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Add VB_INIT_OUT_ENABLE_ALTERNATE_OS flag

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This adds a flag to the list of values returned by VbInit(). When
this flag is set, the BIOS may be asked to boot something other than
ChromeOS. If this requires some sort of special preparation, the BIOS
should do it.

BUG=chromium-os:22454
TEST=none

There is no test for this. It requires a change to the BIOS in order
to do anything differently, and we haven't yet decided whether the
BIOS should pay attention to it.

Change-Id: I5d89e7cd5b745ee74b8ace7fa613c0db03eebefd
Reviewed-on: https://gerrit.chromium.org/gerrit/11714
Tested-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Bill Richardson
2011-11-15 11:32:54 -08:00
parent 6a6f85d6bb
commit 0d11efb0dc
4 changed files with 22 additions and 9 deletions
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2
firmware/include/vboot_api.h
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@@ -186,6 +186,8 @@ typedef struct VbCommonParams {
#define VB_INIT_OUT_S3_DEBUG_BOOT 0x00000010
/* BIOS should load any PCI option ROMs it finds, not just internal video */
#define VB_INIT_OUT_ENABLE_OPROM 0x00000020
/* BIOS may be asked to boot something other than ChromeOS */
#define VB_INIT_OUT_ENABLE_ALTERNATE_OS 0x00000040
/* Data only used by VbInit() */