www.pudn.com > czxtsycx1.zip > TOS_USEP.ASM
GINT0EH PROC FAR
pop eax ;important error code
PUSH EAX
PUSH FS
PUSH DI
MOV AX,G_PT0_SEL ; ；初始化页表0
MOV FS,AX
;PAGE 2 IN PAGE TABLE 1: invalid
MOV EAX,402000H ;8K FROM 4M BEGIN
OR EAX,3 ; ；设置页表0的其它所有表项为为用户页
MOV DI,1008H
MOV DWORD PTR FS:[DI],EAX
GINT0EH_END:
POP DI
POP FS
POP EAX
IRETD ;iret-->error
GINT0EH ENDP
;***********PAGE
V_SEL_SETUP PROC FAR
;setup v_tos_data_sel
XOR EDX,EDX
MOV EBX,0C0423000H ;TOS_CODE VIRTUAL BASE ADDR
mov dx,TOS_CODELEN
and dx,0FFFH
cmp dx,0
JE V_SEL1
ADD EBX,1000H
V_SEL1:
mov dx,TOS_CODELEN
and dx,0F000H
ADD EBX,EDX ;EBX=TOS_STACK VIRTUAL BASE ADDR
MOV AX,GDT_ASDATA_SEL ;SETUP V_TOS_STACK_SEL
MOV DS,AX
MOV ECX,EBX
MOV DS:V_TOS_STACK.BASE_L,CX
SHR ECX,16
MOV DS:V_TOS_STACK.BASE_M,CL
MOV DS:V_TOS_STACK.BASE_H,CH
mov dx,TOS_STACKLEN
and dx,0FFFH
cmp dx,0
JE V_SEL2
ADD EBX,1000H
V_SEL2:
mov dx,TOS_STACKLEN
and dx,0F000H
ADD EBX,EDX ;EBX=TOS_DATA ADDR
MOV AX,GDT_ASDATA_SEL ;SETUP V_TOS_DATA_SEL
MOV DS,AX
MOV ECX,EBX
MOV DS:V_TOS_DATA.BASE_L,CX
SHR ECX,16
MOV DS:V_TOS_DATA.BASE_M,CL
MOV DS:V_TOS_DATA.BASE_H,CH
;
mov dx,DATA_TOSLEN
and dx,0FFFH
cmp dx,0
JE V_SEL3
ADD EBX,1000H
V_SEL3:
mov dx,DATA_TOSLEN
and dx,0F000H
ADD EBX,EDX ;EBX=USER_PSTSSSEG ADDR
MOV AX,GDT_ASDATA_SEL ;SETUP V_USER_PSTSS_SEL
MOV DS,AX
MOV ECX,EBX
MOV DS:V_USER_PSTSS.BASE_L,CX
SHR ECX,16
MOV DS:V_USER_PSTSS.BASE_M,CL
MOV DS:V_USER_PSTSS.BASE_H,CH
MOV ECX,EBX ;SETUP USER_PSTSS_D
MOV DS:USER_PSTSS_D.BASE_L,CX
SHR ECX,16
MOV DS:USER_PSTSS_D.BASE_M,CL
MOV DS:USER_PSTSS_D.BASE_H,CH
ADD EBX,1000H ;EBX=USER_PSLDTSEG
MOV AX,GDT_ASDATA_SEL ;SETUP V_USER_PSLDT_SEL
MOV DS,AX
MOV ECX,EBX
MOV DS:V_USER_PSLDTT.BASE_L,CX
SHR ECX,16
MOV DS:V_USER_PSLDTT.BASE_M,CL
MOV DS:V_USER_PSLDTT.BASE_H,CH
;MOV AX,USER_PSLDT_MOV_SEL ;SETUP USER_PSLDT_SEL IN LDT
;MOV DS,AX
;MOV ECX,EBX
;MOV DS:USER_PSLDT_MOV.BASE_L,CX
;SHR ECX,16
;MOV DS:USER_PSLDT_MOV.BASE_M,CL
;MOV DS:USER_PSLDT_MOV.BASE_H,CH
MOV ECX,EBX ;SETUP USER_PSLDT_ASDATA_SEL
MOV DS:USER_PSLDTT_ASDATA.BASE_L,CX
SHR ECX,16
MOV DS:USER_PSLDTT_ASDATA.BASE_M,CL
MOV DS:USER_PSLDTT_ASDATA.BASE_H,CH
;
MOV AX,TOS_DATA_SEL
MOV DS,AX
RET
V_SEL_SETUP ENDP
SEGS_MOV_2M PROC FAR ;mov to 2M
;mov tos segs--->2M use ds,es
XOR ESI,ESI
XOR EDI,EDI
G_MOV IDT_SEL,G_MOV_SEL,0,0,IDTLEN ; 4K
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:IDT_M.PH_ADDR,200000H ;IDT: 2M
MOV DS:IDT_M.LO_ADDR,0C0400000H ;IDT: 3G+4M
G_MOV TOS_TSSASDATA_SEL,G_MOV_SEL,0,1000H,TOS_TSSLEN ;4K
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:TOS_TSS_M.PH_ADDR,201000H ;TOS_TSS:2M+4k
MOV DS:TOS_TSS_M.LO_ADDR,0C0401000H
G_MOV GDT_ASDATA_SEL,G_MOV_SEL,0,2000H,GDTSEGLEN ;16*4K
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:GDT_M.PH_ADDR,202000H ;
MOV DS:GDT_M.LO_ADDR,0C0402000H ;
MOV DS:GPDT_M.PH_ADDR,212000H ;4K
MOV DS:GPDT_M.LO_ADDR,0C0412000H ;4K
MOV DS:GPT0_M.PH_ADDR,213000H ;4K*16 16PAGES
MOV DS:GPT0_M.LO_ADDR,0C0413000H ;4K*16 16PAGES
G_MOV TOS_CODE_SEL,G_MOV_SEL,0,23000H,TOS_CODELEN
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:TOS_CODE_M.PH_ADDR,223000H ;
MOV DS:TOS_CODE_M.LO_ADDR,0C0423000H ;
XOR EDX,EDX
MOV EBX,0
mov dx,TOS_CODELEN
and dx,0FFFH
cmp dx,0
JE g_mov_1
ADD EBX,1000H
g_mov_1:
mov dx,TOS_CODELEN
and dx,0F000H
ADD EBX,EDX
ADD EBX,23000H ;EBX PHISICAL OFFSET
G_MOV TOS_STACK_SEL,G_MOV_SEL,0,EBX,TOS_STACKLEN
ADD EBX,200000H
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:TOS_STACK_M.PH_ADDR,EBX ;GDT:2M+18*4k+EDX
ADD EBX,0C0200000H
MOV DS:TOS_STACK_M.LO_ADDR,EBX ;GDT:2M+18*4k+EDX
SUB EBX,0C0400000H
;
XOR EDX,EDX
mov dx,TOS_STACKLEN
and dx,0FFFH
cmp dx,0
JE g_mov_2
ADD EBX,1000H
g_mov_2:
mov dx,TOS_STACKLEN
and dx,0F000H
ADD EBX,EDX
G_MOV TOS_DATA_SEL,G_MOV_SEL,0,EBX,DATA_TOSLEN
ADD EBX,200000H
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:DATA_TOS_M.PH_ADDR,EBX ;GDT:2M+18*4k+EDX
ADD EBX,0C0200000H
MOV DS:DATA_TOS_M.LO_ADDR,EBX ;GDT:2M+18*4k+EDX
SUB EBX,0C0400000H
;
XOR EDX,EDX
mov dx,DATA_TOSLEN
and dx,0FFFH
cmp dx,0
JE g_mov_3
add EBX,1000H
g_mov_3:
mov dx,DATA_TOSLEN
and dx,0F000H
ADD EBX,EDX
G_MOV USER_PSTSS_MOV_SEL,G_MOV_SEL,0,EBX,USER_PSTSSLEN
ADD EBX,200000H
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:USER_PSTSS_M.PH_ADDR,EBX ;GDT:2M+18*4k+EDX
ADD EBX,0C0200000H
MOV DS:USER_PSTSS_M.LO_ADDR,EBX ;GDT:2M+18*4k+EDX
SUB EBX,0C0400000H
;
ADD EBX,01000H
G_MOV USER_PSLDT_MOV_SEL,G_MOV_SEL,0,EBX,USER_PSLDTLEN
ADD EBX,200000H
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV DS:USER_PSLDT_M.PH_ADDR,EBX ;GDT:2M+18*4k+EDX
ADD EBX,0C0200000H
MOV DS:USER_PSLDT_M.LO_ADDR,EBX ;GDT:2M+18*4k+EDX
SEGS_MOV_2M0:
MOV AX,TOS_DATA_SEL
MOV DS,AX
MOV AX,G_VRAM_SEL
MOV ES,AX
RET
SEGS_MOV_2M ENDP
;///////////
PGT_INIT PROC FAR
; USE ES
; page DICTIONRY
MOV AX,G_PDT_SEL ; ；初始化页目录表
MOV ES,AX
XOR DI,DI
MOV CX,1024 ; ；把其它所有项清空，置无效
XOR EAX,EAX
REP STOSD
MOV EAX,G_PT0_ADDR OR 3
MOV DWORD PTR ES:[0],EAX ;0PAGE FOR TOS_CODE
ADD EAX,1000H
MOV DWORD PTR ES:[4],EAX ;1PAGE FOR G_BUF
ADD EAX,1000H
MOV DWORD PTR ES:[3072],EAX ;768PAGE(3G) FOR VRAM
ADD EAX,1000H
MOV DWORD PTR ES:[3076],EAX ;769PAGE FOR TOS SYSTEM
; ；设置页目录表中页表0的表项为用户页
;；（U/S=0），可读写页（R/W=1），和页有效（PL=1）
;PAGE0 AND PAGE1
MOV AX,G_PT0_SEL ; ；初始化页表0
MOV ES,AX
XOR DI,DI
MOV CX,2048
XOR EAX,EAX
OR EAX,3 ; ；设置页表0的其它所有表项为为用户页
;；（U/S=0），可读写页（R/W=1），和页有效（PL=1）
PGT_INIT0:
STOSD
ADD EAX,1000H ;PH_ADDR=LO_ADDR
LOOP PGT_INIT0
MOV CX,1024
MOV EAX,0B8000H ;PAGE768
OR EAX,3 ; ；设置页表0的其它所有表项为为用户页
PGT_INIT768: ;3G
STOSD
ADD EAX,1000H
LOOP PGT_INIT768
MOV ECX,DS:USER_PSLDT_M.PH_ADDR
SUB ECX,200000H
SHR ECX,12
ADD CX,16
MOV EAX,200000H ;PAGE769 2M
OR EAX,3 ; ；设置页表0的其它所有表项为为用户页
PGT_INIT769:
STOSD
ADD EAX,1000H
LOOP PGT_INIT769
;PAGE 2 IN PAGE TABLE 1: invalid
MOV EAX,402000H ;8K FROM 4M BEGIN
OR EAX,2 ; ；设置页表0的其它所有表项为为用户页
MOV DI,1008H
STOSD
PGT_INIT_END:
MOV AX,G_VRAM_SEL
MOV ES,AX
RET
PGT_INIT ENDP