src/southbridge/amd/cimx_wrapper/sb800/bootblock.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2011 Advanced Micro Devices, Inc.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */


#include <arch/io.h>
#include <arch/romcc_io.h>

static void sb800_enable_rom(void)
{
  u32 word;
  u32 dword;
  device_t dev;

  dev = PCI_DEV(0, 0x14, 0x03);
  /* SB800 LPC Bridge 0:20:3:44h.
   * BIT6: Port Enable for serial port 0x3f8-0x3ff
   * BIT29: Port Enable for KBC port 0x60 and 0x64
   * BIT30: Port Enable for ACPI Micro-Controller port 0x66 and 0x62
   */
  dword = pci_io_read_config32(dev, 0x44);
  //dword |= (1<<6) | (1<<29) | (1<<30) ;
  /* Turn on all of LPC IO Port decode enable */
  dword = 0xffffffff;
  pci_io_write_config32(dev, 0x44, dword);

  /* SB800 LPC Bridge 0:20:3:48h.
   * BIT0: Port Enable for SuperIO 0x2E-0x2F 
   * BIT1: Port Enable for SuperIO 0x4E-0x4F 
   * BIT4: Port Enable for LPC ROM Address Arrage2 (0x68-0x6C)
   * BIT6: Port Enable for RTC IO 0x70-0x73
   * BIT21: Port Enable for Port 0x80
   */
  dword = pci_io_read_config32(dev, 0x48);
  dword |= (1<<0) | (1<<1) | (1<<4) | (1<<6) | (1<<21) ;
  pci_io_write_config32(dev, 0x48, dword);

  /* Enable 4MB rom access at 0xFFE00000 - 0xFFFFFFFF */
  /* Set the 4MB enable bits */
  word = pci_io_read_config16(dev, 0x6c);
  word = 0xFFC0; 
  pci_io_write_config16(dev, 0x6c, word);
}

static void bootblock_southbridge_init(void)
{
  /* Setup the rom access for 2M */
  sb800_enable_rom();
}