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/reset.c | 45 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/soc/amd/stoneyridge/reset.c (limited to 'src/soc/amd/stoneyridge/reset.c') diff --git a/src/soc/amd/stoneyridge/reset.c b/src/soc/amd/stoneyridge/reset.c new file mode 100644 index 0000000000..e44a886382 --- /dev/null +++ b/src/soc/amd/stoneyridge/reset.c @@ -0,0 +1,45 @@ +/* + * 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. + */ + +// Use simple device model for this file even in ramstage +#define __SIMPLE_DEVICE__ + +#include +#include + +#define HT_INIT_CONTROL 0x6C + #define HTIC_BIOSR_Detect (1 << 5) + + +static void set_bios_reset(void) +{ + u32 htic; + htic = pci_io_read_config32(PCI_DEV(0, 0x18, 0), HT_INIT_CONTROL); + htic &= ~HTIC_BIOSR_Detect; + pci_io_write_config32(PCI_DEV(0, 0x18, 0), HT_INIT_CONTROL, htic); +} + +void do_hard_reset(void) +{ + set_bios_reset(); + /* Try rebooting through port 0xcf9 */ + /* + * Actually it is not a real hard_reset + * --- it only reset coherent link table, + * but not reset link freq and width + */ + outb((0 << 3) | (0 << 2) | (1 << 1), 0xcf9); + outb((0 << 3) | (1 << 2) | (1 << 1), 0xcf9); +} -- cgit v1.2.3