Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
arch/ia64/xen/xenpal.S | 76 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 76 insertions(+), 0 deletions(-)
create mode 100644 arch/ia64/xen/xenpal.S
diff --git a/arch/ia64/xen/xenpal.S b/arch/ia64/xen/xenpal.S
new file mode 100644
index 0000000..0e05210
--- /dev/null
+++ b/arch/ia64/xen/xenpal.S
@@ -0,0 +1,76 @@
+/*
+ * ia64/xen/xenpal.S
+ *
+ * Alternate PAL routines for Xen. Heavily leveraged from
+ * ia64/kernel/pal.S
+ *
+ * Copyright (C) 2005 Hewlett-Packard Co
+ * Dan Magenheimer <dan.magenheimer@.hp.com>
+ */
+
+#include <asm/asmmacro.h>
+#include <asm/processor.h>
+#include <asm/paravirt_nop.h>
+
+GLOBAL_ENTRY(xen_pal_call_static)
+#ifdef CONFIG_XEN
+ BR_IF_NATIVE(native_pal_call_static, r22, p7)
+#endif
+ .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
+ alloc loc1 = ar.pfs,4,5,0,0
+ movl loc2 = pal_entry_point
+1: {
+ mov r28 = in0
+ mov r29 = in1
+ mov r8 = ip
+ }
+ ;;
+ ld8 loc2 = [loc2] // loc2 <- entry point
+ adds r8 = 1f-1b,r8
+ mov loc4=ar.rsc // save RSE configuration
+ ;;
+ mov ar.rsc=0 // put RSE in enforced lazy, LE mode
+#ifdef CONFIG_XEN
+ mov r9 = r8
+ XEN_HYPER_GET_PSR
+ ;;
+ mov loc3 = r8
+ mov r8 = r9
+ ;;
+#else
+ mov loc3 = psr
+#endif
+ mov loc0 = rp
+ .body
+ mov r30 = in2
+
+#ifdef CONFIG_XEN
+ // this is low priority for paravirtualization, but is called
+ // from the idle loop so confuses privop counting
+ movl r31=XSI_PSR_I_ADDR
+ ;;
+ ld8 r31=[r31]
+ mov r22=1
+ ;;
+ st1 [r31]=r22
+ ;;
+ mov r31 = in3
+ mov b7 = loc2
+ ;;
+#else
+ mov r31 = in3
+ mov b7 = loc2
+
+(p7) rsm psr.i
+ ;;
+#endif
+ mov rp = r8
+ br.cond.sptk.many b7
+1: mov psr.l = loc3
+ mov ar.rsc = loc4 // restore RSE configuration
+ mov ar.pfs = loc1
+ mov rp = loc0
+ ;;
+ srlz.d // seralize restoration of psr.l
+ br.ret.sptk.many b0
+END(xen_pal_call_static)
--
1.5.3
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