diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/reset.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/reset.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/src/soc/amd/stoneyridge/reset.c b/src/soc/amd/stoneyridge/reset.c index 73f944d3aa..886f33cdcc 100644 --- a/src/soc/amd/stoneyridge/reset.c +++ b/src/soc/amd/stoneyridge/reset.c @@ -2,6 +2,7 @@ * This file is part of the coreboot project. * * Copyright (C) 2010 Advanced Micro Devices, Inc. + * Copyright (C) 2017 Google, 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 @@ -13,34 +14,35 @@ * GNU General Public License for more details. */ -// Use simple device model for this file even in ramstage -#define __SIMPLE_DEVICE__ - #include <arch/io.h> #include <reset.h> +#include <soc/northbridge.h> +#include <soc/pci_devs.h> #include <soc/southbridge.h> -#define HT_INIT_CONTROL 0x6c - #define HTIC_BIOSR_Detect (1 << 5) - - -static void set_bios_reset(void) +/* Clear bits 5, 9 & 10, used to signal the reset type */ +static void clear_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); + htic = pci_read_config32(SOC_HT_DEV, HT_INIT_CONTROL); + htic &= ~HTIC_BIOSR_DETECT; + pci_write_config32(SOC_HT_DEV, 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), SYS_RESET); - outb((0 << 3) | (1 << 2) | (1 << 1), SYS_RESET); + clear_bios_reset(); + + /* De-assert and then assert all PwrGood signals on CF9 reset. */ + pm_write16(PWR_RESET_CFG, pm_read16(PWR_RESET_CFG) | + TOGGLE_ALL_PWR_GOOD); + outb(RST_CMD | SYS_RST, SYS_RESET); +} + +void do_soft_reset(void) +{ + clear_bios_reset(); + + /* Assert reset signals only. */ + outb(RST_CMD | SYS_RST, SYS_RESET); } |