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| author | Michal Simek <michal.simek@xilinx.com> | 2015-01-27 15:10:37 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2015-02-09 15:12:46 +0100 |
| commit | 7c4dd542551dc146b6e3da0c1b519d95dd124d6c (patch) | |
| tree | eb2d7e178d63b5af6765a13b6294afb065d55830 /arch/microblaze/cpu | |
| parent | e945f6dc2814f5f0d30b5b7e23821b3fd4faff5b (diff) | |
| download | u-boot-imx-7c4dd542551dc146b6e3da0c1b519d95dd124d6c.zip u-boot-imx-7c4dd542551dc146b6e3da0c1b519d95dd124d6c.tar.gz u-boot-imx-7c4dd542551dc146b6e3da0c1b519d95dd124d6c.tar.bz2 | |
microblaze: Speedup code copy
Remove one instruction in the loop which speedup
code copying.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/microblaze/cpu')
| -rw-r--r-- | arch/microblaze/cpu/start.S | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S index 3de0e12..4023ec0 100644 --- 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 */ |