diff --git a/atmel-samd/boards/metro_m4_express/mpconfigboard.mk b/atmel-samd/boards/metro_m4_express/mpconfigboard.mk index a21be51389..8dfb07c508 100644 --- a/atmel-samd/boards/metro_m4_express/mpconfigboard.mk +++ b/atmel-samd/boards/metro_m4_express/mpconfigboard.mk @@ -1,4 +1,4 @@ -LD_FILE = boards/samd51x20.ld +LD_FILE = boards/samd51x20-bootloader.ld USB_VID = 0x239A USB_PID = 0x8015 diff --git a/atmel-samd/boards/samd51x20-bootloader.ld b/atmel-samd/boards/samd51x20-bootloader.ld new file mode 100644 index 0000000000..3d6621a5a9 --- /dev/null +++ b/atmel-samd/boards/samd51x20-bootloader.ld @@ -0,0 +1,81 @@ +/* + GNU linker script for SAMD51 +*/ + +/* Specify the memory areas */ +MEMORY +{ + FLASH (rx) : ORIGIN = 0x00000000 + 0x4000, LENGTH = 0x00100000 - 0x4000 - 0x80000 /* Leave 16KiB for the bootloader and 512k for the filesystem. */ + RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 0x00040000 /* 256 KiB */ +} + +/* top end of the stack */ +_estack = ORIGIN(RAM) + LENGTH(RAM); + +/* define output sections */ +SECTIONS +{ + /* The program code and other data goes into FLASH */ + .text : + { + . = ALIGN(4); + _sfixed = .; + KEEP(*(.vectors)) /* isr vector table */ + *(.text) /* .text sections (code) */ + *(.text*) /* .text* sections (code) */ + *(.rodata) /* .rodata sections (constants, strings, etc.) */ + *(.rodata*) /* .rodata* sections (constants, strings, etc.) */ + + . = ALIGN(4); + _etext = .; /* define a global symbol at end of code */ + } >FLASH + + .ARM.exidx : + { + *(.ARM.exidx*) + *(.gnu.linkonce.armexidx.*) + _sidata = .; /* This is used by the startup in order to initialize the .data section */ + } > FLASH + + /* This is the initialized data section + The program executes knowing that the data is in the RAM + but the loader puts the initial values in the FLASH (inidata). + It is one task of the startup to copy the initial values from FLASH to RAM. */ + .data : AT ( _sidata ) + { + . = ALIGN(4); + _srelocate = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */ + *(.ramfunc) + *(.ramfunc*) + *(.data) /* .data sections */ + *(.data*) /* .data* sections */ + + . = ALIGN(4); + _erelocate = .; /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */ + } >RAM + + /* Uninitialized data section */ + .bss : + { + . = ALIGN(4); + _sbss = .; + _szero = .; /* define a global symbol at bss start; used by startup code */ + *(.bss) + *(.bss*) + *(COMMON) + + . = ALIGN(4); + _ezero = .; /* define a global symbol at bss end; used by startup code */ + _ebss = .; + } >RAM + + /* this just checks there is enough RAM for a minimal stack */ + .stack : + { + . = ALIGN(4); + . = . + 0x800; /* Reserve a minimum of 2K for the stack. */ + . = ALIGN(4); + } >RAM + + .ARM.attributes 0 : { *(.ARM.attributes) } +} diff --git a/atmel-samd/boards/samd51x20.ld b/atmel-samd/boards/samd51x20.ld index 4d2da5d13d..ed26425f3f 100644 --- a/atmel-samd/boards/samd51x20.ld +++ b/atmel-samd/boards/samd51x20.ld @@ -5,7 +5,7 @@ /* Specify the memory areas */ MEMORY { - FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x00100000 - 0x80000 /* 1024 KiB mius 512KiB for the internal file system. */ + FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x00100000 - 0x80000 /* 1024 KiB minus 512KiB for the internal file system. */ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 0x00040000 /* 256 KiB */ }