Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sh / mm / cache-sh2.c

diff --git a/kernel/arch/sh/mm/cache-sh2.c b/kernel/arch/sh/mm/cache-sh2.c
new file mode 100644 (file)
index 0000000..a74259f
--- /dev/null
+++ b/kernel/arch/sh/mm/cache-sh2.c
@@ -0,0 +1,91 @@
+/*
+ * arch/sh/mm/cache-sh2.c
+ *
+ * Copyright (C) 2002 Paul Mundt
+ * Copyright (C) 2008 Yoshinori Sato
+ *
+ * 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>
+
+static void sh2__flush_wback_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 addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0);
+               int way;
+               for (way = 0; way < 4; way++) {
+                       unsigned long data =  __raw_readl(addr | (way << 12));
+                       if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
+                               data &= ~SH_CACHE_UPDATED;
+                               __raw_writel(data, addr | (way << 12));
+                       }
+               }
+       }
+}
+
+static void sh2__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)
+               __raw_writel((v & CACHE_PHYSADDR_MASK),
+                         CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
+}
+
+static void sh2__flush_invalidate_region(void *start, int size)
+{
+#ifdef CONFIG_CACHE_WRITEBACK
+       /*
+        * SH-2 does not support individual line invalidation, only a
+        * global invalidate.
+        */
+       unsigned long ccr;
+       unsigned long flags;
+       local_irq_save(flags);
+       jump_to_uncached();
+
+       ccr = __raw_readl(SH_CCR);
+       ccr |= CCR_CACHE_INVALIDATE;
+       __raw_writel(ccr, SH_CCR);
+
+       back_to_cached();
+       local_irq_restore(flags);
+#else
+       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)
+               __raw_writel((v & CACHE_PHYSADDR_MASK),
+                         CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
+#endif
+}
+
+void __init sh2_cache_init(void)
+{
+       __flush_wback_region            = sh2__flush_wback_region;
+       __flush_purge_region            = sh2__flush_purge_region;
+       __flush_invalidate_region       = sh2__flush_invalidate_region;
+}