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authorZou Nan hai <nanhai.zou@intel.com>2006-09-14 08:25:15 +0800
committerTony Luck <tony.luck@intel.com>2006-09-26 14:13:03 -0700
commitf5a3f3dc189485d607fbd42678cc23958acc0a6e (patch)
tree7896c4c57d99011129af4ebfc8e3c24ca460cd1a
parent5c55cd63a77a85f603c98c2171a8054ca34b6a9f (diff)
[IA64] Make gp value point to Region 5 in mca handler
MCA dispatch code take physical address of GP passed from SAL, then call DATA_PA_TO_VA twice on GP before call into C code. The first time is in ia64_set_kernel_register, the second time is in VIRTUAL_MODE_ENTER. The gp is changed to a virtual address in region 7 because DATA_PA_TO_VA is implemented by dep instruction. However when notify blocks were called from MCA handler code, because notify blocks are supported by callback function pointers, gp value value was switched to region 5 again. The patch set gp register to kernel gp of region 5 at entry of MCA dispatch. Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r--arch/ia64/kernel/mca_asm.S5
-rw-r--r--include/asm-ia64/mca_asm.h2
2 files changed, 1 insertions, 6 deletions
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index 96047491d1b..ee3ff76c8a3 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -1025,18 +1025,13 @@ ia64_old_stack:
ia64_set_kernel_registers:
add temp3=MCA_SP_OFFSET, r3
- add temp4=MCA_SOS_OFFSET+SOS(OS_GP), r3
mov b0=r2 // save return address
GET_IA64_MCA_DATA(temp1)
;;
- add temp4=temp4, temp1 // &struct ia64_sal_os_state.os_gp
add r12=temp1, temp3 // kernel stack pointer on MCA/INIT stack
add r13=temp1, r3 // set current to start of MCA/INIT stack
add r20=temp1, r3 // physical start of MCA/INIT stack
;;
- ld8 r1=[temp4] // OS GP from SAL OS state
- ;;
- DATA_PA_TO_VA(r1,temp1)
DATA_PA_TO_VA(r12,temp2)
DATA_PA_TO_VA(r13,temp3)
;;
diff --git a/include/asm-ia64/mca_asm.h b/include/asm-ia64/mca_asm.h
index 27c9203d8ce..76203f9a871 100644
--- a/include/asm-ia64/mca_asm.h
+++ b/include/asm-ia64/mca_asm.h
@@ -197,9 +197,9 @@
movl temp2 = start_addr; \
;; \
mov cr.iip = temp2; \
+ movl gp = __gp \
;; \
DATA_PA_TO_VA(sp, temp1); \
- DATA_PA_TO_VA(gp, temp2); \
srlz.i; \
;; \
nop 1; \