; $NetBSD: grf_ultms.g,v 1.10 2009/11/09 15:35:27 is Exp $
;
; ite support for A2410.
;
; Copyright (c) 1995 Ignatios Souvatzis.
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
; 1. Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
; 2. Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in the
; documentation and/or other materials provided with the distribution.
;
; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
; This file contains the source code for grf_ultms.c. It is assembler
; code for the TMS34010 CPU/graphics processor, as understood by the
; in-tree version of Paul Mackerras' "gspa" assembler.
;
; Use 'make grf_ultms.c' to generate the .c file.
; memory map:
; FF800000 .. FF9FFFFF overlay planes
; FFA00000 .. FFA0FFFF ite support code
; FFA10000 .. FFA1FFFF ite support, input queue
; FFA20000 .. FFA2FEFF variables
; FFA2FF00 .. FFA2FFFF variables, X server
; FFA30000 .. FFA3FFFF font data
; FFA40000 .. FFA4FFFF font data, bold
; FFA50000 .. FFA5FFFF X server, input queue
; FFA60000 .. FFFFC000 X server, onboard pixmaps
; Start of data area
.org $FFA20000
d:
;
; Ring buffer for getting stuff from host
; Data buffer:
inbuf = $FFA10000 ; 64kbits here (8k bytes)
;
; Pointers: (these must be at address $FFA20000)
put: .long inbuf
get: .long inbuf
;
; Mode bits for communication between GSP and CPU
;
; GSP mode bits: set by CPU, control GSP operation
GSP_HOLD = 0
GSP_FLUSH = 1
GSP_ALT_SCRN = 2
GSP_DISP_CTRL = 3
GSP_NO_CURSOR = 4
GSP_CALL_X = 5
gsp_mode: .word 0
;
; Pointer to X operation routine
xproc: .long 0
; We leave the next few words for future communication requirements
.org d+0x100
;
; Other data:
magic: .blkl 1 ; set => screen already inited
MAGIC = 0xD0D0BEAC
screen_width: .word 1024
screen_height: .word 768
screen_origin: .long $FE000000 ; just a placeholder
screen_pitch: .word 8192 ; 1024*8
pixel_size: .word 8
.org d+0x200
font_adr:
;
; Font information is stored in the structure defined declared below.
;
bitmap_ptrs: .long $FFA30000 ; points to first bitmap
font_size: .long $00080008 ; Y:X bitmap size
under_row: .word 6 ; row # for underlines
under_ht: .word 1 ; thickness of underline
first_char: .word 32 ; first and last char in font
last_char: .word 255 ;
bold_smear: .word 1 ; for making bold fonts
bgcolor: .long 0 ; background color
fgcolor: .long $01010101 ; foreground color
;precomputed out of what the host gave us:
font_area: .word 64 ; in pixels
font_pitch: .word 8
font_lmo: .word 28
; Control register addresses
hesync = $c0000000
dpyctl = $c0000080
control = $c00000b0
convsp = $c0000130
convdp = $c0000140
psize = $c0000150
;
; Bits in control register
T = $20 ; enable transparency
W = $C0 ; window options
PBH = $100 ; pixblt horiz dirn
PBV = $200 ; pixblt vertical dirn
PPOP = $7C00 ; pixel processing options
;
; Bits in dpyctl register
SRT = $800 ; do serial register transfers
free_memory: .long free_memory_start
free_memory_start: ; allocate dynamic arrays from here
;
; Program starts here.
.org $FFA00000
.start .
;
; initialization
;
setf 16,0,0 ; just in case
setf 32,0,1
move $fffff000,sp
; Set up sync, blank parameters
; done by host through interface
; set up overlay clut:
move $0,a0
move a0,@$fe800000
move $fe800030,a1
move 128,a0
move a0,*a1
move a0,*a1
move a0,*a1
move 0,a0
move a0,*a1
move a0,*a1
move a0,*a1
move a0,*a1
move a0,*a1
move a0,*a1
move a0,*a1
move a0,*a1
move a0,*a1
; set up overlay planes:
move 6,a0
move a0,@$fe800000
move $0b,a0
move a0,@$fe800020
; set up global registers
move @screen_pitch,b3,0
move @screen_origin,b4,1
move @bgcolor,b8,1
lmo b3,b0
move b0,@convdp,0
move @control,a0,0
andn $7FE0,a0 ; clear PPOP, PBV, PBH, W, T fields
move a0,@control,0
move @pixel_size,a0,0
move a0,@psize,0
move @psize,a0,0
; clear the entire screen
move b4,b2
move 0,b9
move @screen_width,b7,1
fill l
4:
; main stuff...
move @get,a0,1
jruc main_loop
loop_end:
clr a4
move a4,*a0,0
addxy a1,a0
move a0,@get,1
main_loop:
move @gsp_mode,a1,0
btst GSP_CALL_X,a1
jreq main_loop_1
mmtm sp,a0,a1,a2,a3
move @xproc,a4,1
call a4
mmfm sp,a0,a1,a2,a3
main_loop_1:
move @put,a3,1
move *a0,a1,0
move a1,a2
andi $FFF0,a1
jrz main_loop
sub a0,a3
jreq main_loop
continue:
andi $F,a2
jrz loop_end
dec a2
jrnz testfor2
; op 1 - char
movk 6,b10
move b10,@$fe800000,0
movk 1,b10
move b10,@$fe800020,0
move a0,b10
move *b10+,b12,0 ; dummy move (faster than addk)
move *b10+,b12,0 ; char code
move @first_char,b11,0
sub b11,b12 ; minus first char in font
move @font_size,b7,1 ;dydx - char size->pixel array dimensions
move @font_pitch,b1
move @font_lmo,b0
move b0,@convsp,0
move @font_area,b11
mpyu b12,b11 ; times char offset
move @font_adr,b0,1 ; font bitmaps base
add b11,b0 ; character bitmap start addr. linear
move *b10+,b8,0 ; fg
move *b10+,b9,0 ; bg
move *b10+,b2,1 ; y:x
move *b10+,b11,0 ; flags
move b11,a4
btst 0,a4
jreq noinv
move b8,b11
move b9,b8
move b11,b9
noinv:
btst 2,a4
jreq nobold
addi $10000,b0
nobold:
move b2,a5
pixblt b,xy
move a5,b2
btst 1,a4
jreq noul
move @under_row,b11,0
sll 16,b11 ; shift into Y half
add b11,b2
move @under_ht,b11,0
sll 16,b11 ; shift into Y half
movy b11,b7 ; and move Y half only
fill xy
noul:
jruc loop_end
testfor2:
dec a2
jrnz testfor3
; op 2 - fill
move a0,b10
move *b10+,b9,0 ; dummy move
move *b10+,b9,0 ; color
move *b10+,b2,1 ; XY start address
move *b10+,b7,1 ; dydx
move @control,b0,0
move b0,*-sp
move *b10+,b0
setf 5,0,0
move b0,@control+10
setf 16,0,0
move @control,b0,0
fill xy
move *sp+,b0
move b0,@control,0
jruc loop_end,l
testfor3:
dec a2
jrnz testfor4
; op 3 - pixblt
move a0,b10
move @convdp,@convsp,0
move *b10+,b0,0 ; dummy move
move *b10+,b0,1 ; XY src
move *b10+,b7,1 ; dxdy
move *b10+,b2,1 ; XY dst
move b3,b1
move @control,b11,0
andni PBH|PBV,b11
cmpxy b0,b2
jrc yok
ori PBV,b11
yok: jrv xok
ori PBH,b11
xok: move b11,@control,0
move @control,b11,0
pixblt xy,xy
jruc loop_end,l
testfor4:
dec a2
jrnz testfor5
; op 4 - mirror the font and precompute some values.
move @font_size,a5,0
movk 8,a6
cmp a6,a5
jrle t4b8
movi 16, a6
t4b8: move a6,@font_pitch,0
lmo a5,a6
move a6,@font_lmo,0
move @font_size+$10,a6,0
move @font_pitch,a5,0
mpyu a6,a5
move a5,@font_area,0
move @last_char,a6,0
move @first_char,a5,0
sub a5,a6
addk 1,a6
move @font_size+$10,a5,0
mpyu a6,a5
move @font_size,a7,0
cmpi 8,a7
move $7f7f,a12 ; mask for bold smearing
jrgt t4bf ; wider than 8 pixels?
addk 1,a5 ; yes, the words are only half the # of rows
srl 1,a5
move $7fff,a12 ; mask for bold smearing changes, too
t4bf: move @font_adr,a6,1
move a6,a9
addi $10000,a9 ; start address of bold font
move @bold_smear,a10
; fortunately, this loop fits into 3 of the 4 cache segments:
; execution time: about 32 periods per word of font.
mirlp: move *a6,a7
clr a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
srl 1,a7
addc a8,a8
move a8,*a6+
move a8,a7
move a10,a11
smearlp:
and a12,a7
sll 1,a7
or a7,a8
dsj a11,smearlp
move a8,*a9+
dsj a5,mirlp
;; support odd-sized fonts. pitch must still be 8 or 16
move @font_size,a5,0
move @font_pitch,a6,0
sub a5,a6
move @font_adr,a5,1
add a5,a6
move a6,@font_adr,1
;;
jruc loop_end,l
testfor5:
dec a2
jrne testfor6
; loadclut --- load clut entry.
; 1==overlay index red green blue
; for speed reasons, the host will load the image clut directly rather
; than through us, but its not that expensive to support both here
; just in case
move a0,a4
addk $10,a4
move $fe800030,a6
move *a4+,a5,0
jrne t5l1
subk $20,a6
t5l1: move *a4+,a5,0
move a5,@$fe800000,0
move *a4+,a5,0
move a5,*a6,0
move *a4+,a5,0
move a5,*a6,0
move *a4+,a5,0
move a5,*a6,0
jruc loop_end,l
testfor6:
dec a2
jrne testfor7
; op 6: load new framebuffer size and position for ite support.
move a0,b10
addk $10,b10
move *b10+,b7,1
move b7,@screen_width,1
move *b10+,b4,1
move b4,@screen_origin,1
move *b10+,b3,0
move b3,@screen_pitch,0
lmo b3,b0
move b0,@convdp,0
move *b10,b0,0
move b0,@psize,0
move b0,@pixel_size,0 ; this syncs the psize write, too
jruc loop_end,l
testfor7:
jruc loop_end,l
;;;