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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_SETUP_H
2#define _ASM_X86_SETUP_H
Thomas Gleixneref685292007-10-23 22:37:24 +02003
Cyrill Gorcunovdbca1df2009-01-14 23:37:50 +03004#ifdef __KERNEL__
5
Thomas Gleixneref685292007-10-23 22:37:24 +02006#define COMMAND_LINE_SIZE 2048
7
Thomas Gleixneref685292007-10-23 22:37:24 +02008#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
Thomas Gleixneref685292007-10-23 22:37:24 +020017#endif /* __i386__ */
18
H. Peter Anvinfa76dab2007-10-23 22:37:25 +020019#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
Thomas Gleixneref685292007-10-23 22:37:24 +020025#ifndef __ASSEMBLY__
26#include <asm/bootparam.h>
Thomas Gleixner845b3942009-08-19 15:37:03 +020027#include <asm/x86_init.h>
Thomas Gleixneref685292007-10-23 22:37:24 +020028
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053029/* Interrupt control for vSMPowered x86_64 systems */
Ravikiran G Thirumalai70511132009-03-23 23:14:29 -070030#ifdef CONFIG_X86_64
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053031void vsmp_init(void);
Yinghai Lu129d8bc2009-02-25 21:20:50 -080032#else
33static inline void vsmp_init(void) { }
34#endif
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053035
36void setup_bios_corruption_check(void);
37
38#ifdef CONFIG_X86_VISWS
39extern void visws_early_detect(void);
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053040#else
41static inline void visws_early_detect(void) { }
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053042#endif
43
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053044extern unsigned long saved_video_mode;
45
Thomas Gleixner8fee6972009-08-19 14:55:50 +020046extern void reserve_standard_io_resources(void);
47extern void i386_reserve_resources(void);
Thomas Gleixner845b3942009-08-19 15:37:03 +020048extern void setup_default_timer_irq(void);
Thomas Gleixner8fee6972009-08-19 14:55:50 +020049
Alan Cox933b9462011-12-17 17:43:40 +000050#ifdef CONFIG_X86_INTEL_MID
Thomas Gleixner3f4110a2009-08-29 14:54:20 +020051extern void x86_mrst_early_setup(void);
52#else
53static inline void x86_mrst_early_setup(void) { }
54#endif
55
Thomas Gleixnerc751e172010-11-09 12:08:04 -080056#ifdef CONFIG_X86_INTEL_CE
57extern void x86_ce4100_early_setup(void);
58#else
59static inline void x86_ce4100_early_setup(void) { }
60#endif
61
H. Peter Anvinfa76dab2007-10-23 22:37:25 +020062#ifndef _SETUP
63
Thomas Gleixneref685292007-10-23 22:37:24 +020064/*
65 * This is set up by the setup-routine at boot-time
66 */
67extern struct boot_params boot_params;
68
Thomas Gleixneref685292007-10-23 22:37:24 +020069/*
70 * Do NOT EVER look at the BIOS memory size location.
71 * It does not work on many machines.
72 */
73#define LOWMEMSIZE() (0x9f000)
74
Jeremy Fitzhardinge93dbda72009-02-26 17:35:44 -080075/* exceedingly early brk-like allocator */
76extern unsigned long _brk_end;
77void *extend_brk(size_t size, size_t align);
78
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -070079/*
80 * Reserve space in the brk section. The name must be unique within
81 * the file, and somewhat descriptive. The size is in bytes. Must be
82 * used at file scope.
83 *
84 * (This uses a temp function to wrap the asm so we can pass it the
85 * size parameter; otherwise we wouldn't be able to. We can't use a
86 * "section" attribute on a normal variable because it always ends up
87 * being @progbits, which ends up allocating space in the vmlinux
88 * executable.)
89 */
90#define RESERVE_BRK(name,sz) \
Steven Rostedt2895cd22011-04-13 16:43:29 -040091 static void __section(.discard.text) __used notrace \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -070092 __brk_reservation_fn_##name##__(void) { \
93 asm volatile ( \
94 ".pushsection .brk_reservation,\"aw\",@nobits;" \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -070095 ".brk." #name ":" \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -070096 " 1:.skip %c0;" \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -070097 " .size .brk." #name ", . - 1b;" \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -070098 " .popsection" \
99 : : "i" (sz)); \
100 }
101
Jeremy Fitzhardinge161b0272010-09-02 19:35:22 -0700102/* Helper for reserving space for arrays of things */
103#define RESERVE_BRK_ARRAY(type, name, entries) \
104 type *name; \
105 RESERVE_BRK(name, sizeof(type) * entries)
106
Dan Williams5d94e812011-03-08 10:36:19 -0800107extern void probe_roms(void);
Yinghai Lu95a71a42008-06-18 17:27:08 -0700108#ifdef __i386__
109
Yinghai Luf0d43102008-05-29 12:56:36 -0700110void __init i386_start_kernel(void);
111
Jeremy Fitzhardinge102e3b82008-06-25 00:19:09 -0400112#else
113void __init x86_64_start_kernel(char *real_mode);
Jeremy Fitzhardingef97013f2008-06-25 00:19:18 -0400114void __init x86_64_start_reservations(char *real_mode_data);
115
Thomas Gleixneref685292007-10-23 22:37:24 +0200116#endif /* __i386__ */
H. Peter Anvinfa76dab2007-10-23 22:37:25 +0200117#endif /* _SETUP */
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700118#else
119#define RESERVE_BRK(name,sz) \
120 .pushsection .brk_reservation,"aw",@nobits; \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -0700121.brk.name: \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -07001221: .skip sz; \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -0700123 .size .brk.name,.-1b; \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700124 .popsection
Thomas Gleixneref685292007-10-23 22:37:24 +0200125#endif /* __ASSEMBLY__ */
126#endif /* __KERNEL__ */
127
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700128#endif /* _ASM_X86_SETUP_H */