4338552175
For the case of building Zephy with no-multithreading support (CONFIG_MULTITHREADING=n) we introduce a custom (ARCH-specific) function to switch to main() from cstart(). This is required, since the Cortex-M initialization code is temporarily using the interrupt stack and main() should be using the z_main_stack, instead. The function performs the PSP switching, the PSPLIM setting (for ARMv8-M), FPU initialization and static memory region initialization, to mimic what the normal (CONFIG_MULTITHREADING=y) case does. Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
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* Copyright (c) 2013-2016 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 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-A/R/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_AARCH32_KERNEL_ARCH_FUNC_H_
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#define ZEPHYR_ARCH_ARM_INCLUDE_AARCH32_KERNEL_ARCH_FUNC_H_
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#include <kernel_arch_data.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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#endif /* CONFIG_ARM_MPU */
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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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}
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static ALWAYS_INLINE void
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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) && defined(CONFIG_CPU_CORTEX_M)
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extern FUNC_NORETURN void z_arm_switch_to_main_no_multithreading(
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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 \
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z_arm_switch_to_main_no_multithreading
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#endif /* !CONFIG_MULTITHREADING && CONFIG_CPU_CORTEX_M */
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extern FUNC_NORETURN void z_arm_userspace_enter(k_thread_entry_t user_entry,
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void *p1, void *p2, void *p3,
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uint32_t stack_end,
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uint32_t stack_start);
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extern void z_arm_fatal_error(unsigned int reason, const z_arch_esf_t *esf);
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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_AARCH32_KERNEL_ARCH_FUNC_H_ */
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