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Vboot support for GBB flag to reduce boot time warning screen

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This is OFF by default, and must be turned on via the gbb_utility.

BUG=chrome-os-partner:2317
TEST=manual

Build a firmware image and flash it.  Should have the same 30-sec
delay as it does now.  Pressing TAB should show GBB flags = 0x0.

Modify the firmware image using gbb_utility to set GBB flags to 1 and
reboot.  Dev delay should be 2 sec.  Pressing TAB should show GBB
flags = 0x00000001.

Change-Id: If96ab9e7d0d142a9cd9a2c6af3849421d073de5e
Reviewed-on: http://gerrit.chromium.org/gerrit/4829
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Randall Spangler
2011-07-27 13:04:22 -07:00
parent cb320035d8
commit 4d3b127d19
1 changed files with 21 additions and 4 deletions
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25
firmware/lib/vboot_api_kernel.c
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@@ -274,17 +274,24 @@ static VbError_t VbDisplayDebugInfo(VbCommonParams* cparams) {
used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
shared->kernel_version_tpm, 16, 8);
/* Add GBB flags */
used += Strncat(buf + used, "\ngbb.flags: 0x", DEBUG_INFO_SIZE - used);
if (gbb->major_version == GBB_MAJOR_VER && gbb->minor_version >= 1) {
used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used,
gbb->flags, 16, 8);
} else {
used += Strncat(buf + used, "0 (default)", DEBUG_INFO_SIZE - used);
}
/* Make sure we finish with a newline */
used += Strncat(buf + used, "\n", DEBUG_INFO_SIZE - used);
/* TODO: add more interesting data:
* - SHA1 of kernel subkey (assuming we always set it in VbSelectFirmware,
* even in recovery mode, where we just copy it from the root key)
* - Information on current disks
* - Anything else interesting from VbNvStorage */
* - Information on current disks */
buf[DEBUG_INFO_SIZE - 1] = '\0';
VBDEBUG(("VbCheckDisplayKey() wants to show '%s'\n", buf));
return VbExDisplayDebugInfo(buf);
}
@@ -394,20 +401,30 @@ VbError_t VbBootNormal(VbCommonParams* cparams, LoadKernelParams* p) {
#define DEV_DELAY_BEEP1 20000 /* Beep for first time at this time */
#define DEV_DELAY_BEEP2 21000 /* Beep for second time at this time */
#define DEV_DELAY_TIMEOUT 30000 /* Give up at this time */
#define DEV_DELAY_TIMEOUT_SHORT 2000 /* Give up at this time (short delay) */
/* Handle a developer-mode boot */
VbError_t VbBootDeveloper(VbCommonParams* cparams, LoadKernelParams* p) {
GoogleBinaryBlockHeader* gbb = (GoogleBinaryBlockHeader*)cparams->gbb_data;
uint32_t delay_timeout = DEV_DELAY_TIMEOUT;
uint32_t delay_time = 0;
uint32_t allow_usb = 0;
/* Check if USB booting is allowed */
VbNvGet(&vnc, VBNV_DEV_BOOT_USB, &allow_usb);
/* Use a short developer screen delay if indicated by GBB flags */
if (gbb->major_version == GBB_MAJOR_VER && gbb->minor_version >= 1
&& (gbb->flags & GBB_FLAG_DEV_SCREEN_SHORT_DELAY)) {
VBDEBUG(("VbBootDeveloper() - using short developer screen delay\n"));
delay_timeout = DEV_DELAY_TIMEOUT_SHORT;
}
/* Show the dev mode warning screen */
VbDisplayScreen(cparams, VB_SCREEN_DEVELOPER_WARNING, 0);
/* Loop for dev mode warning delay */
for (delay_time = 0; delay_time < DEV_DELAY_TIMEOUT;
for (delay_time = 0; delay_time < delay_timeout;
delay_time += DEV_DELAY_INCREMENT) {
uint32_t key;