diff options
Diffstat (limited to 'qemu/roms/SLOF/slof/fs/pci-config-bridge.fs')
| -rw-r--r-- | qemu/roms/SLOF/slof/fs/pci-config-bridge.fs | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/slof/fs/pci-config-bridge.fs b/qemu/roms/SLOF/slof/fs/pci-config-bridge.fs new file mode 100644 index 000000000..689325318 --- /dev/null +++ b/qemu/roms/SLOF/slof/fs/pci-config-bridge.fs @@ -0,0 +1,111 @@ +\ ***************************************************************************** +\ * Copyright (c) 2004, 2011 IBM Corporation +\ * All rights reserved. +\ * This program and the accompanying materials +\ * are made available under the terms of the BSD License +\ * which accompanies this distribution, and is available at +\ * http://www.opensource.org/licenses/bsd-license.php +\ * +\ * Contributors: +\ * IBM Corporation - initial implementation +\ ****************************************************************************/ + +\ Generic config space access function - xt is execution token of rtas-config-xx +: config-xt ( config-addr xt -- data ) + puid >r \ Safe puid + my-puid TO puid \ Set my-puid + swap dup ffff00 AND 0= IF \ Has bus-device-function been specified? + my-space OR \ No: use my-space instead + THEN + swap execute \ Execute the rtas-config-xx function + r> TO puid \ Restore previous puid +; + +\ define the config reads +: config-b@ ( config-addr -- data ) ['] rtas-config-b@ config-xt ; +: config-w@ ( config-addr -- data ) ['] rtas-config-w@ config-xt ; +: config-l@ ( config-addr -- data ) ['] rtas-config-l@ config-xt ; + +\ define the config writes +: config-b! ( data config-addr -- ) ['] rtas-config-b! config-xt ; +: config-w! ( data config-addr -- ) ['] rtas-config-w! config-xt ; +: config-l! ( data config-addr -- ) ['] rtas-config-l! config-xt ; + +\ for Debug purposes: dumps the whole config space +: config-dump puid >r my-puid TO puid my-space pci-dump r> TO puid ; + +\ needed to find the right path in the device tree +: decode-unit ( addr len -- phys.lo ... phys.hi ) + 2 hex-decode-unit \ decode string + B lshift swap \ shift the devicenumber to the right spot + 8 lshift or \ add the functionnumber + my-bus 10 lshift or \ add the busnumber + 0 0 rot \ make phys.lo = 0 = phys.mid +; + +\ needed to have the right unit address in the device tree listing +\ phys.lo=phys.mid=0 , phys.hi=config-address +: encode-unit ( phys.lo ... phys.hi -- unit-str unit-len ) + nip nip \ forget the both zeros + dup 8 rshift 7 and swap \ calc Functionnumber + B rshift 1F and \ calc Devicenumber + over IF \ IF Function!=0 + 2 hex-encode-unit \ | create string with DevNum,FnNum + ELSE \ ELSE + nip 1 hex-encode-unit \ | create string with only DevNum + THEN \ FI +; + +: map-in ( phys.lo phys.mid phys.hi size -- virt ) + \ ." map-in called: " .s cr + \ Ignore the size, phys.lo and phys.mid, get BAR from config space + drop nip nip ( phys.hi ) + \ Sanity check whether config address is in expected range: + dup FF AND dup 10 28 WITHIN NOT swap 30 <> AND IF + cr ." phys.hi = " . cr + ABORT" map-in with illegal config space address" + THEN + 00FFFFFF AND \ Need only bus-dev-fn+register bits + dup config-l@ ( phys.hi' bar.lo ) + dup 7 AND 4 = IF \ Is it a 64-bit BAR? + swap 4 + config-l@ lxjoin \ Add upper part of 64-bit BAR + ELSE + nip + THEN + F NOT AND \ Clear indicator bits + \ TODO: Use translate-address here! +; + +: map-out ( virt size -- ) + \ ." map-out called: " .s cr + 2drop +; + +: dma-alloc ( ... size -- virt ) + \ ." dma-alloc called: " .s cr + alloc-mem +; + +: dma-free ( virt size -- ) + \ ." dma-free called: " .s cr + free-mem +; + +: dma-map-in ( ... virt size cacheable? -- devaddr ) + \ ." dma-map-in called: " .s cr + 2drop +; + +: dma-map-out ( virt devaddr size -- ) + \ ." dma-map-out called: " .s cr + 2drop drop +; + +: dma-sync ( virt devaddr size -- ) + \ XXX should we add at least a memory barrier here? + \ ." dma-sync called: " .s cr + 2drop drop +; + +: open true ; +: close ; |