[Feature][T8TSK-251] add get security boot flag API in misc
Only Configure：No
Affected branch：GSW3.0-No-Connman
Affected module：misc
Is it affected on both ZXIC and MTK: only MTK
Self-test: Yes
Doc Update: Need
Change-Id: I873d746ab817a5f88fb27372aeb60b79cdfd2b66
diff --git a/lib/liblynq-misc/lynq_misc.cpp b/lib/liblynq-misc/lynq_misc.cpp
new file mode 100755
index 0000000..1bada46
--- /dev/null
+++ b/lib/liblynq-misc/lynq_misc.cpp
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include "lynq_misc.h"
+#include "log/log.h"
+
+#undef LOG_TAG
+#define LOG_TAG "MISC"
+
+int lynq_get_security_boot_flag(int * enabled_flag)
+{
+ int value, ret;
+ if (enabled_flag == NULL)
+ {
+ RLOGE("input param is null ptr");
+ return -1;
+ }
+ *enabled_flag = 0;
+ FILE *pfile=fopen("/proc/device-tree/chosen/atag,devinfo", "r");
+ if (pfile == NULL)
+ {
+ RLOGE("open devinfo fail");
+ return -1;
+ }
+ ret = fseek(pfile, 0x428, 0);
+ if (ret != 0)
+ {
+ RLOGE("seek file fail");
+ fclose(pfile);
+ return -1;
+ }
+ ret = fread(&value, sizeof (value), 1, pfile);
+ if (ret != 1)
+ {
+ RLOGE("read file fail");
+ fclose(pfile);
+ return -1;
+ }
+ fclose(pfile);
+
+ // the third bit of 32bits at 0x428 (big endian?), 1 for enabled, 0 not enabled
+ *enabled_flag = (value & 0x20) == 0 ? 0 : 1;
+ return 0;
+}