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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
10#ifdef __i386__
11
12#include <linux/pfn.h>
13/*
14 * Reserved space for vmalloc and iomap - defined in asm/page.h
15 */
16#define MAXMEM_PFN PFN_DOWN(MAXMEM)
17#define MAX_NONPAE_PFN (1 << 20)
18
19#endif /* __i386__ */
20
21#define PARAM_SIZE 4096 /* sizeof(struct boot_params) */
22
23#define OLD_CL_MAGIC 0xA33F
24#define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */
25#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
26
27#ifndef __ASSEMBLY__
28#include <asm/bootparam.h>
29#include <asm/x86_init.h>
30
31extern u64 relocated_ramdisk;
32
33/* Interrupt control for vSMPowered x86_64 systems */
34#ifdef CONFIG_X86_64
35void vsmp_init(void);
36#else
37static inline void vsmp_init(void) { }
38#endif
39
40void setup_bios_corruption_check(void);
41
42#ifdef CONFIG_X86_VISWS
43extern void visws_early_detect(void);
44#else
45static inline void visws_early_detect(void) { }
46#endif
47
48extern unsigned long saved_video_mode;
49
50extern void reserve_standard_io_resources(void);
51extern void i386_reserve_resources(void);
52extern void setup_default_timer_irq(void);
53
54#ifdef CONFIG_X86_INTEL_MID
55extern void x86_intel_mid_early_setup(void);
56#else
57static inline void x86_intel_mid_early_setup(void) { }
58#endif
59
60#ifdef CONFIG_X86_INTEL_CE
61extern void x86_ce4100_early_setup(void);
62#else
63static inline void x86_ce4100_early_setup(void) { }
64#endif
65
66#ifndef _SETUP
67
68/*
69 * This is set up by the setup-routine at boot-time
70 */
71extern struct boot_params boot_params;
72
73/*
74 * Do NOT EVER look at the BIOS memory size location.
75 * It does not work on many machines.
76 */
77#define LOWMEMSIZE() (0x9f000)
78
79/* exceedingly early brk-like allocator */
80extern unsigned long _brk_end;
81void *extend_brk(size_t size, size_t align);
82
83/*
84 * Reserve space in the brk section. The name must be unique within
85 * the file, and somewhat descriptive. The size is in bytes. Must be
86 * used at file scope.
87 *
88 * (This uses a temp function to wrap the asm so we can pass it the
89 * size parameter; otherwise we wouldn't be able to. We can't use a
90 * "section" attribute on a normal variable because it always ends up
91 * being @progbits, which ends up allocating space in the vmlinux
92 * executable.)
93 */
94#define RESERVE_BRK(name,sz) \
95 static void __section(.discard.text) __used notrace \
96 __brk_reservation_fn_##name##__(void) { \
97 asm volatile ( \
98 ".pushsection .brk_reservation,\"aw\",@nobits;" \
99 ".brk." #name ":" \
100 " 1:.skip %c0;" \
101 " .size .brk." #name ", . - 1b;" \
102 " .popsection" \
103 : : "i" (sz)); \
104 }
105
106/* Helper for reserving space for arrays of things */
107#define RESERVE_BRK_ARRAY(type, name, entries) \
108 type *name; \
109 RESERVE_BRK(name, sizeof(type) * entries)
110
111extern void probe_roms(void);
112#ifdef __i386__
113
114asmlinkage void __init i386_start_kernel(void);
115
116#else
117asmlinkage void __init x86_64_start_kernel(char *real_mode);
118asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
119
120#endif /* __i386__ */
121#endif /* _SETUP */
122#else
123#define RESERVE_BRK(name,sz) \
124 .pushsection .brk_reservation,"aw",@nobits; \
125.brk.name: \
1261: .skip sz; \
127 .size .brk.name,.-1b; \
128 .popsection
129#endif /* __ASSEMBLY__ */
130#endif /* _ASM_X86_SETUP_H */