projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'for-linus' of git://linux-nfs.org/~bfields/linux
[deliverable/linux.git] / arch / i386 / boot / boot.h
CommitLineData
62bd0337
PA		 1/* -*- linux-c -*- ------------------------------------------------------- *
2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 *
6 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2.
8 *
9 * ----------------------------------------------------------------------- */
10
11/*
12 * arch/i386/boot/boot.h
13 *
14 * Header file for the real-mode kernel code
15 */
16
17#ifndef BOOT_BOOT_H
18#define BOOT_BOOT_H
19
20#ifndef __ASSEMBLY__
21
22#include <stdarg.h>
23#include <linux/types.h>
24#include <linux/edd.h>
25#include <asm/boot.h>
26#include <asm/bootparam.h>
27
28/* Useful macros */
29#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
30
31extern struct setup_header hdr;
32extern struct boot_params boot_params;
33
34/* Basic port I/O */
35static inline void outb(u8 v, u16 port)
36{
37 asm volatile("outb %0,%1" : : "a" (v), "dN" (port));
38}
39static inline u8 inb(u16 port)
40{
41 u8 v;
42 asm volatile("inb %1,%0" : "=a" (v) : "dN" (port));
43 return v;
44}
45
46static inline void outw(u16 v, u16 port)
47{
48 asm volatile("outw %0,%1" : : "a" (v), "dN" (port));
49}
50static inline u16 inw(u16 port)
51{
52 u16 v;
53 asm volatile("inw %1,%0" : "=a" (v) : "dN" (port));
54 return v;
55}
56
57static inline void outl(u32 v, u16 port)
58{
5593eaa8 59 asm volatile("outl %0,%1" : : "a" (v), "dN" (port));
62bd0337
PA		 60}
61static inline u32 inl(u32 port)
62{
63 u32 v;
64 asm volatile("inl %1,%0" : "=a" (v) : "dN" (port));
65 return v;
66}
67
68static inline void io_delay(void)
69{
70 const u16 DELAY_PORT = 0x80;
71 asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT));
72}
73
74/* These functions are used to reference data in other segments. */
75
76static inline u16 ds(void)
77{
78 u16 seg;
79 asm("movw %%ds,%0" : "=rm" (seg));
80 return seg;
81}
82
83static inline void set_fs(u16 seg)
84{
85 asm volatile("movw %0,%%fs" : : "rm" (seg));
86}
87static inline u16 fs(void)
88{
89 u16 seg;
90 asm("movw %%fs,%0" : "=rm" (seg));
91 return seg;
92}
93
94static inline void set_gs(u16 seg)
95{
96 asm volatile("movw %0,%%gs" : : "rm" (seg));
97}
98static inline u16 gs(void)
99{
100 u16 seg;
101 asm("movw %%gs,%0" : "=rm" (seg));
102 return seg;
103}
104
105typedef unsigned int addr_t;
106
107static inline u8 rdfs8(addr_t addr)
108{
109 u8 v;
110 asm("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
111 return v;
112}
113static inline u16 rdfs16(addr_t addr)
114{
115 u16 v;
116 asm("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
117 return v;
118}
119static inline u32 rdfs32(addr_t addr)
120{
121 u32 v;
122 asm("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
123 return v;
124}
125
126static inline void wrfs8(u8 v, addr_t addr)
127{
128 asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "r" (v));
129}
130static inline void wrfs16(u16 v, addr_t addr)
131{
132 asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "r" (v));
133}
134static inline void wrfs32(u32 v, addr_t addr)
135{
136 asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "r" (v));
137}
138
139static inline u8 rdgs8(addr_t addr)
140{
141 u8 v;
142 asm("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
143 return v;
144}
145static inline u16 rdgs16(addr_t addr)
146{
147 u16 v;
148 asm("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
149 return v;
150}
151static inline u32 rdgs32(addr_t addr)
152{
153 u32 v;
154 asm("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
155 return v;
156}
157
158static inline void wrgs8(u8 v, addr_t addr)
159{
160 asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "r" (v));
161}
162static inline void wrgs16(u16 v, addr_t addr)
163{
164 asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "r" (v));
165}
166static inline void wrgs32(u32 v, addr_t addr)
167{
168 asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "r" (v));
169}
170
171/* Note: these only return true/false, not a signed return value! */
172static inline int memcmp(const void *s1, const void *s2, size_t len)
173{
174 u8 diff;
175 asm("repe; cmpsb; setnz %0"
176 : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
177 return diff;
178}
179
180static inline int memcmp_fs(const void *s1, addr_t s2, size_t len)
181{
182 u8 diff;
183 asm("fs; repe; cmpsb; setnz %0"
184 : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
185 return diff;
186}
187static inline int memcmp_gs(const void *s1, addr_t s2, size_t len)
188{
189 u8 diff;
190 asm("gs; repe; cmpsb; setnz %0"
191 : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
192 return diff;
193}
194
195static inline int isdigit(int ch)
196{
197 return (ch >= '0') && (ch <= '9');
198}
199
200/* Heap -- available for dynamic lists. */
201#define STACK_SIZE 512 /* Minimum number of bytes for stack */
202
203extern char _end[];
204extern char *HEAP;
205extern char *heap_end;
206#define RESET_HEAP() ((void *)( HEAP = _end ))
207static inline char *__get_heap(size_t s, size_t a, size_t n)
208{
209 char *tmp;
210
211 HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1));
212 tmp = HEAP;
213 HEAP += s*n;
214 return tmp;
215}
216#define GET_HEAP(type, n) \
217 ((type *)__get_heap(sizeof(type),__alignof__(type),(n)))
218
219static inline int heap_free(void)
220{
221 return heap_end-HEAP;
222}
223
224/* copy.S */
225
226void copy_to_fs(addr_t dst, void *src, size_t len);
227void *copy_from_fs(void *dst, addr_t src, size_t len);
228void copy_to_gs(addr_t dst, void *src, size_t len);
229void *copy_from_gs(void *dst, addr_t src, size_t len);
230void *memcpy(void *dst, void *src, size_t len);
231void *memset(void *dst, int c, size_t len);
232
233#define memcpy(d,s,l) __builtin_memcpy(d,s,l)
234#define memset(d,c,l) __builtin_memset(d,c,l)
235
236/* a20.c */
237int enable_a20(void);
238
239/* apm.c */
240int query_apm_bios(void);
241
242/* cmdline.c */
243int cmdline_find_option(const char *option, char *buffer, int bufsize);
244
245/* cpu.c, cpucheck.c */
246int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr);
247int validate_cpu(void);
248
249/* edd.c */
250void query_edd(void);
251
252/* header.S */
253void __attribute__((noreturn)) die(void);
254
255/* mca.c */
256int query_mca(void);
257
258/* memory.c */
259int detect_memory(void);
260
261/* pm.c */
262void __attribute__((noreturn)) go_to_protected_mode(void);
263
264/* pmjump.S */
265void __attribute__((noreturn))
266 protected_mode_jump(u32 entrypoint, u32 bootparams);
267
268/* printf.c */
269int sprintf(char *buf, const char *fmt, ...);
270int vsprintf(char *buf, const char *fmt, va_list args);
271int printf(const char *fmt, ...);
272
273/* string.c */
274int strcmp(const char *str1, const char *str2);
275size_t strnlen(const char *s, size_t maxlen);
276unsigned int atou(const char *s);
277
278/* tty.c */
279void puts(const char *);
280void putchar(int);
281int getchar(void);
282void kbd_flush(void);
283int getchar_timeout(void);
284
285/* video.c */
286void set_video(void);
287
288/* video-vesa.c */
289void vesa_store_edid(void);
290
291/* voyager.c */
292int query_voyager(void);
293
294#endif /* __ASSEMBLY__ */
295
296#endif /* BOOT_BOOT_H */
Linux kernel - Deliverables
This page took 0.044823 seconds and 5 git commands to generate.