Subversion Repositories Kolibri OS

Rev

Rev 1090 | Rev 1130 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1090 Rev 1103
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: 1090 $
 8 
$Revision: 1103 $
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
- 
 
 14 
 
- 
 
 15 
align 4
Line 13... Line 16...
13 
MEM_UC     equ 0               ;uncached memory
 16 
proc mem_test
14 
 
 17 
; if we have BIOS with fn E820, skip the test
15 
align 4
 18 
           cmp dword [BOOT_VAR-OS_BASE + 0x9100], 0
16 
proc mem_test
 19 
           jnz .ret
Line 27... Line 30...
27 
           add edi, 0x100000
 30 
           add edi, 0x100000
28 
           xchg ebx, dword [edi]
 31 
           xchg ebx, dword [edi]
29 
           cmp dword [edi], 'TEST'
 32 
           cmp dword [edi], 'TEST'
30 
           xchg ebx, dword [edi]
 33 
           xchg ebx, dword [edi]
31 
           je @b
 34 
           je @b
32 
           mov [MEM_AMOUNT-OS_BASE], edi
 - 
 
Line 33... Line 35...
33 
 
 35 
 
34 
           and eax, not (CR0_CD+CR0_NW)  ;enable caching
 36 
           and eax, not (CR0_CD+CR0_NW)  ;enable caching
- 
 
 37 
           mov cr0, eax
35 
           mov cr0, eax
 38 
           inc dword [BOOT_VAR-OS_BASE + 0x9100]
- 
 
 39 
           xor eax, eax
- 
 
 40 
           mov [BOOT_VAR-OS_BASE + 0x9104], eax
- 
 
 41 
           mov [BOOT_VAR-OS_BASE + 0x9108], eax
- 
 
 42 
           mov [BOOT_VAR-OS_BASE + 0x910C], edi
- 
 
 43 
           mov [BOOT_VAR-OS_BASE + 0x9110], eax
36 
           mov eax, edi
 44 
.ret:
37 
           ret
 45 
           ret
Line 38... Line 46...
38 
endp
 46 
endp
39 
 
 47 
 
- 
 
 48 
align 4
- 
 
 49 
proc init_mem
- 
 
 50 
; calculate maximum allocatable address and number of allocatable pages
- 
 
 51 
           mov edi, BOOT_VAR-OS_BASE + 0x9104
- 
 
 52 
           mov ecx, [edi-4]
- 
 
 53 
           xor esi, esi ; esi will hold total amount of memory
- 
 
 54 
           xor edx, edx ; edx will hold maximum allocatable address
- 
 
 55 
.calcmax:
- 
 
 56 
; round all to pages
- 
 
 57 
           mov eax, [edi]
- 
 
 58 
           test eax, 0xFFF
- 
 
 59 
           jz @f
- 
 
 60 
           neg eax
- 
 
 61 
           and eax, 0xFFF
- 
 
 62 
           add [edi], eax
- 
 
 63 
           adc dword [edi+4], 0
- 
 
 64 
           sub [edi+8], eax
- 
 
 65 
           sbb dword [edi+12], 0
- 
 
 66 
           jc .unusable
- 
 
 67 
@@:
- 
 
 68 
           and dword [edi+8], not 0xFFF
- 
 
 69 
           jz .unusable
- 
 
 70 
; ignore memory after 4 Gb
- 
 
 71 
           cmp dword [edi+4], 0
- 
 
 72 
           jnz .unusable
- 
 
 73 
           mov eax, [edi]
- 
 
 74 
           cmp dword [edi+12], 0
- 
 
 75 
           jnz .overflow
- 
 
 76 
           add eax, [edi+8]
- 
 
 77 
           jnc @f
- 
 
 78 
.overflow:
- 
 
 79 
           mov eax, 0xFFFFF000
- 
 
 80 
@@:
- 
 
 81 
           cmp edx, eax
- 
 
 82 
           jae @f
- 
 
 83 
           mov edx, eax
- 
 
 84 
@@:
- 
 
 85 
           sub eax, [edi]
- 
 
 86 
           mov [edi+8], eax
- 
 
 87 
           add esi, eax
- 
 
 88 
           jmp .usable
- 
 
 89 
.unusable:
- 
 
 90 
           and dword [edi+8], 0
- 
 
 91 
.usable:
- 
 
 92 
           add edi, 20
40 
align 4
 93 
           loop .calcmax
41 
proc init_mem
 94 
.calculated:
- 
 
 95 
           mov [MEM_AMOUNT-OS_BASE], esi
- 
 
 96 
           mov [pg_data.mem_amount-OS_BASE], esi
42 
           mov eax, [MEM_AMOUNT-OS_BASE]
 97 
           shr esi, 12
43 
           mov [pg_data.mem_amount-OS_BASE], eax
 98 
           mov [pg_data.pages_count-OS_BASE], esi
- 
 
 99 
 
44 
 
 100 
           shr edx, 12
45 
           shr eax, 12
 101 
           add edx, 31
46 
           mov [pg_data.pages_count-OS_BASE], eax
 102 
           and edx, not 31
47 
           shr eax, 3
 103 
           shr edx, 3
48 
           mov [pg_data.pagemap_size-OS_BASE], eax
 104 
           mov [pg_data.pagemap_size-OS_BASE], edx
49 
 
 105 
 
50 
           add eax, (sys_pgmap-OS_BASE)+4095
 106 
           add edx, (sys_pgmap-OS_BASE)+4095
Line 51... Line 107...
51 
           and eax, not 4095
 107 
           and edx, not 4095
52 
           mov [tmp_page_tabs], eax
 108 
           mov [tmp_page_tabs], edx
53 
 
 109 
 
54 
           mov edx, (((sys_pgmap-OS_BASE) + 0xFFFFFF) and not 0xFFFFFF) shr 12
 110 
           mov edx, (((sys_pgmap-OS_BASE) + 0xFFFFFF) and not 0xFFFFFF) shr 12
Line 119... Line 175...
119 
           ret
 175 
           ret
120 
endp
 176 
endp
Line 121... Line 177...
121 
 
 177 
 
122 
align 4
 178 
align 4
123 
proc init_page_map
 - 
 
- 
 
 179 
proc init_page_map
124 
 
 180 
; mark all memory as unavailable
125 
           mov edi, sys_pgmap-OS_BASE
 181 
           mov edi, sys_pgmap-OS_BASE
126 
           mov ecx, [pg_data.pagemap_size-OS_BASE]
 182 
           mov ecx, [pg_data.pagemap_size-OS_BASE]
127 
           shr ecx, 2
 183 
           shr ecx, 2
128 
           or eax, -1
 184 
           xor eax, eax
129 
           cld
 185 
           cld
Line -... Line 186...
- 
 
 186 
           rep stosd
- 
 
 187 
 
- 
 
 188 
; scan through memory map and mark free areas as available
- 
 
 189 
           mov ebx, BOOT_VAR-OS_BASE + 0x9104
- 
 
 190 
           mov edx, [ebx-4]
- 
 
 191 
.scanmap:
- 
 
 192 
           mov ecx, [ebx+8]
- 
 
 193 
           shr ecx, 12 ; ecx = number of pages
- 
 
 194 
           jz .next
- 
 
 195 
           mov edi, [ebx]
- 
 
 196 
           shr edi, 12 ; edi = first page
- 
 
 197 
           mov eax, edi
- 
 
 198 
           neg eax
- 
 
 199 
           shr edi, 5
- 
 
 200 
           add edi, sys_pgmap-OS_BASE
- 
 
 201 
           and eax, 31
- 
 
 202 
           jz .startok
- 
 
 203 
           sub ecx, eax
- 
 
 204 
           jbe .onedword
- 
 
 205 
           push ecx
- 
 
 206 
           mov ecx, eax
- 
 
 207 
           xor eax, eax
- 
 
 208 
           inc eax
- 
 
 209 
           shl eax, cl
- 
 
 210 
           dec eax
- 
 
 211 
           or [edi], eax
- 
 
 212 
           add edi, 4
- 
 
 213 
           pop ecx
- 
 
 214 
.startok:
- 
 
 215 
           push ecx
- 
 
 216 
           shr ecx, 5
- 
 
 217 
           or eax, -1
- 
 
 218 
           rep stosd
- 
 
 219 
           pop ecx
- 
 
 220 
           and ecx, 31
- 
 
 221 
           not eax
- 
 
 222 
           shl eax, cl
- 
 
 223 
           or [edi], eax
- 
 
 224 
           jmp .next
- 
 
 225 
.onedword:
- 
 
 226 
           add ecx, eax
- 
 
 227 
@@:
- 
 
 228 
           dec eax
- 
 
 229 
           bts [edi], eax
- 
 
 230 
           loop @b
- 
 
 231 
.next:
- 
 
 232 
           add ebx, 20
- 
 
 233 
           dec edx
- 
 
 234 
           jnz .scanmap
130 
           rep stosd
 235 
 
131 
 
 236 
; mark kernel memory as allocated (unavailable)
132 
           mov ecx, [tmp_page_tabs]
 237 
           mov ecx, [tmp_page_tabs]
133 
           mov edx, [pg_data.pages_count-OS_BASE]
 238 
           mov edx, [pg_data.pages_count-OS_BASE]
134 
           shr ecx, 12
 239 
           shr ecx, 12
Line 144... Line 249...
144 
 
 249 
 
145 
           not eax
 250 
           not eax
146 
           mov ecx, ebx
 251 
           mov ecx, ebx
147 
           and ecx, 31
 252 
           and ecx, 31
148 
           shl eax, cl
 253 
           shl eax, cl
149 
           mov [edi], eax
 254 
           and [edi], eax
150 
           add edi, OS_BASE
 255 
           add edi, OS_BASE
Line 151... Line 256...
151 
           mov [page_start-OS_BASE], edi;
 256 
           mov [page_start-OS_BASE], edi;
152 
 
 257