zephyr/arch/nios2/core/thread.c

63 lines
1.7 KiB
C

/*
* 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>
/* 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(k_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()
*/
k_thread_entry_t entry_point;
void *arg1;
void *arg2;
void *arg3;
/* least recently pushed */
};
void _new_thread(struct k_thread *thread, k_thread_stack_t *stack,
size_t stack_size, k_thread_entry_t thread_func,
void *arg1, void *arg2, void *arg3,
int priority, unsigned int options)
{
char *stack_memory = K_THREAD_STACK_BUFFER(stack);
_ASSERT_VALID_PRIO(priority, thread_func);
struct init_stack_frame *iframe;
_new_thread_init(thread, stack_memory, stack_size, priority, options);
/* 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;
thread->callee_saved.sp = (u32_t)iframe;
thread->callee_saved.ra = (u32_t)_thread_entry_wrapper;
thread->callee_saved.key = NIOS2_STATUS_PIE_MSK;
/* Leave the rest of thread->callee_saved junk */
thread_monitor_init(thread);
}