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* powerpc: Change archdata dma_data to a unionBecky Bruce2009-09-241-4/+4
| | | | | | | | | | Sometimes this is used to hold a simple offset, and sometimes it is used to hold a pointer. This patch changes it to a union containing void * and dma_addr_t. get/set accessors are also provided, because it was getting a bit ugly to get to the actual data. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Fix warnings when printing resource_size_tStephen Rothwell2009-06-091-2/+2
| | | | | | | | | | | | | resource_size_t is 64 bits on pseries Gets rid of these warnings: arch/powerpc/platforms/pseries/iommu.c: In function 'pci_dma_bus_setup_pSeries': arch/powerpc/platforms/pseries/iommu.c:391: warning: format '%lx' expects type 'long unsigned int', but argument 2 has type 'resource_size_t' arch/powerpc/platforms/pseries/iommu.c:417: warning: format '%lx' expects type 'long unsigned int', but argument 2 has type 'resource_size_t' Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Change u64/s64 to a long long integer typeIngo Molnar2009-01-131-18/+17
| | | | | | | | | | | | | | | | | | | | | | Convert arch/powerpc/ over to long long based u64: -#ifdef __powerpc64__ -# include <asm-generic/int-l64.h> -#else -# include <asm-generic/int-ll64.h> -#endif +#include <asm-generic/int-ll64.h> This will avoid reoccuring spurious warnings in core kernel code that comes when people test on their own hardware. (i.e. x86 in ~98% of the cases) This is what x86 uses and it generally helps keep 64-bit code 32-bit clean too. [Adjusted to not impact user mode (from paulus) - sfr] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Use is_kdump_kernel()Milton Miller2008-10-311-2/+2
| | | | | | | | | | | | linux/crash_dump.h defines is_kdump_kernel() to be used by code that needs to know if the previous kernel crashed instead of a (clean) boot or reboot. This updates the just added powerpc code to use it. This is needed for the next commit, which will remove __kdump_flag. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Support for relocatable kdump kernelMohan Kumar M2008-10-221-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | This adds relocatable kernel support for kdump. With this one can use the same regular kernel to capture the kdump. A signature (0xfeed1234) is passed in r6 from panic code to the next kernel through kexec_sequence and purgatory code. The signature is used to differentiate between kdump kernel and non-kdump kernels. The purgatory code compares the signature and sets the __kdump_flag in head_64.S. During the boot up, kernel code checks __kdump_flag and if it is set, the kernel will behave as relocatable kdump kernel. This kernel will boot at the address where it was loaded by kexec-tools ie. at the address reserved through crashkernel boot parameter. CONFIG_CRASH_DUMP depends on CONFIG_RELOCATABLE option to build kdump kernel as relocatable. So the same kernel can be used as production and kdump kernel. This patch incorporates the changes suggested by Paul Mackerras to avoid GOT use and to avoid two copies of the code. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Mohan Kumar M <mohan@in.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: iommu enablement for CMORobert Jennings2008-07-251-10/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | To support Cooperative Memory Overcommitment (CMO), we need to check for failure from some of the tce hcalls. These changes for the pseries platform affect the powerpc architecture; patches for the other affected platforms are included in this patch. pSeries platform IOMMU code changes: * platform TCE functions must handle H_NOT_ENOUGH_RESOURCES errors and return an error. Architecture IOMMU code changes: * Calls to ppc_md.tce_build need to check return values and return DMA_MAPPING_ERROR for transient errors. Architecture changes: * struct machdep_calls for tce_build*_pSeriesLP functions need to change to indicate failure. * all other platforms will need updates to iommu functions to match the new calling semantics; they will return 0 on success. The other platforms default configs have been built, but no further testing was performed. Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/dma: Use the struct dma_attrs in iommu codeMark Nelson2008-07-221-5/+9
| | | | | | | | | | Update iommu_alloc() to take the struct dma_attrs and pass them on to tce_build(). This change propagates down to the tce_build functions of all the platforms. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* [POWERPC] Fix sparse warnings in arch/powerpc/platforms/pseriesMichael Ellerman2008-05-141-6/+9
| | | | | | | | | | | Don't return void in pseries/iommu.c Make mce_data_buf static in pseries/ras.c Make things static in pseries/rtasd.c Make things static in pseries/setup.c vtermno may as well be static in platforms/pseries/lpar.c Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Convert from DBG() to pr_debug() in platforms/pseries/Michael Ellerman2008-04-241-20/+19
| | | | | | | | | | | | | | | In pseries/lpar.c, fix some printf specifier mismatches, and add a newline to one printk. In pseries/rtasd.c add "rtasd" to some messages to make it clear where they're coming from. In pseries/scanlog.c remove the hand-rolled runtime debugging support in there. This file has been largely unchanged for eons, if we need to debug it in future we can recompile. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pci_controller->arch_data really is a struct device_node *Stephen Rothwell2007-12-111-1/+1
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pSeries: Remove dependency on pci_dn bussubnoStephen Rothwell2007-12-111-17/+7
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] iommu_free_table doesn't need the device_nodeStephen Rothwell2007-12-111-1/+1
| | | | | | | | | It only needs the iommu_table address. It also makes use of the node name to print error messages. So just pass it the things it needs. This reduces the places that know about the pci_dn by one. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Minor pSeries IOMMU debug cleanupMichael Neuling2007-05-101-1/+2
| | | | | | | | pci is not initialized before being used here, so this debug print is bogus at the current location. Move it to where it makes sense. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pseries: Handle null iommu dma-window property correctlyLinas Vepstas2007-05-021-0/+6
| | | | | | | | | | | | | | | | Some versions of pSeries firmware fail to set up a dma-window property for PCI slots that are unoccupied. As a result, the loop searching for this propery, in pci_dma_dev_setup_pSeriesLP(), can run to the end, resulting in a NULL pointer dereference later in the routine. This patch prevents the crash, and prints a warning message. This is theoretically a rare error, as it occurs on what is hopefully just beta levels of firmware. But just in case this firmware escapes into the wild, this patch will avoid the crash. Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
* [POWERPC] Rename get_property to of_get_property: arch/powerpcStephen Rothwell2007-04-131-6/+6
| | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Allow pSeries to build without CONFIG_PCIStephen Rothwell2007-03-091-23/+30
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Create and use set_pci_dma_opsStephen Rothwell2007-03-091-2/+2
| | | | | | | This will allow us to build without PCI easier. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fix broken DMA on non-LPAR pSeriesLinas Vepstas2007-01-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It appears that the iommu table address is never stored, and thus never found, on non-lpar systems. Thus, for example, during boot: <7>[ 93.067916] PCI: Scanning bus 0001:41 <7>[ 93.068542] PCI: Found 0001:41:01.0 [8086/100f] 000200 00 <7>[ 93.068550] PCI: Calling quirk c0000000007822e0 for 0001:41:01.0 <7>[ 93.069815] PCI: Fixups for bus 0001:41 <4>[ 93.070167] iommu: Device 0001:41:01.0 has no iommu table <7>[ 93.070251] PCI: Bus scan for 0001:41 returning with max=41 No iommu table? How can that be? Well, circa line 471 of arch/powerpc/platforms/pseries/iommu.c we see the code: while (dn && PCI_DN(dn) && PCI_DN(dn)->iommu_table == NULL) dn = dn->parent; and a few lines later is the surprising print statement about the missing table. Seems that this loop ran unto the end, never once finding a non-null PCI_DN(dn)->iommu_table. The problem can be found a few lines earlier: it sems that the value of PCI_DN(dn)->iommu_table is never ever set. Thus, the patch sets it. The patch was tested on a Power4 system running in full system partition mode, which is where I saw the problem. It works; I've not done any wider testing. Had a brief discussion on this on irc. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Refactor 64 bits DMA operationsBenjamin Herrenschmidt2006-12-041-44/+46
| | | | | | | | | | | | | | | | | This patch completely refactors DMA operations for 64 bits powerpc. 32 bits is untouched for now. We use the new dev_archdata structure to add the dma operations pointer and associated data to struct device. While at it, we also add the OF node pointer and numa node. In the future, we might want to look into merging that with pci_dn as well. The old vio, pci-iommu and pci-direct DMA ops are gone. They are now replaced by a set of generic iommu and direct DMA ops (non PCI specific) that can be used by bus types. The toplevel implementation is now inline. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Use 4kB iommu pages even on 64kB-page systemsLinas Vepstas2006-11-011-27/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 10Gigabit ethernet device drivers appear to be able to chew up all 256MB of TCE mappings on pSeries systems, as evidenced by numerous error messages: iommu_alloc failed, tbl c0000000010d5c48 vaddr c0000000d875eff0 npages 1 Some experimentation indicates that this is essentially because one 1500 byte ethernet MTU gets mapped as a 64K DMA region when the large 64K pages are enabled. Thus, it doesn't take much to exhaust all of the available DMA mappings for a high-speed card. This patch changes the iommu allocator to work with its own unique, distinct page size. Although the patch is long, its actually quite simple: it just #defines a distinct IOMMU_PAGE_SIZE and then uses this in all the places that matter. As a side effect, it also dramatically improves network performance on platforms with H-calls on iommu translation inserts/removes (since we no longer call it 16 times for a 1500 bytes packet when the iommu HW is still 4k). In the future, we might want to make the IOMMU_PAGE_SIZE a variable in the iommu_table instance, thus allowing support for different HW page sizes in the iommu itself. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] linux,tce-size property is 32 bitsNathan Lynch2006-10-061-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "linux,tce-size" property is only 32 bits (see prom_initialize_tce_table() in arch/powerpc/kernel/prom_init.c). Treating it as an unsigned long in iommu_table_setparms() leads to access beyond the end of the property's buffer, so we pass garbage to the memset() in that function. [boot]0020 XICS Init i8259 legacy interrupt controller initialized [boot]0021 XICS Done PID hash table entries: 4096 (order: 12, 32768 bytes) cpu 0x0: Vector: 300 (Data Access) at [c0000000fe783850] pc: c000000000035e90: .memset+0x60/0xfc lr: c000000000044fa4: .iommu_table_setparms+0xb0/0x158 sp: c0000000fe783ad0 msr: 9000000000009032 dar: c000000100000000 dsisr: 42010000 current = 0xc00000000450e810 paca = 0xc000000000411580 pid = 1, comm = swapper enter ? for help [link register ] c000000000044fa4 .iommu_table_setparms+0xb0/0x158 [c0000000fe783ad0] c000000000044f4c .iommu_table_setparms+0x58/0x158 (unreliable) [c0000000fe783b70] c00000000004529c .iommu_bus_setup_pSeries+0x1c4/0x254 [c0000000fe783c00] c00000000002b8ac .do_bus_setup+0x3c/0xe4 [c0000000fe783c80] c00000000002c924 .pcibios_fixup_bus+0x64/0xd8 [c0000000fe783d00] c0000000001a2d5c .pci_scan_child_bus+0x6c/0x10c [c0000000fe783da0] c00000000002be28 .scan_phb+0x17c/0x1b4 [c0000000fe783e40] c0000000003cfa00 .pcibios_init+0x58/0x19c [c0000000fe783ec0] c0000000000094b4 .init+0x1e8/0x3d8 [c0000000fe783f90] c000000000026e54 .kernel_thread+0x4c/0x68 Signed-off-by: Nathan Lynch <ntl@pobox.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pseries: Constify & voidify get_property()Jeremy Kerr2006-07-311-7/+6
| | | | | | | | | | | | | Now that get_property() returns a void *, there's no need to cast its return value. Also, treat the return value as const, so we can constify get_property later. pseries platform changes. Built for pseries_defconfig Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [POWERPC] kdump: Reserve the existing TCE mappings left by the first kernelHaren Myneni2006-06-281-0/+33
| | | | | | | | | | | | | | | | | | | | | | During kdump boot, noticed some machines checkstop on dma protection fault for ongoing DMA left in the first kernel. Instead of initializing TCE entries in iommu_init() for the kdump boot, this patch fixes this issue by walking through the each TCE table and checks whether the entries are in use by the first kernel. If so, reserve those entries by setting the corresponding bit in tbl->it_map such that these entries will not be available for the kdump boot. However it could be possible that all TCE entries might be used up due to the driver bug that does continuous mapping. My observation is around 1700 TCE entries are used on some systems (Ex: P4) at some point of time during kdump boot and saving dump (either write into the disk or sending to remote machine). Hence, this patch will make sure that minimum of 2048 entries will be available such that kdump boot could be successful in some cases. Signed-off-by: Haren Myneni <haren@us.ibm.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Dont look for class-code in pci childrenAnton Blanchard2006-06-211-6/+2
| | | | | | | | | Looking for class-code in PCI children breaks with direct slots. Lets just count all children. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] node local IOMMU tablesAnton Blanchard2006-06-151-10/+13
| | | | | | | | Allocate IOMMU tables local to the relevant node. Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: pseries: Use generic dma-window parsing functionJeremy Kerr2006-05-191-19/+10
| | | | | | | | | | | | | | Change the pseries iommu init code to use the new of_parse_dma_window() to parse the ibm,dma-window and ibm,my-dma-window properties of pci and virtual device nodes. Also, clean up vio_build_iommu_table() a little. Tested on pseries, with both vio and pci devices. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: kill union tce_entryOlof Johansson2006-04-291-70/+52
| | | | | | | | | | | | | It's been long overdue to kill the union tce_entry in the pSeries/iSeries TCE code, especially since I asked the Summit guys to do it on the code they copied from us. Also, while I was at it, I cleaned up some whitespace. Built and booted on pSeries, built on iSeries. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Replace platform_is_lpar() with a firmware featureMichael Ellerman2006-03-221-1/+1
| | | | | | | | | | | | It has been decreed that platform numbers are evil, so as a step in that direction, replace platform_is_lpar() with a FW_FEATURE_LPAR bit. Currently FW_FEATURE_LPAR really means i/pSeries LPAR, in the future we might have to clean that up if we need to be more specific about what LPAR actually means. But that's another patch ... Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: trivial: modify comments to refer to new location of filesJon Mason2006-02-101-2/+0
| | | | | | | | | This patch removes all self references and fixes references to files in the now defunct arch/ppc64 tree. I think this accomplises everything wanted, though there might be a few references I missed. Signed-off-by: Jon Mason <jdmason@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: pseries namespace cleanupArnd Bergmann2006-01-121-2/+0
| | | | | | | | These symbols are only used in the file that they are defined in, so they should not be in the global namespace. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: minor cleanup of void ptr dereflinas2006-01-091-6/+6
| | | | | | | | Minor: use macro to perform void pointer deref; this may someday help avoid pointer typecasting errors. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc/pseries: Optimize IOMMU setupPaul Mackerras2005-12-051-1/+1
| | | | | | | | | | The previous commit will use the page-at-a-time hypervisor call for setting up IOMMU entries when we are using 64k pages and setting up one 64k page, even though that means 16 calls to the hypervisor, since the hypervisor still works on 4k pages. This optimizes this case by using the multi-page IOMMU setup hypervisor call instead. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc/pseries: Fix TCE building with 64k pagesizeMichal Ostrowski2005-12-021-3/+6
| | | | | | | | | | Must adjust tcenum and npages by TCE_PAGE_FACTOR to convert between 64KB pages and TCE (4K) pages. (This is done in other places, except for this one location.) Signed-off-by: Michal Ostrowski <mostrows at watson ibm com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: update my email addressOlof Johansson2005-11-231-1/+1
| | | | | | | | Email address update, changing old work address to personal (permanent) one. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: merge code values for identifying platformsPaul Mackerras2005-11-101-2/+1
| | | | | | | | | | | | This patch merges platform codes. systemcfg->platform is no longer used, systemcfg use in general is deprecated as much as possible (and renamed _systemcfg before it gets completely moved elsewhere in a future patch), _machine is now used on ppc64 along as ppc32. Platform codes aren't gone yet but we are getting a step closer. A bunch of asm code in head[_64].S is also turned into C code. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Various UP build fixesPaul Mackerras2005-11-071-0/+1
| | | | | | | | | Mostly this involves adding #include <asm/smp.h>, since that defines things like boot_cpuid[_phys] and [gs]et_hard_smp_processor_id, which are SMP-related but still needed on UP. This incorporates fixes posted by Olof Johansson and Heikki Lindholm. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Kill ppcdebugDavid Gibson2005-11-071-1/+0
| | | | | | | | | | | | | | | | The ancient ppcdebug/PPCDBG mechanism is now only used in two places. First, in the hash setup code, one of the bits allows the size of the hash table to be reduced by a factor of 8 - which would be better accomplished with a command line option for that purpose. The other was a bunch of bus walking related messages in the iSeries code, which would seem to be insufficient reason to keep the mechanism. This patch removes the last traces of this mechanism. Built and booted on iSeries and pSeries POWER5 LPAR (ARCH=powerpc). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge with PaulusMichael Ellerman2005-11-041-1/+1
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| * [PATCH] ppc64: Fix add notifier crashesJohn Rose2005-11-031-1/+1
| | | | | | | | | | | | | | | | | | The extraction of PCI stuff from struct device_node left some false assumptions in notifier code. As a result, dynamic add crashes when non-PCI nodes are added. This patch fixes these assumptions. Signed-off-by: John Rose <johnrose@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | powerpc: Move plpar_wrappers.h into arch/powerpc/platforms/pseriesMichael Ellerman2005-11-031-1/+2
|/ | | | | | | Move plpar_wrappers.h into arch/powerpc/platforms/pseries, fixup white space, and update callers. Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
* powerpc: move pSeries files to arch/powerpc/platforms/pseriesPaul Mackerras2005-10-101-0/+606
Signed-off-by: Paul Mackerras <paulus@samba.org>
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