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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#include <linux/linkage.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
32/* Interrupt control for vSMPowered x86_64 systems */
33#ifdef CONFIG_X86_64
34void vsmp_init(void);
35#else
36static inline void vsmp_init(void) { }
37#endif
38
39void setup_bios_corruption_check(void);
40
41#ifdef CONFIG_X86_VISWS
42extern void visws_early_detect(void);
43#else
44static inline void visws_early_detect(void) { }
45#endif
46
47extern unsigned long saved_video_mode;
48
49extern void reserve_standard_io_resources(void);
50extern void i386_reserve_resources(void);
51extern void setup_default_timer_irq(void);
52
53#ifdef CONFIG_X86_INTEL_MID
54extern void x86_mrst_early_setup(void);
55#else
56static inline void x86_mrst_early_setup(void) { }
57#endif
58
59#ifdef CONFIG_X86_INTEL_CE
60extern void x86_ce4100_early_setup(void);
61#else
62static inline void x86_ce4100_early_setup(void) { }
63#endif
64
65#ifndef _SETUP
66
67/*
68 * This is set up by the setup-routine at boot-time
69 */
70extern struct boot_params boot_params;
71
72/*
73 * Do NOT EVER look at the BIOS memory size location.
74 * It does not work on many machines.
75 */
76#define LOWMEMSIZE() (0x9f000)
77
78/* exceedingly early brk-like allocator */
79extern unsigned long _brk_end;
80void *extend_brk(size_t size, size_t align);
81
82/*
83 * Reserve space in the brk section. The name must be unique within
84 * the file, and somewhat descriptive. The size is in bytes. Must be
85 * used at file scope.
86 *
87 * (This uses a temp function to wrap the asm so we can pass it the
88 * size parameter; otherwise we wouldn't be able to. We can't use a
89 * "section" attribute on a normal variable because it always ends up
90 * being @progbits, which ends up allocating space in the vmlinux
91 * executable.)
92 */
93#define RESERVE_BRK(name,sz) \
94 static void __section(.discard.text) __used notrace \
95 __brk_reservation_fn_##name##__(void) { \
96 asm volatile ( \
97 ".pushsection .brk_reservation,\"aw\",@nobits;" \
98 ".brk." #name ":" \
99 " 1:.skip %c0;" \
100 " .size .brk." #name ", . - 1b;" \
101 " .popsection" \
102 : : "i" (sz)); \
103 }
104
105/* Helper for reserving space for arrays of things */
106#define RESERVE_BRK_ARRAY(type, name, entries) \
107 type *name; \
108 RESERVE_BRK(name, sizeof(type) * entries)
109
110extern void probe_roms(void);
111#ifdef __i386__
112
113asmlinkage void __init i386_start_kernel(void);
114
115#else
116asmlinkage void __init x86_64_start_kernel(char *real_mode);
117asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
118
119#endif /* __i386__ */
120#endif /* _SETUP */
121#else
122#define RESERVE_BRK(name,sz) \
123 .pushsection .brk_reservation,"aw",@nobits; \
124.brk.name: \
1251: .skip sz; \
126 .size .brk.name,.-1b; \
127 .popsection
128#endif /* __ASSEMBLY__ */
129#endif /* _ASM_X86_SETUP_H */