ApfelTeeSaft/reactos
1
0
Fork 0
mirror of https://github.com/ApfelTeeSaft/reactos.git synced 2026-09-01 04:13:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

Unmap accessible, but completely unneeded by kernel memory too

Browse Source 
svn path=/branches/winldr/; revision=25538
This commit is contained in:
Aleksey Bragin
2007-01-19 22:23:58 +00:00
parent 73948584ab
commit 8782e641b6
1 changed files with 25 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
windows/wlmemory.c
+25 -14
View File
@@ -273,24 +273,32 @@ MempDisablePages()
for (i=0; i<MadCount; i++)
{
if (Mad[i].MemoryType == LoaderFirmwarePermanent ||
Mad[i].MemoryType == LoaderSpecialMemory)
{
ULONG StartPage, EndPage, Page;
ULONG StartPage, EndPage, Page;
StartPage = Mad[i].BasePage;
EndPage = Mad[i].BasePage + Mad[i].PageCount;
StartPage = Mad[i].BasePage;
EndPage = Mad[i].BasePage + Mad[i].PageCount;
if (Mad[i].MemoryType == LoaderFirmwarePermanent ||
Mad[i].MemoryType == LoaderSpecialMemory ||
Mad[i].MemoryType == LoaderFree ||
(Mad[i].MemoryType == LoaderFirmwareTemporary && EndPage <= LOADER_HIGH_ZONE) ||
Mad[i].MemoryType == LoaderOsloaderStack ||
Mad[i].MemoryType == LoaderLoadedProgram)
{
//
// But, the first megabyte of memory always stays!
// And, to tell the truth, we don't care about what's higher
// than LOADER_HIGH_ZONE
if (StartPage < 0x100)
StartPage = 0x100;
if (EndPage > LOADER_HIGH_ZONE)
EndPage = LOADER_HIGH_ZONE;
if (Mad[i].MemoryType == LoaderFirmwarePermanent ||
Mad[i].MemoryType == LoaderSpecialMemory)
{
if (StartPage < 0x100)
StartPage = 0x100;
if (EndPage > LOADER_HIGH_ZONE)
EndPage = LOADER_HIGH_ZONE;
}
for (Page = StartPage; Page < EndPage; Page++)
{
@@ -301,9 +309,12 @@ MempDisablePages()
{
KernelPT = (PHARDWARE_PTE)(PDE[Entry].PageFrameNumber << MM_PAGE_SHIFT);
KernelPT[Page & 0x3ff].PageFrameNumber = 0;
KernelPT[Page & 0x3ff].Valid = 0;
KernelPT[Page & 0x3ff].Write = 0;
if (KernelPT)
{
KernelPT[Page & 0x3ff].PageFrameNumber = 0;
KernelPT[Page & 0x3ff].Valid = 0;
KernelPT[Page & 0x3ff].Write = 0;
}
}
}
}