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Optimization for physics memory 

Change-Id: Id7765f13d15014c8b19b75156b9f5971cbe99705
This commit is contained in:
Haryslee 2021-03-13 17:34:27 +08:00
parent 856a44ac95
commit c29806a316
2 changed files with 12 additions and 7 deletions
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7
kernel/base/vm/los_vm_page.c
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@ -76,7 +76,12 @@ VOID OsVmPageStartup(VOID)
OsVmPhysAreaSizeAdjust(ROUNDUP((g_vmBootMemBase - KERNEL_ASPACE_BASE), PAGE_SIZE));
nPage = OsVmPhysPageNumGet();
/*
* Pages getting from OsVmPhysPageNumGet() interface here contain the memory
* struct LosVmPage occupied, which satisfies the equation:
* nPage * sizeof(LosVmPage) + nPage * PAGE_SIZE = OsVmPhysPageNumGet() * PAGE_SIZE.
*/
nPage = OsVmPhysPageNumGet() * PAGE_SIZE / (sizeof(LosVmPage) + PAGE_SIZE);
g_vmPageArraySize = nPage * sizeof(LosVmPage);
g_vmPageArray = (LosVmPage *)OsVmBootMemAlloc(g_vmPageArraySize);

12
kernel/base/vm/los_vm_phys.c
View File

@ -108,12 +108,12 @@ VOID OsVmPhysSegAdd(VOID)
VOID OsVmPhysAreaSizeAdjust(size_t size)
{
INT32 i;
for (i = 0; i < (sizeof(g_physArea) / sizeof(g_physArea[0])); i++) {
g_physArea[i].start += size;
g_physArea[i].size -= size;
}
/*
* The first physics memory segment is used for kernel image and kernel heap,
* so just need to adjust the first one here.
*/
g_physArea[0].start += size;
g_physArea[0].size -= size;
}
UINT32 OsVmPhysPageNumGet(VOID)