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-rw-r--r--arch/ia64/lib/flush.S39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/ia64/lib/flush.S b/arch/ia64/lib/flush.S
new file mode 100644
index 000000000000..29c802b19669
--- /dev/null
+++ b/arch/ia64/lib/flush.S
@@ -0,0 +1,39 @@
+/*
+ * Cache flushing routines.
+ *
+ * Copyright (C) 1999-2001 Hewlett-Packard Co
+ * Copyright (C) 1999-2001 David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+#include <asm/asmmacro.h>
+#include <asm/page.h>
+
+ /*
+ * flush_icache_range(start,end)
+ * Must flush range from start to end-1 but nothing else (need to
+ * be careful not to touch addresses that may be unmapped).
+ */
+GLOBAL_ENTRY(flush_icache_range)
+ .prologue
+ alloc r2=ar.pfs,2,0,0,0
+ sub r8=in1,in0,1
+ ;;
+ shr.u r8=r8,5 // we flush 32 bytes per iteration
+ .save ar.lc, r3
+ mov r3=ar.lc // save ar.lc
+ ;;
+
+ .body
+
+ mov ar.lc=r8
+ ;;
+.Loop: fc in0 // issuable on M0 only
+ add in0=32,in0
+ br.cloop.sptk.few .Loop
+ ;;
+ sync.i
+ ;;
+ srlz.i
+ ;;
+ mov ar.lc=r3 // restore ar.lc
+ br.ret.sptk.many rp
+END(flush_icache_range)