caafe23891
This commit updates cortex_m related code to align it with the rules from .clang-format. This is done to simplify future changes in these files as we are about to implement use_switch support. Some rules conflict with checkpatch and therefore some small part of the code locally disable clang-format. Signed-off-by: Wilfried Chauveau <wilfried.chauveau@arm.com>
106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
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* Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
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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 Private kernel definitions (ARM)
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*
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* This file contains private kernel function definitions and various
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* other definitions for the 32-bit ARM Cortex-M processor architecture
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* family.
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*
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* This file is also included by assembly language files which must #define
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* _ASMLANGUAGE before including this header file. Note that kernel
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* assembly source files obtains structure offset values via "absolute symbols"
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* in the offsets.o module.
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*/
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#ifndef ZEPHYR_ARCH_ARM_INCLUDE_CORTEX_M_KERNEL_ARCH_FUNC_H_
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#define ZEPHYR_ARCH_ARM_INCLUDE_CORTEX_M_KERNEL_ARCH_FUNC_H_
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#include <zephyr/platform/hooks.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _ASMLANGUAGE
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extern void z_arm_fault_init(void);
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extern void z_arm_cpu_idle_init(void);
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#ifdef CONFIG_ARM_MPU
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extern void z_arm_configure_static_mpu_regions(void);
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extern void z_arm_configure_dynamic_mpu_regions(struct k_thread *thread);
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extern int z_arm_mpu_init(void);
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#endif /* CONFIG_ARM_MPU */
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#ifdef CONFIG_ARM_AARCH32_MMU
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extern int z_arm_mmu_init(void);
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#endif /* CONFIG_ARM_AARCH32_MMU */
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static ALWAYS_INLINE void arch_kernel_init(void)
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{
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z_arm_interrupt_stack_setup();
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z_arm_exc_setup();
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z_arm_fault_init();
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z_arm_cpu_idle_init();
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z_arm_clear_faults();
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#if defined(CONFIG_ARM_MPU)
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z_arm_mpu_init();
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/* Configure static memory map. This will program MPU regions,
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* to set up access permissions for fixed memory sections, such
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* as Application Memory or No-Cacheable SRAM area.
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*
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* This function is invoked once, upon system initialization.
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*/
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z_arm_configure_static_mpu_regions();
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#endif /* CONFIG_ARM_MPU */
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#ifdef CONFIG_SOC_PER_CORE_INIT_HOOK
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soc_per_core_init_hook();
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#endif /* CONFIG_SOC_PER_CORE_INIT_HOOK */
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}
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static ALWAYS_INLINE void arch_thread_return_value_set(struct k_thread *thread, unsigned int value)
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{
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thread->arch.swap_return_value = value;
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}
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#if !defined(CONFIG_MULTITHREADING)
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extern FUNC_NORETURN void z_arm_switch_to_main_no_multithreading(k_thread_entry_t main_func,
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void *p1, void *p2, void *p3);
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#define ARCH_SWITCH_TO_MAIN_NO_MULTITHREADING z_arm_switch_to_main_no_multithreading
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#endif /* !CONFIG_MULTITHREADING */
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extern FUNC_NORETURN void z_arm_userspace_enter(k_thread_entry_t user_entry, void *p1, void *p2,
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void *p3, uint32_t stack_end, uint32_t stack_start);
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extern void z_arm_fatal_error(unsigned int reason, const struct arch_esf *esf);
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static ALWAYS_INLINE int arch_swap(unsigned int key)
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{
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/* store off key and return value */
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_current->arch.basepri = key;
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_current->arch.swap_return_value = -EAGAIN;
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/* set pending bit to make sure we will take a PendSV exception */
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SCB->ICSR |= SCB_ICSR_PENDSVSET_Msk;
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/* clear mask or enable all irqs to take a pendsv */
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irq_unlock(0);
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/* Context switch is performed here. Returning implies the
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* thread has been context-switched-in again.
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*/
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return _current->arch.swap_return_value;
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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_ARCH_ARM_INCLUDE_CORTEX_M_KERNEL_ARCH_FUNC_H_ */
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