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authorKeith Owens <kaos@sgi.com>2005-09-22 18:49:15 +1000
committerTony Luck <tony.luck@intel.com>2005-09-22 13:24:19 -0700
commit20bb86852a6b7d9ca8c48ff921ff3904038959cf (patch)
tree7db40dee86256b322a1036a6187db2e189e0bd0a /include/asm-ia64
parent83a78d9ba792660418d692fd6737871aefdbff36 (diff)
downloadop-kernel-dev-20bb86852a6b7d9ca8c48ff921ff3904038959cf.zip
op-kernel-dev-20bb86852a6b7d9ca8c48ff921ff3904038959cf.tar.gz
[IA64] Wire in the MCA/INIT handler stacks
Wire the MCA/INIT handler stacks into DTR[2] and track them in IA64_KR(CURRENT_STACK). This gives the MCA/INIT handler stacks the same TLB status as normal kernel stacks. Reload the old CURRENT_STACK data on return from OS to SAL. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64')
-rw-r--r--include/asm-ia64/mca.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-ia64/mca.h b/include/asm-ia64/mca.h
index 97a28b8..c7d9c9e 100644
--- a/include/asm-ia64/mca.h
+++ b/include/asm-ia64/mca.h
@@ -80,7 +80,12 @@ struct ia64_sal_os_state {
u64 sal_ra; /* Return address in SAL, physical */
u64 sal_gp; /* GP of the SAL - physical */
pal_min_state_area_t *pal_min_state; /* from R17. physical in asm, virtual in C */
+ /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK).
+ * Note: if the MCA/INIT recovery code wants to resume to a new context
+ * then it must change these values to reflect the new kernel stack.
+ */
u64 prev_IA64_KR_CURRENT; /* previous value of IA64_KR(CURRENT) */
+ u64 prev_IA64_KR_CURRENT_STACK;
struct task_struct *prev_task; /* previous task, NULL if it is not useful */
/* Some interrupt registers are not saved in minstate, pt_regs or
* switch_stack. Because MCA/INIT can occur when interrupts are
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