| \ ***************************************************************************** |
| \ * 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 |
| \ ****************************************************************************/ |
| |
| \ PAPR PCI host bridge. |
| |
| 0 VALUE phb-debug? |
| |
| |
| ." Populating " pwd cr |
| |
| \ 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 (assume always bus 0) |
| 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-mid phys.hi -- unit-str unit-len ) |
| nip nip \ forget the phys.lo and phys.mid |
| dup 8 rshift 7 and swap \ calculate function number |
| B rshift 1F and \ calculate device number |
| over IF 2 ELSE nip 1 THEN \ create string with dev#,fn# or dev# only? |
| hex-encode-unit |
| ; |
| |
| |
| 0 VALUE my-puid |
| |
| : setup-puid |
| s" reg" get-node get-property 0= IF |
| decode-64 to my-puid 2drop |
| THEN |
| ; |
| |
| setup-puid |
| |
| : config-b@ puid >r my-puid TO puid rtas-config-b@ r> TO puid ; |
| : config-w@ puid >r my-puid TO puid rtas-config-w@ r> TO puid ; |
| : config-l@ puid >r my-puid TO puid rtas-config-l@ r> TO puid ; |
| |
| \ define the config writes |
| : config-b! puid >r my-puid TO puid rtas-config-b! r> TO puid ; |
| : config-w! puid >r my-puid TO puid rtas-config-w! r> TO puid ; |
| : config-l! puid >r my-puid TO puid rtas-config-l! r> TO puid ; |
| |
| |
| : map-in ( phys.lo phys.mid phys.hi size -- virt ) |
| phb-debug? IF cr ." map-in called: " .s cr THEN |
| \ 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 |
| translate-my-address |
| phb-debug? IF ." map-in done: " .s cr THEN |
| ; |
| |
| : map-out ( virt size -- ) |
| phb-debug? IF ." map-out called: " .s cr THEN |
| 2drop |
| ; |
| |
| |
| : dma-alloc ( size -- virt ) |
| phb-debug? IF cr ." dma-alloc called: " .s cr THEN |
| fff + fff not and \ Align size to next 4k boundary |
| alloc-mem |
| \ alloc-mem always returns aligned memory - double check just to be sure |
| dup fff and IF |
| ." Warning: dma-alloc got unaligned memory!" cr |
| THEN |
| ; |
| |
| : dma-free ( virt size -- ) |
| phb-debug? IF cr ." dma-free called: " .s cr THEN |
| fff + fff not and \ Align size to next 4k boundary |
| free-mem |
| ; |
| |
| |
| \ Helper variables for dma-map-in and dma-map-out |
| 0 VALUE dma-window-liobn \ Logical I/O bus number |
| 0 VALUE dma-window-base \ Start address of window |
| 0 VALUE dma-window-size \ Size of the window |
| |
| 0 VALUE bm-handle \ Bitmap allocator handle |
| 0 VALUE my-virt |
| 0 VALUE my-size |
| 0 VALUE dev-addr |
| 0 VALUE tmp-dev-addr |
| |
| \ Read helper variables (LIOBN, DMA window base and size) from the |
| \ "ibm,dma-window" property. This property can be either located |
| \ in the PCI device node or in the bus node, so we've got to use the |
| \ "calling-child" variable here to get to the node that initiated the call. |
| \ XXX We should search all the way up the tree to the PHB ... |
| : (init-dma-window-vars) ( -- ) |
| \ ." Foo called in " pwd cr |
| \ ." calling child is " calling-child .node cr |
| \ ." parent is " calling-child parent .node cr |
| s" ibm,dma-window" calling-child get-property IF |
| s" ibm,dma-window" calling-child parent get-property |
| ABORT" no dma-window property available" |
| THEN |
| decode-int TO dma-window-liobn |
| decode-64 TO dma-window-base |
| decode-64 TO dma-window-size |
| 2drop |
| bm-handle 0= IF |
| dma-window-base dma-window-size 1000 bm-allocator-init to bm-handle |
| \ Sometimes the window-base appears as zero, that does not |
| \ go well with NULL pointers. So block this address |
| dma-window-base 0= IF |
| bm-handle 1000 bm-alloc drop |
| THEN |
| THEN |
| ; |
| |
| : (clear-dma-window-vars) ( -- ) |
| 0 TO dma-window-liobn |
| 0 TO dma-window-base |
| 0 TO dma-window-size |
| ; |
| |
| \ We assume that firmware never maps more than the whole dma-window-size |
| \ so we cheat by calculating the remainder of addr/windowsize instead |
| \ of taking care to maintain a list of assigned device addresses |
| : dma-virt2dev ( virt -- devaddr ) |
| dma-window-size mod dma-window-base + |
| ; |
| |
| : dma-map-in ( virt size cachable? -- devaddr ) |
| phb-debug? IF cr ." dma-map-in called: " .s cr THEN |
| (init-dma-window-vars) |
| drop ( virt size ) |
| |
| to my-size |
| to my-virt |
| bm-handle my-size bm-alloc |
| to dev-addr |
| dev-addr 0 < IF |
| ." Bitmap allocation Failed " dev-addr . |
| FALSE EXIT |
| THEN |
| dev-addr to tmp-dev-addr |
| |
| my-virt my-size |
| bounds dup >r ( v+s virt R: virt ) |
| swap fff + fff not and \ Align end to next 4k boundary |
| swap fff not and ( v+s' virt' R: virt ) |
| ?DO |
| \ ." mapping " i . cr |
| dma-window-liobn \ liobn |
| tmp-dev-addr \ ioba |
| i 3 OR \ Make a read- & writeable TCE |
| ( liobn ioba tce R: virt ) |
| hv-put-tce ABORT" H_PUT_TCE failed" |
| tmp-dev-addr 1000 + to tmp-dev-addr |
| 1000 +LOOP |
| r> drop |
| my-virt FFF and dev-addr or |
| (clear-dma-window-vars) |
| ; |
| |
| : dma-map-out ( virt devaddr size -- ) |
| phb-debug? IF cr ." dma-map-out called: " .s cr THEN |
| (init-dma-window-vars) |
| to my-size |
| to dev-addr |
| to my-virt |
| dev-addr fff not and to dev-addr |
| dev-addr to tmp-dev-addr |
| |
| my-virt my-size ( virt size ) |
| bounds ( v+s virt ) |
| swap fff + fff not and \ Align end to next 4k boundary |
| swap fff not and ( v+s' virt' ) |
| ?DO |
| \ ." unmapping " i . cr |
| dma-window-liobn \ liobn |
| tmp-dev-addr \ ioba |
| i \ Lowest bits not set => invalid TCE |
| ( liobn ioba tce ) |
| hv-put-tce ABORT" H_PUT_TCE failed" |
| tmp-dev-addr 1000 + to tmp-dev-addr |
| 1000 +LOOP |
| bm-handle dev-addr my-size bm-free |
| (clear-dma-window-vars) |
| ; |
| |
| : dma-sync ( virt devaddr size -- ) |
| phb-debug? IF cr ." dma-sync called: " .s cr THEN |
| \ TODO: Call flush-cache or sync here? |
| 3drop |
| ; |
| |
| |
| : open true ; |
| : close ; |
| |
| \ Parse the "ranges" property of the root pci node to decode the available |
| \ memory ranges. See "PCI Bus Binding to IEEE Std 1275-1994" for details. |
| \ The memory ranges are then used for setting up the device bars (if necessary) |
| : phb-parse-ranges ( -- ) |
| \ First clear everything, in case there is something missing in the ranges |
| 0 pci-next-io ! |
| 0 pci-max-io ! |
| 0 pci-next-mem ! |
| 0 pci-max-mem ! |
| 0 pci-next-mmio ! |
| 0 pci-max-mmio ! |
| |
| \ Now get the "ranges" property |
| s" ranges" get-node get-property 0<> ABORT" ranges property not found" |
| ( prop-addr prop-len ) |
| BEGIN |
| dup |
| WHILE |
| decode-int \ Decode phys.hi |
| 3000000 AND \ Filter out address space in phys.hi |
| CASE |
| 1000000 OF \ I/O space? |
| decode-64 dup >r pci-next-io ! \ Decode PCI base address |
| decode-64 drop \ Forget the parent address |
| decode-64 r> + pci-max-io ! \ Decode size & calc max address |
| pci-next-io @ 0= IF |
| pci-next-io @ 10 + pci-next-io ! \ BARs must not be set to zero |
| THEN |
| ENDOF |
| 2000000 OF \ 32-bit memory space? |
| decode-64 pci-next-mem ! \ Decode mem base address |
| decode-64 drop \ Forget the parent address |
| decode-64 2 / dup >r \ Decode and calc size/2 |
| pci-next-mem @ + dup pci-max-mem ! \ and calc max mem address |
| dup pci-next-mmio ! \ which is the same as MMIO base |
| r> + pci-max-mmio ! \ calc max MMIO address |
| ENDOF |
| 3000000 OF \ 64-bit memory space? |
| cr ." Warning: 64-bit PCI space not supported yet! " |
| decode-64 . decode-64 . cr |
| ENDOF |
| ENDCASE |
| REPEAT |
| ( prop-addr prop-len ) |
| 2drop |
| |
| phb-debug? IF |
| ." pci-next-io = " pci-next-io @ . cr |
| ." pci-max-io = " pci-max-io @ . cr |
| ." pci-next-mem = " pci-next-mem @ . cr |
| ." pci-max-mem = " pci-max-mem @ . cr |
| ." pci-next-mmio = " pci-next-mmio @ . cr |
| ." pci-max-mmio = " pci-max-mmio @ . cr |
| THEN |
| ; |
| |
| \ Scan the child nodes of the pci root node to assign bars, fixup |
| \ properties etc. |
| : phb-setup-children |
| puid >r \ Save old value of puid |
| my-puid TO puid \ Set current puid |
| phb-parse-ranges |
| 1 TO pci-hotplug-enabled |
| 1 0 (probe-pci-host-bridge) |
| r> TO puid \ Restore previous puid |
| ; |
| phb-setup-children |
