hw/h7rs: Update linker to put RTT in DTCM

Signed-off-by: HiFiPhile <admin@hifiphile.com>

hw/bsp/stm32h7rs/boards/stm32h7s3nucleo/board.cmake

@@ -1,9 +1,7 @@
 set(MCU_VARIANT stm32h7s3xx)
 set(JLINK_DEVICE stm32h7s3xx)
 
-set(LD_FILE_GNU ${CMAKE_CURRENT_LIST_DIR}/stm32h7s3xx_flash.ld)
 set(LD_FILE_Clang ${LD_FILE_GNU})
-set(LD_FILE_IAR ${CMAKE_CURRENT_LIST_DIR}/stm32h7s3xx_flash.icf)
 
 function(update_board TARGET)
   target_compile_definitions(${TARGET} PUBLIC

hw/bsp/stm32h7rs/boards/stm32h7s3nucleo/board.mk

@@ -7,10 +7,6 @@ JLINK_DEVICE = stm32h7s3xx
 # flash target using on-board stlink
 flash: flash-stlink
 
-# Linker
-LD_FILE_GCC = $(BOARD_PATH)/stm32h7s3xx_flash.ld
-LD_FILE_IAR = $(BOARD_PATH)/stm32h7s3xx_flash.icf
-
 SRC_C += \
 	$(ST_TCPP0203)/tcpp0203.c \
 	$(ST_TCPP0203)/tcpp0203_reg.c \

hw/bsp/stm32h7rs/family.cmake

@@ -54,11 +54,11 @@ function(add_board_target BOARD_TARGET)
   set(STARTUP_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/startup_${MCU_VARIANT}.s)
 
   if(NOT DEFINED LD_FILE_GNU)
-    set(LD_FILE_GNU ${ST_CMSIS}/Source/Templates/gcc/linker/${MCU_VARIANT}_flash.ld)
+    set(LD_FILE_GNU ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/linker/${MCU_VARIANT}_flash.ld)
   endif()
   set(LD_FILE_Clang ${LD_FILE_GNU})
   if(NOT DEFINED LD_FILE_IAR)
-    set(LD_FILE_IAR ${ST_CMSIS}/Source/Templates/iar/linker/${MCU_VARIANT}_flash.icf)
+    set(LD_FILE_IAR ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/linker/${MCU_VARIANT}_flash.icf)
   endif()
 
   add_library(${BOARD_TARGET} STATIC
@@ -87,8 +87,7 @@ function(add_board_target BOARD_TARGET)
     BOARD_TUD_MAX_SPEED=${RHPORT_DEVICE_SPEED}
     BOARD_TUH_RHPORT=${RHPORT_HOST}
     BOARD_TUH_MAX_SPEED=${RHPORT_HOST_SPEED}
-    SEGGER_RTT_SECTION="noncacheable_buffer"
-    BUFFER_SIZE_UP=0x3000
+    SEGGER_RTT_SECTION=\"dtcm_data\"
     )
 
   update_board(${BOARD_TARGET})

hw/bsp/stm32h7rs/family.mk

@@ -43,8 +43,7 @@ CFLAGS += \
 	-DBOARD_TUD_MAX_SPEED=${RHPORT_DEVICE_SPEED} \
 	-DBOARD_TUH_RHPORT=${RHPORT_HOST} \
 	-DBOARD_TUH_MAX_SPEED=${RHPORT_HOST_SPEED} \
-	-DSEGGER_RTT_SECTION=\"noncacheable_buffer\" \
-	-DBUFFER_SIZE_UP=0x3000 \
+	-DSEGGER_RTT_SECTION="dtcm_data" \
 
 # GCC Flags
 CFLAGS_GCC += \
@@ -91,5 +90,5 @@ SRC_S_GCC += $(ST_CMSIS)/Source/Templates/gcc/startup_$(MCU_VARIANT).s
 SRC_S_IAR += $(ST_CMSIS)/Source/Templates/iar/startup_$(MCU_VARIANT).s
 
 # Linker
-LD_FILE_GCC ?= $(ST_CMSIS)/Source/Templates/gcc/linker/$(MCU_VARIANT)_flash.ld
-LD_FILE_IAR ?= $(ST_CMSIS)/Source/Templates/iar/linker/$(MCU_VARIANT)_flash.icf
+LD_FILE_GCC ?= $(FAMILY_PATH)/linker/$(MCU_VARIANT)_flash.ld
+LD_FILE_IAR ?= $(FAMILY_PATH)/linker/$(MCU_VARIANT)_flash.icf

hw/bsp/stm32h7rs/linker/stm32h7s3xx_flash.icf

@@ -4,7 +4,7 @@
 /*-Specials-*/
 define symbol __ICFEDIT_intvec_start__ = 0x08000000;
 /*-Memory Regions-*/
-define symbol NONCACHEABLEBUFFER_size   = 0x4000;
+define symbol NONCACHEABLEBUFFER_size   = 0x400;
 define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
 define symbol __ICFEDIT_region_ROM_end__   = 0x0800FFFF;
 define symbol __ICFEDIT_region_RAM_start__ = 0x24000000;
@@ -14,7 +14,7 @@ define symbol NONCACHEABLEBUFFER_end       = __ICFEDIT_region_RAM_end__ + NONCAC
 
 
 /*-Sizes-*/
-define symbol __ICFEDIT_size_cstack__ = 0x800;
+define symbol __ICFEDIT_size_cstack__ = 0x400;
 define symbol __ICFEDIT_size_heap__   = 0x200;
 /**** End of ICF editor section. ###ICF###*/
 
@@ -51,5 +51,5 @@ place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
 
 place in ROM_region   { readonly };
 place in RAM_region   { readwrite };
+place in DTCM_region  { block CSTACK, block HEAP, section dtcm_data };
 place in NONCACHEABLE_region { section noncacheable_buffer };
-place in DTCM_region  { block CSTACK, block HEAP };

hw/bsp/stm32h7rs/linker/stm32h7s3xx_flash.ld

@@ -35,15 +35,19 @@
 /* Entry Point */
 ENTRY(Reset_Handler)
 
+/* Highest address of the user mode stack */
+_estack = ORIGIN(DTCM) + LENGTH(DTCM); /* end of "DTCM" Ram type memory */
+
 _Min_Heap_Size = 0x200; /* required amount of heap */
 _Min_Stack_Size = 0x400; /* required amount of stack */
 
 __FLASH_BEGIN  = 0x08000000;
 __FLASH_SIZE   = 0x00010000;
 
+
 __RAM_BEGIN    = 0x24000000;
 __RAM_SIZE     = 0x4FC00;
-__RAM_NONCACHEABLEBUFFER_SIZE = 0x4000;
+__RAM_NONCACHEABLEBUFFER_SIZE = 0x400;
 
 /* Memories definition */
 MEMORY
@@ -59,9 +63,6 @@ MEMORY
   FLASH     (xrw) : ORIGIN = __FLASH_BEGIN, LENGTH = __FLASH_SIZE
 }
 
-/* Highest address of the user mode stack */
-_estack = ORIGIN(DTCM) + LENGTH(DTCM); /* end of "DTCM" Ram type memory */
-
 /* Sections */
 SECTIONS
 {
@@ -99,14 +100,14 @@ SECTIONS
     . = ALIGN(4);
   } >FLASH
 
-  .ARM.extab :
+  .ARM.extab (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
   {
     . = ALIGN(4);
     *(.ARM.extab* .gnu.linkonce.armextab.*)
     . = ALIGN(4);
   } >FLASH
 
-  .ARM :
+  .ARM (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
    {
     . = ALIGN(4);
     __exidx_start = .;
@@ -115,7 +116,7 @@ SECTIONS
     . = ALIGN(4);
   } >FLASH
 
-  .preinit_array   :
+  .preinit_array  (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
   {
     . = ALIGN(4);
     PROVIDE_HIDDEN (__preinit_array_start = .);
@@ -124,7 +125,7 @@ SECTIONS
     . = ALIGN(4);
   } >FLASH
 
-  .init_array  :
+  .init_array (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
   {
     . = ALIGN(4);
     PROVIDE_HIDDEN (__init_array_start = .);
@@ -134,7 +135,7 @@ SECTIONS
     . = ALIGN(4);
   } >FLASH
 
-  .fini_array  :
+  .fini_array (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
   {
     . = ALIGN(4);
     PROVIDE_HIDDEN (__fini_array_start = .);
@@ -182,7 +183,7 @@ SECTIONS
   {
     __NONCACHEABLEBUFFER_BEGIN = .;/* create symbol for start of section */
     KEEP(*(noncacheable_buffer))
-    __NONCACHEABLEBUFFER_END = .;  /* create symbol for start of section */
+    __NONCACHEABLEBUFFER_END = .;  /* create symbol for end of section */
   } > RAM_NONCACHEABLEBUFFER
 
   /* User_heap_stack section, used to check that there is enough "DTCM" Ram  type memory left */
@@ -196,6 +197,11 @@ SECTIONS
     . = ALIGN(8);
   } >DTCM
 
+  .dtcm_data :
+  {
+    *(dtcm_data)
+  } >DTCM
+
   /* Remove information from the compiler libraries */
   /DISCARD/ :
   {