1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16#ifndef BOOT_BOOT_H
17#define BOOT_BOOT_H
18
19#define STACK_SIZE 512
20
21#ifndef __ASSEMBLY__
22
23#include <stdarg.h>
24#include <linux/types.h>
25#include <linux/edd.h>
26#include <asm/setup.h>
27#include "bitops.h"
28#include "ctype.h"
29#include "cpuflags.h"
30
31
32#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
33
34#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
35
36extern struct setup_header hdr;
37extern struct boot_params boot_params;
38
39#define cpu_relax() asm volatile("rep; nop")
40
41
42static inline void outb(u8 v, u16 port)
43{
44 asm volatile("outb %0,%1" : : "a" (v), "dN" (port));
45}
46static inline u8 inb(u16 port)
47{
48 u8 v;
49 asm volatile("inb %1,%0" : "=a" (v) : "dN" (port));
50 return v;
51}
52
53static inline void outw(u16 v, u16 port)
54{
55 asm volatile("outw %0,%1" : : "a" (v), "dN" (port));
56}
57static inline u16 inw(u16 port)
58{
59 u16 v;
60 asm volatile("inw %1,%0" : "=a" (v) : "dN" (port));
61 return v;
62}
63
64static inline void outl(u32 v, u16 port)
65{
66 asm volatile("outl %0,%1" : : "a" (v), "dN" (port));
67}
68static inline u32 inl(u16 port)
69{
70 u32 v;
71 asm volatile("inl %1,%0" : "=a" (v) : "dN" (port));
72 return v;
73}
74
75static inline void io_delay(void)
76{
77 const u16 DELAY_PORT = 0x80;
78 asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT));
79}
80
81
82
83static inline u16 ds(void)
84{
85 u16 seg;
86 asm("movw %%ds,%0" : "=rm" (seg));
87 return seg;
88}
89
90static inline void set_fs(u16 seg)
91{
92 asm volatile("movw %0,%%fs" : : "rm" (seg));
93}
94static inline u16 fs(void)
95{
96 u16 seg;
97 asm volatile("movw %%fs,%0" : "=rm" (seg));
98 return seg;
99}
100
101static inline void set_gs(u16 seg)
102{
103 asm volatile("movw %0,%%gs" : : "rm" (seg));
104}
105static inline u16 gs(void)
106{
107 u16 seg;
108 asm volatile("movw %%gs,%0" : "=rm" (seg));
109 return seg;
110}
111
112typedef unsigned int addr_t;
113
114static inline u8 rdfs8(addr_t addr)
115{
116 u8 v;
117 asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
118 return v;
119}
120static inline u16 rdfs16(addr_t addr)
121{
122 u16 v;
123 asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
124 return v;
125}
126static inline u32 rdfs32(addr_t addr)
127{
128 u32 v;
129 asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
130 return v;
131}
132
133static inline void wrfs8(u8 v, addr_t addr)
134{
135 asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
136}
137static inline void wrfs16(u16 v, addr_t addr)
138{
139 asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
140}
141static inline void wrfs32(u32 v, addr_t addr)
142{
143 asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
144}
145
146static inline u8 rdgs8(addr_t addr)
147{
148 u8 v;
149 asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
150 return v;
151}
152static inline u16 rdgs16(addr_t addr)
153{
154 u16 v;
155 asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
156 return v;
157}
158static inline u32 rdgs32(addr_t addr)
159{
160 u32 v;
161 asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
162 return v;
163}
164
165static inline void wrgs8(u8 v, addr_t addr)
166{
167 asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
168}
169static inline void wrgs16(u16 v, addr_t addr)
170{
171 asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
172}
173static inline void wrgs32(u32 v, addr_t addr)
174{
175 asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
176}
177
178
179static inline int memcmp_fs(const void *s1, addr_t s2, size_t len)
180{
181 u8 diff;
182 asm volatile("fs; repe; cmpsb; setnz %0"
183 : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
184 return diff;
185}
186static inline int memcmp_gs(const void *s1, addr_t s2, size_t len)
187{
188 u8 diff;
189 asm volatile("gs; repe; cmpsb; setnz %0"
190 : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
191 return diff;
192}
193
194
195extern char _end[];
196extern char *HEAP;
197extern char *heap_end;
198#define RESET_HEAP() ((void *)( HEAP = _end ))
199static inline char *__get_heap(size_t s, size_t a, size_t n)
200{
201 char *tmp;
202
203 HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1));
204 tmp = HEAP;
205 HEAP += s*n;
206 return tmp;
207}
208#define GET_HEAP(type, n) \
209 ((type *)__get_heap(sizeof(type),__alignof__(type),(n)))
210
211static inline bool heap_free(size_t n)
212{
213 return (int)(heap_end-HEAP) >= (int)n;
214}
215
216
217
218void copy_to_fs(addr_t dst, void *src, size_t len);
219void *copy_from_fs(void *dst, addr_t src, size_t len);
220void copy_to_gs(addr_t dst, void *src, size_t len);
221void *copy_from_gs(void *dst, addr_t src, size_t len);
222
223
224int enable_a20(void);
225
226
227int query_apm_bios(void);
228
229
230struct biosregs {
231 union {
232 struct {
233 u32 edi;
234 u32 esi;
235 u32 ebp;
236 u32 _esp;
237 u32 ebx;
238 u32 edx;
239 u32 ecx;
240 u32 eax;
241 u32 _fsgs;
242 u32 _dses;
243 u32 eflags;
244 };
245 struct {
246 u16 di, hdi;
247 u16 si, hsi;
248 u16 bp, hbp;
249 u16 _sp, _hsp;
250 u16 bx, hbx;
251 u16 dx, hdx;
252 u16 cx, hcx;
253 u16 ax, hax;
254 u16 gs, fs;
255 u16 es, ds;
256 u16 flags, hflags;
257 };
258 struct {
259 u8 dil, dih, edi2, edi3;
260 u8 sil, sih, esi2, esi3;
261 u8 bpl, bph, ebp2, ebp3;
262 u8 _spl, _sph, _esp2, _esp3;
263 u8 bl, bh, ebx2, ebx3;
264 u8 dl, dh, edx2, edx3;
265 u8 cl, ch, ecx2, ecx3;
266 u8 al, ah, eax2, eax3;
267 };
268 };
269};
270void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg);
271
272
273int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *buffer, int bufsize);
274int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option);
275static inline int cmdline_find_option(const char *option, char *buffer, int bufsize)
276{
277 unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
278
279 if (cmd_line_ptr >= 0x100000)
280 return -1;
281
282 return __cmdline_find_option(cmd_line_ptr, option, buffer, bufsize);
283}
284
285static inline int cmdline_find_option_bool(const char *option)
286{
287 unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
288
289 if (cmd_line_ptr >= 0x100000)
290 return -1;
291
292 return __cmdline_find_option_bool(cmd_line_ptr, option);
293}
294
295
296int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr);
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
310int 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);
334
335
336void puts(const char *);
337void putchar(int);
338int getchar(void);
339void kbd_flush(void);
340int getchar_timeout(void);
341
342
343void set_video(void);
344
345
346int set_mode(u16 mode);
347int mode_defined(u16 mode);
348void probe_cards(int unsafe);
349
350
351void vesa_store_edid(void);
352
353#endif
354
355#endif
356
