Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9505
-gerrit
commit 31423bfb04e82bee648b6f1349f5bde87bf221b0 Author: Lee Leahy leroy.p.leahy@intel.com Date: Mon Feb 9 21:16:14 2015 -0800
Intel SOC Common: Reset
Move reset support into the Intel common branch. Prevent breaking of existing platforms by using a Kconfig value to select use of the common reset code.
BRANCH=none BUG=None TEST=Build and run on Glados
Change-Id: I5ba86ef585dde3ef4ecdcc198ab615b5c056d985 Signed-off-by: Stefan Reinauer reinauer@chromium.org Original-Commit-Id: 85d8a6d9628a66cc8d73176d460cd6c5bf6bd6b2 Original-Change-Id: I5048ccf3eb593d59301ad8e808c4e281b9a0aa98 Original-Signed-off-by: Lee Leahy Leroy.P.Leahy@intel.com Original-Reviewed-on: https://chromium-review.googlesource.com/248301 Original-Reviewed-by: Aaron Durbin adurbin@chromium.org Original-Commit-Queue: Leroy P Leahy leroy.p.leahy@intel.com Original-Tested-by: Leroy P Leahy leroy.p.leahy@intel.com --- src/soc/intel/common/Kconfig | 4 +++ src/soc/intel/common/Makefile.inc | 2 ++ src/soc/intel/common/reset.c | 54 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+)
diff --git a/src/soc/intel/common/Kconfig b/src/soc/intel/common/Kconfig index 8b02a4a..70f3e01 100644 --- a/src/soc/intel/common/Kconfig +++ b/src/soc/intel/common/Kconfig @@ -17,3 +17,7 @@ config MRC_SETTINGS_CACHE_SIZE endif # CACHE_MRC_SETTINGS
endif # HAVE_MRC + +config COMMON_RESET + bool + default n diff --git a/src/soc/intel/common/Makefile.inc b/src/soc/intel/common/Makefile.inc index 0c39d80..1861ec3 100644 --- a/src/soc/intel/common/Makefile.inc +++ b/src/soc/intel/common/Makefile.inc @@ -2,3 +2,5 @@ ramstage-y += hda_verb.c ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += nvm.c ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c romstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c +ramstage-$(CONFIG_COMMON_RESET) += reset.c +romstage-$(CONFIG_COMMON_RESET) += reset.c diff --git a/src/soc/intel/common/reset.c b/src/soc/intel/common/reset.c new file mode 100644 index 0000000..2046c3b --- /dev/null +++ b/src/soc/intel/common/reset.c @@ -0,0 +1,54 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2014 Google Inc. + * Copyright (C) 2015 Intel Corporation. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/hlt.h> +#include <arch/io.h> +#include <reset.h> + +/* Reset control port */ +#define RST_CNT 0xcf9 +#define FULL_RST (1 << 3) +#define RST_CPU (1 << 2) +#define SYS_RST (1 << 1) + +void hard_reset(void) +{ + /* S0->S5->S0 trip. */ + outb(RST_CPU | SYS_RST | FULL_RST, RST_CNT); + while (1) + hlt(); +} + +void soft_reset(void) +{ + /* PMC_PLTRST# asserted. */ + outb(RST_CPU | SYS_RST, RST_CNT); + while (1) + hlt(); +} + +void cpu_reset(void) +{ + /* Sends INIT# to CPU */ + outb(RST_CPU, RST_CNT); + while (1) + hlt(); +}