aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/mm/pmb-fixed.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/mm/pmb-fixed.c')
-rw-r--r--arch/sh/mm/pmb-fixed.c45
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 00000000000..43c8eac4d8a
--- /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);