First commit XiUOS

kernel/thread/idle.c

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+/*
+* Copyright (c) 2020 AIIT XUOS Lab
+* XiUOS is licensed under Mulan PSL v2.
+* You can use this software according to the terms and conditions of the Mulan PSL v2.
+* You may obtain a copy of Mulan PSL v2 at:
+*        http://license.coscl.org.cn/MulanPSL2
+* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+* See the Mulan PSL v2 for more details.
+*/
+
+/**
+* @file:    idle.c
+* @brief:   idle file
+* @version: 1.0
+* @author:  AIIT XUOS Lab
+* @date:    2020/3/15
+*
+*/
+
+#include <xiuos.h>
+#include <xs_hook.h>
+#include <xs_spinlock.h>
+
+#if defined (KERNEL_HOOK)
+#ifndef KERNEL_IDLE_HOOK
+#define KERNEL_IDLE_HOOK
+#endif
+#endif
+
+#ifndef IDLE_KTASK_STACKSIZE
+#define IDLE_KTASK_STACKSIZE  256
+#endif
+
+#ifdef ARCH_SMP
+#define CORE_NUM CPU_NUMBERS
+#else
+#define CORE_NUM 1
+#endif
+
+
+static int32 idle[CORE_NUM];
+__attribute__((aligned(MEM_ALIGN_SIZE)))
+
+void RunningIntoLowPowerMode()
+{
+#ifdef ARCH_ARM 
+    __asm volatile("WFI");    
+#endif
+
+#ifdef ARCH_RISCV 
+    asm volatile ("wfi");
+#endif
+}
+
+static void IdleKTaskEntry(void *arg)
+{
+    while (1) {
+#ifdef KERNEL_IDLE_HOOK
+        HOOK(hook.idle.hook_Idle,());
+#endif
+        RunningIntoLowPowerMode();
+    }
+}
+/**
+ *
+ * init system idle task,then startup the idle task
+ *
+ */
+void InitIdleKTask(void)
+{
+    uint8 coreid = 0;
+    char ktaskidle[NAME_NUM_MAX] = {0};
+
+    for (coreid = 0; coreid < CORE_NUM; coreid++) {
+        sprintf(ktaskidle, "ktaskidle%d", coreid);
+
+        idle[coreid] = KTaskCreate(ktaskidle,IdleKTaskEntry,NONE,IDLE_KTASK_STACKSIZE,KTASK_LOWEST_PRIORITY);
+
+#ifdef ARCH_SMP
+        KTaskCoreCombine(idle[coreid], coreid);
+#endif
+        StartupKTask(idle[coreid]);
+    }
+}
+
+/**
+ *
+ * This function will return the idle task descriptor
+ *
+ */
+KTaskDescriptorType GetIdleKTaskDescripter(void)
+{
+    KTaskDescriptorType idle_p = NONE;
+
+#ifdef ARCH_SMP
+    register int id = GetCpuId();
+#else
+    register int id = 0;
+#endif
+
+    idle_p = CONTAINER_OF(&idle[id], struct TaskDescriptor, id);
+    return  idle_p;
+}