x20090325-1554

1 files changed, 27 insertions, 0 deletions

diff --git a/emu/Linux/segflush-power.c b/emu/Linux/segflush-power.c
new file mode 100644
index 00000000..07f9a3cb
--- /dev/null
+++ b/emu/Linux/segflush-power.c
@@ -0,0 +1,27 @@
+/*
+ * from geoff collyer's port
+ * invalidate instruction cache and write back data cache from a to a+n-1,
+ * at least.
+ */
+void
+segflush(void *a, ulong n)
+{
+    ulong *p;
+
+    // cache blocks are often eight words (32 bytes) long, sometimes 16 bytes.
+    // need to determine it dynamically?
+    for (p = (ulong *)((ulong)a & ~3UL); (char *)p < (char *)a + n; p++)
+        __asm__("dcbst	0,%0\n\t"	// not dcbf, which writes back, then invalidates
+            "icbi	0,%0\n\t"
+            : // no output
+            : "ar" (p)
+            );
+     __asm__("sync\n\t"
+            : // no output
+            :
+            );
+   __asm__("isync\n\t"
+            : // no output
+            :
+            );
+}