Commit Graph

118 Commits

Author SHA1 Message Date
Max Filippov a9df9338c1 xtensa: add FORCE_MAX_ZONEORDER to Kconfig
Make maximal memory allocation order configurable, so that drivers could
allocate huge buffers when they need to.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-11-03 17:19:37 +03:00
Max Filippov d951ba21b9 xtensa: nommu: select HAVE_FUTEX_CMPXCHG
Not having HAVE_FUTEX_CMPXCHG makes futex_detect_cmpxchg probe
cmpxchg_futex_value_locked with NULL address. It's not guaranteed to
fault without MMU, instead it locks up on Xtensa when there's no RAM at
address 0.

Select HAVE_FUTEX_CMPXCHG in noMMU Xtensa configurations.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-11-02 18:03:07 +03:00
Max Filippov d9eb3cb248 xtensa: nommu: fix default memory start address
RAM starts at 0x60000000 on noMMU cores, not at 0x40000000. Fix the
default.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-11-02 18:03:05 +03:00
Max Filippov 9bd46da45e xtensa: implement counting and sampling perf events
Xtensa Performance Monitor Module has up to 8 32 bit wide performance
counters. Each counter may be enabled independently and can count any
single type of hardware performance events. Event counting may be enabled
and disabled globally (per PMM).
Each counter has status register with bits indicating if the counter has
been overflown and may be programmed to raise profiling IRQ on overflow.
This IRQ is used to rewind counters and allow for counting more than 2^32
samples for counting events and to report samples for sampling events.

For more details see Tensilica Debug User's Guide, chapter 8
"Performance monitor module".

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-08-17 07:33:30 +03:00
Max Filippov db8165f5d9 xtensa: select PERF_USE_VMALLOC for cache-aliasing configurations
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-08-17 07:32:51 +03:00
Max Filippov de7c1c7862 xtensa: clean up Kconfig dependencies for custom cores
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-08-17 07:32:46 +03:00
Max Filippov c75959a6da xtensa: reimplement DMA API using common helpers
- keep existing functionality: don't handle attributes, don't support
  high memory;
- implement scatterlist primitives (map/unmap/sync);
- enable DMA API debug.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-08-17 07:31:00 +03:00
Linus Torvalds cb8a4deaf9 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
 "As usual, mostly comment, kerneldoc and printk() fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  lpfc: Grammar s/an negative/a negative/
  ARM: lib/lib1funcs.S: fix typo s/substractions/subtractions/
  cx25821: cx25821-medusa-reg.h: fix 0x0x prefix
  lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants
  rapidio: Fix kerneldoc and comment
  qla4xxx: Fix printk() in qla4_83xx_read_reset_template() and qla4_83xx_pre_loopback_config()
  treewide: Kconfig: fix wording / spelling
  usb/serial: fix grammar in Kconfig help text for FTDI_SIO
  megaraid_sas: fix kerneldoc
  netfilter: ebtables: fix comment grammar
  drm/radeon: fix comment
  isdn: fix grammar in comment
  ARM: KVM: fix comment
2015-06-23 14:08:54 -07:00
Masanari Iida 769a12a9c7 treewide: Kconfig: fix wording / spelling
This patch fix spelling typos in Kconfig.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2015-05-26 15:17:35 +02:00
Max Filippov 4949009eb8 xtensa: xtfpga: fix hardware lockup caused by LCD driver
LCD driver is always built for the XTFPGA platform, but its base address
is not configurable, and is wrong for ML605/KC705. Its initialization
locks up KC705 board hardware.

Make the whole driver optional, and its base address and bus width
configurable. Implement 4-bit bus access method.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-02-27 07:55:29 +03:00
Chris Zankel 2cb54e8493 Xtensa improvements for 3.19:
- fix permissions for kmapped pages so that copy_to_user_page works with
   them;
 - add power management menu to Kconfig to allow use of runtime PM.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJUi7VsAAoJEFH5zJH4P6BEpS8P/jsHzgGyaCmvr8MI+I6wImIt
 orEhkxOYQS4aBAi/azupTPYbu8r2I8+yscWtFxBnvJok3rT2yMtSJZFLUhur0nG4
 DQwQduMeHbzSC4ADqJBalfaOfpcwz/GQoM6IPVZEEW6h4vzCvUm0O1Wq5Z1Thbg2
 skMmVFIX2+YTwUrEKMEqbl1JevNzNH53t/tlTgiXOMkZWwL1R4ToRsFHv9zpIJ1m
 Srm0BWAXAM+h1vx1Pv2vwmTcgPj3MdBccsla/HAybeQraqThdlgAz9Cnk5T5AdWE
 6rLy9mw+LiT1kXnbl4Z526NBzvkf+5+xYiGqI3UwohhFEChq74PBPQnZlpZ2AGlG
 dI/i9CoV0uQgU3rRDvS9NNFXXW59objKIu8f2Od5pS4kgV+mPjKePVTJbchXIf5n
 MC7Dq2GcM8jK4/Q32aHNxDi9jM3jukd7pJHbyxOo0g1SpmSEnNSJ+CcOV5ft6nLB
 xIohvVXg8Om976Xbl6eRii7lNdCZm8j7mDNMl37lwaqitIgZmlGeRhAyYCnjC1Pl
 mxtORfQbGfUHw/o8TlhyINBNQdpLr0CRTL4HCrMyiDDQ0mJH3bMBKuSk7y0Qe8DG
 aJ8Om29CKvawr3irehNRsZiSfoqiPG6F/GzfFxfgSut/AKAMI25kMSoGZCjBMhHn
 76+jWe4WzygZCAUWzmsl
 =9vUt
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-for-next-20141213' of git://github.com/jcmvbkbc/linux-xtensa into for_next

Xtensa improvements for 3.19:

- fix permissions for kmapped pages so that copy_to_user_page works with
  them;
- add power management menu to Kconfig to allow use of runtime PM.
2014-12-15 20:10:39 -08:00
Max Filippov e00d8b2f44 xtensa: add power management menu to Kconfig
This allows using runtime power management feature on Xtensa.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-12-09 03:22:51 +03:00
Daniel Glöckner 4006e565e1 xtensa: remove s6000 variant and s6105 platform
The Stretch s6000 family support has been merged into mainline 5 years
ago. There appear to be no users of this code since nobody complained
that there is a merge error preventing compilation.

Apart from the s6105 IP camera reference design there are no s6000 devices
known to ever have run Linux and as the chips are out of production there
probably never will be. The successor s7000 no longer uses an Xtensa core
for the OS.

Let's remove the code until someone is found who actually needs it.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:29:01 +04:00
Max Filippov 3932b9ca55 xtensa: make PLATFORM_DEFAULT_MEM parameters configurable
This allows using xtfpga platform with both MMU and noMMU cores.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:59 +04:00
Max Filippov 2eabc1800d xtensa: nommu: set up cache and atomctl in initialize_mmu
initialize_mmu sets up atomctl SR which is needed for s32c1i to function
correctly even in noMMU configurations. It's also a good place to set up
caching attributes of physical memory.

Allow enabling INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX in noMMU
configurations for setting up atomctl and cache attributes.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:56 +04:00
Max Filippov 61e47e9b53 xtensa: xtfpga: only select ethoc when ethernet is available
Otherwise we get the following build warning:
    (XTENSA_PLATFORM_XTFPGA) selects ETHOC which has unmet direct
    dependencies (NETDEVICES && ETHERNET && HAS_IOMEM && HAS_DMA)

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06 03:23:53 +04:00
Max Filippov 7a0684cdbd xtensa: ISS: add BLOCK dependency to BLK_DEV_SIMDISK
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06 03:23:51 +04:00
Max Filippov 9184289c97 xtensa: deprecate fast_xtensa and fast_spill_registers syscalls
These syscalls are not used by userspace tools for some time now, and
they have issues when called with invalid arguments. It's not worth
changing signal delivery mechanism as we don't expect any new users for
these syscalls. Let's keep them for backwards compatibility under #ifdef,
disabled by default.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:33 +04:00
Max Filippov ad4a96b418 xtensa: remove orphan MATH_EMULATION symbol
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:12 +04:00
Max Filippov 4964527da8 xtensa: select HAVE_IDE only on platforms that may have it
HAVE_IDE is not a property of architecture but of a platform, and neither
ISS or XTFPGA support it.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:11 +04:00
Max Filippov 920f8a3965 xtensa: sort 'select' statements in Kconfig
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:10 +04:00
Max Filippov 8a9de05954 xtensa: make MMU-related configuration options depend on MMU
MMUv3 and HIGHMEM support are available only on configurations with MMU,
don't show them otherwise.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:09 +04:00
Max Filippov 420ae95184 xtensa: simplify addition of new core variants
Instead of adding new Kconfig options and Makefile rules for each new
core variant provide XTENSA_VARIANT_CUSTOM variant and record variant
name in the XTENSA_VARIANT_NAME variable. Adding new core variant now
means providing directory structure under arch/xtensa/variant and
specifying correct name in kernel configuration.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:08 +04:00
Linus Torvalds 03787ff6f9 Xtensa patchset for v3.15.
Fixes allmodconfig, allnoconfig builds
 Adds highmem support
 Enables build-time exception table sorting.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJTZ7iuAAoJEI9vqH3mFV2snKYP/AqEdj9JtWxg0MfB+mllOBmu
 nyhBW/AuVnsymy+WkOomJkxrUFAK+XTMfiOs45tdiW1dN2uJXIJ388C9pKLKtf6K
 vWzetOE6PbVusHuOQp6G+/jpjMwFZWeVvfWZ/DuvayjrAf281UENAD/4Wlmzakgw
 Qu/Qx+iQHfseMj/WdQ6N4C+zH0fjqpI6LwKkrWQ4x51tB7H9fMq9qS49BJ7WlxNg
 s+BQ44Qc71a5YZVwuH2mk8UqWRgCLYao+Ptp2z+buRmyz04kXvNWeVAHw2oSdeTr
 ug4pPPlSAdcid5fWhFOgmkvCSs1pw+fdi7honUQHmpGZRiwUdXHctlzgf4OUZjnX
 bsGeQ/klAmni8Ufgu0Ue+WIg7hvJUoE+AY7qp+Q32d0ln09FA89fitlb9WTT9zdq
 Y+6q7C/QPSqEoGe8GaLrE2o7tWqOlQ4Gd8ukbhwLNK3nInluT4PJkuknD+0s0Gmx
 Dc6+YXrUxMu+w0QoQ1aHrMVoAg4V3EtG7pFav3vW8jwhRaLO0hwEBlDPcQsAdoTt
 250FYwL3TQoKRr3+j3OfjJBuQ61PfkEPjPfqJL5htkVQ2nZKsmyGnyWUs15ZbAiT
 bxT5CLrEH7rgvM1mL86TJqEu0IEYkaEnkCMHS7EYWRL7bRRHRRkNO8HmEJIwtWa0
 0Io96EHboIFq3J+kWTnn
 =mD84
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-next-20140503' of git://github.com/czankel/xtensa-linux

Pull Xtensa fixes from Chris Zankel:
 - Fixes allmodconfig, allnoconfig builds
 - Adds highmem support
 - Enables build-time exception table sorting.

* tag 'xtensa-next-20140503' of git://github.com/czankel/xtensa-linux:
  xtensa: ISS: don't depend on CONFIG_TTY
  xtensa: xt2000: drop redundant sysmem initialization
  xtensa: add support for KC705
  xtensa: xtfpga: introduce SoC I/O bus
  xtensa: add HIGHMEM support
  xtensa: optimize local_flush_tlb_kernel_range
  xtensa: dump sysmem from the bootmem_init
  xtensa: handle memmap kernel option
  xtensa: keep sysmem banks ordered in mem_reserve
  xtensa: keep sysmem banks ordered in add_sysmem_bank
  xtensa: split bootparam and kernel meminfo
  xtensa: enable sorting extable at build time
  xtensa: export __{invalidate,flush}_dcache_range
  xtensa: Export __invalidate_icache_range
2014-05-05 15:36:59 -07:00
Max Filippov 55b441be5c xtensa: ISS: don't depend on CONFIG_TTY
Build console support only when CONFIG_TTY is selected.
This restores ISS as the default platform for allnoconfig builds.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2014-05-05 09:04:10 -07:00
Uwe Kleine-König ce816fa88c Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP
If the renamed symbol is defined lib/iomap.c implements ioport_map and
ioport_unmap and currently (nearly) all platforms define the port
accessor functions outb/inb and friend unconditionally.  So
HAS_IOPORT_MAP is the better name for this.

Consequently NO_IOPORT is renamed to NO_IOPORT_MAP.

The motivation for this change is to reintroduce a symbol HAS_IOPORT
that signals if outb/int et al are available.  I will address that at
least one merge window later though to keep surprises to a minimum and
catch new introductions of (HAS|NO)_IOPORT.

The changes in this commit were done using:

	$ git grep -l -E '(NO|HAS)_IOPORT' | xargs perl -p -i -e 's/\b((?:CONFIG_)?(?:NO|HAS)_IOPORT)\b/$1_MAP/'

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07 16:36:11 -07:00
Max Filippov 6555910065 xtensa: add HIGHMEM support
Introduce fixmap area just below the vmalloc region. Use it for atomic
mapping of high memory pages.
High memory on cores with cache aliasing is not supported and is still
to be implemented. Fail build for such configurations for now.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-04-06 21:29:21 +04:00
Max Filippov 25df8198f4 xtensa: enable sorting extable at build time
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: David Daney <ddaney.cavm@gmail.com>
2014-04-02 01:35:50 +04:00
Max Filippov bda8932d23 xtensa: support common clock framework
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-02-21 21:33:42 +04:00
Paul Bolle 4e3b4df839 xtensa: no need to select USE_GENERIC_SMP_HELPERS
Commit f615136c06 ("xtensa: add SMP support") added "select
USE_GENERIC_SMP_HELPERS". But the Kconfig symbol USE_GENERIC_SMP_HELPERS
was already removed in v3.13, so that select is a nop. Drop it.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-02-21 21:33:41 +04:00
Max Filippov 8e9356c614 xtensa: fsf: drop nonexistent GPIO32 support
The toolchain for xtensa FSF core never supported GPIO32, drop it on the
linux side too.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
2014-02-21 21:33:40 +04:00
Linus Torvalds 9b83d851a2 Xtensa patchset for 3.14-rc1
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJS4dWNAAoJEI9vqH3mFV2sargP/RCdVvdJm3TxYcNYoKAw6kTs
 wn1AWQ1vnu77YIoG2YamWytakahvB5v4Elm5UbHc49eCIFb/+wJpvxLNKbAtY0EP
 bRllFETalWnPnZO0R0tTvEikpDfzM7/OGYCjuOmTeyata6/KOxVsusTjvar28NPA
 gVp9BwHKZyk5NORkvW3RBRbfga9slUXqbg4rPhD3gFxLpe8aGuO6T6HazBfRadQM
 pI0zq2VE59LSEyuZrreHiq5EYvmp+eBFR8bJhQp1lnpKc4lMJm5JKYPY+jlPPtu0
 bPYLexjb42Gz2KbDtqLqTnd6GEPj50RS15tr9BTX9n3uCd0sIBO46K5FXVy+ALxr
 DXbyU6R1miZ01Il0A2IuC2j1cVdXb7nSytP35lLRQ9WCXua4HwQO0LL9KPAf9N0X
 WKlNPEkOr9XR9lO/1JcYVZgsygF/hHGgImf5AEfTVdtWpAj3bhMBhqFuKo0/h6vr
 7PwQCTaiL2Hks+d8YS2VyrQy3DMg48MbYmfdriJQFKKzhdyHEhvlnawP5uoIVfAC
 s43cvj6EsbUdRULf5qKDupQFJpM15qpmYiLizHFIfUTiTQGI0WMaA76rZMqZ2AsQ
 z0q2edzUV8nBQFdR74eKKPF1QJyXihiaXzug+SZqPdvXKfjPrF+5eZ7/EvuaEBZy
 qS7PIt5nkTeZ4stP/SWV
 =JT1d
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-next-20140123' of git://github.com/czankel/xtensa-linux

Pull Xtensa patches from Chris Zankel:
 "The major changes are adding support for SMP for Xtensa, fixing and
  cleaning up the ISS (simulator) network driver, and better support for
  device trees"

* tag 'xtensa-next-20140123' of git://github.com/czankel/xtensa-linux: (40 commits)
  xtensa: implement ndelay
  xtensa: clean up udelay
  xtensa: enable HAVE_PERF_EVENTS
  xtensa: remap io area defined in device tree
  xtensa: support default device tree buses
  xtensa: initialize device tree clock sources
  xtensa: xtfpga: fix definitions of platform devices
  xtensa: standardize devicetree cpu compatible strings
  xtensa: avoid duplicate of IO range definitions
  xtensa: fix ATOMCTL register documentation
  xtensa: Enable irqs after cpu is set online
  xtensa: ISS: raise network polling rate to 10 times/sec
  xtensa: remove unused XTENSA_ISS_NETWORK Kconfig parameter
  xtensa: ISS: avoid simple_strtoul usage
  xtensa: Switch to sched_clock_register()
  xtensa: implement CPU hotplug
  xtensa: add SMP support
  xtensa: add MX irqchip
  xtensa: clear timer IRQ unconditionally in its handler
  xtensa: clean up do_interrupt/do_IRQ
  ...
2014-01-25 10:49:30 -08:00
Baruch Siach a6f3eefad8 xtensa: enable HAVE_PERF_EVENTS
This allows the perf tool to monitor kernel tracepoint events.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-15 00:27:03 +04:00
Michael Opdenacker fa72e6bbad xtensa: remove unused XTENSA_ISS_NETWORK Kconfig parameter
This removes the XTENSA_ISS_NETWORK Kconfig parameter,
which was no longer used anywhere in the source code
and Makefiles.

Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-14 23:57:02 +04:00
Max Filippov 49b424feda xtensa: implement CPU hotplug
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14 10:19:59 -08:00
Max Filippov f615136c06 xtensa: add SMP support
This is largely based on SMP code from the xtensa-2.6.29-smp tree by
Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly
other Tensilica folks).

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14 10:19:58 -08:00
Max Filippov 496543c4f1 xtensa: enable HAVE_IRQ_TIME_ACCOUNTING
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14 10:19:54 -08:00
Baruch Siach a1a2bdec47 gpio: xtensa: depend on HAVE_XTENSA_GPIO32
Prevent build failure when the selected variant does not support GPIO32.

Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-01-07 18:58:19 +01:00
Martin Schwidefsky 0244ad004a Remove GENERIC_HARDIRQ config option
After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-09-13 15:09:52 +02:00
Max Filippov 478ba61afc xtensa: add static function tracer support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-07-08 01:18:57 -07:00
Baruch Siach e3f432919f xtensa: ccount based sched_clock
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-07-08 01:11:38 -07:00
Baruch Siach 925f5532e8 xtensa: ccount based clockevent implementation
Reused some code from a preliminary implementation by Max Fillippov.

Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-07-08 01:11:38 -07:00
Linus Torvalds c61c48dfe0 Xtensa patchset for v3.10-rc1
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJRi1p8AAoJEI9vqH3mFV2scb0QAJbq32y6YFWz2VGfxf5RQIWC
 QueuQ4vyDKzuGbQQQ1EvJ6WckLnp9Yu4rlVXBiYMFymWvLEM+8BPLK5ywbsMLaLm
 lDpWs2cUi6hRuEa2dYwsp260mlwAz+DvvUi+TnFN4PIarIAI+CaFevhlWtbayvg/
 TZh9vthBA2qdK8N97WbKgE4eBJgAOLdMybQPtibd9yNiYAD8r2xRqNRoy4dklliV
 Grm1G3BkDFRl+espfbNBAWd+dpxTe8Sw0N9uRf2I1G6pgx0u9i5oOEo78Ur078nc
 E6yauJlQJiogHrsEKCfX5WLWlLEgvsZx4Az4If2i///PSai4/wEDqTUZ2L390/r/
 0ui6YKr1JSVlZLYs4X893Mu+tJYJd8+fiCWXBJY5GqWg9FHzE6RHUBifkHD2DoUm
 UWjGCWtsMrcAy25rPqrVrIOlRdONVuxzp3xW7T9PkZ87r8v/RRJa4VWyWKerNPif
 Qbi/sUXD76mAOY4BisHWeOLpa9us2SOiJLqkDNB22/sH5Qdfh/pso9/BAQom+ESD
 Rfl4rgw99rzVoKiGSf3HbhRPJzghxkCwytpoh2GwvzNp+vZWqWw7AAo5uVbQP0zb
 Fg0ZtHSotCz76dp4vZn042yflPevvPc3N3O2ayC529ZB4eh+3kWfCpzHYWaEmD8e
 HV2+rc0QcUAuidJeLP7P
 =tGki
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-next-20130508' of git://github.com/czankel/xtensa-linux

Pull xtensa updates from Chris Zankel:
 "Support for the latest MMU architecture that allows for a larger
  accessible memory region, and various bug-fixes"

* tag 'xtensa-next-20130508' of git://github.com/czankel/xtensa-linux:
  xtensa: Switch to asm-generic/linkage.h
  xtensa: fix redboot load address
  xtensa: ISS: fix timer_lock usage in rs_open
  xtensa: disable IRQs while IRQ handler is running
  xtensa: enable lockdep support
  xtensa: fix arch_irqs_disabled_flags implementation
  xtensa: add irq flags trace support
  xtensa: provide custom CALLER_ADDR* implementations
  xtensa: add stacktrace support
  xtensa: clean up stpill_registers
  xtensa: don't use a7 in simcalls
  xtensa: don't attempt to use unconfigured timers
  xtensa: provide default platform_pcibios_init implementation
  xtensa: remove KCORE_ELF again
  xtensa: document MMUv3 setup sequence
  xtensa: add MMU v3 support
  xtensa: fix ibreakenable register update
  xtensa: fix oprofile building as module
2013-05-09 14:38:16 -07:00
Max Filippov 8f371c7521 xtensa: enable lockdep support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-09 01:07:11 -07:00
Max Filippov c92931b200 xtensa: add irq flags trace support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-09 01:07:11 -07:00
Max Filippov 3e4196a5cc xtensa: add stacktrace support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-09 01:07:10 -07:00
Paul Bolle 5e44fd012b xtensa: remove KCORE_ELF again
The Kconfig symbol KCORE_ELF was removed in v2.6.0, but reappeared in two
architectures. It is useless. Remove it again.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-09 01:07:09 -07:00
Max Filippov e85e335f8f xtensa: add MMU v3 support
MMUv3 comes out of reset with identity vaddr -> paddr mapping in the TLB
way 6:

Way 6 (512 MB)
        Vaddr       Paddr       ASID  Attr RWX Cache
        ----------  ----------  ----  ---- --- -------
        0x00000000  0x00000000  0x01  0x03 RWX Bypass
        0x20000000  0x20000000  0x01  0x03 RWX Bypass
        0x40000000  0x40000000  0x01  0x03 RWX Bypass
        0x60000000  0x60000000  0x01  0x03 RWX Bypass
        0x80000000  0x80000000  0x01  0x03 RWX Bypass
        0xa0000000  0xa0000000  0x01  0x03 RWX Bypass
        0xc0000000  0xc0000000  0x01  0x03 RWX Bypass
        0xe0000000  0xe0000000  0x01  0x03 RWX Bypass

This patch adds remapping code at the reset vector or at the kernel
_start (depending on CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) that
reconfigures MMUv3 as MMUv2:

Way 5 (128 MB)
        Vaddr       Paddr       ASID  Attr RWX Cache
        ----------  ----------  ----  ---- --- -------
        0xd0000000  0x00000000  0x01  0x07 RWX WB
        0xd8000000  0x00000000  0x01  0x03 RWX Bypass
Way 6 (256 MB)
        Vaddr       Paddr       ASID  Attr RWX Cache
        ----------  ----------  ----  ---- --- -------
        0xe0000000  0xf0000000  0x01  0x07 RWX WB
        0xf0000000  0xf0000000  0x01  0x03 RWX Bypass

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-09 01:07:09 -07:00
Alexandre Courbot 7fd2bf3d32 Remove GENERIC_GPIO config option
GENERIC_GPIO has been made equivalent to GPIOLIB in architecture code
and all driver code has been switch to depend on GPIOLIB. It is thus
safe to have GENERIC_GPIO removed.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
2013-04-16 18:47:19 +09:00
Stephen Rothwell 4febd95a8a Select VIRT_TO_BUS directly where needed
In commit 887cbce0ad ("arch Kconfig: centralise ARCH_NO_VIRT_TO_BUS")
I introduced the config sybmol HAVE_VIRT_TO_BUS and selected that where
needed.  I am not sure what I was thinking.  Instead, just directly
select VIRT_TO_BUS where it is needed.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-12 11:16:40 -07:00