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microblaze: start.S: use stack space as scratch memory for endian offset
author
Ovidiu Panait
<ovidiu.panait@windriver.com>
Tue, 30 Nov 2021 16:33:52 +0000
(18:33 +0200)
committer
Michal Simek
<michal.simek@xilinx.com>
Wed, 5 Jan 2022 09:22:03 +0000
(10:22 +0100)
To simpify the code, use stack space as scratch memory for endian offset
calculation, rather than saving/restoring the first unused MB vector.
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Link:
https://lore.kernel.org/r/20211130163358.2531677-5-ovidiu.panait@windriver.com
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
arch/microblaze/cpu/start.S
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diff --git
a/arch/microblaze/cpu/start.S
b/arch/microblaze/cpu/start.S
index 463e0feba47e87f2d02acf7ee3f15cfcd0db3d34..a1c06108d72332ee2e4866ab7603642926fb19e6 100644
(file)
--- a/
arch/microblaze/cpu/start.S
+++ b/
arch/microblaze/cpu/start.S
@@
-125,10
+125,8
@@
__setup_exceptions:
* 4b) BIG endian - r10 contains 0x0 because 0x2 offset is on addr 0x3
*/
addik r6, r0, 0x2 /* BIG/LITTLE endian offset */
- lwi r7, r0, 0x28
- swi r6, r0, 0x28 /* used first unused MB vector */
- lbui r10, r0, 0x28 /* used first unused MB vector */
- swi r7, r0, 0x28
+ sw r6, r1, r0
+ lbu r10, r1, r0
/* add opcode instruction for 32bit jump - 2 instruction imm & brai */
addi r2, r0, 0xb0000000 /* hex b000 opcode imm */