added PCI expansion ROM support,

works for some ATI and Nvidia AGP cards now.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1851 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

3 files changed, 167 insertions, 0 deletions

diff --git a/src/devices/emulator/pcbios/Config.lb b/src/devices/emulator/pcbios/Config.lb
new file mode 100644
index 0000000000..231b6629b5
--- /dev/null
+++ b/src/devices/emulator/pcbios/Config.lb
@@ -0,0 +1 @@
+object pcibios.o
\ No newline at end of file
diff --git a/src/devices/emulator/pcbios/pcibios.c b/src/devices/emulator/pcbios/pcibios.c
new file mode 100644
index 0000000000..74d25dc627
--- /dev/null
+++ b/src/devices/emulator/pcbios/pcibios.c
@@ -0,0 +1,142 @@
+#include <console/console.h>
+#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()
+{
+	int i, ret = 0;
+	struct device *dev = 0;
+
+	printk_debug("%s AX = %x\n", __func__, X86_AX);
+
+	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' | ' ' << 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 */
+		dev = dev_find_device(X86_DX, X86_CX, dev);
+		if (dev != 0) {
+			X86_BH = dev->bus->secondary;
+			X86_BL = dev->path.u.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.u.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;
+}
diff --git a/src/devices/emulator/pcbios/pcibios.h b/src/devices/emulator/pcbios/pcibios.h
new file mode 100644
index 0000000000..d99bee695e
--- /dev/null
+++ b/src/devices/emulator/pcbios/pcibios.h
@@ -0,0 +1,24 @@
+enum {
+	PCI_BIOS_PRESENT	= 0xB101,
+	FIND_PCI_DEVICE		= 0xB102,
+	FIND_PCI_CLASS_CODE	= 0xB103,
+	GENERATE_SPECIAL_CYCLE	= 0xB106,
+	READ_CONFIG_BYTE	= 0xB108,
+	READ_CONFIG_WORD	= 0xB109,
+	READ_CONFIG_DWORD	= 0xB10A,
+	WRITE_CONFIG_BYTE	= 0xB10B,
+	WRITE_CONFIG_WORD	= 0xB10C,
+	WRITE_CONFIG_DWORD	= 0xB10D,
+	GET_IRQ_ROUTING_OPTIONS	= 0xB10E,
+	SET_PCI_IRQ		= 0xB10F
+};
+
+enum {
+	SUCCESSFUL		= 0x00,
+	FUNC_NOT_SUPPORTED	= 0x81,
+	BAD_VENDOR_ID		= 0x83,
+	DEVICE_NOT_FOUND	= 0x86,
+	BAD_REGISTER_NUMBER	= 0x87,
+	SET_FAILED		= 0x88,
+	BUFFER_TOO_SMALL	= 0x89
+};