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kernel
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intr() cleanup and small optimizations. 

git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@628 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2003-06-30 18:42:51 +00:00
parent 18fa8e0091
commit d60b01e511
1 changed files with 60 additions and 114 deletions
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174
kernel/intr.asm
View File

@ -21,13 +21,63 @@
;
; You should have received a copy of the GNU General Public
; License along with DOS-C; see the file COPYING. If not,
; write to the Free Software Foundation, 675 Mass Ave,
; Cambridge, MA 02139, USA.
; write to the Free Software Foundation, Inc.,
; 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
;
%include "segs.inc"
%macro INTR 0
push bp ; Standard C entry
mov bp,sp
push si
push di
push ds
push es
mov ax, [bp+4] ; interrupt number
mov [cs:%%intr_1-1], al
jmp short %%intr_2 ; flush the instruction cache
%%intr_2 mov bx, [bp+6] ; regpack structure
mov ax, [bx]
mov cx, [bx+4]
mov dx, [bx+6]
mov si, [bx+8]
mov di, [bx+10]
mov bp, [bx+12]
push word [bx+14] ; ds
mov es, [bx+16]
mov bx, [bx+2]
pop ds
int 0
%%intr_1:
pushf
push ds
push bx
mov bx, sp
mov ds, [ss:bx+8]
mov bx, [ss:bx+20] ; address of REGPACK
mov [bx], ax
pop word [bx+2]
mov [bx+4], cx
mov [bx+6], dx
mov [bx+8], si
mov [bx+10], di
mov [bx+12], bp
pop word [bx+14]
mov [bx+16], es
pop word [bx+22]
pop es
pop ds
pop di
pop si
pop bp
ret
%endmacro
segment HMA_TEXT
;
; void intr(nr, rp)
@ -35,60 +85,9 @@ segment HMA_TEXT
; REG struct REGPACK *rp
;
;
global _intr
global _intr
_intr:
push bp ; Standard C entry
mov bp,sp
push si
push di
push ds
push es
mov ax, [bp+4] ; interrupt number
mov [CS:intr?1-1], al
jmp short intr?2 ; flush the instruction cache
intr?2 mov bx, [bp+6] ; regpack structure
mov ax, [bx]
mov cx, [bx+4]
mov dx, [bx+6]
mov si, [bx+8]
mov di, [bx+10]
mov bp, [bx+12]
push Word [bx+14] ; ds
mov es, [bx+16]
mov bx, [bx+2]
pop ds
int 0
intr?1:
pushf
push ds
push bx
mov bx, sp
mov ds, [SS:bx+8]
mov bx, [ss:bx+20] ; address of REGPACK
mov [bx], ax
pop ax
mov [bx+2], ax
mov [bx+4], cx
mov [bx+6], dx
mov [bx+8], si
mov [bx+10], di
mov [bx+12], bp
pop ax
mov [bx+14], ax
mov [bx+16], es
pop ax
mov [bx+22], ax
pop es
pop ds
pop di
pop si
pop bp
ret
INTR
segment INIT_TEXT
;
@ -97,60 +96,9 @@ segment INIT_TEXT
; REG struct REGPACK *rp
;
; same stuff as above, but in INIT_SEGMENT
global _init_call_intr
global _init_call_intr
_init_call_intr:
push bp ; Standard C entry
mov bp,sp
push si
push di
push ds
push es
mov ax, [bp+4] ; interrupt number
mov [CS:init_intr?1-1], al
jmp short init_intr?2 ; flush the instruction cache
init_intr?2 mov bx, [bp+6] ; regpack structure
mov ax, [bx]
mov cx, [bx+4]
mov dx, [bx+6]
mov si, [bx+8]
mov di, [bx+10]
mov bp, [bx+12]
push Word [bx+14] ; ds
mov es, [bx+16]
mov bx, [bx+2]
pop ds
int 0
init_intr?1:
pushf
push ds
push bx
mov bx, sp
mov ds, [SS:bx+8]
mov bx, [ss:bx+20] ; address of REGPACK
mov [bx], ax
pop ax
mov [bx+2], ax
mov [bx+4], cx
mov [bx+6], dx
mov [bx+8], si
mov [bx+10], di
mov [bx+12], bp
pop ax
mov [bx+14], ax
mov [bx+16], es
pop ax
mov [bx+22], ax
pop es
pop ds
pop di
pop si
pop bp
ret
INTR
;
; int init_call_XMScall( (WORD FAR * driverAddress)(), WORD AX, WORD DX)
@ -282,13 +230,14 @@ _init_DosExec:
int 21h
jc short exec_no_error
xor ax, ax
exec_no_error
exec_no_error:
ret
;; int init_setdrive(int drive)
global _init_setdrive
_init_setdrive:
mov ah, 0x0e
common_dl_int21:
mov bx, sp
mov dl, [bx+2]
int 21h
@ -298,10 +247,7 @@ _init_setdrive:
global _init_switchar
_init_switchar:
mov ax, 0x3701
mov bx, sp
mov dl, [bx+2]
int 21h
ret
jmp short common_dl_int21
;; int allocmem(UWORD size, seg *segp)
global _allocmem