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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_CSKY_PROCESSOR_H#define __ASM_CSKY_PROCESSOR_H
#include <linux/bitops.h>#include <linux/cache.h>#include <asm/ptrace.h>#include <asm/current.h>#include <abi/reg_ops.h>#include <abi/regdef.h>#include <abi/switch_context.h>#ifdef CONFIG_CPU_HAS_FPU#include <abi/fpu.h>#endif
struct cpuinfo_csky { unsigned long asid_cache;} __aligned(SMP_CACHE_BYTES);
extern struct cpuinfo_csky cpu_data[];
/* * User space process size: 2GB. This is hardcoded into a few places, * so don't change it unless you know what you are doing. TASK_SIZE * for a 64 bit kernel expandable to 8192EB, of which the current CSKY * implementations will "only" be able to use 1TB ... */#define TASK_SIZE (PAGE_OFFSET - (PAGE_SIZE * 8))
#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. */#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
struct thread_struct { unsigned long sp; /* kernel stack pointer */ unsigned long trap_no; /* saved status register */
/* FPU regs */ struct user_fp __aligned(16) user_fp;};
#define INIT_THREAD { \ .sp = sizeof(init_stack) + (unsigned long) &init_stack, \}
/* * 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 */#define start_thread(_regs, _pc, _usp) \do { \ (_regs)->pc = (_pc); \ (_regs)->regs[1] = 0; /* ABIV1 is R7, uClibc_main rtdl arg */ \ (_regs)->regs[2] = 0; \ (_regs)->regs[3] = 0; /* ABIV2 is R7, use it? */ \ (_regs)->sr &= ~PS_S; \ (_regs)->usp = (_usp); \} while (0)
/* Forward declaration, a strange C thing */struct task_struct;
/* Prepare to copy thread state - unlazy all lazy status */#define prepare_to_copy(tsk) do { } while (0)
unsigned long __get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)#define KSTK_ESP(tsk) (task_pt_regs(tsk)->usp)
#define task_pt_regs(p) \ ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
#define cpu_relax() barrier()
register unsigned long current_stack_pointer __asm__("sp");
#endif /* __ASM_CSKY_PROCESSOR_H */