/**************************************************************************** * boards/risc-v/esp32c3/common/scripts/esp32c3_flat_memory.ld * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * ESP32-C3 Linker Script Memory Layout * * This file describes the memory layout (memory blocks) as virtual * memory addresses. * * esp32c3__sections.ld contains output sections to link compiler * output into these memory blocks. * ****************************************************************************/ #include "common.ld" #define SRAM_IRAM_START 0x4037c000 #define SRAM_DRAM_START 0x3fc7c000 /* ICache size is fixed to 16KB on ESP32-C3 */ #define ICACHE_SIZE 0x4000 #define I_D_SRAM_OFFSET (SRAM_IRAM_START - SRAM_DRAM_START) /* 2nd stage bootloader iram_loader_seg start address */ #define SRAM_DRAM_END (0x403ce710 - I_D_SRAM_OFFSET) #define SRAM_IRAM_ORG (SRAM_IRAM_START + ICACHE_SIZE) #define SRAM_DRAM_ORG (SRAM_DRAM_START + ICACHE_SIZE) #define I_D_SRAM_SIZE (SRAM_DRAM_END - SRAM_DRAM_ORG) #ifdef CONFIG_ESPRESSIF_FLASH_2M # define FLASH_SIZE 0x200000 #elif defined (CONFIG_ESPRESSIF_FLASH_4M) # define FLASH_SIZE 0x400000 #elif defined (CONFIG_ESPRESSIF_FLASH_8M) # define FLASH_SIZE 0x800000 #elif defined (CONFIG_ESPRESSIF_FLASH_16M) # define FLASH_SIZE 0x1000000 #endif MEMORY { #ifdef CONFIG_ESPRESSIF_BOOTLOADER_MCUBOOT /* The origin values for "metadata" and "ROM" memory regions are the actual * load addresses. * * NOTE: The memory region starting from 0x0 with length represented by * CONFIG_ESPRESSIF_APP_MCUBOOT_HEADER_SIZE is reserved for the MCUboot header, * which will be prepended to the binary file by the "imgtool" during the * signing of firmware image. */ metadata (RX) : org = CONFIG_ESPRESSIF_APP_MCUBOOT_HEADER_SIZE, len = 0x20 ROM (RX) : org = ORIGIN(metadata) + LENGTH(metadata), len = FLASH_SIZE - ORIGIN(ROM) #elif defined (CONFIG_ESPRESSIF_SIMPLE_BOOT) ROM (RX) : org = ORIGIN(ROM), len = FLASH_SIZE - ORIGIN(ROM) #endif /* Below 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 e.g. allow bytewise access. */ iram0_0_seg (RX) : org = SRAM_IRAM_ORG, len = I_D_SRAM_SIZE /* Flash mapped instruction data. */ #ifdef CONFIG_ESPRESSIF_BOOTLOADER_MCUBOOT irom0_0_seg (RX) : org = 0x42000000, len = FLASH_SIZE #else /* The 0x20 offset 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). */ irom0_0_seg (RX) : org = 0x42000000, len = FLASH_SIZE #endif /* Shared data RAM, excluding memory reserved for ROM bss/data/stack. */ dram0_0_seg (RW) : org = SRAM_DRAM_ORG, len = I_D_SRAM_SIZE /* Flash mapped constant data. */ #ifdef CONFIG_ESPRESSIF_BOOTLOADER_MCUBOOT /* The DROM segment origin is offset by 0x40 for mirroring the actual ROM * image layout: * 0x0 - 0x1F : MCUboot header * 0x20 - 0x3F : Application image metadata section * 0x40 onwards: ROM code and data * This is required to meet the following constraint from the external * flash MMU: * VMA % 64KB == LMA % 64KB * i.e. the lower 16 bits of both the virtual address (address seen by the * CPU) and the load address (physical address of the external flash) must * be equal. */ drom0_0_seg (R) : org = 0x3c000000 + ORIGIN(ROM), len = FLASH_SIZE - ORIGIN(ROM) #else /* The 0x20 offset 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). */ drom0_0_seg (R) : org = 0x3c000000, len = FLASH_SIZE #endif /* RTC fast memory (executable). Persists over deep sleep. */ rtc_iram_seg(RWX) : org = 0x50000000, len = 0x2000 - RESERVE_RTC_MEM /* We reduced the size of rtc_iram_seg by RESERVE_RTC_MEM value. * It reserves the amount of RTC fast memory that we use for this memory segment. * This segment is intended for keeping: * - (lower addr) rtc timer data (s_rtc_timer_retain_mem, see esp_clk.c files). * - (higher addr) bootloader rtc data (s_bootloader_retain_mem, when a Kconfig option is on). * The aim of this is to keep data that will not be moved around and have a fixed address. */ rtc_reserved_seg(RW) : org = 0x50000000 + 0x2000 - RESERVE_RTC_MEM, len = RESERVE_RTC_MEM } /* The lines below define location alias for .rtc.data section * As C3 only has RTC fast memory, this is not configurable like on other targets */ REGION_ALIAS("rtc_data_seg", rtc_iram_seg ); REGION_ALIAS("rtc_slow_seg", rtc_iram_seg ); REGION_ALIAS("rtc_data_location", rtc_iram_seg ); #if CONFIG_ESPRESSIF_RUN_IRAM REGION_ALIAS("default_rodata_seg", dram0_0_seg); REGION_ALIAS("default_code_seg", iram0_0_seg); #else REGION_ALIAS("default_rodata_seg", drom0_0_seg); REGION_ALIAS("default_code_seg", irom0_0_seg); #endif /* CONFIG_ESPRESSIF_RUN_IRAM */