1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2001-2008 H. Peter Anvin - All Rights Reserved 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, Inc., 53 Temple Place Ste 330, 8 * Boston MA 02111-1307, USA; either version 2 of the License, or 9 * (at your option) any later version; incorporated herein by reference. 10 * 11 * ----------------------------------------------------------------------- */ 12 13 /* 14 * memdisk.h 15 * 16 * Miscellaneous header definitions 17 */ 18 19 #ifndef MEMDISK_H 20 #define MEMDISK_H 21 22 #include <stddef.h> 23 24 /* We use the com32 interface for calling 16-bit code */ 25 #include <com32.h> 26 27 /* define it only for i386 */ 28 #if __SIZEOF_POINTER__ == 4 29 #define __cdecl __attribute__((cdecl,regparm(0))) 30 #endif 31 32 void __cdecl intcall(uint8_t, com32sys_t *, com32sys_t *); 33 34 /* Structure passed in from the real-mode code */ 35 struct real_mode_args { 36 uint32_t rm_return; 37 uint32_t rm_intcall; 38 uint32_t rm_bounce; 39 uint32_t rm_base; 40 uint32_t rm_handle_interrupt; 41 uint32_t rm_gdt; 42 uint32_t rm_size; 43 uint32_t rm_pmjmp; 44 uint32_t rm_rmjmp; 45 }; 46 extern struct real_mode_args rm_args; 47 #define sys_bounce ((void *)rm_args.rm_bounce) 48 49 /* This is the header in the boot sector/setup area */ 50 struct setup_header { 51 char cmdline[0x1f1]; 52 uint8_t setup_secs; 53 uint16_t syssize; 54 uint16_t swap_dev; 55 uint16_t ram_size; 56 uint16_t vid_mode; 57 uint16_t root_dev; 58 uint16_t boot_flag; 59 uint16_t jump; 60 char header[4]; 61 uint16_t version; 62 uint32_t realmode_swtch; 63 uint32_t start_sys; 64 uint8_t type_of_loader; 65 uint8_t loadflags; 66 uint16_t setup_move_size; 67 uint32_t code32_start; 68 uint32_t ramdisk_image; 69 uint32_t ramdisk_size; 70 uint32_t bootsect_kludge; 71 uint16_t head_end_ptr; 72 uint16_t pad1; 73 uint32_t cmd_line_ptr; 74 uint32_t initrd_addr_max; 75 uint32_t esdi; 76 uint32_t edx; 77 uint32_t sssp; 78 uint32_t csip; 79 }; 80 #define shdr ((struct setup_header *)rm_args.rm_base) 81 82 /* Standard routines */ 83 void *memcpy(void *, const void *, size_t); 84 void *memset(void *, int, size_t); 85 void *memmove(void *, const void *, size_t); 86 87 #define strcpy(a,b) __builtin_strcpy(a,b) 88 89 static inline size_t strlen(const char *__a) 90 { 91 const char *__D; 92 size_t __c; 93 94 asm("repne;scasb":"=D"(__D), "=c"(__c) 95 : "D"(__a), "c"(-1), "a"(0), "m"(*__a)); 96 97 return __D - __a - 1; 98 } 99 100 /* memcpy() but returns a pointer to end of buffer */ 101 static inline void *mempcpy(void *__d, const void *__s, unsigned int __n) 102 { 103 memcpy(__d, __s, __n); 104 return (void *)((char *)__d + __n); 105 } 106 107 /* memcmp() */ 108 static inline int memcmp(const void *__a, const void *__b, unsigned int __n) 109 { 110 const unsigned char *__aa = __a; 111 const unsigned char *__bb = __b; 112 int __d; 113 114 while (__n--) { 115 __d = *__bb++ - *__aa++; 116 if (__d) 117 return __d; 118 } 119 120 return 0; 121 } 122 123 static inline void sti(void) 124 { 125 asm volatile("sti"); 126 } 127 128 static inline void cli(void) 129 { 130 asm volatile("cli"); 131 } 132 133 /* Decompression */ 134 extern int check_zip(void *indata, uint32_t size, uint32_t * zbytes_p, 135 uint32_t * dbytes_p, uint32_t * orig_crc, 136 uint32_t * offset_p); 137 extern void *unzip(void *indata, uint32_t zbytes, uint32_t dbytes, 138 uint32_t orig_crc, void *target); 139 140 #endif 141
