New cache.h file. Renames cp15_XYZ_cache() to arch_XYZ_cache() and addes L2 cache support if L2 cache is enabled

1 files changed, 191 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/armv7-a/cache.h b/nuttx/arch/arm/src/armv7-a/cache.h
new file mode 100644
index 000000000..52bcd1040
--- /dev/null
+++ b/nuttx/arch/arm/src/armv7-a/cache.h
@@ -0,0 +1,191 @@
+/************************************************************************************
+ * arch/arm/src/armv7-a/cache.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_ARMV7_A_CACHE_H
+#define __ARCH_ARM_SRC_ARMV7_A_CACHE_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "cp15_cacheops.h"
+#include "l2cc.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+ /************************************************************************************
+ * Inline Functions
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Name: arch_invalidate_dcache
+ *
+ * Description:
+ *   Invalidate the data cache within the specified region; we will be
+ *   performing a DMA operation in this region and we want to purge old data
+ *   in the cache.
+ *
+ * Input Parameters:
+ *   start - virtual start address of region
+ *   end   - virtual end address of region + 1
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   This operation is not atomic.  This function assumes that the caller
+ *   has exclusive access to the address range so that no harm is done if
+ *   the operation is pre-empted.
+ *
+ ****************************************************************************/
+
+static inline void arch_invalidate_dcache(uintptr_t start, uintptr_t end)
+{
+  cp15_invalidate_dcache(start, end);
+  l2cc_invalidate(start, end);
+}
+
+/****************************************************************************
+ * Name: arch_invalidate_dcache_all
+ *
+ * Description:
+ *   Invalidate the entire contents of D cache.
+ *
+ *   NOTE: This function forces L1 and L2 cache operations to be atomic
+ *   by disabling interrupts.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+static inline void arch_invalidate_dcache_all(void)
+{
+#ifdef CONFIG_ARMV7A_L2CC
+  irqstate_t flags = irqsave();
+  cp15_invalidate_dcache_all();
+  l2cc_invalidate_all();
+  irqrestore(flags);
+#else
+  cp15_invalidate_dcache_all();
+#endif
+}
+
+/****************************************************************************
+ * Name: arch_clean_dcache
+ *
+ * Description:
+ *   Clean the data cache within the specified region by flushing the
+ *   contents of the data cache to memory.
+ *
+ * Input Parameters:
+ *   start - virtual start address of region
+ *   end   - virtual end address of region + 1
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   This operation is not atomic.  This function assumes that the caller
+ *   has exclusive access to the address range so that no harm is done if
+ *   the operation is pre-empted.
+ *
+ ****************************************************************************/
+
+static inline void arch_clean_dcache(uintptr_t start, uintptr_t end)
+{
+  cp15_clean_dcache(start, end);
+  l2cc_clean(start, end);
+}
+
+/****************************************************************************
+ * Name: arch_flush_dcache
+ *
+ * Description:
+ *   Flush the data cache within the specified region by cleaning and
+ *   invalidating the D cache.
+ *
+ * Input Parameters:
+ *   start - virtual start address of region
+ *   end   - virtual end address of region + 1
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   This operation is not atomic.  This function assumes that the caller
+ *   has exclusive access to the address range so that no harm is done if
+ *   the operation is pre-empted.
+ *
+ ****************************************************************************/
+
+static inline void arch_flush_dcache(uintptr_t start, uintptr_t end)
+{
+  cp15_flush_dcache(start, end);
+  l2cc_flush(start, end);
+}
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+#endif /* __ASSEMBLY__ */
+
+#endif  /* __ARCH_ARM_SRC_ARMV7_A_CACHE_H */