kopia lustrzana https://github.com/espressif/esp-idf
104 wiersze
3.9 KiB
Plaintext
104 wiersze
3.9 KiB
Plaintext
/**
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* ESP32-C2 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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#define SRAM_IRAM_START 0x4037C000
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#define SRAM_DRAM_START 0x3FCA0000
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#define ICACHE_SIZE 0x4000 /* ICache size is fixed to 16KB on ESP32-C2 */
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#define I_D_SRAM_OFFSET (SRAM_IRAM_START - SRAM_DRAM_START + ICACHE_SIZE)
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#define SRAM_DRAM_END 0x403B0000 - I_D_SRAM_OFFSET /* 2nd stage bootloader iram_loader_seg start address */
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#define SRAM_IRAM_ORG (SRAM_IRAM_START + ICACHE_SIZE)
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#define SRAM_DRAM_ORG (SRAM_DRAM_START)
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#define I_D_SRAM_SIZE SRAM_DRAM_END - SRAM_DRAM_ORG
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#if CONFIG_ESP32C2_USE_FIXED_STATIC_RAM_SIZE
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ASSERT((CONFIG_ESP32C2_FIXED_STATIC_RAM_SIZE <= I_D_SRAM_SIZE), "Fixed static ram data does not fit.")
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#define DRAM0_0_SEG_LEN CONFIG_ESP32C2_FIXED_STATIC_RAM_SIZE
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#else
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#define DRAM0_0_SEG_LEN I_D_SRAM_SIZE
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#endif // CONFIG_ESP32C2_USE_FIXED_STATIC_RAM_SIZE
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MEMORY
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{
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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 byte-wise access.
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*/
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/* IRAM for PRO CPU. */
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iram0_0_seg (RX) : org = SRAM_IRAM_ORG, len = I_D_SRAM_SIZE
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#if CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/* Flash mapped instruction data */
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iram0_2_seg (RX) : org = 0x42000020, len = 0x400000-0x20
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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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/**
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* Shared data RAM, excluding memory reserved for ROM bss/data/stack.
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* Enabling Bluetooth & Trace Memory features in menuconfig will decrease the amount of RAM available.
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*/
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dram0_0_seg (RW) : org = SRAM_DRAM_ORG, len = DRAM0_0_SEG_LEN
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#if CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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/* Flash mapped constant data */
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drom0_0_seg (R) : org = 0x3C000020, len = 0x400000-0x20
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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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}
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#if CONFIG_ESP32C2_USE_FIXED_STATIC_RAM_SIZE
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/* static data ends at defined address */
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_static_data_end = 0x3FCA0000 + DRAM0_0_SEG_LEN;
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#else
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_static_data_end = _bss_end;
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#endif // CONFIG_ESP32C2_USE_FIXED_STATIC_RAM_SIZE
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/* Heap ends at top of dram0_0_seg */
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_heap_end = 0x40000000;
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#if 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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#if 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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#if CONFIG_APP_BUILD_USE_FLASH_SECTIONS
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ASSERT(_flash_rodata_dummy_start == ORIGIN(default_rodata_seg),
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".flash_rodata_dummy section must be placed at the beginning of the rodata segment.")
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#endif
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#if CONFIG_ESP_SYSTEM_USE_EH_FRAME
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ASSERT ((__eh_frame_end > __eh_frame), "Error: eh_frame size is null!");
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ASSERT ((__eh_frame_hdr_end > __eh_frame_hdr), "Error: eh_frame_hdr size is null!");
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#endif
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