Subversion Repositories Kolibri OS

Rev

Rev 2047 | Rev 2425 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 2047 Rev 2350
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: 2047 $
 8 
$Revision: 2350 $
9 
 
 9 
 
10 
 
 10 
 
Line 76... Line 76...
76 
	   mov	eax, esi
 76 
	   mov	eax, esi
77 
	   mov	[MEM_AMOUNT-OS_BASE], eax
 77 
	   mov	[MEM_AMOUNT-OS_BASE], eax
78 
	   mov	[pg_data.mem_amount-OS_BASE], eax	; the true MEMTOP
 78 
	   mov	[pg_data.mem_amount-OS_BASE], eax	; the true MEMTOP
79 
	   mov	[UserDMAaddr-OS_BASE], eax
 79 
	   mov	[UserDMAaddr-OS_BASE], eax
Line 80... Line -...
80 
 
 - 
 
81 
	   mov edx, esi 				; edx will hold maximum allocatable address
 80 
 
82 
	   shr esi, 12
 81 
	   shr esi, 12
Line 83... Line -...
83 
	   mov [pg_data.pages_count-OS_BASE], esi	; max number of PTEs   ?
 - 
 
84 
 
 - 
 
85 
	   shr edx, 12
 82 
	   mov [pg_data.pages_count-OS_BASE], esi	; max number of PTEs   ?
86 
	   add edx, 31
 83 
 
87 
	   and edx, not 31
 84 
	   mov edx, esi 				; edx will hold maximum allocatable address
Line 88... Line 85...
88 
	   shr edx, 3
 85 
	   shr edx, 3
89 
	   mov [pg_data.pagemap_size-OS_BASE], edx	; size of sys_pgmap structure
 86 
	   mov [pg_data.pagemap_size-OS_BASE], edx	; size of sys_pgmap structure
90 
 
 87 
 
Line 91... Line 88...
91 
	   add edx, (sys_pgmap-OS_BASE)+4095
 88 
	   add edx, (sys_pgmap-OS_BASE)+4095
92 
	   and edx, not 4095
 89 
	   and edx, not 4095
93 
	   mov [tmp_page_tabs], edx			; free zone to build PTEs
 90 
	   mov [tmp_page_tabs], edx			; free zone to build PTEs for all available memory
94 
 
 91 
 
Line 95... Line 92...
95 
	   mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096
 92 
	   mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096
Line 96... Line 93...
96 
	   mov [pg_data.kernel_pages -OS_BASE], edx
 93 
	   mov [pg_data.kernel_pages -OS_BASE], edx
97 
	   shr edx, 10
 94 
	   shr edx, 10
Line 134... Line 131...
134 
	   ret
 131 
	   ret
135 
endp
 132 
endp
Line 136... Line 133...
136 
 
 133 
 
137 
align 4
 134 
align 4
138 
proc init_page_map
 135 
proc init_page_map
139 
; mark all memory as unavailable
 136 
; mark all memory as available
140 
	   mov edi, sys_pgmap-OS_BASE
 137 
	   mov edi, sys_pgmap-OS_BASE
141 
	   mov ecx, [pg_data.pagemap_size-OS_BASE]
 138 
	   mov ecx, [pg_data.pagemap_size-OS_BASE]
142 
	   shr ecx, 2
 139 
	   shr ecx, 2
143 
	   xor eax, eax
 140 
	   mov eax, -1
144 
	   cld
 141 
	   cld
Line 145... Line -...
145 
	   rep stosd
 - 
 
146 
 
 - 
 
147 
; scan through memory map and mark free areas as available
 - 
 
148 
	   mov ebx, BOOT_VAR-OS_BASE + 0x9104
 - 
 
149 
	   mov edx, [ebx-4]
 - 
 
150 
.scanmap:
 - 
 
151 
	   mov ecx, [ebx+8]
 - 
 
152 
	   shr ecx, 12 ; ecx = number of pages
 - 
 
153 
	   jz .next
 - 
 
154 
	   mov edi, [ebx]
 - 
 
155 
	   shr edi, 12 ; edi = first page
 - 
 
156 
	   mov eax, edi
 - 
 
157 
	   shr edi, 5
 - 
 
158 
	   shl edi, 2
 - 
 
159 
	   add edi, sys_pgmap-OS_BASE
 - 
 
160 
	   and eax, 31
 - 
 
161 
	   jz .startok
 - 
 
162 
	   add ecx, eax
 - 
 
163 
	   sub ecx, 32
 - 
 
164 
	   jbe .onedword
 - 
 
165 
	   push ecx
 - 
 
166 
	   mov ecx, eax
 - 
 
167 
	   or eax, -1
 - 
 
168 
	   shl eax, cl
 - 
 
169 
	   or [edi], eax
 - 
 
170 
	   add edi, 4
 - 
 
171 
	   pop ecx
 - 
 
172 
.startok:
 - 
 
173 
	   push ecx
 - 
 
174 
	   shr ecx, 5
 - 
 
175 
	   or eax, -1
 - 
 
176 
	   rep stosd
 - 
 
177 
	   pop ecx
 - 
 
178 
	   and ecx, 31
 - 
 
179 
	   neg eax
 - 
 
180 
	   shl eax, cl
 - 
 
181 
	   dec eax
 - 
 
182 
	   or [edi], eax
 - 
 
183 
	   jmp .next
 - 
 
184 
.onedword:
 - 
 
185 
	   add ecx, 32
 - 
 
186 
	   sub ecx, eax
 - 
 
187 
@@:
 - 
 
188 
	   bts [edi], eax
 - 
 
189 
	   inc eax
 - 
 
190 
	   loop @b
 - 
 
191 
.next:
 - 
 
192 
	   add ebx, 20
 - 
 
Line 193... Line 142...
193 
	   dec edx
 142 
	   rep stosd
194 
	   jnz .scanmap
 143 
 
195 
 
 144 
 
196 
; mark kernel memory as allocated (unavailable)
 145 
; mark kernel memory as allocated (unavailable)