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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 | |
7a734e7d | 5 | * Copyright 2009 Intel Corporation; author H. Peter Anvin |
62bd0337 PA |
6 | * |
7 | * This file is part of the Linux kernel, and is made available under | |
8 | * the terms of the GNU General Public License version 2. | |
9 | * | |
10 | * ----------------------------------------------------------------------- */ | |
11 | ||
12 | /* | |
62bd0337 PA |
13 | * Header file for the real-mode kernel code |
14 | */ | |
15 | ||
16 | #ifndef BOOT_BOOT_H | |
17 | #define BOOT_BOOT_H | |
18 | ||
6b6815c6 PA |
19 | #define STACK_SIZE 512 /* Minimum number of bytes for stack */ |
20 | ||
62bd0337 PA |
21 | #ifndef __ASSEMBLY__ |
22 | ||
23 | #include <stdarg.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/edd.h> | |
26 | #include <asm/boot.h> | |
fa76dab9 | 27 | #include <asm/setup.h> |
c2dcfde8 PA |
28 | #include "bitops.h" |
29 | #include <asm/cpufeature.h> | |
7a734e7d | 30 | #include <asm/processor-flags.h> |
6238b47b | 31 | #include "ctype.h" |
7b27718b | 32 | |
62bd0337 PA |
33 | /* Useful macros */ |
34 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) | |
35 | ||
1b72691c AK |
36 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) |
37 | ||
62bd0337 PA |
38 | extern struct setup_header hdr; |
39 | extern struct boot_params boot_params; | |
40 | ||
fa97bdf9 PE |
41 | #define cpu_relax() asm volatile("rep; nop") |
42 | ||
62bd0337 PA |
43 | /* Basic port I/O */ |
44 | static inline void outb(u8 v, u16 port) | |
45 | { | |
46 | asm volatile("outb %0,%1" : : "a" (v), "dN" (port)); | |
47 | } | |
48 | static inline u8 inb(u16 port) | |
49 | { | |
50 | u8 v; | |
51 | asm volatile("inb %1,%0" : "=a" (v) : "dN" (port)); | |
52 | return v; | |
53 | } | |
54 | ||
55 | static inline void outw(u16 v, u16 port) | |
56 | { | |
57 | asm volatile("outw %0,%1" : : "a" (v), "dN" (port)); | |
58 | } | |
59 | static inline u16 inw(u16 port) | |
60 | { | |
61 | u16 v; | |
62 | asm volatile("inw %1,%0" : "=a" (v) : "dN" (port)); | |
63 | return v; | |
64 | } | |
65 | ||
66 | static inline void outl(u32 v, u16 port) | |
67 | { | |
5593eaa8 | 68 | asm volatile("outl %0,%1" : : "a" (v), "dN" (port)); |
62bd0337 | 69 | } |
35f1790e | 70 | static inline u32 inl(u16 port) |
62bd0337 PA |
71 | { |
72 | u32 v; | |
73 | asm volatile("inl %1,%0" : "=a" (v) : "dN" (port)); | |
74 | return v; | |
75 | } | |
76 | ||
77 | static inline void io_delay(void) | |
78 | { | |
79 | const u16 DELAY_PORT = 0x80; | |
80 | asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT)); | |
81 | } | |
82 | ||
83 | /* These functions are used to reference data in other segments. */ | |
84 | ||
85 | static inline u16 ds(void) | |
86 | { | |
87 | u16 seg; | |
88 | asm("movw %%ds,%0" : "=rm" (seg)); | |
89 | return seg; | |
90 | } | |
91 | ||
92 | static inline void set_fs(u16 seg) | |
93 | { | |
94 | asm volatile("movw %0,%%fs" : : "rm" (seg)); | |
95 | } | |
96 | static inline u16 fs(void) | |
97 | { | |
98 | u16 seg; | |
b015124e | 99 | asm volatile("movw %%fs,%0" : "=rm" (seg)); |
62bd0337 PA |
100 | return seg; |
101 | } | |
102 | ||
103 | static inline void set_gs(u16 seg) | |
104 | { | |
105 | asm volatile("movw %0,%%gs" : : "rm" (seg)); | |
106 | } | |
107 | static inline u16 gs(void) | |
108 | { | |
109 | u16 seg; | |
b015124e | 110 | asm volatile("movw %%gs,%0" : "=rm" (seg)); |
62bd0337 PA |
111 | return seg; |
112 | } | |
113 | ||
114 | typedef unsigned int addr_t; | |
115 | ||
116 | static inline u8 rdfs8(addr_t addr) | |
117 | { | |
118 | u8 v; | |
811a0fff | 119 | asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr)); |
62bd0337 PA |
120 | return v; |
121 | } | |
122 | static inline u16 rdfs16(addr_t addr) | |
123 | { | |
124 | u16 v; | |
b015124e | 125 | asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr)); |
62bd0337 PA |
126 | return v; |
127 | } | |
128 | static inline u32 rdfs32(addr_t addr) | |
129 | { | |
130 | u32 v; | |
b015124e | 131 | asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr)); |
62bd0337 PA |
132 | return v; |
133 | } | |
134 | ||
135 | static inline void wrfs8(u8 v, addr_t addr) | |
136 | { | |
811a0fff | 137 | asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v)); |
62bd0337 PA |
138 | } |
139 | static inline void wrfs16(u16 v, addr_t addr) | |
140 | { | |
811a0fff | 141 | asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v)); |
62bd0337 PA |
142 | } |
143 | static inline void wrfs32(u32 v, addr_t addr) | |
144 | { | |
811a0fff | 145 | asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v)); |
62bd0337 PA |
146 | } |
147 | ||
148 | static inline u8 rdgs8(addr_t addr) | |
149 | { | |
150 | u8 v; | |
811a0fff | 151 | asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr)); |
62bd0337 PA |
152 | return v; |
153 | } | |
154 | static inline u16 rdgs16(addr_t addr) | |
155 | { | |
156 | u16 v; | |
b015124e | 157 | asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr)); |
62bd0337 PA |
158 | return v; |
159 | } | |
160 | static inline u32 rdgs32(addr_t addr) | |
161 | { | |
162 | u32 v; | |
b015124e | 163 | asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr)); |
62bd0337 PA |
164 | return v; |
165 | } | |
166 | ||
167 | static inline void wrgs8(u8 v, addr_t addr) | |
168 | { | |
811a0fff | 169 | asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v)); |
62bd0337 PA |
170 | } |
171 | static inline void wrgs16(u16 v, addr_t addr) | |
172 | { | |
811a0fff | 173 | asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v)); |
62bd0337 PA |
174 | } |
175 | static inline void wrgs32(u32 v, addr_t addr) | |
176 | { | |
811a0fff | 177 | asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v)); |
62bd0337 PA |
178 | } |
179 | ||
180 | /* Note: these only return true/false, not a signed return value! */ | |
181 | static inline int memcmp(const void *s1, const void *s2, size_t len) | |
182 | { | |
183 | u8 diff; | |
184 | asm("repe; cmpsb; setnz %0" | |
185 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
186 | return diff; | |
187 | } | |
188 | ||
189 | static inline int memcmp_fs(const void *s1, addr_t s2, size_t len) | |
190 | { | |
191 | u8 diff; | |
b015124e PA |
192 | asm volatile("fs; repe; cmpsb; setnz %0" |
193 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
62bd0337 PA |
194 | return diff; |
195 | } | |
196 | static inline int memcmp_gs(const void *s1, addr_t s2, size_t len) | |
197 | { | |
198 | u8 diff; | |
b015124e PA |
199 | asm volatile("gs; repe; cmpsb; setnz %0" |
200 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
62bd0337 PA |
201 | return diff; |
202 | } | |
203 | ||
62bd0337 | 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 | ||
7a734e7d PA |
244 | /* bioscall.c */ |
245 | struct biosregs { | |
246 | union { | |
247 | struct { | |
248 | u32 edi; | |
249 | u32 esi; | |
250 | u32 ebp; | |
251 | u32 _esp; | |
252 | u32 ebx; | |
253 | u32 edx; | |
254 | u32 ecx; | |
255 | u32 eax; | |
256 | u32 _fsgs; | |
257 | u32 _dses; | |
258 | u32 eflags; | |
259 | }; | |
260 | struct { | |
261 | u16 di, hdi; | |
262 | u16 si, hsi; | |
263 | u16 bp, hbp; | |
264 | u16 _sp, _hsp; | |
265 | u16 bx, hbx; | |
266 | u16 dx, hdx; | |
267 | u16 cx, hcx; | |
268 | u16 ax, hax; | |
269 | u16 gs, fs; | |
270 | u16 es, ds; | |
271 | u16 flags, hflags; | |
272 | }; | |
273 | struct { | |
274 | u8 dil, dih, edi2, edi3; | |
275 | u8 sil, sih, esi2, esi3; | |
276 | u8 bpl, bph, ebp2, ebp3; | |
277 | u8 _spl, _sph, _esp2, _esp3; | |
278 | u8 bl, bh, ebx2, ebx3; | |
279 | u8 dl, dh, edx2, edx3; | |
280 | u8 cl, ch, ecx2, ecx3; | |
281 | u8 al, ah, eax2, eax3; | |
282 | }; | |
283 | }; | |
284 | }; | |
285 | void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg); | |
286 | ||
62bd0337 | 287 | /* cmdline.c */ |
f4ed2877 YL |
288 | int __cmdline_find_option(u32 cmdline_ptr, const char *option, char *buffer, int bufsize); |
289 | int __cmdline_find_option_bool(u32 cmdline_ptr, const char *option); | |
290 | static inline int cmdline_find_option(const char *option, char *buffer, int bufsize) | |
291 | { | |
292 | return __cmdline_find_option(boot_params.hdr.cmd_line_ptr, option, buffer, bufsize); | |
293 | } | |
294 | ||
295 | static inline int cmdline_find_option_bool(const char *option) | |
296 | { | |
297 | return __cmdline_find_option_bool(boot_params.hdr.cmd_line_ptr, option); | |
298 | } | |
299 | ||
62bd0337 PA |
300 | |
301 | /* cpu.c, cpucheck.c */ | |
7b27718b JR |
302 | struct cpu_features { |
303 | int level; /* Family, or 64 for x86-64 */ | |
304 | int model; | |
305 | u32 flags[NCAPINTS]; | |
306 | }; | |
307 | extern struct cpu_features cpu; | |
62bd0337 PA |
308 | int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr); |
309 | int validate_cpu(void); | |
310 | ||
f4ed2877 YL |
311 | /* early_serial_console.c */ |
312 | extern int early_serial_base; | |
313 | void console_init(void); | |
314 | ||
62bd0337 PA |
315 | /* edd.c */ |
316 | void query_edd(void); | |
317 | ||
318 | /* header.S */ | |
319 | void __attribute__((noreturn)) die(void); | |
320 | ||
321 | /* mca.c */ | |
322 | int query_mca(void); | |
323 | ||
324 | /* memory.c */ | |
325 | int detect_memory(void); | |
326 | ||
327 | /* pm.c */ | |
328 | void __attribute__((noreturn)) go_to_protected_mode(void); | |
329 | ||
330 | /* pmjump.S */ | |
331 | void __attribute__((noreturn)) | |
332 | protected_mode_jump(u32 entrypoint, u32 bootparams); | |
333 | ||
334 | /* printf.c */ | |
335 | int sprintf(char *buf, const char *fmt, ...); | |
336 | int vsprintf(char *buf, const char *fmt, va_list args); | |
337 | int printf(const char *fmt, ...); | |
338 | ||
7a734e7d PA |
339 | /* regs.c */ |
340 | void initregs(struct biosregs *regs); | |
341 | ||
62bd0337 PA |
342 | /* string.c */ |
343 | int strcmp(const char *str1, const char *str2); | |
fa97bdf9 | 344 | int strncmp(const char *cs, const char *ct, size_t count); |
62bd0337 PA |
345 | size_t strnlen(const char *s, size_t maxlen); |
346 | unsigned int atou(const char *s); | |
fa97bdf9 | 347 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base); |
62bd0337 PA |
348 | |
349 | /* tty.c */ | |
350 | void puts(const char *); | |
351 | void putchar(int); | |
352 | int getchar(void); | |
353 | void kbd_flush(void); | |
354 | int getchar_timeout(void); | |
355 | ||
356 | /* video.c */ | |
357 | void set_video(void); | |
358 | ||
e44b7b75 PM |
359 | /* video-mode.c */ |
360 | int set_mode(u16 mode); | |
361 | int mode_defined(u16 mode); | |
362 | void probe_cards(int unsafe); | |
363 | ||
62bd0337 PA |
364 | /* video-vesa.c */ |
365 | void vesa_store_edid(void); | |
366 | ||
62bd0337 PA |
367 | #endif /* __ASSEMBLY__ */ |
368 | ||
369 | #endif /* BOOT_BOOT_H */ |