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* [POWERPC] Add tsi108_pci.h for common PCI functionsJosh Boyer2007-05-07
| | | | | | | | Add a header file for the common PCI routines used for the TSI bridge Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] mpc52xx suspend to deep-sleepDomen Puncer2007-05-07
| | | | | | | | | | | | | | | Implement deep-sleep on MPC52xx. SDRAM is put into self-refresh with help of SRAM code (alternatives would be code in FLASH, I-cache). Interrupt code must also not be in SDRAM, so put it in I-cache. MPC52xx core is static, so contents will remain intact even with clocks turned off. Signed-off-by: Domen Puncer <domen.puncer@telargo.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Export of_device_get_modaliasSylvain Munaut2007-05-07
| | | | | | | | | | | Apparently other parts of the kernel need to know the modalias internally (like the sysfs code in macintosh driver). To avoid consistency issues, we export this code and use it everywhere it's needed rather than repeat it ... Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Kill off the PTE_FMT macroDavid Gibson2007-05-07
| | | | | | | | | | | 32-bit powerpc uses a PTE_FMT macro to handle printk() formatting of PTE entries (which can vary in type and size). Apparently there was a good reason for it once, but with current compilers it's simpler just to workaround the variation with a cast in the printk() itself (there's only one use). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] DART iommu suspendJohannes Berg2007-05-07
| | | | | | | | | | This implements save and restore hooks for IOMMUs and implements it the DART iommu. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] powermac: Support G5 CPU hotplugJohannes Berg2007-05-07
| | | | | | | | | | | | This allows "hotplugging" of CPUs on G5 machines. CPUs that are disabled are put into an idle loop with the decrementer frequency set to minimum. To wake them up again we kick them just like when bringing them up. To stop those CPUs from messing with any global state we stop them from entering the timer interrupt. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] MPIC sys_device & suspend/resumeJohannes Berg2007-05-07
| | | | | | | | | | This adds mpic to the system devices and implements suspend and resume for them. This is necessary to get interrupts for modules back to where they were before a suspend to disk. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Minor fault path optimizationChristoph Hellwig2007-05-02
| | | | | | | | Call the kprobes pagefault handler directly instead of going through the complex notifier chain. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Transparently handle <.symbol> lookup for kprobesSrinivasa Ds2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | When data symbols are not present in kernel image, user needs to add dot(".") before function name explicitly, that he wants to probe in kprobe module on ppc64. for ex:- When data symbols are missing on ppc64, ==================== [root@llm27lp1 ~]# cat /proc/kallsyms | grep do_fork c00000000006283c T .do_fork ============================== User needs add "." to "do_fork" kp.symbol_name = ".do_fork"; ============================ This makes kprobe modules unportable. This fixes the problem. Signed-off-by: Srinivasa Ds <srinivasa@in.ibm.com> Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] PS3: Interrupt routine fixups.Geoff Levand2007-05-02
| | | | | | | | Fixups for the ps3 interrupt routines to support all HV device in a generic way. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fix suspend states againJohannes Berg2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit 0fba3a1f39f8b0a50b56c8b068fa52131cbc84c2 (a very long time ago, May 2006), I fixed a bug that caused powermacs to crash when you tried entering standby/mem suspend states. As I'm now getting more familiar with the suspend code I notice a few more things: 1. we previously misunderstood what pm_ops is for, it isn't supposed to be for doing platform dependent suspend/resume stuff that needs to be done for suspend to disk (as we currently try to use it!), it is instead for entering platform dependent suspend states ("standby", "mem"). 2. due to the first point, we never properly save FPU and altivec states when suspending to disk. It probably hasn't hurt yet because the process that writes the "disk" to /sys/power/state uses neither and its context is used. This patch addresses these points as follows: 1. remove all pm_ops from powermac, powermac suspend to ram isn't currently usable via /sys/power/state but is done via the PMU instead. 2. move the code responsible for storing FPU/altivec state into save_processor_state and the set_context() call to restore_processor_state. 3. add a call to kernel_enable_spe() It may look like there is some code removal missing but that is actually because the new suspend.h file overrides the ppc/suspend.h one which was previously used. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.hDavid Gibson2007-05-02
| | | | | | | | | | | | | | | | | | | | Currently, all 32-bit powerpc platforms use asm-ppc/pgtable.h and asm-ppc/pgalloc.h, even when otherwise compiled with ARCH=powerpc. Those asm-ppc files are a fairly nasty tangle of #ifdefs including a bunch of things which shouldn't be necessary any more in arch/powerpc. Cleaning up that mess is going to take a while, but this patch is a first step. It separates the asm-powerpc/pg{alloc,table}.h into 64 bit and 32 bit versions in asm-powerpc, which the basic .h files in asm-powerpc select based on config. We make a few tiny tweaks to the innards of the files along the way, making the outermost ifdefs (double-inclusion protection and __KERNEL__) a little cleaner, and #including asm-generic/pgtable.h from the top-level asm-powerpc/pgtable.h (since both the old 32-bit and 64-bit versions ended with such an #include). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fix STRICT_MM_TYPECHECKSDavid Gibson2007-05-02
| | | | | | | | | | | | | | Since we don't have it active by default, the STRICT_MM_TYPECHECKS option has bitrotted again. This patch fixes a couple of simple build fixes if the option is selected. First, pud_t mustn't be defined in page.h on 32-bit systems, because it conflicts with the version in the generic pud-folding code. Second, pci_32.c is missing a __pgprot() wrapper call. Third, a couple of PS3 files use constants of type pgprot_t when they need the raw values, we add pgprot_val() calls to fix this. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Revise PPC44x MMU code for arch/powerpcDavid Gibson2007-05-02
| | | | | | | | | | | | This patch takes the definitions for the PPC44x MMU (a software loaded TLB) from asm-ppc/mmu.h, cleans them up of things no longer necessary in arch/powerpc and puts them in a new asm-powerpc/mmu_44x.h file. It also substantially simplifies arch/powerpc/mm/44x_mmu.c and makes a couple of small fixes necessary for the 44x MMU code to build and work properly in arch/powerpc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Uninline of_iomap functionChristian Krafft2007-05-02
| | | | | | | | | There is no big reason to have that function inlined. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Move of_irq_to_resource from prom.h to prom_parse.cMathieu Desnoyers2007-05-02
| | | | | | | | | | In the powerpc architecture, of_irq_to_resource, currently sitting in prom.h, needs irq_of_parse_and_map and NO_IRQ from asm-powerpc/irq.h. The solution suggested by Benjamin Herrenschmidt is to move it to arch/powerpc/kernel/prom_parse.c. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pmac_feature_call checks platformBenjamin Herrenschmidt2007-05-02
| | | | | | | | | This patch makes sure that a caller of pmac_call_feature() won't try to call into ppc_md.feature_call of another platform, which might happen if some powermac drivers are loaded on non-powermac machines. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'for-2.6.22' of ↵Linus Torvalds2007-04-30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'for-2.6.22' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (255 commits) [POWERPC] Remove dev_dbg redefinition in drivers/ps3/vuart.c [POWERPC] remove kernel module option for booke wdt [POWERPC] Avoid putting cpu node twice [POWERPC] Spinlock initializer cleanup [POWERPC] ppc4xx_sgdma needs dma-mapping.h [POWERPC] arch/powerpc/sysdev/timer.c build fix [POWERPC] get_property cleanups [POWERPC] Remove the unused HTDMSOUND driver [POWERPC] cell: cbe_cpufreq cleanup and crash fix [POWERPC] Declare enable_kernel_spe in a header [POWERPC] Add dt_xlate_addr() to bootwrapper [POWERPC] bootwrapper: CONFIG_ -> CONFIG_DEVICE_TREE [POWERPC] Don't define a custom bd_t for Xilixn Virtex based boards. [POWERPC] Add sane defaults for Xilinx EDK generated xparameters files [POWERPC] Add uartlite boot console driver for the zImage wrapper [POWERPC] Stop using ppc_sys for Xilinx Virtex boards [POWERPC] New registration for common Xilinx Virtex ppc405 platform devices [POWERPC] Merge common virtex header files [POWERPC] Rework Kconfig dependancies for Xilinx Virtex ppc405 platform [POWERPC] Clean up cpufreq Kconfig dependencies ...
| * Merge branch 'linux-2.6' into for-2.6.22Paul Mackerras2007-04-29
| |\
| * | [POWERPC] Declare enable_kernel_spe in a headerJohannes Berg2007-04-29
| | | | | | | | | | | | | | | | | | | | | | | | This patch puts enable_kernel_spe into <asm-powerpc/system.h> along with enable_kernel_altivec etc. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Generic check_legacy_ioportOlaf Hering2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | check_legacy_ioport makes only sense on PREP, CHRP and pSeries. They may have an isa node with PS/2, parport, floppy and serial ports. Remove the check_legacy_ioport call from ppc_md, it's not needed anymore. Hardware capabilities come from the device-tree. Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Prepare for splitting up mmu.h by MMU typeDavid Gibson2007-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently asm-powerpc/mmu.h has definitions for the 64-bit hash based MMU. If CONFIG_PPC64 is not set, it instead includes asm-ppc/mmu.h which contains a particularly horrible mess of #ifdefs giving the definitions for all the various 32-bit MMUs. It would be nice to have the low level definitions for each MMU type neatly in their own separate files. It would also be good to wean arch/powerpc off dependence on the old asm-ppc/mmu.h. This patch makes a start on such a cleanup by moving the definitions for the 64-bit hash MMU to their own file, asm-powerpc/mmu_hash64.h. Definitions for the other MMUs still all come from asm-ppc/mmu.h, however each MMU type can now be one-by-one moved over to their own file, in the process cleaning them up stripping them of cruft no longer necessary in arch/powerpc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Remove old interface find_devicesStephen Rothwell2007-04-24
| | | | | | | | | | | | | | | | | | | | | Replace uses with of_find_node_by_name and for_each_node_by_name. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Remove old interface find_type_devicesStephen Rothwell2007-04-24
| | | | | | | | | | | | | | | | | | | | | Replaced by of_find_node_by_type. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Remove old interface find_path_deviceStephen Rothwell2007-04-24
| | | | | | | | | | | | | | | | | | | | | Replaced by of_find_node_by_path. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Remove find_all_nodesStephen Rothwell2007-04-24
| | | | | | | | | | | | | | | | | | | | | This old interface has no more users. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Remove find_compatible_devicesStephen Rothwell2007-04-24
| | | | | | | | | | | | | | | | | | | | | This is an old interface and is replaced by of_find_compatible_node. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Cleanup and fix breakage in tlbflush.hDavid Gibson2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git, although (AFAICT) only intended to affect ppc64, also has side-effects which break 44x. I think 40x, 8xx and Freescale Book E are also affected, though I haven't tested them. The problem lies in unconditionally removing flush_tlb_pending() from the versions of flush_tlb_mm(), flush_tlb_range() and flush_tlb_kernel_range() used on ppc64 - which are also used the embedded platforms mentioned above. The patch below cleans up the convoluted #ifdef logic in tlbflush.h, in the process restoring the necessary flushes for the software TLB platforms. There are three sets of definitions for the flushing hooks: the software TLB versions (revised to avoid using names which appear to related to TLB batching), the 32-bit hash based versions (external functions) amd the 64-bit hash based versions (which implement batching). It also moves the declaration of update_mmu_cache() to always be in tlbflush.h (previously it was in tlbflush.h except for PPC64, where it was in pgtable.h). Booted on Ebony (440GP) and compiled for 64-bit and 32-bit multiplatform. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Save trap number in bad_stackOlof Johansson2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Save the trap number in the case of getting a bad stack in an exception handler. It is sometimes useful to know what exception it was that caused this to happen. Without this, no trap number is reported. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Rename MPIC_BROKEN_U3 to MPIC_U3_HT_IRQSMichael Ellerman2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Rename MPIC_BROKEN_U3 to something a little more descriptive. Its effect is to enable support for HT irqs behind the PCI-X/HT bridge on U3/U4 (aka. CPC9x5) parts. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Add arch/powerpc driver for UIC, PPC4xx interrupt controllerDavid Gibson2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a driver to arch/powerpc/sysdev for the UIC, the on-chip interrupt controller from IBM/AMCC 4xx chips. It uses the new irq host mapping infrastructure. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] kprobes: Eliminate sstep exception if instruction can be emulatedAnanth N Mavinakayanahalli2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | For cases when probes are placed on instructions that can be emulated, don't take the single-step exception. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] pasemi: PA6T oprofile supportOlof Johansson2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Oprofile support for PA6T, kernel side. Also rename the PA6T_SPRN.* defines to SPRN_PA6T.*. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Fix PowerPC 750CL and 750GX CPU featuresJosh Boyer2007-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PowerPC 750CL has high BATs. The patch below adds a CPU_FTRS_750CL that includes that. Without it, the original firmware mappings in the high BATs aren't cleared which continue to override the linux translations. It also adds CPU_FTR_COMMON to CPU_FTRS_750GX for completeness. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | Merge branch 'for-2.6.22' of ↵Paul Mackerras2007-04-23
| |\ \ | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6 into for-2.6.22
| | * | [POWERPC] add of_iomap functionChristian Krafft2007-04-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The of_iomap function maps memory for a given device_node and returns a pointer to that memory. This is used at some places, so it makes sense to a seperate function. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| | * | [POWERPC] cell: add cbe_node_to_cpu functionChristian Krafft2007-04-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds code to deal with conversion of logical cpu to cbe nodes. It removes code that assummed there were two logical CPUs per CBE. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| * | | [POWERPC] spufs: make spu page faults not block schedulingArnd Bergmann2007-04-23
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Until now, we have always entered the spu page fault handler with a mutex for the spu context held. This has multiple bad side-effects: - it becomes impossible to suspend the context during page faults - if an spu program attempts to access its own mmio areas through DMA, we get an immediate livelock when the nopage function tries to acquire the same mutex This patch makes the page fault logic operate on a struct spu_context instead of a struct spu, and moves it from spu_base.c to a new file fault.c inside of spufs. We now also need to copy the dar and dsisr contents of the last fault into the saved context to have it accessible in case we schedule out the context before activating the page fault handler. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
| * | [POWERPC] DEBUG_PAGEALLOC for 32-bitBenjamin Herrenschmidt2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Here's an implementation of DEBUG_PAGEALLOC for ppc32. It disables BAT mapping and is only tested with Hash table based processor though it shouldn't be too hard to adapt it to others. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> arch/powerpc/Kconfig.debug | 9 ++++++ arch/powerpc/mm/init_32.c | 4 +++ arch/powerpc/mm/pgtable_32.c | 52 +++++++++++++++++++++++++++++++++++++++ arch/powerpc/mm/ppc_mmu_32.c | 4 ++- include/asm-powerpc/cacheflush.h | 6 ++++ 5 files changed, 74 insertions(+), 1 deletion(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Make tlb flush batch use lazy MMU modeBenjamin Herrenschmidt2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current tlb flush code on powerpc 64 bits has a subtle race since we lost the page table lock due to the possible faulting in of new PTEs after a previous one has been removed but before the corresponding hash entry has been evicted, which can leads to all sort of fatal problems. This patch reworks the batch code completely. It doesn't use the mmu_gather stuff anymore. Instead, we use the lazy mmu hooks that were added by the paravirt code. They have the nice property that the enter/leave lazy mmu mode pair is always fully contained by the PTE lock for a given range of PTEs. Thus we can guarantee that all batches are flushed on a given CPU before it drops that lock. We also generalize batching for any PTE update that require a flush. Batching is now enabled on a CPU by arch_enter_lazy_mmu_mode() and disabled by arch_leave_lazy_mmu_mode(). The code epects that this is always contained within a PTE lock section so no preemption can happen and no PTE insertion in that range from another CPU. When batching is enabled on a CPU, every PTE updates that need a hash flush will use the batch for that flush. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Add inatomic versions of __get_user and __put_userBenjamin Herrenschmidt2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | Those are needed by things like alignment exception fixup handlers since those can now be triggered by copy_tofrom_user_inatomic. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Rename get_property to of_get_property: includeStephen Rothwell2007-04-12
| | | | | | | | | | | | | | | | | | 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 drivers to map individual 4k pages to userspacePaul Mackerras2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some drivers have resources that they want to be able to map into userspace that are 4k in size. On a kernel configured with 64k pages we currently end up mapping the 4k we want plus another 60k of physical address space, which could contain anything. This can introduce security problems, for example in the case of an infiniband adaptor where the other 60k could contain registers that some other program is using for its communications. This patch adds a new function, remap_4k_pfn, which drivers can use to map a single 4k page to userspace regardless of whether the kernel is using a 4k or a 64k page size. Like remap_pfn_range, it would typically be called in a driver's mmap function. It only maps a single 4k page, which on a 64k page kernel appears replicated 16 times throughout a 64k page. On a 4k page kernel it reduces to a call to remap_pfn_range. The way this works on a 64k kernel is that a new bit, _PAGE_4K_PFN, gets set on the linux PTE. This alters the way that __hash_page_4K computes the real address to put in the HPTE. The RPN field of the linux PTE becomes the 4k RPN directly rather than being interpreted as a 64k RPN. Since the RPN field is 32 bits, this means that physical addresses being mapped with remap_4k_pfn have to be below 2^44, i.e. 0x100000000000. The patch also factors out the code in arch/powerpc/mm/hash_utils_64.c that deals with demoting a process to use 4k pages into one function that gets called in the various different places where we need to do that. There were some discrepancies between exactly what was done in the various places, such as a call to spu_flush_all_slbs in one case but not in others. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Make struct property's value a void *Stephen Rothwell2007-04-12
| | | | | | | | | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Rename prom_n_size_cells to of_n_size_cellsStephen Rothwell2007-04-12
| | | | | | | | | | | | | | | | | | | | | This is more consistent and gets us closer to the Sparc code. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Rename prom_n_addr_cells to of_n_addr_cellsStephen Rothwell2007-04-12
| | | | | | | | | | | | | | | | | | | | | This is more consistent and gets us closer to the Sparc code. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Rename device_is_compatible to of_device_is_compatibleStephen Rothwell2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is more consistent and gets us closer to the Sparc code. We add a device_is_compatible define for compatibility during the change over. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Rename get_property to of_get_propertyStephen Rothwell2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | This is more consistent and gets us closer to the Sparc code. We add a get_property define for compatibility during the change over. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=yOlof Johansson2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mtocrf is a faster single-field mtcrf (move to condition register fields) instruction available in POWER4 and later processors. It can make quite a difference in performance on some implementations, so use it for CONFIG_POWER4_ONLY builds. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Add a unified uevent handler for bus based on of_deviceSylvain Munaut2007-04-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This common uevent handler allow the several bus types based on of_device to generate the uevent properly and avoiding code duplication. This handlers take a struct device as argument and can therefore be used as the uevent call directly if no special treatment is needed for the bus. Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 00:33:21 -0500