sandbox: keep time offset when resetting
The UEFI Self Certification Test (SCT) checks the SetTime() service with
the following steps:
* set date
* reset
* check date matches
To be compliant the sandbox should keep the offset to the host RTC during
resets. The implementation uses the environment variable
UBOOT_SB_TIME_OFFSET to persist the offset.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 80996a9..3d8af0a 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -32,6 +32,9 @@
#include <os.h>
#include <rtc_def.h>
+/* Environment variable for time offset */
+#define ENV_TIME_OFFSET "UBOOT_SB_TIME_OFFSET"
+
/* Operating System Interface */
struct os_mem_hdr {
@@ -798,6 +801,28 @@
return os_jump_to_file(fname);
}
+long os_get_time_offset(void)
+{
+ const char *offset;
+
+ offset = getenv(ENV_TIME_OFFSET);
+ if (offset)
+ return strtol(offset, NULL, 0);
+ return 0;
+}
+
+void os_set_time_offset(long offset)
+{
+ char buf[21];
+ int ret;
+
+ snprintf(buf, sizeof(buf), "%ld", offset);
+ ret = setenv(ENV_TIME_OFFSET, buf, true);
+ if (ret)
+ printf("Could not set environment variable %s\n",
+ ENV_TIME_OFFSET);
+}
+
void os_localtime(struct rtc_time *rt)
{
time_t t = time(NULL);