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-rw-r--r--src/include/boot_device.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/include/boot_device.h b/src/include/boot_device.h
index cc70442e1e..c882968e58 100644
--- a/src/include/boot_device.h
+++ b/src/include/boot_device.h
@@ -19,6 +19,22 @@
#include <commonlib/region.h>
/*
+ * Boot device region can be protected by 2 sources, media and controller.
+ * The following modes are identified. It depends on the flash chip and the
+ * controller if mode is actually supported.
+ *
+ * MEDIA_WP : Flash/Boot device enforces write protect
+ * CTRLR_WP : Controller device enforces write protect
+ * CTRLR_RP : Controller device enforces read protect
+ * CTRLR_RWP : Controller device enforces read-write protect
+ */
+enum bootdev_prot_type {
+ CTRLR_WP = 1,
+ CTRLR_RP = 2,
+ CTRLR_RWP = 3,
+ MEDIA_WP = 4,
+};
+/*
* Please note that the read-only boot device may not be coherent with
* the read-write boot device. Thus, mixing mmap() and writeat() is
* most likely not to work so don't rely on such semantics.
@@ -45,6 +61,14 @@ int boot_device_rw_subregion(const struct region *sub,
struct region_device *subrd);
/*
+ * Write protect a sub-region of the boot device represented
+ * by the region device.
+ * Returns 0 on success, < 0 on error.
+ */
+int boot_device_wp_region(struct region_device *rd,
+ const enum bootdev_prot_type type);
+
+/*
* Initialize the boot device. This may be called multiple times within
* a stage so boot device implementations should account for this behavior.
**/