Hi, Isaku
Signed-off-by: Isaku Yamahata [EMAIL PROTECTED]
---
arch/ia64/xen/xenminstate.h | 148
+++
1 files changed, 148 insertions(+), 0 deletions(-)
create mode 100644 arch/ia64/xen/xenminstate.h
diff --git a/arch/ia64/xen/xenminstate.h b/arch/ia64/xen/xenminstate.h
new file mode 100644
index 000..cdaf910
--- /dev/null
+++ b/arch/ia64/xen/xenminstate.h
@@ -0,0 +1,148 @@
+#include asm/cache.h
+
+#ifdef CONFIG_XEN
+#include ../kernel/entry.h
+#else
+#include entry.h
+#endif
+
+#ifdef __IA64_ASM_PARAVIRTUALIZED_XEN
+/*
+ * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
+ * the minimum state necessary that allows us to turn psr.ic back
+ * on.
+ *
+ * Assumed state upon entry:
+ *psr.ic: off
+ *r31:contains saved predicates (pr)
+ *
+ * Upon exit, the state is as follows:
+ *psr.ic: off
+ * r2 = points to pt_regs.r16
+ * r8 = contents of ar.ccv
+ * r9 = contents of ar.csd
+ *r10 = contents of ar.ssd
+ *r11 = FPSR_DEFAULT
+ *r12 = kernel sp (kernel virtual address)
+ *r13 = points to current task_struct (kernel virtual address)
+ *p15 = TRUE if psr.i is set in cr.ipsr
+ *predicate registers (other than p2, p3, and p15), b6, r3, r14, r15:
+ *preserved
+ * CONFIG_XEN note: p6/p7 are not preserved
+ *
+ * Note that psr.ic is NOT turned on by this macro. This is so that
+ * we can pass interruption state as arguments to a handler.
+ */
+#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)
\
+ mov r16=IA64_KR(CURRENT); /* M */
\
+ mov r27=ar.rsc; /* M */
\
+ mov r20=r1; /* A */
\
+ mov r25=ar.unat;/* M */
\
+ /* mov r29=cr.ipsr; /* M */
\
+ movl r29=XSI_IPSR;;
\
+ ld8 r29=[r29];;
\
+ mov r26=ar.pfs; /* I */
\
+ /* mov r28=cr.iip; /* M */
\
+ movl r28=XSI_IIP;;
\
+ ld8 r28=[r28];;
\
+ mov r21=ar.fpsr;/* M */
\
+ COVER; /* B;; (or nothing) */
\
We may mis-read the above COVER as COVER in arch/ia64/xen/inst_xen.h.
Why don't chage the name?
Best Regards,
Akio Takebe
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