116 lines
3.1 KiB
C
116 lines
3.1 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 <kernel.h> /* public kernel API */
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#include <../../../kernel/unified/include/nano_internal.h>
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#include <nano_private.h>
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#include <wait_q.h>
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#include <string.h>
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tNANO _nanokernel = {0};
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#if defined(CONFIG_THREAD_MONITOR)
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/*
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* Add a thread to the kernel's list of active threads.
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*/
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static ALWAYS_INLINE void thread_monitor_init(struct tcs *tcs)
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{
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unsigned int key;
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key = irq_lock();
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tcs->next_thread = _nanokernel.threads;
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_nanokernel.threads = tcs;
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irq_unlock(key);
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}
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#else
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#define thread_monitor_init(tcs) \
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do {/* do nothing */ \
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} while ((0))
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#endif /* CONFIG_THREAD_MONITOR */
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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(char *stack_memory, unsigned stack_size,
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void *uk_task_ptr, _thread_entry_t thread_func,
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void *arg1, void *arg2, void *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->prio = priority;
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/* k_q_node initialized upon first insertion in a list */
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tcs->flags = options | K_PRESTART;
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tcs->sched_locked = 0;
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/* static threads overwrite it afterwards with real value */
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tcs->init_data = NULL;
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tcs->fn_abort = NULL;
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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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ARG_UNUSED(uk_task_ptr);
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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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thread_monitor_init(tcs);
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}
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