Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/sh/mm/cache-sh2.c b/arch/sh/mm/cache-sh2.c
new file mode 100644
index 0000000..2689cb2
--- /dev/null
+++ b/arch/sh/mm/cache-sh2.c
@@ -0,0 +1,50 @@
+/*
+ * arch/sh/mm/cache-sh2.c
+ *
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/init.h>
+#include <linux/mm.h>
+
+#include <asm/cache.h>
+#include <asm/addrspace.h>
+#include <asm/processor.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+
+/*
+ * Calculate the OC address and set the way bit on the SH-2.
+ *
+ * We must have already jump_to_P2()'ed prior to calling this
+ * function, since we rely on CCR manipulation to do the
+ * Right Thing(tm).
+ */
+unsigned long __get_oc_addr(unsigned long set, unsigned long way)
+{
+	unsigned long ccr;
+
+	/*
+	 * On SH-2 the way bit isn't tracked in the address field
+	 * if we're doing address array access .. instead, we need
+	 * to manually switch out the way in the CCR.
+	 */
+	ccr = ctrl_inl(CCR);
+	ccr &= ~0x00c0;
+	ccr |= way << cpu_data->dcache.way_shift;
+
+	/*
+	 * Despite the number of sets being halved, we end up losing
+	 * the first 2 ways to OCRAM instead of the last 2 (if we're
+	 * 4-way). As a result, forcibly setting the W1 bit handily
+	 * bumps us up 2 ways.
+	 */
+	if (ccr & CCR_CACHE_ORA)
+		ccr |= 1 << (cpu_data->dcache.way_shift + 1);
+
+	ctrl_outl(ccr, CCR);
+
+	return CACHE_OC_ADDRESS_ARRAY | (set << cpu_data->dcache.entry_shift);
+}
+