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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
David Howellsaf170c52012-12-14 22:37:13 +00004#include <uapi/asm/setup.h>
5
Thomas Gleixneref685292007-10-23 22:37:24 +02006#define COMMAND_LINE_SIZE 2048
7
Andi Kleena1ed4dd2013-08-05 15:02:38 -07008#include <linux/linkage.h>
9
Thomas Gleixneref685292007-10-23 22:37:24 +020010#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
Thomas Gleixneref685292007-10-23 22:37:24 +020019#endif /* __i386__ */
20
H. Peter Anvinfa76dab2007-10-23 22:37:25 +020021#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
Thomas Gleixneref685292007-10-23 22:37:24 +020027#ifndef __ASSEMBLY__
28#include <asm/bootparam.h>
Thomas Gleixner845b3942009-08-19 15:37:03 +020029#include <asm/x86_init.h>
Thomas Gleixneref685292007-10-23 22:37:24 +020030
Borislav Petkov5aa3d712013-12-04 20:50:42 +010031extern u64 relocated_ramdisk;
32
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053033/* Interrupt control for vSMPowered x86_64 systems */
Ravikiran G Thirumalai70511132009-03-23 23:14:29 -070034#ifdef CONFIG_X86_64
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053035void vsmp_init(void);
Yinghai Lu129d8bc2009-02-25 21:20:50 -080036#else
37static inline void vsmp_init(void) { }
38#endif
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053039
40void setup_bios_corruption_check(void);
41
Jaswinder Singh Rajput15c55442009-02-02 21:59:19 +053042extern unsigned long saved_video_mode;
43
Thomas Gleixner8fee6972009-08-19 14:55:50 +020044extern void reserve_standard_io_resources(void);
45extern void i386_reserve_resources(void);
Thomas Gleixner845b3942009-08-19 15:37:03 +020046extern void setup_default_timer_irq(void);
Thomas Gleixner8fee6972009-08-19 14:55:50 +020047
Alan Cox933b9462011-12-17 17:43:40 +000048#ifdef CONFIG_X86_INTEL_MID
Kuppuswamy Sathyanarayanan712b6aa2013-10-17 15:35:29 -070049extern void x86_intel_mid_early_setup(void);
Thomas Gleixner3f4110a2009-08-29 14:54:20 +020050#else
Kuppuswamy Sathyanarayanan712b6aa2013-10-17 15:35:29 -070051static inline void x86_intel_mid_early_setup(void) { }
Thomas Gleixner3f4110a2009-08-29 14:54:20 +020052#endif
53
Thomas Gleixnerc751e172010-11-09 12:08:04 -080054#ifdef CONFIG_X86_INTEL_CE
55extern void x86_ce4100_early_setup(void);
56#else
57static inline void x86_ce4100_early_setup(void) { }
58#endif
59
H. Peter Anvinfa76dab2007-10-23 22:37:25 +020060#ifndef _SETUP
61
H. Peter Anvine1fe9ed2014-05-01 14:12:23 -070062#include <asm/espfix.h>
Jiri Kosina535b3dd2015-04-29 18:09:53 +020063#include <linux/kernel.h>
H. Peter Anvine1fe9ed2014-05-01 14:12:23 -070064
Thomas Gleixneref685292007-10-23 22:37:24 +020065/*
66 * This is set up by the setup-routine at boot-time
67 */
68extern struct boot_params boot_params;
Jiri Kosina4545c892015-04-27 13:17:19 +020069extern char _text[];
Thomas Gleixneref685292007-10-23 22:37:24 +020070
Borislav Petkov78cac482015-04-01 12:49:52 +020071static inline bool kaslr_enabled(void)
72{
73 return !!(boot_params.hdr.loadflags & KASLR_FLAG);
74}
75
Jiri Kosina4545c892015-04-27 13:17:19 +020076static inline unsigned long kaslr_offset(void)
77{
78 return (unsigned long)&_text - __START_KERNEL;
79}
80
Thomas Gleixneref685292007-10-23 22:37:24 +020081/*
82 * Do NOT EVER look at the BIOS memory size location.
83 * It does not work on many machines.
84 */
85#define LOWMEMSIZE() (0x9f000)
86
Jeremy Fitzhardinge93dbda72009-02-26 17:35:44 -080087/* exceedingly early brk-like allocator */
88extern unsigned long _brk_end;
89void *extend_brk(size_t size, size_t align);
90
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -070091/*
92 * Reserve space in the brk section. The name must be unique within
93 * the file, and somewhat descriptive. The size is in bytes. Must be
94 * used at file scope.
95 *
96 * (This uses a temp function to wrap the asm so we can pass it the
97 * size parameter; otherwise we wouldn't be able to. We can't use a
98 * "section" attribute on a normal variable because it always ends up
99 * being @progbits, which ends up allocating space in the vmlinux
100 * executable.)
101 */
102#define RESERVE_BRK(name,sz) \
Steven Rostedt2895cd22011-04-13 16:43:29 -0400103 static void __section(.discard.text) __used notrace \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700104 __brk_reservation_fn_##name##__(void) { \
105 asm volatile ( \
106 ".pushsection .brk_reservation,\"aw\",@nobits;" \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -0700107 ".brk." #name ":" \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700108 " 1:.skip %c0;" \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -0700109 " .size .brk." #name ", . - 1b;" \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700110 " .popsection" \
111 : : "i" (sz)); \
112 }
113
Jeremy Fitzhardinge161b0272010-09-02 19:35:22 -0700114/* Helper for reserving space for arrays of things */
115#define RESERVE_BRK_ARRAY(type, name, entries) \
116 type *name; \
117 RESERVE_BRK(name, sizeof(type) * entries)
118
Dan Williams5d94e812011-03-08 10:36:19 -0800119extern void probe_roms(void);
Yinghai Lu95a71a42008-06-18 17:27:08 -0700120#ifdef __i386__
121
Andi Kleena1ed4dd2013-08-05 15:02:38 -0700122asmlinkage void __init i386_start_kernel(void);
Yinghai Luf0d43102008-05-29 12:56:36 -0700123
Jeremy Fitzhardinge102e3b82008-06-25 00:19:09 -0400124#else
Andi Kleena1ed4dd2013-08-05 15:02:38 -0700125asmlinkage void __init x86_64_start_kernel(char *real_mode);
126asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
Jeremy Fitzhardingef97013f2008-06-25 00:19:18 -0400127
Thomas Gleixneref685292007-10-23 22:37:24 +0200128#endif /* __i386__ */
H. Peter Anvinfa76dab2007-10-23 22:37:25 +0200129#endif /* _SETUP */
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700130#else
131#define RESERVE_BRK(name,sz) \
132 .pushsection .brk_reservation,"aw",@nobits; \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -0700133.brk.name: \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -07001341: .skip sz; \
Jeremy Fitzhardinge0b1c7232009-03-14 23:19:38 -0700135 .size .brk.name,.-1b; \
Jeremy Fitzhardinge796216a2009-03-12 16:09:49 -0700136 .popsection
Thomas Gleixneref685292007-10-23 22:37:24 +0200137#endif /* __ASSEMBLY__ */
H. Peter Anvin1965aae2008-10-22 22:26:29 -0700138#endif /* _ASM_X86_SETUP_H */