Nokia RX-51: Do not clear unknown memory in lowlevel_init.S

If kernel image in uImage or zImage format is not detected by
lowlevel_init.S code then do not clear memory location where image was
expected. If image is not detected then this memory region is unknown.
So do not unconditionally clear it.

Signed-off-by: Pali Rohár <pali@kernel.org>

diff --git a/board/nokia/rx51/lowlevel_init.S b/board/nokia/rx51/lowlevel_init.S
index 53697fd..1cf8f8d 100644 (file)
--- a/board/nokia/rx51/lowlevel_init.S
+++ b/board/nokia/rx51/lowlevel_init.S
@@ -76,7 +76,7 @@ save_boot_params:
        ldr     r4, [r0, #36]   /* r4 - 4 bytes header of kernel at offset 36 */
        ldr     r5, z_magic     /* r5 - LINUX_ARM_ZIMAGE_MAGIC */
        cmp     r4, r5
-       bne     copy_kernel_end /* skip if invalid image */
+       bne     skip_copy       /* skip if invalid image */
 
 copy_kernel_loop:
        ldmdb   r1!, {r3 - r10}
@@ -84,12 +84,12 @@ copy_kernel_loop:
        cmp     r1, r0
        bhi     copy_kernel_loop
 
-copy_kernel_end:
-
        /* remove header in source kernel image */
        mov     r5, #0
        str     r5, [r0]        /* remove 4 bytes header of kernel uImage */
        str     r5, [r0, #36]   /* remove 4 bytes header of kernel zImage */
 
+skip_copy:
+
        /* Returns */
        b       save_boot_params_ret