arch.h

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/*
 * Copyright (c) 2013-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_ARCH_ARM_ARCH_H_
#define ZEPHYR_INCLUDE_ARCH_ARM_ARCH_H_
 
/* Add include for DTS generated information */
#include <zephyr/devicetree.h>
 
#include <zephyr/arch/arm/thread.h>
#include <zephyr/arch/arm/exception.h>
#include <zephyr/arch/arm/irq.h>
#include <zephyr/arch/arm/error.h>
#include <zephyr/arch/arm/misc.h>
#include <zephyr/arch/common/addr_types.h>
#include <zephyr/arch/common/ffs.h>
#include <zephyr/arch/arm/nmi.h>
#include <zephyr/arch/arm/asm_inline.h>
#include <zephyr/arch/common/sys_bitops.h>
#if defined(CONFIG_GDBSTUB)
#include <zephyr/arch/arm/gdbstub.h>
#endif
 
#ifdef CONFIG_CPU_CORTEX_M
#include <zephyr/arch/arm/cortex_m/cpu.h>
#include <zephyr/arch/arm/cortex_m/memory_map.h>
#include <zephyr/arch/common/sys_io.h>
#elif defined(CONFIG_CPU_AARCH32_CORTEX_R) || defined(CONFIG_CPU_AARCH32_CORTEX_A)
#include <zephyr/arch/arm/cortex_a_r/cpu.h>
#include <zephyr/arch/arm/cortex_a_r/sys_io.h>
#if defined(CONFIG_AARCH32_ARMV8_R)
#include <zephyr/arch/arm/cortex_a_r/lib_helpers.h>
#include <zephyr/arch/arm/cortex_a_r/armv8_timer.h>
#else
#include <zephyr/arch/arm/cortex_a_r/timer.h>
#endif
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef _ASMLANGUAGE
 
#include <zephyr/fatal_types.h>
 
enum k_fatal_error_reason_arch {
        /* Cortex-M MEMFAULT exceptions */
        K_ERR_ARM_MEM_GENERIC = K_ERR_ARCH_START,
        K_ERR_ARM_MEM_STACKING,
        K_ERR_ARM_MEM_UNSTACKING,
        K_ERR_ARM_MEM_DATA_ACCESS,
        K_ERR_ARM_MEM_INSTRUCTION_ACCESS,
        K_ERR_ARM_MEM_FP_LAZY_STATE_PRESERVATION,
 
        /* Cortex-M BUSFAULT exceptions */
        K_ERR_ARM_BUS_GENERIC,
        K_ERR_ARM_BUS_STACKING,
        K_ERR_ARM_BUS_UNSTACKING,
        K_ERR_ARM_BUS_PRECISE_DATA_BUS,
        K_ERR_ARM_BUS_IMPRECISE_DATA_BUS,
        K_ERR_ARM_BUS_INSTRUCTION_BUS,
        K_ERR_ARM_BUS_FP_LAZY_STATE_PRESERVATION,
 
        /* Cortex-M USAGEFAULT exceptions */
        K_ERR_ARM_USAGE_GENERIC,
        K_ERR_ARM_USAGE_DIV_0,
        K_ERR_ARM_USAGE_UNALIGNED_ACCESS,
        K_ERR_ARM_USAGE_STACK_OVERFLOW,
        K_ERR_ARM_USAGE_NO_COPROCESSOR,
        K_ERR_ARM_USAGE_ILLEGAL_EXC_RETURN,
        K_ERR_ARM_USAGE_ILLEGAL_EPSR,
        K_ERR_ARM_USAGE_UNDEFINED_INSTRUCTION,
 
        /* Cortex-M SECURE exceptions */
        K_ERR_ARM_SECURE_GENERIC,
        K_ERR_ARM_SECURE_ENTRY_POINT,
        K_ERR_ARM_SECURE_INTEGRITY_SIGNATURE,
        K_ERR_ARM_SECURE_EXCEPTION_RETURN,
        K_ERR_ARM_SECURE_ATTRIBUTION_UNIT,
        K_ERR_ARM_SECURE_TRANSITION,
        K_ERR_ARM_SECURE_LAZY_STATE_PRESERVATION,
        K_ERR_ARM_SECURE_LAZY_STATE_ERROR,
 
        /* Cortex-A/R exceptions*/
        K_ERR_ARM_UNDEFINED_INSTRUCTION,
        K_ERR_ARM_ALIGNMENT_FAULT,
        K_ERR_ARM_BACKGROUND_FAULT,
        K_ERR_ARM_PERMISSION_FAULT,
        K_ERR_ARM_SYNC_EXTERNAL_ABORT,
        K_ERR_ARM_ASYNC_EXTERNAL_ABORT,
        K_ERR_ARM_SYNC_PARITY_ERROR,
        K_ERR_ARM_ASYNC_PARITY_ERROR,
        K_ERR_ARM_DEBUG_EVENT,
        K_ERR_ARM_TRANSLATION_FAULT,
        K_ERR_ARM_UNSUPPORTED_EXCLUSIVE_ACCESS_FAULT
};
 
#endif /* _ASMLANGUAGE */
 
#ifdef CONFIG_STACK_ALIGN_DOUBLE_WORD
#define ARCH_STACK_PTR_ALIGN 8
#else
#define ARCH_STACK_PTR_ALIGN 4
#endif
 
#if defined(CONFIG_USERSPACE)
#define Z_THREAD_MIN_STACK_ALIGN CONFIG_ARM_MPU_REGION_MIN_ALIGN_AND_SIZE
#elif defined(CONFIG_ARM_AARCH32_MMU)
#define Z_THREAD_MIN_STACK_ALIGN CONFIG_ARM_MMU_REGION_MIN_ALIGN_AND_SIZE
#else
#define Z_THREAD_MIN_STACK_ALIGN ARCH_STACK_PTR_ALIGN
#endif
 
#if defined(CONFIG_MPU_STACK_GUARD)
/* make sure there's more than enough space for an exception frame */
#if CONFIG_ARM_MPU_REGION_MIN_ALIGN_AND_SIZE <= 0x20
#define MPU_GUARD_ALIGN_AND_SIZE 0x40
#else
#define MPU_GUARD_ALIGN_AND_SIZE CONFIG_ARM_MPU_REGION_MIN_ALIGN_AND_SIZE
#endif
#else
#define MPU_GUARD_ALIGN_AND_SIZE 0
#endif
 
#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) \
        && defined(CONFIG_MPU_STACK_GUARD)
#if CONFIG_MPU_STACK_GUARD_MIN_SIZE_FLOAT <= 0x20
#define MPU_GUARD_ALIGN_AND_SIZE_FLOAT 0x40
#else
#define MPU_GUARD_ALIGN_AND_SIZE_FLOAT CONFIG_MPU_STACK_GUARD_MIN_SIZE_FLOAT
#endif
#else
#define MPU_GUARD_ALIGN_AND_SIZE_FLOAT 0
#endif
 
#if defined(CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT)
#define Z_MPU_GUARD_ALIGN (MAX(MPU_GUARD_ALIGN_AND_SIZE, \
        MPU_GUARD_ALIGN_AND_SIZE_FLOAT))
#else
#define Z_MPU_GUARD_ALIGN MPU_GUARD_ALIGN_AND_SIZE
#endif
 
#if defined(CONFIG_USERSPACE) && \
        defined(CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT)
/* This MPU requires regions to be sized to a power of two, and aligned to
 * their own size. Since an MPU region must be able to cover the entire
 * user-accessible stack buffer, we size/align to match. The privilege
 * mode stack is generated elsewhere in memory.
 */
#define ARCH_THREAD_STACK_OBJ_ALIGN(size)       Z_POW2_CEIL(size)
#define ARCH_THREAD_STACK_SIZE_ADJUST(size)     Z_POW2_CEIL(size)
#else
#define ARCH_THREAD_STACK_OBJ_ALIGN(size)       MAX(Z_THREAD_MIN_STACK_ALIGN, \
                                                    Z_MPU_GUARD_ALIGN)
#ifdef CONFIG_USERSPACE
#define ARCH_THREAD_STACK_SIZE_ADJUST(size) \
        ROUND_UP(size, CONFIG_ARM_MPU_REGION_MIN_ALIGN_AND_SIZE)
#endif
#endif
 
#ifdef CONFIG_MPU_STACK_GUARD
/* Kernel-only stacks need an MPU guard region programmed at the beginning of
 * the stack object, so align the object appropriately.
 */
#define ARCH_KERNEL_STACK_RESERVED      MPU_GUARD_ALIGN_AND_SIZE
#define ARCH_KERNEL_STACK_OBJ_ALIGN     Z_MPU_GUARD_ALIGN
#endif
 
/* On arm, all MPU guards are carve-outs. */
#define ARCH_THREAD_STACK_RESERVED 0
 
/* Legacy case: retain containing extern "C" with C++ */
#ifdef CONFIG_ARM_MPU
#ifdef CONFIG_CPU_HAS_ARM_MPU
#include <zephyr/arch/arm/mpu/arm_mpu.h>
#endif /* CONFIG_CPU_HAS_ARM_MPU */
#ifdef CONFIG_CPU_HAS_NXP_SYSMPU
#include <zephyr/arch/arm/mpu/nxp_mpu.h>
#endif /* CONFIG_CPU_HAS_NXP_SYSMPU */
#endif /* CONFIG_ARM_MPU */
#ifdef CONFIG_ARM_AARCH32_MMU
#include <zephyr/arch/arm/mmu/arm_mmu.h>
#endif /* CONFIG_ARM_AARCH32_MMU */
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_ARCH_ARM_ARCH_H_ */