mirror of
https://github.com/espressif/esp-idf.git
synced 2024-09-21 06:56:11 -04:00
2d44dc1eed
This commit gives basic mmu driver framework. Now it is able to maintain mmu virtual address usage on esp32, esp32s2 and esp32s3. Usage to external virtual address should rely on mmu functions to know which address range is available, instead of hardcoded. This commit also improves psram memory that is added to the heap allocator. Now it's added to the heap, according to the memory alignment. Closes https://github.com/espressif/esp-idf/issues/8295
139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @Backgrounds
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*
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* This file contains 2 parts:
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* 1. Feature: Copy Flash content to PSRAM. Related APIs are private:
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* - mmu_config_psram_text_segment()
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* - mmu_config_psram_rodata_segment()
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*
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* 2. Private APIs used by `flash_mmap.c` and `cache_utils.c`
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* APIs in 2 are due to lack of MMU driver. There will be an MMU driver to maintain vaddr range.
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* APIs in 2 will be refactored when MMU driver is ready
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*/
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#pragma once
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#include <sys/param.h>
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#include "esp_err.h"
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#include "sdkconfig.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if CONFIG_IDF_TARGET_ESP32
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#define MMU_PAGE_SIZE 0x8000
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#else
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#define MMU_PAGE_SIZE 0x10000
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#define MMU_PAGE_TO_BYTES(page_id) ((page_id) * MMU_PAGE_SIZE)
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#define BYTES_TO_MMU_PAGE(bytes) ((bytes) / MMU_PAGE_SIZE)
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#endif
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/*----------------------------------------------------------------------------
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Part 1 APIs (See @Backgrounds on top of this file)
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-------------------------------------------------------------------------------*/
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#if CONFIG_SPIRAM_FETCH_INSTRUCTIONS
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/**
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* @brief Copy Flash texts to PSRAM
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*
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* @param[in] start_page PSRAM physical start page
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* @param[in] psram_size PSRAM available size
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* @param[out] out_page Used pages
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*/
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esp_err_t mmu_config_psram_text_segment(uint32_t start_page, uint32_t psram_size, uint32_t *out_page);
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#endif //#if CONFIG_SPIRAM_FETCH_INSTRUCTIONS
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#if CONFIG_SPIRAM_RODATA
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/**
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* @brief Copy Flash rodata to PSRAM
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*
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* @param[in] start_page PSRAM physical start page
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* @param[in] psram_size PSRAM available size
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* @param[out] out_page Used pages
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*/
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esp_err_t mmu_config_psram_rodata_segment(uint32_t start_page, uint32_t psram_size, uint32_t *out_page);
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#endif //#if CONFIG_SPIRAM_RODATA
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/*----------------------------------------------------------------------------
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Part 2 APIs (See @Backgrounds on top of this file)
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-------------------------------------------------------------------------------*/
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#if CONFIG_SPIRAM_FETCH_INSTRUCTIONS
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/**
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* @brief Init other file requested MMU variables
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*
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* - These logics are abstracted from the PSRAM driver
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* - These functions are only required by `flash_mmap.c` for converting paddr to vaddr, and vice versa
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* - The `flash_mmpa.c` will be rewritten into MMU driver
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*
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* Therefore, keep the APIs here for now
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*/
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void instruction_flash_page_info_init(uint32_t psram_start_physical_page);
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/**
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* @brief Get the start page number of the instruction in SPI flash
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*
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* @return start page number
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*/
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uint32_t instruction_flash_start_page_get(void);
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/**
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* @brief Get the end page number of the instruction in SPI flash
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*
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* @return end page number
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*/
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uint32_t instruction_flash_end_page_get(void);
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/**
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* @brief Get the offset of instruction from SPI flash to SPI RAM
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*
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* @return instruction offset
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*/
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int instruction_flash2spiram_offset(void);
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#endif // #if CONFIG_SPIRAM_FETCH_INSTRUCTIONS
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#if CONFIG_SPIRAM_RODATA
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/**
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* @brief Init other file requested MMU variables
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*
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* - These logics are abstracted from the PSRAM driver
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* - These functions are only required by `flash_mmap.c` for converting paddr to vaddr, and vice versa
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* - The `flash_mmpa.c` will be rewritten into MMU driver
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*
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* Therefore, keep the APIs here for now
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*/
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void rodata_flash_page_info_init(uint32_t psram_start_physical_page);
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/**
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* @brief Get the start page number of the rodata in SPI flash
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*
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* @return start page number
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*/
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uint32_t rodata_flash_start_page_get(void);
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/**
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* @brief Get the end page number of the rodata in SPI flash
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*
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* @return end page number
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*/
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uint32_t rodata_flash_end_page_get(void);
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/**
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* @brief Get the offset number of rodata from SPI flash to SPI RAM
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*
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* @return rodata offset
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*/
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int rodata_flash2spiram_offset(void);
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#endif // #if CONFIG_SPIRAM_RODATA
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#ifdef __cplusplus
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}
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#endif
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