blob: ce29bf1e7769b4e94340baee0957e542981ebefd [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright 2015 yhlu
*
* 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 "amd8111.h"
#include <reset.h>
#include <southbridge/amd/common/reset.h>
unsigned get_sbdn(unsigned bus)
{
pci_devfn_t dev;
/* Find the device.
* There can only be one 8111 on a hypertransport chain/bus.
*/
dev = pci_locate_device_on_bus(
PCI_ID(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_PCI),
bus);
return (dev>>15) & 0x1f;
}
static void enable_cf9_x(unsigned sbbusn, unsigned sbdn)
{
pci_devfn_t dev;
uint8_t byte;
dev = PCI_DEV(sbbusn, sbdn+1, 3); //ACPI
/* enable cf9 */
byte = pci_read_config8(dev, 0x41);
byte |= (1<<6) | (1<<5);
pci_write_config8(dev, 0x41, byte);
}
static void enable_cf9(void)
{
unsigned sblk = get_sblk();
unsigned sbbusn = get_sbbusn(sblk);
unsigned sbdn = get_sbdn(sbbusn);
enable_cf9_x(sbbusn, sbdn);
}
void do_board_reset(void)
{
set_bios_reset();
/* reset */
enable_cf9();
outb(0x0e, 0x0cf9); // make sure cf9 is enabled
}
void enable_fid_change_on_sb(unsigned sbbusn, unsigned sbdn)
{
pci_devfn_t dev;
dev = PCI_DEV(sbbusn, sbdn+1, 3); // ACPI
pci_write_config8(dev, 0x74, 4);
/* set VFSMAF (VID/FID System Management Action Field) to 2 */
pci_write_config32(dev, 0x70, 2<<12);
}
static void soft_reset_x(unsigned sbbusn, unsigned sbdn)
{
pci_devfn_t dev;
dev = PCI_DEV(sbbusn, sbdn+1, 0); //ISA
/* Reset */
set_bios_reset();
pci_write_config8(dev, 0x47, 1);
}
void do_soft_reset(void)
{
unsigned sblk = get_sblk();
unsigned sbbusn = get_sbbusn(sblk);
unsigned sbdn = get_sbdn(sbbusn);
return soft_reset_x(sbbusn, sbdn);
}