commit daa807c51ef6d5bf6599e649d1777432bea8a3e5
author Randall Spangler <rspangler@chromium.org> Mon Jul 11 10:55:18 2011 -0700
committer Randall Spangler <rspangler@chromium.org> Mon Jul 11 18:16:03 2011 -0700
tree 48d0e5b60822d906a2c88011a5ebdd74b295f316
parent 9619112a574b975476667545e3a326052fa0c50b

Add support for dev_boot_usb flag

BUG=chromium-os:17433
TEST=make && make runtests.  Additional manual tests:

0. Insert a valid dev-signed USB key.

1. Boot with dev switch off.
`crossystem dev_boot_usb` should print 0.

2. Flip dev switch on.
`crossystem dev_boot_usb` should print 0.
Ctrl+U at dev screen should beep, but not boot USB.

3. Type `crossystem dev_boot_usb=1`.  Should succeed.
`crossystem dev_boot_usb` should print 1.

4. Reboot system.
At the dev mode warning, press Ctrl+U
System should boot from USB key
`crossystem dev_boot_usb` should print 0.

5. Flip dev switch off.
`crossystem dev_boot_usb` should print 0.

6. Flip dev switch on.
`crossystem dev_boot_usb` should print 0.

Note that this does not apply to Cr-48, Alex, or ZGB.

Change-Id: Idf85fdd642f38f531c89e5fa5b1679e84936d4da
Reviewed-on: http://gerrit.chromium.org/gerrit/3875
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Randall Spangler <rspangler@chromium.org>

host/lib/crossystem.c

diff --git a/host/lib/crossystem.c b/host/lib/crossystem.c
index 88afde2..eea4899 100644
--- a/host/lib/crossystem.c
+++ b/host/lib/crossystem.c
@@ -367,6 +367,8 @@
       value &= KERN_NV_FWUPDATE_TRIES_MASK;
   } else if (!strcasecmp(name,"loc_idx")) {
     value = VbGetNvStorage(VBNV_LOCALIZATION_INDEX);
+  } else if (!strcasecmp(name,"dev_boot_usb")) {
+    value = VbGetNvStorage(VBNV_DEV_BOOT_USB);
   }
   /* Other parameters */
   else if (!strcasecmp(name,"cros_debug")) {
@@ -444,6 +446,8 @@
     return VbSetNvStorage(VBNV_KERNEL_FIELD, kern_nv);
   } else if (!strcasecmp(name,"loc_idx")) {
     return VbSetNvStorage(VBNV_LOCALIZATION_INDEX, value);
+  } else if (!strcasecmp(name,"dev_boot_usb")) {
+    return VbSetNvStorage(VBNV_DEV_BOOT_USB, value);
   }
 
   return -1;