[tkreuzer] 34733: - create 512 2 MB pages first, so we have a max of 1 GB available memory. This gets us much further through hardware detection. the setup screen loads and then it stops with "failed to load the ANSI codepage file"

Author: tkreuzer
Date: Thu Jul 24 05:26:15 2008
New Revision: 34733
URL: http://svn.reactos.org/svn/reactos?rev=34733&view=rev
Log:
- create 512 2 MB pages first, so we have a max of 1 GB available memory. This gets us
much further through hardware detection. the setup screen loads and then it stops with
"failed to load the ANSI codepage file"
Modified:
    branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S
Modified: branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/boot/…
==============================================================================
--- branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S [iso-8859-1]
(original)
+++ branches/ros-amd64-bringup/reactos/boot/freeldr/freeldr/arch/amd64/arch.S [iso-8859-1]
Thu Jul 24 05:26:15 2008
@@ -92,8 +92,8 @@
 /*
- * We defines one 2MB page at the start of memory, so we can access the first
- * 2MBs as if paging was disabled
+ * We define 512 2MB pages at the start of memory, so we can access the first
+ * 1 GB as if paging was disabled
  */
 #define PML4_PAGENUM 60 // Put it high enough so it doesn't interfere with freeldr
@@ -115,29 +115,33 @@
        xor di, di
        /* One entry in the PML4 pointing to PDP */
-       mov ax, ((PDP_PAGENUM << 12) & 0xffff) | 0x00f
-       stosw
-       mov ax, (PDP_PAGENUM >> 4)
-       stosw
+       mov eax, (PDP_PAGENUM << 12) | 0x00f
+       stosd
        xor ax,ax
        mov cx, 0x07fe
        rep stosw
        /* One entry in the PDP pointing to PD */
-       mov ax, ((PD_PAGENUM << 12) & 0xffff) | 0x00f
-       stosw
-       mov ax, (PD_PAGENUM >> 4)
-       stosw
-       xor ax,ax
-       mov cx, 0x07fe
-       rep stosw
-
-       /* One entry in the PD defining a 2MB page */
-       mov ax, 0x018f
-       stosw
-       xor ax,ax
-       mov cx,0x07ff
-       rep stosw
+       mov eax, (PD_PAGENUM << 12) | 0x00f
+       stosd
+
+       xor eax, eax
+       mov ecx, 0x03ff
+       rep stosd
+
+       /* 512 entries in the PD defining a 2MB page each */
+       mov ecx, 512
+       mov eax, 0x008f
+
+Bpt2:
+       mov es: [di], eax
+       mov dword ptr es: [di + 4], 0
+       add eax, 512 << 12 // add 512 4k pages
+       add di, 8
+
+       /* Loop it */
+       dec cx
+       jnz Bpt2
        /* Return */
        pop es
@@ -258,6 +262,7 @@
        ret
+
 /** Some data *****************************************************************/
 .code64