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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 | |
3da3c68e KM |
12 | #define LOCKDOWN_LIFT_KEY 'x' |
13 | ||
ef685298 TG |
14 | #ifdef __i386__ |
15 | ||
16 | #include <linux/pfn.h> | |
17 | /* | |
18 | * Reserved space for vmalloc and iomap - defined in asm/page.h | |
19 | */ | |
20 | #define MAXMEM_PFN PFN_DOWN(MAXMEM) | |
21 | #define MAX_NONPAE_PFN (1 << 20) | |
22 | ||
fa76dab9 PA |
23 | #endif /* __i386__ */ |
24 | ||
25 | #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ | |
ef685298 | 26 | |
ef685298 | 27 | #define OLD_CL_MAGIC 0xA33F |
fa76dab9 | 28 | #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ |
ef685298 TG |
29 | #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ |
30 | ||
ef685298 TG |
31 | #ifndef __ASSEMBLY__ |
32 | #include <asm/bootparam.h> | |
845b3944 | 33 | #include <asm/x86_init.h> |
ef685298 | 34 | |
5aa3d718 BP |
35 | extern u64 relocated_ramdisk; |
36 | ||
15c55443 | 37 | /* Interrupt control for vSMPowered x86_64 systems */ |
70511134 | 38 | #ifdef CONFIG_X86_64 |
15c55443 | 39 | void vsmp_init(void); |
129d8bc8 YL |
40 | #else |
41 | static inline void vsmp_init(void) { } | |
42 | #endif | |
15c55443 JSR |
43 | |
44 | void setup_bios_corruption_check(void); | |
630b3aff | 45 | void early_platform_quirks(void); |
15c55443 | 46 | |
15c55443 JSR |
47 | extern unsigned long saved_video_mode; |
48 | ||
8fee697d TG |
49 | extern void reserve_standard_io_resources(void); |
50 | extern void i386_reserve_resources(void); | |
ad3bc25a BP |
51 | extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp); |
52 | extern unsigned long __startup_secondary_64(void); | |
53 | extern int early_make_pgtable(unsigned long address); | |
8fee697d | 54 | |
933b9463 | 55 | #ifdef CONFIG_X86_INTEL_MID |
712b6aa8 | 56 | extern void x86_intel_mid_early_setup(void); |
3f4110a4 | 57 | #else |
712b6aa8 | 58 | static inline void x86_intel_mid_early_setup(void) { } |
3f4110a4 TG |
59 | #endif |
60 | ||
c751e17b TG |
61 | #ifdef CONFIG_X86_INTEL_CE |
62 | extern void x86_ce4100_early_setup(void); | |
63 | #else | |
64 | static inline void x86_ce4100_early_setup(void) { } | |
65 | #endif | |
66 | ||
fa76dab9 PA |
67 | #ifndef _SETUP |
68 | ||
e1fe9ed8 | 69 | #include <asm/espfix.h> |
535b3ddc | 70 | #include <linux/kernel.h> |
e1fe9ed8 | 71 | |
ef685298 TG |
72 | /* |
73 | * This is set up by the setup-routine at boot-time | |
74 | */ | |
75 | extern struct boot_params boot_params; | |
4545c898 | 76 | extern char _text[]; |
ef685298 | 77 | |
78cac48c BP |
78 | static inline bool kaslr_enabled(void) |
79 | { | |
80 | return !!(boot_params.hdr.loadflags & KASLR_FLAG); | |
81 | } | |
82 | ||
4545c898 JK |
83 | static inline unsigned long kaslr_offset(void) |
84 | { | |
85 | return (unsigned long)&_text - __START_KERNEL; | |
86 | } | |
87 | ||
ef685298 TG |
88 | /* |
89 | * Do NOT EVER look at the BIOS memory size location. | |
90 | * It does not work on many machines. | |
91 | */ | |
92 | #define LOWMEMSIZE() (0x9f000) | |
93 | ||
93dbda7c JF |
94 | /* exceedingly early brk-like allocator */ |
95 | extern unsigned long _brk_end; | |
96 | void *extend_brk(size_t size, size_t align); | |
97 | ||
796216a5 JF |
98 | /* |
99 | * Reserve space in the brk section. The name must be unique within | |
100 | * the file, and somewhat descriptive. The size is in bytes. Must be | |
101 | * used at file scope. | |
102 | * | |
103 | * (This uses a temp function to wrap the asm so we can pass it the | |
104 | * size parameter; otherwise we wouldn't be able to. We can't use a | |
105 | * "section" attribute on a normal variable because it always ends up | |
106 | * being @progbits, which ends up allocating space in the vmlinux | |
107 | * executable.) | |
108 | */ | |
109 | #define RESERVE_BRK(name,sz) \ | |
2895cd2a | 110 | static void __section(.discard.text) __used notrace \ |
796216a5 JF |
111 | __brk_reservation_fn_##name##__(void) { \ |
112 | asm volatile ( \ | |
113 | ".pushsection .brk_reservation,\"aw\",@nobits;" \ | |
0b1c723d | 114 | ".brk." #name ":" \ |
796216a5 | 115 | " 1:.skip %c0;" \ |
0b1c723d | 116 | " .size .brk." #name ", . - 1b;" \ |
796216a5 JF |
117 | " .popsection" \ |
118 | : : "i" (sz)); \ | |
119 | } | |
120 | ||
161b0275 JF |
121 | /* Helper for reserving space for arrays of things */ |
122 | #define RESERVE_BRK_ARRAY(type, name, entries) \ | |
123 | type *name; \ | |
124 | RESERVE_BRK(name, sizeof(type) * entries) | |
125 | ||
5d94e81f | 126 | extern void probe_roms(void); |
95a71a45 YL |
127 | #ifdef __i386__ |
128 | ||
a1ed4ddf | 129 | asmlinkage void __init i386_start_kernel(void); |
746ef0cd | 130 | |
102e3b8d | 131 | #else |
a1ed4ddf AK |
132 | asmlinkage void __init x86_64_start_kernel(char *real_mode); |
133 | asmlinkage void __init x86_64_start_reservations(char *real_mode_data); | |
f97013fd | 134 | |
ef685298 | 135 | #endif /* __i386__ */ |
fa76dab9 | 136 | #endif /* _SETUP */ |
796216a5 JF |
137 | #else |
138 | #define RESERVE_BRK(name,sz) \ | |
139 | .pushsection .brk_reservation,"aw",@nobits; \ | |
0b1c723d | 140 | .brk.name: \ |
796216a5 | 141 | 1: .skip sz; \ |
0b1c723d | 142 | .size .brk.name,.-1b; \ |
796216a5 | 143 | .popsection |
ef685298 | 144 | #endif /* __ASSEMBLY__ */ |
1965aae3 | 145 | #endif /* _ASM_X86_SETUP_H */ |