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Diffstat (limited to 'qemu/roms/openbios/drivers/cgthree.fs')
| -rw-r--r-- | qemu/roms/openbios/drivers/cgthree.fs | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/qemu/roms/openbios/drivers/cgthree.fs b/qemu/roms/openbios/drivers/cgthree.fs new file mode 100644 index 000000000..aa0c90cdd --- /dev/null +++ b/qemu/roms/openbios/drivers/cgthree.fs @@ -0,0 +1,197 @@ +\ +\ Fcode payload for QEMU CG3 graphics card +\ +\ This is the Forth source for an Fcode payload to initialise +\ the QEMU CG3 graphics card. +\ +\ (C) Copyright 2013 Mark Cave-Ayland +\ + +fcode-version3 + +\ +\ Instead of using fixed values for the framebuffer address and the width +\ and height, grab the ones passed in by QEMU/generated by OpenBIOS +\ + +: (find-xt) \ ( str len -- xt | -1 ) + $find if + exit + else + 2drop + -1 + then +; + +: (is-openbios) \ ( -- true | false ) + " openbios-video-width" (find-xt) -1 <> if + -1 + else + 0 + then +; + +" openbios-video-width" (find-xt) cell+ value openbios-video-width-xt +" openbios-video-height" (find-xt) cell+ value openbios-video-height-xt +" depth-bits" (find-xt) cell+ value depth-bits-xt +" line-bytes" (find-xt) cell+ value line-bytes-xt +" debug-type" (find-xt) value debug-type-xt + +: openbios-video-width + (is-openbios) if + openbios-video-width-xt @ + else + h# 400 + then +; + +: openbios-video-height + (is-openbios) if + openbios-video-height-xt @ + else + h# 300 + then +; + +: depth-bits + (is-openbios) if + depth-bits-xt @ + else + h# 8 + then +; + +: line-bytes + (is-openbios) if + line-bytes-xt @ + else + h# 400 + then +; + +: debug-type debug-type-xt execute ; + +\ +\ Registers +\ + +h# 400000 constant cg3-off-dac +h# 20 constant /cg3-off-dac + +h# 800000 constant cg3-off-fb +h# c0000 constant /cg3-off-fb + +: >cg3-reg-spec ( offset size -- encoded-reg ) + >r 0 my-address d+ my-space encode-phys r> encode-int encode+ +; + +: cg3-reg + \ A real cg3 rom appears to just map the entire region with a + \ single entry + h# 0 h# 1000000 >cg3-reg-spec + " reg" property +; + +: do-map-in ( offset size -- virt ) + >r my-space r> " map-in" $call-parent +; + +: do-map-out ( virt size ) + " map-out" $call-parent +; + +\ +\ DAC +\ + +-1 value cg3-dac +-1 value fb-addr + +: dac! ( data reg# -- ) + cg3-dac + c! +; + +external + +: color! ( r g b c# -- ) + 0 dac! ( r g b ) + swap rot ( b g r ) + 4 dac! ( b g ) + 4 dac! ( b ) + 4 dac! ( ) +; + +headerless + +\ +\ Mapping +\ + +: dac-map + cg3-off-dac /cg3-off-dac do-map-in to cg3-dac +; + +: fb-map + cg3-off-fb h# c0000 do-map-in to fb-addr +; + +: map-regs + dac-map fb-map +; + +\ +\ Installation +\ + +" cgthree" device-name +" display" device-type +" SUNW,501-1415" model + +: qemu-cg3-driver-install ( -- ) + cg3-dac -1 = if + map-regs + + \ Initial pallette taken from Sun's "Writing FCode Programs" + h# ff h# ff h# ff h# 0 color! \ Background white + h# 0 h# 0 h# 0 h# ff color! \ Foreground black + h# 64 h# 41 h# b4 h# 1 color! \ SUN-blue logo + + fb-addr to frame-buffer-adr + default-font set-font + + frame-buffer-adr encode-int " address" property + + openbios-video-width openbios-video-height over char-width / over char-height / + fb8-install + then +; + +: qemu-cg3-driver-init + + cg3-reg + + openbios-video-height encode-int " height" property + openbios-video-width encode-int " width" property + line-bytes encode-int " linebytes" property + + h# 39 encode-int 0 encode-int encode+ " intr" property + + \ Monitor sense. Some searching suggests that this is + \ 5 for 1024x768 and 7 for 1152x900 + openbios-video-width h# 480 = if + h# 7 + else + h# 5 + then + encode-int " monitor-sense" property + + " SUNW" encode-string " manufacturer" property + " ISO8859-1" encode-string " character-set" property + h# c encode-int " cursorshift" property + + ['] qemu-cg3-driver-install is-install +; + +qemu-cg3-driver-init + +end0 |