Add a full set of pci access functions.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3479 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/payloads/libpayload/drivers/pci.c b/payloads/libpayload/drivers/pci.c
index c6f48dd..fc1940a 100644
--- a/payloads/libpayload/drivers/pci.c
+++ b/payloads/libpayload/drivers/pci.c
@@ -2,6 +2,7 @@
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
+ * Copyright (C) 2008 coresystems GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -30,32 +31,70 @@
#include <libpayload.h>
#include <pci.h>
+u8 pci_read_config8(pcidev_t device, u16 reg)
+{
+ outl(device | (reg & ~3), 0xCF8);
+ return inb(0xCFC + (reg & 3));
+}
+
+u16 pci_read_config16(pcidev_t device, u16 reg)
+{
+ outl(device | (reg & ~3), 0xCF8);
+ return inw(0xCFC + (reg & 3));
+}
+
+u32 pci_read_config32(pcidev_t device, u16 reg)
+{
+ outl(device | (reg & ~3), 0xCF8);
+ return inl(0xCFC + (reg & 3));
+}
+
+void pci_write_config8(pcidev_t device, u16 reg, u8 val)
+{
+ outl(device | (reg & ~3), 0xCF8);
+ outb(val, 0xCFC + (reg & 3));
+}
+
+void pci_write_config16(pcidev_t device, u16 reg, u16 val)
+{
+ outl(device | (reg & ~3), 0xCF8);
+ outw(val, 0xCFC + (reg & 3));
+}
+
+void pci_write_config32(pcidev_t device, u16 reg, u32 val)
+{
+ outl(device | (reg & ~3), 0xCF8);
+ outl(val, 0xCFC + (reg & 3));
+}
+
static int find_on_bus(int bus, unsigned short vid, unsigned short did,
pcidev_t * dev)
{
int devfn;
- unsigned int val;
+ u32 val;
unsigned char hdr;
for (devfn = 0; devfn < 0x100; devfn++) {
- pci_read_dword(bus, devfn, REG_VENDOR_ID, &val);
+ val = pci_read_config32(PCI_DEV(bus, PCI_SLOT(devfn),
+ PCI_FUNC(devfn)), REG_VENDOR_ID);
if (val == 0xffffffff || val == 0x00000000 ||
val == 0x0000ffff || val == 0xffff0000)
continue;
if (val == ((did << 16) | vid)) {
- *dev = PCIDEV(bus, devfn);
+ *dev = PCI_DEV(bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
return 1;
}
- pci_read_byte(bus, devfn, REG_HEADER_TYPE, &hdr);
-
+ hdr = pci_read_config8(PCI_DEV(bus, PCI_SLOT(devfn),
+ PCI_FUNC(devfn)), REG_HEADER_TYPE);
hdr &= 0x7F;
if (hdr == HEADER_TYPE_BRIDGE || hdr == HEADER_TYPE_CARDBUS) {
unsigned int busses;
- pci_read_dword(bus, devfn, REG_PRIMARY_BUS, &busses);
+ busses = pci_read_config32(PCI_DEV(bus, PCI_SLOT(devfn),
+ PCI_FUNC(devfn)), REG_PRIMARY_BUS);
if (find_on_bus((busses >> 8) & 0xFF, vid, did, dev))
return 1;
}
@@ -64,29 +103,12 @@
return 0;
}
-void pci_read_dword(unsigned int bus, unsigned int devfn,
- unsigned int reg, unsigned int *val)
-{
- outl(PCI_ADDR(bus, devfn, reg), 0xCF8);
- *val = inl(0xCFC);
-}
-
-void pci_read_byte(unsigned int bus, unsigned int devfn,
- unsigned int reg, unsigned char *val)
-{
- outl(PCI_ADDR(bus, devfn, reg), 0xCF8);
- *val = inb(0xCFC + (reg & 3));
-}
-
-int pci_find_device(unsigned short vid, unsigned short did, pcidev_t * dev)
+int pci_find_device(u16 vid, u16 did, pcidev_t * dev)
{
return find_on_bus(0, vid, did, dev);
}
-unsigned int pci_read_resource(pcidev_t dev, int bar)
+u32 pci_read_resource(pcidev_t dev, int bar)
{
- unsigned int val;
- pci_read_dword(PCIDEV_BUS(dev), PCIDEV_DEVFN(dev), 0x10 + (bar * 4),
- &val);
- return val;
+ return pci_read_config32(dev, 0x10 + (bar * 4));
}