mips_m4k.c: make sure fast_data_area is safe

If load_image address overlap with fast_data_area,
it will caouse different mysterius issues. This patch
should prevent it.

Change-Id: Ibc95e5aa3ac002a59755029496b6a72616e9287f
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-on: http://openocd.zylin.com/1854
Tested-by: jenkins
Reviewed-by: Salvador Arroyo <sarroyofdez@yahoo.es>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/src/target/mips_m4k.c b/src/target/mips_m4k.c
index c2922ce946ea8188d52695c74f2c66ea0aa73353..d7e426521c0c0673e7bd6a5e5aa5944a5fb4f2e1 100644 (file)
--- a/src/target/mips_m4k.c
+++ b/src/target/mips_m4k.c
@@ -1131,6 +1131,7 @@ static int mips_m4k_bulk_write_memory(struct target *target, uint32_t address,
 {
        struct mips32_common *mips32 = target_to_mips32(target);
        struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
+       struct working_area *fast_data_area;
        int retval;
        int write_t = 1;
 
@@ -1157,6 +1158,17 @@ static int mips_m4k_bulk_write_memory(struct target *target, uint32_t address,
                ejtag_info->fast_access_save = -1;
        }
 
+       fast_data_area = mips32->fast_data_area;
+
+       if (address <= fast_data_area->address + fast_data_area->size &&
+                       fast_data_area->address <= address + count) {
+               LOG_ERROR("fast_data (0x%8.8" PRIx32 ") is within write area "
+                         "(0x%8.8" PRIx32 "-0x%8.8" PRIx32 ").",
+                         fast_data_area->address, address, address + count);
+               LOG_ERROR("Change work-area-phys or load_image address!");
+               return ERROR_FAIL;
+       }
+
        /* mips32_pracc_fastdata_xfer requires uint32_t in host endianness, */
        /* but byte array represents target endianness                      */
        uint32_t *t = NULL;