aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/lib/flush.S
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ia64/lib/flush.S
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/ia64/lib/flush.S')
-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 00000000000..29c802b1966
--- /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)