The kernel currently only supports broadcasting of the timer interrupt
from a single timer, not multicasting into two multicast groups of
processors. So the implemented mechanism for SMTC works by broadcasting
the cp0 compare interrupt on VPE 0 and ignoring it on any additional VPEs.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This replaces the MIPS-specific to_tm function with the generic
rtc_time_to_tm function. The big difference between the two functions is
that rtc_time_to_tm uses epoch 70 while to_tm uses 1970, so the result of
rtc_time_to_tm needs to be fixed up.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Hard to follow who is pointing what to where and why so it's simply getting
in the way of the time code renovation.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This has not been any serious user of this ill conceived thing since the
original invention in like '95.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Add LED support to the WGT634U machine. It uses the new gpio-led
driver and a platform driver for the pin definitions.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Add GPIO support to the BCM47XX platform. It will be used by a GPIO
LED driver.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Add CFE support to the BCM47XX code. That includes querying CFE environment
variables as well as using CFE to print messages before the serial port is
initialized (early printk).
Signed-off-by: Aurelien Jarno <aurel32@farad.aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Move the platform independent part of the CFE code to arch/mips/fw/cfe from
arch/mips/sibyte/cfe.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
It may not be perfect yet but the SB1 code is badly borken and has
horrible performance issues.
Downside: This seriously breaks support for pass 1 parts of the BCM1250
where indexed cacheops don't work quite reliable but I seem to be the
last one on the planet with a pass 1 part anyway.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Match the R4000 semantics for the initial state of interrupt/kernel
status register flags for the R3000 in kernel_thread().
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This style will be consitent with all other arch's - soon.
In addition:
- Moved a few labels inside brackets for the sections they specify
to prevent that linker alignmnet made them point before the section start
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
o Move i8259 function declarations to include/asm-mips/i8259.h
o Make i8259.c functions static where possible.
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Note that the BCM4710 does not support the wait instruction, this
is not a mistake in the code.
It originally comes from the OpenWrt patches.
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Florian Schirmer <jolt@tuxbox.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This patch renames it for 3 reasons:
- "CONFIG" pattern is used by Kconfig. Now this macro is
no more defined by Kconfig but by Kbuild itself make this
clear by translating "CONFIG" into "KBUILD".
- "ELF32" word is improper because it is irrelevant to ELF
format and it makes confusion with CONFIG_BOOT_ELF32. So
translate it with SYM32.
- Add "64BIT" part to make clear that this macro implies a
64 bits kernel.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
We do not rely on user anymore to setup this config correctly.
Instead we make our choice depending on the load address.
If we want to force Kbuild to use ELF64 format whatever
the load address we can still do:
$ make BUILD_ELF32=no
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This patch removes '-mno-explicit-relocs' usage when
CONFIG_BUILD_ELF64 is set since this option was only required
with the old hack to truncate addresses at the assembly level
where "-mabi=64 -Wa,-mabi=32" was used.
This should yield a small code size improvement for inline
assembly, where the R constraint is used.
The idea is coming from Maciej <macro@linux-mips.org>.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Convert the corgi backlight driver to a more generic version
so it can be reused by other code rather than being Zaurus/PXA
specific.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
This patch adds basic support for the new 405EX and the AMCC eval board
Kilauea to arch/powerpc.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
All ppc32 systems except PReP and 8xx are capable of handling 3G of user
address space. Old legacy had set this to 2GB and no one has bothered to
fix it.
8xx could be bumped up to 3GB if its SW TLB miss handlers were fixed up
to properly determine kernel/user addresses.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Move to using PAGE_OFFSET instead of TASK_SIZE or KERNELBASE value on
6xx/40x/44x/fsl-booke to determine if the faulting address is a kernel or
user space address. This mimics how the macro is_kernel_addr() works.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
asm-powerpc/mpc85xx.h was really a hold over from arch/ppc. Now that
more decoupling has occurred we can remove <asm/mpc85xx.h> and some of
its legacy.
As part of this we moved the definition of CPM_MAP_ADDR into cpm2.h
for 85xx platforms. This is a stop gap until drivers stop using
CPM_MAP_ADDR.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
We don't use any CPM devices on these boards, but the muram node on these
chips is different from the 8560, so it's helpful to people working with
custom boards based on these chips.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
In testing the new clocksource and clockevent code on a PPC601
processor, I discovered that the clockevent multiplier value for the
decrementer clockevent was overflowing. Because the RTCL register in
the 601 effectively counts at 1GHz (it doesn't actually, but it
increases by 128 every 128ns), and the shift value was 32, that meant
the multiplier value had to be 2^32, which won't fit in an unsigned
long on 32-bit. The same problem would arise on any platform where
the timebase frequency was 1GHz or more (not that we actually have any
such machines today).
This fixes it by reducing the shift value to 16. Doing the
calculations with a resolution of 2^-16 nanoseconds (15 femtoseconds)
should be quite adequate. :)
Signed-off-by: Paul Mackerras <paulus@samba.org>
On old powermacs, we sometimes set the decrementer to 1 in order to
trigger a decrementer interrupt, which we use to handle an interrupt
that was pending at the time when it was re-enabled. This was causing
the decrementer clock event device to call the event function for the
next event early, which was causing problems when high-res timers were
not enabled.
This fixes the problem by recording the timebase value at which the
next event should occur, and checking the current timebase against the
recorded value in timer_interrupt. If it isn't time for the next
event, it just reprograms the decrementer and returns.
This also subtracts 1 from the value stored into the decrementer,
which is appropriate because the decrementer interrupts on the
transition from 0 to -1, not when the decrementer reaches 0.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Some IBM machines supply a "logical" PVR (processor version register)
value in the device tree in the cpu nodes rather than the real PVR.
This is used for instance to indicate that the processors in a POWER6
partition have been configured by the hypervisor to run in POWER5+
mode rather than POWER6 mode. To cope with this, we call identify_cpu
a second time with the logical PVR value (the first call is with the
real PVR value in the very early setup code).
However, POWER5+ machines can also supply a logical PVR value, and use
the same value (the value that indicates a v2.04 architecture
compliant processor). This causes problems for code that uses the
performance monitor (such as oprofile), because the PMU registers are
different in POWER6 (even in POWER5+ mode) from the real POWER5+.
This change works around this problem by taking out the PMU
information from the cputable entries for the logical PVR values, and
changing identify_cpu so that the second call to it won't overwrite
the PMU information that was established by the first call (the one
with the real PVR), but does update the other fields. Specifically,
if the cputable entry for the logical PVR value has num_pmcs == 0,
none of the PMU-related fields get used.
So that we can create a mixed cputable entry, we now make cur_cpu_spec
point to a single static struct cpu_spec, and copy stuff from
cpu_specs[i] into it. This has the side-effect that we can now make
cpu_specs[] be initdata.
Ultimately it would be good to move the PMU-related fields out to a
separate structure, pointed to by the cputable entries, and change
identify_cpu so that it saves the PMU info pointer, copies the whole
structure, and restores the PMU info pointer, rather than identify_cpu
having to list all the fields that are *not* PMU-related.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
As explained on:
http://www.avrfreaks.net/index.php?nameÿphpBB2&fileÿewtopic&tS307
If the current process is preempted before it can copy RAR_SUP and
RSR_SUP both register are lost and the process will segfault as soon
as it return from the syscall since the return adress will be
corrupted.
This patch disable IRQ as soon as we enter the syscall path and
reenable them when the copy is done.
In the interrupt handlers, check if we are interrupting the srrf
instruction, if so disable interrupts and return. The interrupt
handler will be re-called immediatly when the interrupts are
reenabled.
After some stressing workload:
- find / > /dev/null in loop
- top (in ssh)
- ping -f avr32
The segfaults are not seen anymore.
Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Make the NGW100 bitbang i2c use open drain signaling.
Also, speed it up, so it's closer to 100 kHz ... the code paths seem
to be long enough that the udelay isn't dominating bit times. The
peak bit rate I observed was around 125 kHz, but that's with large
delays (usually before ACK/NAK) which hold the overall rate down to
around 80 kHz (call it 100 usec/byte on average).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This patch makes the SMC configuration take timings in clock cycles
instead of nanoseconds. A function to calculate timings in clock
cycles is added.
This patch removes the rounding troubles of the previous SMC
configuration method.
[hskinnemoen@atmel.com: fix atstk1002/atngw100 flash config]
Signed-off-by: Kristoffer Nyborg Gregertsen <gregerts@stud.ntnu.no>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Don't allow cpu hotplug on systems lacking XICS interrupt controller
(i.e. with an MPIC interrupt controller), since the current pSeries
platform code is hardcoded for XICS.
This works around the bug reported by Paul Mackerras where the
disable_nonboot_cpus() call recently added to the shutdown path will
cause an oops on older pSeries machines.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
We no longer initialise the name and owner fields of the
of_platform_driver, but use the fields of the embedded device_driver's
name field instead.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This way we only have entries in the device tree for disks that actually
exist. A slight complication is that disks may be attached to LPARs
at runtime.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Now we will only have entries in the device tree for the actual existing
devices (including their OS/400 properties). This way viotape.c gets
all the information about the devices from the device tree.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Now we will only have entries in the device tree for the actual existing
devices (including their OS/400 properties). This way viocd.c gets all
the information about the devices from the device tree.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
It was only being used to carry around dma_iommu_ops and vio_iommu_table
which we can use directly instead. This also means that vio_bus_device
doesn't need to refer to them either.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Remove vio_dma_ops declaration (since it no longer exists) and some
unused fields from struct vio_driver.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
There is no good reason for board platform code to mess with the
ROOT_DEV. Remove it from all in-tree platforms except powermac.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This allows platforms which don't have anything to do at setup_arch time
(like a bunch of the 4xx platforms) to eliminate an empty setup_arch hook.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Given the existing "retain_initrd" boot-time parameter defined in
init/initramfs.c, there appears to be no need for the equivalent
"keepinitrd" parameter.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
__init_end, which comes immediately before .text, is already page
aligned, and that should be more than enough for the .text section.
The reason why we need to align the .text section is because the
interrupt handler offset is ORed with EVBA, so we need to provide
enough alignment of EVBA that this OR operation works as an ADD.
Currently, the last interrupt handler is not nearly a full page away
from EVBA, so it won't be a problem.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Use PAGE_SIZE, THREAD_SIZE and L1_CACHE_BYTES instead of harcoded
constants in places where that's what we really mean.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Rename vmlinux.lds to a .S file to match other architectures.
Simplify Makefile to match the rename and deleted the unused
USE_STANDARD_AS_RULE
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Implement at32_add_device_usba() and use it to wire up the USBA device
on ATSTK1000 and ATNGW100.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This patch add multidrive support for pio driver
Signed-off-by: Matteo Vit - Dave S.r.l. <matteo.vit@dave.eu>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
When debugfs is available, /sys/kernel/debug/at32ap_clk will provide a
dump of the power manager registers and of the current clock tree. This
can help sorting out various surprises, and when making runtime PM work.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
The makefile tweaks to allow the build during the move of
code from arch/i386 and arch/x86_64 are not longer necessary.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Move the headers to include/asm-x86 and fixup the
header install make rules
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
