diff --git a/embedded-examples/stm32h7-rtic/memory.x b/embedded-examples/stm32h7-rtic/memory.x index a76c320..76ce2ce 100644 --- a/embedded-examples/stm32h7-rtic/memory.x +++ b/embedded-examples/stm32h7-rtic/memory.x @@ -1,4 +1,119 @@ -MEMORY { - FLASH : ORIGIN = 0x08000000, LENGTH = 512K - RAM : ORIGIN = 0x20000000, LENGTH = 64K +/* Taken from https://github.com/stm32-rs/stm32h7xx-hal/pull/299, adapted slightly to work with */ +/* flip-link */ +MEMORY +{ + /* This file is intended for parts in the STM32H743/743v/753/753v families (RM0433), */ + /* with the exception of the STM32H742/742v parts which have a different RAM layout. */ + /* - FLASH and RAM are mandatory memory sections. */ + /* - The sum of all non-FLASH sections must add to 1060K total device RAM. */ + /* - The FLASH section size must match your device, see table below. */ + + /* FLASH */ + /* Flash is divided in two independent banks (except 750xB). */ + /* Select the appropriate FLASH size for your device. */ + /* - STM32H750xB 128K (only FLASH1) */ + /* - STM32H750xB 1M (512K + 512K) */ + /* - STM32H743xI/753xI 2M ( 1M + 1M) */ + FLASH1 : ORIGIN = 0x08000000, LENGTH = 1M + FLASH2 : ORIGIN = 0x08100000, LENGTH = 1M + + /* Data TCM */ + /* - Two contiguous 64KB RAMs. */ + /* - Used for interrupt handlers, stacks and general RAM. */ + /* - Zero wait-states. */ + /* - The DTCM is taken as the origin of the base ram. (See below.) */ + /* This is also where the interrupt table and such will live, */ + /* which is required for deterministic performance. */ + /* Need a region called RAM */ + /* DTCM : ORIGIN = 0x20000000, LENGTH = 128K */ + RAM : ORIGIN = 0x20000000, LENGTH = 128K + + /* Instruction TCM */ + /* - Used for latency-critical interrupt handlers etc. */ + /* - Zero wait-states. */ + ITCM : ORIGIN = 0x00000000, LENGTH = 64K + + /* AXI SRAM */ + /* - AXISRAM is in D1 and accessible by all system masters except BDMA. */ + /* - Suitable for application data not stored in DTCM. */ + /* - Zero wait-states. */ + AXISRAM : ORIGIN = 0x24000000, LENGTH = 512K + + /* AHB SRAM */ + /* - SRAM1-3 are in D2 and accessible by all system masters except BDMA. */ + /* Suitable for use as DMA buffers. */ + /* - SRAM4 is in D3 and additionally accessible by the BDMA. Used for BDMA */ + /* buffers, for storing application data in lower-power modes. */ + /* - Zero wait-states. */ + SRAM1 : ORIGIN = 0x30000000, LENGTH = 128K + SRAM2 : ORIGIN = 0x30020000, LENGTH = 128K + SRAM3 : ORIGIN = 0x30040000, LENGTH = 32K + SRAM4 : ORIGIN = 0x38000000, LENGTH = 64K + + /* Backup SRAM */ + BSRAM : ORIGIN = 0x38800000, LENGTH = 4K } + +/* +/* Assign the memory regions defined above for use. */ +/* + +/* Provide the mandatory FLASH and RAM definitions for cortex-m-rt's linker script. */ +/* These do not work with flip-link */ +REGION_ALIAS(FLASH, FLASH1); +/* REGION_ALIAS(RAM, DTCM); */ + +/* The location of the stack can be overridden using the `_stack_start` symbol. */ +/* - Set the stack location at the end of RAM, using all remaining space. */ +_stack_start = ORIGIN(RAM) + LENGTH(RAM); + +/* The location of the .text section can be overridden using the */ +/* `_stext` symbol. By default it will place after .vector_table. */ +/* _stext = ORIGIN(FLASH) + 0x40c; */ + +/* Define sections for placing symbols into the extra memory regions above. */ +/* This makes them accessible from code. */ +/* - ITCM, DTCM and AXISRAM connect to a 64-bit wide bus -> align to 8 bytes. */ +/* - All other memories connect to a 32-bit wide bus -> align to 4 bytes. */ +SECTIONS { + .flash2 (NOLOAD) : ALIGN(4) { + *(.flash2 .flash2.*); + . = ALIGN(4); + } > FLASH2 + + .itcm (NOLOAD) : ALIGN(8) { + *(.itcm .itcm.*); + . = ALIGN(8); + } > ITCM + + .axisram (NOLOAD) : ALIGN(8) { + *(.axisram .axisram.*); + . = ALIGN(8); + } > AXISRAM + + .sram1 (NOLOAD) : ALIGN(8) { + *(.sram1 .sram1.*); + . = ALIGN(4); + } > SRAM1 + + .sram2 (NOLOAD) : ALIGN(8) { + *(.sram2 .sram2.*); + . = ALIGN(4); + } > SRAM2 + + .sram3 (NOLOAD) : ALIGN(4) { + *(.sram3 .sram3.*); + . = ALIGN(4); + } > SRAM3 + + .sram4 (NOLOAD) : ALIGN(4) { + *(.sram4 .sram4.*); + . = ALIGN(4); + } > SRAM4 + + .bsram (NOLOAD) : ALIGN(4) { + *(.bsram .bsram.*); + . = ALIGN(4); + } > BSRAM + +};