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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 | /* SPDX-License-Identifier: GPL-2.0-only */ /* -*- linux-c -*- ------------------------------------------------------- * * * Copyright (C) 1991, 1992 Linus Torvalds * Copyright 2007 rPath, Inc. - All Rights Reserved * Copyright 2009 Intel Corporation; author H. Peter Anvin * * ----------------------------------------------------------------------- */ /* * Header file for the real-mode kernel code */ #ifndef BOOT_BOOT_H #define BOOT_BOOT_H #define STACK_SIZE 1024 /* Minimum number of bytes for stack */ #ifndef __ASSEMBLY__ #include <linux/stdarg.h> #include <linux/types.h> #include <linux/edd.h> #include <asm/setup.h> #include <asm/asm.h> #include "bitops.h" #include "ctype.h" #include "cpuflags.h" #include "io.h" /* Useful macros */ #define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) extern struct setup_header hdr; extern struct boot_params boot_params; #define cpu_relax() asm volatile("rep; nop") static inline void io_delay(void) { const u16 DELAY_PORT = 0x80; outb(0, DELAY_PORT); } /* These functions are used to reference data in other segments. */ static inline u16 ds(void) { u16 seg; asm("movw %%ds,%0" : "=rm" (seg)); return seg; } static inline void set_fs(u16 seg) { asm volatile("movw %0,%%fs" : : "rm" (seg)); } static inline u16 fs(void) { u16 seg; asm volatile("movw %%fs,%0" : "=rm" (seg)); return seg; } static inline void set_gs(u16 seg) { asm volatile("movw %0,%%gs" : : "rm" (seg)); } static inline u16 gs(void) { u16 seg; asm volatile("movw %%gs,%0" : "=rm" (seg)); return seg; } typedef unsigned int addr_t; static inline u8 rdfs8(addr_t addr) { u8 *ptr = (u8 *)absolute_pointer(addr); u8 v; asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*ptr)); return v; } static inline u16 rdfs16(addr_t addr) { u16 *ptr = (u16 *)absolute_pointer(addr); u16 v; asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*ptr)); return v; } static inline u32 rdfs32(addr_t addr) { u32 *ptr = (u32 *)absolute_pointer(addr); u32 v; asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*ptr)); return v; } static inline void wrfs8(u8 v, addr_t addr) { u8 *ptr = (u8 *)absolute_pointer(addr); asm volatile("movb %1,%%fs:%0" : "+m" (*ptr) : "qi" (v)); } static inline void wrfs16(u16 v, addr_t addr) { u16 *ptr = (u16 *)absolute_pointer(addr); asm volatile("movw %1,%%fs:%0" : "+m" (*ptr) : "ri" (v)); } static inline void wrfs32(u32 v, addr_t addr) { u32 *ptr = (u32 *)absolute_pointer(addr); asm volatile("movl %1,%%fs:%0" : "+m" (*ptr) : "ri" (v)); } static inline u8 rdgs8(addr_t addr) { u8 *ptr = (u8 *)absolute_pointer(addr); u8 v; asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*ptr)); return v; } static inline u16 rdgs16(addr_t addr) { u16 *ptr = (u16 *)absolute_pointer(addr); u16 v; asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*ptr)); return v; } static inline u32 rdgs32(addr_t addr) { u32 *ptr = (u32 *)absolute_pointer(addr); u32 v; asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*ptr)); return v; } static inline void wrgs8(u8 v, addr_t addr) { u8 *ptr = (u8 *)absolute_pointer(addr); asm volatile("movb %1,%%gs:%0" : "+m" (*ptr) : "qi" (v)); } static inline void wrgs16(u16 v, addr_t addr) { u16 *ptr = (u16 *)absolute_pointer(addr); asm volatile("movw %1,%%gs:%0" : "+m" (*ptr) : "ri" (v)); } static inline void wrgs32(u32 v, addr_t addr) { u32 *ptr = (u32 *)absolute_pointer(addr); asm volatile("movl %1,%%gs:%0" : "+m" (*ptr) : "ri" (v)); } /* Note: these only return true/false, not a signed return value! */ static inline bool memcmp_fs(const void *s1, addr_t s2, size_t len) { bool diff; asm volatile("fs; repe; cmpsb" CC_SET(nz) : CC_OUT(nz) (diff), "+D" (s1), "+S" (s2), "+c" (len)); return diff; } static inline bool memcmp_gs(const void *s1, addr_t s2, size_t len) { bool diff; asm volatile("gs; repe; cmpsb" CC_SET(nz) : CC_OUT(nz) (diff), "+D" (s1), "+S" (s2), "+c" (len)); return diff; } /* Heap -- available for dynamic lists. */ extern char _end[]; extern char *HEAP; extern char *heap_end; #define RESET_HEAP() ((void *)( HEAP = _end )) static inline char *__get_heap(size_t s, size_t a, size_t n) { char *tmp; HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1)); tmp = HEAP; HEAP += s*n; return tmp; } #define GET_HEAP(type, n) \ ((type *)__get_heap(sizeof(type),__alignof__(type),(n))) static inline bool heap_free(size_t n) { return (int)(heap_end-HEAP) >= (int)n; } /* copy.S */ void copy_to_fs(addr_t dst, void *src, size_t len); void *copy_from_fs(void *dst, addr_t src, size_t len); void copy_to_gs(addr_t dst, void *src, size_t len); void *copy_from_gs(void *dst, addr_t src, size_t len); /* a20.c */ int enable_a20(void); /* apm.c */ int query_apm_bios(void); /* bioscall.c */ struct biosregs { union { struct { u32 edi; u32 esi; u32 ebp; u32 _esp; u32 ebx; u32 edx; u32 ecx; u32 eax; u32 _fsgs; u32 _dses; u32 eflags; }; struct { u16 di, hdi; u16 si, hsi; u16 bp, hbp; u16 _sp, _hsp; u16 bx, hbx; u16 dx, hdx; u16 cx, hcx; u16 ax, hax; u16 gs, fs; u16 es, ds; u16 flags, hflags; }; struct { u8 dil, dih, edi2, edi3; u8 sil, sih, esi2, esi3; u8 bpl, bph, ebp2, ebp3; u8 _spl, _sph, _esp2, _esp3; u8 bl, bh, ebx2, ebx3; u8 dl, dh, edx2, edx3; u8 cl, ch, ecx2, ecx3; u8 al, ah, eax2, eax3; }; }; }; void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg); /* cmdline.c */ int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *buffer, int bufsize); int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option); static inline int cmdline_find_option(const char *option, char *buffer, int bufsize) { unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr; if (cmd_line_ptr >= 0x100000) return -1; /* inaccessible */ return __cmdline_find_option(cmd_line_ptr, option, buffer, bufsize); } static inline int cmdline_find_option_bool(const char *option) { unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr; if (cmd_line_ptr >= 0x100000) return -1; /* inaccessible */ return __cmdline_find_option_bool(cmd_line_ptr, option); } /* cpu.c, cpucheck.c */ int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr); int check_knl_erratum(void); int validate_cpu(void); /* early_serial_console.c */ extern int early_serial_base; void console_init(void); /* edd.c */ void query_edd(void); /* header.S */ void __attribute__((noreturn)) die(void); /* memory.c */ void detect_memory(void); /* pm.c */ void __attribute__((noreturn)) go_to_protected_mode(void); /* pmjump.S */ void __attribute__((noreturn)) protected_mode_jump(u32 entrypoint, u32 bootparams); /* printf.c */ int sprintf(char *buf, const char *fmt, ...); int vsprintf(char *buf, const char *fmt, va_list args); int printf(const char *fmt, ...); /* regs.c */ void initregs(struct biosregs *regs); /* string.c */ int strcmp(const char *str1, const char *str2); int strncmp(const char *cs, const char *ct, size_t count); size_t strnlen(const char *s, size_t maxlen); unsigned int atou(const char *s); unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base); size_t strlen(const char *s); char *strchr(const char *s, int c); /* tty.c */ void puts(const char *); void putchar(int); int getchar(void); void kbd_flush(void); int getchar_timeout(void); /* video.c */ void set_video(void); /* video-mode.c */ int set_mode(u16 mode); int mode_defined(u16 mode); void probe_cards(int unsafe); /* video-vesa.c */ void vesa_store_edid(void); #endif /* __ASSEMBLY__ */ #endif /* BOOT_BOOT_H */ |