From 244848462def7075e0c812a2f71c408668cacfe4 Mon Sep 17 00:00:00 2001 From: Marc Jones Date: Thu, 4 May 2017 21:17:45 -0600 Subject: soc: Add AMD Stoney Ridge southbridge code Copy the Hudson/Kern code from southbridge/amd/pi/hudson. This is the first of a series of patches to migrate Stoney Ridge support from cpu, northbridge, and southbridge to soc/ Changes: - add soc/amd/stoneyridge and soc/amd/common - remove all other Husdon versions - update include paths, etc - clean up Kconfig and Makefile - create chip.c to contain chip_ops Change-Id: Ib88a868e654ad127be70ecc506f6b90b784f8d1b Signed-off-by: Marc Jones Reviewed-on: https://review.coreboot.org/19722 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/soc/amd/stoneyridge/bootblock/bootblock.c | 63 +++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/soc/amd/stoneyridge/bootblock/bootblock.c (limited to 'src/soc/amd/stoneyridge/bootblock') diff --git a/src/soc/amd/stoneyridge/bootblock/bootblock.c b/src/soc/amd/stoneyridge/bootblock/bootblock.c new file mode 100644 index 0000000000..32b129862d --- /dev/null +++ b/src/soc/amd/stoneyridge/bootblock/bootblock.c @@ -0,0 +1,63 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2010 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. + */ + +#include +#include +#include + +/* + * Enable 4MB (LPC) ROM access at 0xFFC00000 - 0xFFFFFFFF. + * + * Hardware should enable LPC ROM by pin straps. This function does not + * handle the theoretically possible PCI ROM, FWH, or SPI ROM configurations. + * + * The HUDSON power-on default is to map 512K ROM space. + * + */ +static void hudson_enable_rom(void) +{ + u8 reg8; + pci_devfn_t dev; + + dev = PCI_DEV(0, 0x14, 3); + + /* Decode variable LPC ROM address ranges 1 and 2. */ + reg8 = pci_io_read_config8(dev, 0x48); + reg8 |= (1 << 3) | (1 << 4); + pci_io_write_config8(dev, 0x48, reg8); + + /* LPC ROM address range 1: */ + /* Enable LPC ROM range mirroring start at 0x000e(0000). */ + pci_io_write_config16(dev, 0x68, 0x000e); + /* Enable LPC ROM range mirroring end at 0x000f(ffff). */ + pci_io_write_config16(dev, 0x6a, 0x000f); + + /* LPC ROM address range 2: */ + /* + * Enable LPC ROM range start at: + * 0xfff8(0000): 512KB + * 0xfff0(0000): 1MB + * 0xffe0(0000): 2MB + * 0xffc0(0000): 4MB + */ + pci_io_write_config16(dev, 0x6c, 0x10000 - (CONFIG_COREBOOT_ROMSIZE_KB >> 6)); + /* Enable LPC ROM range end at 0xffff(ffff). */ + pci_io_write_config16(dev, 0x6e, 0xffff); +} + +static void bootblock_southbridge_init(void) +{ + hudson_enable_rom(); +} -- cgit v1.2.3