Subversion Repositories Kolibri OS

Rev

Rev 1941 | Rev 2047 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1941 Rev 1952
Line 3... Line 3...
3 
;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
 3 
;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
4 
;; Distributed under terms of the GNU General Public License    ;;
 4 
;; Distributed under terms of the GNU General Public License    ;;
5 
;;                                                              ;;
 5 
;;                                                              ;;
6 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 6 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Line 7... Line 7...
7 
 
 7 
 
Line 8... Line 8...
8 
$Revision: 1941 $
 8 
$Revision: 1952 $
9 
 
 9 
 
10 
 
 10 
 
Line 11... Line 11...
11 
MEM_WB	   equ 6	       ;write-back memory
 11 
MEM_WB	   equ 6	       ;write-back memory
12 
MEM_WC	   equ 1	       ;write combined memory
 12 
MEM_WC	   equ 1	       ;write combined memory
13 
MEM_UC	   equ 0	       ;uncached memory
 13 
MEM_UC	   equ 0	       ;uncached memory
Line 14... Line 14...
14 
 
 14 
 
15 
; ======================================================================
 15 
; ======================================================================
16 
align 4
 16 
align 4
17 
preinit_mem:
 17 
preinit_mem:
18 
 
 18 
 
19 
; clear [0x280000..HEAP_BASE]
 19 
; clear [CLEAN_ZONE..HEAP_BASE]
Line 20... Line 20...
20 
	   xor	 eax,eax
 20 
	   xor	 eax,eax
Line 33... Line 33...
33 
	   mov	 ecx, (uglobals_size/4)+4
 33 
	   mov	 ecx, (uglobals_size/4)+4
34 
	   rep	 stosd
 34 
	   rep	 stosd
Line 35... Line 35...
35 
 
 35 
 
36 
; save [0..0xffff]
 36 
; save [0..0xffff]
37 
	   xor	 esi, esi
 37 
	   xor	 esi, esi
38 
	   mov	 edi,(BOOT_VAR-OS_BASE) 		; low mem storage area
 38 
	   mov	 edi, (BOOT_VAR	- OS_BASE)		; low mem storage area
39 
	   mov	 ecx, 0x10000 / 4
 39 
	   mov	 ecx, 0x10000 / 4
40 
	   rep	 movsd
 40 
	   rep	 movsd
41 
; clear [0x1000..0x0ffff]
 41 
; clear [0x1000..0x0ffff]
42 
	   mov	 edi,0x1000
 42 
	   mov	 edi,0x1000
Line 81... Line 81...
81 
	   mov ebx, cr4
 81 
	   mov ebx, cr4
82 
	   or  ebx, CR4_PSE
 82 
	   or  ebx, CR4_PSE
83 
	   mov eax, PG_LARGE+PG_SW
 83 
	   mov eax, PG_LARGE+PG_SW
84 
	   mov cr4, ebx
 84 
	   mov cr4, ebx
85 
	   dec [pg_data.kernel_tables-OS_BASE]
 85 
	   dec [pg_data.kernel_tables-OS_BASE]
86 
	   sub [pg_data.kernel_pages -OS_BASE], 1024	; 1 large page = 1024 ordinary pages
 - 
 
Line 87... Line 86...
87 
 
 86 
 
88 
	   mov [edx], eax				; map first (physical) 4M bytes
 87 
	   mov [edx], eax				; map first (physical) 4M bytes
Line 89... Line 88...
89 
	   add edx, 4
 88 
	   add edx, 4
90 
 
 89 
 
91 
	   mov edi, [tmp_page_tabs]
 - 
 
92 
	   mov ecx, [pg_data.kernel_pages -OS_BASE]	; map the rest of kernel space
 - 
 
93 
	   mov eax, 0x00400000+PG_SW
 - 
 
94 
.map_kernel_pages:
 90 
	   mov edi, [tmp_page_tabs]
95 
	   stosd
 91 
	   mov ecx, [pg_data.kernel_pages -OS_BASE]	; safety cleaning of already-zeroed space
96 
	   add	eax, 4096
 - 
 
Line 97... Line 92...
97 
	   dec	ecx
 92 
	   xor eax, eax
98 
	   jnz	.map_kernel_pages
 93 
	   rep stosd
99 
 
 94 
 
100 
	   mov ecx, [pg_data.kernel_tables-OS_BASE]	; build some PDEs to hold empty PTEs
 95 
	   mov ecx, [pg_data.kernel_tables-OS_BASE]	; build some PDEs to hold empty PTEs
- 
 
 96 
	   mov eax, [tmp_page_tabs]
101 
	   mov eax, [tmp_page_tabs]
 97 
	   or  eax, PG_SW
102 
	   or  eax, PG_SW
 98 
	   mov edi, edx 		; edi = sys_pgdir+0x804
103 
	   mov edi, edx 		; edi = sys_pgdir+0x804
 99 
 
104 
.map_kernel_tabs:
 100 
.map_kernel_tabs:
105 
	   stosd
 101 
	   stosd