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Add appropriate UART address definitions and support defines for using the
UARTs of the Freescale IMX50 SoC as debug ports.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The eukrea mbimxsd25 has a gpio regulator for enabling its
LCD display, it also has a gpio button.
We enable the respective drivers in order to be able to use theses
features with this configuration.
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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The PEX860X has GPIO's which are used for PCI Reset lines on the
Gateworks Ventana boards. The GPIO's need to be set as output
level high so as to allow the PCIe devices to come out of reset.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 and EFI fixes from Peter Anvin:
"Half of these are EFI-related:
The by far biggest change is the change to hold off the deletion of a
sysfs entry while a backend scan is in progress. This is to avoid
calling kmemdup() while under a spinlock.
The other major change is for each entry in the EFI pstore backend to
get a unique identifier, as required by the pstore filesystem proper.
The other changes are:
A fix to the recent consolidation and optimization of using "asm goto"
with read-modify-write operation, which broke the bitops; specifically
in such a way that we could end up generating invalid code.
A build hack to make sure we compile with -mno-sse. icc, and most
likely future versions of gcc, can generate SSE instructions unless we
tell it not to.
A comment-only patch to a change the was due in part to an unpublished
erratum; now when the erratum is published we want to add a comment
explaining why"
* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic, doc: Justification for disabling IO APIC before Local APIC
x86, bitops: Correct the assembly constraints to testing bitops
x86-64, build: Always pass in -mno-sse
efi-pstore: Make efi-pstore return a unique id
x86/efi: Fix earlyprintk off-by-one bug
efivars, efi-pstore: Hold off deletion of sysfs entry until the scan is completed
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Since erratum AVR31 in "Intel Atom Processor C2000 Product Family
Specification Update" is now published, I added a justification
comment for disabling IO APIC before Local APIC, as changed in commit:
522e66464467 x86/apic: Disable I/O APIC before shutdown of the local APIC
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1386202069-51515-1-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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In checkin:
0c44c2d0f459 x86: Use asm goto to implement better modify_and_test() functions
the various functions which do modify and test were unified and
optimized using "asm goto". However, this change missed the detail
that the bitops require an "Ir" constraint rather than an "er"
constraint ("I" = integer constant from 0-31, "e" = signed 32-bit
integer constant). This would cause code to miscompile if these
functions were used on constant bit positions 32-255 and the build to
fail if used on constant bit positions above 255.
Add the constraints as a parameter to the GEN_BINARY_RMWcc() macro to
avoid this problem.
Reported-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/529E8719.4070202@zytor.com
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Another batch of fixes for ARM SoCs for 3.13. The diffstat is large,
mostly because of:
- Another set of fixes to fix regressions caused by moving OMAP from
board files to DT. Tony thinks this was the last major set of
fixes, with maybe just a few small patches to follow.
- More fixes for Marvell platforms, most dealing with misdescribed
PCIe hardware, i.e. incorrect number of busses on some SoCs, etc.
The line delta adds up due to various ranges moving around when
this is fixed.
But there's also:
- Some smaller tweaks to defconfigs to make more boards bootable in
my test setup for better coverage.
- There are also a few other smaller fixes, a short series for at91,
a couple of reverts for ux500, etc"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
arm: dts: socfpga: Change some clocks of gate-clk type to perip-clk
arm: socfpga: Enable ARM_TWD for socfpga
ARM: multi_v7_defconfig: enable SDHCI_BCM_KONA and MMC_BLOCK_MINORS=16
ARM: sunxi_defconfig: enable NFS, TMPFS, PRINTK_TIME and nfsroot support
ARM: multi_v7_defconfig: enable network for BeagleBone Black
ARM: dts: Fix the name of supplies for smsc911x shared by OMAP
ARM: OMAP2+: Powerdomain: Fix unchecked dereference of arch_pwrdm
ARM: dts: omap3-beagle: Add omap-twl4030 audio support
ARM: dts: omap4-sdp: Fix pin muxing for wl12xx
ARM: dts: omap4-panda-common: Fix pin muxing for wl12xx
ARM: at91: fixed unresolved symbol "at91_pm_set_standby" when built without CONFIG_PM
ARM: at91: add usart3 alias to dtsi
ARM: at91: sama5d3: reduce TWI internal clock frequency
mmc: omap: Fix I2C dependency and make driver usable with device tree
mmc: omap: Fix DMA configuration to not rely on device id
ARM: dts: omap3-beagle: Fix USB host on beagle boards (for 3.13)
ARM: dts: omap3-igep0020: name twl4030 VPLL2 regulator as vdds_dsi
ARM: dts: AM33XX IGEP0033: add USB support
ARM: dts: AM33XX BASE0033: add 32KBit EEPROM support
ARM: dts: AM33XX BASE0033: add pinmux and user led support
...
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parsic updates from Helge Deller:
- a fix for the mmap(MAP_FIXED|MAP_SHARED) syscall to the same address
which was already given in a previous call (fixes locale-gen on
debian)
- change the memory layout of the kernel to avoid the need for the
-mlong-calls compiler option (depends on commit 5ecbe3c3c690 -
"kernel/extable: fix address-checks for core_kernel and init areas")
- defconfig updates, e.g. use the SIL680 driver instead of the SIIMAGE
driver
- add more parisc machine names to the machine database
* 'parisc-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: update 64bit defconfigs and use SIL680 instead of SIIMAGE driver
parisc: remove CONFIG_MLONGCALLS=y from defconfigs
parisc: fix kernel memory layout in vmlinux.ld.S
parisc: use kernel_text_address() in unwind functions
parisc: remove empty SERIAL_PORT_DFNS in serial.h
parisc: add some more machine names to hardware database
parisc: fix mmap(MAP_FIXED|MAP_SHARED) to already mmapped address
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Pull crypto fixes from Herbert Xu:
"This push fixes a number of crashes triggered by a previous crypto
self-test update. It also fixes a build problem in the caam driver,
as well as a concurrency issue in s390.
Finally there is a pair of fixes to bugs in the crypto scatterwalk
code and authenc that may lead to crashes"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: testmgr - fix sglen in test_aead for case 'dst != src'
crypto: talitos - fix aead sglen for case 'dst != src'
crypto: caam - fix aead sglen for case 'dst != src'
crypto: ccm - Fix handling of zero plaintext when computing mac
crypto: s390 - Fix aes-xts parameter corruption
crypto: talitos - corrrectly handle zero-length assoc data
crypto: scatterwalk - Set the chain pointer indication bit
crypto: authenc - Find proper IV address in ablkcipher callback
crypto: caam - Add missing Job Ring include
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
- timekeeping: Cure a subtle drift issue on GENERIC_TIME_VSYSCALL_OLD
- nohz: Make CONFIG_NO_HZ=n and nohz=off command line option behave the
same way. Fixes a long standing load accounting wreckage.
- clocksource/ARM: Kconfig update to avoid ARM=n wreckage
- clocksource/ARM: Fixlets for the AT91 and SH clocksource/clockevents
- Trivial documentation update and kzalloc conversion from akpms pile
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
nohz: Fix another inconsistency between CONFIG_NO_HZ=n and nohz=off
time: Fix 1ns/tick drift w/ GENERIC_TIME_VSYSCALL_OLD
clocksource: arm_arch_timer: Hide eventstream Kconfig on non-ARM
clocksource: sh_tmu: Add clk_prepare/unprepare support
clocksource: sh_tmu: Release clock when sh_tmu_register() fails
clocksource: sh_mtu2: Add clk_prepare/unprepare support
clocksource: sh_mtu2: Release clock when sh_mtu2_register() fails
ARM: at91: rm9200: switch back to clockevents_config_and_register
tick: Document tick_do_timer_cpu
timer: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)
NOHZ: Check for nohz active instead of nohz enabled
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Always pass in the -mno-sse argument, regardless if
-preferred-stack-boundary is supported. We never want to generate SSE
instructions in the kernel unless we *really* know what we're doing.
According to H. J. Lu, any version of gcc new enough that we support
it at all should handle the -mno-sse option, so just add it
unconditionally.
Reported-by: Kevin B. Smith <kevin.b.smith@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: H. J. Lu <hjl.tools@gmail.com>
Link: http://lkml.kernel.org/n/tip-j21wzqv790q834n7yc6g80j1@git.kernel.org
Cc: <stable@vger.kernel.org> # build fix only
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Signed-off-by: Helge Deller <deller@gmx.de>
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Some of the clocks that were designated gate-clk do not have a gate, so
change those clocks to be of periph-clk type.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Update Kconfig to enable TWD.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Enable MMC/SD on the Broadcom mobile platforms, and increase the block
minors from the default 8 to 16 (since the Broadcom board by default
has root on the 8th partition).
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: stable@vger.kernel.org # v3.12
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This enables a few more options on the sunxi defconfigs such that I can
use nfsroot to boot them (there is no local storage support yet). It
also enables PRINTK_TIME and tmpfs since it's a common distro requirement.
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
From Tony Lindgren:
Few more legacy booting vs device tree booting fixes that people
have noticed while booting things with device tree for things like
omap4 WLAN, smsc911x, and beagle audio. Hopefully this will be it
for the legacy booting vs device tree fixes for this -rc cycle.
* tag 'omap-for-v3.13/more-dt-regressions' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: Fix the name of supplies for smsc911x shared by OMAP
ARM: OMAP2+: Powerdomain: Fix unchecked dereference of arch_pwrdm
ARM: dts: omap3-beagle: Add omap-twl4030 audio support
ARM: dts: omap4-sdp: Fix pin muxing for wl12xx
ARM: dts: omap4-panda-common: Fix pin muxing for wl12xx
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BeagleBone Black uses the TI CPSW ethernet controller, enable it in the
multi_v7_defconfig for testing coverage purposes.
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: stable@vger.kernel.org # v3.12
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From Nicolas Ferre:
AT91: second round of fixes for 3.13
- reduce IP frequency for I2C on sama5d3
- missing aliases directive for USART3 on 9x5 family
- a PM symbol is missing if !CONFIG_PM
* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
ARM: at91: fixed unresolved symbol "at91_pm_set_standby" when built without CONFIG_PM
ARM: at91: add usart3 alias to dtsi
ARM: at91: sama5d3: reduce TWI internal clock frequency
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fixes
From Jason Cooper, mvebu DT fixes for v3.13:
- mvebu
- PCIe fixes now that we have test devices with more ports.
- fix access to coherency registers
* tag 'mvebu-dt-fixes-3.13' of git://git.infradead.org/linux-mvebu:
ARM: mvebu: re-enable PCIe on Armada 370 DB
ARM: mvebu: use the virtual CPU registers to access coherency registers
ARM: mvebu: fix second and third PCIe unit of Armada XP mv78260
ARM: mvebu: second PCIe unit of Armada XP mv78230 is only x1 capable
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
From Tony Lindgren:
Some omap related fixes that have come up with people moving to device
tree only based booting for omap2+.
The series contains a handful of fixes for the igep boards as they were
one of the first omap3 boards to jump over completely to device tree
based booting. So these can be considered regressions compared to
booting igep in legacy mode with board files in v3.12.
Also included are few other device tree vs legacy booting regressions:
- yet more missing omap3 .dtsi entries that have showed up booting
various boards with device tree only
- n900 eMMC device tree fix
- fixes for beagle USB EHCI
- two fixes to make omap2420 MMC work
As we're moving omap2+ to be device tree only for v3.14, I'd like to
have v3.13 work equally well for legacy based booting and device tree
based booting. So there will be likely few more device tree related
booting patches trickling in.
This series also includes a regression fix for the omap timer posted
mode that may wrongly stay on from the bootloader for some SoCs.
* tag 'omap-for-v3.13/fixes-against-rc1-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
mmc: omap: Fix I2C dependency and make driver usable with device tree
mmc: omap: Fix DMA configuration to not rely on device id
ARM: dts: omap3-beagle: Fix USB host on beagle boards (for 3.13)
ARM: dts: omap3-igep0020: name twl4030 VPLL2 regulator as vdds_dsi
ARM: dts: AM33XX IGEP0033: add USB support
ARM: dts: AM33XX BASE0033: add 32KBit EEPROM support
ARM: dts: AM33XX BASE0033: add pinmux and user led support
ARM: dts: AM33XX BASE0033: add pinmux and hdmi node to enable display
ARM: dts: omap3-igep0020: Add pinmuxing for DVI output
ARM: dts: omap3-igep0020: Add pinmux setup for i2c devices
ARM: dts: omap3-igep: Update to use the TI AM/DM37x processor
ARM: dts: omap3-igep: Add support for LBEE1USJYC WiFi connected to SDIO
ARM: dts: omap3-igep: Fix bus-width for mmc1
ARM: OMAP2+: dss-common: change IGEP's DVI DDC i2c bus
ARM: OMAP2+: Disable POSTED mode for errata i103 and i767
ARM: OMAP2+: Fix eMMC on n900 with device tree
ARM: OMAP2+: Add fixed regulator to omap2plus_defconfig
ARM: OMAP2+: Fix more missing data for omap3.dtsi file
Signed-off-by: Olof Johansson <olof@lixom.net>
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drivers/net/ethernet/smsc/smsc911x.c is expecting supplies named
"vdd33a" and "vddvario". Currently the shared DTS file provides
"vmmc" and "vmmc_aux", and the supply lookup will fail:
smsc911x 2c000000.ethernet: Looking up vdd33a-supply from device tree
smsc911x 2c000000.ethernet: Looking up vdd33a-supply property in node /ocp/gpmc@6e000000/ethernet@gpmc failed
smsc911x 2c000000.ethernet: Looking up vddvario-supply from device tree
smsc911x 2c000000.ethernet: Looking up vddvario-supply property in node /ocp/gpmc@6e000000/ethernet@gpmc failed
Fix it!
Looks like commmit 6b2978ac40e4 (ARM: dts: Shared file for omap GPMC
connected smsc911x) made the problem more visible by moving the smc911x
configuration from the omap3-igep0020.dts file to the generic file.
But it seems we've had this problem since commit d72b4415011e
(ARM: dts: omap3-igep0020: Add SMSC911x LAN chip support).
Tested on OMAP3 Overo platform.
Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
[tony@atomide.com: updated comments for the commits causing the problem]
Signed-off-by: Tony Lindgren <tony@atomide.com>
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Commit 'cd8abed' "ARM: OMAP2+: Powerdomain: Remove the need to
always have a voltdm associated to a pwrdm" leads to the following
Smatch complaint:
arch/arm/mach-omap2/powerdomain.c:131 _pwrdm_register()
error: we previously assumed 'arch_pwrdm' could be null (see line 105)
So, fix the unchecked dereference of arch_pwrdm.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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This adds typical McBSP2-TWL4030 audio description to the legacy
Beagle Board.
Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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Mux mode for wlan/sdmmc5 should be MODE0 in pinmux_wl12xx_pins and
Enable Pull up on sdmmc5_clk to detect SDIO card.
This fixes WLAN on omap4-sdp that got broken in v3.10 when we
moved omap4 to boot using device tree only as I did not have
the WL12XX card in my omap4 SDP to test with. The commit that
attempted to make WL12XX working on omap4 SDP was 775d2418f309
(ARM: dts: Fix muxing and regulator for wl12xx on the SDIO
bus for blaze).
Signed-off-by: Balaji T K <balajitk@ti.com>
[tony@atomide.com: updated comments for the regression]
Signed-off-by: Tony Lindgren <tony@atomide.com>
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pin mux wl12xx_gpio and wl12xx_pins should be part of omap4_pmx_core
and not omap4_pmx_wkup. So, move wl12xx_* to omap4_pmx_core.
Fix the following error message:
pinctrl-single 4a31e040.pinmux: mux offset out of range: 0x38 (0x38)
pinctrl-single 4a31e040.pinmux: could not add functions for pinmux_wl12xx_pins 56x
SDIO card is not detected after moving pin mux to omap4_pmx_core since
sdmmc5_clk pull is disabled. Enable Pull up on sdmmc5_clk to detect SDIO card.
This fixes a regression where WLAN did not work after a warm reset
or after one up/down cycle that happened when we move omap4 to boot
using device tree only. For reference, the kernel bug is described at:
https://bugzilla.kernel.org/show_bug.cgi?id=63821
Cc: stable@vger.kernel.org # v3.10+
Signed-off-by: Balaji T K <balajitk@ti.com>
[tony@atomide.com: update comments to describe the regression]
Signed-off-by: Tony Lindgren <tony@atomide.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Misc kernel and tooling fixes"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tools lib traceevent: Fix conversion of pointer to integer of different size
perf/trace: Properly use u64 to hold event_id
perf: Remove fragile swevent hlist optimization
ftrace, perf: Avoid infinite event generation loop
tools lib traceevent: Fix use of multiple options in processing field
perf header: Fix possible memory leaks in process_group_desc()
perf header: Fix bogus group name
perf tools: Tag thread comm as overriden
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
"Fixes to patches that went in this merge window along with a latent
bug:
- Fix lazy flushing in case m2p override fails.
- Fix module compile issues with ARM/Xen
- Add missing call to DMA map page for Xen SWIOTLB for ARM"
* tag 'stable/for-linus-3.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
xen/arm: p2m_init and p2m_lock should be static
arm/xen: Export phys_to_mach to fix Xen module link errors
swiotlb-xen: add missing xen_dma_map_page call
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CONFIG_PM
If CONFIG_PM is not defined, then arch/arm/mach-at91/pm.c is not
compiled in. This patch creates an inline function that does nothing
if CONFIG_PM is not defined.
Signed-off-by: Brent Taylor <motobud@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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Alias was missing for SoC of the at91sam9x5 familly that embed USART3.
Reported-by: Jiri Prchal <jiri.prchal@aksignal.cz>
[b.brezillon@overkiz.com: advised to place changes in at91sam9x5_usart3.dtsi]
Acked-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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With some devices, transfer hangs during I2C frame transmission. This issue
disappears when reducing the internal frequency of the TWI IP. Even if it is
indicated that internal clock max frequency is 66MHz, it seems we have
oversampling on I2C signals making TWI believe that a transfer in progress
is done.
This fix has no impact on the I2C bus frequency.
Cc: <stable@vger.kernel.org> #3.10+
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
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Pull UML fixes from Richard Weinberger:
"Fixes two regressions which got introduced this merge window"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Build always with -mcmodel=large on 64bit
um: Rename print_stack_trace to do_stack_trace
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Pull ARM fixes from Russell King:
"Some ARM fixes, the biggest of which is the fix for the signal return
codes; this came up due to an interaction between the V7M nommu
changes and the BE8 changes. Dave Martin spotted that the kexec
trampoline wasn't being correctly copied (in a way which allows
Thumb-2 to work).
I've also fixed a number of breakages on footbridge platforms as I've
upgraded one of my machines to v3.12... one which had a 1200 day
uptime"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 7907/1: lib: delay-loop: Add align directive to fix BogoMIPS calculation
ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel
ARM: 7895/1: signal: fix armv7-m build issue in sigreturn_codes.S
ARM: footbridge: fix EBSA285 LEDs
ARM: footbridge: fix VGA initialisation
ARM: fix booting low-vectors machines
ARM: dma-mapping: check DMA mask against available memory
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On UML SUBARCH can be x86, x86_64 and i386 and if it is x86
we use uname -m to select a defconfig.
Therefore we can no longer use -mcmodel=large only if SUBARCH
is x86_64.
Reported-and-tested-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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We cannot use print_stack_trace because the name conflicts
with linux/stacktrace.h.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Currently mx53 (CortexA8) running at 1GHz reports:
Calibrating delay loop... 663.55 BogoMIPS (lpj=3317760)
Tom Evans verified that alignments of 0x0 and 0x8 run the two instructions of __loop_delay in one clock cycle (1 clock/loop), while alignments of 0x4 and 0xc take 3 clocks to run the loop twice. (1.5 clock/loop)
The original object code looks like this:
00000010 <__loop_const_udelay>:
10: e3e01000 mvn r1, #0
14: e51f201c ldr r2, [pc, #-28] ; 0 <__loop_udelay-0x8>
18: e5922000 ldr r2, [r2]
1c: e0800921 add r0, r0, r1, lsr #18
20: e1a00720 lsr r0, r0, #14
24: e0822b21 add r2, r2, r1, lsr #22
28: e1a02522 lsr r2, r2, #10
2c: e0000092 mul r0, r2, r0
30: e0800d21 add r0, r0, r1, lsr #26
34: e1b00320 lsrs r0, r0, #6
38: 01a0f00e moveq pc, lr
0000003c <__loop_delay>:
3c: e2500001 subs r0, r0, #1
40: 8afffffe bhi 3c <__loop_delay>
44: e1a0f00e mov pc, lr
After adding the 'align 3' directive to __loop_delay (align to 8 bytes):
00000010 <__loop_const_udelay>:
10: e3e01000 mvn r1, #0
14: e51f201c ldr r2, [pc, #-28] ; 0 <__loop_udelay-0x8>
18: e5922000 ldr r2, [r2]
1c: e0800921 add r0, r0, r1, lsr #18
20: e1a00720 lsr r0, r0, #14
24: e0822b21 add r2, r2, r1, lsr #22
28: e1a02522 lsr r2, r2, #10
2c: e0000092 mul r0, r2, r0
30: e0800d21 add r0, r0, r1, lsr #26
34: e1b00320 lsrs r0, r0, #6
38: 01a0f00e moveq pc, lr
3c: e320f000 nop {0}
00000040 <__loop_delay>:
40: e2500001 subs r0, r0, #1
44: 8afffffe bhi 40 <__loop_delay>
48: e1a0f00e mov pc, lr
4c: e320f000 nop {0}
, which now reports:
Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736)
Some more test results:
On mx31 (ARM1136) running at 532 MHz, before the patch:
Calibrating delay loop... 351.43 BogoMIPS (lpj=1757184)
On mx31 (ARM1136) running at 532 MHz after the patch:
Calibrating delay loop... 528.79 BogoMIPS (lpj=2643968)
Also tested on mx6 (CortexA9) and on mx27 (ARM926), which shows the same
BogoMIPS value before and after this patch.
Reported-by: Tom Evans <tom_usenet@optusnet.com.au>
Suggested-by: Tom Evans <tom_usenet@optusnet.com.au>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Copying a function with memcpy() and then trying to execute the
result isn't trivially portable to Thumb.
This patch modifies the kexec soft restart code to copy its
assembler trampoline relocate_new_kernel() using fncpy() instead,
so that relocate_new_kernel can be in the same ISA as the rest of
the kernel without problems.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reported-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Tested-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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After "ARM: signal: sigreturn_codes should be endian neutral to
work in BE8" commit, thumb only platforms, like armv7m, fails to
compile sigreturn_codes.S. The reason is that for such arch
values '.arm' directive and arm opcodes are not allowed.
Fix conditionally enables arm opcodes only if no CONFIG_CPU_THUMBONLY
defined and it uses .org instructions to keep sigreturn_codes
layout.
Suggested-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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- The LEDs register is write-only: it can't be read-modify-written.
- The LEDs are write-1-for-off not 0.
- The check for the platform was inverted.
Fixes: cf6856d693dd ("ARM: mach-footbridge: retire custom LED code")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: stable@vger.kernel.org
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Signed-off-by: Helge Deller <deller@gmx.de>
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When building a 64bit kernel sometimes functions in the .init section were not
able to reach the standard kernel function. Main reason for this problem is,
that the linkage tables (.plt, .opd, .dlt) tend to become pretty huge and thus
the distance gets too big for short calls.
One option to avoid this is to use the -mlong-calls compiler option, but this
increases the binary size and introduces a performance penalty.
Instead, with this patch we just lay out the binary differently. Init code is
stored first, followed by text, R/O and finally R/W data. This means, that init
and text code is now much closer to each other, which is sufficient to reach
each other by short calls.
Signed-off-by: Helge Deller <deller@gmx.de>
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Signed-off-by: Helge Deller <deller@gmx.de>
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If architectures don't support SERIAL_PORT_DFNS, they need not define it
to "nothing", the related drivers need do it by themselves (e.g. 8250
serial driver).
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Helge Deller <deller@gmx.de>
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Sadly the correct names for machines which end with a question-mark aren't
known, so let's give it a best-guessed-name.
Signed-off-by: Helge Deller <deller@gmx.de>
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locale-gen on Debian showed a strange problem on parisc:
mmap2(NULL, 536870912, PROT_NONE, MAP_SHARED, 3, 0) = 0x42a54000
mmap2(0x42a54000, 103860, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0) = -1 EINVAL (Invalid argument)
Basically it was just trying to re-mmap() a file at the same address
which it was given by a previous mmap() call. But this remapping failed
with EINVAL.
The problem is, that when MAP_FIXED and MAP_SHARED flags were used, we didn't
included the mapping-based offset when we verified the alignment of the given
fixed address against the offset which we calculated it in the previous call.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # 3.10+
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It's no good setting vga_base after the VGA console has been
initialised, because if we do that we get this:
Unable to handle kernel paging request at virtual address 000b8000
pgd = c0004000
[000b8000] *pgd=07ffc831, *pte=00000000, *ppte=00000000
0Internal error: Oops: 5017 [#1] ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0+ #49
task: c03e2974 ti: c03d8000 task.ti: c03d8000
PC is at vgacon_startup+0x258/0x39c
LR is at request_resource+0x10/0x1c
pc : [<c01725d0>] lr : [<c0022b50>] psr: 60000053
sp : c03d9f68 ip : 000b8000 fp : c03d9f8c
r10: 000055aa r9 : 4401a103 r8 : ffffaa55
r7 : c03e357c r6 : c051b460 r5 : 000000ff r4 : 000c0000
r3 : 000b8000 r2 : c03e0514 r1 : 00000000 r0 : c0304971
Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel
which is an access to the 0xb8000 without the PCI offset required to
make it work.
Fixes: cc22b4c18540 ("ARM: set vga memory base at run-time")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: <stable@vger.kernel.org>
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Commit f6f91b0d9fd9 (ARM: allow kuser helpers to be removed from the
vector page) required two pages for the vectors code. Although the
code setting up the initial page tables was updated, the code which
allocates page tables for new processes wasn't, neither was the code
which tears down the mappings. Fix this.
Fixes: f6f91b0d9fd9 ("ARM: allow kuser helpers to be removed from the vector page")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: <stable@vger.kernel.org>
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Some buses have negative offsets, which causes the DMA mask checks to
falsely fail. Fix this by using the actual amount of memory fitted in
the system.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull ARM64 fixes from Catalin Marinas:
- Remove preempt_count modifications in the arm64 IRQ handling code
since that's already dealt with in generic irq_enter/irq_exit
- PTE_PROT_NONE bit moved higher up to avoid overlapping with the
hardware bits (for PROT_NONE mappings which are pte_present)
- Big-endian fixes for ptrace support
- Asynchronous aborts unmasking while in the kernel
- pgprot_writecombine() change to create Normal NonCacheable memory
rather than Device GRE
* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
arm64: Move PTE_PROT_NONE higher up
arm64: Use Normal NonCacheable memory for writecombine
arm64: debug: make aarch32 bkpt checking endian clean
arm64: ptrace: fix compat registes get/set to be endian clean
arm64: Unmask asynchronous aborts when in kernel mode
arm64: dts: Reserve the memory used for secondary CPU release address
arm64: let the core code deal with preempt_count
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky:
"One performance improvement and a few bug fixes. Two of the fixes
deal with the clock related problems we have seen on recent kernels"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/mm: handle asce-type exceptions as normal page fault
s390,time: revert direct ktime path for s390 clockevent device
s390/time,vdso: convert to the new update_vsyscall interface
s390/uaccess: add missing page table walk range check
s390/mm: optimize copy_page
s390/dasd: validate request size before building CCW/TCW request
s390/signal: always restore saved runtime instrumentation psw bit
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