From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: 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!
---
 arch/sh/mm/cache-sh3.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 arch/sh/mm/cache-sh3.c

(limited to 'arch/sh/mm/cache-sh3.c')

diff --git a/arch/sh/mm/cache-sh3.c b/arch/sh/mm/cache-sh3.c
new file mode 100644
index 00000000000..838731fc608
--- /dev/null
+++ b/arch/sh/mm/cache-sh3.c
@@ -0,0 +1,100 @@
+/*
+ * arch/sh/mm/cache-sh3.c
+ *
+ * Copyright (C) 1999, 2000  Niibe Yutaka
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <linux/init.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/threads.h>
+#include <asm/addrspace.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+/*
+ * Write back the dirty D-caches, but not invalidate them.
+ *
+ * Is this really worth it, or should we just alias this routine
+ * to __flush_purge_region too?
+ *
+ * START: Virtual Address (U0, P1, or P3)
+ * SIZE: Size of the region.
+ */
+
+void __flush_wback_region(void *start, int size)
+{
+	unsigned long v, j;
+	unsigned long begin, end;
+	unsigned long flags;
+
+	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
+	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
+		& ~(L1_CACHE_BYTES-1);
+
+	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
+		unsigned long addrstart = CACHE_OC_ADDRESS_ARRAY;
+		for (j = 0; j < cpu_data->dcache.ways; j++) {
+			unsigned long data, addr, p;
+
+			p = __pa(v);
+			addr = addrstart | (v & cpu_data->dcache.entry_mask);
+			local_irq_save(flags);
+			data = ctrl_inl(addr);
+
+			if ((data & CACHE_PHYSADDR_MASK) ==
+			    (p & CACHE_PHYSADDR_MASK)) {
+				data &= ~SH_CACHE_UPDATED;
+				ctrl_outl(data, addr);
+				local_irq_restore(flags);
+				break;
+			}
+			local_irq_restore(flags);
+			addrstart += cpu_data->dcache.way_incr;
+		}
+	}
+}
+
+/*
+ * Write back the dirty D-caches and invalidate them.
+ *
+ * START: Virtual Address (U0, P1, or P3)
+ * SIZE: Size of the region.
+ */
+void __flush_purge_region(void *start, int size)
+{
+	unsigned long v;
+	unsigned long begin, end;
+
+	begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
+	end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
+		& ~(L1_CACHE_BYTES-1);
+
+	for (v = begin; v < end; v+=L1_CACHE_BYTES) {
+		unsigned long data, addr;
+
+		data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */
+		addr = CACHE_OC_ADDRESS_ARRAY |
+			(v & cpu_data->dcache.entry_mask) | SH_CACHE_ASSOC;
+		ctrl_outl(data, addr);
+	}
+}
+
+/*
+ * No write back please
+ *
+ * Except I don't think there's any way to avoid the writeback. So we
+ * just alias it to __flush_purge_region(). dwmw2.
+ */
+void __flush_invalidate_region(void *start, int size)
+	__attribute__((alias("__flush_purge_region")));
-- 
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