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arch: arc: add support of mpu v3

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Add support of ARC mpu version 3 which can have region size down to 32
bytes

Signed-off-by: Yuguo Zou <yuguo.zou@synopsys.com>
This commit is contained in:
Yuguo Zou 2021-08-19 17:54:29 +08:00 • committed by Anas Nashif
commit 333501e871
3 changed files with 7 additions and 2 deletions
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5
arch/arc/core/mpu/arc_mpu_v2_internal.h
View file

@ -17,7 +17,12 @@
#define AUX_MPU_RDP_SIZE_MASK (0xE03)
/* For MPU version 2, the minimum protection region size is 2048 bytes */
#if CONFIG_ARC_MPU_VER == 2
#define ARC_FEATURE_MPU_ALIGNMENT_BITS 11
/* For MPU version 3, the minimum protection region size is 32 bytes */
#else
#define ARC_FEATURE_MPU_ALIGNMENT_BITS 5
#endif
/**
* This internal function initializes a MPU region

2
include/arch/arc/arch.h
View file

@ -66,7 +66,7 @@ extern "C" {
#ifdef CONFIG_ARC_CORE_MPU
#if CONFIG_ARC_MPU_VER == 2
#define Z_ARC_MPU_ALIGN 2048
#elif CONFIG_ARC_MPU_VER == 4
#elif (CONFIG_ARC_MPU_VER == 3) || (CONFIG_ARC_MPU_VER == 4)
#define Z_ARC_MPU_ALIGN 32
#else
#error "Unsupported MPU version"

2
include/arch/arc/v2/linker.ld
View file

@ -30,7 +30,7 @@
#ifdef CONFIG_ARC_MPU_ENABLE
#if CONFIG_ARC_MPU_VER == 2
#define MPU_MIN_SIZE 2048
#elif CONFIG_ARC_MPU_VER == 4
#elif (CONFIG_ARC_MPU_VER == 3) || (CONFIG_ARC_MPU_VER == 4)
#define MPU_MIN_SIZE 32
#endif
#define MPU_MIN_SIZE_ALIGN . = ALIGN(MPU_MIN_SIZE);