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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/frv/mm/cache-page.c
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/frv/mm/cache-page.c')
-rw-r--r--arch/frv/mm/cache-page.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/frv/mm/cache-page.c b/arch/frv/mm/cache-page.c
new file mode 100644
index 00000000000..b24ade27a0f
--- /dev/null
+++ b/arch/frv/mm/cache-page.c
@@ -0,0 +1,71 @@
+/* cache-page.c: whole-page cache wrangling functions for MMU linux
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/module.h>
+#include <asm/pgalloc.h>
+
+/*****************************************************************************/
+/*
+ * DCF takes a virtual address and the page may not currently have one
+ * - temporarily hijack a kmap_atomic() slot and attach the page to it
+ */
+void flush_dcache_page(struct page *page)
+{
+ unsigned long dampr2;
+ void *vaddr;
+
+ dampr2 = __get_DAMPR(2);
+
+ vaddr = kmap_atomic_primary(page, __KM_CACHE);
+
+ frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE);
+
+ kunmap_atomic_primary(vaddr, __KM_CACHE);
+
+ if (dampr2) {
+ __set_DAMPR(2, dampr2);
+ __set_IAMPR(2, dampr2);
+ }
+
+} /* end flush_dcache_page() */
+
+EXPORT_SYMBOL(flush_dcache_page);
+
+/*****************************************************************************/
+/*
+ * ICI takes a virtual address and the page may not currently have one
+ * - so we temporarily attach the page to a bit of virtual space so that is can be flushed
+ */
+void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
+ unsigned long start, unsigned long len)
+{
+ unsigned long dampr2;
+ void *vaddr;
+
+ dampr2 = __get_DAMPR(2);
+
+ vaddr = kmap_atomic_primary(page, __KM_CACHE);
+
+ start = (start & ~PAGE_MASK) | (unsigned long) vaddr;
+ frv_cache_wback_inv(start, start + len);
+
+ kunmap_atomic_primary(vaddr, __KM_CACHE);
+
+ if (dampr2) {
+ __set_DAMPR(2, dampr2);
+ __set_IAMPR(2, dampr2);
+ }
+
+} /* end flush_icache_user_range() */
+
+EXPORT_SYMBOL(flush_icache_user_range);