With LOADADDR set to 0x80000000, except_vec0_r4600 and
except_vec0_nevada are overwritten in trap_init() before they
get installed at KSEG0.
The fix is easy:
diff -u -r1.53 traps.c
--- arch/mips/kernel/traps.c 2001/04/08 13:24:27 1.53
+++ arch/mips/kernel/traps.c 2001/05/15 21:39:56
@@ -837,7 +837,9 @@
* Copy the EJTAG debug exception vector handler code to it's
final
* destination.
*/
+#ifdef WHONEEDSTLB
memcpy((void *)(KSEG0 + 0x300), &except_vec_ejtag_debug, 0x80);
+#endif
/*
* Only some CPUs have the watch exceptions or a dedicated
OK, a kinder fix would be something like:
diff -u -r1.25 head.S
--- arch/mips/kernel/head.S 2001/05/04 20:43:25 1.25
+++ arch/mips/kernel/head.S 2001/05/15 21:39:40
@@ -44,7 +44,7 @@
* FIXME: Use the initcode feature to get rid of unused handler
* variants.
*/
- .fill 0x280
+ .fill 0x380
/*
* This is space for the interrupt handlers.
* After trap_init() they are located at virtual address KSEG0.
I wonder why this never hit anybody else ...
Regards,
Tommy Christensen
