pci_ops_conf1.c

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#include <console/console.h>
#include <arch/io.h>
#include <arch/pciconf.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
/*
 * Functions for accessing PCI configuration space with type 1 accesses
 */

#if PCI_IO_CFG_EXT == 0
#define CONFIG_CMD(bus,devfn, where)   (0x80000000 | (bus << 16) | (devfn << 8) | (where & ~3))
#else
#define CONFIG_CMD(bus,devfn, where)   (0x80000000 | (bus << 16) | (devfn << 8) | ((where & 0xff) & ~3) | ((where & 0xf00)<<16) )
#endif

static uint8_t pci_conf1_read_config8(struct bus *pbus, int bus, int devfn, int where)
{
                outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
                return inb(0xCFC + (where & 3));
}

static uint16_t pci_conf1_read_config16(struct bus *pbus, int bus, int devfn, int where)
{
                outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
                return inw(0xCFC + (where & 2));
}

static uint32_t pci_conf1_read_config32(struct bus *pbus, int bus, int devfn, int where)
{
                outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
                return inl(0xCFC);
}

static void  pci_conf1_write_config8(struct bus *pbus, int bus, int devfn, int where, uint8_t value)
{
                outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
                outb(value, 0xCFC + (where & 3));
}

static void pci_conf1_write_config16(struct bus *pbus, int bus, int devfn, int where, uint16_t value)
{
                outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
                outw(value, 0xCFC + (where & 2));
}

static void pci_conf1_write_config32(struct bus *pbus, int bus, int devfn, int where, uint32_t value)
{
                outl(CONFIG_CMD(bus, devfn, where), 0xCF8);
                outl(value, 0xCFC);
}

#undef CONFIG_CMD

const struct pci_bus_operations pci_cf8_conf1 =
{
        .read8  = pci_conf1_read_config8,
        .read16 = pci_conf1_read_config16,
        .read32 = pci_conf1_read_config32,
        .write8  = pci_conf1_write_config8,
        .write16 = pci_conf1_write_config16,
        .write32 = pci_conf1_write_config32,
};

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