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https://github.com/espressif/esp-idf.git
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9856198112
Bootloader DRAM now ends at 0x3FFEAB00 which is the start of ROM static RAM (reclaimable after app is running). IRAM loader segment increased by 8KB. Available total static RAM for the app is now reduced by 16KB.
116 lines
4.2 KiB
Plaintext
116 lines
4.2 KiB
Plaintext
/* 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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#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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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
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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
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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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rtc_slow_seg(RW) : org = 0x50000000 + CONFIG_ESP32S2_ULP_COPROC_RESERVE_MEM,
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len = 0x2000 - CONFIG_ESP32S2_ULP_COPROC_RESERVE_MEM
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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
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}
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_static_data_end = _bss_end;
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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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