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* MIPS: OCTEON: disable HOTPLUG_CPU if the bootloader version is incorrectAaro Koskinen2014-08-021-3/+9
| | | | | | | | | | Disable HOTPLUG_CPU functionality if the bootloader version is incorrect. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: linux-mips@linux-mips.org Cc: David Daney <ddaney.cavm@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7200/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: OCTEON: support disabling HOTPLUG_CPU run-timeAaro Koskinen2014-08-021-1/+4
| | | | | | | | | | If nosmp kernel option given, we can assume HOTPLUG_CPU is disabled. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7202/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: OCTEON: SMP: delete redundant checkAaro Koskinen2014-08-021-8/+0Star
| | | | | | | | | | | The same check is already done earlier in octeon_smp_hotplug_setup(). Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Patchwork: https://patchwork.linux-mips.org/patch/7199/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: SMP: Remove plat_smp_ops cpus_done method.Ralf Baechle2014-05-271-8/+0Star
| | | | | | | | | Nothing was using the method and there isn't any need for this hook. This leaves smp_cpus_done() empty for the moment. As suggested by Paul Bolle <pebolle@tiscali.nl>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Remove checks for CONFIG_CAVIUM_GDBPaul Bolle2014-05-231-17/+0Star
| | | | | | | | | | | | | | | | Three checks for CONFIG_CAVIUM_GDB were added in v2.6.29. But the Kconfig symbol CAVIUM_GDB was never added to the tree. Remove these checks. Also remove the last reference to octeon_get_boot_debug_flag(). There is no definition of that function anyway. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Tested-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>) Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/6976/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* mips: delete non-required instances of include <linux/init.h>Paul Gortmaker2014-01-241-1/+0Star
| | | | | | | | | | | None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6320/
* MIPS: Move declaration of Octeon function fixup_irqs() to header.Ralf Baechle2013-09-031-3/+1Star
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Delete __cpuinit/__CPUINIT usage from MIPS codePaul Gortmaker2013-07-151-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 3747069b25e419f6b51395f48127e9812abc3596 upstream. The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. Note that some harmless section mismatch warnings may result, since notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c) and are flagged as __cpuinit -- so if we remove the __cpuinit from the arch specific callers, we will also get section mismatch warnings. As an intermediate step, we intend to turn the linux/init.h cpuinit related content into no-ops as early as possible, since that will get rid of these warnings. In any case, they are temporary and harmless. Here, we remove all the MIPS __cpuinit from C code and __CPUINIT from asm files. MIPS is interesting in this respect, because there are also uasm users hiding behind their own renamed versions of the __cpuinit macros. [1] https://lkml.org/lkml/2013/5/20/589 [ralf@linux-mips.org: Folded in Paul's followup fix.] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5494/ Patchwork: https://patchwork.linux-mips.org/patch/5495/ Patchwork: https://patchwork.linux-mips.org/patch/5509/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Whitespace cleanup.Ralf Baechle2013-02-011-5/+5
| | | | | | | | Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: delay enable irq to ->smp_finish()Yong Zhang2012-07-191-1/+1
| | | | | | | | | | | To prepare for smoothing set_cpu_[active|online]() mess up Signed-off-by: Yong Zhang <yong.zhang0@gmail.com> Cc: Sergei Shtylyov <sshtylyov@mvista.com> Cc: David Daney <david.daney@cavium.com> Acked-by: David Daney <david.daney@cavium.com> Patchwork: https://patchwork.linux-mips.org/patch/3845/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Cavium: Remove smp_reserve_lock.Ralf Baechle2012-05-171-6/+0Star
| | | | | | | There is nothing that is protected by this lock and it's getting in the way of RT. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* documentation: remove references to cpu_*_map.Rusty Russell2012-03-291-1/+1
| | | | | | | This has been obsolescent for a while, fix documentation and misc comments. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* remove references to cpu_*_map in arch/Rusty Russell2012-03-291-1/+1
| | | | | | | | | | | | | | | | | | | | This has been obsolescent for a while; time for the final push. In adjacent context, replaced old cpus_* with cpumask_*. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: David S. Miller <davem@davemloft.net> (arch/sparc) Acked-by: Chris Metcalf <cmetcalf@tilera.com> (arch/tile) Cc: user-mode-linux-devel@lists.sourceforge.net Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Cc: Richard Kuo <rkuo@codeaurora.org> Cc: linux-hexagon@vger.kernel.org Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Helge Deller <deller@gmx.de> Cc: sparclinux@vger.kernel.org
* Disintegrate asm/system.h for MIPSDavid Howells2012-03-281-1/+1
| | | | | | | | Disintegrate asm/system.h for MIPS. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> cc: linux-mips@linux-mips.org
* MIPS: Fix up inconsistency in panic() string argument.Ralf Baechle2011-12-071-1/+1
| | | | | | | | Panic() invokes printk() to add a \n internally, so panic arguments should not themselves end in \n. Panic invocations in arch/mips and elsewhere are inconsistently sometimes terminating in \n, sometimes not. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Mark SMP-IPI interrupt as IRQF_NO_THREADVenkat Subbiah2011-11-081-2/+3
| | | | | | | | | | | | | | | This is to exclude it from force threading to allow RT patch set to work. And while on this line * Remove IRQF_DISABLED as as this flag is NOOP * Add IRQF_PERCPU as this is a per cpu interrupt. Signed-off-by: Venkat Subbiah <venkat.subbiah@cavium.com> Acked-by: David Daney <david.daney@cavium.com> To: linux-mips@linux-mips.org To: linux-rt-users@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/2817/ Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
*-. Merge branches 'sched-core-for-linus' and 'sched-urgent-for-linus' of ↵Linus Torvalds2011-05-201-0/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits) sched: Fix and optimise calculation of the weight-inverse sched: Avoid going ahead if ->cpus_allowed is not changed sched, rt: Update rq clock when unthrottling of an otherwise idle CPU sched: Remove unused parameters from sched_fork() and wake_up_new_task() sched: Shorten the construction of the span cpu mask of sched domain sched: Wrap the 'cfs_rq->nr_spread_over' field with CONFIG_SCHED_DEBUG sched: Remove unused 'this_best_prio arg' from balance_tasks() sched: Remove noop in alloc_rt_sched_group() sched: Get rid of lock_depth sched: Remove obsolete comment from scheduler_tick() sched: Fix sched_domain iterations vs. RCU sched: Next buddy hint on sleep and preempt path sched: Make set_*_buddy() work on non-task entities sched: Remove need_migrate_task() sched: Move the second half of ttwu() to the remote cpu sched: Restructure ttwu() some more sched: Rename ttwu_post_activation() to ttwu_do_wakeup() sched: Remove rq argument from ttwu_stat() sched: Remove rq->lock from the first half of ttwu() sched: Drop rq->lock from sched_exec() ... * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Fix rt_rq runtime leakage bug
| * | sched: Provide scheduler_ipi() callback in response to smp_send_reschedule()Peter Zijlstra2011-04-141-0/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For future rework of try_to_wake_up() we'd like to push part of that function onto the CPU the task is actually going to run on. In order to do so we need a generic callback from the existing scheduler IPI. This patch introduces such a generic callback: scheduler_ipi() and implements it as a NOP. BenH notes: PowerPC might use this IPI on offline CPUs under rare conditions! Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Reviewed-by: Frank Rowand <frank.rowand@am.sony.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20110405152728.744338123@chello.nl
* / MIPS: Octeon: Don't request interrupts for unused IPI mailbox bits.David Daney2011-05-191-8/+7Star
|/ | | | | | | | | | We only use the three low-order mailbox bits. Leave the upper bits alone for possible use by drivers and other software. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2090/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Rewrite interrupt handling code.David Daney2011-03-291-26/+13Star
| | | | | | | | | | | | | | | | | This includes conversion to new style irq_chip functions, and correctly enabling/disabling per-CPU interrupts. The hardware interrupt bit to irq number mapping is now done with a flexible map, instead of by bit twiddling the irq number. [ tglx: Adjusted to new irq_cpu_on/offline callbacks and __irq_set_affinity_lock ] Signed-off-by: David Daney <ddaney@caviumnetworks.com> Cc: linux-mips@linux-mips.org Cc: ralf@linux-mips.org LKML-Reference: <1301081931-11240-5-git-send-email-ddaney@caviumnetworks.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* MIPS: Octeon: HOTPLUG_CPU fixes.David Daney2010-08-051-71/+54Star
| | | | | | | | | | | | | | | | | | | | * Rename camel-case InitTLBStart_addr to octeon_bootloader_entry_addr. * Convert calls to cvmx_read64_uint32(), to simple pointer dereferences. * Set proper ebase. * Don't confuse coreid and cpu numbers. * Try to maintain consistent bootloader coremask. * Update the signature and boot_init_vector of supported bootloaders. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1491/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Simplify hotcpu_notifier registration.David Daney2010-08-051-7/+1Star
| | | | | | | Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1490/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Clean up SMP CPU numbering.David Daney2010-08-051-7/+30
| | | | | | | | | | Also number offline CPUs that could potentially be brought on-line later. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1489/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Cavium: Remove unused watchdog code.Ralf Baechle2010-04-121-8/+0Star
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Remove trailing space in messagesFrans Pop2010-02-271-1/+1
| | | | | | | | Signed-off-by: Frans Pop <elendil@planet.nl> To: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/946/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Fix compile error in arch/mips/cavium-octeon/smp.cDavid Daney2009-11-021-2/+3
| | | | | Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Octeon: Run IPI code with interrupts disabled.David Daney2009-08-031-2/+2
| | | | | | | | | | | In mm/slab.c the function do_ccupdate_local requires that interrupts be disabled. If they are not, we panic with CONFIG_DEBUG_SLAB. So we disable interrupts while processing IPIs. Also these are not shared irqs, so get rid of the IRQF_SHARED flag. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Cavium: Add CPU hotplugging code.Ralf Baechle2009-06-241-1/+233
| | | | | | Thanks to Cavium Inc. for the code contribution and help. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.David Daney2009-01-111-0/+211
These are the rest of the new files needed to add OCTEON processor support to the Linux kernel. Other than Makefile and Kconfig which should be obvious, we have: csrc-octeon.c -- Clock source driver for OCTEON. dma-octeon.c -- Helper functions for mapping DMA memory. flash_setup.c -- Register on-board flash with the MTD subsystem. octeon-irq.c -- OCTEON interrupt controller managment. octeon-memcpy.S -- Optimized memcpy() implementation. serial.c -- Register 8250 platform driver and early console. setup.c -- Early architecture initialization. smp.c -- OCTEON SMP support. octeon_switch.S -- Scheduler context switch for OCTEON. c-octeon.c -- OCTEON cache controller support. cex-oct.S -- OCTEON cache exception handler. asm/mach-cavium-octeon/*.h -- Architecture include files. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> create mode 100644 arch/mips/cavium-octeon/Kconfig create mode 100644 arch/mips/cavium-octeon/Makefile create mode 100644 arch/mips/cavium-octeon/csrc-octeon.c create mode 100644 arch/mips/cavium-octeon/dma-octeon.c create mode 100644 arch/mips/cavium-octeon/flash_setup.c create mode 100644 arch/mips/cavium-octeon/octeon-irq.c create mode 100644 arch/mips/cavium-octeon/octeon-memcpy.S create mode 100644 arch/mips/cavium-octeon/serial.c create mode 100644 arch/mips/cavium-octeon/setup.c create mode 100644 arch/mips/cavium-octeon/smp.c create mode 100644 arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/irq.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/war.h create mode 100644 arch/mips/include/asm/octeon/octeon.h create mode 100644 arch/mips/kernel/octeon_switch.S create mode 100644 arch/mips/mm/c-octeon.c create mode 100644 arch/mips/mm/cex-oct.S
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