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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> |
a1ed4ddf | 11 | |
ef685298 TG |
12 | #ifdef __i386__ |
13 | ||
14 | #include <linux/pfn.h> | |
15 | /* | |
16 | * Reserved space for vmalloc and iomap - defined in asm/page.h | |
17 | */ | |
18 | #define MAXMEM_PFN PFN_DOWN(MAXMEM) | |
19 | #define MAX_NONPAE_PFN (1 << 20) | |
20 | ||
fa76dab9 PA |
21 | #endif /* __i386__ */ |
22 | ||
23 | #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ | |
ef685298 | 24 | |
ef685298 | 25 | #define OLD_CL_MAGIC 0xA33F |
fa76dab9 | 26 | #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ |
ef685298 TG |
27 | #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ |
28 | ||
ef685298 TG |
29 | #ifndef __ASSEMBLY__ |
30 | #include <asm/bootparam.h> | |
845b3944 | 31 | #include <asm/x86_init.h> |
ef685298 | 32 | |
5aa3d718 BP |
33 | extern u64 relocated_ramdisk; |
34 | ||
15c55443 | 35 | /* Interrupt control for vSMPowered x86_64 systems */ |
70511134 | 36 | #ifdef CONFIG_X86_64 |
15c55443 | 37 | void vsmp_init(void); |
129d8bc8 YL |
38 | #else |
39 | static inline void vsmp_init(void) { } | |
40 | #endif | |
15c55443 JSR |
41 | |
42 | void setup_bios_corruption_check(void); | |
630b3aff | 43 | void early_platform_quirks(void); |
15c55443 | 44 | |
15c55443 JSR |
45 | extern unsigned long saved_video_mode; |
46 | ||
8fee697d TG |
47 | extern void reserve_standard_io_resources(void); |
48 | extern void i386_reserve_resources(void); | |
49 | ||
933b9463 | 50 | #ifdef CONFIG_X86_INTEL_MID |
712b6aa8 | 51 | extern void x86_intel_mid_early_setup(void); |
3f4110a4 | 52 | #else |
712b6aa8 | 53 | static inline void x86_intel_mid_early_setup(void) { } |
3f4110a4 TG |
54 | #endif |
55 | ||
c751e17b TG |
56 | #ifdef CONFIG_X86_INTEL_CE |
57 | extern void x86_ce4100_early_setup(void); | |
58 | #else | |
59 | static inline void x86_ce4100_early_setup(void) { } | |
60 | #endif | |
61 | ||
fa76dab9 PA |
62 | #ifndef _SETUP |
63 | ||
e1fe9ed8 | 64 | #include <asm/espfix.h> |
535b3ddc | 65 | #include <linux/kernel.h> |
e1fe9ed8 | 66 | |
ef685298 TG |
67 | /* |
68 | * This is set up by the setup-routine at boot-time | |
69 | */ | |
70 | extern struct boot_params boot_params; | |
4545c898 | 71 | extern char _text[]; |
ef685298 | 72 | |
78cac48c BP |
73 | static inline bool kaslr_enabled(void) |
74 | { | |
75 | return !!(boot_params.hdr.loadflags & KASLR_FLAG); | |
76 | } | |
77 | ||
4545c898 JK |
78 | static inline unsigned long kaslr_offset(void) |
79 | { | |
80 | return (unsigned long)&_text - __START_KERNEL; | |
81 | } | |
82 | ||
ef685298 TG |
83 | /* |
84 | * Do NOT EVER look at the BIOS memory size location. | |
85 | * It does not work on many machines. | |
86 | */ | |
87 | #define LOWMEMSIZE() (0x9f000) | |
88 | ||
93dbda7c JF |
89 | /* exceedingly early brk-like allocator */ |
90 | extern unsigned long _brk_end; | |
91 | void *extend_brk(size_t size, size_t align); | |
92 | ||
796216a5 JF |
93 | /* |
94 | * Reserve space in the brk section. The name must be unique within | |
95 | * the file, and somewhat descriptive. The size is in bytes. Must be | |
96 | * used at file scope. | |
97 | * | |
98 | * (This uses a temp function to wrap the asm so we can pass it the | |
99 | * size parameter; otherwise we wouldn't be able to. We can't use a | |
100 | * "section" attribute on a normal variable because it always ends up | |
101 | * being @progbits, which ends up allocating space in the vmlinux | |
102 | * executable.) | |
103 | */ | |
104 | #define RESERVE_BRK(name,sz) \ | |
2895cd2a | 105 | static void __section(.discard.text) __used notrace \ |
796216a5 JF |
106 | __brk_reservation_fn_##name##__(void) { \ |
107 | asm volatile ( \ | |
108 | ".pushsection .brk_reservation,\"aw\",@nobits;" \ | |
0b1c723d | 109 | ".brk." #name ":" \ |
796216a5 | 110 | " 1:.skip %c0;" \ |
0b1c723d | 111 | " .size .brk." #name ", . - 1b;" \ |
796216a5 JF |
112 | " .popsection" \ |
113 | : : "i" (sz)); \ | |
114 | } | |
115 | ||
161b0275 JF |
116 | /* Helper for reserving space for arrays of things */ |
117 | #define RESERVE_BRK_ARRAY(type, name, entries) \ | |
118 | type *name; \ | |
119 | RESERVE_BRK(name, sizeof(type) * entries) | |
120 | ||
5d94e81f | 121 | extern void probe_roms(void); |
95a71a45 YL |
122 | #ifdef __i386__ |
123 | ||
a1ed4ddf | 124 | asmlinkage void __init i386_start_kernel(void); |
746ef0cd | 125 | |
102e3b8d | 126 | #else |
a1ed4ddf AK |
127 | asmlinkage void __init x86_64_start_kernel(char *real_mode); |
128 | asmlinkage void __init x86_64_start_reservations(char *real_mode_data); | |
f97013fd | 129 | |
ef685298 | 130 | #endif /* __i386__ */ |
fa76dab9 | 131 | #endif /* _SETUP */ |
796216a5 JF |
132 | #else |
133 | #define RESERVE_BRK(name,sz) \ | |
134 | .pushsection .brk_reservation,"aw",@nobits; \ | |
0b1c723d | 135 | .brk.name: \ |
796216a5 | 136 | 1: .skip sz; \ |
0b1c723d | 137 | .size .brk.name,.-1b; \ |
796216a5 | 138 | .popsection |
ef685298 | 139 | #endif /* __ASSEMBLY__ */ |
1965aae3 | 140 | #endif /* _ASM_X86_SETUP_H */ |