| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <kernel.h> |
| #include <nano_internal.h> |
| #include <kernel_structs.h> |
| #include <wait_q.h> |
| #include <string.h> |
| |
| #if defined(CONFIG_THREAD_MONITOR) |
| /* |
| * Add a thread to the kernel's list of active threads. |
| */ |
| static ALWAYS_INLINE void thread_monitor_init(struct k_thread *thread) |
| { |
| unsigned int key; |
| |
| key = irq_lock(); |
| thread->next_thread = _kernel.threads; |
| _kernel.threads = thread; |
| irq_unlock(key); |
| } |
| #else |
| #define thread_monitor_init(thread) \ |
| do {/* do nothing */ \ |
| } while ((0)) |
| #endif /* CONFIG_THREAD_MONITOR */ |
| |
| /* forward declaration to asm function to adjust setup the arguments |
| * to _thread_entry() since this arch puts the first four arguments |
| * in r4-r7 and not on the stack |
| */ |
| void _thread_entry_wrapper(_thread_entry_t, void *, void *, void *); |
| |
| struct init_stack_frame { |
| /* top of the stack / most recently pushed */ |
| |
| /* Used by _thread_entry_wrapper. pulls these off the stack and |
| * into argument registers before calling _thread_entry() |
| */ |
| _thread_entry_t entry_point; |
| void *arg1; |
| void *arg2; |
| void *arg3; |
| |
| /* least recently pushed */ |
| }; |
| |
| |
| void _new_thread(char *stack_memory, size_t stack_size, |
| _thread_entry_t thread_func, |
| void *arg1, void *arg2, void *arg3, |
| int priority, unsigned options) |
| { |
| _ASSERT_VALID_PRIO(priority, thread_func); |
| |
| struct k_thread *thread; |
| struct init_stack_frame *iframe; |
| |
| #ifdef CONFIG_INIT_STACKS |
| memset(stack_memory, 0xaa, stack_size); |
| #endif |
| /* Initial stack frame data, stored at the base of the stack */ |
| iframe = (struct init_stack_frame *) |
| STACK_ROUND_DOWN(stack_memory + stack_size - sizeof(*iframe)); |
| |
| /* Setup the initial stack frame */ |
| iframe->entry_point = thread_func; |
| iframe->arg1 = arg1; |
| iframe->arg2 = arg2; |
| iframe->arg3 = arg3; |
| |
| /* Initialize various struct k_thread members */ |
| thread = (struct k_thread *)stack_memory; |
| |
| _init_thread_base(&thread->base, priority, _THREAD_PRESTART, options); |
| |
| /* static threads overwrite it afterwards with real value */ |
| thread->init_data = NULL; |
| thread->fn_abort = NULL; |
| |
| #ifdef CONFIG_THREAD_CUSTOM_DATA |
| /* Initialize custom data field (value is opaque to kernel) */ |
| thread->custom_data = NULL; |
| #endif |
| thread->callee_saved.sp = (uint32_t)iframe; |
| thread->callee_saved.ra = (uint32_t)_thread_entry_wrapper; |
| thread->callee_saved.key = NIOS2_STATUS_PIE_MSK; |
| /* Leave the rest of thread->callee_saved junk */ |
| |
| thread_monitor_init(thread); |
| } |