Linux kernel mirror (for testing)
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1#ifndef _ASM_X86_SETUP_H
2#define _ASM_X86_SETUP_H
3
4#include <uapi/asm/setup.h>
5
6#define COMMAND_LINE_SIZE 2048
7
8#include <linux/linkage.h>
9#include <asm/page_types.h>
10
11#ifdef __i386__
12
13#include <linux/pfn.h>
14/*
15 * Reserved space for vmalloc and iomap - defined in asm/page.h
16 */
17#define MAXMEM_PFN PFN_DOWN(MAXMEM)
18#define MAX_NONPAE_PFN (1 << 20)
19
20#endif /* __i386__ */
21
22#define PARAM_SIZE 4096 /* sizeof(struct boot_params) */
23
24#define OLD_CL_MAGIC 0xA33F
25#define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */
26#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
27
28#ifndef __ASSEMBLY__
29#include <asm/bootparam.h>
30#include <asm/x86_init.h>
31
32extern u64 relocated_ramdisk;
33
34/* Interrupt control for vSMPowered x86_64 systems */
35#ifdef CONFIG_X86_64
36void vsmp_init(void);
37#else
38static inline void vsmp_init(void) { }
39#endif
40
41void setup_bios_corruption_check(void);
42
43extern unsigned long saved_video_mode;
44
45extern void reserve_standard_io_resources(void);
46extern void i386_reserve_resources(void);
47extern void setup_default_timer_irq(void);
48
49#ifdef CONFIG_X86_INTEL_MID
50extern void x86_intel_mid_early_setup(void);
51#else
52static inline void x86_intel_mid_early_setup(void) { }
53#endif
54
55#ifdef CONFIG_X86_INTEL_CE
56extern void x86_ce4100_early_setup(void);
57#else
58static inline void x86_ce4100_early_setup(void) { }
59#endif
60
61#ifndef _SETUP
62
63#include <asm/espfix.h>
64#include <linux/kernel.h>
65
66/*
67 * This is set up by the setup-routine at boot-time
68 */
69extern struct boot_params boot_params;
70extern char _text[];
71
72static inline bool kaslr_enabled(void)
73{
74 return !!(boot_params.hdr.loadflags & KASLR_FLAG);
75}
76
77static inline unsigned long kaslr_offset(void)
78{
79 return (unsigned long)&_text - __START_KERNEL;
80}
81
82/*
83 * Do NOT EVER look at the BIOS memory size location.
84 * It does not work on many machines.
85 */
86#define LOWMEMSIZE() (0x9f000)
87
88/* exceedingly early brk-like allocator */
89extern unsigned long _brk_end;
90void *extend_brk(size_t size, size_t align);
91
92/*
93 * Reserve space in the brk section. The name must be unique within
94 * the file, and somewhat descriptive. The size is in bytes. Must be
95 * used at file scope.
96 *
97 * (This uses a temp function to wrap the asm so we can pass it the
98 * size parameter; otherwise we wouldn't be able to. We can't use a
99 * "section" attribute on a normal variable because it always ends up
100 * being @progbits, which ends up allocating space in the vmlinux
101 * executable.)
102 */
103#define RESERVE_BRK(name,sz) \
104 static void __section(.discard.text) __used notrace \
105 __brk_reservation_fn_##name##__(void) { \
106 asm volatile ( \
107 ".pushsection .brk_reservation,\"aw\",@nobits;" \
108 ".brk." #name ":" \
109 " 1:.skip %c0;" \
110 " .size .brk." #name ", . - 1b;" \
111 " .popsection" \
112 : : "i" (sz)); \
113 }
114
115/* Helper for reserving space for arrays of things */
116#define RESERVE_BRK_ARRAY(type, name, entries) \
117 type *name; \
118 RESERVE_BRK(name, sizeof(type) * entries)
119
120extern void probe_roms(void);
121#ifdef __i386__
122
123asmlinkage void __init i386_start_kernel(void);
124
125#else
126asmlinkage void __init x86_64_start_kernel(char *real_mode);
127asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
128
129#endif /* __i386__ */
130#endif /* _SETUP */
131#else
132#define RESERVE_BRK(name,sz) \
133 .pushsection .brk_reservation,"aw",@nobits; \
134.brk.name: \
1351: .skip sz; \
136 .size .brk.name,.-1b; \
137 .popsection
138#endif /* __ASSEMBLY__ */
139#endif /* _ASM_X86_SETUP_H */