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micropython/ports/stm32/mboot/stm32_memory.ld

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stm32/mboot: Allow a board to customise the linker scripts. A board can now define MBOOT_LD_FILES (at the Makefile-level) to specify custom linker scripts. And stm32_generic.ld has been split into 2 pieces so one or the other can be reused (usually stm32_sections.ld wolud be reused by a board, and stm32_memory.ld redefined). Signed-off-by: Damien George <damien@micropython.org>
2021-04-28 06:26:20 +00:00
/*
Linker script fragment for mboot on an STM32xxx MCU.
This defines the memory sections for the bootloader to use.
*/
MEMORY
{
FLASH_BL (rx) : ORIGIN = 0x08000000, LENGTH = 32K
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 120K
}
stm32/mboot: Make all mboot sectors erase/write protected. Prior to this commit, only sector 0 was erase/write protected, which may not be enough to protect all of mboot (especially if mboot lives at a higher address than the start of flash). This commit makes sure all internal flash sectors that mboot lives in are protected from erasing and writing. The linker script must define _mboot_writable_flash_start for this to work. Signed-off-by: Damien George <damien@micropython.org>
2022-11-23 10:41:48 +00:00
/* Location from which mboot is allowed to write to flash.
Must be the start of a flash erase sector. */
_mboot_writable_flash_start = ORIGIN(FLASH_BL) + LENGTH(FLASH_BL);