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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 | /* | |
62bd0337 PA |
12 | * Header file for the real-mode kernel code |
13 | */ | |
14 | ||
15 | #ifndef BOOT_BOOT_H | |
16 | #define BOOT_BOOT_H | |
17 | ||
6b6815c6 PA |
18 | #define STACK_SIZE 512 /* Minimum number of bytes for stack */ |
19 | ||
62bd0337 PA |
20 | #ifndef __ASSEMBLY__ |
21 | ||
22 | #include <stdarg.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/edd.h> | |
25 | #include <asm/boot.h> | |
fa76dab9 | 26 | #include <asm/setup.h> |
c2dcfde8 PA |
27 | #include "bitops.h" |
28 | #include <asm/cpufeature.h> | |
7b27718b | 29 | |
62bd0337 PA |
30 | /* Useful macros */ |
31 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) | |
32 | ||
1b72691c AK |
33 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) |
34 | ||
62bd0337 PA |
35 | extern struct setup_header hdr; |
36 | extern struct boot_params boot_params; | |
37 | ||
38 | /* Basic port I/O */ | |
39 | static inline void outb(u8 v, u16 port) | |
40 | { | |
41 | asm volatile("outb %0,%1" : : "a" (v), "dN" (port)); | |
42 | } | |
43 | static inline u8 inb(u16 port) | |
44 | { | |
45 | u8 v; | |
46 | asm volatile("inb %1,%0" : "=a" (v) : "dN" (port)); | |
47 | return v; | |
48 | } | |
49 | ||
50 | static inline void outw(u16 v, u16 port) | |
51 | { | |
52 | asm volatile("outw %0,%1" : : "a" (v), "dN" (port)); | |
53 | } | |
54 | static inline u16 inw(u16 port) | |
55 | { | |
56 | u16 v; | |
57 | asm volatile("inw %1,%0" : "=a" (v) : "dN" (port)); | |
58 | return v; | |
59 | } | |
60 | ||
61 | static inline void outl(u32 v, u16 port) | |
62 | { | |
5593eaa8 | 63 | asm volatile("outl %0,%1" : : "a" (v), "dN" (port)); |
62bd0337 PA |
64 | } |
65 | static inline u32 inl(u32 port) | |
66 | { | |
67 | u32 v; | |
68 | asm volatile("inl %1,%0" : "=a" (v) : "dN" (port)); | |
69 | return v; | |
70 | } | |
71 | ||
72 | static inline void io_delay(void) | |
73 | { | |
74 | const u16 DELAY_PORT = 0x80; | |
75 | asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT)); | |
76 | } | |
77 | ||
78 | /* These functions are used to reference data in other segments. */ | |
79 | ||
80 | static inline u16 ds(void) | |
81 | { | |
82 | u16 seg; | |
83 | asm("movw %%ds,%0" : "=rm" (seg)); | |
84 | return seg; | |
85 | } | |
86 | ||
87 | static inline void set_fs(u16 seg) | |
88 | { | |
89 | asm volatile("movw %0,%%fs" : : "rm" (seg)); | |
90 | } | |
91 | static inline u16 fs(void) | |
92 | { | |
93 | u16 seg; | |
b015124e | 94 | asm volatile("movw %%fs,%0" : "=rm" (seg)); |
62bd0337 PA |
95 | return seg; |
96 | } | |
97 | ||
98 | static inline void set_gs(u16 seg) | |
99 | { | |
100 | asm volatile("movw %0,%%gs" : : "rm" (seg)); | |
101 | } | |
102 | static inline u16 gs(void) | |
103 | { | |
104 | u16 seg; | |
b015124e | 105 | asm volatile("movw %%gs,%0" : "=rm" (seg)); |
62bd0337 PA |
106 | return seg; |
107 | } | |
108 | ||
109 | typedef unsigned int addr_t; | |
110 | ||
111 | static inline u8 rdfs8(addr_t addr) | |
112 | { | |
113 | u8 v; | |
811a0fff | 114 | asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr)); |
62bd0337 PA |
115 | return v; |
116 | } | |
117 | static inline u16 rdfs16(addr_t addr) | |
118 | { | |
119 | u16 v; | |
b015124e | 120 | asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr)); |
62bd0337 PA |
121 | return v; |
122 | } | |
123 | static inline u32 rdfs32(addr_t addr) | |
124 | { | |
125 | u32 v; | |
b015124e | 126 | asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr)); |
62bd0337 PA |
127 | return v; |
128 | } | |
129 | ||
130 | static inline void wrfs8(u8 v, addr_t addr) | |
131 | { | |
811a0fff | 132 | asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v)); |
62bd0337 PA |
133 | } |
134 | static inline void wrfs16(u16 v, addr_t addr) | |
135 | { | |
811a0fff | 136 | asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v)); |
62bd0337 PA |
137 | } |
138 | static inline void wrfs32(u32 v, addr_t addr) | |
139 | { | |
811a0fff | 140 | asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v)); |
62bd0337 PA |
141 | } |
142 | ||
143 | static inline u8 rdgs8(addr_t addr) | |
144 | { | |
145 | u8 v; | |
811a0fff | 146 | asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr)); |
62bd0337 PA |
147 | return v; |
148 | } | |
149 | static inline u16 rdgs16(addr_t addr) | |
150 | { | |
151 | u16 v; | |
b015124e | 152 | asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr)); |
62bd0337 PA |
153 | return v; |
154 | } | |
155 | static inline u32 rdgs32(addr_t addr) | |
156 | { | |
157 | u32 v; | |
b015124e | 158 | asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr)); |
62bd0337 PA |
159 | return v; |
160 | } | |
161 | ||
162 | static inline void wrgs8(u8 v, addr_t addr) | |
163 | { | |
811a0fff | 164 | asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v)); |
62bd0337 PA |
165 | } |
166 | static inline void wrgs16(u16 v, addr_t addr) | |
167 | { | |
811a0fff | 168 | asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v)); |
62bd0337 PA |
169 | } |
170 | static inline void wrgs32(u32 v, addr_t addr) | |
171 | { | |
811a0fff | 172 | asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v)); |
62bd0337 PA |
173 | } |
174 | ||
175 | /* Note: these only return true/false, not a signed return value! */ | |
176 | static inline int memcmp(const void *s1, const void *s2, size_t len) | |
177 | { | |
178 | u8 diff; | |
179 | asm("repe; cmpsb; setnz %0" | |
180 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
181 | return diff; | |
182 | } | |
183 | ||
184 | static inline int memcmp_fs(const void *s1, addr_t s2, size_t len) | |
185 | { | |
186 | u8 diff; | |
b015124e PA |
187 | asm volatile("fs; repe; cmpsb; setnz %0" |
188 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
62bd0337 PA |
189 | return diff; |
190 | } | |
191 | static inline int memcmp_gs(const void *s1, addr_t s2, size_t len) | |
192 | { | |
193 | u8 diff; | |
b015124e PA |
194 | asm volatile("gs; repe; cmpsb; setnz %0" |
195 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
62bd0337 PA |
196 | return diff; |
197 | } | |
198 | ||
199 | static inline int isdigit(int ch) | |
200 | { | |
201 | return (ch >= '0') && (ch <= '9'); | |
202 | } | |
203 | ||
204 | /* Heap -- available for dynamic lists. */ | |
62bd0337 PA |
205 | extern char _end[]; |
206 | extern char *HEAP; | |
207 | extern char *heap_end; | |
208 | #define RESET_HEAP() ((void *)( HEAP = _end )) | |
209 | static inline char *__get_heap(size_t s, size_t a, size_t n) | |
210 | { | |
211 | char *tmp; | |
212 | ||
213 | HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1)); | |
214 | tmp = HEAP; | |
215 | HEAP += s*n; | |
216 | return tmp; | |
217 | } | |
218 | #define GET_HEAP(type, n) \ | |
219 | ((type *)__get_heap(sizeof(type),__alignof__(type),(n))) | |
220 | ||
e6e1ace9 | 221 | static inline bool heap_free(size_t n) |
62bd0337 | 222 | { |
e6e1ace9 | 223 | return (int)(heap_end-HEAP) >= (int)n; |
62bd0337 PA |
224 | } |
225 | ||
226 | /* copy.S */ | |
227 | ||
228 | void copy_to_fs(addr_t dst, void *src, size_t len); | |
229 | void *copy_from_fs(void *dst, addr_t src, size_t len); | |
230 | void copy_to_gs(addr_t dst, void *src, size_t len); | |
231 | void *copy_from_gs(void *dst, addr_t src, size_t len); | |
232 | void *memcpy(void *dst, void *src, size_t len); | |
233 | void *memset(void *dst, int c, size_t len); | |
234 | ||
235 | #define memcpy(d,s,l) __builtin_memcpy(d,s,l) | |
236 | #define memset(d,c,l) __builtin_memset(d,c,l) | |
237 | ||
238 | /* a20.c */ | |
239 | int enable_a20(void); | |
240 | ||
241 | /* apm.c */ | |
242 | int query_apm_bios(void); | |
243 | ||
244 | /* cmdline.c */ | |
245 | int cmdline_find_option(const char *option, char *buffer, int bufsize); | |
70d8abf5 | 246 | int cmdline_find_option_bool(const char *option); |
62bd0337 PA |
247 | |
248 | /* cpu.c, cpucheck.c */ | |
7b27718b JR |
249 | struct cpu_features { |
250 | int level; /* Family, or 64 for x86-64 */ | |
251 | int model; | |
252 | u32 flags[NCAPINTS]; | |
253 | }; | |
254 | extern struct cpu_features cpu; | |
62bd0337 PA |
255 | int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr); |
256 | int validate_cpu(void); | |
257 | ||
258 | /* edd.c */ | |
259 | void query_edd(void); | |
260 | ||
261 | /* header.S */ | |
262 | void __attribute__((noreturn)) die(void); | |
263 | ||
264 | /* mca.c */ | |
265 | int query_mca(void); | |
266 | ||
267 | /* memory.c */ | |
268 | int detect_memory(void); | |
269 | ||
270 | /* pm.c */ | |
271 | void __attribute__((noreturn)) go_to_protected_mode(void); | |
272 | ||
273 | /* pmjump.S */ | |
274 | void __attribute__((noreturn)) | |
275 | protected_mode_jump(u32 entrypoint, u32 bootparams); | |
276 | ||
277 | /* printf.c */ | |
278 | int sprintf(char *buf, const char *fmt, ...); | |
279 | int vsprintf(char *buf, const char *fmt, va_list args); | |
280 | int printf(const char *fmt, ...); | |
281 | ||
282 | /* string.c */ | |
283 | int strcmp(const char *str1, const char *str2); | |
284 | size_t strnlen(const char *s, size_t maxlen); | |
285 | unsigned int atou(const char *s); | |
286 | ||
287 | /* tty.c */ | |
288 | void puts(const char *); | |
289 | void putchar(int); | |
290 | int getchar(void); | |
291 | void kbd_flush(void); | |
292 | int getchar_timeout(void); | |
293 | ||
294 | /* video.c */ | |
295 | void set_video(void); | |
296 | ||
e44b7b75 PM |
297 | /* video-mode.c */ |
298 | int set_mode(u16 mode); | |
299 | int mode_defined(u16 mode); | |
300 | void probe_cards(int unsafe); | |
301 | ||
62bd0337 PA |
302 | /* video-vesa.c */ |
303 | void vesa_store_edid(void); | |
304 | ||
62bd0337 PA |
305 | #endif /* __ASSEMBLY__ */ |
306 | ||
307 | #endif /* BOOT_BOOT_H */ |