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| author | Michal Simek <michal.simek@amd.com> | 2022-06-24 14:15:00 +0200 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2022-06-24 14:15:00 +0200 |
| commit | 3041b512ebed13e29144cf5b9524e714c4aa458e (patch) | |
| tree | a905c245a7fe3c51070b51c0032bc46f06ccf52e /arch | |
| parent | 532ad5f84163cdf010e0181e2f9c3fbb1eac88d6 (diff) | |
| download | u-boot-3041b512ebed13e29144cf5b9524e714c4aa458e.zip u-boot-3041b512ebed13e29144cf5b9524e714c4aa458e.tar.gz u-boot-3041b512ebed13e29144cf5b9524e714c4aa458e.tar.bz2 | |
microblaze: Optimize register usage in relocate_code
There are additional operations which can be done simpler that's why
improve logic around relocation address r7 handling and _start symbol.
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/c8b60f72f1605c2ba6b4b7be1893d7e6ec3d8597.1655299267.git.michal.simek@amd.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/cpu/start.S | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S index 2aae4a0..f2d6d12 100644 --- a/arch/microblaze/cpu/start.S +++ b/arch/microblaze/cpu/start.S @@ -271,7 +271,6 @@ relocate_code: mts rshr, r1 addi r31, r6, 0 /* Start to use new GD */ - add r23, r0, r7 /* Move reloc addr to r23 */ /* Relocate text and data - r12 temp value */ addi r21, r0, _start addi r22, r0, _end /* Include BSS too */ @@ -280,15 +279,13 @@ relocate_code: 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 */ + sw r12, r7, r5 /* Write zero to loc */ cmp r12, r5, r6 /* Check if we have reach the end */ bneid r12, 1b 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 */ - addi r24, r0, _start /* Get reloc offset */ - rsub r23, r24, r23 /* keep - this is already here gd->reloc_off */ + rsub r23, r21, r7 /* keep - this is already here gd->reloc_off */ /* Setup vectors with post-relocation symbols */ add r5, r0, r23 /* load gd->reloc_off to r5 */ |