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keep physical page 0 intact (used by some BIOSes in int 13h)

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git-svn-id: svn://kolibrios.org@1172 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Evgeny Grechnikov (Diamond) 2009-09-22 17:10:24 +00:00
parent bb5ed21ec9
commit 26d83dcf4a
3 changed files with 8 additions and 7 deletions
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4
kernel/trunk/const.inc
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@ -186,7 +186,7 @@ TSS_SIZE equ (128+8192)
OS_BASE equ 0x80000000
window_data equ OS_BASE
window_data equ (OS_BASE+0x0001000)
CURRENT_TASK equ (OS_BASE+0x0003000)
TASK_COUNT equ (OS_BASE+0x0003004)
@ -331,7 +331,7 @@ LFB_BASE equ 0xFE000000
new_app_base equ 0;
twdw equ 0x3000 ;(CURRENT_TASK-window_data)
twdw equ 0x2000 ;(CURRENT_TASK-window_data)
std_application_base_address equ new_app_base
RING0_STACK_SIZE equ (0x2000 - 512) ;512 áàéò äëÿ êîíòåêñòà FPU

4
kernel/trunk/kernel.asm
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@ -238,8 +238,8 @@ B32:
mov edi,0x2F0000
mov ecx,0x10000 / 4
rep movsd
xor edi, edi
mov ecx,0x10000 / 4
mov edi,0x1000
mov ecx,0xf000 / 4
rep stosd
call test_cpu

7
kernel/trunk/memmap.inc
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@ -30,7 +30,10 @@
;
; 0x00000000 -> 0x7FFFFFFF application 2Gb
; 0x80000000 -> 1FFF window_data - 256 entries
; 0x80000000 -> 0FFF physical page zero - do not write
; (used by int 13h in some configurations)
;
; 0x80001000 -> 2FFF window_data - 256 entries
;
; 0000 dword x start
; 0004 dword y start
@ -41,8 +44,6 @@
; 0018 dword color of frames
; 001C dword window flags, +30 = window drawn, +31 redraw flag
;
; 2000 -> 2FFF free
;
; 3000 -> 4FFF task list - 256 entries
;
; 00 dword process count