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 PARMAREA 0x10400
14
15#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
16/*
17 * Machine features detected in early.c
18 */
19
20#define MACHINE_FLAG_VM BIT(0)
21#define MACHINE_FLAG_KVM BIT(1)
22#define MACHINE_FLAG_LPAR BIT(2)
23#define MACHINE_FLAG_DIAG9C BIT(3)
24#define MACHINE_FLAG_ESOP BIT(4)
25#define MACHINE_FLAG_IDTE BIT(5)
26#define MACHINE_FLAG_EDAT1 BIT(7)
27#define MACHINE_FLAG_EDAT2 BIT(8)
28#define MACHINE_FLAG_TOPOLOGY BIT(10)
29#define MACHINE_FLAG_TE BIT(11)
30#define MACHINE_FLAG_TLB_LC BIT(12)
31#define MACHINE_FLAG_VX BIT(13)
32#define MACHINE_FLAG_TLB_GUEST BIT(14)
33#define MACHINE_FLAG_NX BIT(15)
34#define MACHINE_FLAG_GS BIT(16)
35#define MACHINE_FLAG_SCC BIT(17)
36#define MACHINE_FLAG_PCI_MIO BIT(18)
37#define MACHINE_FLAG_RDP BIT(19)
38
39#define LPP_MAGIC BIT(31)
40#define LPP_PID_MASK _AC(0xffffffff, UL)
41
42/* Offsets to entry points in kernel/head.S */
43
44#define STARTUP_NORMAL_OFFSET 0x10000
45#define STARTUP_KDUMP_OFFSET 0x10010
46
47#define LEGACY_COMMAND_LINE_SIZE 896
48
49#ifndef __ASSEMBLY__
50
51#include <asm/lowcore.h>
52#include <asm/types.h>
53
54struct parmarea {
55 unsigned long ipl_device; /* 0x10400 */
56 unsigned long initrd_start; /* 0x10408 */
57 unsigned long initrd_size; /* 0x10410 */
58 unsigned long oldmem_base; /* 0x10418 */
59 unsigned long oldmem_size; /* 0x10420 */
60 unsigned long kernel_version; /* 0x10428 */
61 unsigned long max_command_line_size; /* 0x10430 */
62 char pad1[0x10480-0x10438]; /* 0x10438 - 0x10480 */
63 char command_line[COMMAND_LINE_SIZE]; /* 0x10480 */
64};
65
66extern struct parmarea parmarea;
67
68extern unsigned int zlib_dfltcc_support;
69#define ZLIB_DFLTCC_DISABLED 0
70#define ZLIB_DFLTCC_FULL 1
71#define ZLIB_DFLTCC_DEFLATE_ONLY 2
72#define ZLIB_DFLTCC_INFLATE_ONLY 3
73#define ZLIB_DFLTCC_FULL_DEBUG 4
74
75extern int noexec_disabled;
76extern unsigned long ident_map_size;
77
78/* The Write Back bit position in the physaddr is given by the SLPC PCI */
79extern unsigned long mio_wb_bit_mask;
80
81#define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM)
82#define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
83#define MACHINE_IS_LPAR (S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
84
85#define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
86#define MACHINE_HAS_ESOP (S390_lowcore.machine_flags & MACHINE_FLAG_ESOP)
87#define MACHINE_HAS_IDTE (S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
88#define MACHINE_HAS_EDAT1 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
89#define MACHINE_HAS_EDAT2 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
90#define MACHINE_HAS_TOPOLOGY (S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
91#define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE)
92#define MACHINE_HAS_TLB_LC (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
93#define MACHINE_HAS_VX (S390_lowcore.machine_flags & MACHINE_FLAG_VX)
94#define MACHINE_HAS_TLB_GUEST (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
95#define MACHINE_HAS_NX (S390_lowcore.machine_flags & MACHINE_FLAG_NX)
96#define MACHINE_HAS_GS (S390_lowcore.machine_flags & MACHINE_FLAG_GS)
97#define MACHINE_HAS_SCC (S390_lowcore.machine_flags & MACHINE_FLAG_SCC)
98#define MACHINE_HAS_PCI_MIO (S390_lowcore.machine_flags & MACHINE_FLAG_PCI_MIO)
99#define MACHINE_HAS_RDP (S390_lowcore.machine_flags & MACHINE_FLAG_RDP)
100
101/*
102 * Console mode. Override with conmode=
103 */
104extern unsigned int console_mode;
105extern unsigned int console_devno;
106extern unsigned int console_irq;
107
108#define CONSOLE_IS_UNDEFINED (console_mode == 0)
109#define CONSOLE_IS_SCLP (console_mode == 1)
110#define CONSOLE_IS_3215 (console_mode == 2)
111#define CONSOLE_IS_3270 (console_mode == 3)
112#define CONSOLE_IS_VT220 (console_mode == 4)
113#define CONSOLE_IS_HVC (console_mode == 5)
114#define SET_CONSOLE_SCLP do { console_mode = 1; } while (0)
115#define SET_CONSOLE_3215 do { console_mode = 2; } while (0)
116#define SET_CONSOLE_3270 do { console_mode = 3; } while (0)
117#define SET_CONSOLE_VT220 do { console_mode = 4; } while (0)
118#define SET_CONSOLE_HVC do { console_mode = 5; } while (0)
119
120#ifdef CONFIG_PFAULT
121extern int pfault_init(void);
122extern void pfault_fini(void);
123#else /* CONFIG_PFAULT */
124#define pfault_init() ({-1;})
125#define pfault_fini() do { } while (0)
126#endif /* CONFIG_PFAULT */
127
128#ifdef CONFIG_VMCP
129void vmcp_cma_reserve(void);
130#else
131static inline void vmcp_cma_reserve(void) { }
132#endif
133
134void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
135
136void cmma_init(void);
137void cmma_init_nodat(void);
138
139extern void (*_machine_restart)(char *command);
140extern void (*_machine_halt)(void);
141extern void (*_machine_power_off)(void);
142
143extern unsigned long __kaslr_offset;
144static inline unsigned long kaslr_offset(void)
145{
146 return __kaslr_offset;
147}
148
149extern int __kaslr_enabled;
150static inline int kaslr_enabled(void)
151{
152 if (IS_ENABLED(CONFIG_RANDOMIZE_BASE))
153 return __kaslr_enabled;
154 return 0;
155}
156
157struct oldmem_data {
158 unsigned long start;
159 unsigned long size;
160};
161extern struct oldmem_data oldmem_data;
162
163static __always_inline u32 gen_lpswe(unsigned long addr)
164{
165 BUILD_BUG_ON(addr > 0xfff);
166 return 0xb2b20000 | addr;
167}
168#endif /* __ASSEMBLY__ */
169#endif /* _ASM_S390_SETUP_H */