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/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <device/pci.h>
#include <device/pci_ops.h>
/*
* Functions for accessing PCI configuration space with type 1 accesses
*/
#if !IS_ENABLED(CONFIG_PCI_IO_CFG_EXT)
#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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