los_vm_page.h

/*
 * Copyright (c) 2013-2019, Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020, Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

#ifndef __LOS_VM_PAGE_H__
#define __LOS_VM_PAGE_H__

#include "los_typedef.h"
#include "los_bitmap.h"
#include "los_list.h"
#include "los_atomic.h"

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

typedef struct VmPage {
    LOS_DL_LIST         node;        /**< vm object dl list */
    UINT32              index;       /**< vm page index to vm object */
    PADDR_T             physAddr;    /**< vm page physical addr */
    Atomic              refCounts;   /**< vm page ref count */
    UINT32              flags;       /**< vm page flags */
    UINT8               order;       /**< vm page in which order list */
    UINT8               segID;       /**< the segment id of vm page */
    UINT16              nPages;      /**< the vm page is used for kernel heap */
} LosVmPage;

extern LosVmPage *g_vmPageArray;
extern size_t g_vmPageArraySize;

LosVmPage *LOS_VmPageGet(PADDR_T paddr);
VOID OsVmPageStartup(VOID);

#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */

#endif /* __LOS_VM_PAGE_H__ */