mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
974b8dd4c4
It is now possible to have any alignment restriction on rodata in the user applicaiton. It will not affect the first section which must be aligned on a 16-byte bound. Closes https://github.com/espressif/esp-idf/issues/6719 Closes https://github.com/espressif/esp-idf/issues/6976
133 lines
4.9 KiB
Plaintext
133 lines
4.9 KiB
Plaintext
/* ESP32S2 Linker Script Memory Layout
|
|
|
|
This file describes the memory layout (memory blocks) by virtual memory addresses.
|
|
|
|
This linker script is passed through the C preprocessor to include configuration options.
|
|
|
|
Please use preprocessor features sparingly!
|
|
Restrict to simple macros with numeric values, and/or #if/#endif blocks.
|
|
*/
|
|
#include "sdkconfig.h"
|
|
|
|
#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
|
|
#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE + CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE)
|
|
#elif defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP)
|
|
#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE)
|
|
#else
|
|
#define ESP_BOOTLOADER_RESERVE_RTC 0
|
|
#endif
|
|
|
|
#ifdef CONFIG_ESP32S2_INSTRUCTION_CACHE_8KB
|
|
#define CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE 0x2000
|
|
#else
|
|
#define CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE 0x4000
|
|
#endif
|
|
|
|
#ifdef CONFIG_ESP32S2_DATA_CACHE_0KB
|
|
#define CONFIG_ESP32S2_DATA_CACHE_SIZE 0
|
|
#elif defined CONFIG_ESP32S2_DATA_CACHE_8KB
|
|
#define CONFIG_ESP32S2_DATA_CACHE_SIZE 0x2000
|
|
#else
|
|
#define CONFIG_ESP32S2_DATA_CACHE_SIZE 0x4000
|
|
#endif
|
|
|
|
#define RAM_IRAM_START 0x40020000
|
|
#define RAM_DRAM_START 0x3FFB0000
|
|
|
|
#define DATA_RAM_END 0x3FFE0000 /* 2nd stage bootloader iram_loader_seg starts at SRAM block 14 (reclaimed after app boots) */
|
|
|
|
#define IRAM_ORG (RAM_IRAM_START + CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE \
|
|
+ CONFIG_ESP32S2_DATA_CACHE_SIZE)
|
|
|
|
#define DRAM_ORG (RAM_DRAM_START + CONFIG_ESP32S2_INSTRUCTION_CACHE_SIZE \
|
|
+ CONFIG_ESP32S2_DATA_CACHE_SIZE)
|
|
|
|
#define I_D_RAM_SIZE DATA_RAM_END - DRAM_ORG
|
|
|
|
MEMORY
|
|
{
|
|
/* All these values assume the flash cache is on, and have the blocks this uses subtracted from the length
|
|
of the various regions. The 'data access port' dram/drom regions map to the same iram/irom regions but
|
|
are connected to the data port of the CPU and eg allow bytewise access. */
|
|
|
|
/* IRAM for CPU.*/
|
|
iram0_0_seg (RX) : org = IRAM_ORG, len = I_D_RAM_SIZE
|
|
|
|
#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
/* Even though the segment name is iram, it is actually mapped to flash
|
|
*/
|
|
iram0_2_seg (RX) : org = 0x40080020, len = 0x780000-0x20
|
|
|
|
/*
|
|
(0x20 offset above is a convenience for the app binary image generation.
|
|
Flash cache has 64KB pages. The .bin file which is flashed to the chip
|
|
has a 0x18 byte file header, and each segment has a 0x08 byte segment
|
|
header. Setting this offset makes it simple to meet the flash cache MMU's
|
|
constraint that (paddr % 64KB == vaddr % 64KB).)
|
|
*/
|
|
#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
|
|
|
|
/* Shared data RAM, excluding memory reserved for bootloader and ROM bss/data/stack. */
|
|
dram0_0_seg (RW) : org = DRAM_ORG, len = I_D_RAM_SIZE
|
|
|
|
#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
/* Flash mapped constant data */
|
|
drom0_0_seg (R) : org = 0x3F000020, len = 0x3f0000-0x20
|
|
|
|
/* (See iram0_2_seg for meaning of 0x20 offset in the above.) */
|
|
#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
|
|
/* RTC fast memory (executable). Persists over deep sleep.
|
|
*/
|
|
rtc_iram_seg(RWX) : org = 0x40070000, len = 0x2000
|
|
|
|
/* RTC slow memory (data accessible). Persists over deep sleep.
|
|
|
|
Start of RTC slow memory is reserved for ULP co-processor code + data, if enabled.
|
|
*/
|
|
rtc_slow_seg(RW) : org = 0x50000000 + CONFIG_ESP32S2_ULP_COPROC_RESERVE_MEM,
|
|
len = 0x2000 - CONFIG_ESP32S2_ULP_COPROC_RESERVE_MEM
|
|
|
|
/* RTC fast memory (same block as above), viewed from data bus */
|
|
rtc_data_seg(RW) : org = 0x3ff9e000, len = 0x2000 - ESP_BOOTLOADER_RESERVE_RTC
|
|
}
|
|
|
|
_static_data_end = _bss_end;
|
|
|
|
_heap_end = 0x40000000;
|
|
|
|
_data_seg_org = ORIGIN(rtc_data_seg);
|
|
|
|
/* The lines below define location alias for .rtc.data section based on Kconfig option.
|
|
When the option is not defined then use slow memory segment
|
|
else the data will be placed in fast memory segment
|
|
TODO: check whether the rtc_data_location is correct for esp32s2 - IDF-761 */
|
|
#ifndef CONFIG_ESP32S2_RTCDATA_IN_FAST_MEM
|
|
REGION_ALIAS("rtc_data_location", rtc_slow_seg );
|
|
#else
|
|
REGION_ALIAS("rtc_data_location", rtc_data_seg );
|
|
#endif
|
|
|
|
#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
REGION_ALIAS("default_code_seg", iram0_2_seg);
|
|
#else
|
|
REGION_ALIAS("default_code_seg", iram0_0_seg);
|
|
#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
|
|
#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
REGION_ALIAS("default_rodata_seg", drom0_0_seg);
|
|
#else
|
|
REGION_ALIAS("default_rodata_seg", dram0_0_seg);
|
|
#endif // CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
|
|
|
|
/**
|
|
* If rodata default segment is placed in `drom0_0_seg`, then flash's first rodata section must
|
|
* also be first in the segment.
|
|
*/
|
|
#ifdef CONFIG_APP_BUILD_USE_FLASH_SECTIONS
|
|
ASSERT(_rodata_reserved_start == ORIGIN(default_rodata_seg),
|
|
".flash.appdesc section must be placed at the beginning of the rodata segment.")
|
|
#endif
|