149 lines
5.1 KiB
Plaintext
149 lines
5.1 KiB
Plaintext
/*
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GNU linker script for NRF52840 w/ s140 6.0.0 SoftDevice
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*/
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/* Specify the memory areas */
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x100000 /* entire flash, 1 MiB */
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/* nRF SoftDevice */
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FLASH_MBR (rx) : ORIGIN = ${MBR_START_ADDR}, LENGTH = ${MBR_SIZE}
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FLASH_SD (rx) : ORIGIN = ${SD_FLASH_START_ADDR}, LENGTH = ${SD_FLASH_SIZE}
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FLASH_ISR (rx) : ORIGIN = ${ISR_START_ADDR}, LENGTH = ${ISR_SIZE}
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FLASH_FIRMWARE (rx) : ORIGIN = ${CIRCUITPY_FIRMWARE_START_ADDR}, LENGTH = ${CIRCUITPY_FIRMWARE_SIZE}
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FLASH_BLE_CONFIG (r) : ORIGIN = ${CIRCUITPY_BLE_CONFIG_START_ADDR}, LENGTH = ${CIRCUITPY_BLE_CONFIG_SIZE}
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FLASH_NVM (r) : ORIGIN = ${CIRCUITPY_INTERNAL_NVM_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_NVM_SIZE}
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FLASH_FATFS (r) : ORIGIN = ${CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_START_ADDR}, LENGTH = ${CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_SIZE}
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FLASH_BOOTLOADER (rx) : ORIGIN = ${BOOTLOADER_START_ADDR}, LENGTH = ${BOOTLOADER_SIZE}
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FLASH_BOOTLOADER_SETTINGS (r) : ORIGIN = ${BOOTLOADER_SETTINGS_START_ADDR}, LENGTH = ${BOOTLOADER_SETTINGS_SIZE}
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/* 0x2000000 - RAM:ORIGIN is reserved for Softdevice */
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/* SoftDevice 6.1.0 with 5 connections and various increases takes just under 64kiB.
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/* To measure the minimum required amount of memory for given configuration, set this number
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high enough to work and then check the mutation of the value done by sd_ble_enable. */
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SPIM3_RAM (rw) : ORIGIN = 0x20000000 + ${SOFTDEVICE_RAM_SIZE}, LENGTH = ${SPIM3_BUFFER_SIZE}
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RAM (xrw) : ORIGIN = 0x20000000 + ${SOFTDEVICE_RAM_SIZE} + ${SPIM3_BUFFER_SIZE}, LENGTH = 256K - ${SOFTDEVICE_RAM_SIZE} -${SPIM3_BUFFER_SIZE}
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}
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/* produce a link error if there is not this amount of RAM available */
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_minimum_heap_size = 0;
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/* top end of the stack */
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/*_stack_end = ORIGIN(RAM) + LENGTH(RAM);*/
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_estack = ORIGIN(RAM) + LENGTH(RAM);
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/* RAM extents for the garbage collector */
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_ram_end = ORIGIN(RAM) + LENGTH(RAM);
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_heap_end = 0x20020000; /* tunable */
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/* nrf52840 SPIM3 needs its own area to work around hardware problems. Nothing else may use this space. */
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_spim3_ram = ORIGIN(SPIM3_RAM);
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_spim3_ram_end = ORIGIN(SPIM3_RAM) + LENGTH(RAM);
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/* define output sections */
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SECTIONS
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{
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/* The startup code goes first into FLASH */
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.isr_vector :
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{
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. = ALIGN(4);
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KEEP(*(.isr_vector)) /* Startup code */
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. = ALIGN(4);
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} >FLASH_ISR
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/* The program code and other data goes into FLASH */
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.text :
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{
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. = ALIGN(4);
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*(.text) /* .text sections (code) */
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*(.text*) /* .text* sections (code) */
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*(.rodata) /* .rodata sections (constants, strings, etc.) */
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*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
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/* *(.glue_7) */ /* glue arm to thumb code */
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/* *(.glue_7t) */ /* glue thumb to arm code */
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. = ALIGN(4);
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_etext = .; /* define a global symbol at end of code */
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} >FLASH_FIRMWARE
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/*
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.ARM.extab :
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{
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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} >FLASH_FIRMWARE
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.ARM :
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{
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__exidx_start = .;
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*(.ARM.exidx*)
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__exidx_end = .;
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} >FLASH_FIRMWARE
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*/
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/* used by the startup to initialize data */
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_sidata = .;
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/* This is the initialized data section
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The program executes knowing that the data is in the RAM
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but the loader puts the initial values in the FLASH (inidata).
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It is one task of the startup to copy the initial values from FLASH to RAM. */
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.data : AT (_sidata)
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{
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. = ALIGN(4);
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_sdata = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */
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_ram_start = .; /* create a global symbol at ram start for garbage collector */
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*(.data) /* .data sections */
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*(.data*) /* .data* sections */
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. = ALIGN(4);
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_edata = .; /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */
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} >RAM
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/* Uninitialized data section */
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.bss :
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{
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. = ALIGN(4);
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_sbss = .; /* define a global symbol at bss start; used by startup code */
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*(.bss)
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .; /* define a global symbol at bss end; used by startup code and GC */
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} >RAM
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/* this is to define the start of the heap, and make sure we have a minimum size */
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.heap :
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{
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. = ALIGN(4);
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PROVIDE ( end = . );
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PROVIDE ( _end = . );
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_heap_start = .; /* define a global symbol at heap start */
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. = . + _minimum_heap_size;
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} >RAM
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/* this just checks there is enough RAM for the stack */
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.stack :
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{
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. = ALIGN(4);
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. = . + ${CIRCUITPY_DEFAULT_STACK_SIZE};
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. = ALIGN(4);
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} >RAM
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/* Remove information from the standard libraries */
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/*
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/DISCARD/ :
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{
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libc.a ( * )
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libm.a ( * )
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libgcc.a ( * )
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}
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*/
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.ARM.attributes 0 : { *(.ARM.attributes) }
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}
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