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authorKyösti Mälkki <kyosti.malkki@gmail.com>2020-01-04 18:04:39 +0200
committerNico Huber <nico.h@gmx.de>2020-01-10 15:28:41 +0000
commitb2680a12e4ddeaa0a33975eb0034feb6649d333c (patch)
treec486831e6f84b6f679a6e47ec86ee6d56bd80e6f /src/drivers/pc80/rtc/option.c
parentda41b6182d22faf0ffa567f8e018078f4a6cbe7a (diff)
drivers/pc80/rtc: Move sanitize_cmos()
Implementation depends on USE_OPTION_TABLE. Change-Id: If7f8f478db3214842b6cc60cd77b4ea81cab6e3a Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38195 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/drivers/pc80/rtc/option.c')
-rw-r--r--src/drivers/pc80/rtc/option.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/drivers/pc80/rtc/option.c b/src/drivers/pc80/rtc/option.c
index c7851e5357..ad77669a8d 100644
--- a/src/drivers/pc80/rtc/option.c
+++ b/src/drivers/pc80/rtc/option.c
@@ -233,3 +233,31 @@ enum cb_err cmos_set_option(const char *name, void *value)
rdev_munmap(&rdev, ct);
return CB_SUCCESS;
}
+
+int cmos_lb_cks_valid(void)
+{
+ return cmos_checksum_valid(LB_CKS_RANGE_START, LB_CKS_RANGE_END, LB_CKS_LOC);
+}
+
+static void cmos_load_defaults(void)
+{
+ size_t length = 128;
+ size_t i;
+
+ const unsigned char *cmos_default =
+ cbfs_boot_map_with_leak("cmos.default",
+ CBFS_COMPONENT_CMOS_DEFAULT, &length);
+ if (!cmos_default)
+ return;
+
+ u8 control_state = cmos_disable_rtc();
+ for (i = 14; i < MIN(128, length); i++)
+ cmos_write_inner(cmos_default[i], i);
+ cmos_restore_rtc(control_state);
+}
+
+void sanitize_cmos(void)
+{
+ if (cmos_error() || !cmos_lb_cks_valid() || CONFIG(STATIC_OPTION_TABLE))
+ cmos_load_defaults();
+}