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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
7#define COMMAND_LINE_SIZE 2048
8
9#ifdef __i386__
10
11#include <linux/pfn.h>
12/*
13 * Reserved space for vmalloc and iomap - defined in asm/page.h
14 */
15#define MAXMEM_PFN PFN_DOWN(MAXMEM)
16#define MAX_NONPAE_PFN (1 << 20)
17
18#endif /* __i386__ */
19
20#define PARAM_SIZE 4096 /* sizeof(struct boot_params) */
21
22#define OLD_CL_MAGIC 0xA33F
23#define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */
24#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
25
26#ifndef __ASSEMBLY__
27#include <asm/bootparam.h>
28#include <asm/x86_init.h>
29
30/* Interrupt control for vSMPowered x86_64 systems */
31#ifdef CONFIG_X86_64
32void vsmp_init(void);
33#else
34static inline void vsmp_init(void) { }
35#endif
36
37void setup_bios_corruption_check(void);
38
39#ifdef CONFIG_X86_VISWS
40extern void visws_early_detect(void);
41#else
42static inline void visws_early_detect(void) { }
43#endif
44
45extern unsigned long saved_video_mode;
46
47extern void reserve_standard_io_resources(void);
48extern void i386_reserve_resources(void);
49extern void setup_default_timer_irq(void);
50
51#ifdef CONFIG_X86_INTEL_MID
52extern void x86_mrst_early_setup(void);
53#else
54static inline void x86_mrst_early_setup(void) { }
55#endif
56
57#ifdef CONFIG_X86_INTEL_CE
58extern void x86_ce4100_early_setup(void);
59#else
60static inline void x86_ce4100_early_setup(void) { }
61#endif
62
63#ifndef _SETUP
64
65/*
66 * This is set up by the setup-routine at boot-time
67 */
68extern struct boot_params boot_params;
69
70/*
71 * Do NOT EVER look at the BIOS memory size location.
72 * It does not work on many machines.
73 */
74#define LOWMEMSIZE() (0x9f000)
75
76/* exceedingly early brk-like allocator */
77extern unsigned long _brk_end;
78void *extend_brk(size_t size, size_t align);
79
80/*
81 * Reserve space in the brk section. The name must be unique within
82 * the file, and somewhat descriptive. The size is in bytes. Must be
83 * used at file scope.
84 *
85 * (This uses a temp function to wrap the asm so we can pass it the
86 * size parameter; otherwise we wouldn't be able to. We can't use a
87 * "section" attribute on a normal variable because it always ends up
88 * being @progbits, which ends up allocating space in the vmlinux
89 * executable.)
90 */
91#define RESERVE_BRK(name,sz) \
92 static void __section(.discard.text) __used notrace \
93 __brk_reservation_fn_##name##__(void) { \
94 asm volatile ( \
95 ".pushsection .brk_reservation,\"aw\",@nobits;" \
96 ".brk." #name ":" \
97 " 1:.skip %c0;" \
98 " .size .brk." #name ", . - 1b;" \
99 " .popsection" \
100 : : "i" (sz)); \
101 }
102
103/* Helper for reserving space for arrays of things */
104#define RESERVE_BRK_ARRAY(type, name, entries) \
105 type *name; \
106 RESERVE_BRK(name, sizeof(type) * entries)
107
108extern void probe_roms(void);
109#ifdef __i386__
110
111void __init i386_start_kernel(void);
112
113#else
114void __init x86_64_start_kernel(char *real_mode);
115void __init x86_64_start_reservations(char *real_mode_data);
116
117#endif /* __i386__ */
118#endif /* _SETUP */
119#else
120#define RESERVE_BRK(name,sz) \
121 .pushsection .brk_reservation,"aw",@nobits; \
122.brk.name: \
1231: .skip sz; \
124 .size .brk.name,.-1b; \
125 .popsection
126#endif /* __ASSEMBLY__ */
127#endif /* _ASM_X86_SETUP_H */