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Add CTRL-L in dev screen to support a "legacy boot option"

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This option is disabled per default and can be enabled with
crossystem dev_boot_legacy=1
or by setting the GBB flag
GBB_FLAG_FORCE_DEV_BOOT_LEGACY      0x00000080

BUG=chrome-os-partner:6108
TEST=crossystem dev_boot_legacy=1
     boot to dev mode screen, press CTRL-L, see SeaBIOS start
     (other CLs needed)
BRANCH=link
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>

Change-Id: I593d2be7cff5ca07b8d08012c4514a172bd75a38
Reviewed-on: https://gerrit.chromium.org/gerrit/31265
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Stefan Reinauer <reinauer@chromium.org>
This commit is contained in:
Stefan Reinauer
2012-08-23 15:06:45 -07:00
committed by Gerrit
parent 40bc7b7802
commit a2326ee152
12 changed files with 56 additions and 1 deletions
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12
firmware/lib/vboot_nvstorage.c
View File

@@ -32,6 +32,7 @@
#define DEV_FLAGS_OFFSET 4
#define DEV_BOOT_USB_MASK 0x01
#define DEV_BOOT_SIGNED_ONLY_MASK 0x02
#define DEV_BOOT_LEGACY_MASK 0x04
#define TPM_FLAGS_OFFSET 5
#define TPM_CLEAR_OWNER_REQUEST 0x01
@@ -116,6 +117,10 @@ int VbNvGet(VbNvContext* context, VbNvParam param, uint32_t* dest) {
*dest = (raw[DEV_FLAGS_OFFSET] & DEV_BOOT_USB_MASK ? 1 : 0);
return 0;
case VBNV_DEV_BOOT_LEGACY:
*dest = (raw[DEV_FLAGS_OFFSET] & DEV_BOOT_LEGACY_MASK ? 1 : 0);
return 0;
case VBNV_DEV_BOOT_SIGNED_ONLY:
*dest = (raw[DEV_FLAGS_OFFSET] & DEV_BOOT_SIGNED_ONLY_MASK ? 1 : 0);
return 0;
@@ -210,6 +215,13 @@ int VbNvSet(VbNvContext* context, VbNvParam param, uint32_t value) {
raw[DEV_FLAGS_OFFSET] &= ~DEV_BOOT_USB_MASK;
break;
case VBNV_DEV_BOOT_LEGACY:
if (value)
raw[DEV_FLAGS_OFFSET] |= DEV_BOOT_LEGACY_MASK;
else
raw[DEV_FLAGS_OFFSET] &= ~DEV_BOOT_LEGACY_MASK;
break;
case VBNV_DEV_BOOT_SIGNED_ONLY:
if (value)
raw[DEV_FLAGS_OFFSET] |= DEV_BOOT_SIGNED_ONLY_MASK;