mirror of https://gitee.com/openkylin/linux.git
99 lines
2.9 KiB
NASM
99 lines
2.9 KiB
NASM
|
; Author: Frederik Noring <noring@nocrew.org>
|
||
|
|
;
|
||
|
|
; This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
; License. See the file COPYING in the main directory of this archive
|
||
|
|
; for more details.
|
||
|
|
|
||
|
|
; DSP56k loader
|
||
|
|
|
||
|
|
; Host Interface
|
||
|
|
M_BCR EQU $FFFE ; Port A Bus Control Register
|
||
|
|
M_PBC EQU $FFE0 ; Port B Control Register
|
||
|
|
M_PBDDR EQU $FFE2 ; Port B Data Direction Register
|
||
|
|
M_PBD EQU $FFE4 ; Port B Data Register
|
||
|
|
M_PCC EQU $FFE1 ; Port C Control Register
|
||
|
|
M_PCDDR EQU $FFE3 ; Port C Data Direction Register
|
||
|
|
M_PCD EQU $FFE5 ; Port C Data Register
|
||
|
|
|
||
|
|
M_HCR EQU $FFE8 ; Host Control Register
|
||
|
|
M_HSR EQU $FFE9 ; Host Status Register
|
||
|
|
M_HRX EQU $FFEB ; Host Receive Data Register
|
||
|
|
M_HTX EQU $FFEB ; Host Transmit Data Register
|
||
|
|
|
||
|
|
; SSI, Synchronous Serial Interface
|
||
|
|
M_RX EQU $FFEF ; Serial Receive Data Register
|
||
|
|
M_TX EQU $FFEF ; Serial Transmit Data Register
|
||
|
|
M_CRA EQU $FFEC ; SSI Control Register A
|
||
|
|
M_CRB EQU $FFED ; SSI Control Register B
|
||
|
|
M_SR EQU $FFEE ; SSI Status Register
|
||
|
|
M_TSR EQU $FFEE ; SSI Time Slot Register
|
||
|
|
|
||
|
|
; Exception Processing
|
||
|
|
M_IPR EQU $FFFF ; Interrupt Priority Register
|
||
|
|
|
||
|
|
org P:$0
|
||
|
|
start jmp <$40
|
||
|
|
|
||
|
|
org P:$40
|
||
|
|
; ; Zero 16384 DSP X and Y words
|
||
|
|
; clr A #0,r0
|
||
|
|
; clr B #0,r4
|
||
|
|
; do #64,<_block1
|
||
|
|
; rep #256
|
||
|
|
; move A,X:(r0)+ B,Y:(r4)+
|
||
|
|
;_block1 ; Zero (32768-512) Program words
|
||
|
|
; clr A #512,r0
|
||
|
|
; do #126,<_block2
|
||
|
|
; rep #256
|
||
|
|
; move A,P:(r0)+
|
||
|
|
;_block2
|
||
|
|
|
||
|
|
; Copy DSP program control
|
||
|
|
move #real,r0
|
||
|
|
move #upload,r1
|
||
|
|
do #upload_end-upload,<_copy
|
||
|
|
move P:(r0)+,x0
|
||
|
|
move x0,P:(r1)+
|
||
|
|
_copy movep #>4,X:<<M_HCR
|
||
|
|
movep #>$c00,X:<<M_IPR
|
||
|
|
and #<$fe,mr
|
||
|
|
jmp upload
|
||
|
|
|
||
|
|
real
|
||
|
|
org P:$7ea9
|
||
|
|
upload
|
||
|
|
movep #>1,X:<<M_PBC
|
||
|
|
movep #>0,X:<<M_BCR
|
||
|
|
|
||
|
|
next jclr #0,X:<<M_HSR,*
|
||
|
|
movep X:<<M_HRX,A
|
||
|
|
move #>3,x0
|
||
|
|
cmp x0,A #>1,x0
|
||
|
|
jeq <$0
|
||
|
|
_get_address
|
||
|
|
jclr #0,X:<<M_HSR,_get_address
|
||
|
|
movep X:<<M_HRX,r0
|
||
|
|
_get_length
|
||
|
|
jclr #0,X:<<M_HSR,_get_length
|
||
|
|
movep X:<<M_HRX,y0
|
||
|
|
cmp x0,A #>2,x0
|
||
|
|
jeq load_X
|
||
|
|
cmp x0,A
|
||
|
|
jeq load_Y
|
||
|
|
|
||
|
|
load_P do y0,_load
|
||
|
|
jclr #0,X:<<M_HSR,*
|
||
|
|
movep X:<<M_HRX,P:(r0)+
|
||
|
|
_load jmp next
|
||
|
|
load_X do y0,_load
|
||
|
|
jclr #0,X:<<M_HSR,*
|
||
|
|
movep X:<<M_HRX,X:(r0)+
|
||
|
|
_load jmp next
|
||
|
|
load_Y do y0,_load
|
||
|
|
jclr #0,X:<<M_HSR,*
|
||
|
|
movep X:<<M_HRX,Y:(r0)+
|
||
|
|
_load jmp next
|
||
|
|
|
||
|
|
upload_end
|
||
|
|
end
|