diff options
Diffstat (limited to 'pci.h')
| -rw-r--r-- | pci.h | 122 |
1 files changed, 0 insertions, 122 deletions
@@ -1,122 +0,0 @@ -/* - * VBMouse - PCI BIOS communication routines - * Copyright (C) 2022 Javier S. Pedro - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#ifndef PCI_H -#define PCI_H - -typedef unsigned char pcierr; -enum { - PCI_SUCCESSFUL = 0, - PCI_GENERIC_ERROR = 1, - PCI_FUNC_NOT_SUPPORTED = 0x81, - PCI_BAD_VENDOR_ID = 0x83, - PCI_DEVICE_NOT_FOUND = 0x86, - PCI_BAD_REGISTER_NUMBER = 0x87, - PCI_SET_FAILED = 0x88, - PCI_BUFFER_TOO_SMALL = 0x89 -}; - -typedef unsigned short pcisel; - -static pcierr pci_init_bios(void); -#pragma aux pci_init_bios = \ - "mov ax, 0xB101" \ - "int 0x1A" \ - "jc not_found" \ - "cmp ah, 0" \ - "jne not_found" \ - "cmp edx, ' ICP'" \ - "jne not_found" \ - "mov ah, 0" \ - "jmp end" \ - "not_found: mov ah, 1" \ - "end:" \ - __value [ah] \ - __modify [ax bx cx dx] - -static pcierr pci_find_device(pcisel __far *sel, unsigned short vendor_id, unsigned short dev_id, unsigned short index); -#pragma aux pci_find_device = \ - "mov ax, 0xB102" \ - "int 0x1A" \ - "jnc success" \ - "mov ah, 1" \ - "success: mov [es:di], bx" \ - __parm [es di] [dx] [cx] [si] \ - __value [ah] \ - __modify [ax bx] - -/* Reading from configuration space */ - -static pcierr pci_read_config_byte(pcisel sel, unsigned char reg, unsigned char __far *data); -#pragma aux pci_read_config_byte = \ - "mov ax, 0xB108" \ - "int 0x1A" \ - "mov [es:si], cl" \ - __parm [bx] [di] [es si] \ - __value [ah] \ - __modify [ax cx] - -static pcierr pci_read_config_word(pcisel sel, unsigned char reg, unsigned short __far *data); -#pragma aux pci_read_config_word = \ - "mov ax, 0xB109" \ - "int 0x1A" \ - "mov [es:si], cx" \ - __parm [bx] [di] [es si] \ - __value [ah] \ - __modify [ax cx] - -static pcierr pci_read_config_dword(pcisel sel, unsigned char reg, unsigned long __far *data); -#pragma aux pci_read_config_dword = \ - "mov ax, 0xB10A" \ - "int 0x1A" \ - "mov [es:si], ecx" \ - __parm [bx] [di] [es si] \ - __value [ah] \ - __modify [ax cx] - -/* Writing to configuration space */ - -static pcierr pci_write_config_byte(pcisel sel, unsigned char reg, unsigned char data); -#pragma aux pci_write_config_byte = \ - "mov ax, 0xB10B" \ - "int 0x1A" \ - __parm [bx] [di] [cl] \ - __value [ah] \ - __modify [ax] - -static pcierr pci_write_config_word(pcisel sel, unsigned char reg, unsigned short data); -#pragma aux pci_write_config_word = \ - "mov ax, 0xB10C" \ - "int 0x1A" \ - __parm [bx] [di] [cx] \ - __value [ah] \ - __modify [ax cx] - -static pcierr pci_write_config_dword(pcisel sel, unsigned char reg, unsigned long data); -#pragma aux pci_write_config_dword = \ - "mov ax, 0xB10D" \ - "shl esi, 16" \ - "and ecx, 0xFFFF" \ - "or ecx, esi" \ - "int 0x1A" \ - __parm [bx] [di] [si cx] \ - __value [ah] \ - __modify [ax cx] - -#endif |