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add missing patch to arch/mips/kernel/traps.c to allow ar7 to setup its handler correctly (#6722) 

SVN-Revision: 19812
This commit is contained in:
Florian Fainelli 2010-02-22 09:43:37 +00:00
parent 243e190675
commit 9067ed7609
1 changed files with 28 additions and 0 deletions
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28
target/linux/ar7/patches-2.6.32/100-board_support.patch Normal file
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@ -0,0 +1,28 @@
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1256,9 +1256,22 @@ void *set_except_vector(int n, void *add
exception_handlers[n] = handler;
if (n == 0 && cpu_has_divec) {
- *(u32 *)(ebase + 0x200) = 0x08000000 |
- (0x03ffffff & (handler >> 2));
- local_flush_icache_range(ebase + 0x200, ebase + 0x204);
+ if ((handler ^ (ebase + 4)) & 0xfc000000) {
+ /* lui k0, 0x0000 */
+ *(u32 *)(ebase + 0x200) = 0x3c1a0000 | (handler >> 16);
+ /* ori k0, 0x0000 */
+ *(u32 *)(ebase + 0x204) =
+ 0x375a0000 | (handler & 0xffff);
+ /* jr k0 */
+ *(u32 *)(ebase + 0x208) = 0x03400008;
+ /* nop */
+ *(u32 *)(ebase + 0x20C) = 0x00000000;
+ flush_icache_range(ebase + 0x200, ebase + 0x210);
+ } else {
+ *(u32 *)(ebase + 0x200) =
+ 0x08000000 | (0x03ffffff & (handler >> 2));
+ flush_icache_range(ebase + 0x200, ebase + 0x204);
+ }
}
return (void *)old_handler;
}