Linker poc

Kconfig.zephyr

@@ -194,6 +194,14 @@ config LINKER_SORT_BY_ALIGNMENT
 	  in decreasing size of symbols. This helps to minimize
 	  padding between symbols.
 
+config VECT_REGION
+	bool "vector table specific allocation"
+	default n
+	help
+	  used to specify a specific memory region for the vector table.
+	  this can be used to split the memories region for code and vector
+	  table.
+
 endmenu
 
 menu "Compiler Options"

arch/Kconfig

@@ -117,6 +117,25 @@ config FLASH_BASE_ADDRESS
 	  normally set by the board's defconfig file and the user should generally
 	  avoid modifying it via the menu configuration.
 
+config VECT_BASE_ADDRESS
+	hex "physical memory address"
+	default 0
+	depends on VECT_REGION
+	help
+	  This option specifies address of the memory region to define for the 
+	  vector table.
+	  If unsure, leave at the default value 0.
+
+config VECT_SIZE
+	hex "vector table size"
+	default 0
+	depends on VECT_REGION
+	help
+	  This option specifies the size of the  memory region to reseved for
+	  the vector table. This value suould be higher tthan the vector table
+	  size.
+	  If unsure, leave at the default value 0.
+
 endif # ARM || ARC || NIOS2 || X86
 
 if ARCH_HAS_TRUSTED_EXECUTION

boards/arm/stm32mp157c_dk2/stm32mp157c_dk2.dts

@@ -11,7 +11,7 @@
 	model = "STMicroelectronics STM32MP157-DK2  board";
 	compatible = "st,stm32mp157c-dk2", "st,stm32mp15";
 	chosen {
-		zephyr,flash = &retram;
-		zephyr,sram = &mcusram;
+		zephyr,flash = &mcusramcode;
+		zephyr,sram = &mcusramdata;
 	};
 };

boards/arm/stm32mp157c_dk2/stm32mp157c_dk2_defconfig

@@ -16,3 +16,6 @@ CONFIG_CLOCK_CONTROL=y
 CONFIG_CONSOLE=y
 CONFIG_RAM_CONSOLE=y
 CONFIG_RAM_CONSOLE_BUFFER_SIZE=1024
+
+CONFIG_VECT_REGION=y
+CONFIG_VECT_SIZE=0x300

dts/arm/st/mp1/stm32mp157.dtsi

@@ -21,15 +21,35 @@
 		};
 	};
 
-	retram: memory0@0 {
+	vecttab: memory0@0 {
 		device_type = "memory";
 		compatible = "mmio-sram";
-		reg = <0x00000000 DT_SIZE_K(64)>;
+		reg = <0x00000000 0x300>;
 	};
-	mcusram: memory1@10000000 {
+	retram: memory1@300 {
 		device_type = "memory";
 		compatible = "mmio-sram";
-		reg = <0x10000000 DT_SIZE_K(256)>;
+		reg = <0x00000300 0xFD00>;
+	};
+	mcusramcode: memory2@10000000 {
+		device_type = "memory";
+		compatible = "mmio-sram";
+		reg = <0x10000000 0x30000>;
+	};
+	mcusramdata: memory3@10030000 {
+		device_type = "memory";
+		compatible = "mmio-sram";
+		reg = <0x10030000 0x10000>;
+	};
+	mcusram3: memory4@10040000 {
+		device_type = "memory";
+		compatible = "mmio-sram";
+		reg = <0x10040000 0x10000>;
+	};
+	mcusram4: memory5@10050000 {
+		device_type = "memory";
+		compatible = "mmio-sram";
+		reg = <0x10050000 0x10000>;
 	};
 
 	soc {

include/arch/arm/cortex_m/scripts/linker.ld

@@ -23,9 +23,15 @@
 
 /* physical address of RAM */
 #ifdef CONFIG_XIP
+#ifdef CONFIG_VECT_REGION
+  #define VECT_REGION    VECT
+#endif
   #define ROMABLE_REGION FLASH
   #define RAMABLE_REGION SRAM
 #else
+#ifdef CONFIG_VECT_REGION
+  #define VECT_REGION    VECT
+#endif
   #define ROMABLE_REGION SRAM
   #define RAMABLE_REGION SRAM
 #endif
@@ -40,6 +46,11 @@
   #define SKIP_TO_KINETIS_FLASH_CONFIG
 #endif
 
+#ifdef CONFIG_VECT_REGION
+  #define VECT_ADDR CONFIG_VECT_BASE_ADDRESS
+  #define VECT_SIZE CONFIG_VECT_SIZE
+#endif
+
 #define ROM_ADDR (CONFIG_FLASH_BASE_ADDRESS + CONFIG_FLASH_LOAD_OFFSET)
 #ifdef CONFIG_TI_CCFG_PRESENT
   #define CCFG_SIZE 88
@@ -89,6 +100,9 @@ _region_min_align = 4;
 
 MEMORY
     {
+#ifdef CONFIG_VECT_REGION
+    VECT      	  	  (rx) : ORIGIN = VECT_ADDR, LENGTH = VECT_SIZE
+#endif
     FLASH                 (rx) : ORIGIN = ROM_ADDR, LENGTH = ROM_SIZE
 #ifdef CONFIG_TI_CCFG_PRESENT
     FLASH_CCFG            (rwx): ORIGIN = CCFG_ADDR, LENGTH = CCFG_SIZE
@@ -123,9 +137,12 @@ SECTIONS
 	*(.iplt)
 	}
 
+#ifdef CONFIG_VECT_REGION
+    GROUP_START(VECT_REGION)
+#else
     GROUP_START(ROMABLE_REGION)
-
 	_image_rom_start = ROM_ADDR;
+#endif
 
     SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
 	{
@@ -172,7 +189,18 @@ SECTIONS
 	KEEP(*(".kinetis_flash_config.*"))
 
 	_vector_end = .;
+
+#ifdef CONFIG_VECT_REGION
+	} GROUP_LINK_IN(VECT_REGION)
+
+GROUP_END(VECT_REGION)
+
+GROUP_START(ROMABLE_REGION)
+
+	_image_rom_start = ROM_ADDR;
+#else
 	} GROUP_LINK_IN(ROMABLE_REGION)
+#endif
 
 #ifdef CONFIG_CODE_DATA_RELOCATION