140 lines
4.6 KiB
C
Executable File
140 lines
4.6 KiB
C
Executable File
/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "los_vm_page.h"
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#include "los_vm_common.h"
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#include "los_vm_phys.h"
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#include "los_vm_boot.h"
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#include "los_vm_filemap.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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#ifdef LOSCFG_KERNEL_VM
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LosVmPage *g_vmPageArray = NULL;
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size_t g_vmPageArraySize;
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STATIC VOID OsVmPageInit(LosVmPage *page, paddr_t pa, UINT8 segID)
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{
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LOS_ListInit(&page->node);
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page->flags = FILE_PAGE_FREE;
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LOS_AtomicSet(&page->refCounts, 0);
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page->physAddr = pa;
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page->segID = segID;
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page->order = VM_LIST_ORDER_MAX;
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page->nPages = 0;
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}
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STATIC INLINE VOID OsVmPageOrderListInit(LosVmPage *page, size_t nPages)
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{
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OsVmPhysPagesFreeContiguous(page, nPages);
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}
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#define VMPAGEINIT(page, pa, segID) do { \
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OsVmPageInit(page, pa, segID); \
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(page)++; \
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(pa) += PAGE_SIZE; \
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} while (0)
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VOID OsVmPageStartup(VOID)
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{
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struct VmPhysSeg *seg = NULL;
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LosVmPage *page = NULL;
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paddr_t pa;
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UINT32 nPage;
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INT32 segID;
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OsVmPhysAreaSizeAdjust(ROUNDUP((g_vmBootMemBase - KERNEL_ASPACE_BASE), PAGE_SIZE));
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/*
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* Pages getting from OsVmPhysPageNumGet() interface here contain the memory
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* struct LosVmPage occupied, which satisfies the equation:
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* nPage * sizeof(LosVmPage) + nPage * PAGE_SIZE = OsVmPhysPageNumGet() * PAGE_SIZE.
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*/
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nPage = OsVmPhysPageNumGet() * PAGE_SIZE / (sizeof(LosVmPage) + PAGE_SIZE);
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g_vmPageArraySize = nPage * sizeof(LosVmPage);
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g_vmPageArray = (LosVmPage *)OsVmBootMemAlloc(g_vmPageArraySize);
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OsVmPhysAreaSizeAdjust(ROUNDUP(g_vmPageArraySize, PAGE_SIZE));
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OsVmPhysSegAdd();
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OsVmPhysInit();
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for (segID = 0; segID < g_vmPhysSegNum; segID++) {
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seg = &g_vmPhysSeg[segID];
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nPage = seg->size >> PAGE_SHIFT;
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UINT32 count = nPage >> 3; /* 3: 2 ^ 3, nPage / 8, cycle count */
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UINT32 left = nPage & 0x7; /* 0x7: nPage % 8, left page */
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for (page = seg->pageBase, pa = seg->start; count > 0; count--) {
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/* note: process large amount of data, optimize performance */
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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VMPAGEINIT(page, pa, segID);
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}
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for (; left > 0; left--) {
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VMPAGEINIT(page, pa, segID);
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}
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OsVmPageOrderListInit(seg->pageBase, nPage);
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}
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}
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LosVmPage *LOS_VmPageGet(PADDR_T paddr)
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{
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INT32 segID;
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LosVmPage *page = NULL;
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for (segID = 0; segID < g_vmPhysSegNum; segID++) {
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page = OsVmPhysToPage(paddr, segID);
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if (page != NULL) {
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break;
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}
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}
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return page;
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}
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#endif
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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