f596768427
The trace output layer was using this transformation already, make it an official API. There are other places doing similar logic that can benefit. Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
|
|
* Copyright (c) 2019 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#ifndef __COMMON_ADSP_CACHE_H__
|
|
#define __COMMON_ADSP_CACHE_H__
|
|
|
|
#include <xtensa/hal.h>
|
|
|
|
/* macros for data cache operations */
|
|
#define SOC_DCACHE_FLUSH(addr, size) \
|
|
xthal_dcache_region_writeback((addr), (size))
|
|
#define SOC_DCACHE_INVALIDATE(addr, size) \
|
|
xthal_dcache_region_invalidate((addr), (size))
|
|
|
|
/**
|
|
* @brief Return uncached pointer to a RAM address
|
|
*
|
|
* The Intel ADSP architecture maps all addressable RAM (of all types)
|
|
* twice, in two different 512MB segments regions whose L1 cache
|
|
* settings can be controlled independently. So for any given
|
|
* pointer, it is possible to convert it to and from a cached version.
|
|
*
|
|
* This function takes a pointer to any addressible object (either in
|
|
* cacheable memory or not) and returns a pointer that can be used to
|
|
* refer to the same memory while bypassing the L1 data cache. Data
|
|
* in the L1 cache will not be inspected nor modified by the access.
|
|
*
|
|
* @see z_soc_cached_ptr()
|
|
*
|
|
* @param p A pointer to a valid C object
|
|
* @return A pointer to the same object bypassing the L1 dcache
|
|
*/
|
|
static inline void *z_soc_uncached_ptr(void *p)
|
|
{
|
|
return ((void *)(((size_t)p) & ~0x20000000));
|
|
}
|
|
|
|
/**
|
|
* @brief Return cached pointer to a RAM address
|
|
*
|
|
* This function takes a pointer to any addressible object (either in
|
|
* cacheable memory or not) and returns a pointer that can be used to
|
|
* refer to the same memory through the L1 data cache. Data read
|
|
* through the resulting pointer will reflect locally cached values on
|
|
* the current CPU if they exist, and writes will go first into the
|
|
* cache and be written back later.
|
|
*
|
|
* @see z_soc_uncached_ptr()
|
|
*
|
|
* @param p A pointer to a valid C object
|
|
* @return A pointer to the same object via the L1 dcache
|
|
|
|
*/
|
|
static inline void *z_soc_cached_ptr(void *p)
|
|
{
|
|
return ((void *)(((size_t)p) | 0x20000000));
|
|
}
|
|
|
|
#endif
|