Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1965aae3 PA |
2 | #ifndef _ASM_X86_SETUP_H |
3 | #define _ASM_X86_SETUP_H | |
ef685298 | 4 | |
af170c50 DH |
5 | #include <uapi/asm/setup.h> |
6 | ||
ef685298 TG |
7 | #define COMMAND_LINE_SIZE 2048 |
8 | ||
a1ed4ddf | 9 | #include <linux/linkage.h> |
35de5b06 | 10 | #include <asm/page_types.h> |
2b6ff7de | 11 | #include <asm/ibt.h> |
a1ed4ddf | 12 | |
ef685298 TG |
13 | #ifdef __i386__ |
14 | ||
15 | #include <linux/pfn.h> | |
16 | /* | |
17 | * Reserved space for vmalloc and iomap - defined in asm/page.h | |
18 | */ | |
19 | #define MAXMEM_PFN PFN_DOWN(MAXMEM) | |
20 | #define MAX_NONPAE_PFN (1 << 20) | |
21 | ||
fa76dab9 PA |
22 | #endif /* __i386__ */ |
23 | ||
24 | #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ | |
ef685298 | 25 | |
ef685298 | 26 | #define OLD_CL_MAGIC 0xA33F |
fa76dab9 | 27 | #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ |
ef685298 TG |
28 | #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ |
29 | ||
ef685298 TG |
30 | #ifndef __ASSEMBLY__ |
31 | #include <asm/bootparam.h> | |
845b3944 | 32 | #include <asm/x86_init.h> |
ef685298 | 33 | |
5aa3d718 BP |
34 | extern u64 relocated_ramdisk; |
35 | ||
15c55443 | 36 | /* Interrupt control for vSMPowered x86_64 systems */ |
70511134 | 37 | #ifdef CONFIG_X86_64 |
15c55443 | 38 | void vsmp_init(void); |
129d8bc8 YL |
39 | #else |
40 | static inline void vsmp_init(void) { } | |
41 | #endif | |
15c55443 | 42 | |
4b47cdbd JR |
43 | struct pt_regs; |
44 | ||
15c55443 | 45 | void setup_bios_corruption_check(void); |
630b3aff | 46 | void early_platform_quirks(void); |
15c55443 | 47 | |
15c55443 JSR |
48 | extern unsigned long saved_video_mode; |
49 | ||
8fee697d TG |
50 | extern void reserve_standard_io_resources(void); |
51 | extern void i386_reserve_resources(void); | |
ad3bc25a | 52 | extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp); |
866b556e | 53 | extern void startup_64_setup_env(unsigned long physbase); |
f5963ba7 | 54 | extern void early_setup_idt(void); |
4b47cdbd | 55 | extern void __init do_early_exception(struct pt_regs *regs, int trapnr); |
8fee697d | 56 | |
933b9463 | 57 | #ifdef CONFIG_X86_INTEL_MID |
712b6aa8 | 58 | extern void x86_intel_mid_early_setup(void); |
3f4110a4 | 59 | #else |
712b6aa8 | 60 | static inline void x86_intel_mid_early_setup(void) { } |
3f4110a4 TG |
61 | #endif |
62 | ||
c751e17b TG |
63 | #ifdef CONFIG_X86_INTEL_CE |
64 | extern void x86_ce4100_early_setup(void); | |
65 | #else | |
66 | static inline void x86_ce4100_early_setup(void) { } | |
67 | #endif | |
68 | ||
fa76dab9 PA |
69 | #ifndef _SETUP |
70 | ||
e1fe9ed8 | 71 | #include <asm/espfix.h> |
535b3ddc | 72 | #include <linux/kernel.h> |
e1fe9ed8 | 73 | |
ef685298 TG |
74 | /* |
75 | * This is set up by the setup-routine at boot-time | |
76 | */ | |
77 | extern struct boot_params boot_params; | |
4545c898 | 78 | extern char _text[]; |
ef685298 | 79 | |
78cac48c BP |
80 | static inline bool kaslr_enabled(void) |
81 | { | |
88107d33 MR |
82 | return IS_ENABLED(CONFIG_RANDOMIZE_MEMORY) && |
83 | !!(boot_params.hdr.loadflags & KASLR_FLAG); | |
84 | } | |
85 | ||
86 | /* | |
87 | * Apply no randomization if KASLR was disabled at boot or if KASAN | |
88 | * is enabled. KASAN shadow mappings rely on regions being PGD aligned. | |
89 | */ | |
90 | static inline bool kaslr_memory_enabled(void) | |
91 | { | |
92 | return kaslr_enabled() && !IS_ENABLED(CONFIG_KASAN); | |
78cac48c BP |
93 | } |
94 | ||
4545c898 JK |
95 | static inline unsigned long kaslr_offset(void) |
96 | { | |
97 | return (unsigned long)&_text - __START_KERNEL; | |
98 | } | |
99 | ||
ef685298 TG |
100 | /* |
101 | * Do NOT EVER look at the BIOS memory size location. | |
102 | * It does not work on many machines. | |
103 | */ | |
104 | #define LOWMEMSIZE() (0x9f000) | |
105 | ||
93dbda7c JF |
106 | /* exceedingly early brk-like allocator */ |
107 | extern unsigned long _brk_end; | |
108 | void *extend_brk(size_t size, size_t align); | |
109 | ||
796216a5 | 110 | /* |
e32683c6 JP |
111 | * Reserve space in the .brk section, which is a block of memory from which the |
112 | * caller is allowed to allocate very early (before even memblock is available) | |
113 | * by calling extend_brk(). All allocated memory will be eventually converted | |
114 | * to memblock. Any leftover unallocated memory will be freed. | |
796216a5 | 115 | * |
e32683c6 | 116 | * The size is in bytes. |
796216a5 | 117 | */ |
e32683c6 JP |
118 | #define RESERVE_BRK(name, size) \ |
119 | __section(".bss..brk") __aligned(1) __used \ | |
120 | static char __brk_##name[size] | |
796216a5 | 121 | |
5d94e81f | 122 | extern void probe_roms(void); |
96e8fc58 JG |
123 | |
124 | void clear_bss(void); | |
125 | ||
95a71a45 YL |
126 | #ifdef __i386__ |
127 | ||
a1ed4ddf | 128 | asmlinkage void __init i386_start_kernel(void); |
746ef0cd | 129 | |
102e3b8d | 130 | #else |
a1ed4ddf AK |
131 | asmlinkage void __init x86_64_start_kernel(char *real_mode); |
132 | asmlinkage void __init x86_64_start_reservations(char *real_mode_data); | |
f97013fd | 133 | |
ef685298 | 134 | #endif /* __i386__ */ |
fa76dab9 | 135 | #endif /* _SETUP */ |
e32683c6 JP |
136 | |
137 | #else /* __ASSEMBLY */ | |
138 | ||
139 | .macro __RESERVE_BRK name, size | |
140 | .pushsection .bss..brk, "aw" | |
141 | SYM_DATA_START(__brk_\name) | |
142 | .skip \size | |
143 | SYM_DATA_END(__brk_\name) | |
796216a5 | 144 | .popsection |
e32683c6 JP |
145 | .endm |
146 | ||
147 | #define RESERVE_BRK(name, size) __RESERVE_BRK name, size | |
148 | ||
ef685298 | 149 | #endif /* __ASSEMBLY__ */ |
e32683c6 | 150 | |
1965aae3 | 151 | #endif /* _ASM_X86_SETUP_H */ |