esp-idf/components/esp_mm/esp_cache.c

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2.6 KiB
C
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2023-02-15 04:29:34 +00:00
/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <sys/param.h>
#include <inttypes.h>
#include "sdkconfig.h"
#include "esp_check.h"
#include "esp_log.h"
#include "soc/soc_caps.h"
#include "hal/mmu_hal.h"
#include "hal/cache_hal.h"
#include "esp_cache.h"
#include "esp_private/critical_section.h"
static const char *TAG = "cache";
#if SOC_CACHE_WRITEBACK_SUPPORTED
DEFINE_CRIT_SECTION_LOCK_STATIC(s_spinlock);
void s_cache_freeze(void)
{
#if SOC_CACHE_FREEZE_SUPPORTED
cache_hal_freeze(CACHE_TYPE_DATA | CACHE_TYPE_INSTRUCTION);
#endif
/**
* For writeback supported, but the freeze not supported chip (Now only S2),
* as it's single core, the critical section is enough to prevent preemption from an non-IRAM ISR
*/
}
void s_cache_unfreeze(void)
{
#if SOC_CACHE_FREEZE_SUPPORTED
cache_hal_unfreeze(CACHE_TYPE_DATA | CACHE_TYPE_INSTRUCTION);
#endif
/**
* Similarly, for writeback supported, but the freeze not supported chip (Now only S2),
* we don't need to do more
*/
}
#endif //#if SOC_CACHE_WRITEBACK_SUPPORTED
esp_err_t esp_cache_msync(void *addr, size_t size, int flags)
{
ESP_RETURN_ON_FALSE_ISR(addr, ESP_ERR_INVALID_ARG, TAG, "null pointer");
ESP_RETURN_ON_FALSE_ISR(mmu_hal_check_valid_ext_vaddr_region(0, (uint32_t)addr, size, MMU_VADDR_DATA), ESP_ERR_INVALID_ARG, TAG, "invalid address");
#if SOC_CACHE_WRITEBACK_SUPPORTED
if ((flags & ESP_CACHE_MSYNC_FLAG_UNALIGNED) == 0) {
esp_os_enter_critical_safe(&s_spinlock);
uint32_t data_cache_line_size = cache_hal_get_cache_line_size(CACHE_TYPE_DATA);
esp_os_exit_critical_safe(&s_spinlock);
ESP_RETURN_ON_FALSE_ISR(((uint32_t)addr % data_cache_line_size) == 0, ESP_ERR_INVALID_ARG, TAG, "start address isn't aligned with the data cache line size (%d)B", data_cache_line_size);
ESP_RETURN_ON_FALSE_ISR((size % data_cache_line_size) == 0, ESP_ERR_INVALID_ARG, TAG, "size isn't aligned with the data cache line size (%d)B", data_cache_line_size);
ESP_RETURN_ON_FALSE_ISR((((uint32_t)addr + size) % data_cache_line_size) == 0, ESP_ERR_INVALID_ARG, TAG, "end address isn't aligned with the data cache line size (%d)B", data_cache_line_size);
}
uint32_t vaddr = (uint32_t)addr;
esp_os_enter_critical_safe(&s_spinlock);
s_cache_freeze();
cache_hal_writeback_addr(vaddr, size);
if (flags & ESP_CACHE_MSYNC_FLAG_INVALIDATE) {
cache_hal_invalidate_addr(vaddr, size);
}
s_cache_unfreeze();
esp_os_exit_critical_safe(&s_spinlock);
#endif
return ESP_OK;
}