ARC: don't align ROM region end if not required (e1efafa3) · Commits · Wenxi XU / zephyr

This extra MPU alignment of RAMABLE_REGION is only required if we put ROMABLE_REGION and RAMABLE_REGION into the same (continuous) memory (i.e. SRAM) - so we won't get beginning of the RAMABLE_REGION in the end of ROMABLE_REGION MPU aperture. If we use different regions (ICCM & DCCM, FLASH & SRAM, etc...) we don't need this extra MPU alignment. Let's drop it to decrease ROM memory usage. Signed-off-by:

Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by:

Evgeniy Paltsev <PaltsevEvgeniy@gmail.com>

include/zephyr/arch/arc/v2/linker.ld

+9 −0

Original line number	Diff line number	Diff line
		@@ -17,13 +17,16 @@
		#ifdef CONFIG_HARVARD
		#define ROMABLE_REGION ICCM
		#define RAMABLE_REGION DCCM
		#define ROM_RAM_IN_SAME_REGION 0
		#else
		#if defined(CONFIG_XIP) && (FLASH_SIZE != 0)
		#define ROMABLE_REGION FLASH
		#define RAMABLE_REGION SRAM
		#define ROM_RAM_IN_SAME_REGION 0
		#else
		#define ROMABLE_REGION SRAM
		#define RAMABLE_REGION SRAM
		#define ROM_RAM_IN_SAME_REGION 1
		#endif
		#endif

		@@ -138,7 +141,13 @@ SECTIONS {
		_ectors = .;
		#endif /* CONFIG_CPP && !CONFIG_CPP_STATIC_INIT_GNU && __MWDT_LINKER_CMD__ */

		/* This extra MPU alignment of RAMABLE_REGION is only required if we put ROMABLE_REGION and
		* RAMABLE_REGION into the same (continuous) memory - otherwise we can get beginning of the
		* RAMABLE_REGION in the end of ROMABLE_REGION MPU aperture.
		*/
		#if ROM_RAM_IN_SAME_REGION
		MPU_ALIGN(ABSOLUTE(.) - __rom_region_start);
		#endif
		} GROUP_LINK_IN(ROMABLE_REGION)

		__rodata_region_end = .;

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