1 files changed, 100 insertions, 0 deletions

diff --git a/arch/sh/mm/cache-sh3.c b/arch/sh/mm/cache-sh3.c
new file mode 100644
index 000000000000..838731fc608d
--- /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")));