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micropython/ports/stm32/boards/stm32f439.ld

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stmhal: Add support for generic STM32F439 board (non DISCO).
2016-02-09 04:36:51 +00:00
/*
GNU linker script for STM32F439
*/
/* Specify the memory areas */
MEMORY
{
stm32/boards: Change linker scripts to use "K" instead of hex byte size.
2017-09-06 06:24:08 +01:00
FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 2048K /* entire flash */
FLASH_ISR (rx) : ORIGIN = 0x08000000, LENGTH = 16K /* sector 0 */
FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 896K /* sectors 5-11 are 128K */
FLASH_FS (rx) : ORIGIN = 0x08100000, LENGTH = 256K /* sectors 12-17 are 4*16K+64K+128K */
FLASH_FS2 (rx) : ORIGIN = 0x08140000, LENGTH = 128K /* sector 18 */
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 192K
CCMRAM (xrw) : ORIGIN = 0x10000000, LENGTH = 64K
stmhal: Add support for generic STM32F439 board (non DISCO).
2016-02-09 04:36:51 +00:00
}
/* produce a link error if there is not this amount of RAM for these sections */
_minimum_stack_size = 2K;
_minimum_heap_size = 16K;
stm32: In link script, define start of stack separately from heap end. Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
2019-05-14 15:43:38 +01:00
/* Define the stack. The stack is full descending so begins just above last byte
of RAM. Note that EABI requires the stack to be 8-byte aligned for a call. */
stm32: Enter bootloader via a system reset. Entering a bootloader (ST system bootloader, or custom mboot) from software by directly branching to it is not reliable, and the reliability of it working can depend on the peripherals that were enabled by the application code. It's also not possible to branch to a bootloader if the WDT is enabled (unless the bootloader has specific provisions to feed the WDT). This patch changes the way a bootloader is entered from software by first doing a complete system reset, then branching to the desired bootloader early on in the start-up process. The top two words of RAM (of the stack) are reserved to store flags indicating that the bootloader should be entered after a reset.
2019-06-22 12:26:03 +01:00
_estack = ORIGIN(RAM) + LENGTH(RAM) - _estack_reserve;
stm32: In link script, define start of stack separately from heap end. Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
2019-05-14 15:43:38 +01:00
_sstack = _estack - 16K; /* tunable */
stmhal: Add support for generic STM32F439 board (non DISCO).
2016-02-09 04:36:51 +00:00
/* RAM extents for the garbage collector */
stmhal: Put common definitions from linker files to common.ld.
2016-09-21 10:49:45 +01:00
_ram_start = ORIGIN(RAM);
stmhal: Add support for generic STM32F439 board (non DISCO).
2016-02-09 04:36:51 +00:00
_ram_end = ORIGIN(RAM) + LENGTH(RAM);
stmhal: Put common definitions from linker files to common.ld.
2016-09-21 10:49:45 +01:00
_heap_start = _ebss; /* heap starts just after statically allocated memory */
stm32: In link script, define start of stack separately from heap end. Previously the end of the heap was the start (lowest address) of the stack. With the changes in this commit these addresses are now independent, allowing a board to place the heap and stack in separate locations.
2019-05-14 15:43:38 +01:00
_heap_end = _sstack;