diff options
Diffstat (limited to 'src/northbridge/intel/x4x/early_init.c')
| -rw-r--r-- | src/northbridge/intel/x4x/early_init.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/northbridge/intel/x4x/early_init.c b/src/northbridge/intel/x4x/early_init.c new file mode 100644 index 0000000000..1d43e0aca5 --- /dev/null +++ b/src/northbridge/intel/x4x/early_init.c @@ -0,0 +1,58 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 secunet Security Networks AG + * Copyright (C) 2015 Damien Zammit <damien@zamaudio.com> + * + * 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 <stdint.h> +#include <arch/io.h> +#include "x4x.h" + +void x4x_early_init(void) +{ + u16 reg16; + + const device_t d0f0 = PCI_DEV(0, 0, 0); + + /* Setup MCHBAR. */ + pci_write_config32(d0f0, D0F0_MCHBAR_LO, (uintptr_t)DEFAULT_MCHBAR | 1); + + /* Setup DMIBAR. */ + pci_write_config32(d0f0, D0F0_DMIBAR_LO, (uintptr_t)DEFAULT_DMIBAR | 1); + + /* Setup EPBAR. */ + pci_write_config32(d0f0, D0F0_EPBAR_LO, DEFAULT_EPBAR | 1); + + /* Setup PMBASE */ + pci_write_config32(d0f0, D0F0_PMBASE, DEFAULT_PMBASE | 1); + + /* Setup HECIBAR */ + pci_write_config32(PCI_DEV(0,3,0), 0x10, DEFAULT_HECIBAR); + reg16 = pci_read_config16(PCI_DEV(0,3,0), 0x4); + pci_write_config16(PCI_DEV(0,3,0), 0x4, reg16 | 0x6); + + /* Set C0000-FFFFF to access RAM on both reads and writes */ + pci_write_config8(d0f0, D0F0_PAM(0), 0x30); + pci_write_config8(d0f0, D0F0_PAM(1), 0x33); + pci_write_config8(d0f0, D0F0_PAM(2), 0x33); + pci_write_config8(d0f0, D0F0_PAM(3), 0x33); + pci_write_config8(d0f0, D0F0_PAM(4), 0x33); + pci_write_config8(d0f0, D0F0_PAM(5), 0x33); + pci_write_config8(d0f0, D0F0_PAM(6), 0x33); + + /* Enable internal GFX */ + pci_write_config16(d0f0, D0F0_GGC, 0x0170); + + reg16 = pci_read_config16(d0f0, D0F0_DEVEN); + pci_write_config16(d0f0, D0F0_DEVEN, reg16 | 0x8); +} |