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circuitpython/ports/nrf/boards/memory.ld

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nrf: Make linker scripts more modular. With all the variation in chips and boards it's tedious to copy and redefine linker scripts for every option. Making linker scripts more modular also opens up more possibilities, like enabling/disabling the flash file system from the Makefile - or even defining it's size from a Makefile argument (FS_SIZE=12 for a 12kB filesystem if tight on space).
2018-04-02 11:43:11 -04:00
nrf/boards: Update memory.ld to include bootloader offsets. Adding variables that can be set from other linker scripts: - _bootloader_head_size: Bootloader flash offset in front of the application. - _bootloader_tail_size: Bootloader offset from the tail of the flash. In case the bootloader is located at the end. - _bootloader_head_ram_size: Bootloader RAM usage in front of the application. Updated calculations of application flash and RAM.
2020-07-16 16:19:19 -04:00
/* Flash layout: bootloader_head | softdevice | application | filesystem | bootloader_tail */
/* RAM layout: bootloader RAM | softdevice RAM | application RAM */
_bootloader_head_size = DEFINED(_bootloader_head_size) ? _bootloader_head_size : 0;
_bootloader_tail_size = DEFINED(_bootloader_tail_size) ? _bootloader_tail_size : 0;
_bootloader_head_ram_size = DEFINED(_bootloader_head_ram_size) ? _bootloader_head_ram_size : 0;
_head_size = DEFINED(_sd_size) ? _sd_size : _bootloader_head_size;
_head_ram = DEFINED(_sd_ram) ? _sd_ram : _bootloader_head_ram_size;
_sd_size = DEFINED(_sd_size) ? _sd_size : 0;
nrf: Make linker scripts more modular. With all the variation in chips and boards it's tedious to copy and redefine linker scripts for every option. Making linker scripts more modular also opens up more possibilities, like enabling/disabling the flash file system from the Makefile - or even defining it's size from a Makefile argument (FS_SIZE=12 for a 12kB filesystem if tight on space).
2018-04-02 11:43:11 -04:00
_sd_ram = DEFINED(_sd_ram) ? _sd_ram : 0;
_fs_size = DEFINED(_fs_size) ? _fs_size : 64K; /* TODO: set to 0 if not using the filesystem */
nrf/boards: Update memory.ld to include bootloader offsets. Adding variables that can be set from other linker scripts: - _bootloader_head_size: Bootloader flash offset in front of the application. - _bootloader_tail_size: Bootloader offset from the tail of the flash. In case the bootloader is located at the end. - _bootloader_head_ram_size: Bootloader RAM usage in front of the application. Updated calculations of application flash and RAM.
2020-07-16 16:19:19 -04:00
_app_size = _flash_size - _head_size - _fs_size - _bootloader_tail_size;
_app_start = _head_size;
_fs_start = _head_size + _app_size;
nrf: Make linker scripts more modular. With all the variation in chips and boards it's tedious to copy and redefine linker scripts for every option. Making linker scripts more modular also opens up more possibilities, like enabling/disabling the flash file system from the Makefile - or even defining it's size from a Makefile argument (FS_SIZE=12 for a 12kB filesystem if tight on space).
2018-04-02 11:43:11 -04:00
_fs_end = _fs_start + _fs_size;
nrf/boards: Update memory.ld to include bootloader offsets. Adding variables that can be set from other linker scripts: - _bootloader_head_size: Bootloader flash offset in front of the application. - _bootloader_tail_size: Bootloader offset from the tail of the flash. In case the bootloader is located at the end. - _bootloader_head_ram_size: Bootloader RAM usage in front of the application. Updated calculations of application flash and RAM.
2020-07-16 16:19:19 -04:00
_app_ram_start = 0x20000000 + _head_ram;
_app_ram_size = _ram_size - _head_ram;
nrf/boards: Check for stack/heap size using an assert. The main effect of this is that the .bss is now accurate and doesn't include the stack and minimum heap size.
2018-06-13 18:33:27 -04:00
_heap_start = _ebss;
_heap_end = _ram_end - _stack_size;
_heap_size = _heap_end - _heap_start;
ASSERT(_heap_size >= _minimum_heap_size, "not enough RAM left for heap")
nrf: Make linker scripts more modular. With all the variation in chips and boards it's tedious to copy and redefine linker scripts for every option. Making linker scripts more modular also opens up more possibilities, like enabling/disabling the flash file system from the Makefile - or even defining it's size from a Makefile argument (FS_SIZE=12 for a 12kB filesystem if tight on space).
2018-04-02 11:43:11 -04:00
/* Specify the memory areas */
MEMORY
{
FLASH_TEXT (rx) : ORIGIN = _app_start, LENGTH = _app_size /* app */
RAM (xrw) : ORIGIN = _app_ram_start, LENGTH = _app_ram_size
}
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