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- Protect the region for the kernel mapped low memory with a memory area.

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- Unmap the mapped low memory above 1mb (0xd0100000-0xd03fffff).

svn path=/trunk/; revision=6822
This commit is contained in:
Hartmut Birr 2003-11-30 17:17:02 +00:00
parent 949a4954aa
commit 8f5fca485e
1 changed files with 24 additions and 4 deletions
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28
reactos/ntoskrnl/mm/mminit.c
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@ -1,4 +1,4 @@
/* $Id: mminit.c,v 1.56 2003/11/16 15:19:28 hbirr Exp $
/* $Id: mminit.c,v 1.57 2003/11/30 17:17:02 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top directory
* PROJECT: ReactOS kernel
@ -52,6 +52,7 @@ static MEMORY_AREA* kernel_data_desc = NULL;
static MEMORY_AREA* kernel_param_desc = NULL;
static MEMORY_AREA* kernel_pool_desc = NULL;
static MEMORY_AREA* kernel_shared_data_desc = NULL;
static MEMORY_AREA* kernel_mapped_low_mem_desc = NULL;
static MEMORY_AREA* MiKernelMapDescriptor = NULL;
static MEMORY_AREA* MiPagedPoolDescriptor = NULL;
@ -144,6 +145,18 @@ MmInitVirtualMemory(ULONG LastKernelAddress,
&kernel_kpcr_desc,
FALSE,
FALSE);
BaseAddress = (PVOID)0xd0000000;
MmCreateMemoryArea(NULL,
MmGetKernelAddressSpace(),
MEMORY_AREA_SYSTEM,
&BaseAddress,
0x100000,
0,
&kernel_mapped_low_mem_desc,
FALSE,
FALSE);
BaseAddress = (PVOID)KERNEL_BASE;
Length = PAGE_ROUND_UP(((ULONG)&_text_end__)) - KERNEL_BASE;
ParamLength = ParamLength - Length;
@ -305,7 +318,7 @@ MmInit1(ULONG FirstKrnlPhysAddr,
if ((BIOSMemoryMap != NULL) && (AddressRangeCount > 0))
{
// If we have a bios memory map, recalulate the the memory size
// If we have a bios memory map, recalulate the memory size
ULONG last = 0;
for (i = 0; i < AddressRangeCount; i++)
{
@ -413,12 +426,19 @@ MmInit1(ULONG FirstKrnlPhysAddr,
}
DPRINT("Invalidating between %x and %x\n",
LastKernelAddress,
0xc0600000);
LastKernelAddress, 0xc0600000);
for (i=(LastKernelAddress); i<0xc0600000; i+=PAGE_SIZE)
{
MmRawDeleteVirtualMapping((PVOID)(i));
}
DPRINT("Invalidating between %x and %x\n",
0xd0100000, 0xd0400000);
for (i=0xd0100000; i<0xd0400000; i+=PAGE_SIZE)
{
MmRawDeleteVirtualMapping((PVOID)(i));
}
DPRINT("Almost done MmInit()\n");
#ifndef MP
/* FIXME: This is broken in SMP mode */