883b8793c9
works for some ATI and Nvidia AGP cards now. git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1851 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
#include <console/console.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <device/pci_ops.h>
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#include <x86emu/x86emu.h>
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#include "pcibios.h"
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int pcibios_handler()
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{
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int i, ret = 0;
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struct device *dev = 0;
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printk_debug("%s AX = %x\n", __func__, X86_AX);
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switch (X86_AX) {
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case PCI_BIOS_PRESENT:
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X86_AH = 0x00; /* no config space/special cycle support */
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X86_AL = 0x01; /* config mechanism 1 */
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X86_EDX = 'P' | 'C' << 8 | 'I' | ' ' << 24;
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X86_EBX = 0x0210; /* Version 2.10 */
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X86_ECX = 0xFF00; /* FixME: Max bus number */
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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break;
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case FIND_PCI_DEVICE:
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/* FixME: support SI != 0 */
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dev = dev_find_device(X86_DX, X86_CX, dev);
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if (dev != 0) {
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X86_BH = dev->bus->secondary;
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X86_BL = dev->path.u.pci.devfn;
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case FIND_PCI_CLASS_CODE:
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/* FixME: support SI != 0 */
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dev = dev_find_class(X86_ECX, dev);
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if (dev != 0) {
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X86_BH = dev->bus->secondary;
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X86_BL = dev->path.u.pci.devfn;
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case READ_CONFIG_BYTE:
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dev = dev_find_slot(X86_BH, X86_BL);
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if (dev != 0) {
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X86_CL = pci_read_config8(dev, X86_DI);
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case READ_CONFIG_WORD:
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dev = dev_find_slot(X86_BH, X86_BL);
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if (dev != 0) {
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X86_CX = pci_read_config16(dev, X86_DI);
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case READ_CONFIG_DWORD:
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dev = dev_find_slot(X86_BH, X86_BL);
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if (dev != 0) {
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X86_ECX = pci_read_config32(dev, X86_DI);
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case WRITE_CONFIG_BYTE:
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dev = dev_find_slot(X86_BH, X86_BL);
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if (dev != 0) {
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pci_write_config8(dev, X86_DI, X86_CL);
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case WRITE_CONFIG_WORD:
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dev = dev_find_slot(X86_BH, X86_BL);
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if (dev != 0) {
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pci_write_config16(dev, X86_DI, X86_CX);
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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case WRITE_CONFIG_DWORD:
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dev = dev_find_slot(X86_BH, X86_BL);
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if (dev != 0) {
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pci_write_config16(dev, X86_DI, X86_ECX);
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X86_AH = SUCCESSFUL;
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X86_EFLAGS &= ~FB_CF; /* clear carry flag */
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ret = 1;
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} else {
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X86_AH = DEVICE_NOT_FOUND;
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X86_EFLAGS |= FB_CF; /* set carry flag */
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ret = 0;
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}
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break;
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default:
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X86_AH = FUNC_NOT_SUPPORTED;
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X86_EFLAGS |= FB_CF;
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break;
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}
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return ret;
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}
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