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