| /* |
| * Copyright (c) 2013-2016 Wind River Systems, Inc. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file |
| * @brief Private kernel definitions (ARM) |
| * |
| * This file contains private kernel function definitions and various |
| * other definitions for the ARM Cortex-M3 processor architecture. |
| * |
| * This file is also included by assembly language files which must #define |
| * _ASMLANGUAGE before including this header file. Note that kernel |
| * assembly source files obtains structure offset values via "absolute symbols" |
| * in the offsets.o module. |
| */ |
| |
| /* this file is only meant to be included by kernel_structs.h */ |
| |
| #ifndef _kernel_arch_func__h_ |
| #define _kernel_arch_func__h_ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifndef _ASMLANGUAGE |
| extern void _FaultInit(void); |
| extern void _CpuIdleInit(void); |
| static ALWAYS_INLINE void kernel_arch_init(void) |
| { |
| _InterruptStackSetup(); |
| _ExcSetup(); |
| _FaultInit(); |
| _CpuIdleInit(); |
| } |
| |
| static ALWAYS_INLINE void |
| _arch_switch_to_main_thread(struct k_thread *main_thread, |
| k_thread_stack_t main_stack, |
| size_t main_stack_size, _thread_entry_t _main) |
| { |
| /* get high address of the stack, i.e. its start (stack grows down) */ |
| char *start_of_main_stack; |
| |
| start_of_main_stack = |
| K_THREAD_STACK_BUFFER(main_stack) + main_stack_size; |
| start_of_main_stack = (void *)STACK_ROUND_DOWN(start_of_main_stack); |
| |
| _current = main_thread; |
| |
| /* the ready queue cache already contains the main thread */ |
| |
| __asm__ __volatile__( |
| |
| /* move to main() thread stack */ |
| "msr PSP, %0 \t\n" |
| |
| /* unlock interrupts */ |
| #ifdef CONFIG_ARMV6_M |
| "cpsie i \t\n" |
| #elif defined(CONFIG_ARMV7_M) |
| "movs %%r1, #0 \n\t" |
| "msr BASEPRI, %%r1 \n\t" |
| #else |
| #error Unknown ARM architecture |
| #endif /* CONFIG_ARMV6_M */ |
| |
| /* branch to _thread_entry(_main, 0, 0, 0) */ |
| "mov %%r0, %1 \n\t" |
| "bx %2 \t\n" |
| |
| /* never gets here */ |
| |
| : |
| : "r"(start_of_main_stack), |
| "r"(_main), "r"(_thread_entry) |
| |
| : "r0", "r1", "sp" |
| ); |
| |
| CODE_UNREACHABLE; |
| } |
| |
| static ALWAYS_INLINE void |
| _set_thread_return_value(struct k_thread *thread, unsigned int value) |
| { |
| thread->arch.swap_return_value = value; |
| } |
| |
| extern void k_cpu_atomic_idle(unsigned int key); |
| |
| #define _is_in_isr() _IsInIsr() |
| |
| extern void _IntLibInit(void); |
| |
| #endif /* _ASMLANGUAGE */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _kernel_arch_func__h_ */ |