2 * This file is part of the coreboot project.
4 * Copyright (C) 2011 Google Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 static void store_initial_timestamp(void)
24 /* On Cougar Point we have two 32bit scratchpad registers available:
26 * D31:F2 0xd0 (SATA SP)
29 pci_write_config32(PCI_DEV(0, 0x00, 0), 0xdc, tsc.lo);
30 pci_write_config32(PCI_DEV(0, 0x1f, 2), 0xd0, tsc.hi);
34 * Enable Prefetching and Caching.
36 static void enable_spi_prefetch(void)
41 dev = PCI_DEV(0, 0x1f, 0);
43 reg8 = pci_read_config8(dev, 0xdc);
45 reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
46 pci_write_config8(dev, 0xdc, reg8);
49 static void enable_port80_on_lpc(void)
51 device_t dev = PCI_DEV(0, 0x1f, 0);
53 /* Enable port 80 POST on LPC */
54 pci_write_config32(dev, RCBA, DEFAULT_RCBA | 1);
56 RCBA32(GCS) &= (~0x04);
58 volatile u32 *gcs = (volatile u32 *)(DEFAULT_RCBA + GCS);
60 reg32 = reg32 & ~0x04;
66 static void bootblock_southbridge_init(void)
68 #if CONFIG_COLLECT_TIMESTAMPS
69 store_initial_timestamp();
71 enable_spi_prefetch();
72 enable_port80_on_lpc();