101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <nano_private.h>
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#include <wait_q.h>
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#include <timeout_q.h>
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#include <string.h>
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tNANO _nanokernel = {0};
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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, _thread_arg_t,
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_thread_arg_t, _thread_arg_t);
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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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_thread_arg_t arg1;
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_thread_arg_t arg2;
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_thread_arg_t arg3;
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/* least recently pushed */
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};
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void _new_thread(char *stack_memory, unsigned stack_size,
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void *uk_task_ptr, _thread_entry_t thread_func,
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_thread_arg_t arg1, _thread_arg_t arg2,
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_thread_arg_t arg3,
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int priority, unsigned options)
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{
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struct tcs *tcs;
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struct init_stack_frame *iframe;
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#ifdef CONFIG_INIT_STACKS
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memset(stack_memory, 0xaa, stack_size);
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#endif
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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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/* Initialize various struct tcs members */
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tcs = (struct tcs *)stack_memory;
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tcs->link = (struct tcs *)NULL;
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tcs->prio = priority;
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if (priority == -1) {
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tcs->flags = PREEMPTIBLE | TASK;
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} else {
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tcs->flags = FIBER;
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}
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#ifdef CONFIG_THREAD_CUSTOM_DATA
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/* Initialize custom data field (value is opaque to kernel) */
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tcs->custom_data = NULL;
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#endif
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#ifdef CONFIG_MICROKERNEL
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tcs->uk_task_ptr = uk_task_ptr;
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#else
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ARG_UNUSED(uk_task_ptr);
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#endif
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tcs->coopReg.sp = (uint32_t)iframe;
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tcs->coopReg.ra = (uint32_t)_thread_entry_wrapper;
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tcs->coopReg.key = NIOS2_STATUS_PIE_MSK;
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/* Leave the rest of tcs->coopReg junk */
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#ifdef CONFIG_NANO_TIMEOUTS
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_nano_timeout_tcs_init(tcs);
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#endif
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}
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