New cache.h file. Renames cp15_XYZ_cache() to arch_XYZ_cache() and addes L2 cache support if L2 cache is enabled
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Gregory Nutt
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191
arch/arm/src/armv7-a/cache.h
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arch/arm/src/armv7-a/cache.h
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/************************************************************************************
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* arch/arm/src/armv7-a/cache.h
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_ARMV7_A_CACHE_H
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#define __ARCH_ARM_SRC_ARMV7_A_CACHE_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include "cp15_cacheops.h"
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#include "l2cc.h"
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/************************************************************************************
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* Inline Functions
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************************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Name: arch_invalidate_dcache
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*
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* Description:
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* Invalidate the data cache within the specified region; we will be
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* performing a DMA operation in this region and we want to purge old data
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* in the cache.
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*
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* Input Parameters:
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* start - virtual start address of region
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* end - virtual end address of region + 1
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* This operation is not atomic. This function assumes that the caller
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* has exclusive access to the address range so that no harm is done if
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* the operation is pre-empted.
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*
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****************************************************************************/
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static inline void arch_invalidate_dcache(uintptr_t start, uintptr_t end)
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{
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cp15_invalidate_dcache(start, end);
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l2cc_invalidate(start, end);
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}
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/****************************************************************************
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* Name: arch_invalidate_dcache_all
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*
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* Description:
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* Invalidate the entire contents of D cache.
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*
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* NOTE: This function forces L1 and L2 cache operations to be atomic
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* by disabling interrupts.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static inline void arch_invalidate_dcache_all(void)
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{
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#ifdef CONFIG_ARMV7A_L2CC
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irqstate_t flags = irqsave();
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cp15_invalidate_dcache_all();
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l2cc_invalidate_all();
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irqrestore(flags);
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#else
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cp15_invalidate_dcache_all();
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#endif
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}
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/****************************************************************************
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* Name: arch_clean_dcache
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*
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* Description:
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* Clean the data cache within the specified region by flushing the
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* contents of the data cache to memory.
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*
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* Input Parameters:
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* start - virtual start address of region
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* end - virtual end address of region + 1
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* This operation is not atomic. This function assumes that the caller
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* has exclusive access to the address range so that no harm is done if
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* the operation is pre-empted.
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*
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****************************************************************************/
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static inline void arch_clean_dcache(uintptr_t start, uintptr_t end)
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{
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cp15_clean_dcache(start, end);
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l2cc_clean(start, end);
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}
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/****************************************************************************
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* Name: arch_flush_dcache
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*
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* Description:
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* Flush the data cache within the specified region by cleaning and
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* invalidating the D cache.
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*
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* Input Parameters:
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* start - virtual start address of region
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* end - virtual end address of region + 1
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* This operation is not atomic. This function assumes that the caller
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* has exclusive access to the address range so that no harm is done if
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* the operation is pre-empted.
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*
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****************************************************************************/
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static inline void arch_flush_dcache(uintptr_t start, uintptr_t end)
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{
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cp15_flush_dcache(start, end);
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l2cc_flush(start, end);
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}
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_ARMV7_A_CACHE_H */
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