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d098c1dc87
nuttx/boards/xtensa/esp32s3/common/scripts/simple_boot_sections.ld
Almir Okato d098c1dc87 esp32s3: add simple boot support 
The Simple Boot feature for Espressif chips is a method of booting
that doesn't depend on a 2nd stage bootloader. Its not the
intention to replace a 2nd stage bootloader such as MCUboot and
ESP-IDF bootloader, but to have a minimal and straight-forward way
of booting, and also simplify the building.

This commit also removes deprecated code and makes this bootloader
configuration as default for esp32s3 targets and removes the need
for running 'make bootloader' command for it.

Other related fix, but not directly to Simple Boot:
- Instrumentation is required to run from IRAM to support it during
initialization. `is_eco0` function also needs to run from IRAM.
- `rtc.data` section placement was fixed.
- Provide arch-defined interfaces for efuses, in order to decouple
board config level from arch-defined values.

Signed-off-by: Almir Okato <almir.okato@espressif.com>
2024-04-17 19:43:05 +08:00

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/****************************************************************************
* boards/xtensa/esp32s3/common/scripts/mcuboot_sections.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.
*
****************************************************************************/
#include <nuttx/config.h>
/* Default entry point: */
ENTRY(__start);
_diram_i_start = 0x40378000;
SECTIONS
{
/* Send .iram0 code to iram */
.iram0.vectors :
{
_iram_start = ABSOLUTE(.);
/* Vectors go to IRAM. */
_init_start = ABSOLUTE(.);
/* Vectors according to builds/RF-2015.2-win32/esp108_v1_2_s5_512int_2/config.html */
. = 0x0;
KEEP (*(.window_vectors.text));
. = 0x180;
KEEP (*(.xtensa_level2_vector.text));
. = 0x1c0;
KEEP (*(.xtensa_level3_vector.text));
. = 0x200;
KEEP (*(.xtensa_level4_vector.text));
. = 0x240;
KEEP (*(.xtensa_level5_vector.text));
. = 0x280;
KEEP (*(.debug_exception_vector.text));
. = 0x2c0;
KEEP (*(.nmi_vector.text));
. = 0x300;
KEEP (*(.kernel_exception_vector.text));
. = 0x340;
KEEP (*(.user_exception_vector.text));
. = 0x3c0;
KEEP (*(.double_exception_vector.text));
. = 0x400;
*(.*_vector.literal)
. = ALIGN(16);
*(.entry.text)
*(.init.literal)
*(.init)
_init_end = ABSOLUTE(.);
} >iram0_0_seg AT>ROM
.iram0.text :
{
/* Code marked as running out of IRAM */
*(.iram1 .iram1.*)
esp32s3_start.*(.literal .text .literal.* .text.*)
*libarch.a:esp32s3_cpuindex.*(.literal .text .literal.* .text.*)
*libarch.a:esp32s3_irq.*(.literal .text .literal.* .text.*)
*libarch.a:esp32s3_user.*(.literal .text .literal.* .text.*)
*libarch.a:esp32s3_spiflash.*(.literal .text .literal.* .text.*)
*libarch.a:xtensa_assert.*(.literal .text .literal.* .text.*)
*libarch.a:xtensa_cpuint.*(.literal .text .literal.* .text.*)
*libarch.a:xtensa_cpupause.*(.literal .text .literal.* .text.*)
*libarch.a:xtensa_irqdispatch.*(.literal .text .literal.* .text.*)
*libarch.a:xtensa_modifyreg32.*(.literal .text .literal.* .text.*)
*libarch.a:xtensa_testset.*(.literal .text .literal.* .text.*)
#ifdef CONFIG_ESP32S3_BLE
*libc.a:sq_remlast.*(.literal .text .literal.* .text.*)
#endif
*libdrivers.a:syslog_flush.*(.literal .text .literal.* .text.*)
*libsched.a:assert.*(.literal .text .literal.* .text.*)
*libsched.a:irq_csection.*(.literal .text .literal.* .text.*)
*libsched.a:irq_dispatch.*(.literal .text .literal.* .text.*)
*libsched.a:irq_spinlock.*(.literal .text .literal.* .text.*)
*libsched.a:sched_note.*(.literal .text .literal.* .text.*)
*libsched.a:sched_suspendscheduler.*(.literal .text .literal.* .text.*)
*libsched.a:sched_thistask.*(.literal .text .literal.* .text.*)
*libsched.a:spinlock.*(.literal .text .literal.* .text.*)
*libsched.a:*sched_get_stackinfo.*(.literal .text .literal.* .text.*)
#ifdef CONFIG_ESP32S3_SPEED_UP_ISR
*libarch.a:xtensa_switchcontext.*(.literal.up_switch_context .text.up_switch_context)
*libarch.a:esp32s3_timerisr.*(.literal.systimer_isr .text.systimer_isr)
*libarch.a:esp32s3_idle.*(.literal.up_idle .text.up_idle)
*libarch.a:esp32s3_dma.*(.literal.esp32s3_dma_load .text.esp32s3_dma_load \
.literal.esp32s3_dma_enable .text.esp32s3_dma_enable)
*libsched.a:sched_processtimer.*(.literal.nxsched_process_timer .text.nxsched_process_timer)
*libsched.a:clock_initialize.*(.literal.clock_timer .text.clock_timer)
*libsched.a:wd_start.*(.literal.wd_timer .text.wd_timer)
*libsched.a:sched_roundrobin.*(.literal.nxsched_process_roundrobin .text.nxsched_process_roundrobin)
*libsched.a:sched_reprioritizertr.*(.literal.nxsched_reprioritize_rtr .text.nxsched_reprioritize_rtr)
*libsched.a:sched_removereadytorun.*(.literal.nxsched_remove_readytorun .text.nxsched_remove_readytorun)
*libsched.a:sched_addreadytorun.*(.literal.nxsched_add_readytorun .text.nxsched_add_readytorun)
*libsched.a:sched_addprioritized.*(.literal.nxsched_add_prioritized .text.nxsched_add_prioritized)
*libsched.a:sched_mergepending.*(.literal.nxsched_merge_pending .text.nxsched_merge_pending)
*libsched.a:sched_resumescheduler.*(.literal.nxsched_resume_scheduler .text.nxsched_resume_scheduler)
*libc.a:sq_remfirst.*(.literal.sq_remfirst .text.sq_remfirst)
#endif
*libarch.a:esp32s3_spi_timing.*(.literal .text .literal.* .text.*)
#ifdef CONFIG_ESP32S3_SPIRAM_MODE_QUAD
*libarch.a:esp32s3_psram_quad.*(.literal .text .literal.* .text.*)
#endif
#ifdef CONFIG_ESP32S3_SPIRAM_MODE_OCT
*libarch.a:esp32s3_psram_octal.*(.literal .text .literal.* .text.*)
#endif
#if defined(CONFIG_STACK_CANARIES) && \
(defined(CONFIG_ESP32S3_SPIFLASH) || \
defined(CONFIG_ESP32S3_SPIRAM))
*libc.a:lib_stackchk.*(.literal .text .literal.* .text.*)
#endif
*libarch.a:*brownout_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*cpu.*(.text .text.* .literal .literal.*)
*libarch.a:*gpio_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*periph_ctrl.*(.text .text.* .literal .literal.*)
*libarch.a:*clk.*(.text .text.* .literal .literal.*)
*libarch.a:*efuse_hal.*(.literal.is_eco0 .text.is_eco0)
*libarch.a:*esp_clk.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_clk_tree.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_clk_tree_common.*(.text .text.* .literal .literal.*)
*libarch.a:*clk_tree_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*rtc_init.*(.text .text.* .literal .literal.*)
*libarch.a:*rtc_clk.*(.text .text.* .literal .literal.*)
*libarch.a:*rtc_clk_init.*(.text .text.* .literal .literal.*)
*libarch.a:*rtc_sleep.*(.text .text.* .literal .literal.*)
*libarch.a:*rtc_time.*(.text .text.* .literal .literal.*)
*libarch.a:*regi2c_ctrl.*(.text .text.* .literal .literal.*)
*libarch.a:*uart_hal_iram.*(.text .text.* .literal .literal.*)
*libarch.a:*wdt_hal_iram.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_banner_wrap.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_init.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_common.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_common_loader.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_console.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_console_loader.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_esp32s3.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_flash.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_flash_config_esp32s3.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_clock_init.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_clock_loader.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_efuse.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_panic.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_mem.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_random.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_random*.*(.literal.bootloader_random_disable .text.bootloader_random_disable)
*libarch.a:*bootloader_random*.*(.literal.bootloader_random_enable .text.bootloader_random_enable)
*libarch.a:*bootloader_random_esp32s3.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_image_format.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_soc.*(.text .text.* .literal .literal.*)
*libarch.a:*bootloader_sha.*(.text .text.* .literal .literal.*)
*libarch.a:*flash_encrypt.*(.text .text.* .literal .literal.*)
*libarch.a:*cache_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*uart_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*mpu_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*mmu_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*efuse_hal.*(.text .text.* .literal .literal.*)
*libarch.a:*uart_periph.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_rom_uart.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_rom_sys.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_rom_spiflash.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_rom_cache_esp32s2_esp32s3.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_rom_wdt.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_efuse_fields.*(.text .text.* .literal .literal.*)
*libarch.a:*esp_efuse_api_key.*(.text .text.* .literal .literal.*)
*libarch.a:*log.*(.text .text.* .literal .literal.*)
*libarch.a:*log_noos.*(.text .text.* .literal .literal.*)
*libarch.a:*cpu_region_protect.*(.text .text.* .literal .literal.*)
*libarch.a:*mspi_timing_tuning.*(.text .text.* .literal .literal.*)
*libc.a:*lib_instrument.*(.text .text.* .literal .literal.*)
*(.wifirxiram .wifirxiram.*)
*(.wifi0iram .wifi0iram.*)
*(.wifiorslpiram .wifiorslpiram.*)
*(.wifislpiram .wifislpiram.*)
*(.wifislprxiram .wifislprxiram.*)
*(.phyiram .phyiram.*)
/* align + add 16B for CPU dummy speculative instr. fetch */
. = ALIGN(4) + 16;
_iram_text = ABSOLUTE(.);
} >iram0_0_seg AT > ROM
.dram0.dummy (NOLOAD) :
{
/* This section is required to skip .iram0.text area because iram0_0_seg
* and dram0_0_seg reflect the same address space on different buses.
*/
. = ORIGIN(dram0_0_seg) + MAX(_iram_end, _diram_i_start) - _diram_i_start;
} >dram0_0_seg
/* Shared RAM */
.dram0.bss (NOLOAD) :
{
/* .bss initialized on power-up */
. = ALIGN(8);
_bss_start = ABSOLUTE(.);
_sbss = ABSOLUTE(.);
*(.bss .bss.*)
*(COMMON)
*(.dynsbss)
*(.sbss)
*(.sbss.*)
*(.gnu.linkonce.sb.*)
*(.scommon)
*(.sbss2)
*(.sbss2.*)
*(.gnu.linkonce.sb2.*)
*(.dynbss)
*(.share.mem)
*(.gnu.linkonce.b.*)
. = ALIGN(8);
_ebss = ABSOLUTE(.);
_bss_end = ABSOLUTE(.);
} >dram0_0_seg
.noinit (NOLOAD) :
{
/* This section contains data that is not initialized during load,
* or during the application's initialization sequence.
*/
. = ALIGN(4);
*(.noinit .noinit.*)
. = ALIGN(4);
} >dram0_0_seg
.dram0.data :
{
/* .data initialized on power-up in ROMed configurations. */
. = ALIGN (16);
_data_start = ABSOLUTE(.);
_sdata = ABSOLUTE(.);
KEEP (*(.data))
KEEP (*(.data.*))
KEEP (*(.gnu.linkonce.d.*))
KEEP (*(.data1))
KEEP (*(.sdata))
KEEP (*(.sdata.*))
KEEP (*(.gnu.linkonce.s.*))
KEEP (*(.sdata2))
KEEP (*(.sdata2.*))
KEEP (*(.gnu.linkonce.s2.*))
KEEP (*(.jcr))
*(.dram1 .dram1.*)
esp32s3_start.*(.rodata .rodata.*)
*libphy.a:(.rodata .rodata.*)
*libarch.a:xtensa_context.*(.rodata .rodata.*)
#if defined(CONFIG_STACK_CANARIES) && \
(defined(CONFIG_ESP32S3_SPIFLASH) || \
defined(CONFIG_ESP32S3_SPIRAM))
*libc.a:lib_stackchk.*(.rodata .rodata.*)
#endif
*libsched.a:*sched_get_stackinfo.*(.rodata .rodata.*)
*libarch.a:esp32s3_spiflash.*(.rodata .rodata.*)
*libarch.a:*brownout.*(.rodata .rodata.*)
*libarch.a:*cpu.*(.rodata .rodata.*)
*libarch.a:*gpio_hal.*(.rodata .rodata.*)
*libarch.a:*periph_ctrl.*(.rodata .rodata.*)
*libarch.a:*clk.*(.rodata .rodata.*)
*libarch.a:*esp_clk.*(.rodata .rodata.*)
*libarch.a:*esp_clk_tree.*(.rodata .rodata.*)
*libarch.a:*esp_clk_tree_common.*(.rodata .rodata.*)
*libarch.a:*clk_tree_hal.*(.rodata .rodata.*)
*libarch.a:*rtc_init.*(.rodata .rodata.*)
*libarch.a:*rtc_clk.*(.rodata .rodata.*)
*libarch.a:*rtc_clk_init.*(.rodata .rodata.*)
*libarch.a:*rtc_sleep.*(.rodata .rodata.*)
*libarch.a:*rtc_time.*(.rodata .rodata.*)
*libarch.a:*regi2c_ctrl.*(.rodata .rodata.*)
*libarch.a:*uart_hal_iram.*(.rodata .rodata.*)
*libarch.a:*wdt_hal_iram.*(.rodata .rodata.*)
*libarch.a:*bootloader_banner_wrap.*(.rodata .rodata.*)
*libarch.a:*bootloader_init.*(.rodata .rodata.*)
*libarch.a:*bootloader_common.*(.rodata .rodata.*)
*libarch.a:*bootloader_common_loader.*(.rodata .rodata.*)
*libarch.a:*bootloader_console.*(.rodata .rodata.*)
*libarch.a:*bootloader_console_loader.*(.rodata .rodata.*)
*libarch.a:*bootloader_esp32s3.*(.rodata .rodata.*)
*libarch.a:*bootloader_flash.*(.rodata .rodata.*)
*libarch.a:*bootloader_flash_config_esp32s3.*(.rodata .rodata.*)
*libarch.a:*bootloader_clock_init.*(.rodata .rodata.*)
*libarch.a:*bootloader_clock_loader.*(.rodata .rodata.*)
*libarch.a:*bootloader_efuse.*(.rodata .rodata.*)
*libarch.a:*bootloader_panic.*(.rodata .rodata.*)
*libarch.a:*bootloader_mem.*(.rodata .rodata.*)
*libarch.a:*bootloader_random.*(.rodata .rodata.*)
*libarch.a:*bootloader_random_esp32s3.*(.rodata .rodata.*)
*libarch.a:*esp_image_format.*(.rodata .rodata.*)
*libarch.a:*bootloader_soc.*(.rodata .rodata.*)
*libarch.a:*bootloader_sha.*(.rodata .rodata.*)
*libarch.a:*flash_encrypt.*(.rodata .rodata.*)
*libarch.a:*cache_hal.*(.rodata .rodata.*)
*libarch.a:*uart_hal.*(.rodata .rodata.*)
*libarch.a:*mpu_hal.*(.rodata .rodata.*)
*libarch.a:*mmu_hal.*(.rodata .rodata.*)
*libarch.a:*uart_periph.*(.rodata .rodata.*)
*libarch.a:*esp_rom_uart.*(.rodata .rodata.*)
*libarch.a:*esp_rom_sys.*(.rodata .rodata.*)
*libarch.a:*esp_rom_spiflash.*(.rodata .rodata.*)
*libarch.a:*esp_rom_cache_esp32s2_esp32s3.*(.rodata .rodata.*)
*libarch.a:*esp_rom_wdt.*(.rodata .rodata.*)
*libarch.a:*esp_efuse_fields.*(.rodata .rodata.*)
*libarch.a:*esp_efuse_api_key.*(.rodata .rodata.*)
*libarch.a:*log.*(.rodata .rodata.*)
*libarch.a:*log_noos.*(.rodata .rodata.*)
*libarch.a:*cpu_region_protect.*(.rodata .rodata.*)
*libarch.a:*mspi_timing_tuning.*(.rodata .rodata.*)
#ifdef CONFIG_ESP32S3_SPIRAM_MODE_QUAD
*libarch.a:esp32s3_psram_quad.*(.rodata .rodata.*)
#endif
#ifdef CONFIG_ESP32S3_SPIRAM_MODE_OCT
*libarch.a:esp32s3_psram_octal.*(.rodata .rodata.*)
#endif
. = ALIGN(4);
_edata = ABSOLUTE(.);
_data_end = ABSOLUTE(.);
/* Heap starts at the end of .data */
_sheap = ABSOLUTE(.);
} >dram0_0_seg AT>ROM
_image_drom_vma = ADDR(.flash.rodata);
_image_drom_lma = LOADADDR(.flash.rodata);
_image_drom_size = LOADADDR(.flash.rodata) + SIZEOF(.flash.rodata) - _image_drom_lma;
/* The alignment of the ".flash.rodata" output section is forced to
* 0x00010000 (64KB) to ensure that it will be allocated at the beginning
* of the next available Flash block.
* 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.
*/
.flash.rodata_dummy (NOLOAD) :
{
. = ALIGN(0x10000);
} > ROM
.flash.rodata :
{
_rodata_reserved_start = ABSOLUTE(.);
_srodata = ABSOLUTE(.);
*(EXCLUDE_FILE (esp32s3_start.*) .rodata)
*(EXCLUDE_FILE (esp32s3_start.*) .rodata.*)
*(.rodata)
*(.rodata.*)
#ifdef CONFIG_ESP32S3_WIRELESS
*(.rodata_wlog_verbose.*)
*(.rodata_wlog_debug.*)
*(.rodata_wlog_info.*)
*(.rodata_wlog_warning.*)
*(.rodata_wlog_error.*)
#endif
*(.irom1.text) /* catch stray ICACHE_RODATA_ATTR */
*(.gnu.linkonce.r.*)
*(.rodata1)
__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
*(.xt_except_table)
*(.gcc_except_table)
*(.gcc_except_table.*)
*(.gnu.linkonce.e.*)
*(.gnu.version_r)
*(.eh_frame)
. = ALIGN(4);
/* C++ constructor and destructor tables, properly ordered: */
_sinit = ABSOLUTE(.);
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
_einit = ABSOLUTE(.);
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .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)
_erodata = ABSOLUTE(.);
/* Literals are also RO data. */
_lit4_start = ABSOLUTE(.);
*(*.lit4)
*(.lit4.*)
*(.gnu.linkonce.lit4.*)
_lit4_end = ABSOLUTE(.);
. = ALIGN(4);
} >drom0_0_seg AT>ROM
.flash.rodata_noload (NOLOAD) :
{
/*
This is a symbol marking the flash.rodata end, this can be
used for mmu driver to maintain virtual address
We don't need to include the noload rodata in this section
*/
_rodata_reserved_end = ABSOLUTE(.);
. = ALIGN (4);
mapping[rodata_noload]
} >drom0_0_seg
_image_irom_vma = ADDR(.flash.text);
_image_irom_lma = LOADADDR(.flash.text);
_image_irom_size = LOADADDR(.flash.text) + SIZEOF(.flash.text) - _image_irom_lma;
.flash.text_dummy (NOLOAD) :
{
. += SIZEOF(.flash.rodata);
. = ALIGN(0x10000);
} >default_code_seg AT> ROM
.flash.text :
{
_stext = .;
_instruction_reserved_start = ABSOLUTE(.);
*(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.irom0.text) /* catch stray ICACHE_RODATA_ATTR */
*(.fini.literal)
*(.fini)
*(.gnu.version)
/* CPU will try to prefetch up to 16 bytes 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;
_instruction_reserved_end = ABSOLUTE(.);
_etext = .;
} >irom0_0_seg AT>ROM
/* Marks the end of IRAM code segment */
.iram0.text_end (NOLOAD) :
{
/* ESP32-S3 memprot requires 16B padding for possible CPU prefetch and
* 256B alignment for PMS split lines.
*/
. += 16;
. = ALIGN(256);
_iram_end = ABSOLUTE(.);
} >iram0_0_seg
.iram0.data :
{
. = ALIGN(4);
*(.iram.data)
*(.iram.data.*)
} >iram0_0_seg
.iram0.bss (NOLOAD) :
{
. = ALIGN(4);
*(.iram.bss)
*(.iram.bss.*)
. = ALIGN(4);
_iram_end = ABSOLUTE(.);
} >iram0_0_seg
.rtc.text :
{
. = ALIGN(4);
*(.rtc.literal .rtc.text)
} >rtc_iram_seg AT>ROM
/* RTC BSS section. */
.rtc.bss (NOLOAD) :
{
*(.rtc.bss)
} >rtc_slow_seg
.rtc.data :
{
. = ALIGN(4);
*(.rtc.data)
*(.rtc.data.*)
*(.rtc.rodata)
*(.rtc.rodata.*)
/* Whatever is left from the RTC memory is used as a special heap. */
. = ALIGN (4);
_srtcheap = ABSOLUTE(.);
} >rtc_slow_seg
/*
* This section holds RTC data that should have fixed addresses.
* The data are not initialized at power-up and are retained during deep sleep.
*/
.rtc_reserved (NOLOAD):
{
. = ALIGN(4);
_rtc_reserved_start = ABSOLUTE(.);
/* New data can only be added here to ensure existing data are not moved.
Because data have adhered to the end of the segment and code is relied on it.
>> put new data here << */
*(.rtc_timer_data_in_rtc_mem .rtc_timer_data_in_rtc_mem.*)
KEEP(*(.bootloader_data_rtc_mem .bootloader_data_rtc_mem.*))
_rtc_reserved_end = ABSOLUTE(.);
} > rtc_reserved_seg
}
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