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2007-12-21[POWERPC] cell: wrap master run control bitMasato Noguchi
Add platform specific SPU run control routines to the spufs. The current spufs implementation uses the SPU master run control bit (MFC_SR1[S]) to control SPE execution, but the PS3 hypervisor does not support the use of this feature. This change adds the run control wrapper routies spu_enable_spu() and spu_disable_spu(). The bare metal routines use the master run control bit, and the PS3 specific routines use the priv2 run control register. An outstanding enhancement for the PS3 would be to add a guard to check for incorrect access to the spu problem state when the spu context is disabled. This check could be implemented with a flag added to the spu context that would inhibit mapping problem state pages, and a routine to unmap spu problem state pages. When the spu is enabled with ps3_enable_spu() the flag would be set allowing pages to be mapped, and when the spu is disabled with ps3_disable_spu() the flag would be cleared and mapped problem state pages would be unmapped. Signed-off-by: Masato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-21[POWERPC] Optimize counting distinct entries in the relocation sectionsEmil Medve
When a module has relocation sections with tens of thousands of entries, counting the distinct/unique entries only (i.e. no duplicates) at load time can take tens of seconds and up to minutes. The sore point is the count_relocs() function which is called as part of the architecture specific module loading processing path: -> load_module() generic -> module_frob_arch_sections() arch specific -> get_plt_size() 32-bit -> get_stubs_size() 64-bit -> count_relocs() Here count_relocs is being called to find out how many distinct targets of R_PPC_REL24 relocations there are, since each distinct target needs a PLT entry or a stub created for it. The previous counting algorithm has O(n^2) complexity. Basically two solutions were proposed on the e-mail list: a hash based approach and a sort based approach. The hash based approach is the fastest (O(n)) but the has it needs additional memory and for certain corner cases it could take lots of memory due to the degeneration of the hash. One such proposal was submitted here: http://ozlabs.org/pipermail/linuxppc-dev/2007-June/037641.html The sort based approach is slower (O(n * log n + n)) but if the sorting is done "in place" it doesn't need additional memory. This has O(n + n * log n) complexity with no additional memory requirements. This commit implements the in-place sort option. Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] cell/cbe_regs.c: Add missing of_node_putJulia Lawall
There should be an of_node_put when breaking out of a loop that iterates using for_each_node_by_type. This was detected and fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ identifier d; type T; expression e; iterator for_each_node_by_type; @@ T *d; ... for_each_node_by_type(d,...) {... when != of_node_put(d) when != e = d ( return d; | + of_node_put(d); ? return ...; ) ...} // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Christian Krafft <krafft@de.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Erb <djerb@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] arch/powerpc: Add missing of_node_putJulia Lawall
There should be an of_node_put when breaking out of a loop that iterates over calls to of_find_all_nodes, as this function does an of_node_get on the value it returns. This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T; identifier d; expression e; @@ T *d; ... for (d = NULL; (d = of_find_all_nodes(d)) != NULL; ) {... when != of_node_put(d) when != e = d ( return d; | + of_node_put(d); ? return ...; ) ...} // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] arch/ppc: Remove an unnecessary pci_dev_putJulia Lawall
Remove an unnecessary pci_dev_put. pci_dev_put is called implicitly by the subsequent call to pci_get_device. The problem was detected using the following semantic patch, and corrected by hand. @@ expression dev; expression E; @@ - pci_dev_put(dev) ... when != dev = E - pci_get_device(...,dev) Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] arch/ppc: Remove duplicate includesLucas Woods
Signed-off-by: Lucas Woods <woodzy@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] arch/powerpc: Remove duplicate includesLucas Woods
Signed-off-by: Lucas Woods <woodzy@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Don't cast a struct pointer to list_head pointerLi Zefan
The casting is safe only when the list_head member is the first member of the structure, and even then it is better to use the address of the list_head structure member. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] CHRP: Fix possible NULL pointer dereferenceCyrill Gorcunov
This fixes a possible NULL pointer dereference inside of strncmp() if of_get_property() fails. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Stop the TOC overflowing for large buildsStephen Rothwell
We were using -mno-minimal-toc on everything in arch/powerpc/kernel, which means that all the functions in there were putting all their TOC entries in the top-level TOC, and it was overflowing on an allyesconfig build. For various reasons, prom_init.c does need -mno-minimal-toc, but the other .c files in there can use sub-TOCs quite happily. This change is sufficient for now to stop the TOC overflowing; other directories under arch/powerpc also use -mno-minimal-toc and could also be changed later if necessary. Lmbench runs with and without this patch showed no significant speed differences. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Fix PCI IRQ fallback code to not map IRQ 0Benjamin Herrenschmidt
The PCI IRQ code has a fallback when the device-tree parsing fails, that tries to map the interrupt indicated by PCI_INTERRUPT_LINE if the firmware set something in there. This is a bit fragile but has proven useful in some cases so far. However, it's causing us to incorrectly try to map interrupt 0 on various setups, so let's prevent that case, as none of the cases where the fallback is legit should have an IRQ 0. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Disable PCI IO/Mem on a device when resources can't be allocatedBenjamin Herrenschmidt
This patch changes the PowerPC PCI code to disable IO and/or Memory decoding on a PCI device when a resource of that type failed to be allocated. This is done to avoid having unallocated dangling BARs enabled that might try to decode on top of other devices. If a proper resource is assigned later on, then pci_enable_device() will take care of re-enabling decoding. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Fixup skipping of PowerMac PCI<->PCI bridge "closed" resourcesBenjamin Herrenschmidt
Apple firmware has a strange way to "close" bridge resources by setting them to some bogus values that overlap RAM (strangely, I haven't seen it conflicting with DMA so far...). This explicitely closes them to avoid problems. Previously, they would be closed as a consequence of failing to be allocated, but this makes it more explicit, and thus the log message is more explicit too. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Improve resource setup of PowerMac G5 HT bridgeBenjamin Herrenschmidt
The device node for the HT bridge on G5s doesn't contain useful ranges. We used to give it a bunch of the known PCI space and then punch a "hole" in it based on where the AGP or PCIe region was. This reworks it to use the actual register in the bridge that controls the decoding instead. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Enable self-view of the HT host bridge on PowerMac G5Benjamin Herrenschmidt
This enables the PCI code to see the device that represents the HT host bridge on the PowerMac G5. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Various fixes to pcibios_enable_device()Benjamin Herrenschmidt
Our implementation of pcibios_enable_device() has a couple of problems. One is that it should not check IORESOURCE_UNSET, as this might be left dangling after resource assignment (shouldn't but there are bugs), but instead, we make it check resource->parent which should be a reliable indication that the resource has been successfully claimed (it's in the resource tree). Then, we also need to skip ROM resources that haven't been enabled as x86 does. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Clear pci_probe_only on 64 bits PowerMacBenjamin Herrenschmidt
It should now be safe to re-assign unassigned resources on 64 bits PowerMac machines (G5s). This clears pci_probe_only on those. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Fixup powermac enable device hookBenjamin Herrenschmidt
Powermac's use of the pcibios_enable_device_hook() got slightly broken by the recent PCI merge in that it won't be called for the "initial" case of assigning resources to a previously unassigned device. This was an abuse of that hook anyway, so instead we now use a header quirk. While at it, we move a #ifdef CONFIG_PPC32 to enclose more code that is only ever used on 32 bits. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Merge 32 and 64 bits pcibios_enable_deviceBenjamin Herrenschmidt
This merge the two implementations, based on the previously fixed up 32 bits one. The pcibios_enable_device_hook in ppc_md is now available for ppc64 use. Also remove the new unused "initial" parameter from it and fixup users. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Updates/fixes to 32 bits pcibios_enable_device()Benjamin Herrenschmidt
Our implementation of pcibios_enable_device() incorrectly ignores the mask argument and always checks that all resources have been allocated, which isn't the right thing to do anymore. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] fix iSeries PCI resource managementBenjamin Herrenschmidt
The way iSeries manages PCI IO and Memory resources is a bit strange and is based on overriding the content of those resources with home cooked ones afterward. This changes it a bit to better integrate with the new resource handling so that the "virtual" tokens that iSeries replaces resources with are done from the proper per-device fixup hook, and bridge resources are set to enclose that token space. This fixes various things such as the output of /proc/iomem & ioports, among others. This also fixes up various boot messages as well. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Merge PCI resource allocation & assignmentBenjamin Herrenschmidt
The 32 bits PCI code now uses the generic code for assigning unassigned resources and an algorithm similar to x86 for claiming existing ones. This works far better than the 64 bits code which basically can only claim existing ones (pci_probe_only=1) or would fall apart completely. This merges them so that the new 32 bits implementation is used for both. 64 bits now gets the new PCI flags for controlling the behaviour, though the old pci_probe_only global is still there for now to be cleared if you want to. I kept a pcibios_claim_one_bus() function mostly based on the old 64 bits code for use by the DLPAR hotplug. This will have to be cleaned up, thought I hope it will work in the meantime. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Merge PCI resource fixupsBenjamin Herrenschmidt
The PCI code in 32 and 64 bits fixes up resources differently. 32 bits uses a header quirk plus handles bridges in pcibios_fixup_bus() while 64 bits does things in various places depending on whether you are using OF probing, using PCI hotplug, etc... This merges those by basically using the 32 bits approach for both, with various tweaks to make 64 bits work with the new approach. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Merge pcibios_resource_to_bus/bus_to_resourceBenjamin Herrenschmidt
This merges the PowerPC 32 and 64 bits version of pcibios_resource_to_bus and pcibios_bus_to_resource(). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pci32: Add platform option to enable /proc PCI domainsBenjamin Herrenschmidt
This adds flags the platforms can use to enable domain numbers in /proc/bus/pci. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pci32: Remove obsolete PowerMac bus number hackBenjamin Herrenschmidt
The 32 bits PCI code carries an old hack that was only useful for G5 machines. Nowdays, the 32 bits kernel doesn't support any of those machines anymore so the hack is basically never used, so remove it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pci32: Add flags modifying the PCI code behaviourBenjamin Herrenschmidt
This adds to the 32 bits PCI code some flags, replacing the old pci_assign_all_busses global, that allow us to control various aspects of the PCI probing, such as whether to re-assign all resources or not, or to not try to assign anything at all. This also adds the flag x86 already has to avoid ISA alignment on bridges that don't have ISA forwarding enabled (no legacy devices on the top level bus) and sets it for PowerMacs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pci32: Remove PowerMac P2P bridge IO hackBenjamin Herrenschmidt
The 32 bits PowerPC PCI code has a hack for use by some PowerMacs to try to re-open PCI<->PCI bridge IO resources that were closed by the firmware. This is no longer necessary as the generic code will now do that for us. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pci32: Use generic pci_assign_unassign_resourcesBenjamin Herrenschmidt
This makes the 32 bits PowerPC PCI code use the generic code to assign resources to devices that had unassigned or conflicting resources. This allow us to remove the local implementation that was incomplete and could not assign for example a PCI<->PCI bridge from scratch, which is needed on various embedded platforms. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pci32: Remove bogus alignment messageBenjamin Herrenschmidt
There's a stale & bogus piece of code in 32 bits PCI code that complains about ISA related alignment issues. Just remove it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Use embedded dtc in kernel buildsDavid Gibson
This patch alters the kernel makefiles to build dtc from the sources embedded in the previous patch. It also changes the arch/powerpc/boot/wrapper script to use the embedded dtc, rather than expecting a copy of dtc already installed on the system. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Merge dtc upstream sourceDavid Gibson
This incorporates a copy of dtc into the kernel source, in arch/powerpc/boot/dtc-src. This commit only imports the upstream sources verbatim, a later commit will actually link it into the kernel Makefiles and use the embedded code during the kernel build. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] holly.c: Remove unnecessary include of linux/ide.hOlof Johansson
There's nothing in holly.c that needs linux/ide.h, just remove it from the list of includes. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] arch/ppc/: Spelling fixesjoe@perches.com
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] arch/powerpc/: Spelling fixesjoe@perches.com
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Implement pci_set_dma_mask() in terms of the dma_opsMichael Ellerman
PowerPC currently doesn't implement pci_set_dma_mask(), which means drivers calling it will get the generic version in drivers/pci/pci.c. The powerpc dma mapping ops include a dma_set_mask() hook, which luckily is not implemented by anyone - so there is no bug in the fact that the hook is currently never called. However in future we'll add implementation(s) of dma_set_mask(), and so we need pci_set_dma_mask() to call the hook. To save adding a hook to the dma mapping ops, pci-set_consistent_dma_mask() simply calls the dma_set_mask() hook and then copies the new mask into dev.coherenet_dma_mask. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Optimize account_system_vtimeMilton Miller
We have multiple calls to has_feature being inlined, but gcc can't be sure that the store via get_paca() doesn't alias the path to cur_cpu_spec->feature. Reorder to put the calls to read_purr and read_spurr adjacent to each other. To add a sense of consistency, reorder the remaining lines to perform parallel steps on purr and scaled purr of each line instead of calculating and then using one value before going on to the next. In addition, we can tell gcc that no SPURR means no PURR. The test is completely hidden in the PURR case, and in the !PURR case the second test is eliminated resulting in the simple register copy in the out-of-line branch. Further, gcc sees get_paca()->system_time referenced several times and allocates a register to address it (shadowing r13) instead of caching its value. Reading into a local varable saves the shadow of r13 and removes a potentially duplicate load (between the nested if and its parent). Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Depend on ->initialized in calc_steal_timeMilton Miller
If CPU_FTR_PURR is not set, we will never set cpu_purr_data->initialized. Checking via __get_cpu_var on 64 bit avoids one dependent load compared to cpu_has_feature in the not-present case, and is always required when it is present. The code is under CONFIG_VIRT_CPU_ACCOUNTING so 32 bit will not be affected. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Timer interrupt: use a struct for two per_cpu varablesMilton Miller
timer_interrupt() was calculating per_cpu_offset several times, having to start from the toc because of potential aliasing issues. Placing both decrementer per_cpu varables in a struct and calculating the address once with __get_cpu_var results in better code on both 32 and 64 bit. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Use __get_cpu_var in time.cMilton Miller
Use __get_cpu_var(x) instead of per_cpu(x, smp_processor_id()), as it is optimized on ppc64 to access the current cpu's per-cpu offset directly; it's local_paca.offset instead of TOC->paca[local_paca->processor_id].offset. This is the trivial portion, two functions with one use each. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] init_decrementer_clockevent can be static __initMilton Miller
as its only called from time_init, which is __init. Also remove unneeded forward declaration. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Push down or eliminate smp_processor_id calls in xics codeMilton Miller
The per-processor interrupt request register and current processor priority register are only accessed on the current cpu. In fact the hypervisor doesn't even let us choose which cpu's registers to access. The only function to use cpu twice is xics_migrate_irqs_away, not a fast path. But we can cache the result of get_hard_processor_id() instead of calling get_hard_smp_processor_id(cpu) in a loop across the call to rtas. Years ago the irq code passed smp_processor_id into get_irq, I thought we might initialize the CPPR third party at boot as an extra measure of saftey, and it made the code symmetric with the qirr (queued interrupt for software generated interrupts), but now it is just extra and sometimes unneeded work to pass it down. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] celleb: Split machine definitionIshizaki Kou
This splits the machine definition for celleb into two definitions, one for celleb_beat, and the other for celleb_native. Though this looks complex because of sorting some functions, there are no more semantic changes than that for the splitting. Signed-off-by: Kou Ishizaki <Kou.Ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Cleanup calling mmio_nvram_initIshizaki Kou
This makes mmio_nvram_init() callable unconditionally by providing a dummy definition when CONFIG_MMIO_NVRAM is not defined. Signed-off-by: Kou Ishizaki <Kou.Ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] pasemi: Implement MSI supportOlof Johansson
Implement MSI support for PA Semi PWRficient platforms. MSI is done through a special range of sources on the openpic controller, and they're unfortunately breaking the usual concepts of how sources are programmed: * The source is calculated as 512 + the value written into the MSI register * The vector for this source is added to the source and reported through IACK This means that for simplicity, it makes much more sense to just set the vector to 0 for the source, since that's really the vector we expect to see from IACK. Also, the affinity/priority registers will affect 16 sources at a time. To avoid most (simple) users from being limited by this, allocate 16 sources per device but use only one. This means that there's a total of 32 sources. If we get usage scenarions that need more sources, the allocator should probably be revised to take an alignment argument and size, not just do natural alignment. Finally, since I'm already touching the MPIC names on pasemi, rename the base one from the somewhat odd " PAS-OPIC " to "PASEMI-OPIC". Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] iSeries: Fix unregistering HV event handlersStephen Rothwell
Commit fbd568a3e61a7decb8a754ad952aaa5b5c82e9e5 ("Change synchronize_kernel to _rcu and _sched") changed the deprecated synchronize_kernel() in HvLpEvent_unregisterHandler() to synchronize_rcu(). It turns out that it should have been synchronize_sched(). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] wrapper: Treat NULL as root node in devp_offset; add ↵Scott Wood
devp_offset_find() Many operations, as currently used in the wrapper, assume they can pass NULL and have it be treated as the root node. However, libfdt-wrapper converts NULL to -1, which is only appropriate when searching for nodes, and will cause an error otherwise. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] wrapper: Rename offset in offset_devp()Scott Wood
fdt_wrapper_create_node passes a variable called offset to offset_devp(), which uses said parameter to initialize a local variable called offset. Due to one of the odder aspects of the C language, the result is an undefined variable, with no error or warning. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] Fake NUMA emulation for PowerPCBalbir Singh
Here's a dumb simple implementation of fake NUMA nodes for PowerPC. Fake NUMA nodes can be specified using the following command line option numa=fake=<node range> node range is of the format <range1>,<range2>,...<rangeN> Each of the rangeX parameters is passed using memparse(). I find this useful for fake NUMA emulation on my simple PowerPC machine. I've tested it on a non-numa box with the following arguments: numa=fake=1G numa=fake=1G,2G name=fake=1G,512M,2G numa=fake=1500M,2800M mem=3500M numa=fake=1G mem=512M numa=fake=1G mem=1G Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-20[POWERPC] MPIC: Minor optimization of ipi handlerOlof Johansson
Optimize MPIC IPIs, by passing in the IPI number as the argument to the handler, since all we did was translate it back based on which mpic the interrupt came though on (and that was always the primary mpic). Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>