- Map only the vga frame buffer for the hal to write debug messages

and map it higher up in the kernel address space so more space is available
for the nonpaged and paged pools.

svn path=/trunk/; revision=8769

reactos/hal/halx86/display.c

@@ -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: display.c,v 1.13 2004/01/18 22:35:26 gdalsnes Exp $
+/* $Id: display.c,v 1.14 2004/03/16 22:45:55 dwelch Exp $
  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS kernel
@@ -577,9 +577,8 @@ HalInitializeDisplay (PLOADER_PARAMETER_BLOCK LoaderBlock)
       ULONG ScanLines;
       ULONG Data;
 
-      VideoBuffer = (WORD *)(0xd0000000 + 0xb8000);
+      VideoBuffer = (WORD *)(0xff3b8000);
-      GraphVideoBuffer = (PUCHAR)(0xd0000000 + 0xa0000);
+      GraphVideoBuffer = (PUCHAR)(0xff3a0000);
-//      VideoBuffer = HalMapPhysicalMemory (0xb8000, 2);
 
       /* Set cursor position */
 //      CursorX = LoaderBlock->cursorx;

reactos/ntoskrnl/kd/mda.c

@@ -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: mda.c,v 1.3 2002/09/08 10:23:27 chorns Exp $
+/* $Id: mda.c,v 1.4 2004/03/16 22:45:56 dwelch Exp $
  *
  * PROJECT:         ReactOS kernel
  * FILE:            ntoskrnl/kd/mda.c
@@ -77,7 +77,7 @@ KdInitializeMda(VOID)
   MdaStatusPort = 0x3ba;
   MdaGfxPort = 0x3bf;
 
-  VideoBuffer = (PUSHORT)(0xd0000000 + 0xb0000);
+  VideoBuffer = (PUSHORT)(0xff3b0000);
 
   MdaCursorX = MdaCursorY = 0;
 }

reactos/ntoskrnl/ke/i386/multiboot.S

@@ -139,7 +139,6 @@ _multiboot_entry:
 	movl	$(V2P(kernel_pagetable+30*4096) + 0x7), 0xC78(%esi)
 	movl	$(V2P(kernel_pagetable+31*4096) + 0x7), 0xC7c(%esi)
 
-	movl	$(V2P(lowmem_pagetable) + 0x7), 0xD00(%esi)
 	movl	$(V2P(startup_pagedirectory) + 0x7), 0xF00(%esi) 
 #ifdef MP
 	movl	$(V2P(apic_pagetable) + 0x7), 0xFEC(%esi)
@@ -200,6 +199,18 @@ _multiboot_entry:
 	movl	$0x1007, %eax
 	movl	%eax, (%esi, %edi)
 
+	/*
+	 * Initialize a part of the same pagetable to map the vga frame buffer.
+	 */
+	movl	$0xa0007, %eax
+	movl	$0x20, %ecx
+	movl	$0xE80, %edi
+.l9:	
+	movl	%eax, (%esi, %edi)
+	add	$4, %edi
+	add	$0x1000, %eax
+	loop	.l9
+
 #ifdef MP
 
 .m1:

reactos/ntoskrnl/mm/mminit.c

@@ -1,4 +1,4 @@
-/* $Id: mminit.c,v 1.61 2004/03/16 21:13:15 dwelch Exp $
+/* $Id: mminit.c,v 1.62 2004/03/16 22:45:56 dwelch Exp $
  *
  * COPYRIGHT:   See COPYING in the top directory
  * PROJECT:     ReactOS kernel 
@@ -48,7 +48,7 @@ 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* kernel_mapped_vga_framebuffer_desc = NULL; 
 static MEMORY_AREA* MiKernelMapDescriptor = NULL;
 static MEMORY_AREA* MiPagedPoolDescriptor = NULL;
 
@@ -146,14 +146,14 @@ MmInitVirtualMemory(ULONG LastKernelAddress,
 		      FALSE,
 		      BoundaryAddressMultiple);
 
-   BaseAddress = (PVOID)0xd0000000;
+   BaseAddress = (PVOID)0xFF3A0000;
    MmCreateMemoryArea(NULL,
 		      MmGetKernelAddressSpace(),
 		      MEMORY_AREA_SYSTEM,
 		      &BaseAddress,
-		      0x100000,
+		      0x20000,
 		      0,
-		      &kernel_mapped_low_mem_desc,
+		      &kernel_mapped_vga_framebuffer_desc,
 		      FALSE,
 		      FALSE,
 		      BoundaryAddressMultiple);