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Introduce halt() 

It's a portable and generic way to halt the system.
Useful when waiting for the platform to reset.

Change-Id: Ie07f3333d294a4d3e982cbc2ab9014c94b39fce0
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/7605
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
This commit is contained in:
Patrick Georgi 2014-11-28 22:00:22 +01:00
parent 5f967492e3
commit 1b2f2a0714
3 changed files with 67 additions and 0 deletions
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33
src/include/halt.h Normal file
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@ -0,0 +1,33 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2014 The ChromiumOS Authors
*
* 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
*/
#ifndef __HALT_H__
#define __HALT_H__
#ifdef __ROMCC__
#include <lib/halt.c>
#else
/**
* halt the system reliably
*/
void __attribute__((noreturn)) halt(void);
#endif /* __ROMCC__ */
#endif /* __HALT_H__ */

5
src/lib/Makefile.inc
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@ -104,6 +104,11 @@ $(obj)/lib/version.smm.o : $(obj)/build.h
romstage-y += bootmode.c romstage-y += bootmode.c
ramstage-y += bootmode.c ramstage-y += bootmode.c
bootblock-y += halt.c
romstage-y += halt.c
ramstage-y += halt.c
smm-y += halt.c
ifeq ($(CONFIG_RELOCATABLE_MODULES),y) ifeq ($(CONFIG_RELOCATABLE_MODULES),y)
ramstage-y += rmodule.c ramstage-y += rmodule.c
romstage-$(CONFIG_RELOCATABLE_RAMSTAGE) += rmodule.c romstage-$(CONFIG_RELOCATABLE_RAMSTAGE) += rmodule.c

29
src/lib/halt.c Normal file
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@ -0,0 +1,29 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2014 The ChromiumOS Authors
*
* 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 <halt.h>
void halt(void) {
while (1) {
hlt();
}
}