mirror of
https://github.com/espressif/esp-idf.git
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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
163 lines
5.8 KiB
Plaintext
163 lines
5.8 KiB
Plaintext
/*
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* SPDX-FileCopyrightText: 2021 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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/* ESP32S2 Linker Script Memory Layout
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This file describes the memory layout (memory blocks) by virtual memory addresses.
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This linker script is passed through the C preprocessor to include configuration options.
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Please use preprocessor features sparingly!
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Restrict to simple macros with numeric values, and/or #if/#endif blocks.
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*/
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#include "sdkconfig.h"
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#include "ld.common"
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#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
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#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE + CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE)
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#elif defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP)
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#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE)
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#else
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#define ESP_BOOTLOADER_RESERVE_RTC 0
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#endif
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#ifdef CONFIG_ESP32S2_INSTRUCTION_CACHE_8KB
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#define CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE 0x2000
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#else
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#define CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE 0x4000
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#endif
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#ifdef CONFIG_ESP32S2_DATA_CACHE_0KB
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#define CONFIG_ESP32S2_DATA_CACHE_SIZE 0
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#elif defined CONFIG_ESP32S2_DATA_CACHE_8KB
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#define CONFIG_ESP32S2_DATA_CACHE_SIZE 0x2000
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#else
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#define CONFIG_ESP32S2_DATA_CACHE_SIZE 0x4000
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#endif
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#define RAM_IRAM_START 0x40020000
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#define RAM_DRAM_START 0x3FFB0000
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#define DATA_RAM_END 0x3FFE0000 /* 2nd stage bootloader iram_loader_seg starts at SRAM block 14 (reclaimed after app boots) */
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#define IRAM_ORG (RAM_IRAM_START + CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE \
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+ CONFIG_ESP32S2_DATA_CACHE_SIZE)
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#define DRAM_ORG (RAM_DRAM_START + CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE \
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+ CONFIG_ESP32S2_DATA_CACHE_SIZE)
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#define I_D_RAM_SIZE DATA_RAM_END - DRAM_ORG
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#if defined(CONFIG_ESP32S2_USE_FIXED_STATIC_RAM_SIZE)
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ASSERT((CONFIG_ESP32S2_FIXED_STATIC_RAM_SIZE <= I_D_RAM_SIZE),
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"Fixed static ram data does not fit.")
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#define STATIC_RAM_SIZE CONFIG_ESP32S2_FIXED_STATIC_RAM_SIZE
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#else
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#define STATIC_RAM_SIZE 0
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#endif
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MEMORY
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{
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/* All these values assume the flash cache is on, and have the blocks this uses subtracted from the length
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of the various regions. The 'data access port' dram/drom regions map to the same iram/irom regions but
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are connected to the data port of the CPU and eg allow bytewise access. */
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/* IRAM for CPU.*/
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iram0_0_seg (RX) : org = IRAM_ORG, len = I_D_RAM_SIZE
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#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/* Even though the segment name is iram, it is actually mapped to flash
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*/
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iram0_2_seg (RX) : org = 0x40080020, len = 0x780000-0x20
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/*
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(0x20 offset above is a convenience for the app binary image generation.
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Flash cache has 64KB pages. The .bin file which is flashed to the chip
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has a 0x18 byte file header, and each segment has a 0x08 byte segment
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header. Setting this offset makes it simple to meet the flash cache MMU's
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constraint that (paddr % 64KB == vaddr % 64KB).)
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*/
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#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/* Shared data RAM, excluding memory reserved for bootloader and ROM bss/data/stack. */
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dram0_0_seg (RW) : org = DRAM_ORG, len = I_D_RAM_SIZE - STATIC_RAM_SIZE
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#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/* Flash mapped constant data */
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drom0_0_seg (R) : org = 0x3F000020, len = 0x3f0000-0x20
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/* (See iram0_2_seg for meaning of 0x20 offset in the above.) */
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#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/* RTC fast memory (executable). Persists over deep sleep.
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*/
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rtc_iram_seg(RWX) : org = 0x40070000, len = 0x2000 - ESP_BOOTLOADER_RESERVE_RTC
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/* RTC slow memory (data accessible). Persists over deep sleep.
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Start of RTC slow memory is reserved for ULP co-processor code + data, if enabled.
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*/
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#if CONFIG_ULP_COPROC_ENABLED
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rtc_slow_seg(RW) : org = 0x50000000 + CONFIG_ULP_COPROC_RESERVE_MEM,
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len = 0x2000 - CONFIG_ULP_COPROC_RESERVE_MEM
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#else
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rtc_slow_seg(RW) : org = 0x50000000, len = 0x2000
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#endif // CONFIG_ULP_COPROC_ENABLED
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/* RTC fast memory (same block as above), viewed from data bus */
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rtc_data_seg(RW) : org = 0x3ff9e000, len = 0x2000 - ESP_BOOTLOADER_RESERVE_RTC
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/* external memory, covers the dport, dram0, dram1 cacheable address space */
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extern_ram_seg(RWX) : org = 0x3F800000,
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len = 0x780000
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}
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#if defined(CONFIG_ESP32S2_USE_FIXED_STATIC_RAM_SIZE)
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/* static data ends at defined address */
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_static_data_end = DRAM_ORG + STATIC_RAM_SIZE;
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#else
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_static_data_end = _bss_end;
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#endif
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_heap_end = 0x40000000;
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_data_seg_org = ORIGIN(rtc_data_seg);
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/* The lines below define location alias for .rtc.data section based on Kconfig option.
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When the option is not defined then use slow memory segment
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else the data will be placed in fast memory segment
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TODO: check whether the rtc_data_location is correct for esp32s2 - IDF-761 */
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#ifndef CONFIG_ESP32S2_RTCDATA_IN_FAST_MEM
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REGION_ALIAS("rtc_data_location", rtc_slow_seg );
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#else
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REGION_ALIAS("rtc_data_location", rtc_data_seg );
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#endif
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#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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REGION_ALIAS("default_code_seg", iram0_2_seg);
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#else
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REGION_ALIAS("default_code_seg", iram0_0_seg);
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#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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REGION_ALIAS("default_rodata_seg", drom0_0_seg);
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#else
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REGION_ALIAS("default_rodata_seg", dram0_0_seg);
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#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/**
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* If rodata default segment is placed in `drom0_0_seg`, then flash's first rodata section must
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* also be first in the segment.
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*/
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#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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ASSERT(_rodata_reserved_start == ORIGIN(default_rodata_seg),
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".flash.appdesc section must be placed at the beginning of the rodata segment.")
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#endif
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