-generic-y += qspinlock_types.h
-generic-y += qspinlock.h
+generic-y += spinlock_types.h
+generic-y += spinlock.h
 generic-y += qrwlock_types.h
 generic-y += qrwlock.h
 generic-y += user.h

arch/openrisc/include/asm/spinlock.h

···
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * OpenRISC Linux
- *
- * Linux architectural port borrowing liberally from similar works of
- * others.  All original copyrights apply as per the original source
- * declaration.
- *
- * OpenRISC implementation:
- * Copyright (C) 2003 Matjaz Breskvar <[e-mail]>
- * Copyright (C) 2010-2011 Jonas Bonn <[e-mail]>
- * et al.
- */
-
-#ifndef __ASM_OPENRISC_SPINLOCK_H
-#define __ASM_OPENRISC_SPINLOCK_H
-
-#include <asm/qspinlock.h>
-
-#include <asm/qrwlock.h>
-
-#define arch_spin_relax(lock)	cpu_relax()
-#define arch_read_relax(lock)	cpu_relax()
-#define arch_write_relax(lock)	cpu_relax()
-
-
-#endif

arch/openrisc/include/asm/spinlock_types.h

···
-#ifndef _ASM_OPENRISC_SPINLOCK_TYPES_H
-#define _ASM_OPENRISC_SPINLOCK_TYPES_H
-
-#include <asm/qspinlock_types.h>
-#include <asm/qrwlock_types.h>
-
-#endif /* _ASM_OPENRISC_SPINLOCK_TYPES_H */

arch/powerpc/include/uapi/asm/stat.h

···
 
 struct stat {
 	unsigned long	st_dev;
-	ino_t		st_ino;
+	__kernel_ino_t	st_ino;
 #ifdef __powerpc64__
 	unsigned long	st_nlink;
-	mode_t		st_mode;
+	__kernel_mode_t	st_mode;
 #else
-	mode_t		st_mode;
+	__kernel_mode_t	st_mode;
 	unsigned short	st_nlink;
 #endif
-	uid_t		st_uid;
-	gid_t		st_gid;
+	__kernel_uid_t	st_uid;
+	__kernel_gid_t	st_gid;
 	unsigned long	st_rdev;
 	long		st_size;
 	unsigned long	st_blksize;

arch/riscv/Kconfig

···
 	select ARCH_SUPPORTS_DEBUG_PAGEALLOC if MMU
 	select ARCH_SUPPORTS_HUGETLBFS if MMU
 	select ARCH_USE_MEMTEST
+	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_GENERAL_HUGETLB

arch/riscv/include/asm/Kbuild

···
 generic-y += flat.h
 generic-y += kvm_para.h
 generic-y += parport.h
+generic-y += spinlock.h
+generic-y += spinlock_types.h
+generic-y += qrwlock.h
+generic-y += qrwlock_types.h
 generic-y += user.h
 generic-y += vmlinux.lds.h

arch/riscv/include/asm/spinlock.h

···
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2015 Regents of the University of California
- * Copyright (C) 2017 SiFive
- */
-
-#ifndef _ASM_RISCV_SPINLOCK_H
-#define _ASM_RISCV_SPINLOCK_H
-
-#include <linux/kernel.h>
-#include <asm/current.h>
-#include <asm/fence.h>
-
-/*
- * Simple spin lock operations.  These provide no fairness guarantees.
- */
-
-/* FIXME: Replace this with a ticket lock, like MIPS. */
-
-#define arch_spin_is_locked(x)	(READ_ONCE((x)->lock) != 0)
-
-static inline void arch_spin_unlock(arch_spinlock_t *lock)
-{
-	smp_store_release(&lock->lock, 0);
-}
-
-static inline int arch_spin_trylock(arch_spinlock_t *lock)
-{
-	int tmp = 1, busy;
-
-	__asm__ __volatile__ (
-		"	amoswap.w %0, %2, %1\n"
-		RISCV_ACQUIRE_BARRIER
-		: "=r" (busy), "+A" (lock->lock)
-		: "r" (tmp)
-		: "memory");
-
-	return !busy;
-}
-
-static inline void arch_spin_lock(arch_spinlock_t *lock)
-{
-	while (1) {
-		if (arch_spin_is_locked(lock))
-			continue;
-
-		if (arch_spin_trylock(lock))
-			break;
-	}
-}
-
-/***********************************************************/
-
-static inline void arch_read_lock(arch_rwlock_t *lock)
-{
-	int tmp;
-
-	__asm__ __volatile__(
-		"1:	lr.w	%1, %0\n"
-		"	bltz	%1, 1b\n"
-		"	addi	%1, %1, 1\n"
-		"	sc.w	%1, %1, %0\n"
-		"	bnez	%1, 1b\n"
-		RISCV_ACQUIRE_BARRIER
-		: "+A" (lock->lock), "=&r" (tmp)
-		:: "memory");
-}
-
-static inline void arch_write_lock(arch_rwlock_t *lock)
-{
-	int tmp;
-
-	__asm__ __volatile__(
-		"1:	lr.w	%1, %0\n"
-		"	bnez	%1, 1b\n"
-		"	li	%1, -1\n"
-		"	sc.w	%1, %1, %0\n"
-		"	bnez	%1, 1b\n"
-		RISCV_ACQUIRE_BARRIER
-		: "+A" (lock->lock), "=&r" (tmp)
-		:: "memory");
-}
-
-static inline int arch_read_trylock(arch_rwlock_t *lock)
-{
-	int busy;
-
-	__asm__ __volatile__(
-		"1:	lr.w	%1, %0\n"
-		"	bltz	%1, 1f\n"
-		"	addi	%1, %1, 1\n"
-		"	sc.w	%1, %1, %0\n"
-		"	bnez	%1, 1b\n"
-		RISCV_ACQUIRE_BARRIER
-		"1:\n"
-		: "+A" (lock->lock), "=&r" (busy)
-		:: "memory");
-
-	return !busy;
-}
-
-static inline int arch_write_trylock(arch_rwlock_t *lock)
-{
-	int busy;
-
-	__asm__ __volatile__(
-		"1:	lr.w	%1, %0\n"
-		"	bnez	%1, 1f\n"
-		"	li	%1, -1\n"
-		"	sc.w	%1, %1, %0\n"
-		"	bnez	%1, 1b\n"
-		RISCV_ACQUIRE_BARRIER
-		"1:\n"
-		: "+A" (lock->lock), "=&r" (busy)
-		:: "memory");
-
-	return !busy;
-}
-
-static inline void arch_read_unlock(arch_rwlock_t *lock)
-{
-	__asm__ __volatile__(
-		RISCV_RELEASE_BARRIER
-		"	amoadd.w x0, %1, %0\n"
-		: "+A" (lock->lock)
-		: "r" (-1)
-		: "memory");
-}
-
-static inline void arch_write_unlock(arch_rwlock_t *lock)
-{
-	smp_store_release(&lock->lock, 0);
-}
-
-#endif /* _ASM_RISCV_SPINLOCK_H */

arch/riscv/include/asm/spinlock_types.h

···
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2015 Regents of the University of California
- */
-
-#ifndef _ASM_RISCV_SPINLOCK_TYPES_H
-#define _ASM_RISCV_SPINLOCK_TYPES_H
-
-#ifndef __LINUX_SPINLOCK_TYPES_RAW_H
-# error "please don't include this file directly"
-#endif
-
-typedef struct {
-	volatile unsigned int lock;
-} arch_spinlock_t;
-
-#define __ARCH_SPIN_LOCK_UNLOCKED	{ 0 }
-
-typedef struct {
-	volatile unsigned int lock;
-} arch_rwlock_t;
-
-#define __ARCH_RW_LOCK_UNLOCKED		{ 0 }
-
-#endif /* _ASM_RISCV_SPINLOCK_TYPES_H */

arch/sparc/include/uapi/asm/stat.h

···
 /* 64 bit sparc */
 struct stat {
 	unsigned int st_dev;
-	ino_t   st_ino;
-	mode_t  st_mode;
+	__kernel_ino_t st_ino;
+	__kernel_mode_t st_mode;
 	short   st_nlink;
-	uid_t   st_uid;
-	gid_t   st_gid;
+	__kernel_uid_t st_uid;
+	__kernel_gid_t st_gid;
 	unsigned int st_rdev;
 	long    st_size;
 	long    st_atime;
···
 /* 32 bit sparc */
 struct stat {
 	unsigned short	st_dev;
-	ino_t		st_ino;
-	mode_t		st_mode;
+	__kernel_ino_t	st_ino;
+	__kernel_mode_t	st_mode;
 	short		st_nlink;
 	unsigned short	st_uid;
 	unsigned short	st_gid;

drivers/clk/Makefile

···
 obj-y					+= bcm/
 obj-$(CONFIG_ARCH_BERLIN)		+= berlin/
 obj-$(CONFIG_ARCH_DAVINCI)		+= davinci/
-obj-$(CONFIG_H8300)			+= h8300/
 obj-$(CONFIG_ARCH_HISI)			+= hisilicon/
 obj-y					+= imgtec/
 obj-y					+= imx/

drivers/clk/h8300/Makefile

···
-# SPDX-License-Identifier: GPL-2.0-only
-obj-y += clk-div.o
-obj-$(CONFIG_H8S2678) += clk-h8s2678.o

drivers/clk/h8300/clk-div.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * H8/300 divide clock driver
- *
- * Copyright 2015 Yoshinori Sato <[e-mail]>
- */
-
-#include <linux/clk-provider.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-
-static DEFINE_SPINLOCK(clklock);
-
-static void __init h8300_div_clk_setup(struct device_node *node)
-{
-	unsigned int num_parents;
-	struct clk_hw *hw;
-	const char *clk_name = node->name;
-	const char *parent_name;
-	void __iomem *divcr = NULL;
-	int width;
-	int offset;
-
-	num_parents = of_clk_get_parent_count(node);
-	if (!num_parents) {
-		pr_err("%s: no parent found\n", clk_name);
-		return;
-	}
-
-	divcr = of_iomap(node, 0);
-	if (divcr == NULL) {
-		pr_err("%s: failed to map divide register\n", clk_name);
-		goto error;
-	}
-	offset = (unsigned long)divcr & 3;
-	offset = (3 - offset) * 8;
-	divcr = (void __iomem *)((unsigned long)divcr & ~3);
-
-	parent_name = of_clk_get_parent_name(node, 0);
-	of_property_read_u32(node, "renesas,width", &width);
-	hw = clk_hw_register_divider(NULL, clk_name, parent_name,
-				   CLK_SET_RATE_GATE, divcr, offset, width,
-				   CLK_DIVIDER_POWER_OF_TWO, &clklock);
-	if (!IS_ERR(hw)) {
-		of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw);
-		return;
-	}
-	pr_err("%s: failed to register %s div clock (%ld)\n",
-	       __func__, clk_name, PTR_ERR(hw));
-error:
-	if (divcr)
-		iounmap(divcr);
-}
-
-CLK_OF_DECLARE(h8300_div_clk, "renesas,h8300-div-clock", h8300_div_clk_setup);

drivers/clk/h8300/clk-h8s2678.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * H8S2678 clock driver
- *
- * Copyright 2015 Yoshinori Sato <[e-mail]>
- */
-
-#include <linux/clk-provider.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/err.h>
-#include <linux/of_address.h>
-#include <linux/slab.h>
-
-static DEFINE_SPINLOCK(clklock);
-
-#define MAX_FREQ 33333333
-#define MIN_FREQ  8000000
-
-struct pll_clock {
-	struct clk_hw hw;
-	void __iomem *sckcr;
-	void __iomem *pllcr;
-};
-
-#define to_pll_clock(_hw) container_of(_hw, struct pll_clock, hw)
-
-static unsigned long pll_recalc_rate(struct clk_hw *hw,
-		unsigned long parent_rate)
-{
-	struct pll_clock *pll_clock = to_pll_clock(hw);
-	int mul = 1 << (readb(pll_clock->pllcr) & 3);
-
-	return parent_rate * mul;
-}
-
-static long pll_round_rate(struct clk_hw *hw, unsigned long rate,
-				unsigned long *prate)
-{
-	int i, m = -1;
-	long offset[3];
-
-	if (rate > MAX_FREQ)
-		rate = MAX_FREQ;
-	if (rate < MIN_FREQ)
-		rate = MIN_FREQ;
-
-	for (i = 0; i < 3; i++)
-		offset[i] = abs(rate - (*prate * (1 << i)));
-	for (i = 0; i < 3; i++)
-		if (m < 0)
-			m = i;
-		else
-			m = (offset[i] < offset[m])?i:m;
-
-	return *prate * (1 << m);
-}
-
-static int pll_set_rate(struct clk_hw *hw, unsigned long rate,
-			unsigned long parent_rate)
-{
-	int pll;
-	unsigned char val;
-	unsigned long flags;
-	struct pll_clock *pll_clock = to_pll_clock(hw);
-
-	pll = ((rate / parent_rate) / 2) & 0x03;
-	spin_lock_irqsave(&clklock, flags);
-	val = readb(pll_clock->sckcr);
-	val |= 0x08;
-	writeb(val, pll_clock->sckcr);
-	val = readb(pll_clock->pllcr);
-	val &= ~0x03;
-	val |= pll;
-	writeb(val, pll_clock->pllcr);
-	spin_unlock_irqrestore(&clklock, flags);
-	return 0;
-}
-
-static const struct clk_ops pll_ops = {
-	.recalc_rate = pll_recalc_rate,
-	.round_rate = pll_round_rate,
-	.set_rate = pll_set_rate,
-};
-
-static void __init h8s2678_pll_clk_setup(struct device_node *node)
-{
-	unsigned int num_parents;
-	const char *clk_name = node->name;
-	const char *parent_name;
-	struct pll_clock *pll_clock;
-	struct clk_init_data init;
-	int ret;
-
-	num_parents = of_clk_get_parent_count(node);
-	if (!num_parents) {
-		pr_err("%s: no parent found\n", clk_name);
-		return;
-	}
-
-
-	pll_clock = kzalloc(sizeof(*pll_clock), GFP_KERNEL);
-	if (!pll_clock)
-		return;
-
-	pll_clock->sckcr = of_iomap(node, 0);
-	if (pll_clock->sckcr == NULL) {
-		pr_err("%s: failed to map divide register\n", clk_name);
-		goto free_clock;
-	}
-
-	pll_clock->pllcr = of_iomap(node, 1);
-	if (pll_clock->pllcr == NULL) {
-		pr_err("%s: failed to map multiply register\n", clk_name);
-		goto unmap_sckcr;
-	}
-
-	parent_name = of_clk_get_parent_name(node, 0);
-	init.name = clk_name;
-	init.ops = &pll_ops;
-	init.flags = 0;
-	init.parent_names = &parent_name;
-	init.num_parents = 1;
-	pll_clock->hw.init = &init;
-
-	ret = clk_hw_register(NULL, &pll_clock->hw);
-	if (ret) {
-		pr_err("%s: failed to register %s div clock (%d)\n",
-		       __func__, clk_name, ret);
-		goto unmap_pllcr;
-	}
-
-	of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll_clock->hw);
-	return;
-
-unmap_pllcr:
-	iounmap(pll_clock->pllcr);
-unmap_sckcr:
-	iounmap(pll_clock->sckcr);
-free_clock:
-	kfree(pll_clock);
-}
-
-CLK_OF_DECLARE(h8s2678_div_clk, "renesas,h8s2678-pll-clock",
-	       h8s2678_pll_clk_setup);

drivers/clocksource/Kconfig

···
 	  This enables OST0 support available on PXA and SA-11x0
 	  platforms.
 
-config H8300_TMR8
-	bool "Clockevent timer for the H8300 platform" if COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  This enables the 8 bits timer for the H8300 platform.
-
-config H8300_TMR16
-	bool "Clockevent timer for the H83069 platform" if COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  This enables the 16 bits timer for the H8300 platform with the
-	  H83069 CPU.
-
-config H8300_TPU
-	bool "Clocksource for the H8300 platform" if COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  This enables the clocksource for the H8300 platform with the
-	  H8S2678 CPU.
-
 config CLKSRC_IMX_GPT
 	bool "Clocksource using i.MX GPT" if COMPILE_TEST
 	depends on (ARM || ARM64) && HAVE_CLK

drivers/clocksource/Makefile

···
 obj-$(CONFIG_CLKSRC_IMX_TPM)		+= timer-imx-tpm.o
 obj-$(CONFIG_TIMER_IMX_SYS_CTR)		+= timer-imx-sysctr.o
 obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
-obj-$(CONFIG_H8300_TMR8)		+= h8300_timer8.o
-obj-$(CONFIG_H8300_TMR16)		+= h8300_timer16.o
-obj-$(CONFIG_H8300_TPU)			+= h8300_tpu.o
 obj-$(CONFIG_INGENIC_OST)		+= ingenic-ost.o
 obj-$(CONFIG_INGENIC_SYSOST)	+= ingenic-sysost.o
 obj-$(CONFIG_INGENIC_TIMER)		+= ingenic-timer.o

drivers/clocksource/h8300_timer16.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  H8/300 16bit Timer driver
- *
- *  Copyright 2015 Yoshinori Sato <[e-mail]>
- */
-
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/clocksource.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#define TSTR	0
-#define TISRC	6
-
-#define TCR	0
-#define TCNT	2
-
-#define bset(b, a) iowrite8(ioread8(a) | (1 << (b)), (a))
-#define bclr(b, a) iowrite8(ioread8(a) & ~(1 << (b)), (a))
-
-struct timer16_priv {
-	struct clocksource cs;
-	unsigned long total_cycles;
-	void __iomem *mapbase;
-	void __iomem *mapcommon;
-	unsigned short cs_enabled;
-	unsigned char enb;
-	unsigned char ovf;
-	unsigned char ovie;
-};
-
-static unsigned long timer16_get_counter(struct timer16_priv *p)
-{
-	unsigned short v1, v2, v3;
-	unsigned char  o1, o2;
-
-	o1 = ioread8(p->mapcommon + TISRC) & p->ovf;
-
-	/* Make sure the timer value is stable. Stolen from acpi_pm.c */
-	do {
-		o2 = o1;
-		v1 = ioread16be(p->mapbase + TCNT);
-		v2 = ioread16be(p->mapbase + TCNT);
-		v3 = ioread16be(p->mapbase + TCNT);
-		o1 = ioread8(p->mapcommon + TISRC) & p->ovf;
-	} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
-			  || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
-
-	if (likely(!o1))
-		return v2;
-	else
-		return v2 + 0x10000;
-}
-
-
-static irqreturn_t timer16_interrupt(int irq, void *dev_id)
-{
-	struct timer16_priv *p = (struct timer16_priv *)dev_id;
-
-	bclr(p->ovf, p->mapcommon + TISRC);
-	p->total_cycles += 0x10000;
-
-	return IRQ_HANDLED;
-}
-
-static inline struct timer16_priv *cs_to_priv(struct clocksource *cs)
-{
-	return container_of(cs, struct timer16_priv, cs);
-}
-
-static u64 timer16_clocksource_read(struct clocksource *cs)
-{
-	struct timer16_priv *p = cs_to_priv(cs);
-	unsigned long raw, value;
-
-	value = p->total_cycles;
-	raw = timer16_get_counter(p);
-
-	return value + raw;
-}
-
-static int timer16_enable(struct clocksource *cs)
-{
-	struct timer16_priv *p = cs_to_priv(cs);
-
-	WARN_ON(p->cs_enabled);
-
-	p->total_cycles = 0;
-	iowrite16be(0x0000, p->mapbase + TCNT);
-	iowrite8(0x83, p->mapbase + TCR);
-	bset(p->ovie, p->mapcommon + TISRC);
-	bset(p->enb, p->mapcommon + TSTR);
-
-	p->cs_enabled = true;
-	return 0;
-}
-
-static void timer16_disable(struct clocksource *cs)
-{
-	struct timer16_priv *p = cs_to_priv(cs);
-
-	WARN_ON(!p->cs_enabled);
-
-	bclr(p->ovie, p->mapcommon + TISRC);
-	bclr(p->enb, p->mapcommon + TSTR);
-
-	p->cs_enabled = false;
-}
-
-static struct timer16_priv timer16_priv = {
-	.cs = {
-		.name = "h8300_16timer",
-		.rating = 200,
-		.read = timer16_clocksource_read,
-		.enable = timer16_enable,
-		.disable = timer16_disable,
-		.mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8),
-		.flags = CLOCK_SOURCE_IS_CONTINUOUS,
-	},
-};
-
-#define REG_CH   0
-#define REG_COMM 1
-
-static int __init h8300_16timer_init(struct device_node *node)
-{
-	void __iomem *base[2];
-	int ret, irq;
-	unsigned int ch;
-	struct clk *clk;
-
-	clk = of_clk_get(node, 0);
-	if (IS_ERR(clk)) {
-		pr_err("failed to get clock for clocksource\n");
-		return PTR_ERR(clk);
-	}
-
-	ret = -ENXIO;
-	base[REG_CH] = of_iomap(node, 0);
-	if (!base[REG_CH]) {
-		pr_err("failed to map registers for clocksource\n");
-		goto free_clk;
-	}
-
-	base[REG_COMM] = of_iomap(node, 1);
-	if (!base[REG_COMM]) {
-		pr_err("failed to map registers for clocksource\n");
-		goto unmap_ch;
-	}
-
-	ret = -EINVAL;
-	irq = irq_of_parse_and_map(node, 0);
-	if (!irq) {
-		pr_err("failed to get irq for clockevent\n");
-		goto unmap_comm;
-	}
-
-	of_property_read_u32(node, "renesas,channel", &ch);
-
-	timer16_priv.mapbase = base[REG_CH];
-	timer16_priv.mapcommon = base[REG_COMM];
-	timer16_priv.enb = ch;
-	timer16_priv.ovf = ch;
-	timer16_priv.ovie = 4 + ch;
-
-	ret = request_irq(irq, timer16_interrupt,
-			  IRQF_TIMER, timer16_priv.cs.name, &timer16_priv);
-	if (ret < 0) {
-		pr_err("failed to request irq %d of clocksource\n", irq);
-		goto unmap_comm;
-	}
-
-	clocksource_register_hz(&timer16_priv.cs,
-				clk_get_rate(clk) / 8);
-	return 0;
-
-unmap_comm:
-	iounmap(base[REG_COMM]);
-unmap_ch:
-	iounmap(base[REG_CH]);
-free_clk:
-	clk_put(clk);
-	return ret;
-}
-
-TIMER_OF_DECLARE(h8300_16bit, "renesas,16bit-timer",
-			   h8300_16timer_init);

drivers/clocksource/h8300_timer8.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/h8300/kernel/cpu/timer/timer8.c
- *
- *  Yoshinori Sato <[e-mail]>
- *
- *  8bit Timer driver
- *
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/clockchips.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#define _8TCR	0
-#define _8TCSR	2
-#define TCORA	4
-#define TCORB	6
-#define _8TCNT	8
-
-#define CMIEA	6
-#define CMFA	6
-
-#define FLAG_STARTED (1 << 3)
-
-#define SCALE 64
-
-#define bset(b, a) iowrite8(ioread8(a) | (1 << (b)), (a))
-#define bclr(b, a) iowrite8(ioread8(a) & ~(1 << (b)), (a))
-
-struct timer8_priv {
-	struct clock_event_device ced;
-	void __iomem *mapbase;
-	unsigned long flags;
-	unsigned int rate;
-};
-
-static irqreturn_t timer8_interrupt(int irq, void *dev_id)
-{
-	struct timer8_priv *p = dev_id;
-
-	if (clockevent_state_oneshot(&p->ced))
-		iowrite16be(0x0000, p->mapbase + _8TCR);
-
-	p->ced.event_handler(&p->ced);
-
-	bclr(CMFA, p->mapbase + _8TCSR);
-
-	return IRQ_HANDLED;
-}
-
-static void timer8_set_next(struct timer8_priv *p, unsigned long delta)
-{
-	if (delta >= 0x10000)
-		pr_warn("delta out of range\n");
-	bclr(CMIEA, p->mapbase + _8TCR);
-	iowrite16be(delta, p->mapbase + TCORA);
-	iowrite16be(0x0000, p->mapbase + _8TCNT);
-	bclr(CMFA, p->mapbase + _8TCSR);
-	bset(CMIEA, p->mapbase + _8TCR);
-}
-
-static int timer8_enable(struct timer8_priv *p)
-{
-	iowrite16be(0xffff, p->mapbase + TCORA);
-	iowrite16be(0x0000, p->mapbase + _8TCNT);
-	iowrite16be(0x0c02, p->mapbase + _8TCR);
-
-	return 0;
-}
-
-static int timer8_start(struct timer8_priv *p)
-{
-	int ret;
-
-	if ((p->flags & FLAG_STARTED))
-		return 0;
-
-	ret = timer8_enable(p);
-	if (!ret)
-		p->flags |= FLAG_STARTED;
-
-	return ret;
-}
-
-static void timer8_stop(struct timer8_priv *p)
-{
-	iowrite16be(0x0000, p->mapbase + _8TCR);
-}
-
-static inline struct timer8_priv *ced_to_priv(struct clock_event_device *ced)
-{
-	return container_of(ced, struct timer8_priv, ced);
-}
-
-static void timer8_clock_event_start(struct timer8_priv *p, unsigned long delta)
-{
-	timer8_start(p);
-	timer8_set_next(p, delta);
-}
-
-static int timer8_clock_event_shutdown(struct clock_event_device *ced)
-{
-	timer8_stop(ced_to_priv(ced));
-	return 0;
-}
-
-static int timer8_clock_event_periodic(struct clock_event_device *ced)
-{
-	struct timer8_priv *p = ced_to_priv(ced);
-
-	pr_info("%s: used for periodic clock events\n", ced->name);
-	timer8_stop(p);
-	timer8_clock_event_start(p, (p->rate + HZ/2) / HZ);
-
-	return 0;
-}
-
-static int timer8_clock_event_oneshot(struct clock_event_device *ced)
-{
-	struct timer8_priv *p = ced_to_priv(ced);
-
-	pr_info("%s: used for oneshot clock events\n", ced->name);
-	timer8_stop(p);
-	timer8_clock_event_start(p, 0x10000);
-
-	return 0;
-}
-
-static int timer8_clock_event_next(unsigned long delta,
-				   struct clock_event_device *ced)
-{
-	struct timer8_priv *p = ced_to_priv(ced);
-
-	BUG_ON(!clockevent_state_oneshot(ced));
-	timer8_set_next(p, delta - 1);
-
-	return 0;
-}
-
-static struct timer8_priv timer8_priv = {
-	.ced = {
-		.name = "h8300_8timer",
-		.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-		.rating = 200,
-		.set_next_event = timer8_clock_event_next,
-		.set_state_shutdown = timer8_clock_event_shutdown,
-		.set_state_periodic = timer8_clock_event_periodic,
-		.set_state_oneshot = timer8_clock_event_oneshot,
-	},
-};
-
-static int __init h8300_8timer_init(struct device_node *node)
-{
-	void __iomem *base;
-	int irq, ret;
-	struct clk *clk;
-
-	clk = of_clk_get(node, 0);
-	if (IS_ERR(clk)) {
-		pr_err("failed to get clock for clockevent\n");
-		return PTR_ERR(clk);
-	}
-
-	ret = -ENXIO;
-	base = of_iomap(node, 0);
-	if (!base) {
-		pr_err("failed to map registers for clockevent\n");
-		goto free_clk;
-	}
-
-	ret = -EINVAL;
-	irq = irq_of_parse_and_map(node, 0);
-	if (!irq) {
-		pr_err("failed to get irq for clockevent\n");
-		goto unmap_reg;
-	}
-
-	timer8_priv.mapbase = base;
-
-	timer8_priv.rate = clk_get_rate(clk) / SCALE;
-	if (!timer8_priv.rate) {
-		pr_err("Failed to get rate for the clocksource\n");
-		goto unmap_reg;
-	}
-
-	if (request_irq(irq, timer8_interrupt, IRQF_TIMER,
-			timer8_priv.ced.name, &timer8_priv) < 0) {
-		pr_err("failed to request irq %d for clockevent\n", irq);
-		goto unmap_reg;
-	}
-
-	clockevents_config_and_register(&timer8_priv.ced,
-					timer8_priv.rate, 1, 0x0000ffff);
-
-	return 0;
-unmap_reg:
-	iounmap(base);
-free_clk:
-	clk_put(clk);
-	return ret;
-}
-
-TIMER_OF_DECLARE(h8300_8bit, "renesas,8bit-timer", h8300_8timer_init);

drivers/clocksource/h8300_tpu.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  H8S TPU Driver
- *
- *  Copyright 2015 Yoshinori Sato <[e-mail]>
- *
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/clocksource.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#define TCR	0x0
-#define TSR	0x5
-#define TCNT	0x6
-
-#define TCFV	0x10
-
-struct tpu_priv {
-	struct clocksource cs;
-	void __iomem *mapbase1;
-	void __iomem *mapbase2;
-	raw_spinlock_t lock;
-	unsigned int cs_enabled;
-};
-
-static inline unsigned long read_tcnt32(struct tpu_priv *p)
-{
-	unsigned long tcnt;
-
-	tcnt = ioread16be(p->mapbase1 + TCNT) << 16;
-	tcnt |= ioread16be(p->mapbase2 + TCNT);
-	return tcnt;
-}
-
-static int tpu_get_counter(struct tpu_priv *p, unsigned long long *val)
-{
-	unsigned long v1, v2, v3;
-	int o1, o2;
-
-	o1 = ioread8(p->mapbase1 + TSR) & TCFV;
-
-	/* Make sure the timer value is stable. Stolen from acpi_pm.c */
-	do {
-		o2 = o1;
-		v1 = read_tcnt32(p);
-		v2 = read_tcnt32(p);
-		v3 = read_tcnt32(p);
-		o1 = ioread8(p->mapbase1 + TSR) & TCFV;
-	} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
-			  || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
-
-	*val = v2;
-	return o1;
-}
-
-static inline struct tpu_priv *cs_to_priv(struct clocksource *cs)
-{
-	return container_of(cs, struct tpu_priv, cs);
-}
-
-static u64 tpu_clocksource_read(struct clocksource *cs)
-{
-	struct tpu_priv *p = cs_to_priv(cs);
-	unsigned long flags;
-	unsigned long long value;
-
-	raw_spin_lock_irqsave(&p->lock, flags);
-	if (tpu_get_counter(p, &value))
-		value += 0x100000000;
-	raw_spin_unlock_irqrestore(&p->lock, flags);
-
-	return value;
-}
-
-static int tpu_clocksource_enable(struct clocksource *cs)
-{
-	struct tpu_priv *p = cs_to_priv(cs);
-
-	WARN_ON(p->cs_enabled);
-
-	iowrite16be(0, p->mapbase1 + TCNT);
-	iowrite16be(0, p->mapbase2 + TCNT);
-	iowrite8(0x0f, p->mapbase1 + TCR);
-	iowrite8(0x03, p->mapbase2 + TCR);
-
-	p->cs_enabled = true;
-	return 0;
-}
-
-static void tpu_clocksource_disable(struct clocksource *cs)
-{
-	struct tpu_priv *p = cs_to_priv(cs);
-
-	WARN_ON(!p->cs_enabled);
-
-	iowrite8(0, p->mapbase1 + TCR);
-	iowrite8(0, p->mapbase2 + TCR);
-	p->cs_enabled = false;
-}
-
-static struct tpu_priv tpu_priv = {
-	.cs = {
-		.name = "H8S_TPU",
-		.rating = 200,
-		.read = tpu_clocksource_read,
-		.enable = tpu_clocksource_enable,
-		.disable = tpu_clocksource_disable,
-		.mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8),
-		.flags = CLOCK_SOURCE_IS_CONTINUOUS,
-	},
-};
-
-#define CH_L 0
-#define CH_H 1
-
-static int __init h8300_tpu_init(struct device_node *node)
-{
-	void __iomem *base[2];
-	struct clk *clk;
-	int ret = -ENXIO;
-
-	clk = of_clk_get(node, 0);
-	if (IS_ERR(clk)) {
-		pr_err("failed to get clock for clocksource\n");
-		return PTR_ERR(clk);
-	}
-
-	base[CH_L] = of_iomap(node, CH_L);
-	if (!base[CH_L]) {
-		pr_err("failed to map registers for clocksource\n");
-		goto free_clk;
-	}
-	base[CH_H] = of_iomap(node, CH_H);
-	if (!base[CH_H]) {
-		pr_err("failed to map registers for clocksource\n");
-		goto unmap_L;
-	}
-
-	tpu_priv.mapbase1 = base[CH_L];
-	tpu_priv.mapbase2 = base[CH_H];
-
-	return clocksource_register_hz(&tpu_priv.cs, clk_get_rate(clk) / 64);
-
-unmap_L:
-	iounmap(base[CH_H]);
-free_clk:
-	clk_put(clk);
-	return ret;
-}
-
-TIMER_OF_DECLARE(h8300_tpu, "renesas,tpu", h8300_tpu_init);

drivers/irqchip/Kconfig

···
 
 	  If unsure, say N.
 
-config RENESAS_H8300H_INTC
-        bool
-	select IRQ_DOMAIN
-
-config RENESAS_H8S_INTC
-	bool "Renesas H8S Interrupt Controller Support" if COMPILE_TEST
-	select IRQ_DOMAIN
-	help
-	  Enable support for the Renesas H8/300 Interrupt Controller, as found
-	  on Renesas H8S SoCs.
-
 config IMX_GPCV2
 	bool
 	select IRQ_DOMAIN

drivers/irqchip/Makefile

···
 obj-$(CONFIG_MIPS_GIC)			+= irq-mips-gic.o
 obj-$(CONFIG_ARCH_MEDIATEK)		+= irq-mtk-sysirq.o irq-mtk-cirq.o
 obj-$(CONFIG_ARCH_DIGICOLOR)		+= irq-digicolor.o
-obj-$(CONFIG_RENESAS_H8300H_INTC)	+= irq-renesas-h8300h.o
-obj-$(CONFIG_RENESAS_H8S_INTC)		+= irq-renesas-h8s.o
 obj-$(CONFIG_ARCH_SA1100)		+= irq-sa11x0.o
 obj-$(CONFIG_INGENIC_IRQ)		+= irq-ingenic.o
 obj-$(CONFIG_INGENIC_TCU_IRQ)		+= irq-ingenic-tcu.o

drivers/irqchip/irq-renesas-h8300h.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * H8/300H interrupt controller driver
- *
- * Copyright 2015 Yoshinori Sato <[e-mail]>
- */
-
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/irqchip.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <asm/io.h>
-
-static const char ipr_bit[] = {
-	 7,  6,  5,  5,
-	 4,  4,  4,  4,  3,  3,  3,  3,
-	 2,  2,  2,  2,  1,  1,  1,  1,
-	 0,  0,  0,  0, 15, 15, 15, 15,
-	14, 14, 14, 14, 13, 13, 13, 13,
-	-1, -1, -1, -1, 11, 11, 11, 11,
-	10, 10, 10, 10,  9,  9,  9,  9,
-};
-
-static void __iomem *intc_baseaddr;
-
-#define IPR (intc_baseaddr + 6)
-
-static void h8300h_disable_irq(struct irq_data *data)
-{
-	int bit;
-	int irq = data->irq - 12;
-
-	bit = ipr_bit[irq];
-	if (bit >= 0) {
-		if (bit < 8)
-			ctrl_bclr(bit & 7, IPR);
-		else
-			ctrl_bclr(bit & 7, (IPR+1));
-	}
-}
-
-static void h8300h_enable_irq(struct irq_data *data)
-{
-	int bit;
-	int irq = data->irq - 12;
-
-	bit = ipr_bit[irq];
-	if (bit >= 0) {
-		if (bit < 8)
-			ctrl_bset(bit & 7, IPR);
-		else
-			ctrl_bset(bit & 7, (IPR+1));
-	}
-}
-
-struct irq_chip h8300h_irq_chip = {
-	.name		= "H8/300H-INTC",
-	.irq_enable	= h8300h_enable_irq,
-	.irq_disable	= h8300h_disable_irq,
-};
-
-static int irq_map(struct irq_domain *h, unsigned int virq,
-		   irq_hw_number_t hw_irq_num)
-{
-       irq_set_chip_and_handler(virq, &h8300h_irq_chip, handle_simple_irq);
-
-       return 0;
-}
-
-static const struct irq_domain_ops irq_ops = {
-       .map    = irq_map,
-       .xlate  = irq_domain_xlate_onecell,
-};
-
-static int __init h8300h_intc_of_init(struct device_node *intc,
-				      struct device_node *parent)
-{
-	struct irq_domain *domain;
-
-	intc_baseaddr = of_iomap(intc, 0);
-	BUG_ON(!intc_baseaddr);
-
-	/* All interrupt priority low */
-	writeb(0x00, IPR + 0);
-	writeb(0x00, IPR + 1);
-
-	domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);
-	BUG_ON(!domain);
-	irq_set_default_host(domain);
-	return 0;
-}
-
-IRQCHIP_DECLARE(h8300h_intc, "renesas,h8300h-intc", h8300h_intc_of_init);

drivers/irqchip/irq-renesas-h8s.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * H8S interrupt controller driver
- *
- * Copyright 2015 Yoshinori Sato <[e-mail]>
- */
-
-#include <linux/irq.h>
-#include <linux/irqchip.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <asm/io.h>
-
-static void *intc_baseaddr;
-#define IPRA (intc_baseaddr)
-
-static const unsigned char ipr_table[] = {
-	0x03, 0x02, 0x01, 0x00, 0x13, 0x12, 0x11, 0x10, /* 16 - 23 */
-	0x23, 0x22, 0x21, 0x20, 0x33, 0x32, 0x31, 0x30, /* 24 - 31 */
-	0x43, 0x42, 0x41, 0x40, 0x53, 0x53, 0x52, 0x52, /* 32 - 39 */
-	0x51, 0x51, 0x51, 0x51, 0x51, 0x51, 0x51, 0x51, /* 40 - 47 */
-	0x50, 0x50, 0x50, 0x50, 0x63, 0x63, 0x63, 0x63, /* 48 - 55 */
-	0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, /* 56 - 63 */
-	0x61, 0x61, 0x61, 0x61, 0x60, 0x60, 0x60, 0x60, /* 64 - 71 */
-	0x73, 0x73, 0x73, 0x73, 0x72, 0x72, 0x72, 0x72, /* 72 - 79 */
-	0x71, 0x71, 0x71, 0x71, 0x70, 0x83, 0x82, 0x81, /* 80 - 87 */
-	0x80, 0x80, 0x80, 0x80, 0x93, 0x93, 0x93, 0x93, /* 88 - 95 */
-	0x92, 0x92, 0x92, 0x92, 0x91, 0x91, 0x91, 0x91, /* 96 - 103 */
-	0x90, 0x90, 0x90, 0x90, 0xa3, 0xa3, 0xa3, 0xa3, /* 104 - 111 */
-	0xa2, 0xa2, 0xa2, 0xa2, 0xa1, 0xa1, 0xa1, 0xa1, /* 112 - 119 */
-	0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, /* 120 - 127 */
-};
-
-static void h8s_disable_irq(struct irq_data *data)
-{
-	int pos;
-	void __iomem *addr;
-	unsigned short pri;
-	int irq = data->irq;
-
-	addr = IPRA + ((ipr_table[irq - 16] & 0xf0) >> 3);
-	pos = (ipr_table[irq - 16] & 0x0f) * 4;
-	pri = ~(0x000f << pos);
-	pri &= readw(addr);
-	writew(pri, addr);
-}
-
-static void h8s_enable_irq(struct irq_data *data)
-{
-	int pos;
-	void __iomem *addr;
-	unsigned short pri;
-	int irq = data->irq;
-
-	addr = IPRA + ((ipr_table[irq - 16] & 0xf0) >> 3);
-	pos = (ipr_table[irq - 16] & 0x0f) * 4;
-	pri = ~(0x000f << pos);
-	pri &= readw(addr);
-	pri |= 1 << pos;
-	writew(pri, addr);
-}
-
-struct irq_chip h8s_irq_chip = {
-	.name		= "H8S-INTC",
-	.irq_enable	= h8s_enable_irq,
-	.irq_disable	= h8s_disable_irq,
-};
-
-static __init int irq_map(struct irq_domain *h, unsigned int virq,
-			  irq_hw_number_t hw_irq_num)
-{
-       irq_set_chip_and_handler(virq, &h8s_irq_chip, handle_simple_irq);
-
-       return 0;
-}
-
-static const struct irq_domain_ops irq_ops = {
-       .map    = irq_map,
-       .xlate  = irq_domain_xlate_onecell,
-};
-
-static int __init h8s_intc_of_init(struct device_node *intc,
-				   struct device_node *parent)
-{
-	struct irq_domain *domain;
-	int n;
-
-	intc_baseaddr = of_iomap(intc, 0);
-	BUG_ON(!intc_baseaddr);
-
-	/* All interrupt priority is 0 (disable) */
-	/* IPRA to IPRK */
-	for (n = 0; n <= 'k' - 'a'; n++)
-		writew(0x0000, IPRA + (n * 2));
-
-	domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);
-	BUG_ON(!domain);
-	irq_set_default_host(domain);
-	return 0;
-}
-
-IRQCHIP_DECLARE(h8s_intc, "renesas,h8s-intc", h8s_intc_of_init);

drivers/net/ethernet/smsc/Kconfig

···
 	default y
 	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
 		   ISA || MAC || MIPS || NIOS2 || PCI || \
-		   PCMCIA || SUPERH || XTENSA || H8300 || COMPILE_TEST
+		   PCMCIA || SUPERH || XTENSA || COMPILE_TEST
 	help
 	  If you have a network (Ethernet) card belonging to this class, say Y.
 
···
 	select MII
 	depends on !OF || GPIOLIB
 	depends on ARM || ARM64 || ATARI_ETHERNAT || COLDFIRE || \
-		   MIPS || NIOS2 || SUPERH || XTENSA || H8300 || COMPILE_TEST
+		   MIPS || NIOS2 || SUPERH || XTENSA || COMPILE_TEST
 	help
 	  This is a driver for SMC's 91x series of Ethernet chipsets,
 	  including the SMC91C94 and the SMC91C111. Say Y if you want it

drivers/net/ethernet/smsc/smc91x.h

···
 
 #define SMC_IRQ_FLAGS		0
 
-#elif defined(CONFIG_H8300)
-#define SMC_CAN_USE_8BIT	1
-#define SMC_CAN_USE_16BIT	0
-#define SMC_CAN_USE_32BIT	0
-#define SMC_NOWAIT		0
-
-#define SMC_inb(a, r)		ioread8((a) + (r))
-#define SMC_outb(v, a, r)	iowrite8(v, (a) + (r))
-#define SMC_insb(a, r, p, l)	ioread8_rep((a) + (r), p, l)
-#define SMC_outsb(a, r, p, l)	iowrite8_rep((a) + (r), p, l)
-
 #else
 
 /*

drivers/tty/serial/Kconfig

···
 
 config SERIAL_SH_SCI
 	tristate "SuperH SCI(F) serial port support"
-	depends on SUPERH || ARCH_RENESAS || H8300 || COMPILE_TEST
+	depends on SUPERH || ARCH_RENESAS || COMPILE_TEST
 	select SERIAL_CORE
 	select SERIAL_MCTRL_GPIO if GPIOLIB
 
···
 	range 1 64 if 64BIT
 	range 1 32 if !64BIT
 	depends on SERIAL_SH_SCI
-	default "3" if H8300
 	default "10" if SUPERH
 	default "18" if ARCH_RENESAS
 	default "2"
···
 	depends on SERIAL_SH_SCI=y
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
-	default ARCH_RENESAS || H8300
+	default ARCH_RENESAS
 
 config SERIAL_SH_SCI_DMA
 	bool "DMA support" if EXPERT

include/asm-generic/qrwlock.h

···
 /*
  * Queue read/write lock
  *
+ * These use generic atomic and locking routines, but depend on a fair spinlock
+ * implementation in order to be fair themselves.  The implementation in
+ * asm-generic/spinlock.h meets these requirements.
+ *
  * (C) Copyright 2013-2014 Hewlett-Packard Development Company, L.P.
  *
  * Authors: Waiman Long <[e-mail]>

include/asm-generic/qspinlock.h

···
 /*
  * Queued spinlock
  *
+ * A 'generic' spinlock implementation that is based on MCS locks. For an
+ * architecture that's looking for a 'generic' spinlock, please first consider
+ * ticket-lock.h and only come looking here when you've considered all the
+ * constraints below and can show your hardware does actually perform better
+ * with qspinlock.
+ *
+ * qspinlock relies on atomic_*_release()/atomic_*_acquire() to be RCsc (or no
+ * weaker than RCtso if you're power), where regular code only expects atomic_t
+ * to be RCpc.
+ *
+ * qspinlock relies on a far greater (compared to asm-generic/spinlock.h) set
+ * of atomic operations to behave well together, please audit them carefully to
+ * ensure they all have forward progress. Many atomic operations may default to
+ * cmpxchg() loops which will not have good forward progress properties on
+ * LL/SC architectures.
+ *
+ * One notable example is atomic_fetch_or_acquire(), which x86 cannot (cheaply)
+ * do. Carefully read the patches that introduced
+ * queued_fetch_set_pending_acquire().
+ *
+ * qspinlock also heavily relies on mixed size atomic operations, in specific
+ * it requires architectures to have xchg16; something which many LL/SC
+ * architectures need to implement as a 32bit and+or in order to satisfy the
+ * forward progress guarantees mentioned above.
+ *
+ * Further reading on mixed size atomics that might be relevant:
+ *
+ *   http://www.cl.cam.ac.uk/~pes20/popl17/mixed-size.pdf
+ *
  * (C) Copyright 2013-2015 Hewlett-Packard Development Company, L.P.
  * (C) Copyright 2015 Hewlett-Packard Enterprise Development LP
  *

include/asm-generic/spinlock.h

···
 /* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * 'Generic' ticket-lock implementation.
+ *
+ * It relies on atomic_fetch_add() having well defined forward progress
+ * guarantees under contention. If your architecture cannot provide this, stick
+ * to a test-and-set lock.
+ *
+ * It also relies on atomic_fetch_add() being safe vs smp_store_release() on a
+ * sub-word of the value. This is generally true for anything LL/SC although
+ * you'd be hard pressed to find anything useful in architecture specifications
+ * about this. If your architecture cannot do this you might be better off with
+ * a test-and-set.
+ *
+ * It further assumes atomic_*_release() + atomic_*_acquire() is RCpc and hence
+ * uses atomic_fetch_add() which is RCsc to create an RCsc hot path, along with
+ * a full fence after the spin to upgrade the otherwise-RCpc
+ * atomic_cond_read_acquire().
+ *
+ * The implementation uses smp_cond_load_acquire() to spin, so if the
+ * architecture has WFE like instructions to sleep instead of poll for word
+ * modifications be sure to implement that (see ARM64 for example).
+ *
+ */
+
 #ifndef __ASM_GENERIC_SPINLOCK_H
 #define __ASM_GENERIC_SPINLOCK_H
-/*
- * You need to implement asm/spinlock.h for SMP support. The generic
- * version does not handle SMP.
- */
-#ifdef CONFIG_SMP
-#error need an architecture specific asm/spinlock.h
-#endif
+
+#include <linux/atomic.h>
+#include <asm-generic/spinlock_types.h>
+
+static __always_inline void arch_spin_lock(arch_spinlock_t *lock)
+{
+	u32 val = atomic_fetch_add(1<<16, lock);
+	u16 ticket = val >> 16;
+
+	if (ticket == (u16)val)
+		return;
+
+	/*
+	 * atomic_cond_read_acquire() is RCpc, but rather than defining a
+	 * custom cond_read_rcsc() here we just emit a full fence.  We only
+	 * need the prior reads before subsequent writes ordering from
+	 * smb_mb(), but as atomic_cond_read_acquire() just emits reads and we
+	 * have no outstanding writes due to the atomic_fetch_add() the extra
+	 * orderings are free.
+	 */
+	atomic_cond_read_acquire(lock, ticket == (u16)VAL);
+	smp_mb();
+}
+
+static __always_inline bool arch_spin_trylock(arch_spinlock_t *lock)
+{
+	u32 old = atomic_read(lock);
+
+	if ((old >> 16) != (old & 0xffff))
+		return false;
+
+	return atomic_try_cmpxchg(lock, &old, old + (1<<16)); /* SC, for RCsc */
+}
+
+static __always_inline void arch_spin_unlock(arch_spinlock_t *lock)
+{
+	u16 *ptr = (u16 *)lock + IS_ENABLED(CONFIG_CPU_BIG_ENDIAN);
+	u32 val = atomic_read(lock);
+
+	smp_store_release(ptr, (u16)val + 1);
+}
+
+static __always_inline int arch_spin_is_locked(arch_spinlock_t *lock)
+{
+	u32 val = atomic_read(lock);
+
+	return ((val >> 16) != (val & 0xffff));
+}
+
+static __always_inline int arch_spin_is_contended(arch_spinlock_t *lock)
+{
+	u32 val = atomic_read(lock);
+
+	return (s16)((val >> 16) - (val & 0xffff)) > 1;
+}
+
+static __always_inline int arch_spin_value_unlocked(arch_spinlock_t lock)
+{
+	return !arch_spin_is_locked(&lock);
+}
+
+#include <asm/qrwlock.h>
 
 #endif /* __ASM_GENERIC_SPINLOCK_H */

include/asm-generic/spinlock_types.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_GENERIC_SPINLOCK_TYPES_H
+#define __ASM_GENERIC_SPINLOCK_TYPES_H
+
+#include <linux/types.h>
+typedef atomic_t arch_spinlock_t;
+
+/*
+ * qrwlock_types depends on arch_spinlock_t, so we must typedef that before the
+ * include.
+ */
+#include <asm/qrwlock_types.h>
+
+#define __ARCH_SPIN_LOCK_UNLOCKED	ATOMIC_INIT(0)
+
+#endif /* __ASM_GENERIC_SPINLOCK_TYPES_H */

include/uapi/linux/agpgart.h

···
 
 #ifndef __KERNEL__
 #include <linux/types.h>
-#include <stdlib.h>
 
 struct agp_version {
 	__u16 major;
···
 	__u32 bridge_id;	/* bridge vendor/device         */
 	__u32 agp_mode;		/* mode info of bridge          */
 	unsigned long aper_base;/* base of aperture             */
-	size_t aper_size;	/* size of aperture             */
-	size_t pg_total;	/* max pages (swap + system)    */
-	size_t pg_system;	/* max pages (system)           */
-	size_t pg_used;		/* current pages used           */
+	__kernel_size_t aper_size;	/* size of aperture             */
+	__kernel_size_t pg_total;	/* max pages (swap + system)    */
+	__kernel_size_t pg_system;	/* max pages (system)           */
+	__kernel_size_t pg_used;	/* current pages used           */
 } agp_info;
 
 typedef struct _agp_setup {

init/Kconfig

···
 
 config LOG_BUF_SHIFT
 	int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
-	range 12 25 if !H8300
-	range 12 19 if H8300
+	range 12 25
 	default 17
 	depends on PRINTK
 	help

tools/arch/h8300/include/asm/bitsperlong.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_H8300_BITS_PER_LONG
-#define __ASM_H8300_BITS_PER_LONG
-
-#include <asm-generic/bitsperlong.h>
-
-#if !defined(__ASSEMBLY__)
-/* h8300-unknown-linux required long */
-#define __kernel_size_t __kernel_size_t
-typedef unsigned long	__kernel_size_t;
-typedef long		__kernel_ssize_t;
-typedef long		__kernel_ptrdiff_t;
-#endif
-
-#endif /* __ASM_H8300_BITS_PER_LONG */

tools/arch/h8300/include/uapi/asm/mman.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef TOOLS_ARCH_H8300_UAPI_ASM_MMAN_FIX_H
-#define TOOLS_ARCH_H8300_UAPI_ASM_MMAN_FIX_H
-#include <uapi/asm-generic/mman.h>
-/* MAP_32BIT is undefined on h8300, fix it for perf */
-#define MAP_32BIT	0
-#endif

usr/dummy-include/stdbool.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _STDBOOL_H
+#define _STDBOOL_H
+
+#error "Please do not include <stdbool.h> from exported headers"
+
+#endif /* _STDBOOL_H */

usr/dummy-include/stdlib.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _STDLIB_H
+#define _STDLIB_H
+
+#error "Please do not include <stdlib.h> from exported headers"
+
+#endif /* _STDLIB_H */

usr/include/Makefile

···
 # USERCFLAGS might contain sysroot location for CC.
 UAPI_CFLAGS += $(USERCFLAGS)
 
-override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I$(objtree)/usr/include
+override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I $(obj) -I $(srctree)/usr/dummy-include
 
 # The following are excluded for now because they fail to build.
 #
···
 no-header-test += linux/if_bonding.h
 endif
 
-ifeq ($(SRCARCH),mips)
-no-header-test += asm/stat.h
-endif
-
 ifeq ($(SRCARCH),powerpc)
-no-header-test += asm/stat.h
-no-header-test += linux/bpf_perf_event.h
-endif
-
-ifeq ($(SRCARCH),riscv)
 no-header-test += linux/bpf_perf_event.h
 endif
 
 ifeq ($(SRCARCH),sparc)
-no-header-test += asm/stat.h
 no-header-test += asm/uctx.h
 no-header-test += asm/fbio.h
 endif