diff options
Diffstat (limited to 'src/southbridge/intel/i82801gx/bootblock_gcc.c')
| -rw-r--r-- | src/southbridge/intel/i82801gx/bootblock_gcc.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801gx/bootblock_gcc.c b/src/southbridge/intel/i82801gx/bootblock_gcc.c new file mode 100644 index 0000000000..996788888a --- /dev/null +++ b/src/southbridge/intel/i82801gx/bootblock_gcc.c @@ -0,0 +1,44 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Sven Schnelle <svens@stackframe.org> + * + * 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 <device/pci_ops.h> +#include <cpu/intel/car/bootblock.h> +#include "i82801gx.h" + +static void enable_spi_prefetch(void) +{ + u8 reg8; + pci_devfn_t dev = PCI_DEV(0, 0x1f, 0); + + reg8 = pci_read_config8(dev, BIOS_CNTL); + reg8 &= ~(3 << 2); + reg8 |= (2 << 2); /* Prefetching and Caching Enabled */ + pci_write_config8(dev, BIOS_CNTL, reg8); +} + +void bootblock_early_southbridge_init(void) +{ + enable_spi_prefetch(); + + /* Enable RCBA */ + pci_devfn_t lpc_dev = PCI_DEV(0, 0x1f, 0); + pci_write_config32(lpc_dev, RCBA, (uintptr_t)DEFAULT_RCBA | 1); + + /* Enable upper 128bytes of CMOS */ + RCBA32(0x3400) = (1 << 2); + + /* Disable watchdog timer */ + RCBA32(GCS) = RCBA32(GCS) | 0x20; +} |