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* [PATCH] libata: add a function to decide if we need iordyAlan Cox2006-01-171-0/+2
| | | | | | | This ought to be simple but for PIO2 we have to poke around the drive data to get it 100% correct. Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvbLinus Torvalds2006-01-164-3/+73
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| * Merge branch 'master' of ↵Mauro Carvalho Chehab2006-01-164-3/+73
| |\ | | | | | | | | | ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb
| | * Merge branch 'work'Mauro Carvalho Chehab2006-01-153-4/+31
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| | | * V4L/DVB (3388): tuner_params->tda988x is currently unused, so disableMichael Krufky2006-01-151-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Tuner_params->tda988x is unused right now, so let's disable it for 2.6.16 - This is currently happening at the card level, but the plan is to move this configuration into the tuner_params configuration. Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | | * V4L/DVB (3387): clean up some commentsMichael Krufky2006-01-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - clean up some comments Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | | * V4L/DVB (3384): Separate tv & radio freqs, fix cb/freq transmit order for ↵Hans Verkuil2006-01-153-3/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tuners that need this. - Moved MSP_SET_MATRIX to v4l2-common.h - Fix typos and integer overflows in tea5767.c - Split old freq field into a tv_freq and a radio_freq. Prevents that a radio tuner is initialized with a tv frequency or vice versa. - When switching to radio mode initialize the tuner with the last used radio frequency (this was already done for the TV mode). As a result of these changes the tuner module now remembers the last set radio and TV frequencies, which is what you would expect to happen. - Move out of range frequencies to the closest valid frequency as per v4l2 API spec. - Fix incorrect initial radio frequency (multiplier is 16000, not 16) - Add boundary check for out of range frequencies. - Use new flag to check if the order of the CB and freq. depends on the last set frequency. That is needed for some tuners or you can get static as a result. The flag is added for those tuners where I know that the datasheet indicates that this is necessary. - For this new check use the last set div value, not the last frequency as radio frequencies are always much higher due to the 16000 multiplier. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | | * V4L/DVB (3383): Move tda988x options into tuner_params struct.Michael Krufky2006-01-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Tda988x parameters should be defined per tuner_param_type, for each tuner_params array member. Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | * | Merge branch 'work'Mauro Carvalho Chehab2006-01-151-0/+4
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| | | * V4L/DVB (3365): i2c ids for upd64031a saa717x upd64083 wm8739Tyler Trafford2006-01-151-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add i2c ids for drivers: upd64031a saa717x upd64083 wm8739 Signed-off-by: Tyler Trafford <tatrafford@comcast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | * | Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6Mauro Carvalho Chehab2006-01-15144-1048/+5319
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| | * | V4L/DVB (3364): disable all dvb tuner param_types until we need themMichael Krufky2006-01-131-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add param_type dvbs2 - disable all dvb param_types, which will not be needed until we merge dvb-pll. Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | * | V4L/DVB (3363): Add support for Samsung tuner TCPN 2121P30AHans Verkuil2006-01-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add support for Samsung tuner TCPN 2121P30A, used in Hauppauge PVR-500 cards. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| | * | V4L/DVB (3359): Redesign tuners struct for maximum flexibilityMichael Krufky2006-01-132-0/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Tunertype struct redefined to allow one or more tuner_params structs per tuner definition, one for each video standard. - Each tuner_params struct has an element containing an arbitrary amount of tuner_ranges. (this is needed for dvb tuners - to be handled later) - A tuner_range may be referenced by multiple tuner_params structs. There are many duplicates in here. Reusing tuner_range structs, rather than defining new ones for each tuner, will cut down on memory usage, and is preferred when possible. - tunertype struct contains an element, has_tda988x. We must set this for all tunertypes that contain a tda988x chip, and then we can remove this setting from the various card structs. - Improves tuners array memory usage efficiency. - Right now, all tuners are using the first tuner_params[] array element for analog mode. In the future, we will be merging similar tuner definitions together, such that each tuner definition will have a tuner_params struct for each available video standard. At that point, the tuner_params[] array element will be chosen based on the video standard in use. Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* | | | [PATCH] x86_64: Fix VSMP buildRavikiran G Thirumalai2006-01-161-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch fixes a build problem with CONFIG_X86_VSMP. The vSMP bits probably gathered some fuzz on its way to mainline, and safe_halt() which was outside the #endif (CONFIG_X86_VSMP) somehow got inside the !CONFIG_X86_VSMP condition, hence being undefined and breaking CONFIG_X86_VSMP builds. Patch takes safe_halt() and halt() macros out of the #endif Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: add __meminit for memory hotplugMatt Tolentino2006-01-161-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add __meminit to the __init lineup to ensure functions default to __init when memory hotplug is not enabled. Replace __devinit with __meminit on functions that were changed when the memory hotplug code was introduced. Signed-off-by: Matt Tolentino <matthew.e.tolentino@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: Flexmap for 32bit and randomized mappings for 64bitAndi Kleen2006-01-162-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Another try at this. For 32bit follow the 32bit implementation from Ingo - mappings are growing down from the end of stack now and vary randomly by 1GB. Randomized mappings for 64bit just vary the normal mmap break by 1TB. I didn't bother implementing full flex mmap for 64bit because it shouldn't be needed there. Cc: mingo@elte.hu Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] add /sys/fsMiklos Szeredi2006-01-161-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an empty /sys/fs, which filesystems can use. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] sh: Simple timer frameworkPaul Mundt2006-01-161-0/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This builds on some of the clock framework code to support a simple system timer interface. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] sh: Simplistic clock frameworkPaul Mundt2006-01-163-11/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds a relatively simplistic clock framework for sh. The initial goal behind this is to clean up the arch/sh/kernel/time.c mess and to get the CPU subtype-specific frequency setting and calculation code moved somewhere more sensible. This only deals with the core clocks at the moment, though it's trivial for other drivers to define their own clocks as desired. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] sh: I/O routine cleanups and ioremap() overhaulPaul Mundt2006-01-163-201/+244
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This introduces a few changes in the way that the I/O routines are defined on SH, specifically so that things like the iomap API properly wrap through the machvec for board-specific quirks. In addition to this, the old p3_ioremap() work is converted to a more generic __ioremap() that will map through the PMB if it's available, or fall back on page tables for everything else. An alpha-like IO_CONCAT is also added so we can start to clean up the board-specific io.h mess, which will be handled in board update patches.. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] sh: IRQ handler updatesPaul Mundt2006-01-162-65/+427
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This moves the various IRQ controller drivers into a new subdirectory, and also extends the INTC2 IRQ handler to also deal with SH7760 and SH7780 interrupts, rather than just ST-40. The old CONFIG_SH_GENERIC has also been removed from the IRQ definitions, as new ports are expected to be based off of CONFIG_SH_UNKNOWN. Since there are plenty of incompatible machvecs, CONFIG_SH_GENERIC doesn't make sense anymore. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] sh: kexec() supportkogiidena2006-01-162-0/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds kexec() support for SH. Signed-off-by: kogiidena <kogiidena@eggplant.ddo.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org> Cc: <fastboot@lists.osdl.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] sh: DMA updatesPaul Mundt2006-01-165-26/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This extends the current SH DMA API somewhat to support a proper virtual channel abstraction, and also works to represent this through the driver model by giving each DMAC its own platform device. There's also a few other minor changes to support a few new CPU subtypes, and make TEI generation for the SH DMAC configurable. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] arm26: add L1_CACHE_SHIFTAlexey Dobriyan2006-01-161-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix reiserfs compilation as a side effect =) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] fix arm26 THREAD_SIZEAdrian Bunk2006-01-161-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arm26 currently has a 256 kB THREAD_SIZE (sic). Looking at the comment in the code, this seems to be based on a misunderstanding. The comment says: this needs attention (see kernel/fork.c which gets a nice div by zero if this is lower than 8*32768 kernel/fork.c does: max_threads = mempages / (8 * THREAD_SIZE / PAGE_SIZE) Therefore, a division by 0 is impossible for all reasonable cases with THREAD_SIZE >= PAGE_SIZE. Since the minimum PAGE_SIZE Linux uses on the arm26 architecture is 16k, PAGE_SIZE should be sufficient for THREAD_SIZE. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Ian Molton <spyro@f2s.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | Merge branch 'release' of ↵Linus Torvalds2006-01-1615-1504/+1504
|\ \ \ \ | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
| * \ \ \ Pull perfmon-montecito into release branchTony Luck2006-01-161-2/+2
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| | * | | | [IA64] Perfmon for MontecitoStephane Eranian2006-01-161-2/+2
| | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add Montecito PMU description table for perfmon2 Signed-off-by: Stephane Eranian <eranian@hpl.hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | | [IA64] Cleanup of arch/ia64/sn and include/asm-ia64/snPrarit Bhargava2006-01-1613-1501/+1501
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace uintX_t declarations with uX declarations. Replace intX_t declarations with sX declarations. Signed-off-by: Prarit Bhargava <prarit@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | | [IA64] pal cache flush patchXu, Anthony2006-01-161-1/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Because PAL spec has changed since 2002, you can goto http://developer.intel.com/design/itanium/manuals/iiasdmanual.htm to download new SDM, all PAL calls should be invoked with psr.ic=1, and it's caller's responsibility to handle possible tlb miss. Ia64_pal_cache_flush was written according to old spec, it is obsolete, and this patch has ia64_pal_cache_flush conform to new spec. Signed-off-by Anthony Xu <anthony.xu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [PATCH] x86_64: Increase NR_IRQ_VECTORS to 32 * NR_CPUSAndi Kleen2006-01-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This prevents running out of GSIs on large Unisys ES7000 machines. Follows i386 Cc: "Protasevich, Natalie" <Natalie.Protasevich@unisys.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] x86_64: Allow nesting of int3 by default for kprobesAndi Kleen2006-01-162-7/+7
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This unbreaks recursive kprobes which didn't work anymore due to an earlier patch which converted the debug entry point to use an IST. This also allows nesting of the debug entry point too. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2006-01-152-2/+2
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| * | Fix "stuct", "strut", "struc" typosAlexey Dobriyan2006-01-152-2/+2
| | | | | | | | | | | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* | | Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-01-151-0/+2
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| * | | [ARM] Fix missing compiler.h includeRussell King2006-01-151-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | asm/mach/arch.h introduced a __deprecated, but didn't include compiler.h, causing: In file included from arch/arm/mach-at91rm9200/devices.c:13: include/asm/mach/arch.h:23: warning: no semicolon at end of struct or union include/asm/mach/arch.h:23: error: syntax error before 'phys_ram' include/asm/mach/arch.h:34: error: syntax error before ':' token include/asm/mach/arch.h:35: error: syntax error before ':' token include/asm/mach/arch.h:36: error: syntax error before ':' token include/asm/mach/arch.h:37: error: syntax error before ':' token include/asm/mach/arch.h:45: error: syntax error before '}' token Add the necessary include. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | [PATCH] Use atomic64_set for 64-bit case of atomic_long_setKyle McMartin2006-01-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For some reason, the BITS_PER_LONG == 64 case of atomic_long_set was using atomic_set instead of atomic64_set. This does not jive with architectures which use an inline instead of a #define to implement their atomic_set() primitives. Signed-off-by: Kyle McMartin <kyle@parisc-linux.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-mergeLinus Torvalds2006-01-152-12/+81
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| * | | [PATCH] ppc: Remove powermac support from ARCH=ppcPaul Mackerras2006-01-151-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This makes it possible to build kernels for PReP and/or CHRP with ARCH=ppc by removing the (non-building) powermac support. It's now also possible to select PReP and CHRP independently. Powermac users should now build with ARCH=powerpc instead of ARCH=ppc. (This does mean that it is no longer possible to build a 32-bit kernel for a G5.) Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | [PATCH] powerpc: Fix kdump copy regs and dynamic allocate per-cpu crash notesHaren Myneni2006-01-151-12/+73
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - This contains the arch specific changes for the following the kdump generic fixes which were already accepted in the upstream. . Capturing CPU registers (for the case of 'panic' and invoking the dump using 'sysrq-trigger') from a function (stack frame) which will be not be available during the kdump boot. Hence, might result in invalid stack trace. . Dynamically allocating per cpu ELF notes section instead of statically for NR_CPUS. - Fix the compiler warning in prom_init.c. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | Merge master.kernel.org:/home/rmk/linux-2.6-serialLinus Torvalds2006-01-141-1/+2
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| * | | [SERIAL] convert uart_state.sem to uart_state.mutexIngo Molnar2006-01-131-1/+2
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | semaphore to mutex conversion. the conversion was generated via scripts, and the result was validated automatically via a script as well. build and boot tested. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-01-1411-65/+155
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| * | | [ARM] 3262/4: allow ptraced syscalls to be overridenNicolas Pitre2006-01-141-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre This is needed by strace to properly handle the tracing of some system calls. It could be useful for other applications as well. Based on an earlier patch from Daniel Jacobowitz. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Daniel Jacobowitz <dan@debian.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 3110/5: old ABI compat: multi-ABI syscall entry supportNicolas Pitre2006-01-141-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre This patch adds the required code to support both user space ABIs at the same time. A second syscall table is created to include legacy ABI syscalls that need an ABI compat wrapper. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 3108/2: old ABI compat: statfs64 and fstatfs64Nicolas Pitre2006-01-141-1/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre struct statfs64 has extra padding with EABI growing its size from 84 to 88. This struct is now __attribute__((packed,aligned(4))) with a small assembly wrapper to force the sz argument to 84 if it is 88 to avoid copying the extra padding over user space memory unexpecting it. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 3106/2: ARM EABI: some syscall adjustmentsNicolas Pitre2006-01-141-9/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre Fix a few syscalls for EABI requirements. They were sys_pread64 and sys_pwrite64 where the last argument is now entirely pushed on stack, but since commit 567bd98017d9c9f2ac1c148ddc78c062e8abd398 they don't require any fixup. Remains only the stat64 structure. Non EABI kernels are unaffected. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 3105/4: ARM EABI: new syscall entry conventionNicolas Pitre2006-01-141-22/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre For a while we wanted to change the way syscalls were called on ARM. Instead of encoding the syscall number in the swi instruction which requires reading back the instruction from memory to extract that number and polluting the data cache, it was decided that simply storing the syscall number into r7 would be more efficient. Since this represents an ABI change then making that change at the same time as EABI support is the right thing to do. It is now expected that EABI user space binaries put the syscall number into r7 and use "swi 0" to call the kernel. Syscall register argument are also expected to have "EABI arrangement" i.e. 64-bit arguments should be put in a pair of registers from an even register number. Example with long ftruncate64(unsigned int fd, loff_t length): legacy ABI: - put fd into r0 - put length into r1-r2 - use "swi #(0x900000 + 194)" to call the kernel new ARM EABI: - put fd into r0 - put length into r2-r3 (skipping over r1) - put 194 into r7 - use "swi 0" to call the kernel Note that it is important to use 0 for the swi argument as backward compatibility with legacy ABI user space relies on this. The syscall macros in asm-arm/unistd.h were also updated to support both ABIs and implement the right call method automatically. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [ARM] 3102/1: ARM EABI: stack pointer must be 64-bit aligned after a CPU ↵Nicolas Pitre2006-01-141-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | exception Patch from Nicolas Pitre The ARM EABI says that the stack pointer has to be 64-bit aligned for reasons already mentioned in patch #3101 when calling C functions. We therefore must verify and adjust sp accordingly when taking an exception from kernel mode since sp might not necessarily be 64-bit aligned if the exception occurs in the middle of a kernel function. If the exception occurs while in user mode then no sp fixup is needed as long as sizeof(struct pt_regs) as well as any additional syscall data stack space remain multiples of 8. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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