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- Added a boot option for reducing the used memory size ('/maxmem=used_memory_in_mb').

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svn path=/trunk/; revision=4890
This commit is contained in:
Hartmut Birr 2003-06-14 17:46:24 +00:00
parent 2e437e9b34
commit 07dd3a3809
3 changed files with 46 additions and 7 deletions
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3
reactos/ntoskrnl/include/internal/mm.h
View file

@ -319,7 +319,8 @@ VOID MmInit1(ULONG FirstKernelPhysAddress,
ULONG LastKernelPhysAddress,
ULONG LastKernelAddress,
PADDRESS_RANGE BIOSMemoryMap,
ULONG AddressRangeCount);
ULONG AddressRangeCount,
ULONG MaxMemInMeg);
VOID MmInit2(VOID);
VOID MmInit3(VOID);
NTSTATUS MmInitPagerThread(VOID);

37
reactos/ntoskrnl/ke/main.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: main.c,v 1.160 2003/06/07 16:16:39 chorns Exp $
/* $Id: main.c,v 1.161 2003/06/14 17:46:24 hbirr Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/ke/main.c
@ -314,6 +314,8 @@ ExpInitializeExecutive(VOID)
CHAR str[50];
NTSTATUS Status;
BOOLEAN SetupBoot;
PCHAR p1, p2;
ULONG MaxMem;
/*
* Fail at runtime if someone has changed various structures without
@ -343,12 +345,41 @@ ExpInitializeExecutive(VOID)
KeLowerIrql(DISPATCH_LEVEL);
NtEarlyInitVdm();
p1 = (PCHAR)KeLoaderBlock.CommandLine;
MaxMem = 0;
while(*p1 && (p2 = strchr(p1, '/')))
{
p2++;
if (!_strnicmp(p2, "MAXMEM", 6))
{
p2 += 6;
while (isspace(*p2)) p2++;
if (*p2 == '=')
{
p2++;
while(isspace(*p2)) p2++;
if (isdigit(*p2))
{
while (isdigit(*p2))
{
MaxMem = MaxMem * 10 + *p2 - '0';
p2++;
}
break;
}
}
}
p1 = p2;
}
MmInit1(FirstKrnlPhysAddr,
LastKrnlPhysAddr,
LastKernelAddress,
(PADDRESS_RANGE)&KeMemoryMap,
KeMemoryMapRangeCount);
KeMemoryMapRangeCount,
MaxMem > 8 ? MaxMem : 4096);
/* Import ANSI code page table */
for (i = 1; i < KeLoaderBlock.ModsCount; i++)

13
reactos/ntoskrnl/mm/mminit.c
View file

@ -1,4 +1,4 @@
/* $Id: mminit.c,v 1.46 2003/05/17 19:16:03 ekohl Exp $
/* $Id: mminit.c,v 1.47 2003/06/14 17:46:24 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top directory
* PROJECT: ReactOS kernel
@ -209,7 +209,8 @@ VOID MmInit1(ULONG FirstKrnlPhysAddr,
ULONG LastKrnlPhysAddr,
ULONG LastKernelAddress,
PADDRESS_RANGE BIOSMemoryMap,
ULONG AddressRangeCount)
ULONG AddressRangeCount,
ULONG MaxMem)
/*
* FUNCTION: Initalize memory managment
*/
@ -225,7 +226,6 @@ VOID MmInit1(ULONG FirstKrnlPhysAddr,
LastKrnlPhysAddr,
LastKernelAddress);
MmInitGlobalKernelPageDirectory();
if ((BIOSMemoryMap != NULL) && (AddressRangeCount > 0))
{
@ -245,6 +245,11 @@ VOID MmInit1(ULONG FirstKrnlPhysAddr,
}
}
if (KeLoaderBlock.MemHigher >= (MaxMem - 1) * 1024)
{
KeLoaderBlock.MemHigher = (MaxMem - 1) * 1024;
}
/*
* FIXME: Set this based on the system command line
*/
@ -252,6 +257,8 @@ VOID MmInit1(ULONG FirstKrnlPhysAddr,
MmUserProbeAddress = (PVOID)0x7fff0000;
MmHighestUserAddress = (PVOID)0x7ffeffff;
MmInitGlobalKernelPageDirectory();
/*
* Initialize memory managment statistics
*/