tjh.dev
Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 1999, 2017
5 */
6#ifndef _ASM_S390_SETUP_H
7#define _ASM_S390_SETUP_H
8
9#include <linux/bits.h>
10#include <uapi/asm/setup.h>
11#include <linux/build_bug.h>
12
13#define EP_OFFSET 0x10008
14#define EP_STRING "S390EP"
15#define PARMAREA 0x10400
16#define EARLY_SCCB_OFFSET 0x11000
17#define HEAD_END 0x12000
18
19/*
20 * Machine features detected in early.c
21 */
22
23#define MACHINE_FLAG_VM BIT(0)
24#define MACHINE_FLAG_KVM BIT(1)
25#define MACHINE_FLAG_LPAR BIT(2)
26#define MACHINE_FLAG_DIAG9C BIT(3)
27#define MACHINE_FLAG_ESOP BIT(4)
28#define MACHINE_FLAG_IDTE BIT(5)
29#define MACHINE_FLAG_EDAT1 BIT(7)
30#define MACHINE_FLAG_EDAT2 BIT(8)
31#define MACHINE_FLAG_TOPOLOGY BIT(10)
32#define MACHINE_FLAG_TE BIT(11)
33#define MACHINE_FLAG_TLB_LC BIT(12)
34#define MACHINE_FLAG_VX BIT(13)
35#define MACHINE_FLAG_TLB_GUEST BIT(14)
36#define MACHINE_FLAG_NX BIT(15)
37#define MACHINE_FLAG_GS BIT(16)
38#define MACHINE_FLAG_SCC BIT(17)
39
40#define LPP_MAGIC BIT(31)
41#define LPP_PID_MASK _AC(0xffffffff, UL)
42
43/* Offsets to entry points in kernel/head.S */
44
45#define STARTUP_NORMAL_OFFSET 0x10000
46#define STARTUP_KDUMP_OFFSET 0x10010
47
48/* Offsets to parameters in kernel/head.S */
49
50#define IPL_DEVICE_OFFSET 0x10400
51#define INITRD_START_OFFSET 0x10408
52#define INITRD_SIZE_OFFSET 0x10410
53#define OLDMEM_BASE_OFFSET 0x10418
54#define OLDMEM_SIZE_OFFSET 0x10420
55#define KERNEL_VERSION_OFFSET 0x10428
56#define COMMAND_LINE_OFFSET 0x10480
57
58#ifndef __ASSEMBLY__
59
60#include <asm/lowcore.h>
61#include <asm/types.h>
62
63#define IPL_DEVICE (*(unsigned long *) (IPL_DEVICE_OFFSET))
64#define INITRD_START (*(unsigned long *) (INITRD_START_OFFSET))
65#define INITRD_SIZE (*(unsigned long *) (INITRD_SIZE_OFFSET))
66#define OLDMEM_BASE (*(unsigned long *) (OLDMEM_BASE_OFFSET))
67#define OLDMEM_SIZE (*(unsigned long *) (OLDMEM_SIZE_OFFSET))
68#define COMMAND_LINE ((char *) (COMMAND_LINE_OFFSET))
69
70struct parmarea {
71 unsigned long ipl_device; /* 0x10400 */
72 unsigned long initrd_start; /* 0x10408 */
73 unsigned long initrd_size; /* 0x10410 */
74 unsigned long oldmem_base; /* 0x10418 */
75 unsigned long oldmem_size; /* 0x10420 */
76 unsigned long kernel_version; /* 0x10428 */
77 char pad1[0x10480 - 0x10430]; /* 0x10430 - 0x10480 */
78 char command_line[ARCH_COMMAND_LINE_SIZE]; /* 0x10480 */
79};
80
81extern struct parmarea parmarea;
82
83extern unsigned int zlib_dfltcc_support;
84#define ZLIB_DFLTCC_DISABLED 0
85#define ZLIB_DFLTCC_FULL 1
86#define ZLIB_DFLTCC_DEFLATE_ONLY 2
87#define ZLIB_DFLTCC_INFLATE_ONLY 3
88#define ZLIB_DFLTCC_FULL_DEBUG 4
89
90extern int noexec_disabled;
91extern unsigned long ident_map_size;
92
93/* The Write Back bit position in the physaddr is given by the SLPC PCI */
94extern unsigned long mio_wb_bit_mask;
95
96#define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM)
97#define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
98#define MACHINE_IS_LPAR (S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
99
100#define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
101#define MACHINE_HAS_ESOP (S390_lowcore.machine_flags & MACHINE_FLAG_ESOP)
102#define MACHINE_HAS_IDTE (S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
103#define MACHINE_HAS_EDAT1 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
104#define MACHINE_HAS_EDAT2 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
105#define MACHINE_HAS_TOPOLOGY (S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
106#define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE)
107#define MACHINE_HAS_TLB_LC (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
108#define MACHINE_HAS_VX (S390_lowcore.machine_flags & MACHINE_FLAG_VX)
109#define MACHINE_HAS_TLB_GUEST (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
110#define MACHINE_HAS_NX (S390_lowcore.machine_flags & MACHINE_FLAG_NX)
111#define MACHINE_HAS_GS (S390_lowcore.machine_flags & MACHINE_FLAG_GS)
112#define MACHINE_HAS_SCC (S390_lowcore.machine_flags & MACHINE_FLAG_SCC)
113
114/*
115 * Console mode. Override with conmode=
116 */
117extern unsigned int console_mode;
118extern unsigned int console_devno;
119extern unsigned int console_irq;
120
121#define CONSOLE_IS_UNDEFINED (console_mode == 0)
122#define CONSOLE_IS_SCLP (console_mode == 1)
123#define CONSOLE_IS_3215 (console_mode == 2)
124#define CONSOLE_IS_3270 (console_mode == 3)
125#define CONSOLE_IS_VT220 (console_mode == 4)
126#define CONSOLE_IS_HVC (console_mode == 5)
127#define SET_CONSOLE_SCLP do { console_mode = 1; } while (0)
128#define SET_CONSOLE_3215 do { console_mode = 2; } while (0)
129#define SET_CONSOLE_3270 do { console_mode = 3; } while (0)
130#define SET_CONSOLE_VT220 do { console_mode = 4; } while (0)
131#define SET_CONSOLE_HVC do { console_mode = 5; } while (0)
132
133#ifdef CONFIG_PFAULT
134extern int pfault_init(void);
135extern void pfault_fini(void);
136#else /* CONFIG_PFAULT */
137#define pfault_init() ({-1;})
138#define pfault_fini() do { } while (0)
139#endif /* CONFIG_PFAULT */
140
141#ifdef CONFIG_VMCP
142void vmcp_cma_reserve(void);
143#else
144static inline void vmcp_cma_reserve(void) { }
145#endif
146
147void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
148
149void cmma_init(void);
150void cmma_init_nodat(void);
151
152extern void (*_machine_restart)(char *command);
153extern void (*_machine_halt)(void);
154extern void (*_machine_power_off)(void);
155
156extern unsigned long __kaslr_offset;
157static inline unsigned long kaslr_offset(void)
158{
159 return __kaslr_offset;
160}
161
162extern int is_full_image;
163
164static inline u32 gen_lpswe(unsigned long addr)
165{
166 BUILD_BUG_ON(addr > 0xfff);
167 return 0xb2b20000 | addr;
168}
169
170#else /* __ASSEMBLY__ */
171
172#define IPL_DEVICE (IPL_DEVICE_OFFSET)
173#define INITRD_START (INITRD_START_OFFSET)
174#define INITRD_SIZE (INITRD_SIZE_OFFSET)
175#define OLDMEM_BASE (OLDMEM_BASE_OFFSET)
176#define OLDMEM_SIZE (OLDMEM_SIZE_OFFSET)
177#define COMMAND_LINE (COMMAND_LINE_OFFSET)
178
179#endif /* __ASSEMBLY__ */
180#endif /* _ASM_S390_SETUP_H */