\ ***************************************************************************** \ * Copyright (c) 2004, 2008 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 \ ****************************************************************************/ \ ---------------------------------------------------------- \ ********** Variables to be set by host bridge ********** \ ---------------------------------------------------------- \ Values of the next free memory area VARIABLE pci-next-mem \ prefetchable memory mapped VARIABLE pci-max-mem VARIABLE pci-next-mmio \ non-prefetchable memory VARIABLE pci-max-mmio VARIABLE pci-next-io \ I/O space VARIABLE pci-max-io VARIABLE pci-next-mem64 \ prefetchable 64-bit memory mapped VARIABLE pci-max-mem64 \ Counter of busses found 0 VALUE pci-bus-number \ Counter of devices found 0 VALUE pci-device-number \ bit field of devices plugged into this bridge 0 VALUE pci-device-slots \ byte field holding the device-slot number vector of the current device \ the vector can be as deep as the max depth of bridges possible \ 3,4,5 means \ the 5th slot on the bus of the bridge in \ the 4th slot on the bus of the bridge in \ the 3rd slot on the HostBridge bus here 100 allot CONSTANT pci-device-vec 0 VALUE pci-device-vec-len \ enable/disable creation of hotplug-specific properties 0 VALUE pci-hotplug-enabled \ Fixme Glue to the pci-devices ... remove this later : next-pci-mem ( addr -- addr ) pci-next-mem ; : next-pci-mmio ( addr -- addr ) pci-next-mmio ; : next-pci-io ( addr -- addr ) pci-next-io ; #include "pci-helper.fs" \ Dump out the pci device-slot vector : pci-vec ( -- ) cr s" device-vec(" type pci-device-vec-len dup 2 0.r s" ):" type 1+ 0 DO pci-device-vec i + c@ space 2 0.r LOOP cr ; \ prints out all relevant pci variables : pci-var-out ( -- ) s" mem:" type pci-next-mem @ 16 0.r cr s" mmio:" type pci-next-mmio @ 16 0.r cr s" io:" type pci-next-io @ 16 0.r cr ; \ Update the device-slot number vector \ Set the bit of the DeviceSlot in the Slot array : pci-set-slot ( addr -- ) pci-addr2dev dup \ calc slot number pci-device-vec-len \ the end of the vector pci-device-vec + c! \ and update the vector 80000000 swap rshift \ calc bit position of the device slot pci-device-slots or \ set this bit TO pci-device-slots \ and write it back ; \ Update pci-next-mmio to be 1MB aligned and set the mmio-base register \ and set the Limit register to the maximum available address space \ needed for scanning possible devices behind the bridge : pci-bridge-set-mmio-base ( addr -- ) pci-next-mmio @ 100000 #aligned \ read the current Value and align to 1MB boundary dup 100000 + pci-next-mmio ! \ and write back with 1MB for bridge 10 rshift \ mmio-base reg is only the upper 16 bits pci-max-mmio @ 1- FFFF0000 and or \ and Insert mmio Limit (set it to max) swap 20 + rtas-config-l! \ and write it into the bridge ; \ Update pci-next-mmio to be 1MB aligned and set the mmio-limit register \ The Limit Value is one less then the upper boundary \ If the limit is less than the base the mmio is disabled : pci-bridge-set-mmio-limit ( addr -- ) pci-next-mmio @ 100000 #aligned \ fetch current value and align to 1MB dup pci-next-mmio ! \ and write it back 1- FFFF0000 and \ make it one less and keep upper 16 bits over 20 + rtas-config-l@ 0000FFFF and \ fetch original value or swap 20 + rtas-config-l! \ and write it into the Reg ; \ Update pci-next-mem to be 1MB aligned and set the mem-base and mem-base-upper register \ and set the Limit register to the maximum available address space \ needed for scanning possible devices behind the bridge : pci-bridge-set-mem-base ( addr -- ) pci-next-mem @ 100000 #aligned \ read the current Value and align to 1MB boundary dup 100000 + pci-next-mem ! \ and write back with 1MB for bridge over 24 + rtas-config-w@ \ check if 64bit support 1 and IF \ IF 64 bit support 2dup 20 rshift \ | keep upper 32 bits swap 28 + rtas-config-l! \ | and write it into the Base-Upper32-bits pci-max-mem @ 20 rshift \ | fetch max Limit address and keep upper 32 bits 2 pick 2C + rtas-config-l! \ | and set the Limit THEN \ FI 10 rshift \ keep upper 16 bits pci-max-mem @ 1- FFFF0000 and or \ and Insert mmem Limit (set it to max) swap 24 + rtas-config-l! \ and write it into the bridge ; \ Update pci-next-mem to be 1MB aligned and set the mem-limit register \ The Limit Value is one less then the upper boundary \ If the limit is less than the base the mem is disabled : pci-bridge-set-mem-limit ( addr -- ) pci-next-mem @ 100000 #aligned \ read the current Value and align to 1MB boundary dup pci-next-mem ! \ and write it back 1- \ make limit one less than boundary over 24 + rtas-config-w@ \ check if 64bit support 1 and IF \ IF 64 bit support 2dup 20 rshift \ | keep upper 32 bits swap 2C + rtas-config-l! \ | and write it into the Limit-Upper32-bits THEN \ FI FFFF0000 and \ keep upper 16 bits over 24 + rtas-config-l@ 0000FFFF and \ fetch original Value or swap 24 + rtas-config-l! \ and write it into the bridge ; \ Update pci-next-io to be 4KB aligned and set the io-base and io-base-upper register \ and set the Limit register to the maximum available address space \ needed for scanning possible devices behind the bridge : pci-bridge-set-io-base ( addr -- ) pci-next-io @ 1000 #aligned \ read the current Value and align to 4KB boundary dup 1000 + pci-next-io ! \ and write back with 4K for bridge over 1C + rtas-config-l@ \ check if 32bit support 1 and IF \ IF 32 bit support 2dup 10 rshift \ | keep upper 16 bits pci-max-io @ FFFF0000 and or \ | insert upper 16 bits of Max-Limit swap 30 + rtas-config-l! \ | and write it into the Base-Upper16-bits THEN \ FI 8 rshift 000000FF and \ keep upper 8 bits pci-max-io @ 1- 0000FF00 and or \ insert upper 8 bits of Max-Limit over rtas-config-l@ FFFF0000 and \ fetch original Value or swap 1C + rtas-config-l! \ and write it into the bridge ; \ Update pci-next-io to be 4KB aligned and set the io-limit register \ The Limit Value is one less then the upper boundary \ If the limit is less than the base the io is disabled : pci-bridge-set-io-limit ( addr -- ) pci-next-io @ 1000 #aligned \ read the current Value and align to 4KB boundary dup pci-next-io ! \ and write it back 1- \ make limit one less than boundary over 1D + rtas-config-b@ \ check if 32bit support 1 and IF \ IF 32 bit support 2dup FFFF0000 and \ | keep upper 16 bits over 30 + rtas-config-l@ \ | fetch original Value or swap 30 + rtas-config-l! \ | and write it into the Limit-Upper16-bits THEN \ FI 0000FF00 and \ keep upper 8 bits over 1C + rtas-config-l@ FFFF00FF and \ fetch original Value or swap 1C + rtas-config-l! \ and write it into the bridge ; \ set up all base registers to the current variable Values : pci-bridge-set-bases ( addr -- ) dup pci-bridge-set-mmio-base dup pci-bridge-set-mem-base pci-bridge-set-io-base ; \ set up all limit registers to the current variable Values : pci-bridge-set-limits ( addr -- ) dup pci-bridge-set-mmio-limit dup pci-bridge-set-mem-limit pci-bridge-set-io-limit ; \ ---------------------------------------------------------- \ ****************** PCI Scan functions ****************** \ ---------------------------------------------------------- \ define function pointer as forward declaration of pci-probe-bus DEFER func-pci-probe-bus DEFER func-pci-bridge-range-props \ Setup the Base and Limits in the Bridge \ and scan the bus(es) beyond that Bridge : pci-bridge-probe ( addr -- ) dup pci-bridge-set-bases \ SetUp all Base Registers dup func-pci-bridge-range-props \ Setup temporary "range pci-bus-number 1+ TO pci-bus-number \ increase number of busses found pci-device-vec-len 1+ TO pci-device-vec-len \ increase the device-slot vector depth dup \ stack config-addr for pci-bus! FF swap \ Subordinate Bus Number ( for now to max to open all subbusses ) pci-bus-number swap \ Secondary Bus Number ( the new busnumber ) dup pci-addr2bus swap \ Primary Bus Number ( the current bus ) pci-bus! \ and set them into the bridge pci-enable \ enable mem/IO transactions dup pci-bus-scnd@ func-pci-probe-bus \ and probe the secondary bus dup pci-bus-number swap pci-bus-subo! \ set SubOrdinate Bus Number to current number of busses pci-device-vec-len 1- TO pci-device-vec-len \ decrease the device-slot vector depth dup pci-bridge-set-limits \ SetUp all Limit Registers drop \ forget the config-addr ; \ set up the pci-device : pci-device-setup ( addr -- ) drop \ since the config-addr is coded in my-space, drop it here s" pci-device.fs" included \ and setup the device as node in the device tree ; \ set up the pci bridge : pci-bridge-setup ( addr -- ) drop \ since the config-addr is coded in my-space, drop it here s" pci-bridge.fs" included \ and setup the bridge as node in the device tree ; \ add the new found device/bridge to the device tree and set it up : pci-add-device ( addr -- ) new-device \ create a new device-tree node dup set-space \ set the config addr for this device tree entry dup pci-set-slot \ set the slot bit dup pci-htype@ \ read HEADER-Type 7f and \ Mask bit 7 - multifunction device CASE 0 OF pci-device-setup ENDOF \ | set up the device 1 OF pci-bridge-setup ENDOF \ | set up the bridge dup OF dup pci-htype@ pci-out ENDOF ENDCASE finish-device \ and close the device-tree node ; \ check for multifunction and for each function \ (dependig from header type) call device or bridge setup : pci-setup-device ( addr -- ) dup pci-htype@ \ read HEADER-Type 80 and IF 8 ELSE 1 THEN \ check for multifunction 0 DO \ LOOP over all possible functions (either 8 or only 1) dup i 8 lshift + \ calc device-function-config-addr dup pci-vendor@ \ check if valid function FFFF = IF drop \ non-valid so forget the address ELSE pci-device-number 1+ \ increase the number of devices TO pci-device-number \ and store it pci-add-device \ and add the device to the device tree and set it up THEN LOOP \ next function drop \ forget the device-addr ; \ check if a device is plugged into this bus at this device number : pci-probe-device ( busnr devicenr -- ) pci-bus2addr \ calc pci-address dup pci-vendor@ \ fetch Vendor-ID FFFF = IF \ check if valid drop \ if not forget it ELSE pci-setup-device \ if valid setup the device THEN ; \ walk through all 32 possible pci devices on this bus and probe them : pci-probe-bus ( busnr -- ) 0 TO pci-device-slots \ reset slot array to unpoppulated 20 0 DO dup i pci-probe-device LOOP drop ; \ setup the function pointer used in pci-bridge-setup ' pci-probe-bus TO func-pci-probe-bus \ ---------------------------------------------------------- \ ****************** System functions ******************** \ ---------------------------------------------------------- \ Setup the whole system for pci devices \ start with the bus-min and try all busses \ until at least 1 device was found \ ( needed for HostBridges that don't start with Bus 0 ) : pci-probe-all ( bus-max bus-min -- ) \ Check all busses from bus-min up to bus-max if needed 0 TO pci-device-vec-len \ reset the device-slot vector DO i TO pci-bus-number \ set current Busnumber 0 TO pci-device-number \ reset Device Number pci-bus-number pci-probe-bus \ and probe this bus pci-device-number 0 > IF LEAVE THEN \ if we found a device we're done LOOP \ else next bus ; : (probe-pci-host-bridge) ( bus-max bus-min -- ) 0d emit ." Adapters on " puid 10 0.r cr \ print the puid we're looking at ( bus-max bus-min ) pci-probe-all \ and walk the bus pci-device-number 0= IF \ IF no devices found 15 spaces \ | indent the output ." None" cr \ | tell the world our result THEN \ FI ; \ probe the hostbridge that is specified in my-puid \ for the mmio mem and io addresses: \ base is the least available address \ max is the highest available address : probe-pci-host-bridge ( bus-max bus-min mmio-max mmio-base mem-max mem-base io-max io-base my-puid -- ) puid >r TO puid \ save puid and set the new pci-next-io ! \ save the next io-base address pci-max-io ! \ save the max io-space address pci-next-mem ! \ save the next mem-base address pci-max-mem ! \ save the max mem-space address pci-next-mmio ! \ save the next mmio-base address pci-max-mmio ! \ save the max mmio-space address (probe-pci-host-bridge) r> TO puid \ restore puid ; \ provide the device-alias definition words #include \ provide all words for the interrupts settings #include \ provide all words for the pci capabilities init #include \ provide all words needed to generate the properties and/or assign BAR values #include "pci-properties.fs" \ setup the function pointer for bridge ranges ' pci-bridge-range-props TO func-pci-bridge-range-props