/*
 *
 *    Copyright (c) 2022 Project CHIP Authors
 *
 *    Licensed 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.
 */

MEMORY
{
  ITCM (rx)       : ORIGIN = 0x00000000, LENGTH = 32K
  /* Vector table is copied to RAM, so RAM address needs to be adjusted */
  DTCM (rwx)      : ORIGIN = 0x20000000, LENGTH = 32K
  DATA_SRAM (rwx) : ORIGIN = 0x21000000, LENGTH = 2M
  QSPI_RAM (rx)   : ORIGIN = 0x28000000, LENGTH = 8M
}

__stack_size__ = 0x1000;

/* Library configurations */
GROUP(libgcc.a libc.a libm.a libnosys.a)

SECTIONS
{
    .vectors :
    {
        KEEP(*(.vectors))
        __Vectors_End = .;
        __Vectors_Size = __Vectors_End - __Vectors;
        __end__ = .;

        KEEP(*(.init))
        KEEP(*(.fini))

        /* .ctors */
        *crtbegin.o(.ctors)
        *crtbegin?.o(.ctors)
        *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
        *(SORT(.ctors.*))
        *(.ctors)
    } > ITCM

    .text :
    {
        *(.text*)
        
        /* .dtors */
         *crtbegin.o(.dtors)
         *crtbegin?.o(.dtors)
         *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
         *(SORT(.dtors.*))
         *(.dtors)

        *(.rodata*)

        KEEP(*(.eh_frame*))
    } > QSPI_RAM

    .ARM.extab :
    {
        *(.ARM.extab* .gnu.linkonce.armextab.*)
    } > QSPI_RAM

    __exidx_start = .;

    .ARM.exidx :
    {
        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
    } > QSPI_RAM

    __exidx_end = .;

    /* To copy multiple ROM to RAM sections,
     * define etext2/data2_start/data2_end */
    .copy.table :
    {
        . = ALIGN(4);
        __copy_table_start__ = .;
        LONG (__etext)
        LONG (__data_start__)
        LONG (__data_end__ - __data_start__)
        LONG (DEFINED(__etext2) ? __etext2 : 0)
        LONG (DEFINED(__data2_start__) ? __data2_start__ : 0)
        LONG (DEFINED(__data2_start__) ? __data2_end__ - __data2_start__ : 0)
        __copy_table_end__ = .;
    } > QSPI_RAM

    .zero.table :
    {
        . = ALIGN(4);
        __zero_table_start__ = .;
        LONG (__bss_start__)
        LONG (__bss_end__ - __bss_start__)
        LONG (DEFINED(__bss2_start__) ? __bss2_start__ : 0)
        LONG (DEFINED(__bss2_start__) ? __bss2_end__ - __bss2_start__ : 0)
        __zero_table_end__ = .;
    } > QSPI_RAM

    __etext = .;

    .data : AT (__etext)
    {
        __data_start__ = .;
        *(vtable)
        *(.data*)

        . = ALIGN(4);
        /* preinit data */
        PROVIDE_HIDDEN (__preinit_array_start = .);
        KEEP(*(.preinit_array))
        PROVIDE_HIDDEN (__preinit_array_end = .);

        . = ALIGN(4);
        /* init data */
        PROVIDE_HIDDEN (__init_array_start = .);
        KEEP(*(SORT(.init_array.*)))
        KEEP(*(.init_array))
        PROVIDE_HIDDEN (__init_array_end = .);

        . = ALIGN(4);
        /* finit data */
        PROVIDE_HIDDEN (__fini_array_start = .);
        KEEP(*(SORT(.fini_array.*)))
        KEEP(*(.fini_array))
        PROVIDE_HIDDEN (__fini_array_end = .);

        KEEP(*(.jcr*))
        . = ALIGN(4);
        /* All data end */
        __data_end__ = .;
    } > DATA_SRAM

    .bss :
    {
        . = ALIGN(4);
        __bss_start__ = .;
        *(.bss*)
        *(COMMON)
        . = ALIGN(4);
        __bss_end__ = .;
    } > DATA_SRAM

    bss_size = __bss_end__ - __bss_start__;

    .stack :
    {
        . = ALIGN(8);
        __StackLimit = .;
        KEEP(*(.stack*))
        . += __stack_size__;
        __StackTop = .;
    } > DTCM
    PROVIDE(__stack = __StackTop);

    .heap (COPY):
    {
        . = ALIGN(8);
        __HeapBase = .;
        __end__ = .;
        end = __end__;
        KEEP(*(.heap*))
        . += (ORIGIN(DATA_SRAM) + LENGTH(DATA_SRAM) - .);
        __HeapLimit = .;
        __heap_limit = .;
    } > DATA_SRAM

    ASSERT(__StackTop <= (ORIGIN(DTCM) + LENGTH(DTCM)), "RAM region overflowed")
}