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