diff options
Diffstat (limited to 'util/x86emu/pcbios/pcibios.c')
| -rw-r--r-- | util/x86emu/pcbios/pcibios.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/util/x86emu/pcbios/pcibios.c b/util/x86emu/pcbios/pcibios.c new file mode 100644 index 0000000000..506aad0786 --- /dev/null +++ b/util/x86emu/pcbios/pcibios.c @@ -0,0 +1,185 @@ +/* + * This software and ancillary information (herein called SOFTWARE ) + * called LinuxBIOS is made available under the terms described + * here. The SOFTWARE has been approved for release with associated + * LA-CC Number 00-34 . Unless otherwise indicated, this SOFTWARE has + * been authored by an employee or employees of the University of + * California, operator of the Los Alamos National Laboratory under + * Contract No. W-7405-ENG-36 with the U.S. Department of Energy. The + * U.S. Government has rights to use, reproduce, and distribute this + * SOFTWARE. The public may copy, distribute, prepare derivative works + * and publicly display this SOFTWARE without charge, provided that this + * Notice and any statement of authorship are reproduced on all copies. + * Neither the Government nor the University makes any warranty, express + * or implied, or assumes any liability or responsibility for the use of + * this SOFTWARE. If SOFTWARE is modified to produce derivative works, + * such modified SOFTWARE should be clearly marked, so as not to confuse + * it with the version available from LANL. + */ + /* + * This file is part of the coreboot project. + * + * (c) Copyright 2000, Ron Minnich, Advanced Computing Lab, LANL + * + * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifdef CONFIG_COREBOOT_V2 +#include <console/console.h> +#else +#include <console.h> +#endif +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include <x86emu/x86emu.h> + +#include "pcibios.h" + +int pcibios_handler(void) +{ + int ret = 0; + struct device *dev = 0; + + switch (X86_AX) { + case PCI_BIOS_PRESENT: + X86_AH = 0x00; /* no config space/special cycle support */ + X86_AL = 0x01; /* config mechanism 1 */ + X86_EDX = 'P' | 'C' << 8 | 'I' << 16 | ' ' << 24; + X86_EBX = 0x0210; /* Version 2.10 */ + X86_ECX = 0xFF00; /* FixME: Max bus number */ + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + break; + case FIND_PCI_DEVICE: + /* FixME: support SI != 0 */ +#ifdef CONFIG_COREBOOT_V2 + dev = dev_find_device(X86_DX, X86_CX, dev); +#else + dev = dev_find_pci_device(X86_DX, X86_CX, dev); +#endif + if (dev != 0) { + X86_BH = dev->bus->secondary; + X86_BL = dev->path.pci.devfn; + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case FIND_PCI_CLASS_CODE: + /* FixME: support SI != 0 */ + dev = dev_find_class(X86_ECX, dev); + if (dev != 0) { + X86_BH = dev->bus->secondary; + X86_BL = dev->path.pci.devfn; + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case READ_CONFIG_BYTE: + dev = dev_find_slot(X86_BH, X86_BL); + if (dev != 0) { + X86_CL = pci_read_config8(dev, X86_DI); + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case READ_CONFIG_WORD: + dev = dev_find_slot(X86_BH, X86_BL); + if (dev != 0) { + X86_CX = pci_read_config16(dev, X86_DI); + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case READ_CONFIG_DWORD: + dev = dev_find_slot(X86_BH, X86_BL); + if (dev != 0) { + X86_ECX = pci_read_config32(dev, X86_DI); + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case WRITE_CONFIG_BYTE: + dev = dev_find_slot(X86_BH, X86_BL); + if (dev != 0) { + pci_write_config8(dev, X86_DI, X86_CL); + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case WRITE_CONFIG_WORD: + dev = dev_find_slot(X86_BH, X86_BL); + if (dev != 0) { + pci_write_config16(dev, X86_DI, X86_CX); + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + case WRITE_CONFIG_DWORD: + dev = dev_find_slot(X86_BH, X86_BL); + if (dev != 0) { + pci_write_config16(dev, X86_DI, X86_ECX); + X86_AH = SUCCESSFUL; + X86_EFLAGS &= ~FB_CF; /* clear carry flag */ + ret = 1; + } else { + X86_AH = DEVICE_NOT_FOUND; + X86_EFLAGS |= FB_CF; /* set carry flag */ + ret = 0; + } + break; + default: + X86_AH = FUNC_NOT_SUPPORTED; + X86_EFLAGS |= FB_CF; + break; + } + + return ret; +} |