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/coreinfo/pci_module.c b/payloads/coreinfo/pci_module.c
index 3e05b8bd540ed13c0a53db7e38c87f37d06100c3..b2cd8a01f5d9eb28295ca94d806a10eeb3a9bc49 100644 (file)
--- a/payloads/coreinfo/pci_module.c
+++ b/payloads/coreinfo/pci_module.c
@@ -94,7 +94,8 @@ static void show_config_space(WINDOW *win, int row, int col, int index)
        devfn = devices[index].device & 0xff;
 
        for (i = 0; i < 64; i += 4)
-               pci_read_dword(bus, devfn, i, ((unsigned int *)&cspace[i]));
+               cspace[i] = pci_read_config32(PCI_DEV(bus, PCI_SLOT(devfn),
+                                       PCI_FUNC(devfn)), i);
 
        for (y = 0; y < 4; y++) {
                for (x = 0; x < 16; x++)
@@ -180,7 +181,10 @@ static void pci_scan_bus(int bus)
 
        for (devfn = 0; devfn < 0x100;) {
                for (func = 0; func < 8; func++, devfn++) {
-                       pci_read_dword(bus, devfn, REG_VENDOR_ID, &val);
+                       pcidev_t dev = PCI_DEV(bus, PCI_SLOT(devfn),
+                                       PCI_FUNC(devfn));
+
+                       val = pci_read_config32(dev, REG_VENDOR_ID);
 
                        /* Nobody home. */
                        if (val == 0xffffffff || val == 0x00000000 ||
@@ -197,14 +201,13 @@ static void pci_scan_bus(int bus)
                        devices[devices_index++].id = val;
 
                        /* If this is a bridge, then follow it. */
-                       pci_read_byte(bus, devfn, REG_HEADER_TYPE, &hdr);
+                       hdr = pci_read_config8(dev, 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(dev, REG_PRIMARY_BUS);
 
                                pci_scan_bus((busses >> 8) & 0xff);
 

diff --git a/payloads/libpayload/drivers/pci.c b/payloads/libpayload/drivers/pci.c
index c6f48dd987b2fde0cccbc5db84ce47a24d217d7c..fc1940afbc8313824a05c513aee27c92463a4f85 100644 (file)
--- 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 @@ static int find_on_bus(int bus, unsigned short vid, unsigned short did,
        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));
 }

diff --git a/payloads/libpayload/include/pci.h b/payloads/libpayload/include/pci.h
index df88e098ab5272be56707a71bd9dd4521d33c218..bcc333ce9ebcf98b2b51af098b87a11fde4cf998 100644 (file)
--- a/payloads/libpayload/include/pci.h
+++ b/payloads/libpayload/include/pci.h
@@ -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
@@ -30,7 +31,8 @@
 #ifndef _PCI_H
 #define _PCI_H
 
-typedef unsigned short pcidev_t;
+#include <arch/types.h>
+typedef u32 pcidev_t;
 
 #define REG_VENDOR_ID   0x00
 #define REG_DEVICE_ID   0x04
@@ -41,21 +43,24 @@ typedef unsigned short pcidev_t;
 #define HEADER_TYPE_BRIDGE  1
 #define HEADER_TYPE_CARDBUS 2
 
-#define PCIDEV(_b, _d) ((((_b) & 0xFF) << 8) | ((_d) & 0xFF))
+#define PCI_ADDR(_bus, _dev, _fn, _reg) \
+(0x80000000 | (_bus << 16) | (_dev << 11) | (_fn << 8) | (_reg & ~3))
 
-#define PCIDEV_BUS(_d) (((_d) >> 8) & 0xFF)
-#define PCIDEV_DEVFN(_d) ((_d) & 0xFF)
+#define PCI_DEV(_bus, _dev, _fn) \
+(0x80000000 | (_bus << 16) | (_dev << 11) | (_fn << 8))
 
-#define PCI_ADDR(_bus, _dev, _reg) \
-(0x80000000 | (_bus << 16) | (_dev << 8) | (_reg & ~3))
+#define PCI_SLOT(_d) ((_d >> 11) & 0x1f)
+#define PCI_FUNC(_d) ((_d >> 8) & 0x7)
 
-void pci_read_dword(unsigned int bus, unsigned int devfn,
-                   unsigned int reg, unsigned int *val);
+u8 pci_read_config8(u32 device, u16 reg);
+u16 pci_read_config16(u32 device, u16 reg);
+u32 pci_read_config32(u32 device, u16 reg);
 
-void pci_read_byte(unsigned int bus, unsigned int devfn,
-                  unsigned int reg, unsigned char *val);
+void pci_write_config8(u32 device, u16 reg, u8 val);
+void pci_write_config16(u32 device, u16 reg, u16 val);
+void pci_write_config32(u32 device, u16 reg, u32 val);
 
-int pci_find_device(unsigned short vid, unsigned short did, pcidev_t *dev);
-unsigned int pci_read_resource(pcidev_t dev, int bar);
+int pci_find_device(u16 vid, u16 did, pcidev_t *dev);
+u32 pci_read_resource(pcidev_t dev, int bar);
 
 #endif