f88204e02b
Some mainboards have really nice capabilities for posting, beyond
simple POST cards. Further, some can not use a POST card. This
change defines a weak symbol (mainboard_post) that can be overridden
by a real mainboard_post function.
If, for example, you'd like to do something fancy before the payload starts,
you can add this to mainboard.c:
void mainboard_post(u8 value)
{
switch(value){
case POST_TIME_TO_PARTY: some_fancy_lights();
break;
}
}
Maybe the post function should be an entry in the device. We're beginning to over-use
weak symbols.
BUG=None
TEST=Build and boot a google chromebook. Observe that it still works. Use it to drive
some pretty lights.
Change-Id: I3512d2ec34a66c747287191851c3f68b6a7cc1b2
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/1397
Tested-by: build bot (Jenkins)
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2003 Eric Biederman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <arch/io.h>
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#include <console/console.h>
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/* Write POST information */
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/* someday romcc will be gone. */
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#ifndef __ROMCC__
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/* Some mainboards have very nice features beyond just a simple display.
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* They can override this function.
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*/
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void __attribute__((weak)) mainboard_post(uint8_t value)
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{
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}
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#else
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/* This just keeps the number of #ifs to a minimum */
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#define mainboard_post(x)
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#endif
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void post_code(uint8_t value)
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{
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#if !CONFIG_NO_POST
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#if CONFIG_CONSOLE_POST
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print_emerg("POST: 0x");
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print_emerg_hex8(value);
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print_emerg("\n");
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#endif
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outb(value, CONFIG_POST_PORT);
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#endif
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mainboard_post(value);
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}
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