mirror of
https://github.com/espressif/esp-idf.git
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315 lines
12 KiB
Plaintext
315 lines
12 KiB
Plaintext
/*
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* SPDX-FileCopyrightText: 2023-2024 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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/**
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* TODO: IDF-8002
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* Simplified memory map for the bootloader.
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* Make sure the bootloader can load into main memory without overwriting itself.
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*
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* ESP32-P4 ROM static data usage is as follows:
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* - 0x4ff296b8 - 0x4ff3afc0: Shared buffers, used in UART/USB/SPI download mode only
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* - 0x4ff3afc0 - 0x4ff3fba4: CPU1 stack, can be reclaimed as heap after RTOS startup
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* - 0x4ff3fba4 - 0x4ff40000: ROM .bss and .data (not easily reclaimable)
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*
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* The 2nd stage bootloader can take space up to the end of ROM shared
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* buffers area (0x4087c610).
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*/
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/* We consider 0x4087c610 to be the last usable address for 2nd stage bootloader stack overhead, dram_seg,
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* and work out iram_seg and iram_loader_seg addresses from there, backwards.
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*/
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/* These lengths can be adjusted, if necessary: */
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bootloader_usable_dram_end = 0x4ff3abd0;
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bootloader_stack_overhead = 0x2000; /* For safety margin between bootloader data section and startup stacks */
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bootloader_dram_seg_len = 0x5000;
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bootloader_iram_loader_seg_len = 0x7000;
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bootloader_iram_seg_len = 0x2000;
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/* Start of the lower region is determined by region size and the end of the higher region */
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bootloader_dram_seg_end = bootloader_usable_dram_end - bootloader_stack_overhead;
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bootloader_dram_seg_start = bootloader_dram_seg_end - bootloader_dram_seg_len;
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bootloader_iram_loader_seg_start = bootloader_dram_seg_start - bootloader_iram_loader_seg_len;
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bootloader_iram_seg_start = bootloader_iram_loader_seg_start - bootloader_iram_seg_len;
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MEMORY
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{
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iram_seg (RWX) : org = bootloader_iram_seg_start, len = bootloader_iram_seg_len
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iram_loader_seg (RWX) : org = bootloader_iram_loader_seg_start, len = bootloader_iram_loader_seg_len
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dram_seg (RW) : org = bootloader_dram_seg_start, len = bootloader_dram_seg_len
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}
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/* The app may use RAM for static allocations up to the start of iram_loader_seg.
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* If you have changed something above and this assert fails:
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* 1. Check what the new value of bootloader_iram_loader_seg start is.
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* 2. Update the value in this assert.
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* 3. Update SRAM_DRAM_END in components/esp_system/ld/esp32p4/memory.ld.in to the same value.
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*/
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ASSERT(bootloader_iram_loader_seg_start == 0x4FF2CBD0, "bootloader_iram_loader_seg_start inconsistent with SRAM_DRAM_END");
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/* Default entry point: */
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ENTRY(call_start_cpu0);
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SECTIONS
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{
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.iram_loader.text :
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{
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. = ALIGN (16);
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_loader_text_start = ABSOLUTE(.);
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*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
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*(.iram1 .iram1.*) /* catch stray IRAM_ATTR */
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*liblog.a:(.literal .text .literal.* .text.*)
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*libgcc.a:(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_clock_loader.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_common_loader.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_flash.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_random.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_random*.*(.literal.bootloader_random_disable .text.bootloader_random_disable)
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*libbootloader_support.a:bootloader_random*.*(.literal.bootloader_random_enable .text.bootloader_random_enable)
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*libbootloader_support.a:bootloader_efuse.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_utility.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:flash_partitions.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:secure_boot.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:secure_boot_secure_features.*(.literal .text .literal.* .text.*)
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*libbootloader_support.a:secure_boot_signatures_bootloader.*(.literal .text .literal.* .text.*)
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*libmicro-ecc.a:*.*(.literal .text .literal.* .text.*)
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*libspi_flash.a:*.*(.literal .text .literal.* .text.*)
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*libhal.a:wdt_hal_iram.*(.literal .text .literal.* .text.*)
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*libhal.a:mmu_hal.*(.literal .text .literal.* .text.*)
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*libhal.a:cache_hal.*(.literal .text .literal.* .text.*)
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*libhal.a:efuse_hal.*(.literal .text .literal.* .text.*)
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*libhal.a:key_mgr_hal.*(.literal.key_mgr_hal_set_key_usage .text.key_mgr_hal_set_key_usage)
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*libesp_hw_support.a:rtc_clk.*(.literal .text .literal.* .text.*)
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*libesp_hw_support.a:rtc_time.*(.literal .text .literal.* .text.*)
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*libesp_hw_support.a:regi2c_ctrl.*(.literal .text .literal.* .text.*)
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*libefuse.a:*.*(.literal .text .literal.* .text.*)
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*(.fini.literal)
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*(.fini)
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*(.gnu.version)
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_loader_text_end = ABSOLUTE(.);
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} > iram_loader_seg
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.iram.text :
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{
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. = ALIGN (16);
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*(.entry.text)
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*(.init.literal)
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*(.init)
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} > iram_seg
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/* Shared RAM */
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.dram0.bss (NOLOAD) :
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{
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. = ALIGN (8);
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_dram_start = ABSOLUTE(.);
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_bss_start = ABSOLUTE(.);
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*(.dynsbss)
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*(.sbss)
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*(.sbss.*)
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*(.gnu.linkonce.sb.*)
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*(.scommon)
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*(.sbss2)
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*(.sbss2.*)
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*(.gnu.linkonce.sb2.*)
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*(.dynbss)
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*(.bss)
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*(.bss.*)
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*(.gnu.linkonce.b.*)
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*(COMMON)
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. = ALIGN (8);
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_bss_end = ABSOLUTE(.);
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} > dram_seg
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.dram0.bootdesc : ALIGN(0x10)
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{
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_data_start = ABSOLUTE(.);
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*(.data_bootloader_desc .data_bootloader_desc.*) /* Should be the first. Bootloader version info. DO NOT PUT ANYTHING BEFORE IT! */
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} > dram_seg
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.dram0.data :
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{
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*(.dram1 .dram1.*) /* catch stray DRAM_ATTR */
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*(.data)
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*(.data.*)
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*(.gnu.linkonce.d.*)
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*(.data1)
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*(.sdata)
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*(.sdata.*)
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*(.gnu.linkonce.s.*)
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*(.gnu.linkonce.s2.*)
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*(.jcr)
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_data_end = ABSOLUTE(.);
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} > dram_seg
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.dram0.rodata :
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{
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_rodata_start = ABSOLUTE(.);
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*(.rodata)
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*(.rodata.*)
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*(.gnu.linkonce.r.*)
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*(.rodata1)
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*(.sdata2 .sdata2.* .srodata .srodata.*)
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__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
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*(.xt_except_table)
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*(.gcc_except_table)
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*(.gnu.linkonce.e.*)
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*(.gnu.version_r)
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*(.eh_frame_hdr)
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*(.eh_frame)
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. = (. + 3) & ~ 3;
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/* C++ constructor and destructor tables, properly ordered: */
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__init_array_start = ABSOLUTE(.);
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KEEP (*crtbegin.*(.ctors))
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KEEP (*(EXCLUDE_FILE (*crtend.*) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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__init_array_end = ABSOLUTE(.);
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KEEP (*crtbegin.*(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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/* C++ exception handlers table: */
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__XT_EXCEPTION_DESCS_ = ABSOLUTE(.);
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*(.xt_except_desc)
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*(.gnu.linkonce.h.*)
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__XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
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*(.xt_except_desc_end)
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*(.dynamic)
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*(.gnu.version_d)
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_rodata_end = ABSOLUTE(.);
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/* Literals are also RO data. */
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_lit4_start = ABSOLUTE(.);
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*(*.lit4)
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*(.lit4.*)
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*(.gnu.linkonce.lit4.*)
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_lit4_end = ABSOLUTE(.);
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. = ALIGN(4);
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_dram_end = ABSOLUTE(.);
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} > dram_seg
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.iram.text :
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{
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_stext = .;
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_text_start = ABSOLUTE(.);
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*(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
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*(.iram .iram.*) /* catch stray IRAM_ATTR */
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*(.fini.literal)
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*(.fini)
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*(.gnu.version)
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/** CPU will try to prefetch up to 16 bytes of
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* of instructions. This means that any configuration (e.g. MMU, PMS) must allow
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* safe access to up to 16 bytes after the last real instruction, add
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* dummy bytes to ensure this
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*/
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. += 16;
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_text_end = ABSOLUTE(.);
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_etext = .;
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} > iram_seg
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.riscv.attributes 0: { *(.riscv.attributes) }
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/* DWARF 1 */
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.debug 0 : { *(.debug) }
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.line 0 : { *(.line) }
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/* GNU DWARF 1 extensions */
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.debug_srcinfo 0 : { *(.debug_srcinfo) }
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.debug_sfnames 0 : { *(.debug_sfnames) }
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/* DWARF 1.1 and DWARF 2 */
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.debug_aranges 0 : { *(.debug_aranges) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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/* DWARF 2 */
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.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_line 0 : { *(.debug_line) }
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.debug_frame 0 : { *(.debug_frame) }
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.debug_str 0 : { *(.debug_str) }
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.debug_loc 0 : { *(.debug_loc) }
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.debug_macinfo 0 : { *(.debug_macinfo) }
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.debug_pubtypes 0 : { *(.debug_pubtypes) }
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/* DWARF 3 */
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.debug_ranges 0 : { *(.debug_ranges) }
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/* SGI/MIPS DWARF 2 extensions */
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.debug_weaknames 0 : { *(.debug_weaknames) }
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.debug_funcnames 0 : { *(.debug_funcnames) }
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.debug_typenames 0 : { *(.debug_typenames) }
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.debug_varnames 0 : { *(.debug_varnames) }
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/* GNU DWARF 2 extensions */
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.debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }
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.debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }
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/* DWARF 4 */
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.debug_types 0 : { *(.debug_types) }
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/* DWARF 5 */
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.debug_addr 0 : { *(.debug_addr) }
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.debug_line_str 0 : { *(.debug_line_str) }
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.debug_loclists 0 : { *(.debug_loclists) }
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.debug_macro 0 : { *(.debug_macro) }
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.debug_names 0 : { *(.debug_names) }
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.debug_rnglists 0 : { *(.debug_rnglists) }
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.debug_str_offsets 0 : { *(.debug_str_offsets) }
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.comment 0 : { *(.comment) }
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.note.GNU-stack 0: { *(.note.GNU-stack) }
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/**
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* Discarding .rela.* sections results in the following mapping:
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* .rela.text.* -> .text.*
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* .rela.data.* -> .data.*
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* And so forth...
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*/
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/DISCARD/ : { *(.rela.*) }
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}
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/**
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* Appendix: Memory Usage of ROM bootloader
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*
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* 0x4ff296b8 ------------------> _dram0_0_start
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* | |
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* | |
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* | | 1. Large buffers that are only used in certain boot modes, see shared_buffers.h
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* | |
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* | |
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* 0x4ff3afc0 ------------------> __stack_sentry
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* | |
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* | | 2. Startup pro cpu stack (freed when IDF app is running)
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* | |
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* 0x4ff3cfc0 ------------------> __stack (pro cpu)
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* | |
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* | | Startup app cpu stack
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* | |
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* 0x4ff3efc0 ------------------> __stack_app (app cpu)
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* | |
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* | |
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* | | 3. Shared memory only used in startup code or nonos/early boot*
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* | | (can be freed when IDF runs)
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* | |
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* | |
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* 0x4ff3fba4 ------------------> _dram0_rtos_reserved_start
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* | |
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* | |
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* | | 4. Shared memory used in startup code and when IDF runs
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* | |
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* | |
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* 0x4ff3ff94 ------------------> _dram0_rtos_reserved_end
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* | |
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* 0x4ff3ffc8 ------------------> _data_start_interface
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* | |
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* | | 5. End of DRAM is the 'interface' data with constant addresses (ECO compatible)
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* | |
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* 0x4ff40000 ------------------> _data_end_interface
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*/
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