1 files changed, 149 insertions, 0 deletions

diff --git a/kernel/arch/arm/include/asm/outercache.h b/kernel/arch/arm/include/asm/outercache.h
new file mode 100644
index 000000000..563b92fc2
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+++ b/kernel/arch/arm/include/asm/outercache.h
@@ -0,0 +1,149 @@
+/*
+ * arch/arm/include/asm/outercache.h
+ *
+ * Copyright (C) 2010 ARM Ltd.
+ * Written by Catalin Marinas <catalin.marinas@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __ASM_OUTERCACHE_H
+#define __ASM_OUTERCACHE_H
+
+#include <linux/types.h>
+
+struct l2x0_regs;
+
+struct outer_cache_fns {
+	void (*inv_range)(unsigned long, unsigned long);
+	void (*clean_range)(unsigned long, unsigned long);
+	void (*flush_range)(unsigned long, unsigned long);
+	void (*flush_all)(void);
+	void (*disable)(void);
+#ifdef CONFIG_OUTER_CACHE_SYNC
+	void (*sync)(void);
+#endif
+	void (*resume)(void);
+
+	/* This is an ARM L2C thing */
+	void (*write_sec)(unsigned long, unsigned);
+	void (*configure)(const struct l2x0_regs *);
+};
+
+extern struct outer_cache_fns outer_cache;
+
+#ifdef CONFIG_OUTER_CACHE
+/**
+ * outer_inv_range - invalidate range of outer cache lines
+ * @start: starting physical address, inclusive
+ * @end: end physical address, exclusive
+ */
+static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
+{
+	if (outer_cache.inv_range)
+		outer_cache.inv_range(start, end);
+}
+
+/**
+ * outer_clean_range - clean dirty outer cache lines
+ * @start: starting physical address, inclusive
+ * @end: end physical address, exclusive
+ */
+static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
+{
+	if (outer_cache.clean_range)
+		outer_cache.clean_range(start, end);
+}
+
+/**
+ * outer_flush_range - clean and invalidate outer cache lines
+ * @start: starting physical address, inclusive
+ * @end: end physical address, exclusive
+ */
+static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
+{
+	if (outer_cache.flush_range)
+		outer_cache.flush_range(start, end);
+}
+
+/**
+ * outer_flush_all - clean and invalidate all cache lines in the outer cache
+ *
+ * Note: depending on implementation, this may not be atomic - it must
+ * only be called with interrupts disabled and no other active outer
+ * cache masters.
+ *
+ * It is intended that this function is only used by implementations
+ * needing to override the outer_cache.disable() method due to security.
+ * (Some implementations perform this as a clean followed by an invalidate.)
+ */
+static inline void outer_flush_all(void)
+{
+	if (outer_cache.flush_all)
+		outer_cache.flush_all();
+}
+
+/**
+ * outer_disable - clean, invalidate and disable the outer cache
+ *
+ * Disable the outer cache, ensuring that any data contained in the outer
+ * cache is pushed out to lower levels of system memory.  The note and
+ * conditions above concerning outer_flush_all() applies here.
+ */
+extern void outer_disable(void);
+
+/**
+ * outer_resume - restore the cache configuration and re-enable outer cache
+ *
+ * Restore any configuration that the cache had when previously enabled,
+ * and re-enable the outer cache.
+ */
+static inline void outer_resume(void)
+{
+	if (outer_cache.resume)
+		outer_cache.resume();
+}
+
+#else
+
+static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
+{ }
+static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
+{ }
+static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
+{ }
+static inline void outer_flush_all(void) { }
+static inline void outer_disable(void) { }
+static inline void outer_resume(void) { }
+
+#endif
+
+#ifdef CONFIG_OUTER_CACHE_SYNC
+/**
+ * outer_sync - perform a sync point for outer cache
+ *
+ * Ensure that all outer cache operations are complete and any store
+ * buffers are drained.
+ */
+static inline void outer_sync(void)
+{
+	if (outer_cache.sync)
+		outer_cache.sync();
+}
+#else
+static inline void outer_sync(void)
+{ }
+#endif
+
+#endif	/* __ASM_OUTERCACHE_H */