linux-toradex.git/arch/mips/kernel/irq.c, branch v4.2.7

MIPS: IRQ/IP27: Move IRQ allocation API to platform code.

2015-06-21T19:54:31+00:00

allocate_irqno, free_irqno and alloc_legacy_irqno are a simple allocator
for interrupt numbers from the days when the numer of interrupts was still
fixed to NR_IRQS.  This was necessary for the SGI IP27 architecture which
with its flexible architecture and possibly large number of interrupts
doesn't easily fit into the old pattern.  These days there are better
alternatives.

Move the allocation code from the arch generic code to the only platform
using it, the SGI IP27 aka Origin 200/2000, Onyx 2.

Signed-off-by: Ralf Baechle

MIPS: Get rid of 'kgdb_early_setup' cruft.

2015-06-21T19:54:10+00:00

Commit 854700115ecf ([MIPS] kgdb: add arch support for the kernel's kgdb core)
added the 'kgdb_early_setup' flag to avoid  calling trap_init() and init_IRQ()
the second time, however the code that called these functions earlier,  from
kgdb_arch_init(), had been already removed by that  time,  so the flag never
served any useful purpose. Remove the related code along with ugly #ifdef'ery
at last.

[ralf@linux-mips.org: Folded in Guenter Roeck's fix.]

Signed-off-by: Sergei Shtylyov 
Patchwork: https://patchwork.linux-mips.org/patch/10501/
Signed-off-by: Guenter Roeck 
Patchwork: https://patchwork.linux-mips.org/patch/10533/
Signed-off-by: Ralf Baechle

MIPS: Fix enabling of DEBUG_STACKOVERFLOW

2015-06-06T08:21:09+00:00

Commit 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") added
kernel stack overflow detection, however it only enabled it conditional
upon the preprocessor definition DEBUG_STACKOVERFLOW, which is never
actually defined. The Kconfig option is called DEBUG_STACKOVERFLOW,
which manifests to the preprocessor as CONFIG_DEBUG_STACKOVERFLOW, so
switch it to using that definition instead.

Fixes: 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection")
Signed-off-by: James Hogan 
Cc: Ralf Baechle 
Cc: Adam Jiang 
Cc: linux-mips@linux-mips.org
Cc:  # 2.6.37+
Patchwork: http://patchwork.linux-mips.org/patch/10531/
Signed-off-by: Ralf Baechle

MIPS: irq: Use DECLARE_BITMAP

2015-05-26T14:46:52+00:00

Use the generic mechanism to declare a bitmap instead of unsigned long.

This could fix an overwrite defect of whatever follows irq_map.

Not all "#define NR_IRQS " are a multiple of BITS_PER_LONG so
using DECLARE_BITMAP allocates the proper number of longs required
for the possible bits.

For instance:

arch/mips/include/asm/mach-ath79/irq.h:#define NR_IRQS                  51
arch/mips/include/asm/mach-db1x00/irq.h:#define NR_IRQS 152
arch/mips/include/asm/mach-lantiq/falcon/irq.h:#define NR_IRQS 328

Signed-off-by: Joe Perches 
Cc: linux-mips 
Cc: LKML 
Cc: Gabor Juhos 
Cc: Manuel Lauss 
Cc: John Crispin 
Patchwork: https://patchwork.linux-mips.org/patch/10091/
Signed-off-by: Ralf Baechle

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2014-06-10T01:10:34+00:00

Pull MIPS updates from Ralf Baechle:
 - three fixes for 3.15 that didn't make it in time
 - limited Octeon 3 support.
 - paravirtualization support
 - improvment to platform support for Netlogix SOCs.
 - add support for powering down the Malta eval board in software
 - add many instructions to the in-kernel microassembler.
 - add support for the BPF JIT.
 - minor cleanups of the BCM47xx code.
 - large cleanup of math emu code resulting in significant code size
   reduction, better readability of the code and more accurate
   emulation.
 - improvments to the MIPS CPS code.
 - support C3 power status for the R4k count/compare clock device.
 - improvments to the GIO support for older SGI workstations.
 - increase number of supported CPUs to 256; this can be reached on
   certain embedded multithreaded ccNUMA configurations.
 - various small cleanups, updates and fixes

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (173 commits)
  MIPS: IP22/IP28: Improve GIO support
  MIPS: Octeon: Add twsi interrupt initialization for OCTEON 3XXX, 5XXX, 63XX
  DEC: Document the R4k MB ASIC mini interrupt controller
  DEC: Add self as the maintainer
  MIPS: Add microMIPS MSA support.
  MIPS: Replace calls to obsolete strict_strto call with kstrto* equivalents.
  MIPS: Replace obsolete strict_strto call with kstrto
  MIPS: BFP: Simplify code slightly.
  MIPS: Call find_vma with the mmap_sem held
  MIPS: Fix 'write_msa_##' inline macro.
  MIPS: Fix MSA toolchain support detection.
  mips: Update the email address of Geert Uytterhoeven
  MIPS: Add minimal defconfig for mips_paravirt
  MIPS: Enable build for new system 'paravirt'
  MIPS: paravirt: Add pci controller for virtio
  MIPS: Add code for new system 'paravirt'
  MIPS: Add functions for hypervisor call
  MIPS: OCTEON: Add OCTEON3 to __get_cpu_type
  MIPS: Add function get_ebase_cpunum
  MIPS: Add minimal support for OCTEON3 to c-r4k.c
  ...

MIPS: MT: Remove SMTC support

2014-05-23T22:07:01+00:00

Nobody is maintaining SMTC anymore and there also seems to be no userbase.
Which is a pity - the SMTC technology primarily developed by Kevin D.
Kissell  is an ingenious demonstration for the MT
ASE's power and elegance.

Based on Markos Chandras  patch
https://patchwork.linux-mips.org/patch/6719/ which while very similar did
no longer apply cleanly when I tried to merge it plus some additional
post-SMTC cleanup - SMTC was a feature as tricky to remove as it was to
merge once upon a time.

Signed-off-by: Ralf Baechle

arch,mips: Convert smp_mb__*()

2014-04-18T12:20:38+00:00

MIPS is interesting and has hardware variants that reorder over ll/sc
as well as those that do not.

Implement the 2 new barrier functions as per the old barriers.

Signed-off-by: Peter Zijlstra 
Acked-by: Paul E. McKenney 
Link: http://lkml.kernel.org/n/tip-9ph49jbae3hol9v721sbc2g6@git.kernel.org
Cc: Linus Torvalds 
Cc: Maciej W. Rozycki" 
Cc: Ralf Baechle 
Cc: Will Deacon 
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Ingo Molnar

MIPS: Whitespace cleanup.

2013-02-01T09:00:22+00:00

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

Disintegrate asm/system.h for MIPS

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for MIPS.

Signed-off-by: David Howells 
Acked-by: Ralf Baechle 
cc: linux-mips@linux-mips.org

mips: remove needless include of module.h from core kernel files.

2011-10-31T23:30:57+00:00

None of these files are using modular infrastructure, and build
tests reveal that none of these files are really relying on any
implicit inclusions via. module.h either.  So delete them.

Signed-off-by: Paul Gortmaker