1 files changed, 45 insertions, 0 deletions

diff --git a/arch/sh/mm/pmb-fixed.c b/arch/sh/mm/pmb-fixed.c
new file mode 100644
index 000000000000..43c8eac4d8a1
--- /dev/null
+++ b/arch/sh/mm/pmb-fixed.c
@@ -0,0 +1,45 @@
+/*
+ * arch/sh/mm/fixed_pmb.c
+ *
+ * Copyright (C) 2009  Renesas Solutions Corp.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+#include <asm/mmu.h>
+#include <asm/mmu_context.h>
+
+static int __uses_jump_to_uncached fixed_pmb_init(void)
+{
+        int i;
+        unsigned long addr, data;
+
+        jump_to_uncached();
+
+        for (i = 0; i < PMB_ENTRY_MAX; i++) {
+                addr = PMB_DATA + (i << PMB_E_SHIFT);
+                data = ctrl_inl(addr);
+                if (!(data & PMB_V))
+                        continue;
+
+                if (data & PMB_C) {
+#if defined(CONFIG_CACHE_WRITETHROUGH)
+                        data |= PMB_WT;
+#elif defined(CONFIG_CACHE_WRITEBACK)
+                        data &= ~PMB_WT;
+#else
+                        data &= ~(PMB_C | PMB_WT);
+#endif
+                }
+                ctrl_outl(data, addr);
+        }
+
+        back_to_cached();
+
+        return 0;
+}
+arch_initcall(fixed_pmb_init);