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29 lines
1.2 KiB
Makefile
29 lines
1.2 KiB
Makefile
CPU_ARCH = cortex-m7
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CPU_FAM = stm32f7
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# STM32F7 uses sectors instead of pages, where the minimum sector length is 16KB or
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# 32kB (the first sector), depending on the CPU_MODEL. Therefore RIOTBOOT_LEN must
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# be 16KB or 32kB to cover a whole sector.
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ifneq (,$(filter stm32f722ze ,$(CPU_MODEL)))
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RIOTBOOT_LEN ?= 0x4000
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else
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RIOTBOOT_LEN ?= 0x8000
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endif
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# CPU_IRQ_NUMOF for STM32F7 boards is < 110+16 so (126*4 bytes = 504 bytes ~= 0x200)
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# RIOTBOOT_HDR_LEN can be set to 0x200.
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# Details on alignment requirements for M4 in `cpu/cortexm_common/Makefile.include`.
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RIOTBOOT_HDR_LEN ?= 0x200
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# Sectors don't have the same length. Per bank there can be up to 12 sectors. If
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# the smallest sector size is 16kb the first 4 sectors are 16kB long, the 5th is
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# 64kB and the remaining 7 are 128kB. Since flash can only be erased by sector,
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# slots can't overlap over sectors.
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# RIOTBOOT_LEN is removed twice, once at the start of the flash for the bootloader,
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# and a second time at the end of the flash, to get evenly sized and distributed slots.
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SLOT0_LEN ?= $(shell printf "0x%x" $$((($(ROM_LEN:%K=%*1024)-2*$(RIOTBOOT_LEN)) / $(NUM_SLOTS))))
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SLOT1_LEN ?= $(SLOT0_LEN)
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include $(RIOTCPU)/stm32_common/Makefile.include
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include $(RIOTMAKE)/arch/cortexm.inc.mk
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