275 lines
4.9 KiB
NASM
275 lines
4.9 KiB
NASM
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TITLE LDFASTB - FastBoot procedure
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.xlist
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include kernel.inc
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include newexe.inc
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include pdb.inc
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include tdb.inc
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include eems.inc
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.list
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if PMODE32
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.386
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endif
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externA __ahincr
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externFP GlobalReAlloc
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sBegin NRESCODE
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assumes CS,NRESCODE
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assumes DS,NOTHING
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assumes ES,NOTHING
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sEnd NRESCODE
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DataBegin
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externB Kernel_flags
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externW pGlobalHeap
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externW win_show
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externW hLoadBlock
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externW segLoadBlock
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externD lpBootApp
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ife ROM
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externW cpShrink
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externW cpShrunk
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endif
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DataEnd
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sBegin INITCODE
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assumes CS,CODE
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assumes DS,NOTHING
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assumes ES,NOTHING
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externNP MyLock
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if PMODE32
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externNP get_arena_pointer32
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else
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externNP get_arena_pointer
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endif
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externNP get_physical_address
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externNP set_physical_address
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externNP get_rover_2
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;-----------------------------------------------------------------------;
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; Shrink ;
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; ;
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; This shrinks what's left of win.bin. The part at the front of win.bin;
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; that has been loaded already is expendable. The part of win.bin ;
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; that has not been loaded yet is moved down over the expended part. ;
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; This does not change the segment that win.bin starts at. The ;
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; partition is then realloced down in size. ;
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; ;
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; Arguments: ;
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; none ;
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; ;
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; Returns: ;
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; ;
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; Error Returns: ;
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; ;
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; Registers Preserved: ;
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; DI,SI,DS,ES ;
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; ;
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; Registers Destroyed: ;
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; AX,BX,CX,DX ;
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; ;
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; Calls: ;
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; BigMove ;
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; GlobalReAlloc ;
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; MyLock ;
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; ;
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; History: ;
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; ;
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; Fri Feb 27, 1987 01:20:57p -by- David N. Weise [davidw] ;
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; Documented it and added this nifty comment block. ;
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;-----------------------------------------------------------------------;
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assumes ds, nothing
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assumes es, nothing
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cProc Shrink,<PUBLIC,NEAR>
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cBegin nogen
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ife ROM
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CheckKernelDS
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ReSetKernelDS
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push es
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push si
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push di
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mov ax,[segLoadBlock] ; Get current address
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mov bx, ax
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if PMODE32
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mov ds, pGlobalHeap
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UnSetKernelDS
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cCall get_arena_pointer32,<ax>
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mov edx, ds:[eax].pga_size
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shr edx, 4
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SetKernelDS
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else
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cCall get_arena_pointer,<ax>
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mov es,ax
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mov dx,es:[ga_size] ; get size of whole block
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endif
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mov ax,bx
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mov es,ax ; es is destination
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xor bx,bx
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xchg [cpShrink],bx ; Get amount to shrink by
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add [cpShrunk],bx ; Keep track of how much we have shrunk
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sub dx,bx ; get new size
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push dx ; save new size
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push ds ; save kernel ds
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if PMODE32
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mov ds, ax
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movzx esi, bx
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shl esi, 4 ; Start of new block
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xor edi, edi ; Where it will go
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movzx ecx, dx
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shl ecx, 2 ; Dwords
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cld ; Move it down.
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rep movs dword ptr es:[edi], dword ptr ds:[esi]
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db 67h ; 386 BUG, DO NOT REMOVE
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nop ; 386 BUG, DO NOT REMOVE
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else
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push dx
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xor cx,cx
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REPT 4
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shl bx,1
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rcl cx,1
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ENDM
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cCall get_physical_address,<es>
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add ax,bx
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adc dx,cx
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push es
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call get_rover_2
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smov ds,es
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assumes ds, nothing
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pop es
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cCall set_physical_address,<ds>
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pop dx
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call BigMove ; move it on down
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endif ; PMODE32
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pop ds
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CheckKernelDS
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ReSetKernelDS
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pop ax ; get back size in paragraphs
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mov cx,4
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xor dx,dx ; convert to bytes
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il3e:
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shl ax,1
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rcl dx,1
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loop il3e
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cCall GlobalReAlloc,<hLoadBlock,dxax,cx>
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cCall MyLock,<hLoadBlock>
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mov [segLoadBlock],ax
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pop di
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pop si
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pop es
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endif ;ROM
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ret
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cEnd nogen
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;-----------------------------------------------------------------------;
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; BigMove ;
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; ;
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; Moves a large partition down in memory. ;
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; ;
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; Arguments: ;
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; DX = paragraph count to move ;
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; ES = destination segment ;
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; DS = source segment ;
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; ;
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; Returns: ;
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; ;
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; Error Returns: ;
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; ;
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; Registers Preserved: ;
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; None ;
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; ;
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; Registers Destroyed: ;
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; AX,BX,CX,DX,DI,SI,DS,ES ;
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; ;
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; Calls: ;
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; nothing ;
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; ;
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; History: ;
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; ;
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; Fri Feb 27, 1987 01:08:43p -by- David N. Weise [davidw] ;
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; Documented it and added this nifty comment block. ;
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;-----------------------------------------------------------------------;
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assumes ds, nothing
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assumes es, nothing
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ife ROM
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ife PMODE32
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cProc BigMove,<PUBLIC,NEAR>
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cBegin nogen
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if PMODE32
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movzx ecx, dx
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shl ecx, 2
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xor esi, esi
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xor edi, edi
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cld
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rep movsd
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ret
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else
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mov bx,dx
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mov cl,12
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add bx,0FFFh
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shr bx,cl ; count +1 of 10000h byte moves
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xor si,si ; ds:0 is source
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xor di,di ; es:0 is dest
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cld
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jmps BM2
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BM1:
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int 3 ; IF WE HIT THIS, KRNL286.EXE IS
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int 3 ; TOO BIG, FIX THE FOLLOWING!!!
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sub dx,1000h
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;;;ife PMODE32
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mov cx,8000h
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rep movsw ; si,di are 0
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;;;else
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;;; mov cx, 4000h
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;;; rep movsd
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;;;endif
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mov ax,ds
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add ax,__ahincr
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mov ds,ax
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mov ax,es
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add ax,__ahincr
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mov es,ax
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BM2: dec bx
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jnz BM1
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;;;ife PMODE32
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mov cl,3 ; convert to words
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shl dx,cl
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mov cx,dx
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rep movsw ; si,di are 0
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;;;else
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;;; shl dx, 2 ; dwords
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;;; mov cx, dx
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;;; rep movsd
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;;;endif
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endif
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ret
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cEnd nogen
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endif ; PMODE32
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endif ; ROM
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sEnd INITCODE
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end
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