240 lines
7.1 KiB
C
240 lines
7.1 KiB
C
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief ARC specific kernel interface header
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*
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* This header contains the ARC specific kernel interface. It is
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* included by the kernel interface architecture-abstraction header
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* include/arch/cpu.h)
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*/
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#ifndef ZEPHYR_INCLUDE_ARCH_ARC_ARCH_H_
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#define ZEPHYR_INCLUDE_ARCH_ARC_ARCH_H_
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#include <generated_dts_board.h>
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#include <sw_isr_table.h>
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#ifdef CONFIG_CPU_ARCV2
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#include <arch/arc/v2/exc.h>
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#include <arch/arc/v2/irq.h>
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#include <arch/arc/v2/ffs.h>
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#include <arch/arc/v2/error.h>
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#include <arch/arc/v2/misc.h>
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#include <arch/arc/v2/aux_regs.h>
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#include <arch/arc/v2/arcv2_irq_unit.h>
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#include <arch/arc/v2/asm_inline.h>
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#include <arch/common/addr_types.h>
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#include "v2/sys_io.h"
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#ifdef CONFIG_ARC_CONNECT
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#include <arch/arc/v2/arc_connect.h>
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#endif
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#ifdef CONFIG_ARC_HAS_SECURE
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#include <arch/arc/v2/secureshield/arc_secure.h>
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#endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(CONFIG_MPU_STACK_GUARD) || defined(CONFIG_USERSPACE)
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#if defined(CONFIG_ARC_CORE_MPU)
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#if CONFIG_ARC_MPU_VER == 2
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/*
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* The minimum MPU region of MPU v2 is 2048 bytes. The
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* start address of MPU region should be aligned to the
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* region size
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*/
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/* The STACK_GUARD_SIZE is the size of stack guard region */
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#define STACK_ALIGN 2048
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#elif CONFIG_ARC_MPU_VER == 3
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#define STACK_ALIGN 32
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#else
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#error "Unsupported MPU version"
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#endif /* CONFIG_ARC_MPU_VER */
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#else /* CONFIG_ARC_CORE_MPU */
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#error "Requires to enable MPU"
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#endif
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#else /* CONFIG_MPU_STACK_GUARD || CONFIG_USERSPACE */
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#define STACK_ALIGN 4
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#endif
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#if defined(CONFIG_MPU_STACK_GUARD)
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#if CONFIG_ARC_MPU_VER == 2
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#define STACK_GUARD_SIZE 2048
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#elif CONFIG_ARC_MPU_VER == 3
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#define STACK_GUARD_SIZE 32
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#endif
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#else /* CONFIG_MPU_STACK_GUARD */
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#define STACK_GUARD_SIZE 0
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#endif /* CONFIG_MPU_STACK_GUARD */
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#define STACK_SIZE_ALIGN(x) ROUND_UP(x, STACK_ALIGN)
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/**
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* @brief Calculate power of two ceiling for a buffer size input
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*
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*/
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#define POW2_CEIL(x) ((1 << (31 - __builtin_clz(x))) < x ? \
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1 << (31 - __builtin_clz(x) + 1) : \
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1 << (31 - __builtin_clz(x)))
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#if defined(CONFIG_USERSPACE)
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#define Z_ARCH_THREAD_STACK_RESERVED \
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(STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE)
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#else
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#define Z_ARCH_THREAD_STACK_RESERVED (STACK_GUARD_SIZE)
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#endif
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#if defined(CONFIG_USERSPACE) && CONFIG_ARC_MPU_VER == 2
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/* MPUv2 requires
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* - region size must be power of 2 and >= 2048
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* - region start must be aligned to its size
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*/
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#define Z_ARC_MPUV2_SIZE_ALIGN(size) POW2_CEIL(STACK_SIZE_ALIGN(size))
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/*
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* user stack and guard are protected using MPU regions, so need to adhere to
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* MPU start, size alignment
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*/
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#define Z_ARC_THREAD_STACK_ALIGN(size) Z_ARC_MPUV2_SIZE_ALIGN(size)
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#define Z_ARCH_THREAD_STACK_LEN(size) \
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(Z_ARC_MPUV2_SIZE_ALIGN(size) + Z_ARCH_THREAD_STACK_RESERVED)
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/*
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* for stack array, each array member should be aligned both in size
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* and start
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*/
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#define Z_ARC_THREAD_STACK_ARRAY_LEN(size) \
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(Z_ARC_MPUV2_SIZE_ALIGN(size) + \
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MAX(Z_ARC_MPUV2_SIZE_ALIGN(size), \
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POW2_CEIL(Z_ARCH_THREAD_STACK_RESERVED)))
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#else
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/*
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* MPUv3, no-mpu and no USERSPACE share the same macro definitions.
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* For MPU STACK_GUARD kernel stacks do not need a MPU region to protect,
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* only guard needs to be protected and aligned. For MPUv3, MPU_STACK_GUARD
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* requires start 32 bytes aligned, also for size which is decided by stack
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* array and USERSPACE; For MPUv2, MPU_STACK_GUARD requires
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* start 2048 bytes aligned, also for size which is decided by stack array.
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*
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* When no-mpu and no USERSPACE/MPU_STACK_GUARD, everything is 4 bytes
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* aligned
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*/
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#define Z_ARC_THREAD_STACK_ALIGN(size) (STACK_ALIGN)
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#define Z_ARCH_THREAD_STACK_LEN(size) \
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(STACK_SIZE_ALIGN(size) + Z_ARCH_THREAD_STACK_RESERVED)
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#define Z_ARC_THREAD_STACK_ARRAY_LEN(size) \
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Z_ARCH_THREAD_STACK_LEN(size)
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#endif /* CONFIG_USERSPACE && CONFIG_ARC_MPU_VER == 2 */
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#define Z_ARCH_THREAD_STACK_DEFINE(sym, size) \
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struct _k_thread_stack_element __noinit \
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__aligned(Z_ARC_THREAD_STACK_ALIGN(size)) \
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sym[Z_ARCH_THREAD_STACK_LEN(size)]
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#define Z_ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
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struct _k_thread_stack_element __noinit \
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__aligned(Z_ARC_THREAD_STACK_ALIGN(size)) \
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sym[nmemb][Z_ARC_THREAD_STACK_ARRAY_LEN(size)]
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#define Z_ARCH_THREAD_STACK_MEMBER(sym, size) \
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struct _k_thread_stack_element \
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__aligned(Z_ARC_THREAD_STACK_ALIGN(size)) \
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sym[Z_ARCH_THREAD_STACK_LEN(size)]
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#define Z_ARCH_THREAD_STACK_SIZEOF(sym) \
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(sizeof(sym) - Z_ARCH_THREAD_STACK_RESERVED)
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#define Z_ARCH_THREAD_STACK_BUFFER(sym) \
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((char *)(sym))
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#ifdef CONFIG_ARC_MPU
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#ifndef _ASMLANGUAGE
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/* Legacy case: retain containing extern "C" with C++ */
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#include <arch/arc/v2/mpu/arc_mpu.h>
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#define K_MEM_PARTITION_P_NA_U_NA AUX_MPU_ATTR_N
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#define K_MEM_PARTITION_P_RW_U_RW (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_UR | \
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AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR)
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#define K_MEM_PARTITION_P_RW_U_RO (AUX_MPU_ATTR_UR | \
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AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR)
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#define K_MEM_PARTITION_P_RW_U_NA (AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR)
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#define K_MEM_PARTITION_P_RO_U_RO (AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR)
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#define K_MEM_PARTITION_P_RO_U_NA (AUX_MPU_ATTR_KR)
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/* Execution-allowed attributes */
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#define K_MEM_PARTITION_P_RWX_U_RWX (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_UR | \
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AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR | \
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AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE)
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#define K_MEM_PARTITION_P_RWX_U_RX (AUX_MPU_ATTR_UR | \
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AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR | \
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AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE)
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#define K_MEM_PARTITION_P_RX_U_RX (AUX_MPU_ATTR_UR | \
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AUX_MPU_ATTR_KR | \
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AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE)
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#define K_MEM_PARTITION_IS_WRITABLE(attr) \
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({ \
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int __is_writable__; \
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attr &= (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW); \
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switch (attr) { \
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case (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW): \
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case AUX_MPU_ATTR_UW: \
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case AUX_MPU_ATTR_KW: \
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__is_writable__ = 1; \
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break; \
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default: \
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__is_writable__ = 0; \
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break; \
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} \
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__is_writable__; \
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})
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#define K_MEM_PARTITION_IS_EXECUTABLE(attr) \
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((attr) & (AUX_MPU_ATTR_KE | AUX_MPU_ATTR_UE))
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#endif /* _ASMLANGUAGE */
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#if CONFIG_ARC_MPU_VER == 2
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#define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
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BUILD_ASSERT_MSG(!(((size) & ((size) - 1))) && (size) >= STACK_ALIGN \
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&& !((u32_t)(start) & ((size) - 1)), \
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"the size of the partition must be power of 2" \
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" and greater than or equal to the mpu adddress alignment." \
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"start address of the partition must align with size.")
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#elif CONFIG_ARC_MPU_VER == 3
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#define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
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BUILD_ASSERT_MSG((size) % STACK_ALIGN == 0 && (size) >= STACK_ALIGN \
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&& (u32_t)(start) % STACK_ALIGN == 0, \
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"the size of the partition must align with 32" \
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" and greater than or equal to 32." \
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"start address of the partition must align with 32.")
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#endif
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#endif /* CONFIG_ARC_MPU*/
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#ifndef _ASMLANGUAGE
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/* Typedef for the k_mem_partition attribute*/
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typedef u32_t k_mem_partition_attr_t;
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static ALWAYS_INLINE void z_arch_nop(void)
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{
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__asm__ volatile("nop");
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}
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#endif /* _ASMLANGUAGE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_INCLUDE_ARCH_ARC_ARCH_H_ */
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