/*
 * Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/devicetree.h>
#include <zephyr/linker/sections.h>
#include <zephyr/linker/linker-defs.h>
#include <zephyr/linker/linker-tool.h>

#define SRAM_IRAM_START     0x40370000
#define SRAM_DIRAM_I_START  0x40378000
#define SRAM_IRAM_END       0x403BA000
#define I_D_SRAM_OFFSET     (SRAM_DIRAM_I_START - SRAM_DRAM_START)

#define SRAM_DRAM_START     0x3FC88000
#define SRAM_DRAM_END       (SRAM_IRAM_END - I_D_SRAM_OFFSET)

#define IRAM_REGION iram0_0_seg
#define RAMABLE_REGION dram0_0_seg
#define ROMABLE_REGION iram0_0_seg

#define IROM_SEG_ALIGN 0x4

MEMORY
{
  iram0_0_seg(RX): org = SRAM_IRAM_END - CONFIG_ESP32S3_APPCPU_IRAM, len = CONFIG_ESP32S3_APPCPU_IRAM
  dram0_0_seg(RW): org = SRAM_DRAM_END - CONFIG_ESP32S3_APPCPU_DRAM, len = CONFIG_ESP32S3_APPCPU_DRAM
#ifdef CONFIG_GEN_ISR_TABLES
  IDT_LIST(RW): org = 0x3ebfe010, len = 0x2000
#endif
}

/*  Default entry point:  */
ENTRY(__app_cpu_start)

SECTIONS
{
  #include <zephyr/linker/rel-sections.ld>

   /* Send .iram0 code to iram */
  .iram0.vectors : ALIGN(4)
  {
    /* 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(*(.WindowVectors.text));
    . = 0x180;
    KEEP(*(.Level2InterruptVector.text));
    . = 0x1c0;
    KEEP(*(.Level3InterruptVector.text));
    . = 0x200;
    KEEP(*(.Level4InterruptVector.text));
    . = 0x240;
    KEEP(*(.Level5InterruptVector.text));
    . = 0x280;
    KEEP(*(.DebugExceptionVector.text));
    . = 0x2c0;
    KEEP(*(.NMIExceptionVector.text));
    . = 0x300;
    KEEP(*(.KernelExceptionVector.text));
    . = 0x340;
    KEEP(*(.UserExceptionVector.text));
    . = 0x3C0;
    KEEP(*(.DoubleExceptionVector.text));
    . = 0x400;
    _invalid_pc_placeholder = ABSOLUTE(.);
    *(.*Vector.literal)

    *(.UserEnter.literal);
    *(.UserEnter.text);
    . = ALIGN (16);
    *(.entry.text)
    *(.init.literal)
    *(.init)
	. = ALIGN (4);
    _init_end = ABSOLUTE(.);

    _iram_start = ABSOLUTE(.);
  } GROUP_LINK_IN(IRAM_REGION)

  SECTION_PROLOGUE(_TEXT_SECTION_NAME, , ALIGN(4))
  {
    /* Code marked as running out of IRAM */
    _iram_text_start = ABSOLUTE(.);
    *(.iram1 .iram1.*)
    *(.iram0.literal .iram.literal .iram.text.literal .iram0.text .iram.text)
    *libesp32.a:panic.*(.literal .text .literal.* .text.*)
    *librtc.a:(.literal .text .literal.* .text.*)
    *libarch__xtensa__core.a:(.literal .text .literal.* .text.*)
    *libkernel.a:(.literal .text .literal.* .text.*)
    *libsoc.a:rtc_*.*(.literal .text .literal.* .text.*)
    *libsoc.a:cpu_util.*(.literal .text .literal.* .text.*)
    *libgcc.a:lib2funcs.*(.literal .text .literal.* .text.*)
    *libdrivers__flash.a:flash_esp32.*(.literal .text .literal.* .text.*)
    *libzephyr.a:windowspill_asm.*(.literal .text .literal.* .text.*)
    *libzephyr.a:log_noos.*(.literal .text .literal.* .text.*)
    *libdrivers__timer.a:xtensa_sys_timer.*(.literal .text .literal.* .text.*)
    *libzephyr.a:systimer_hal.*(.literal .text .literal.* .text.*)
    *libzephyr.a:log_core.*(.literal .text .literal.* .text.*)
    *libzephyr.a:cbprintf_complete.*(.literal .text .literal.* .text.*)
    *libzephyr.a:printk.*(.literal.printk .literal.vprintk .literal.char_out .text.printk .text.vprintk .text.char_out)
    *libzephyr.a:log_msg.*(.literal .text .literal.* .text.*)
    *libzephyr.a:log_list.*(.literal .text .literal.* .text.*)
    *libdrivers__console.a:uart_console.*(.literal.console_out .text.console_out)
    *libzephyr.a:log_output.*(.literal .text .literal.* .text.*)
    *libzephyr.a:log_backend_uart.*(.literal .text .literal.* .text.*)
    *libzephyr.a:loader.*(.literal .text .literal.* .text.*)
    *liblib__libc__minimal.a:string.*(.literal .text .literal.* .text.*)
    *liblib__libc__newlib.a:string.*(.literal .text .literal.* .text.*)
    *libc.a:*(.literal .text .literal.* .text.*)
    *libphy.a:(.phyiram .phyiram.*)
    *libgcov.a:(.literal .text .literal.* .text.*)

    . = ALIGN(4);
    _iram_end = ABSOLUTE(.);
    . = ALIGN(4) + 16;

  } GROUP_LINK_IN(IRAM_REGION)

  SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)
  {
    _rodata_start = ABSOLUTE(.);

    *(.rodata_desc .rodata_desc.*)               /* Should be the first.  App version info.        DO NOT PUT ANYTHING BEFORE IT! */
    *(.rodata_custom_desc .rodata_custom_desc.*) /* Should be the second. Custom app version info. DO NOT PUT ANYTHING BEFORE IT! */

    __rodata_region_start = ABSOLUTE(.);
    . = ALIGN(4);
    #include <snippets-rodata.ld>

    . = ALIGN(4);
    *(EXCLUDE_FILE (*libarch__xtensa__core.a:* *libkernel.a:fatal.* *libkernel.a:init.* *libzephyr.a:cbprintf_complete* *libzephyr.a:log_core.* *libzephyr.a:log_backend_uart.* *libzephyr.a:log_output.* *libzephyr.a:loader.* *libdrivers__serial.a:uart_esp32.*) .rodata)
    *(EXCLUDE_FILE (*libarch__xtensa__core.a:* *libkernel.a:fatal.* *libkernel.a:init.* *libzephyr.a:cbprintf_complete* *libzephyr.a:log_core.* *libzephyr.a:log_backend_uart.* *libzephyr.a:log_output.* *libzephyr.a:loader.* *libdrivers__serial.a:uart_esp32.*) .rodata.*)

    *(.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)
    . = (. + 3) & ~ 3;
    __eh_frame = ABSOLUTE(.);
    KEEP(*(.eh_frame))
    . = (. + 7) & ~ 3;

    /*  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)
    . = ALIGN(4);
    __rodata_region_end = ABSOLUTE(.);
    /* Literals are also RO data. */
    _lit4_start = ABSOLUTE(.);
    *(*.lit4)
    *(.lit4.*)
    *(.gnu.linkonce.lit4.*)
    _lit4_end = ABSOLUTE(.);
    . = ALIGN(4);
    _thread_local_start = ABSOLUTE(.);
    *(.tdata)
    *(.tdata.*)
    *(.tbss)
    *(.tbss.*)
    *(.rodata_wlog)
    *(.rodata_wlog*)
    _thread_local_end = ABSOLUTE(.);
    _rodata_reserved_end = ABSOLUTE(.);
    . = ALIGN(4);
  } GROUP_DATA_LINK_IN(RAMABLE_REGION, IRAM_REGION)

  /* Flash segments (rodata and text) should be mapped in virtual address space by providing VMA.
   * Executing directly from LMA is not possible. */
  #pragma push_macro("GROUP_ROM_LINK_IN")
  #undef GROUP_ROM_LINK_IN
  #define GROUP_ROM_LINK_IN(vregion, lregion) > RAMABLE_REGION AT > lregion
  #include <zephyr/linker/common-rom/common-rom-cpp.ld>
  #include <zephyr/linker/common-rom/common-rom-kernel-devices.ld>
  #include <zephyr/linker/common-rom/common-rom-ztest.ld>
  #include <zephyr/linker/common-rom/common-rom-net.ld>
  #include <zephyr/linker/common-rom/common-rom-bt.ld>
  #include <zephyr/linker/common-rom/common-rom-debug.ld>
  #include <zephyr/linker/common-rom/common-rom-misc.ld>
  #pragma pop_macro("GROUP_ROM_LINK_IN")

  /* Create an explicit section at the end of all the data that shall be mapped into drom.
   * This is used to calculate the size of the _image_drom_size variable */
  SECTION_PROLOGUE(_RODATA_SECTION_END,,)
  {
    . = ALIGN(16);
    _image_rodata_end = ABSOLUTE(.);
  } GROUP_DATA_LINK_IN(RAMABLE_REGION, IRAM_REGION)

#include <snippets-sections.ld>

  .dram0.data :
  {
    . = ALIGN (8);
    __data_start = ABSOLUTE(.);

    *(.data)
    *(.data.*)
    *(.gnu.linkonce.d.*)
    *(.data1)
    *(.sdata)
    *(.sdata.*)
    *(.gnu.linkonce.s.*)
    *(.sdata2)
    *(.sdata2.*)
    *(.gnu.linkonce.s2.*)
    /* rodata for panic handler(libarch__xtensa__core.a) and all
     * dependent functions should be placed in DRAM to avoid issue
     * when flash cache is disabled */
    *libarch__xtensa__core.a:(.rodata .rodata.*)
    *libkernel.a:fatal.*(.rodata .rodata.*)
    *libkernel.a:init.*(.rodata .rodata.*)
    *libzephyr.a:cbprintf_complete*(.rodata .rodata.*)
    *libzephyr.a:systimer_hal.*(.rodata .rodata.*)
    *libzephyr.a:log_core.*(.rodata .rodata.*)
    *libzephyr.a:log_backend_uart.*(.rodata .rodata.*)
    *libzephyr.a:log_output.*(.rodata .rodata.*)
    *libzephyr.a:loader.*(.rodata .rodata.*)
    *libdrivers__serial.a:uart_esp32.*(.rodata .rodata.*)
    *libdrivers__flash.a:flash_esp32.*(.rodata  .rodata.*)

    KEEP(*(.jcr))
    *(.dram1 .dram1.*)
    . = ALIGN(4);
  } GROUP_DATA_LINK_IN(RAMABLE_REGION, IRAM_REGION)

  #include <zephyr/linker/cplusplus-rom.ld>
  #include <snippets-data-sections.ld>
  #include <zephyr/linker/common-ram.ld>
  #include <snippets-ram-sections.ld>
  #include <zephyr/linker/cplusplus-ram.ld>

  /* logging sections should be placed in RAM area to avoid flash cache disabled issues */
  #pragma push_macro("GROUP_ROM_LINK_IN")
  #undef GROUP_ROM_LINK_IN
  #define GROUP_ROM_LINK_IN GROUP_DATA_LINK_IN
  #include <zephyr/linker/common-rom/common-rom-logging.ld>
  #pragma pop_macro("GROUP_ROM_LINK_IN")

  .dram0.end :
  {
    . = ALIGN(4);

    #include <snippets-rwdata.ld>

    . = ALIGN(4);
    _end = ABSOLUTE(.);
    _heap_sentry = .;
	. = ALIGN(4);
    __data_end = ABSOLUTE(.);
  } GROUP_DATA_LINK_IN(RAMABLE_REGION, IRAM_REGION)

  /* Shared RAM */
  SECTION_DATA_PROLOGUE(_BSS_SECTION_NAME,(NOLOAD),)
  {
    . = ALIGN (8);
    _bss_start = ABSOLUTE(.); /* required by bluetooth library */
    __bss_start = ABSOLUTE(.);

    *(.dynsbss)
    *(.sbss)
    *(.sbss.*)
    *(.gnu.linkonce.sb.*)
    *(.scommon)
    *(.sbss2)
    *(.sbss2.*)
    *(.gnu.linkonce.sb2.*)
    *(.dynbss)
    *(.bss)
    *(.bss.*)
    *(.share.mem)
    *(.gnu.linkonce.b.*)
    *(COMMON)
    . = ALIGN (8);
    __bss_end = ABSOLUTE(.);
  } GROUP_LINK_IN(RAMABLE_REGION)

  ASSERT(((__bss_end - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)), "DRAM segment data does not fit.")

  SECTION_DATA_PROLOGUE(_NOINIT_SECTION_NAME, (NOLOAD),)
  {
    . = ALIGN(8);
    *(.noinit)
    *(.noinit.*)
    . = ALIGN(8) ;
  } GROUP_LINK_IN(RAMABLE_REGION)

  .flash.text : ALIGN(IROM_SEG_ALIGN)
  {
    _stext = .;
    _text_start = ABSOLUTE(.);

    *(.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)
    *(.literal .text .literal.* .text.*)

    /* 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 = .;

    /* Similar to _iram_start, this symbol goes here so it is
     * resolved by addr2line in preference to the first symbol in
     * the flash.text segment.
     */
	 . = ALIGN(4);
    _flash_cache_start = ABSOLUTE(0);
  } GROUP_LINK_IN(IRAM_REGION)

#ifdef CONFIG_GEN_ISR_TABLES
#include <zephyr/linker/intlist.ld>
#endif

#include <zephyr/linker/debug-sections.ld>

  .xtensa.info  0 :  { *(.xtensa.info) }
  .xt.insn 0 :
  {
    KEEP (*(.xt.insn))
    KEEP (*(.gnu.linkonce.x.*))
  }
  .xt.prop 0 :
  {
    KEEP (*(.xt.prop))
    KEEP (*(.xt.prop.*))
    KEEP (*(.gnu.linkonce.prop.*))
  }
  .xt.lit 0 :
  {
    KEEP (*(.xt.lit))
    KEEP (*(.xt.lit.*))
    KEEP (*(.gnu.linkonce.p.*))
  }
  .xt.profile_range 0 :
  {
    KEEP (*(.xt.profile_range))
    KEEP (*(.gnu.linkonce.profile_range.*))
  }
  .xt.profile_ranges 0 :
  {
    KEEP (*(.xt.profile_ranges))
    KEEP (*(.gnu.linkonce.xt.profile_ranges.*))
  }
  .xt.profile_files 0 :
  {
    KEEP (*(.xt.profile_files))
    KEEP (*(.gnu.linkonce.xt.profile_files.*))
  }

}

ASSERT(((_iram_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)),
          "IRAM0 segment data does not fit.")