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https://github.com/espressif/esp-idf.git
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62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// The HAL layer for RTC CNTL (common part)
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#include "hal/rtc_hal.h"
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#include "soc/soc_caps.h"
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#include "esp32c3/rom/lldesc.h"
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#include "esp_attr.h"
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#define RTC_CNTL_HAL_LINK_BUF_SIZE_MIN (SOC_RTC_CNTL_CPU_PD_DMA_BLOCK_SIZE) /* The minimum size of dma link buffer */
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typedef struct rtc_cntl_link_buf_conf {
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uint32_t cfg[4]; /* 4 word for dma link buffer configuration */
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} rtc_cntl_link_buf_conf_t;
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void * rtc_cntl_hal_dma_link_init(void *elem, void *buff, int size, void *next)
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{
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assert(elem != NULL);
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assert(buff != NULL);
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assert(size >= RTC_CNTL_HAL_LINK_BUF_SIZE_MIN);
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lldesc_t *plink = (lldesc_t *)elem;
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plink->eof = next ? 0 : 1;
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plink->owner = 1;
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plink->size = size >> 4; /* in unit of 16 bytes */
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plink->length = size >> 4;
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plink->buf = buff;
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plink->offset = 0;
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plink->sosf = 0;
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STAILQ_NEXT(plink, qe) = next;
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return (void *)plink;
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}
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void rtc_cntl_hal_enable_cpu_retention(void *addr)
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{
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if (addr) {
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lldesc_t *plink = (lldesc_t *)addr;
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/* dma link buffer configure */
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rtc_cntl_link_buf_conf_t *pbuf = (rtc_cntl_link_buf_conf_t *)plink->buf;
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pbuf->cfg[0] = 0;
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pbuf->cfg[1] = 0;
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pbuf->cfg[2] = 0;
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pbuf->cfg[3] = (uint32_t)-1;
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rtc_cntl_ll_enable_cpu_retention((uint32_t)addr);
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}
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}
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