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Change-Id: Id4294f30faced84d3e6fd6d5e61e1111bf287a37
diff --git a/mcu/service/mertos/include/mer_kernel_task.h b/mcu/service/mertos/include/mer_kernel_task.h
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+/*****************************************************************************
+*  Copyright Statement:
+*  --------------------
+*  This software is protected by Copyright and the information contained
+*  herein is confidential. The software may not be copied and the information
+*  contained herein may not be used or disclosed except with the written
+*  permission of MediaTek Inc. (C) 2018
+*
+*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
+*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
+*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
+*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
+*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
+*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
+*  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
+*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
+*  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
+*  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
+*  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
+*  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
+*
+*  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
+*  LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
+*  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
+*  OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
+*  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
+*
+*  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
+*  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
+*  LAWS PRINCIPLES.  ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
+*  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
+*  THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
+*
+*****************************************************************************/
+
+/*****************************************************************************
+*
+* Filename:
+* ---------
+*   mer_kernel_task.h
+*
+* Project:
+* --------
+*   MERTOS
+*
+* Description:
+* ------------
+*   Declare task related API header.
+*
+* Author:
+* -------
+ * -------
+*
+*****************************************************************************/
+#ifndef _MER_KERNEL_TASK_H_
+#define _MER_KERNEL_TASK_H_
+
+#include "mer_kernel_config_public.h"
+#include "mer_kernel_scheduler.h"
+#include "mer_service_task.h"
+#include "mer_kernel_switch_target.h"
+#include "mer_kernel_lock_target.h"
+#include "mer_config_public.h"
+#include <stddef.h>
+
+///////////////////////////////////////////////////////////////////////////////
+// Porting variable
+///////////////////////////////////////////////////////////////////////////////
+typedef mer_service_task_cb             mer_kernel_task_cb;
+
+/* Make sure the sp is the first element in the control block */
+MER_CASSERT(offsetof(mer_kernel_task_cb, stack_ptr) == 0);
+
+/* Make sure the offset of stack_end in the control block matches with ASM */
+#if defined(__MD97__) || defined(__MD97P__)
+#include "mer_kernel_switch_target_shaolin.inc"
+MER_CASSERT(offsetof(mer_kernel_task_cb, last_execution_vpe) == MER_KERNEL_SWITCH_LAST_EXE_VPE_OFFSET);
+#endif /* defined(__MD97__) || defined(__MD97P__) */
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Macro
+///////////////////////////////////////////////////////////////////////////////
+#define MER_KERNEL_TASK_LEVEL_BIT                   31
+#define MER_KERNEL_TASK_LEVEL_MASK                  (1 << MER_KERNEL_TASK_LEVEL_BIT)
+#define MER_KERNEL_TASK_APPEND_PRIORITY(task_id)    ((1 << MER_KERNEL_TASK_LEVEL_BIT) | (task_id))
+#define MER_KERNEL_TASK_REMOVE_PRIORITY(task_id)    ((~(1 << MER_KERNEL_TASK_LEVEL_BIT)) & (task_id))
+#define MER_KERNEL_TASK_NUM                         mer_kernel_task_num
+#define MER_KERNEL_TASK_MASK_NUM                    mer_kernel_task_mask_num
+#define MER_KERNEL_TASK_TOP_MASK_NUM                mer_kernel_task_top_mask_num
+
+/* context means it is either preempted by ISR or running */
+/* For task, it is either bit 31 or bit 29 */
+#define MER_KERNEL_TASK_CONTEXT_MASK                (MER_KERNEL_TASK_LEVEL_MASK | (1 << (MER_KERNEL_TASK_LEVEL_BIT-2)))
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Enum
+/////////////////////////////////////////////////////////////////////////////// 
+
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Structure
+///////////////////////////////////////////////////////////////////////////////
+typedef struct {
+    mer_uint32 *mask;
+} mer_kernel_task_top_mask;
+
+typedef struct {
+    mer_uint32 *mask;
+} mer_kernel_task_mask;
+
+typedef mer_uint32             mer_kernel_task_id;
+///////////////////////////////////////////////////////////////////////////////
+// External variable
+///////////////////////////////////////////////////////////////////////////////
+
+extern mer_kernel_task_cb               mer_kernel_task_info_table[];
+extern mer_uint8                        mer_kernel_task_dummy_stack[];
+ 
+extern mer_kernel_task_top_mask    mer_kernel_task_top_ready_mask[MIPS_HW_VPE_NUM];
+extern mer_kernel_task_mask        mer_kernel_task_ready_mask[MIPS_HW_VPE_NUM];
+
+extern mer_uint32 mer_kernel_task_info_table_begin;
+extern mer_uint32 mer_kernel_task_info_table_end;
+
+extern mer_uint32 mer_kernel_task_idle_priority_begin;
+
+extern const mer_uint32 mer_kernel_task_num;
+extern const mer_uint32 mer_kernel_task_mask_num;
+extern const mer_uint32 mer_kernel_task_top_mask_num;  
+
+///////////////////////////////////////////////////////////////////////////////
+// External functions
+///////////////////////////////////////////////////////////////////////////////
+void mer_kernel_task_remove(mer_kernel_task_id);
+void mer_kernel_task_insert(mer_kernel_task_id);
+void mer_kernel_task_set_running_state(mer_kernel_task_id task_id);
+void mer_kernel_task_update_ready_job(mer_uint32 vpe_id);
+void mer_kernel_task_suspend(mer_kernel_task_id task_id, mer_service_task_state suspend_reason);
+void mer_kernel_task_resume(mer_kernel_task_cb* cb, mer_service_task_state suspend_reason);
+void mer_kernel_task_initialization();
+void mer_kernel_task_default_main();
+void mer_kernel_task_set_priority(mer_kernel_task_id source, mer_kernel_task_id target_priority);
+void mer_kernel_task_change_current_affinity(mer_uint32 affinity_mask);
+void mer_kernel_task_set_affinity_to_current_vpe();
+void mer_kernel_task_resume_and_return(mer_kernel_task_cb* cb, mer_service_task_state suspend_reason);
+
+#if defined(__MER_CONFIG_USE_DYNAMIC_ALLOCATION__)
+void mer_kernel_task_stack_allocation();
+#endif /* __MER_CONFIG_USE_DYNAMIC_ALLOCATION__ */
+
+///////////////////////////////////////////////////////////////////////////////
+// Static inline functions
+///////////////////////////////////////////////////////////////////////////////
+/**
+ * Return the task priority by cb
+ *  Note that this function assume the schedule lock is taken
+ * 
+ * Time complexity O(1)
+ * 
+ * @param[out] The task priority
+ * @param[in] cb
+ * 
+ */
+static inline mer_kernel_task_id mer_kernel_task_get_priority(mer_kernel_task_cb *cb){
+    
+    return cb->priority;
+}
+
+/**
+ * Return the inheritor task index by cb
+ * Note that this function assume the schedule lock is taken
+ * 
+ * Time complexity O(1)
+ * 
+ * @param[out] The inheritor task index
+ * @param[in] cb
+ * 
+ */
+static inline mer_kernel_task_id mer_kernel_task_get_inheritor_task_index(mer_kernel_task_cb *cb){
+    
+    return cb->inheritor_task_index;
+}
+
+/**
+ * Return the  task index with cb pointer
+ *  
+ * 
+ * Time complexity O(1)
+ * 
+ * @param[out] Index of input cb pointer
+ * @param[in] The task pointer
+ * 
+ */
+static inline mer_uint32 mer_kernel_task_get_index(mer_kernel_task_cb *cb){
+    
+    //return (mer_uint32)(cb - mer_kernel_task_info_table);
+    return (mer_uint32) cb->job_index;
+}
+
+/**
+ * Return the current running task priority
+ *  Note that this function assume the schedule lock is taken
+ * 
+ * If we have private memory, no need lock anymore
+ *
+ * Time complexity O(1)
+ * 
+ * @param[out] The current task id
+ * @param[in] vpe_id
+ * 
+ */
+static inline mer_kernel_task_id mer_kernel_task_get_current_priority(){
+#if defined(__MER_KERNEL_USE_MIPS_CP0_CONTEXT_REG__)
+    mer_kernel_task_cb *cb = (mer_kernel_task_cb *)(MER_KERNEL_GET_CURRENT_CONTROL_BLOCK());
+    return cb->priority;
+#else
+    mer_uint32 current_vpe = mer_kernel_utility_get_current_vpe_id(); 
+    return MER_KERNEL_TASK_REMOVE_PRIORITY(mer_kernel_scheduler_running_job[current_vpe].priority);
+#endif
+}
+/**
+ * Return the current running task index
+ *  Note that this function assume the schedule lock is taken
+ * 
+ * If we have private memory, no need lock anymore
+ *
+ * Time complexity O(1)
+ * 
+ * @param[out] The current task id
+ * @param[in] vpe_id
+ * 
+ */
+__attribute__((always_inline)) static inline mer_kernel_task_id mer_kernel_task_get_current_index(){
+    
+#if defined(__MER_KERNEL_USE_MIPS_CP0_CONTEXT_REG__)
+    mer_kernel_task_cb *cb = (mer_kernel_task_cb *)(MER_KERNEL_GET_CURRENT_CONTROL_BLOCK());
+    return mer_kernel_task_get_index(cb);
+#else
+    mer_uint32 current_vpe = mer_kernel_utility_get_current_vpe_id(); 
+    return mer_kernel_scheduler_running_job[current_vpe].job_index;
+#endif /* __MER_KERNEL_USE_MIPS_CP0_CONTEXT_REG__ */
+}
+
+/**
+ * Return the current running task cb pointer
+ * Note that this function assume the schedule lock is taken
+ * 
+ * If we have private memory, no need lock anymore
+ *
+ * Time complexity O(1)
+ * 
+ * @param[out] cb pointer
+ * @param[in] vpe_id
+ * 
+ */
+static inline mer_kernel_task_cb * mer_kernel_task_get_current_cb(){
+#if defined(__MER_KERNEL_USE_MIPS_CP0_CONTEXT_REG__)
+    return (mer_kernel_task_cb *)(MER_KERNEL_GET_CURRENT_CONTROL_BLOCK());
+#else
+    mer_uint32 current_vpe = mer_kernel_utility_get_current_vpe_id(); 
+    mer_uint32 job_index = mer_kernel_scheduler_running_job[current_vpe].job_index;
+    return &mer_kernel_task_info_table[job_index];
+#endif /* __MER_KERNEL_USE_MIPS_CP0_CONTEXT_REG__ */
+}
+
+/**
+ * Return the state of specified task control block
+ *  
+ * 
+ * Time complexity O(1)
+ * 
+ * @param[out] State of input cb pointer
+ * @param[in] The task pointer
+ * 
+ */
+static inline mer_service_task_state mer_kernel_task_get_state(mer_kernel_task_cb *cb){
+    
+    return cb->state;
+}
+
+#endif /* _MER_KERNEL_TASK_H_ */
+