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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> |
7b27718b | 31 | |
62bd0337 PA |
32 | /* Useful macros */ |
33 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) | |
34 | ||
1b72691c AK |
35 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) |
36 | ||
62bd0337 PA |
37 | extern struct setup_header hdr; |
38 | extern struct boot_params boot_params; | |
39 | ||
40 | /* Basic port I/O */ | |
41 | static inline void outb(u8 v, u16 port) | |
42 | { | |
43 | asm volatile("outb %0,%1" : : "a" (v), "dN" (port)); | |
44 | } | |
45 | static inline u8 inb(u16 port) | |
46 | { | |
47 | u8 v; | |
48 | asm volatile("inb %1,%0" : "=a" (v) : "dN" (port)); | |
49 | return v; | |
50 | } | |
51 | ||
52 | static inline void outw(u16 v, u16 port) | |
53 | { | |
54 | asm volatile("outw %0,%1" : : "a" (v), "dN" (port)); | |
55 | } | |
56 | static inline u16 inw(u16 port) | |
57 | { | |
58 | u16 v; | |
59 | asm volatile("inw %1,%0" : "=a" (v) : "dN" (port)); | |
60 | return v; | |
61 | } | |
62 | ||
63 | static inline void outl(u32 v, u16 port) | |
64 | { | |
5593eaa8 | 65 | asm volatile("outl %0,%1" : : "a" (v), "dN" (port)); |
62bd0337 PA |
66 | } |
67 | static inline u32 inl(u32 port) | |
68 | { | |
69 | u32 v; | |
70 | asm volatile("inl %1,%0" : "=a" (v) : "dN" (port)); | |
71 | return v; | |
72 | } | |
73 | ||
74 | static inline void io_delay(void) | |
75 | { | |
76 | const u16 DELAY_PORT = 0x80; | |
77 | asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT)); | |
78 | } | |
79 | ||
80 | /* These functions are used to reference data in other segments. */ | |
81 | ||
82 | static inline u16 ds(void) | |
83 | { | |
84 | u16 seg; | |
85 | asm("movw %%ds,%0" : "=rm" (seg)); | |
86 | return seg; | |
87 | } | |
88 | ||
89 | static inline void set_fs(u16 seg) | |
90 | { | |
91 | asm volatile("movw %0,%%fs" : : "rm" (seg)); | |
92 | } | |
93 | static inline u16 fs(void) | |
94 | { | |
95 | u16 seg; | |
b015124e | 96 | asm volatile("movw %%fs,%0" : "=rm" (seg)); |
62bd0337 PA |
97 | return seg; |
98 | } | |
99 | ||
100 | static inline void set_gs(u16 seg) | |
101 | { | |
102 | asm volatile("movw %0,%%gs" : : "rm" (seg)); | |
103 | } | |
104 | static inline u16 gs(void) | |
105 | { | |
106 | u16 seg; | |
b015124e | 107 | asm volatile("movw %%gs,%0" : "=rm" (seg)); |
62bd0337 PA |
108 | return seg; |
109 | } | |
110 | ||
111 | typedef unsigned int addr_t; | |
112 | ||
113 | static inline u8 rdfs8(addr_t addr) | |
114 | { | |
115 | u8 v; | |
811a0fff | 116 | asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr)); |
62bd0337 PA |
117 | return v; |
118 | } | |
119 | static inline u16 rdfs16(addr_t addr) | |
120 | { | |
121 | u16 v; | |
b015124e | 122 | asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr)); |
62bd0337 PA |
123 | return v; |
124 | } | |
125 | static inline u32 rdfs32(addr_t addr) | |
126 | { | |
127 | u32 v; | |
b015124e | 128 | asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr)); |
62bd0337 PA |
129 | return v; |
130 | } | |
131 | ||
132 | static inline void wrfs8(u8 v, addr_t addr) | |
133 | { | |
811a0fff | 134 | asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v)); |
62bd0337 PA |
135 | } |
136 | static inline void wrfs16(u16 v, addr_t addr) | |
137 | { | |
811a0fff | 138 | asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v)); |
62bd0337 PA |
139 | } |
140 | static inline void wrfs32(u32 v, addr_t addr) | |
141 | { | |
811a0fff | 142 | asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v)); |
62bd0337 PA |
143 | } |
144 | ||
145 | static inline u8 rdgs8(addr_t addr) | |
146 | { | |
147 | u8 v; | |
811a0fff | 148 | asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr)); |
62bd0337 PA |
149 | return v; |
150 | } | |
151 | static inline u16 rdgs16(addr_t addr) | |
152 | { | |
153 | u16 v; | |
b015124e | 154 | asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr)); |
62bd0337 PA |
155 | return v; |
156 | } | |
157 | static inline u32 rdgs32(addr_t addr) | |
158 | { | |
159 | u32 v; | |
b015124e | 160 | asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr)); |
62bd0337 PA |
161 | return v; |
162 | } | |
163 | ||
164 | static inline void wrgs8(u8 v, addr_t addr) | |
165 | { | |
811a0fff | 166 | asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v)); |
62bd0337 PA |
167 | } |
168 | static inline void wrgs16(u16 v, addr_t addr) | |
169 | { | |
811a0fff | 170 | asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v)); |
62bd0337 PA |
171 | } |
172 | static inline void wrgs32(u32 v, addr_t addr) | |
173 | { | |
811a0fff | 174 | asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v)); |
62bd0337 PA |
175 | } |
176 | ||
177 | /* Note: these only return true/false, not a signed return value! */ | |
178 | static inline int memcmp(const void *s1, const void *s2, size_t len) | |
179 | { | |
180 | u8 diff; | |
181 | asm("repe; cmpsb; setnz %0" | |
182 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
183 | return diff; | |
184 | } | |
185 | ||
186 | static inline int memcmp_fs(const void *s1, addr_t s2, size_t len) | |
187 | { | |
188 | u8 diff; | |
b015124e PA |
189 | asm volatile("fs; repe; cmpsb; setnz %0" |
190 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
62bd0337 PA |
191 | return diff; |
192 | } | |
193 | static inline int memcmp_gs(const void *s1, addr_t s2, size_t len) | |
194 | { | |
195 | u8 diff; | |
b015124e PA |
196 | asm volatile("gs; repe; cmpsb; setnz %0" |
197 | : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); | |
62bd0337 PA |
198 | return diff; |
199 | } | |
200 | ||
201 | static inline int isdigit(int ch) | |
202 | { | |
203 | return (ch >= '0') && (ch <= '9'); | |
204 | } | |
205 | ||
206 | /* Heap -- available for dynamic lists. */ | |
62bd0337 PA |
207 | extern char _end[]; |
208 | extern char *HEAP; | |
209 | extern char *heap_end; | |
210 | #define RESET_HEAP() ((void *)( HEAP = _end )) | |
211 | static inline char *__get_heap(size_t s, size_t a, size_t n) | |
212 | { | |
213 | char *tmp; | |
214 | ||
215 | HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1)); | |
216 | tmp = HEAP; | |
217 | HEAP += s*n; | |
218 | return tmp; | |
219 | } | |
220 | #define GET_HEAP(type, n) \ | |
221 | ((type *)__get_heap(sizeof(type),__alignof__(type),(n))) | |
222 | ||
e6e1ace9 | 223 | static inline bool heap_free(size_t n) |
62bd0337 | 224 | { |
e6e1ace9 | 225 | return (int)(heap_end-HEAP) >= (int)n; |
62bd0337 PA |
226 | } |
227 | ||
228 | /* copy.S */ | |
229 | ||
230 | void copy_to_fs(addr_t dst, void *src, size_t len); | |
231 | void *copy_from_fs(void *dst, addr_t src, size_t len); | |
232 | void copy_to_gs(addr_t dst, void *src, size_t len); | |
233 | void *copy_from_gs(void *dst, addr_t src, size_t len); | |
234 | void *memcpy(void *dst, void *src, size_t len); | |
235 | void *memset(void *dst, int c, size_t len); | |
236 | ||
237 | #define memcpy(d,s,l) __builtin_memcpy(d,s,l) | |
238 | #define memset(d,c,l) __builtin_memset(d,c,l) | |
239 | ||
240 | /* a20.c */ | |
241 | int enable_a20(void); | |
242 | ||
243 | /* apm.c */ | |
244 | int query_apm_bios(void); | |
245 | ||
7a734e7d PA |
246 | /* bioscall.c */ |
247 | struct biosregs { | |
248 | union { | |
249 | struct { | |
250 | u32 edi; | |
251 | u32 esi; | |
252 | u32 ebp; | |
253 | u32 _esp; | |
254 | u32 ebx; | |
255 | u32 edx; | |
256 | u32 ecx; | |
257 | u32 eax; | |
258 | u32 _fsgs; | |
259 | u32 _dses; | |
260 | u32 eflags; | |
261 | }; | |
262 | struct { | |
263 | u16 di, hdi; | |
264 | u16 si, hsi; | |
265 | u16 bp, hbp; | |
266 | u16 _sp, _hsp; | |
267 | u16 bx, hbx; | |
268 | u16 dx, hdx; | |
269 | u16 cx, hcx; | |
270 | u16 ax, hax; | |
271 | u16 gs, fs; | |
272 | u16 es, ds; | |
273 | u16 flags, hflags; | |
274 | }; | |
275 | struct { | |
276 | u8 dil, dih, edi2, edi3; | |
277 | u8 sil, sih, esi2, esi3; | |
278 | u8 bpl, bph, ebp2, ebp3; | |
279 | u8 _spl, _sph, _esp2, _esp3; | |
280 | u8 bl, bh, ebx2, ebx3; | |
281 | u8 dl, dh, edx2, edx3; | |
282 | u8 cl, ch, ecx2, ecx3; | |
283 | u8 al, ah, eax2, eax3; | |
284 | }; | |
285 | }; | |
286 | }; | |
287 | void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg); | |
288 | ||
62bd0337 PA |
289 | /* cmdline.c */ |
290 | int cmdline_find_option(const char *option, char *buffer, int bufsize); | |
70d8abf5 | 291 | int cmdline_find_option_bool(const char *option); |
62bd0337 PA |
292 | |
293 | /* cpu.c, cpucheck.c */ | |
7b27718b JR |
294 | struct cpu_features { |
295 | int level; /* Family, or 64 for x86-64 */ | |
296 | int model; | |
297 | u32 flags[NCAPINTS]; | |
298 | }; | |
299 | extern struct cpu_features cpu; | |
62bd0337 PA |
300 | int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr); |
301 | int validate_cpu(void); | |
302 | ||
303 | /* edd.c */ | |
304 | void query_edd(void); | |
305 | ||
306 | /* header.S */ | |
307 | void __attribute__((noreturn)) die(void); | |
308 | ||
309 | /* mca.c */ | |
310 | int query_mca(void); | |
311 | ||
312 | /* memory.c */ | |
313 | int detect_memory(void); | |
314 | ||
315 | /* pm.c */ | |
316 | void __attribute__((noreturn)) go_to_protected_mode(void); | |
317 | ||
318 | /* pmjump.S */ | |
319 | void __attribute__((noreturn)) | |
320 | protected_mode_jump(u32 entrypoint, u32 bootparams); | |
321 | ||
322 | /* printf.c */ | |
323 | int sprintf(char *buf, const char *fmt, ...); | |
324 | int vsprintf(char *buf, const char *fmt, va_list args); | |
325 | int printf(const char *fmt, ...); | |
326 | ||
7a734e7d PA |
327 | /* regs.c */ |
328 | void initregs(struct biosregs *regs); | |
329 | ||
62bd0337 PA |
330 | /* string.c */ |
331 | int strcmp(const char *str1, const char *str2); | |
332 | size_t strnlen(const char *s, size_t maxlen); | |
333 | unsigned int atou(const char *s); | |
334 | ||
335 | /* tty.c */ | |
336 | void puts(const char *); | |
337 | void putchar(int); | |
338 | int getchar(void); | |
339 | void kbd_flush(void); | |
340 | int getchar_timeout(void); | |
341 | ||
342 | /* video.c */ | |
343 | void set_video(void); | |
344 | ||
e44b7b75 PM |
345 | /* video-mode.c */ |
346 | int set_mode(u16 mode); | |
347 | int mode_defined(u16 mode); | |
348 | void probe_cards(int unsafe); | |
349 | ||
62bd0337 PA |
350 | /* video-vesa.c */ |
351 | void vesa_store_edid(void); | |
352 | ||
62bd0337 PA |
353 | #endif /* __ASSEMBLY__ */ |
354 | ||
355 | #endif /* BOOT_BOOT_H */ |