Moving the interrupt vectors to low memory can cause issues if the code
gets overwritten via some image loading command (tftp, boot*, etc.) and
interrupts (like the decrementer are enabled).
On 85xx there is no reason to copy the interrupt vectors to low memory
since we can run them in high memory since we are a Book-E core.
Signed-off-by: Kumar Gala <[EMAIL PROTECTED]>
---
This is a fix for 1.3.4.
- k
cpu/mpc85xx/start.S | 19 +++++--------------
1 files changed, 5 insertions(+), 14 deletions(-)
diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S
index 10fe936..9c8b2a1 100644
--- a/cpu/mpc85xx/start.S
+++ b/cpu/mpc85xx/start.S
@@ -936,13 +936,6 @@ trap_init:
bgelr /* return if r7>=r8 - just in case */
mflr r4 /* save link register */
-1:
- lwz r0,0(r7)
- stw r0,0(r9)
- addi r7,r7,4
- addi r9,r9,4
- cmplw 0,r7,r8
- bne 1b
/*
* relocate `hdlr' and `int_return' entries
@@ -973,9 +966,6 @@ trap_init:
cmplw 0,r7,r8
blt 2b
- lis r7,0x0
- mtspr IVPR,r7
-
mtlr r4 /* restore link register */
blr
@@ -983,13 +973,14 @@ trap_init:
* Function: relocate entries for one exception vector
*/
trap_reloc:
- lwz r0,0(r7) /* hdlr ... */
+ lwzx r0,r3,r7 /* hdlr ... */
add r0,r0,r3 /* ... += dest_addr */
- stw r0,0(r7)
+ stwx r0,r3,r7
- lwz r0,4(r7) /* int_return ... */
+ addi r7,r7,4
+ lwzx r0,r3,r7 /* int_return ... */
add r0,r0,r3 /* ... += dest_addr */
- stw r0,4(r7)
+ stwx r0,r3,r7
blr
--
1.5.5.1
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