esp-idf/components/bootloader/subproject/main/ld/esp32s3/bootloader.ld

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/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/** Simplified memory map for the bootloader.
* Make sure the bootloader can load into main memory without overwriting itself.
*
* ESP32-S3 ROM static data usage is as follows:
* - 0x3fcd7e00 - 0x3fce9704: Shared buffers, used in UART/USB/SPI download mode only
* - 0x3fce9710 - 0x3fceb710: PRO CPU stack, can be reclaimed as heap after RTOS startup
* - 0x3fceb710 - 0x3fced710: APP CPU stack, can be reclaimed as heap after RTOS startup
* - 0x3fced710 - 0x3fcf0000: ROM .bss and .data (not easily reclaimable)
*
* The 2nd stage bootloader can take space up to the end of ROM shared
* buffers area (0x3fce9704). For alignment purpose we shall use value (0x3fce9700).
*/
/* The offset between Dbus and Ibus. Used to convert between 0x403xxxxx and 0x3fcxxxxx addresses. */
iram_dram_offset = 0x6f0000;
/* We consider 0x3fce9700 to be the last usable address for 2nd stage bootloader stack overhead, dram_seg,
* and work out iram_seg and iram_loader_seg addresses from there, backwards.
*/
/* These lengths can be adjusted, if necessary: */
bootloader_usable_dram_end = 0x3fce9700;
bootloader_stack_overhead = 0x2000; /* For safety margin between bootloader data section and startup stacks */
bootloader_dram_seg_len = 0x4000;
bootloader_iram_loader_seg_len = 0x7000;
bootloader_iram_seg_len = 0x3000;
/* Start of the lower region is determined by region size and the end of the higher region */
bootloader_dram_seg_end = bootloader_usable_dram_end - bootloader_stack_overhead;
bootloader_dram_seg_start = bootloader_dram_seg_end - bootloader_dram_seg_len;
bootloader_iram_loader_seg_start = bootloader_dram_seg_start - bootloader_iram_loader_seg_len + iram_dram_offset;
bootloader_iram_seg_start = bootloader_iram_loader_seg_start - bootloader_iram_seg_len;
MEMORY
{
iram_seg (RWX) : org = bootloader_iram_seg_start, len = bootloader_iram_seg_len
iram_loader_seg (RWX) : org = bootloader_iram_loader_seg_start, len = bootloader_iram_loader_seg_len
dram_seg (RW) : org = bootloader_dram_seg_start, len = bootloader_dram_seg_len
}
/* The app may use RAM for static allocations up to the start of iram_loader_seg.
* If you have changed something above and this assert fails:
* 1. Check what the new value of bootloader_iram_loader_seg start is.
* 2. Update the value in this assert.
* 3. Update SRAM_IRAM_END in components/esp_system/ld/esp32s3/memory.ld.in to the same value.
*/
ASSERT(bootloader_iram_loader_seg_start == 0x403cc700, "bootloader_iram_loader_seg_start inconsistent with SRAM_IRAM_END");
/* Default entry point: */
ENTRY(call_start_cpu0);
SECTIONS
{
.iram_loader.text :
{
. = ALIGN (16);
_loader_text_start = ABSOLUTE(.);
*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.iram1 .iram1.*) /* catch stray IRAM_ATTR */
*liblog.a:(.literal .text .literal.* .text.*)
*libgcc.a:(.literal .text .literal.* .text.*)
2020-10-20 06:08:15 -04:00
*libbootloader_support.a:bootloader_clock_loader.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_common_loader.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_flash.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_random.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_random*.*(.literal.bootloader_random_disable .text.bootloader_random_disable)
*libesp_common.a:fpga_overrides.*(.literal.bootloader_fill_random .text.bootloader_fill_random)
*libbootloader_support.a:bootloader_efuse.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_utility.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
2020-10-20 06:08:15 -04:00
*libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:flash_partitions.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:secure_boot.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:secure_boot_secure_features.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:secure_boot_signatures_bootloader.*(.literal .text .literal.* .text.*)
*libmicro-ecc.a:*.*(.literal .text .literal.* .text.*)
*libspi_flash.a:*.*(.literal .text .literal.* .text.*)
*libhal.a:wdt_hal_iram.*(.literal .text .literal.* .text.*)
*libhal.a:mmu_hal.*(.literal .text .literal.* .text.*)
*libhal.a:cache_hal.*(.literal .text .literal.* .text.*)
*libhal.a:efuse_hal.*(.literal .text .literal.* .text.*)
*libesp_hw_support.a:rtc_clk.*(.literal .text .literal.* .text.*)
*libesp_hw_support.a:rtc_time.*(.literal .text .literal.* .text.*)
*libesp_hw_support.a:regi2c_ctrl.*(.literal .text .literal.* .text.*)
*libefuse.a:*.*(.literal .text .literal.* .text.*)
*(.fini.literal)
*(.fini)
*(.gnu.version)
_loader_text_end = ABSOLUTE(.);
} > iram_loader_seg
.iram.text :
{
. = ALIGN (16);
*(.entry.text)
*(.init.literal)
*(.init)
} > iram_seg
/* Shared RAM */
.dram0.bss (NOLOAD) :
{
. = ALIGN (8);
_dram_start = ABSOLUTE(.);
_bss_start = ABSOLUTE(.);
*(.dynsbss)
*(.sbss)
*(.sbss.*)
*(.gnu.linkonce.sb.*)
*(.scommon)
*(.sbss2)
*(.sbss2.*)
*(.gnu.linkonce.sb2.*)
*(.dynbss)
*(.bss)
*(.bss.*)
*(.gnu.linkonce.b.*)
*(COMMON)
. = ALIGN (8);
_bss_end = ABSOLUTE(.);
} > dram_seg
.dram0.data :
{
_data_start = ABSOLUTE(.);
*(.data)
*(.data.*)
*(.gnu.linkonce.d.*)
*(.data1)
*(.sdata)
*(.sdata.*)
*(.gnu.linkonce.s.*)
*(.gnu.linkonce.s2.*)
*(.jcr)
_data_end = ABSOLUTE(.);
} > dram_seg
.dram0.rodata :
{
_rodata_start = ABSOLUTE(.);
*(.rodata)
*(.rodata.*)
*(.gnu.linkonce.r.*)
*(.rodata1)
*(.sdata2 .sdata2.*)
__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
*(.xt_except_table)
*(.gcc_except_table)
*(.gnu.linkonce.e.*)
*(.gnu.version_r)
*(.eh_frame)
. = (. + 3) & ~ 3;
/* C++ constructor and destructor tables, properly ordered: */
__init_array_start = ABSOLUTE(.);
KEEP (*crtbegin.*(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.*) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
__init_array_end = ABSOLUTE(.);
KEEP (*crtbegin.*(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
/* C++ exception handlers table: */
__XT_EXCEPTION_DESCS_ = ABSOLUTE(.);
*(.xt_except_desc)
*(.gnu.linkonce.h.*)
__XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
*(.xt_except_desc_end)
*(.dynamic)
*(.gnu.version_d)
_rodata_end = ABSOLUTE(.);
/* Literals are also RO data. */
_lit4_start = ABSOLUTE(.);
*(*.lit4)
*(.lit4.*)
*(.gnu.linkonce.lit4.*)
_lit4_end = ABSOLUTE(.);
. = ALIGN(4);
_dram_end = ABSOLUTE(.);
} > dram_seg
.iram.text :
{
_stext = .;
_text_start = ABSOLUTE(.);
*(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.iram .iram.*) /* catch stray IRAM_ATTR */
*(.fini.literal)
*(.fini)
*(.gnu.version)
/** CPU will try to prefetch up to 16 bytes of
* of instructions. This means that any configuration (e.g. MMU, PMS) must allow
* safe access to up to 16 bytes after the last real instruction, add
* dummy bytes to ensure this
*/
. += 16;
_text_end = ABSOLUTE(.);
_etext = .;
} > iram_seg
/** This section will be used by the debugger and disassembler to get more information
* about raw data present in the code.
* Indeed, it may be required to add some padding at some points in the code
* in order to align a branch/jump destination on a particular bound.
* Padding these instructions will generate null bytes that shall be
* interpreted as data, and not code by the debugger or disassembler.
* This section will only be present in the ELF file, not in the final binary
* For more details, check GCC-212
*/
.xt.prop 0 :
{
KEEP (*(.xt.prop .gnu.linkonce.prop.*))
}
.xt.lit 0 :
{
KEEP (*(.xt.lit .gnu.linkonce.p.*))
}
}