include/arch/arc/arch.h - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2014 Wind River Systems, Inc.
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 /**
  * @file
  * @brief ARC specific kernel interface header
  *
  * This header contains the ARC specific kernel interface.  It is
  * included by the kernel interface architecture-abstraction header
  * include/arch/cpu.h)
  */

 #ifndef _ARC_ARCH__H_
 #define _ARC_ARCH__H_

 #ifdef __cplusplus
 extern "C" {
 #endif

 /* APIs need to support non-byte addressable architectures */

 #define OCTET_TO_SIZEOFUNIT(X) (X)
 #define SIZEOFUNIT_TO_OCTET(X) (X)

 #include <generated_dts_board.h>
 #include <sw_isr_table.h>
 #ifdef CONFIG_CPU_ARCV2
 #include <arch/arc/v2/exc.h>
 #include <arch/arc/v2/irq.h>
 #include <arch/arc/v2/ffs.h>
 #include <arch/arc/v2/error.h>
 #include <arch/arc/v2/misc.h>
 #include <arch/arc/v2/aux_regs.h>
 #include <arch/arc/v2/arcv2_irq_unit.h>
 #include <arch/arc/v2/asm_inline.h>
 #include <arch/arc/v2/addr_types.h>
 #endif

 #if defined(CONFIG_MPU_STACK_GUARD) || defined(CONFIG_USERSPACE)
 	#if defined(CONFIG_ARC_CORE_MPU)
 		#if CONFIG_ARC_MPU_VER == 2
 		/*
 		 * The minimum MPU region of MPU v2 is 2048 bytes. The
 		 * start address of MPU region should be aligned to the
 		 * region size
 		 */
 		/* The STACK_GUARD_SIZE is the size of stack guard region */
 			#define STACK_ALIGN  2048
 		#elif CONFIG_ARC_MPU_VER == 3
 			#define STACK_ALIGN 32
 		#else
 			#error "Unsupported MPU version"
 		#endif /* CONFIG_ARC_MPU_VER */

 	#else /* CONFIG_ARC_CORE_MPU */
 		#error "Requires to enable MPU"
 	#endif

 #else  /* CONFIG_MPU_STACK_GUARD  || CONFIG_USERSPACE */
 	#define STACK_ALIGN  4
 #endif

 #if defined(CONFIG_MPU_STACK_GUARD)
 	#if CONFIG_ARC_MPU_VER == 2
 	#define STACK_GUARD_SIZE 2048
 	#elif CONFIG_ARC_MPU_VER == 3
 	#define STACK_GUARD_SIZE 32
 	#endif
 #else /* CONFIG_MPU_STACK_GUARD */
 	#define STACK_GUARD_SIZE 0
 #endif /* CONFIG_MPU_STACK_GUARD */

 #define STACK_SIZE_ALIGN(x)	max(STACK_ALIGN, x)


 /**
  * @brief Calculate power of two ceiling for a buffer size input
  *
  */
 #define POW2_CEIL(x) ((1 << (31 - __builtin_clz(x))) < x ?  \
 		1 << (31 - __builtin_clz(x) + 1) : \
 		1 << (31 - __builtin_clz(x)))

 #if defined(CONFIG_USERSPACE)

 #if CONFIG_ARC_MPU_VER == 2

 #define _ARCH_THREAD_STACK_DEFINE(sym, size) \
 	struct _k_thread_stack_element __kernel_noinit \
 		__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
 		sym[POW2_CEIL(STACK_SIZE_ALIGN(size)) + \
 		+  STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

 #define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
 	struct _k_thread_stack_element __kernel_noinit \
 		__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
 		sym[nmemb][POW2_CEIL(STACK_SIZE_ALIGN(size)) + \
 		+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

 #define _ARCH_THREAD_STACK_MEMBER(sym, size) \
 	struct _k_thread_stack_element \
 		__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
 		sym[POW2_CEIL(size) + \
 		+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

 #elif CONFIG_ARC_MPU_VER == 3

 #define _ARCH_THREAD_STACK_DEFINE(sym, size) \
 	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
 		sym[size + \
 		+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

 #define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
 	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
 		sym[nmemb][size + \
 		+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

 #define _ARCH_THREAD_STACK_MEMBER(sym, size) \
 	struct _k_thread_stack_element __aligned(STACK_ALIGN) \
 		sym[size + \
 		+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

 #endif /* CONFIG_ARC_MPU_VER */

 #define _ARCH_THREAD_STACK_SIZEOF(sym) \
 		(sizeof(sym) - CONFIG_PRIVILEGED_STACK_SIZE - STACK_GUARD_SIZE)

 #define _ARCH_THREAD_STACK_BUFFER(sym) \
 		((char *)(sym))

 #else /* CONFIG_USERSPACE */

 #define _ARCH_THREAD_STACK_DEFINE(sym, size) \
 	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
 		sym[size + STACK_GUARD_SIZE]

 #define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
 	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
 		sym[nmemb][size + STACK_GUARD_SIZE]

 #define _ARCH_THREAD_STACK_MEMBER(sym, size) \
 	struct _k_thread_stack_element __aligned(STACK_ALIGN) \
 		sym[size + STACK_GUARD_SIZE]

 #define _ARCH_THREAD_STACK_SIZEOF(sym) (sizeof(sym) - STACK_GUARD_SIZE)

 #define _ARCH_THREAD_STACK_BUFFER(sym) ((char *)(sym + STACK_GUARD_SIZE))

 #endif /* CONFIG_USERSPACE */


 #ifdef CONFIG_USERSPACE
 #ifdef CONFIG_ARC_MPU
 #ifndef _ASMLANGUAGE
 #include <arch/arc/v2/mpu/arc_mpu.h>

 #define K_MEM_PARTITION_P_NA_U_NA	AUX_MPU_RDP_N
 #define K_MEM_PARTITION_P_RW_U_RW	(AUX_MPU_RDP_UW | AUX_MPU_RDP_UR | \
 					 AUX_MPU_RDP_KW | AUX_MPU_RDP_KR)
 #define K_MEM_PARTITION_P_RW_U_RO	(AUX_MPU_RDP_UR | \
 					 AUX_MPU_RDP_KW | AUX_MPU_RDP_KR)
 #define K_MEM_PARTITION_P_RW_U_NA	(AUX_MPU_RDP_KW | AUX_MPU_RDP_KR)
 #define K_MEM_PARTITION_P_RO_U_RO	(AUX_MPU_RDP_UR | AUX_MPU_RDP_KR)
 #define K_MEM_PARTITION_P_RO_U_NA	(AUX_MPU_RDP_KR)

 /* Execution-allowed attributes */
 #define K_MEM_PARTITION_P_RWX_U_RWX	(AUX_MPU_RDP_UW | AUX_MPU_RDP_UR | \
 					 AUX_MPU_RDP_KW | AUX_MPU_RDP_KR | \
 					 AUX_MPU_RDP_KE | AUX_MPU_RDP_UE)
 #define K_MEM_PARTITION_P_RWX_U_RX	(AUX_MPU_RDP_UR | \
 					 AUX_MPU_RDP_KW | AUX_MPU_RDP_KR | \
 					 AUX_MPU_RDP_KE | AUX_MPU_RDP_UE)
 #define K_MEM_PARTITION_P_RX_U_RX	(AUX_MPU_RDP_UR | \
 					 AUX_MPU_RDP_KR | \
 					 AUX_MPU_RDP_KE | AUX_MPU_RDP_UE)

 #define K_MEM_PARTITION_IS_WRITABLE(attr) \
 	({ \
 		int __is_writable__; \
 		attr &= (AUX_MPU_RDP_UW | AUX_MPU_RDP_KW); \
 		switch (attr) { \
 		case (AUX_MPU_RDP_UW | AUX_MPU_RDP_KW): \
 		case AUX_MPU_RDP_UW: \
 		case AUX_MPU_RDP_KW: \
 			__is_writable__ = 1; \
 			break; \
 		default: \
 			__is_writable__ = 0; \
 			break; \
 		} \
 		__is_writable__; \
 	})
 #define K_MEM_PARTITION_IS_EXECUTABLE(attr) \
 	((attr) & (AUX_MPU_RDP_KE | AUX_MPU_RDP_UE))

 #endif /* _ASMLANGUAGE */

 #if CONFIG_ARC_MPU_VER == 2
 #define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
 	BUILD_ASSERT_MSG(!(((size) & ((size) - 1))) && (size) >= STACK_ALIGN \
 		 && !((u32_t)(start) & ((size) - 1)), \
 		"the size of the partition must be power of 2" \
 		" and greater than or equal to the mpu adddress alignment." \
 		"start address of the partition must align with size.")
 #elif CONFIG_ARC_MPU_VER == 3
 #define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
 	BUILD_ASSERT_MSG((size) % STACK_ALIGN == 0 && (size) >= STACK_ALIGN \
 		 && (u32_t)(start) % STACK_ALIGN == 0, \
 		"the size of the partition must align with 32" \
 		" and greater than or equal to 32." \
 		"start address of the partition must align with 32.")
 #endif
 #endif /* CONFIG_ARC_MPU*/
 #endif /* CONFIG_USERSPACE */

 #ifndef _ASMLANGUAGE
 /* Typedef for the k_mem_partition attribute*/
 typedef u32_t k_mem_partition_attr_t;
 #endif /* _ASMLANGUAGE */

 #ifdef CONFIG_USERSPACE
 #ifndef _ASMLANGUAGE
 /* Syscall invocation macros. arc-specific machine constraints used to ensure
  * args land in the proper registers. Currently, they are all stub functions
  * just for enabling CONFIG_USERSPACE on arc w/o errors.
  */

 static inline u32_t _arch_syscall_invoke6(u32_t arg1, u32_t arg2, u32_t arg3,
 					  u32_t arg4, u32_t arg5, u32_t arg6,
 					  u32_t call_id)
 {
 	register u32_t ret __asm__("r0") = arg1;
 	register u32_t r1 __asm__("r1") = arg2;
 	register u32_t r2 __asm__("r2") = arg3;
 	register u32_t r3 __asm__("r3") = arg4;
 	register u32_t r4 __asm__("r4") = arg5;
 	register u32_t r5 __asm__("r5") = arg6;
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r1), "r" (r2), "r" (r3),
 			   "r" (r4), "r" (r5), "r" (r6));

 	return ret;
 }

 static inline u32_t _arch_syscall_invoke5(u32_t arg1, u32_t arg2, u32_t arg3,
 					  u32_t arg4, u32_t arg5, u32_t call_id)
 {
 	register u32_t ret __asm__("r0") = arg1;
 	register u32_t r1 __asm__("r1") = arg2;
 	register u32_t r2 __asm__("r2") = arg3;
 	register u32_t r3 __asm__("r3") = arg4;
 	register u32_t r4 __asm__("r4") = arg5;
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r1), "r" (r2), "r" (r3),
 			   "r" (r4), "r" (r6));

 	return ret;
 }

 static inline u32_t _arch_syscall_invoke4(u32_t arg1, u32_t arg2, u32_t arg3,
 					  u32_t arg4, u32_t call_id)
 {
 	register u32_t ret __asm__("r0") = arg1;
 	register u32_t r1 __asm__("r1") = arg2;
 	register u32_t r2 __asm__("r2") = arg3;
 	register u32_t r3 __asm__("r3") = arg4;
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r1), "r" (r2), "r" (r3),
 			   "r" (r6));

 	return ret;
 }

 static inline u32_t _arch_syscall_invoke3(u32_t arg1, u32_t arg2, u32_t arg3,
 					  u32_t call_id)
 {
 	register u32_t ret __asm__("r0") = arg1;
 	register u32_t r1 __asm__("r1") = arg2;
 	register u32_t r2 __asm__("r2") = arg3;
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r1), "r" (r2), "r" (r6));

 	return ret;
 }

 static inline u32_t _arch_syscall_invoke2(u32_t arg1, u32_t arg2, u32_t call_id)
 {
 	register u32_t ret __asm__("r0") = arg1;
 	register u32_t r1 __asm__("r1") = arg2;
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r1), "r" (r6));

 	return ret;
 }

 static inline u32_t _arch_syscall_invoke1(u32_t arg1, u32_t call_id)
 {
 	register u32_t ret __asm__("r0") = arg1;
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r6));

 	return ret;
 }

 static inline u32_t _arch_syscall_invoke0(u32_t call_id)
 {
 	register u32_t ret __asm__("r0");
 	register u32_t r6 __asm__("r6") = call_id;

 	compiler_barrier();

 	__asm__ volatile(
 			 "trap_s %[trap_s_id]\n"
 			 : "=r"(ret)
 			 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
 			   "r" (ret), "r" (r6));

 	return ret;
 }

 static inline int _arch_is_user_context(void)
 {
 	u32_t status;

 	compiler_barrier();

 	__asm__ volatile("lr %0, [%[status32]]\n"
 			 : "=r"(status)
 			 : [status32] "i" (_ARC_V2_STATUS32));

 	return !(status & _ARC_V2_STATUS32_US);
 }

 #endif /* _ASMLANGUAGE */
 #endif /* CONFIG_USERSPACE */
 #ifdef __cplusplus
 }
 #endif
 #endif /* _ARC_ARCH__H_ */
	/*
	* Copyright (c) 2014 Wind River Systems, Inc.
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	/**
	* @file
	* @brief ARC specific kernel interface header
	*
	* This header contains the ARC specific kernel interface. It is
	* included by the kernel interface architecture-abstraction header
	* include/arch/cpu.h)
	*/

	#ifndef _ARC_ARCH__H_
	#define _ARC_ARCH__H_

	#ifdef __cplusplus
	extern "C" {
	#endif

	/* APIs need to support non-byte addressable architectures */

	#define OCTET_TO_SIZEOFUNIT(X) (X)
	#define SIZEOFUNIT_TO_OCTET(X) (X)

	#include <generated_dts_board.h>
	#include <sw_isr_table.h>
	#ifdef CONFIG_CPU_ARCV2
	#include <arch/arc/v2/exc.h>
	#include <arch/arc/v2/irq.h>
	#include <arch/arc/v2/ffs.h>
	#include <arch/arc/v2/error.h>
	#include <arch/arc/v2/misc.h>
	#include <arch/arc/v2/aux_regs.h>
	#include <arch/arc/v2/arcv2_irq_unit.h>
	#include <arch/arc/v2/asm_inline.h>
	#include <arch/arc/v2/addr_types.h>
	#endif

	#if defined(CONFIG_MPU_STACK_GUARD) \|\| defined(CONFIG_USERSPACE)
	#if defined(CONFIG_ARC_CORE_MPU)
	#if CONFIG_ARC_MPU_VER == 2
	/*
	* The minimum MPU region of MPU v2 is 2048 bytes. The
	* start address of MPU region should be aligned to the
	* region size
	*/
	/* The STACK_GUARD_SIZE is the size of stack guard region */
	#define STACK_ALIGN 2048
	#elif CONFIG_ARC_MPU_VER == 3
	#define STACK_ALIGN 32
	#else
	#error "Unsupported MPU version"
	#endif /* CONFIG_ARC_MPU_VER */

	#else /* CONFIG_ARC_CORE_MPU */
	#error "Requires to enable MPU"
	#endif

	#else /* CONFIG_MPU_STACK_GUARD \|\| CONFIG_USERSPACE */
	#define STACK_ALIGN 4
	#endif

	#if defined(CONFIG_MPU_STACK_GUARD)
	#if CONFIG_ARC_MPU_VER == 2
	#define STACK_GUARD_SIZE 2048
	#elif CONFIG_ARC_MPU_VER == 3
	#define STACK_GUARD_SIZE 32
	#endif
	#else /* CONFIG_MPU_STACK_GUARD */
	#define STACK_GUARD_SIZE 0
	#endif /* CONFIG_MPU_STACK_GUARD */

	#define STACK_SIZE_ALIGN(x) max(STACK_ALIGN, x)


	/**
	* @brief Calculate power of two ceiling for a buffer size input
	*
	*/
	#define POW2_CEIL(x) ((1 << (31 - __builtin_clz(x))) < x ? \
	1 << (31 - __builtin_clz(x) + 1) : \
	1 << (31 - __builtin_clz(x)))

	#if defined(CONFIG_USERSPACE)

	#if CONFIG_ARC_MPU_VER == 2

	#define _ARCH_THREAD_STACK_DEFINE(sym, size) \
	struct _k_thread_stack_element __kernel_noinit \
	__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
	sym[POW2_CEIL(STACK_SIZE_ALIGN(size)) + \
	+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

	#define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
	struct _k_thread_stack_element __kernel_noinit \
	__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
	sym[nmemb][POW2_CEIL(STACK_SIZE_ALIGN(size)) + \
	+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

	#define _ARCH_THREAD_STACK_MEMBER(sym, size) \
	struct _k_thread_stack_element \
	__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
	sym[POW2_CEIL(size) + \
	+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

	#elif CONFIG_ARC_MPU_VER == 3

	#define _ARCH_THREAD_STACK_DEFINE(sym, size) \
	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
	sym[size + \
	+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

	#define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
	sym[nmemb][size + \
	+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

	#define _ARCH_THREAD_STACK_MEMBER(sym, size) \
	struct _k_thread_stack_element __aligned(STACK_ALIGN) \
	sym[size + \
	+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]

	#endif /* CONFIG_ARC_MPU_VER */

	#define _ARCH_THREAD_STACK_SIZEOF(sym) \
	(sizeof(sym) - CONFIG_PRIVILEGED_STACK_SIZE - STACK_GUARD_SIZE)

	#define _ARCH_THREAD_STACK_BUFFER(sym) \
	((char *)(sym))

	#else /* CONFIG_USERSPACE */

	#define _ARCH_THREAD_STACK_DEFINE(sym, size) \
	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
	sym[size + STACK_GUARD_SIZE]

	#define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
	struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
	sym[nmemb][size + STACK_GUARD_SIZE]

	#define _ARCH_THREAD_STACK_MEMBER(sym, size) \
	struct _k_thread_stack_element __aligned(STACK_ALIGN) \
	sym[size + STACK_GUARD_SIZE]

	#define _ARCH_THREAD_STACK_SIZEOF(sym) (sizeof(sym) - STACK_GUARD_SIZE)

	#define _ARCH_THREAD_STACK_BUFFER(sym) ((char *)(sym + STACK_GUARD_SIZE))

	#endif /* CONFIG_USERSPACE */


	#ifdef CONFIG_USERSPACE
	#ifdef CONFIG_ARC_MPU
	#ifndef _ASMLANGUAGE
	#include <arch/arc/v2/mpu/arc_mpu.h>

	#define K_MEM_PARTITION_P_NA_U_NA AUX_MPU_RDP_N
	#define K_MEM_PARTITION_P_RW_U_RW (AUX_MPU_RDP_UW \| AUX_MPU_RDP_UR \| \
	AUX_MPU_RDP_KW \| AUX_MPU_RDP_KR)
	#define K_MEM_PARTITION_P_RW_U_RO (AUX_MPU_RDP_UR \| \
	AUX_MPU_RDP_KW \| AUX_MPU_RDP_KR)
	#define K_MEM_PARTITION_P_RW_U_NA (AUX_MPU_RDP_KW \| AUX_MPU_RDP_KR)
	#define K_MEM_PARTITION_P_RO_U_RO (AUX_MPU_RDP_UR \| AUX_MPU_RDP_KR)
	#define K_MEM_PARTITION_P_RO_U_NA (AUX_MPU_RDP_KR)

	/* Execution-allowed attributes */
	#define K_MEM_PARTITION_P_RWX_U_RWX (AUX_MPU_RDP_UW \| AUX_MPU_RDP_UR \| \
	AUX_MPU_RDP_KW \| AUX_MPU_RDP_KR \| \
	AUX_MPU_RDP_KE \| AUX_MPU_RDP_UE)
	#define K_MEM_PARTITION_P_RWX_U_RX (AUX_MPU_RDP_UR \| \
	AUX_MPU_RDP_KW \| AUX_MPU_RDP_KR \| \
	AUX_MPU_RDP_KE \| AUX_MPU_RDP_UE)
	#define K_MEM_PARTITION_P_RX_U_RX (AUX_MPU_RDP_UR \| \
	AUX_MPU_RDP_KR \| \
	AUX_MPU_RDP_KE \| AUX_MPU_RDP_UE)

	#define K_MEM_PARTITION_IS_WRITABLE(attr) \
	({ \
	int __is_writable__; \
	attr &= (AUX_MPU_RDP_UW \| AUX_MPU_RDP_KW); \
	switch (attr) { \
	case (AUX_MPU_RDP_UW \| AUX_MPU_RDP_KW): \
	case AUX_MPU_RDP_UW: \
	case AUX_MPU_RDP_KW: \
	__is_writable__ = 1; \
	break; \
	default: \
	__is_writable__ = 0; \
	break; \
	} \
	__is_writable__; \
	})
	#define K_MEM_PARTITION_IS_EXECUTABLE(attr) \
	((attr) & (AUX_MPU_RDP_KE \| AUX_MPU_RDP_UE))

	#endif /* _ASMLANGUAGE */

	#if CONFIG_ARC_MPU_VER == 2
	#define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
	BUILD_ASSERT_MSG(!(((size) & ((size) - 1))) && (size) >= STACK_ALIGN \
	&& !((u32_t)(start) & ((size) - 1)), \
	"the size of the partition must be power of 2" \
	" and greater than or equal to the mpu adddress alignment." \
	"start address of the partition must align with size.")
	#elif CONFIG_ARC_MPU_VER == 3
	#define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
	BUILD_ASSERT_MSG((size) % STACK_ALIGN == 0 && (size) >= STACK_ALIGN \
	&& (u32_t)(start) % STACK_ALIGN == 0, \
	"the size of the partition must align with 32" \
	" and greater than or equal to 32." \
	"start address of the partition must align with 32.")
	#endif
	#endif /* CONFIG_ARC_MPU*/
	#endif /* CONFIG_USERSPACE */

	#ifndef _ASMLANGUAGE
	/* Typedef for the k_mem_partition attribute*/
	typedef u32_t k_mem_partition_attr_t;
	#endif /* _ASMLANGUAGE */

	#ifdef CONFIG_USERSPACE
	#ifndef _ASMLANGUAGE
	/* Syscall invocation macros. arc-specific machine constraints used to ensure
	* args land in the proper registers. Currently, they are all stub functions
	* just for enabling CONFIG_USERSPACE on arc w/o errors.
	*/

	static inline u32_t _arch_syscall_invoke6(u32_t arg1, u32_t arg2, u32_t arg3,
	u32_t arg4, u32_t arg5, u32_t arg6,
	u32_t call_id)
	{
	register u32_t ret __asm__("r0") = arg1;
	register u32_t r1 __asm__("r1") = arg2;
	register u32_t r2 __asm__("r2") = arg3;
	register u32_t r3 __asm__("r3") = arg4;
	register u32_t r4 __asm__("r4") = arg5;
	register u32_t r5 __asm__("r5") = arg6;
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r1), "r" (r2), "r" (r3),
	"r" (r4), "r" (r5), "r" (r6));

	return ret;
	}

	static inline u32_t _arch_syscall_invoke5(u32_t arg1, u32_t arg2, u32_t arg3,
	u32_t arg4, u32_t arg5, u32_t call_id)
	{
	register u32_t ret __asm__("r0") = arg1;
	register u32_t r1 __asm__("r1") = arg2;
	register u32_t r2 __asm__("r2") = arg3;
	register u32_t r3 __asm__("r3") = arg4;
	register u32_t r4 __asm__("r4") = arg5;
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r1), "r" (r2), "r" (r3),
	"r" (r4), "r" (r6));

	return ret;
	}

	static inline u32_t _arch_syscall_invoke4(u32_t arg1, u32_t arg2, u32_t arg3,
	u32_t arg4, u32_t call_id)
	{
	register u32_t ret __asm__("r0") = arg1;
	register u32_t r1 __asm__("r1") = arg2;
	register u32_t r2 __asm__("r2") = arg3;
	register u32_t r3 __asm__("r3") = arg4;
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r1), "r" (r2), "r" (r3),
	"r" (r6));

	return ret;
	}

	static inline u32_t _arch_syscall_invoke3(u32_t arg1, u32_t arg2, u32_t arg3,
	u32_t call_id)
	{
	register u32_t ret __asm__("r0") = arg1;
	register u32_t r1 __asm__("r1") = arg2;
	register u32_t r2 __asm__("r2") = arg3;
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r1), "r" (r2), "r" (r6));

	return ret;
	}

	static inline u32_t _arch_syscall_invoke2(u32_t arg1, u32_t arg2, u32_t call_id)
	{
	register u32_t ret __asm__("r0") = arg1;
	register u32_t r1 __asm__("r1") = arg2;
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r1), "r" (r6));

	return ret;
	}

	static inline u32_t _arch_syscall_invoke1(u32_t arg1, u32_t call_id)
	{
	register u32_t ret __asm__("r0") = arg1;
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r6));

	return ret;
	}

	static inline u32_t _arch_syscall_invoke0(u32_t call_id)
	{
	register u32_t ret __asm__("r0");
	register u32_t r6 __asm__("r6") = call_id;

	compiler_barrier();

	__asm__ volatile(
	"trap_s %[trap_s_id]\n"
	: "=r"(ret)
	: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
	"r" (ret), "r" (r6));

	return ret;
	}

	static inline int _arch_is_user_context(void)
	{
	u32_t status;

	compiler_barrier();

	__asm__ volatile("lr %0, [%[status32]]\n"
	: "=r"(status)
	: [status32] "i" (_ARC_V2_STATUS32));

	return !(status & _ARC_V2_STATUS32_US);
	}

	#endif /* _ASMLANGUAGE */
	#endif /* CONFIG_USERSPACE */
	#ifdef __cplusplus
	}
	#endif
	#endif /* _ARC_ARCH__H_ */