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* [SPARC64]: of_device layer IRQ resolutionDavid S. Miller2006-06-303-2/+14
| | | | | | | | | | | | | | | | | | Do IRQ determination generically by parsing the PROM properties, and using IRQ controller drivers for final resolution. One immediate positive effect is that all of the IRQ frobbing in the EBUS, ISA, and PCI controller layers has been eliminated. We just look up the of_device and use the properly computed value. The PCI controller irq_build() routines are gone and no longer used. Unfortunately sbus_build_irq() has to remain as there is a direct reference to this in the sunzilog driver. That can be killed off once the sparc32 side of this is written and the sunzilog driver is transformed into an "of" bus driver. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Kill interrupt stuff and linux_phandle from device_node.David S. Miller2006-06-302-16/+0
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Add of_io{remap,unmap}().David S. Miller2006-06-302-0/+6
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Beginnings of generic of_device framework.David S. Miller2006-06-304-4/+28
| | | | | | | | | | The idea is to fully construct the device register and interrupt values into these of_device objects, and convert all of SBUS, EBUS, ISA drivers to use this new stuff. Much ideas and code taken from Ben H.'s powerpc work. Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC]: Add of_n_{addr,size}_cells().David S. Miller2006-06-302-0/+4
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [SPARC64]: Kill starfire_cookie from SBUS/PCI.David S. Miller2006-06-303-4/+1
| | | | | | | | | Totally unused. We need to traverse the list of global IRQ translaters, so storing it in the per-bus structures was useless. Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6Linus Torvalds2006-06-2911-115/+10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6: (22 commits) [PATCH] devfs: Remove it from the feature_removal.txt file [PATCH] devfs: Last little devfs cleanups throughout the kernel tree. [PATCH] devfs: Rename TTY_DRIVER_NO_DEVFS to TTY_DRIVER_DYNAMIC_DEV [PATCH] devfs: Remove the tty_driver devfs_name field as it's no longer needed [PATCH] devfs: Remove the line_driver devfs_name field as it's no longer needed [PATCH] devfs: Remove the videodevice devfs_name field as it's no longer needed [PATCH] devfs: Remove the gendisk devfs_name field as it's no longer needed [PATCH] devfs: Remove the miscdevice devfs_name field as it's no longer needed [PATCH] devfs: Remove the devfs_fs_kernel.h file from the tree [PATCH] devfs: Remove devfs_remove() function from the kernel tree [PATCH] devfs: Remove devfs_mk_cdev() function from the kernel tree [PATCH] devfs: Remove devfs_mk_bdev() function from the kernel tree [PATCH] devfs: Remove devfs_mk_symlink() function from the kernel tree [PATCH] devfs: Remove devfs_mk_dir() function from the kernel tree [PATCH] devfs: Remove devfs_*_tape() functions from the kernel tree [PATCH] devfs: Remove devfs support from the sound subsystem [PATCH] devfs: Remove devfs support from the ide subsystem. [PATCH] devfs: Remove devfs support from the serial subsystem [PATCH] devfs: Remove devfs from the init code [PATCH] devfs: Remove devfs from the partition code ...
| * [PATCH] devfs: Rename TTY_DRIVER_NO_DEVFS to TTY_DRIVER_DYNAMIC_DEVGreg Kroah-Hartman2006-06-261-3/+10
| | | | | | | | | | | | | | | | | | | | I've always found this flag confusing. Now that devfs is no longer around, it has been renamed, and the documentation for when this flag should be used has been updated. Also fixes all drivers that use this flag. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove the tty_driver devfs_name field as it's no longer neededGreg Kroah-Hartman2006-06-261-1/+0
| | | | | | | | | | | | Also fixes all drivers that set this field. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove the videodevice devfs_name field as it's no longer neededGreg Kroah-Hartman2006-06-261-1/+0
| | | | | | | | | | | | Also fixes all drivers that set this field. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove the gendisk devfs_name field as it's no longer neededGreg Kroah-Hartman2006-06-261-2/+0
| | | | | | | | | | | | | | And remove the now unneeded number field. Also fixes all drivers that set these fields. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove the miscdevice devfs_name field as it's no longer neededGreg Kroah-Hartman2006-06-261-1/+0
| | | | | | | | | | | | Also fixes all drivers that set this field. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove the devfs_fs_kernel.h file from the treeGreg Kroah-Hartman2006-06-263-11/+0
| | | | | | | | | | | | Also fixes up all files that #include it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs_remove() function from the kernel treeGreg Kroah-Hartman2006-06-261-3/+0
| | | | | | | | | | | | Removes the devfs_remove() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs_mk_cdev() function from the kernel treeGreg Kroah-Hartman2006-06-261-4/+0
| | | | | | | | | | | | Removes the devfs_mk_cdev() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs_mk_bdev() function from the kernel treeGreg Kroah-Hartman2006-06-261-4/+0
| | | | | | | | | | | | Removes the devfs_mk_bdev() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs_mk_symlink() function from the kernel treeGreg Kroah-Hartman2006-06-261-4/+0
| | | | | | | | | | | | Removes the devfs_mk_symlink() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs_mk_dir() function from the kernel treeGreg Kroah-Hartman2006-06-261-4/+0
| | | | | | | | | | | | Removes the devfs_mk_dir() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs_*_tape() functions from the kernel treeGreg Kroah-Hartman2006-06-261-7/+0
| | | | | | | | | | | | | | Removes the devfs_register_tape() and devfs_unregister_tape() functions and all callers of them. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs support from the ide subsystem.Greg Kroah-Hartman2006-06-261-1/+0
| | | | | | | | | | | | Also removes the ide drive devfs_name field as it's no longer needed Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs support from the serial subsystemGreg Kroah-Hartman2006-06-261-1/+0
| | | | | | | | | | | | Also fixes all serial drivers. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs from the init codeGreg Kroah-Hartman2006-06-261-4/+0
| | | | | | | | | | | | This patch removes the devfs code from the init/ directory. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] devfs: Remove devfs from the kernel treeGreg Kroah-Hartman2006-06-263-64/+0
| | | | | | | | | | | | | | | | This is the first patch in a series of patches that removes devfs support from the kernel. This patch removes the core devfs code, and its private header file. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2006-06-2912-37/+52
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (33 commits) [MIPS] Add missing backslashes to macro definitions. [MIPS] Death list of board support to be removed after 2.6.18. [MIPS] Remove BSD and Sys V compat data types. [MIPS] ioc3.h: Uses u8, so include <linux/types.h>. [MIPS] 74K: Assume it will also have an AR bit in config7 [MIPS] Treat CPUs with AR bit as physically indexed. [MIPS] Oprofile: Support VSMP on 34K. [MIPS] MIPS32/MIPS64 S-cache fix and cleanup [MIPS] excite: PCI makefile needs to use += if it wants a chance to work. [MIPS] excite: plat_setup -> plat_mem_setup. [MIPS] au1xxx: export dbdma functions [MIPS] au1xxx: dbdma, no sleeping under spin_lock [MIPS] au1xxx: fix PSC_SMBTXRX_RSR. [MIPS] Early printk for IP27. [MIPS] Fix handling of 0 length I & D caches. [MIPS] Typo fixes. [MIPS] MIPS32/MIPS64 secondary cache management [MIPS] Fix FIXADDR_TOP for TX39/TX49. [MIPS] Remove first timer interrupt setup in wrppmc_timer_setup() [MIPS] Fix configuration of R2 CPU features and multithreading. ...
| * | [MIPS] Add missing backslashes to macro definitions.Ralf Baechle2006-06-291-2/+2
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Remove BSD and Sys V compat data types.Ralf Baechle2006-06-291-5/+5
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] ioc3.h: Uses u8, so include <linux/types.h>.Ralf Baechle2006-06-291-0/+2
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] au1xxx: fix PSC_SMBTXRX_RSR.Domen Puncer2006-06-291-1/+1
| | | | | | | | | | | | | | | Signed-off-by: Domen Puncer <domen.puncer@ultra.si> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Fix FIXADDR_TOP for TX39/TX49.Atsushi Nemoto2006-06-291-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | FIXADDR_TOP is used for HIGHMEM and for upper limit of vmalloc area on 32bit kernel. TX39XX and TX49XX have "reserved" segment in CKSEG3 area. 0xff000000-0xff3fffff on TX49XX and 0xff000000-0xfffeffff on TX39XX are reserved (unmapped, uncached) therefore can not be used as mapped area. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Fix configuration of R2 CPU features and multithreading.Ralf Baechle2006-06-291-12/+8
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | elf-em.h: Define and explain both EM_MIPS_RS3_LE and EM_MIPS_RS4_BE.Ralf Baechle2006-06-291-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | They have been obsoleted by the ELF header EI_CLASS and EI_DATA fields in combination with e_flags. Afaics EM_MIPS_RS3_LE and EM_MIPS_RS4_BE never had any practical relevance. Binutils will not produce such binaries and the kernel will not accept them as MIPS binaries. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Fix use of ehb instruction for non-R2 configurations.Ralf Baechle2006-06-293-11/+12
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Define ARCH_HAS_IRQ_PER_CPU for all SMP systems.Ralf Baechle2006-06-292-6/+4
| | | | | | | | | | | | | | | | | | Without SMTC on non-Malta will blow up. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | [MIPS] Wire up tee(2).Ralf Baechle2006-06-291-6/+9
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | Merge master.kernel.org:/pub/scm/linux/kernel/git/perex/alsaLinus Torvalds2006-06-293-13/+26
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: [ALSA] echoaudio - Remove kfree_nocheck() [ALSA] echoaudio - Fix Makefile [ALSA] Add Intel D965 board support [ALSA] Fix/add support of Realtek ALC883 / ALC888 and ALC861 codecs [ALSA] Fix a typo in echoaudio/midi.c [ALSA] snd-aoa: enable dual-edge in GPIOs [ALSA] snd-aoa: support iMac G5 iSight [ALSA] snd-aoa: not experimental [ALSA] Add echoaudio sound drivers [ALSA] ak4xxx-adda - Code clean-up [ALSA] Remove CONFIG_EXPERIMENTAL from intel8x0m driver [ALSA] Stereo controls for M-Audio Revolution cards [ALSA] Fix misuse of __list_add() in seq_ports.c [ALSA] hda-codec - Add model entry for Samsung X60 Chane [ALSA] make CONFIG_SND_DYNAMIC_MINORS non-experimental [ALSA] Fix wrong dependencies of snd-aoa driver [ALSA] fix build failure due to snd-aoa [ALSA] AD1888 mixer controls for DC mode [ALSA] Suppress irq handler mismatch messages in ALSA ISA drivers [ALSA] usb-audio support for Turtle Beach Roadie
| * | | [ALSA] ak4xxx-adda - Code clean-upTakashi Iwai2006-06-281-14/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix spaces, fold lines to fit 80 columns in ak4xxx-adda driver codes. Split a long reset function to each codec routine just for better readability. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * | | [ALSA] Stereo controls for M-Audio Revolution cardsJani Alinikula2006-06-281-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds stereo controls to revo cards by making the ak4xxx driver mixers configurable from the card driver. Signed-off-by: Jani Alinikula <janialinikula@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * | | [ALSA] AD1888 mixer controls for DC modeJaya Kumar2006-06-281-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds two mixer controls. The V_REFOUT enable is a documented register that couples the microphone input lines to the V_REFOUT DC source. The High Pass Filter enable in the AC97_AD_TEST2 (0x5c) is an undocumented register provided by Miller Puckette via Analog Devices that enables the AD codec to apply a high pass filter to the input. Signed-off-by: Jaya Kumar <jayakumar.alsa@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * | | [ALSA] Suppress irq handler mismatch messages in ALSA ISA driversTakashi Iwai2006-06-281-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Suppress 'irq handler mismatch' messages at auto-probing of irqs in ALSA ISA drivers. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds2006-06-2913-59/+663
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (43 commits) [POWERPC] Use little-endian bit from firmware ibm,pa-features property [POWERPC] Make sure smp_processor_id works very early in boot [POWERPC] U4 DART improvements [POWERPC] todc: add support for Time-Of-Day-Clock [POWERPC] Make lparcfg.c work when both iseries and pseries are selected [POWERPC] Fix idr locking in init_new_context [POWERPC] mpc7448hpc2 (taiga) board config file [POWERPC] Add tsi108 pci and platform device data register function [POWERPC] Add general support for mpc7448hpc2 (Taiga) platform [POWERPC] Correct the MAX_CONTEXT definition powerpc: minor cleanups for mpc86xx [POWERPC] Make sure we select CONFIG_NEW_LEDS if ADB_PMU_LED is set [POWERPC] Simplify the code defining the 64-bit CPU features [POWERPC] powerpc: kconfig warning fix [POWERPC] Consolidate some of kernel/misc*.S [POWERPC] Remove unused function call_with_mmu_off [POWERPC] update asm-powerpc/time.h [POWERPC] Clean up it_lp_queue.h [POWERPC] Skip the "copy down" of the kernel if it is already at zero. [POWERPC] Add the use of the firmware soft-reset-nmi to kdump. ...
| * | | | [POWERPC] todc: add support for Time-Of-Day-ClockMark A. Greer2006-06-291-0/+487
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a resubmit with a proper subject and with all comments addressed. Applies cleanly to powerpc.git 649e85797259162f7fdc696420e7492f20226f2d Mark -- The todc code from arch/ppc supports many todc/rtc chips and is needed in arch/powerpc. This patch adds the todc code to arch/powerpc. Signed-off-by: Mark A. Greer <mgreer@mvista.com> -- arch/powerpc/Kconfig | 7 arch/powerpc/sysdev/Makefile | 1 arch/powerpc/sysdev/todc.c | 392 ++++++++++++++++++++++++++++++++++ include/asm-powerpc/todc.h | 487 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 887 insertions(+) -- Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] Add tsi108 pci and platform device data register functionZang Roy-r619112006-06-291-0/+109
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add Tundra Semiconductor tsi108 pci and platform device data register function support. Signed-off-by: Alexandre Bounine <alexandreb@tundra.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> --- Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | [POWERPC] Correct the MAX_CONTEXT definitionPaul Mackerras2006-06-291-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we increased the address space per process to 2^44 bytes, the number of contexts that we could actually use reduced, but we forgot to decrease the MAX_CONTEXT definition. (Fortunately this would only cause problems if we actually had more than 512k user processes running.) This patch corrects the definition. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | Merge branch 'for_paulus' of ↵Paul Mackerras2006-06-281-4/+0
| |\ \ \ \ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc
| | * | | | powerpc: minor cleanups for mpc86xxKumar Gala2006-06-281-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Remove duplicated cputable entry for 8641 (matches w/7448) * Removed __init from function prototypes in mpc86xx.h * Moved pci fixups into board specific code * Moved mpc86xx_exclude_device to generic mpc86xx pci code * Fixed sparse warnings in mpc86xx_smp.c * Removed board specific header include from asm-powerpc/mpc86xx.h Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | | | | [POWERPC] Simplify the code defining the 64-bit CPU featuresPaul Mackerras2006-06-281-28/+20
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] update asm-powerpc/time.hStephen Rothwell2006-06-281-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we ever build a combined kernel including iSeries, then this will be needed. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Clean up it_lp_queue.hStephen Rothwell2006-06-281-20/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No more StudlyCaps. Remove from a couple of places it is no longer needed. Use C style comments. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Add the use of the firmware soft-reset-nmi to kdump.David Wilder2006-06-281-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With this patch, kdump uses the firmware soft-reset NMI for two purposes: 1) Initiate the kdump (take a crash dump) by issuing a soft-reset. 2) Break a CPU out of a deadlock condition that is detected during kdump processing. When a soft-reset is initiated each CPU will enter system_reset_exception() and set its corresponding bit in the global bit-array cpus_in_sr then call die(). When die() finds the CPU's bit set in cpu_in_sr crash_kexec() is called to initiate a crash dump. The first CPU to enter crash_kexec() is called the "crashing CPU". All other CPUs are "secondary CPUs". The secondary CPU's pass through to crash_kexec_secondary() and sleep. The crashing CPU waits for all CPUs to enter via soft-reset then boots the kdump kernel (see crash_soft_reset_check()) When the system crashes due to a panic or exception, crash_kexec() is called by panic() or die(). The crashing CPU sends an IPI to all other CPUs to notify them of the pending shutdown. If a CPU is in a deadlock or hung state with interrupts disabled, the IPI will not be delivered. The result being, that the kdump kernel is not booted. This problem is solved with the use of a firmware generated soft-reset. After the crashing_cpu has issued the IPI, it waits for 10 sec for all CPUs to enter crash_ipi_callback(). A CPU signifies its entry to crash_ipi_callback() by setting its corresponding bit in the cpus_in_crash bit array. After 10 sec, if one or more CPUs have not set their bit in cpus_in_crash we assume that the CPU(s) is deadlocked. The operator is then prompted to generate a soft-reset to break the deadlock. Each CPU enters the soft reset handler as described above. Two conditions must be handled at this point: 1) The system crashed because the operator generated a soft-reset. See 2) The system had crashed before the soft-reset was generated ( in the case of a Panic or oops). The first CPU to enter crash_kexec() uses the state of the kexec_lock to determine this state. If kexec_lock is already held then condition 2 is true and crash_kexec_secondary() is called, else; this CPU is flagged as the crashing CPU, the kexec_lock is acquired and crash_kexec() proceeds as described above. Each additional CPUs responding to the soft-reset will pass through crash_kexec() to kexec_secondary(). All secondary CPUs call crash_ipi_callback() readying them self's for the shutdown. When ready they clear their bit in cpus_in_sr. The crashing CPU waits in kexec_secondary() until all other CPUs have cleared their bits in cpus_in_sr. The kexec kernel boot is then started. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: David Wilder <dwilder@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | | | [POWERPC] Add udbg support for RTAS consoleMichael Ellerman2006-06-281-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add udbg hooks for the RTAS console, based on the RTAS put-term-char and get-term-char calls. Along with my previous patches, this should enable debugging as soon as early_init_dt_scan_rtas() is called. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 08:36:27 +0100