63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <nano_internal.h>
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#include <kernel_structs.h>
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#include <wait_q.h>
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#include <string.h>
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/* forward declaration to asm function to adjust setup the arguments
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* to _thread_entry() since this arch puts the first four arguments
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* in r4-r7 and not on the stack
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*/
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void _thread_entry_wrapper(_thread_entry_t, void *, void *, void *);
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struct init_stack_frame {
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/* top of the stack / most recently pushed */
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/* Used by _thread_entry_wrapper. pulls these off the stack and
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* into argument registers before calling _thread_entry()
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*/
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_thread_entry_t entry_point;
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void *arg1;
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void *arg2;
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void *arg3;
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/* least recently pushed */
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};
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void _new_thread(struct k_thread *thread, k_thread_stack_t stack,
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size_t stack_size, _thread_entry_t thread_func,
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void *arg1, void *arg2, void *arg3,
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int priority, unsigned int options)
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{
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char *stack_memory = K_THREAD_STACK_BUFFER(stack);
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_ASSERT_VALID_PRIO(priority, thread_func);
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struct init_stack_frame *iframe;
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_new_thread_init(thread, stack_memory, stack_size, priority, options);
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/* Initial stack frame data, stored at the base of the stack */
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iframe = (struct init_stack_frame *)
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STACK_ROUND_DOWN(stack_memory + stack_size - sizeof(*iframe));
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/* Setup the initial stack frame */
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iframe->entry_point = thread_func;
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iframe->arg1 = arg1;
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iframe->arg2 = arg2;
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iframe->arg3 = arg3;
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thread->callee_saved.sp = (u32_t)iframe;
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thread->callee_saved.ra = (u32_t)_thread_entry_wrapper;
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thread->callee_saved.key = NIOS2_STATUS_PIE_MSK;
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/* Leave the rest of thread->callee_saved junk */
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thread_monitor_init(thread);
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}
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