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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef _ASM_X86_SETUP_H
2#define _ASM_X86_SETUP_H
3
4#ifdef __KERNEL__
5
6#define COMMAND_LINE_SIZE 2048
7
8#ifdef __i386__
9
10#include <linux/pfn.h>
11/*
12 * Reserved space for vmalloc and iomap - defined in asm/page.h
13 */
14#define MAXMEM_PFN PFN_DOWN(MAXMEM)
15#define MAX_NONPAE_PFN (1 << 20)
16
17#endif /* __i386__ */
18
19#define PARAM_SIZE 4096 /* sizeof(struct boot_params) */
20
21#define OLD_CL_MAGIC 0xA33F
22#define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */
23#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
24
25#ifndef __ASSEMBLY__
26#include <asm/bootparam.h>
27#include <asm/x86_init.h>
28
29/* Interrupt control for vSMPowered x86_64 systems */
30#ifdef CONFIG_X86_64
31void vsmp_init(void);
32#else
33static inline void vsmp_init(void) { }
34#endif
35
36void setup_bios_corruption_check(void);
37
38#ifdef CONFIG_X86_VISWS
39extern void visws_early_detect(void);
40#else
41static inline void visws_early_detect(void) { }
42#endif
43
44extern unsigned long saved_video_mode;
45
46extern void reserve_standard_io_resources(void);
47extern void i386_reserve_resources(void);
48extern void setup_default_timer_irq(void);
49
50#ifdef CONFIG_X86_MRST
51extern void x86_mrst_early_setup(void);
52#else
53static inline void x86_mrst_early_setup(void) { }
54#endif
55
56#ifndef _SETUP
57
58/*
59 * This is set up by the setup-routine at boot-time
60 */
61extern struct boot_params boot_params;
62
63/*
64 * Do NOT EVER look at the BIOS memory size location.
65 * It does not work on many machines.
66 */
67#define LOWMEMSIZE() (0x9f000)
68
69/* exceedingly early brk-like allocator */
70extern unsigned long _brk_end;
71void *extend_brk(size_t size, size_t align);
72
73/*
74 * Reserve space in the brk section. The name must be unique within
75 * the file, and somewhat descriptive. The size is in bytes. Must be
76 * used at file scope.
77 *
78 * (This uses a temp function to wrap the asm so we can pass it the
79 * size parameter; otherwise we wouldn't be able to. We can't use a
80 * "section" attribute on a normal variable because it always ends up
81 * being @progbits, which ends up allocating space in the vmlinux
82 * executable.)
83 */
84#define RESERVE_BRK(name,sz) \
85 static void __section(.discard) __used \
86 __brk_reservation_fn_##name##__(void) { \
87 asm volatile ( \
88 ".pushsection .brk_reservation,\"aw\",@nobits;" \
89 ".brk." #name ":" \
90 " 1:.skip %c0;" \
91 " .size .brk." #name ", . - 1b;" \
92 " .popsection" \
93 : : "i" (sz)); \
94 }
95
96#ifdef __i386__
97
98void __init i386_start_kernel(void);
99extern void probe_roms(void);
100
101#else
102void __init x86_64_start_kernel(char *real_mode);
103void __init x86_64_start_reservations(char *real_mode_data);
104
105#endif /* __i386__ */
106#endif /* _SETUP */
107#else
108#define RESERVE_BRK(name,sz) \
109 .pushsection .brk_reservation,"aw",@nobits; \
110.brk.name: \
1111: .skip sz; \
112 .size .brk.name,.-1b; \
113 .popsection
114#endif /* __ASSEMBLY__ */
115#endif /* __KERNEL__ */
116
117#endif /* _ASM_X86_SETUP_H */