1
2
3
4
5
6
7
8
9
10
11
12
13
14#ifndef BOOT_BOOT_H
15#define BOOT_BOOT_H
16
17#define STACK_SIZE 1024
18
19#ifndef __ASSEMBLY__
20
21#include <stdarg.h>
22#include <linux/types.h>
23#include <linux/edd.h>
24#include <asm/setup.h>
25#include <asm/asm.h>
26#include "bitops.h"
27#include "ctype.h"
28#include "cpuflags.h"
29
30
31#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
32
33#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
34
35extern struct setup_header hdr;
36extern struct boot_params boot_params;
37
38#define cpu_relax() asm volatile("rep; nop")
39
40
41static inline void outb(u8 v, u16 port)
42{
43 asm volatile("outb %0,%1" : : "a" (v), "dN" (port));
44}
45static inline u8 inb(u16 port)
46{
47 u8 v;
48 asm volatile("inb %1,%0" : "=a" (v) : "dN" (port));
49 return v;
50}
51
52static inline void outw(u16 v, u16 port)
53{
54 asm volatile("outw %0,%1" : : "a" (v), "dN" (port));
55}
56static inline u16 inw(u16 port)
57{
58 u16 v;
59 asm volatile("inw %1,%0" : "=a" (v) : "dN" (port));
60 return v;
61}
62
63static inline void outl(u32 v, u16 port)
64{
65 asm volatile("outl %0,%1" : : "a" (v), "dN" (port));
66}
67static inline u32 inl(u16 port)
68{
69 u32 v;
70 asm volatile("inl %1,%0" : "=a" (v) : "dN" (port));
71 return v;
72}
73
74static inline void io_delay(void)
75{
76 const u16 DELAY_PORT = 0x80;
77 asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT));
78}
79
80
81
82static inline u16 ds(void)
83{
84 u16 seg;
85 asm("movw %%ds,%0" : "=rm" (seg));
86 return seg;
87}
88
89static inline void set_fs(u16 seg)
90{
91 asm volatile("movw %0,%%fs" : : "rm" (seg));
92}
93static inline u16 fs(void)
94{
95 u16 seg;
96 asm volatile("movw %%fs,%0" : "=rm" (seg));
97 return seg;
98}
99
100static inline void set_gs(u16 seg)
101{
102 asm volatile("movw %0,%%gs" : : "rm" (seg));
103}
104static inline u16 gs(void)
105{
106 u16 seg;
107 asm volatile("movw %%gs,%0" : "=rm" (seg));
108 return seg;
109}
110
111typedef unsigned int addr_t;
112
113static inline u8 rdfs8(addr_t addr)
114{
115 u8 v;
116 asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
117 return v;
118}
119static inline u16 rdfs16(addr_t addr)
120{
121 u16 v;
122 asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
123 return v;
124}
125static inline u32 rdfs32(addr_t addr)
126{
127 u32 v;
128 asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
129 return v;
130}
131
132static inline void wrfs8(u8 v, addr_t addr)
133{
134 asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
135}
136static inline void wrfs16(u16 v, addr_t addr)
137{
138 asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
139}
140static inline void wrfs32(u32 v, addr_t addr)
141{
142 asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
143}
144
145static inline u8 rdgs8(addr_t addr)
146{
147 u8 v;
148 asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
149 return v;
150}
151static inline u16 rdgs16(addr_t addr)
152{
153 u16 v;
154 asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
155 return v;
156}
157static inline u32 rdgs32(addr_t addr)
158{
159 u32 v;
160 asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
161 return v;
162}
163
164static inline void wrgs8(u8 v, addr_t addr)
165{
166 asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
167}
168static inline void wrgs16(u16 v, addr_t addr)
169{
170 asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
171}
172static inline void wrgs32(u32 v, addr_t addr)
173{
174 asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
175}
176
177
178static inline bool memcmp_fs(const void *s1, addr_t s2, size_t len)
179{
180 bool diff;
181 asm volatile("fs; repe; cmpsb" CC_SET(nz)
182 : CC_OUT(nz) (diff), "+D" (s1), "+S" (s2), "+c" (len));
183 return diff;
184}
185static inline bool memcmp_gs(const void *s1, addr_t s2, size_t len)
186{
187 bool diff;
188 asm volatile("gs; repe; cmpsb" CC_SET(nz)
189 : CC_OUT(nz) (diff), "+D" (s1), "+S" (s2), "+c" (len));
190 return diff;
191}
192
193
194extern char _end[];
195extern char *HEAP;
196extern char *heap_end;
197#define RESET_HEAP() ((void *)( HEAP = _end ))
198static inline char *__get_heap(size_t s, size_t a, size_t n)
199{
200 char *tmp;
201
202 HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1));
203 tmp = HEAP;
204 HEAP += s*n;
205 return tmp;
206}
207#define GET_HEAP(type, n) \
208 ((type *)__get_heap(sizeof(type),__alignof__(type),(n)))
209
210static inline bool heap_free(size_t n)
211{
212 return (int)(heap_end-HEAP) >= (int)n;
213}
214
215
216
217void copy_to_fs(addr_t dst, void *src, size_t len);
218void *copy_from_fs(void *dst, addr_t src, size_t len);
219void copy_to_gs(addr_t dst, void *src, size_t len);
220void *copy_from_gs(void *dst, addr_t src, size_t len);
221
222
223int enable_a20(void);
224
225
226int query_apm_bios(void);
227
228
229struct biosregs {
230 union {
231 struct {
232 u32 edi;
233 u32 esi;
234 u32 ebp;
235 u32 _esp;
236 u32 ebx;
237 u32 edx;
238 u32 ecx;
239 u32 eax;
240 u32 _fsgs;
241 u32 _dses;
242 u32 eflags;
243 };
244 struct {
245 u16 di, hdi;
246 u16 si, hsi;
247 u16 bp, hbp;
248 u16 _sp, _hsp;
249 u16 bx, hbx;
250 u16 dx, hdx;
251 u16 cx, hcx;
252 u16 ax, hax;
253 u16 gs, fs;
254 u16 es, ds;
255 u16 flags, hflags;
256 };
257 struct {
258 u8 dil, dih, edi2, edi3;
259 u8 sil, sih, esi2, esi3;
260 u8 bpl, bph, ebp2, ebp3;
261 u8 _spl, _sph, _esp2, _esp3;
262 u8 bl, bh, ebx2, ebx3;
263 u8 dl, dh, edx2, edx3;
264 u8 cl, ch, ecx2, ecx3;
265 u8 al, ah, eax2, eax3;
266 };
267 };
268};
269void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg);
270
271
272int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *buffer, int bufsize);
273int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option);
274static inline int cmdline_find_option(const char *option, char *buffer, int bufsize)
275{
276 unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
277
278 if (cmd_line_ptr >= 0x100000)
279 return -1;
280
281 return __cmdline_find_option(cmd_line_ptr, option, buffer, bufsize);
282}
283
284static inline int cmdline_find_option_bool(const char *option)
285{
286 unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
287
288 if (cmd_line_ptr >= 0x100000)
289 return -1;
290
291 return __cmdline_find_option_bool(cmd_line_ptr, option);
292}
293
294
295int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr);
296int check_knl_erratum(void);
297int validate_cpu(void);
298
299
300extern int early_serial_base;
301void console_init(void);
302
303
304void query_edd(void);
305
306
307void __attribute__((noreturn)) die(void);
308
309
310void detect_memory(void);
311
312
313void __attribute__((noreturn)) go_to_protected_mode(void);
314
315
316void __attribute__((noreturn))
317 protected_mode_jump(u32 entrypoint, u32 bootparams);
318
319
320int sprintf(char *buf, const char *fmt, ...);
321int vsprintf(char *buf, const char *fmt, va_list args);
322int printf(const char *fmt, ...);
323
324
325void initregs(struct biosregs *regs);
326
327
328int strcmp(const char *str1, const char *str2);
329int strncmp(const char *cs, const char *ct, size_t count);
330size_t strnlen(const char *s, size_t maxlen);
331unsigned int atou(const char *s);
332unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base);
333size_t strlen(const char *s);
334char *strchr(const char *s, int c);
335
336
337void puts(const char *);
338void putchar(int);
339int getchar(void);
340void kbd_flush(void);
341int getchar_timeout(void);
342
343
344void set_video(void);
345
346
347int set_mode(u16 mode);
348int mode_defined(u16 mode);
349void probe_cards(int unsafe);
350
351
352void vesa_store_edid(void);
353
354#endif
355
356#endif
357
