microblaze: Speedup code copy

Remove one instruction in the loop which speedup
code copying.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S
index 3de0e12090ead876b75a509359aa7ee7f5e4fb69..4023ec067531474207cf5d4432b84d669348c89e 100644 (file)
--- a/arch/microblaze/cpu/start.S
+++ b/arch/microblaze/cpu/start.S
@@ -212,12 +212,14 @@ relocate_code:
        /* Relocate text and data - r12 temp value */
        addi    r21, r0, _start
        addi    r22, r0, __end - 4 /* Include BSS too */
-1:     lwi     r12, r21, 0 /* Load u-boot data */
-       swi     r12, r23, 0 /* Write zero to loc */
-       addi    r21, r21, 4 /* Increment to next loc - origin code */
-       cmp     r12, r21, r22 /* Check if we have reach the end */
+
+       rsub    r6, r21, r22
+       or      r5, r0, r0
+1:     lw      r12, r21, r5 /* Load u-boot data */
+       sw      r12, r23, r5 /* Write zero to loc */
+       cmp     r12, r5, r6 /* Check if we have reach the end */
        bneid   r12, 1b
-       addi    r23, r23, 4 /* Increment to next loc - relocate code */
+       addi    r5, r5, 4 /* Increment to next loc - relocate code */
 
        /* R23 points to the base address. */
        add     r23, r0, r7 /* Move reloc addr to r23 */