1 /* 2 * (C) Copyright 2002 3 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #ifndef _BIOS_H_ 25 #define _BIOS_H_ 26 27 #define OFFS_ES 0 /* 16bit */ 28 #define OFFS_GS 2 /* 16bit */ 29 #define OFFS_DS 4 /* 16bit */ 30 #define OFFS_EDI 6 /* 32bit */ 31 #define OFFS_DI 6 /* low 16 bits of EDI */ 32 #define OFFS_ESI 10 /* 32bit */ 33 #define OFFS_SI 10 /* low 16 bits of ESI */ 34 #define OFFS_EBP 14 /* 32bit */ 35 #define OFFS_BP 14 /* low 16 bits of EBP */ 36 #define OFFS_ESP 18 /* 32bit */ 37 #define OFFS_SP 18 /* low 16 bits of ESP */ 38 #define OFFS_EBX 22 /* 32bit */ 39 #define OFFS_BX 22 /* low 16 bits of EBX */ 40 #define OFFS_BL 22 /* low 8 bits of BX */ 41 #define OFFS_BH 23 /* high 8 bits of BX */ 42 #define OFFS_EDX 26 /* 32bit */ 43 #define OFFS_DX 26 /* low 16 bits of EBX */ 44 #define OFFS_DL 26 /* low 8 bits of BX */ 45 #define OFFS_DH 27 /* high 8 bits of BX */ 46 #define OFFS_ECX 30 /* 32bit */ 47 #define OFFS_CX 30 /* low 16 bits of EBX */ 48 #define OFFS_CL 30 /* low 8 bits of BX */ 49 #define OFFS_CH 31 /* high 8 bits of BX */ 50 #define OFFS_EAX 34 /* 32bit */ 51 #define OFFS_AX 34 /* low 16 bits of EBX */ 52 #define OFFS_AL 34 /* low 8 bits of BX */ 53 #define OFFS_AH 35 /* high 8 bits of BX */ 54 #define OFFS_VECTOR 38 /* 16bit */ 55 #define OFFS_IP 40 /* 16bit */ 56 #define OFFS_CS 42 /* 16bit */ 57 #define OFFS_FLAGS 44 /* 16bit */ 58 59 /* stack at 0x40:0x800 -> 0x800 */ 60 #define SEGMENT 0x40 61 #define STACK 0x800 62 63 /* 64 * save general registers 65 * save some segments 66 * save callers stack segment 67 * setup BIOS segments 68 * setup BIOS stackpointer 69 */ 70 #define MAKE_BIOS_STACK \ 71 pushal; \ 72 pushw %ds; \ 73 pushw %gs; \ 74 pushw %es; \ 75 pushw %ss; \ 76 popw %gs; \ 77 movw $SEGMENT, %ax; \ 78 movw %ax, %ds; \ 79 movw %ax, %es; \ 80 movw %ax, %ss; \ 81 movw %sp, %bp; \ 82 movw $STACK, %sp 83 84 /* 85 * restore callers stack segment 86 * restore some segments 87 * restore general registers 88 */ 89 #define RESTORE_CALLERS_STACK \ 90 pushw %gs; \ 91 popw %ss; \ 92 movw %bp, %sp; \ 93 popw %es; \ 94 popw %gs; \ 95 popw %ds; \ 96 popal 97 98 #ifndef __ASSEMBLY__ 99 #define BIOS_DATA ((char *)0x400) 100 #define BIOS_DATA_SIZE 256 101 #define BIOS_BASE ((char *)0xf0000) 102 #define BIOS_CS 0xf000 103 104 extern ulong __bios_start; 105 extern ulong __bios_size; 106 107 /* these are defined in a 16bit segment and needs 108 * to be accessed with the RELOC_16_xxxx() macros below 109 */ 110 extern u16 ram_in_64kb_chunks; 111 extern u16 bios_equipment; 112 extern u8 pci_last_bus; 113 114 extern void *rm_int00; 115 extern void *rm_int01; 116 extern void *rm_int02; 117 extern void *rm_int03; 118 extern void *rm_int04; 119 extern void *rm_int05; 120 extern void *rm_int06; 121 extern void *rm_int07; 122 extern void *rm_int08; 123 extern void *rm_int09; 124 extern void *rm_int0a; 125 extern void *rm_int0b; 126 extern void *rm_int0c; 127 extern void *rm_int0d; 128 extern void *rm_int0e; 129 extern void *rm_int0f; 130 extern void *rm_int10; 131 extern void *rm_int11; 132 extern void *rm_int12; 133 extern void *rm_int13; 134 extern void *rm_int14; 135 extern void *rm_int15; 136 extern void *rm_int16; 137 extern void *rm_int17; 138 extern void *rm_int18; 139 extern void *rm_int19; 140 extern void *rm_int1a; 141 extern void *rm_int1b; 142 extern void *rm_int1c; 143 extern void *rm_int1d; 144 extern void *rm_int1e; 145 extern void *rm_int1f; 146 extern void *rm_def_int; 147 148 extern void *realmode_reset; 149 extern void *realmode_pci_bios_call_entry; 150 151 #define RELOC_16_LONG(seg, off) (*(u32 *)(seg << 4 | (u32)&off)) 152 #define RELOC_16_WORD(seg, off) (*(u16 *)(seg << 4 | (u32)&off)) 153 #define RELOC_16_BYTE(seg, off) (*(u8 *)(seg << 4 | (u32)&off)) 154 155 #ifdef PCI_BIOS_DEBUG 156 extern u32 num_pci_bios_present; 157 extern u32 num_pci_bios_find_device; 158 extern u32 num_pci_bios_find_class; 159 extern u32 num_pci_bios_generate_special_cycle; 160 extern u32 num_pci_bios_read_cfg_byte; 161 extern u32 num_pci_bios_read_cfg_word; 162 extern u32 num_pci_bios_read_cfg_dword; 163 extern u32 num_pci_bios_write_cfg_byte; 164 extern u32 num_pci_bios_write_cfg_word; 165 extern u32 num_pci_bios_write_cfg_dword; 166 extern u32 num_pci_bios_get_irq_routing; 167 extern u32 num_pci_bios_set_irq; 168 extern u32 num_pci_bios_unknown_function; 169 #endif 170 171 #endif 172 173 #endif 174