Commit Graph

237 Commits

Author SHA1 Message Date
Jakub Jelinek
4732efbeb9 [PATCH] FUTEX_WAKE_OP: pthread_cond_signal() speedup
ATM pthread_cond_signal is unnecessarily slow, because it wakes one waiter
(which at least on UP usually means an immediate context switch to one of
the waiter threads).  This waiter wakes up and after a few instructions it
attempts to acquire the cv internal lock, but that lock is still held by
the thread calling pthread_cond_signal.  So it goes to sleep and eventually
the signalling thread is scheduled in, unlocks the internal lock and wakes
the waiter again.

Now, before 2003-09-21 NPTL was using FUTEX_REQUEUE in pthread_cond_signal
to avoid this performance issue, but it was removed when locks were
redesigned to the 3 state scheme (unlocked, locked uncontended, locked
contended).

Following scenario shows why simply using FUTEX_REQUEUE in
pthread_cond_signal together with using lll_mutex_unlock_force in place of
lll_mutex_unlock is not enough and probably why it has been disabled at
that time:

The number is value in cv->__data.__lock.
        thr1            thr2            thr3
0       pthread_cond_wait
1       lll_mutex_lock (cv->__data.__lock)
0       lll_mutex_unlock (cv->__data.__lock)
0       lll_futex_wait (&cv->__data.__futex, futexval)
0                       pthread_cond_signal
1                       lll_mutex_lock (cv->__data.__lock)
1                                       pthread_cond_signal
2                                       lll_mutex_lock (cv->__data.__lock)
2                                         lll_futex_wait (&cv->__data.__lock, 2)
2                       lll_futex_requeue (&cv->__data.__futex, 0, 1, &cv->__data.__lock)
                          # FUTEX_REQUEUE, not FUTEX_CMP_REQUEUE
2                       lll_mutex_unlock_force (cv->__data.__lock)
0                         cv->__data.__lock = 0
0                         lll_futex_wake (&cv->__data.__lock, 1)
1       lll_mutex_lock (cv->__data.__lock)
0       lll_mutex_unlock (cv->__data.__lock)
          # Here, lll_mutex_unlock doesn't know there are threads waiting
          # on the internal cv's lock

Now, I believe it is possible to use FUTEX_REQUEUE in pthread_cond_signal,
but it will cost us not one, but 2 extra syscalls and, what's worse, one of
these extra syscalls will be done for every single waiting loop in
pthread_cond_*wait.

We would need to use lll_mutex_unlock_force in pthread_cond_signal after
requeue and lll_mutex_cond_lock in pthread_cond_*wait after lll_futex_wait.

Another alternative is to do the unlocking pthread_cond_signal needs to do
(the lock can't be unlocked before lll_futex_wake, as that is racy) in the
kernel.

I have implemented both variants, futex-requeue-glibc.patch is the first
one and futex-wake_op{,-glibc}.patch is the unlocking inside of the kernel.
 The kernel interface allows userland to specify how exactly an unlocking
operation should look like (some atomic arithmetic operation with optional
constant argument and comparison of the previous futex value with another
constant).

It has been implemented just for ppc*, x86_64 and i?86, for other
architectures I'm including just a stub header which can be used as a
starting point by maintainers to write support for their arches and ATM
will just return -ENOSYS for FUTEX_WAKE_OP.  The requeue patch has been
(lightly) tested just on x86_64, the wake_op patch on ppc64 kernel running
32-bit and 64-bit NPTL and x86_64 kernel running 32-bit and 64-bit NPTL.

With the following benchmark on UP x86-64 I get:

for i in nptl-orig nptl-requeue nptl-wake_op; do echo time elf/ld.so --library-path .:$i /tmp/bench; \
for j in 1 2; do echo ( time elf/ld.so --library-path .:$i /tmp/bench ) 2>&1; done; done
time elf/ld.so --library-path .:nptl-orig /tmp/bench
real 0m0.655s user 0m0.253s sys 0m0.403s
real 0m0.657s user 0m0.269s sys 0m0.388s
time elf/ld.so --library-path .:nptl-requeue /tmp/bench
real 0m0.496s user 0m0.225s sys 0m0.271s
real 0m0.531s user 0m0.242s sys 0m0.288s
time elf/ld.so --library-path .:nptl-wake_op /tmp/bench
real 0m0.380s user 0m0.176s sys 0m0.204s
real 0m0.382s user 0m0.175s sys 0m0.207s

The benchmark is at:
http://sourceware.org/ml/libc-alpha/2005-03/txt00001.txt
Older futex-requeue-glibc.patch version is at:
http://sourceware.org/ml/libc-alpha/2005-03/txt00002.txt
Older futex-wake_op-glibc.patch version is at:
http://sourceware.org/ml/libc-alpha/2005-03/txt00003.txt
Will post a new version (just x86-64 fixes so that the patch
applies against pthread_cond_signal.S) to libc-hacker ml soon.

Attached is the kernel FUTEX_WAKE_OP patch as well as a simple-minded
testcase that will not test the atomicity of the operation, but at least
check if the threads that should have been woken up are woken up and
whether the arithmetic operation in the kernel gave the expected results.

Acked-by: Ingo Molnar <mingo@redhat.com>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Jamie Lokier <jamie@shareable.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:17 -07:00
Tony Lindgren
9839c6b8dd [ARM] 2888/1: OMAP 3/4: Update omap include files, take 2
Patch from Tony Lindgren

This patch syncs the mainline kernel with linux-omap tree.
The highlights of the patch are:
- Start adding 24xx support by Paul Mundt
- Clean-up of cpu detection by Dirk Behme and Tony Lindgren
- Add DSP header by Toshihiro Kobayashi
- Add support for mtd-xip by Vladimir Barinov
- Add various new mux registers
- Move OMAP specific serial defines back to serial.h

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-07 17:20:27 +01:00
Ben Dooks
7efb833d64 [ARM] 2889/1: S3C2410 - Add machine Anubis
Patch from Ben Dooks

Add the Simtec Anubis to the list of supported
machines in the arch/arm/mach-s3c2410 directory.
This ensures the core peripherals are registered,
the timer source is configured and the correct
power-management is enabled.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-07 11:49:23 +01:00
Linus Torvalds
1e231efe50 Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-09-06 00:45:34 -07:00
Richard Purdie
0ce7625f3c [ARM] 2882/1: pxa2xx_sharpsl: Update PCMCIA driver to support variety of new hardware
Patch from Richard Purdie

This patch updates the PCMCIA pxa2xx_sharpsl driver to support multiple scoop
devices by adding a scoop to pcmcia slot mapping structure. It adds platform
support for poodle, is known to work on spitz (which is dual slot) and
should also support collie with a minor amount of further work.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-05 20:49:54 +01:00
Russell King
9d88347758 [ARM] Remove unused DYN_TICK_* macros
Neither DYN_TICK_SKIPPING nor DYN_TICK_SUITABLE are used on ARM.
Remove them.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-05 10:21:04 +01:00
Linus Torvalds
64c4813d9e Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-09-05 00:17:25 -07:00
Kyle Moffett
fa5b08d5f8 [PATCH] sab: consolidate kmem_bufctl_t
This is used only in slab.c and each architecture gets to define whcih
underlying type is to be used.

Seems a bit silly - move it to slab.c and use the same type for all
architectures: unsigned int.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-05 00:05:48 -07:00
Stephen Rothwell
fd4fd5aac1 [PATCH] mm: consolidate get_order
Someone mentioned that almost all the architectures used basically the same
implementation of get_order.  This patch consolidates them into
asm-generic/page.h and includes that in the appropriate places.  The
exceptions are ia64 and ppc which have their own (presumably optimised)
versions.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-05 00:05:39 -07:00
Russell King
664399e1fb [ARM] Wrap calls to descriptor handlers
This is part of Thomas Gleixner's generic IRQ patch, which converts
ARM to use the generic IRQ subsystem.  Here, we wrap calls to
desc->handler() in an inline function, desc_handle_irq().  This
reduces the size of Thomas' patch since the changes become more
localised.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-04 19:45:00 +01:00
Russell King
7801907b8c [ARM] Change irq_chip wake/type methods to set_wake/set_type
This is part of Thomas Gleixner's generic IRQ patch, which converts
ARM to use the generic IRQ subsystem.  Here, we rename two of the
irq_chip methods - wake becomes set_wake, and type becomes set_type.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-04 19:43:13 +01:00
Linus Torvalds
66f3767376 Merge HEAD from master.kernel.org:/home/rmk/linux-2.6-arm 2005-09-02 00:52:05 -07:00
Linus Torvalds
b25dd2842b Merge HEAD from master.kernel.org:/home/rmk/linux-2.6-arm.git 2005-09-01 10:56:57 -07:00
Nicolas Pitre
68d9102f76 [ARM] 2865/2: fix fadvise64_64 syscall argument passing
Patch from Nicolas Pitre

The prototype for sys_fadvise64_64() is:
    long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
The argument list is therefore as follows on legacy ABI:
	fd: type int (r0)
	offset: type long long (r1-r2)
	len: type long long (r3-sp[0])
	advice: type int (sp[4])
With EABI this becomes:
	fd: type int (r0)
	offset: type long long (r2-r3)
	len: type long long (sp[0]-sp[4])
	advice: type int (sp[8])
Not only do we have ABI differences here, but the EABI version requires
one additional word on the syscall stack.
To avoid the ABI mismatch and the extra stack space required with EABI
this syscall is now defined with a different argument ordering
on ARM as follows:
    long sys_arm_fadvise64_64(int fd, int advice, loff_t offset, loff_t len)
This gives us the following ABI independent argument distribution:
	fd: type int (r0)
	advice: type int (r1)
	offset: type long long (r2-r3)
	len: type long long (sp[0]-sp[4])
Now, since the syscall entry code takes care of 5 registers only by
default including the store of r4 to the stack, we need a wrapper to
store r5 to the stack as well.  Because that wrapper was missing and was
always required this means that sys_fadvise64_64 never worked on ARM and
therefore we can safely reuse its syscall number for our new
sys_arm_fadvise64_64 interface.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-01 12:37:13 +01:00
David Vrabel
147056fb84 [ARM] 2869/1: ixp4xx: correct ioread*/iowrite*
Patch from David Vrabel

Correct the ioread* and iowrite* functions.  In particular, add an offset to the cookie in ioport_map so we can map I/O port ranges starting from 0 (0 is for reporting errors).

Signed-off-by: David Vrabel <dvrabel@arcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-31 21:45:14 +01:00
Patrick McHardy
b0573dea1f [NET]: Introduce SO_{SND,RCV}BUFFORCE socket options
Allows overriding of sysctl_{wmem,rmrm}_max

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29 15:31:35 -07:00
Richard Purdie
3e88a579d0 [ARM] 2861/1: PXA: Add some extra pxa27x register definitions
Patch from Richard Purdie

Add some extra pxa27x register definitions needed for the Sharp
SL-C3000 (Spitz).

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-29 22:46:33 +01:00
Nicolas Pitre
cb85a502e0 [ARM] 2858/1: ARM has sys_fadvise64_64 only
Patch from Nicolas Pitre

There is no need to define __ARCH_WANT_SYS_FADVISE64 on ARM since it
only serves to compile in a compatibility wrapper for sys_fadvise64
which never was tied to any syscall number.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-29 22:46:32 +01:00
Ben Dooks
d6b0bf213b [ARM] 2855/1: S3C2410 - add CLKSLOW definitions, and show in init
Patch from Ben Dooks

Add the definitions for the S3C2410_CLKSLOW registers to
the header files, and show the values when the system
starts up

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-29 22:46:30 +01:00
Deepak Saxena
bdf82b59c5 [ARM] 2836/1: Cleanup IXP4xx GPIO code
Patch from Deepak Saxena

This patch implements the set_irq_type() hooks for configuring GPIO
IRQ type and updates all the platforms to use it instead of the
gpio_line_config() function which is now used to configure input
vs. output on the pins.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-29 22:46:30 +01:00
Linus Torvalds
97c169a21b Merge HEAD from master.kernel.org:/home/rmk/linux-2.6-arm.git 2005-08-29 10:35:43 -07:00
Linus Torvalds
2321fbd2b8 Merge HEAD from master.kernel.org:/home/rmk/linux-2.6-ucb.git 2005-08-29 10:34:31 -07:00
Deepak Saxena
9138dccbb9 [PATCH] Fix IXP4xx CLOCK_TICK_RATE
As pointed out in the following thread, the CLOCK_TICK_RATE setting for
IXP4xx is incorrect b/c the HW ignores the lowest 2 bits of the LATCH
value.

   http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2005-August/030950.html

Tnx to George Anziger and Egil Hjelmeland for finding the issue.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-23 20:06:33 -07:00
Al Viro
33215652e4 [PATCH] qualifiers in return types - easy cases
a bunch of functions switched from volatile to __attribute__((noreturn)) and
from const to __attribute_pure__

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-23 18:43:45 -07:00
Russell King
f27ecacc54 [ARM] Add support for ARM GIC
Add support for the ARM Generic Interrupt Controller.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-18 21:31:00 +01:00
Russell King
323cdfc191 [MFD] Add SA11x0 MCP platform device support
Add platform device data for the SA11x0 MCP device.  This allows
platforms to customise the configuration of the SA11x0 MCP device
according to their needs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-18 10:10:46 +01:00
Robert Love
498de0cc5e [ARM] Add syscall stubs for inotify and ioprio system calls
Signed-off-by: Robert Love <rml@novell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-15 10:57:08 +01:00
Ben Dooks
484ae6bd95 [PATCH] ARM: 2849/1: S3C24XX - USB host update (2848/1)
Patch from Ben Dooks

Rename the s3c2410_report_oc() to s3c2410_usb_report_oc()
as this is an usb specific function.
Change port power on the usb-simtec implementation to only
power up the output if both are set, as per the usb 1.1
specification

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-10 16:45:14 +01:00
Russell King
6626a7076d [ARM] Control v6 'global' bit via Linux PTE entries
Unfortunately, we can't use the "user" bit in the page tables to
control whether a page table entry is "global" or "asid" specific,
since the vector page is mapped as "user" accessible but is not
process specific.

Therefore, give direct control of the ARMv6 "nG" (not global)
bit to the mm layers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-10 16:18:35 +01:00
Russell King
1b9749e7f1 [ARM] Use #defined constants for manipulating v6 hardware PTE bits
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-10 16:15:32 +01:00
Dominik Brodowski
43c3473552 [PATCH] pci and yenta: pcibios_bus_to_resource
In yenta_socket, we default to using the resource setting of the CardBus
bridge.  However, this is a PCI-bus-centric view of resources and thus needs
to be converted to generic resources first.  Therefore, add a call to
pcibios_bus_to_resource() call in between.  This function is a mere wrapper on
x86 and friends, however on some others it already exists, is added in this
patch (alpha, arm, ppc, ppc64) or still needs to be provided (parisc -- where
is its pcibios_resource_to_bus() ?).

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-04 21:32:46 -07:00
Russell King
e7ec02938d [ARM SMP] Fix another ARMv6 bitop problem
We sometimes forgot to check whether the exclusive store succeeded.
Ensure that we always check.  Also ensure that we always use the
out of line versions, since the inline versions are not SMP safe.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-28 20:36:26 +01:00
Linus Torvalds
fc00a6274b Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-07-26 15:13:26 -07:00
Linus Torvalds
0983f05094 Merge master.kernel.org:/home/rmk/linux-2.6-arm-smp 2005-07-26 15:12:54 -07:00
Eric W. Biederman
7c9034735e [PATCH] Add emergency_restart()
When the kernel is working well and we want to restart cleanly
kernel_restart is the function to use.   But in many instances
the kernel wants to reboot when thing are expected to be working
very badly such as from panic or a software watchdog handler.

This patch adds the function emergency_restart() so that
callers can be clear what semantics they expect when calling
restart.  emergency_restart() is expected to be callable
from interrupt context and possibly reliable in even more
trying circumstances.

This is an initial generic implementation for all architectures.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-26 14:35:41 -07:00
Russell King
6d9b37a3a8 [PATCH] ARM SMP: Add ARMv6 memory barriers
Convert explicit gcc asm-based memory barriers into smp_mb() calls.
These change between barrier() and the ARMv6 data memory barrier
instruction depending on whether ARMv6 SMP is enabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-26 19:44:26 +01:00
Russell King
9560782f9a [PATCH] ARM SMP: Use exclusive load/store for __xchg
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-26 19:39:31 +01:00
Dimitry Andric
02cdad3f93 [PATCH] ARM: 2819/1: Fix several S3C24x0 IIS defines
Patch from Dimitry Andric

- Change S3C2440_IISCON_MPLL to S3C2440_IISMOD_MPLL:
  The S3C2440 IISCON register doesn\'t control the master clock selection, this is done with the IISMOD register.
- Correct S3C2410_IISMOD_256FS and S3C2410_IISMOD_384FS:
  This is set via bit 2 of IISMOD, not bit 1.
- Add S3C2410_IISCON_PSCEN (prescaler enable), for completeness\' sake.

Signed-off-by: Dimitry Andric <dimitry.andric@tomtom.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-26 19:20:25 +01:00
Russell King
4e8fd22bd4 [PATCH] ARM SMP: Fix ARMv6 spinlock and semaphore implementations
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-24 12:13:40 +01:00
Sascha Hauer
772a9e631c [PATCH] ARM: 2687/1: i.MX framebuffer: make dmacr register platform configurable
Patch from Sascha Hauer

The dmacr needs different settings on some boards. This patch makes the
register configurable by the platform part.
Also we have imxfb_disable_controller(), so lets use it.

Signed-off-by: Steven Scholz
Signed-off-by: Sascha Hauer
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-17 20:15:36 +01:00
Alexander Schulz
b7523418f6 [PATCH] ARM: 2815/1: Shark: new defconfig, fixes with __io and serial ports
Patch from Alexander Schulz

This patch brings a new default config file for the shark and
fixes a compilation issue with io addressing and a runtime
problem with the serial ports, where I corrected a wrong
regshift value.
These are all shark specific files so I hope it is ok to
put them in one patch.

Signed-off-by: Alexander Schulz <alex@shark-linux.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-16 17:17:18 +01:00
Linus Torvalds
6cd59f7a41 Merge /home/torvalds/linux-2.6-arm 2005-07-13 10:12:50 -07:00
Len Brown
5028770a42 [ACPI] merge acpi-2.6.12 branch into latest Linux 2.6.13-rc...
Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 17:21:56 -04:00
David Shaohua Li
c9c3e457de [ACPI] PNPACPI vs sound IRQ
http://bugme.osdl.org/show_bug.cgi?id=4016

Written-by: David Shaohua Li <shaohua.li@intel.com>
Acked-by: Adam Belay <abelay@novell.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:03:30 -04:00
Linus Torvalds
200d481f28 Merge master.kernel.org:/pub/scm/linux/kernel/git/tglx/mtd-2.6 2005-07-11 10:18:18 -07:00
Russell King
d12734d14e [PATCH] ARM SMP: Rename cpu_present_mask to cpu_possible_map
The kernel's terminology for this is cpu_possible_map not
cpu_present_mask.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 17:38:36 +01:00
Tony Lindgren
bb13b5fdba [PATCH] ARM: 2804/1: OMAP update 9/11: Update OMAP arch files
Patch from Tony Lindgren

This patch by various OMAP developers syncs the OMAP
specific arch files with the linux-omap tree.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-10 19:58:18 +01:00
Tony Lindgren
d48af15ea7 [PATCH] ARM: 2802/1: OMAP update 8/11: Update OMAP arch files
Patch from Tony Lindgren

This patch by various OMAP developers syncs the OMAP
specific arch files with the linux-omap tree.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-10 19:58:17 +01:00
Tony Lindgren
af973d2aff [PATCH] ARM: 2797/1: OMAP update 1/11: Update include files
Patch from Tony Lindgren

This patch by various OMAP developers syncs the OMAP
specific include files with the linux-omap tree.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-10 19:58:06 +01:00
Lennert Buytenhek
28187f2ce3 [PATCH] ARM: 2793/1: platform serial support for ixp2000
Patch from Lennert Buytenhek

This patch converts the ixp2000 serial port over to a platform
serial device.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-10 19:44:53 +01:00
Thomas Gleixner
97f927a4d7 [MTD] XIP cleanup
Move the architecture dependend code into include/asm/mtd-xip.h

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2005-07-07 16:50:16 +02:00
Deepak Saxena
450008b5a6 [PATCH] ARM: 2792/1: IXP4xx iomap API implementation
Patch from Deepak Saxena

This patch implements the iomap API for Intel IXP4xx NPU systems.
We need to implement our own version of the API functions b/c of the
PCI hostbridge does not provide the capability to map PCI I/O space
into the CPU's physical memory space. In addition, if a system has
more than 64M of PCI memory mapped BARs, PCI memory must also be
accessed indirectly.  This patch changes the assignment of PCI I/O
resources to fall into to 0x0000:0xffff range so that we can trap
I/O areas in our ioread/iowrite macros.

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-06 23:06:05 +01:00
Russell King
17af691cd1 [PATCH] ARM: Fix new-ABI layout of struct stat64
Add __attribute__((packed)) to ensure that the stat64 structure is
correctly laid out no matter which ABI the kernel is compiled for.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-04 13:02:46 +01:00
Russell King
f9bd6ea446 [PATCH] ARM: Change 'param_offset' to 'boot_params'
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-04 10:43:36 +01:00
Russell King
e9dea0c65d [PATCH] ARM: Remove machine description macros
Remove the pointless machine description macros, favouring C99
initialisers instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-03 17:38:58 +01:00
Todd Poynor
3e18a45abc [PATCH] ARM: 2782/1: PXA27x MDREFR K0DB4 define
Patch from Todd Poynor

Add definition of K0DB4 SDCLK<0,3> divide-by-4 control/status bit in the
MDREFR register for Intel XScale PXA27x.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-01 11:27:06 +01:00
Todd Poynor
26705ca46b [PATCH] ARM: 2781/2: PXA27x Standby mode take 2
Patch from Todd Poynor

Add support for PXA27x Standby mode, a low-power mode that retains CPU
and some peripheral state (the existing "sleep" mode is a power-power
mode that retains less state). Activated via:
echo -n standby > /sys/power/state
From: David Burrage and Todd Poynor

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-01 11:27:05 +01:00
Russell King
cfb0810eab [PATCH] ARM: Don't try to send a signal to pid0
If we receive an unrecognised abort during boot, don't try to
send a signal to pid0, but instead report the current state.
This leads to less confusing debug reports.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-30 11:06:49 +01:00
Richard Purdie
9ec3c75cde [PATCH] ARM: 2768/1: PXA: Add a required header file for LL_DEBUG
Patch from Richard Purdie

With DEBUG enabled, head.S includes arch/debug-macro.S. On the PXA, this
contains references to the macro io_p2v() so hardware.h needs to be
included.

Signed-off-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 15:17:49 +01:00
Russell King
b720f73296 [PATCH] ARM: Convert ARM timer implementations to use readl/writel
Convert ARMs timer implementations to use readl/writel instead of accessing
the registers via a struct.

People have recently asked if accessing timers via a structure is the
"right way" and its not the Linux way.  So fix this code to conform to
"The Linux Way"(tm).

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2005-06-29 15:15:54 +01:00
Russell King
99a0616bcd Merge with ../linux-2.6-smp 2005-06-29 09:40:28 +01:00
Linus Torvalds
7e568e62e9 Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-06-28 15:00:08 -07:00
Ben Dooks
072cd703b6 [PATCH] ARM: 2762/1: S3C24XX Audio platform data
Patch from Ben Dooks

This provides the s3c24xx audio platform data which can be
supplied from any of the board specific drivers.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-28 21:01:03 +01:00
Russell King
053a7b5b76 [PATCH] ARM SMP: __xchg support
This enables the existing __xchg implementation to be used on SMP.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-28 19:22:25 +01:00
Russell King
603fff5442 [PATCH] ARM SMP: TLB implementations only affect local CPU
The existing TLB flush implementations only have an effect on
the local CPU.  Prefix them with local_.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-28 13:40:39 +01:00
Greg KH
8644d2a42b Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2005-06-27 22:07:56 -07:00
Andrew Morton
bb4a61b6ea [PATCH] PCI: fix up errors after dma bursting patch and CONFIG_PCI=n
With CONFIG_PCI=n:

In file included from include/linux/pci.h:917,
                 from lib/iomap.c:6:
include/asm/pci.h:104: warning: `enum pci_dma_burst_strategy' declared inside parameter list
include/asm/pci.h:104: warning: its scope is only this definition or declaration, which is probably not what you want.
include/asm/pci.h: In function `pci_dma_burst_advice':
include/asm/pci.h:106: dereferencing pointer to incomplete type
include/asm/pci.h:106: `PCI_DMA_BURST_INFINITY' undeclared (first use in this function)
include/asm/pci.h:106: (Each undeclared identifier is reported only once
include/asm/pci.h:106: for each function it appears in.)
make[1]: *** [lib/iomap.o] Error 1

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27 21:52:46 -07:00
David S. Miller
e24c2d963a [PATCH] PCI: DMA bursting advice
After seeing, at best, "guesses" as to the following kind
of information in several drivers, I decided that we really
need a way for platforms to specifically give advice in this
area for what works best with their PCI controller implementation.

Basically, this new interface gives DMA bursting advice on
PCI.  There are three forms of the advice:

1) Burst as much as possible, it is not necessary to end bursts
   on some particular boundary for best performance.

2) Burst on some byte count multiple.  A DMA burst to some multiple of
   number of bytes may be done, but it is important to end the burst
   on an exact multiple for best performance.

   The best example of this I am aware of are the PPC64 PCI
   controllers, where if you end a burst mid-cacheline then
   chip has to refetch the data and the IOMMU translations
   which hurts performance a lot.

3) Burst on a single byte count multiple.  Bursts shall end
   exactly on the next multiple boundary for best performance.

   Sparc64 and Alpha's PCI controllers operate this way.  They
   disconnect any device which tries to burst across a cacheline
   boundary.

   Actually, newer sparc64 PCI controllers do not have this behavior.
   That is why the "pdev" is passed into the interface, so I can
   add code later to check which PCI controller the system is using
   and give advice accordingly.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27 21:52:45 -07:00
Linus Torvalds
d3b8a1a849 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6 2005-06-27 15:13:26 -07:00
David Brownell
65111084c6 [PATCH] USB: more omap_udc updates (dma and omap1710)
More omap_udc updates:

  * OMAP 1710 updates
      - new UDC bit for clearing endpoint toggle, affecting CLEAR_HALT
      - new OTG bits affecting wakeup
  * Fix the bug Vladimir noted, that IN-DMA transfer code path kicks in
    for under 1024 bytes (not "up to 1024 bytes")
  * Handle transceiver setup more intelligently
      - use transceiver whenever one's available; this can be handy
        for GPIO based, loopback, or transceiverless configs
      - cleanup correctly after the "unrecognized HMC" case
  * DMA performance tweaks
      - allow burst/pack for memory access
      - use 16 bit DMA access most of the time on TIPB
  * Add workarounds for some DMA errata (not observed "in the wild"):
      - DMA CSAC/CDAC reads returning zero
      - RX/TX DMA config registers bit 12 always reads as zero (TI patch)
  * More "sparse" warnings removed, notably "changing" the SETUP packet
    to return data in USB byteorder (an API change, null effect on OMAP
    except for these warnings).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27 14:43:50 -07:00
Deepak Saxena
b46ffaefe3 [PATCH] ARM: 2759/1: Fix IXP4xx debug code (again)
Patch from Deepak Saxena

Accidently swapped the order of movne and orrne. Bad.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27 21:48:48 +01:00
Michael Burian
eb4e10d091 [PATCH] ARM: 2758/1: Fix comment in file header to read "ARM" instead i386
Patch from Michael Burian

This does not look like an include file for "i386", so use "ARM" instead.

Signed-off-by: Michael Burian <dynmail1@gassner-waagen.at>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27 15:58:39 +01:00
Russell King
c79ebfa8d2 [PATCH] ARM: Fix speeling eroor in io.h
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27 14:23:38 +01:00
Russell King
2ea83398b7 [PATCH] ARM: Add VST idle loop call
This call allows the dynamic tick support to reprogram the timer
immediately before the CPU idles.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27 14:04:05 +01:00
Lennert Buytenhek
baaf7ed179 [PATCH] ARM: 2756/1: add ixp2000 msf mapping
Patch from Lennert Buytenhek

Add a mapping for the ixp2400 and ixp2800 msf unit.  The msf is the
ixp2000's 'media and switch fabric' unit, which handles the networking
part of the chip.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-26 22:24:17 +01:00
Lennert Buytenhek
67603be482 [PATCH] ARM: 2755/1: describe ixp2000 virtual memory map layout
Patch from Lennert Buytenhek

Add a comment to asm/arch-ixp2000/ixp2000-regs.h describing the
ixp2000 virtual memory map layout.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-26 22:24:16 +01:00
Lennert Buytenhek
15aca90363 [PATCH] ARM: 2754/1: move ixp2000 VMALLOC_END up
Patch from Lennert Buytenhek

As the ixdp cpld mappings now live at 0xfe000000, we can push
VMALLOC_END upwards to 0xfb000000, where the first iotable mapping
begins.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-26 22:24:14 +01:00
Lennert Buytenhek
91f6a589fb [PATCH] ARM: 2753/1: move ixdp* cpld mappings
Patch from Lennert Buytenhek

All ixdp platforms currently have a cpld mapped in at 0xfafff000.
Since this address is not 1M-aligned, a regular page mapping will be
used instead of a section mapping, which opens up the possibility of
triggering ixp2400 erratum #66 as we only do the XCB=101 workaround
thing for section mappings.
There is still a lot of space higher up in the virtual memory map
for 1M mappings, so move the cpld mapping to 0xfe000000 and make it
1M big so that a section mapping will be used for it.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-26 22:24:13 +01:00
Nick Piggin
4866cde064 [PATCH] sched: cleanup context switch locking
Instead of requiring architecture code to interact with the scheduler's
locking implementation, provide a couple of defines that can be used by the
architecture to request runqueue unlocked context switches, and ask for
interrupts to be enabled over the context switch.

Also replaces the "switch_lock" used by these architectures with an oncpu
flag (note, not a potentially slow bitflag).  This eliminates one bus
locked memory operation when context switching, and simplifies the
task_running function.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-25 16:24:43 -07:00
Russell King
8749af6821 [PATCH] ARM: Generic Dynamic Tick Timer support for ARM, take 4
This patch adds support for Dynamic Tick Timer for ARM. Dynamic Tick is
also known as VST (Variable Scheduling Timeouts).

Dynamic Tick has been in use in the OMAP tree since last October.  The
patch is not intrusive, and does not do anything unless CONFIG_NO_IDLE_HZ
is defined.  This patch has the following fixed based on comments from
RMK:
- Time is updated before calling interrupt handlers.
- Added new interrupt flag SA_TIMER to avoid duplicate timer interrupts
- Moved struct dyn_tick_timer to time.h until we at some point probably
  have an arch independent dyn-tick.h
- Cleaned up testing for DYN_TICK_ENABLED in irq.c

 I've cleaned up this patch to fix some remaining issues:
 - Call the timer tick handler with irqs disabled, as it would be from
   a normal interrupt
 - if we have a dyn_tick, we better implement all methods.
 - generic timer_dyn_reprogram() call, to be called before sleeping
 - added command line option - "dyntick=" to allow boot-time control
   of this feature
    -- rmk

Signed-off-by: Tony Lindgren
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-25 19:39:45 +01:00
Lennert Buytenhek
321ab6a5fa [PATCH] ARM: 2752/1: disable ixp2000 PCI I/O software workaround on chips that don't need it
Patch from Lennert Buytenhek

The later ixp2000 models don't need the PCI I/O workaround that we
currently perform.  Add a config option to disable the workaround,
and panic on boot if a kernel without the workaround is booted on a
buggy chip.  As only pre-production ixp2000s need the workaround,
the default is for it not to be configured in.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-25 19:30:04 +01:00
Lennert Buytenhek
2966207c7e [PATCH] ARM: 2748/1: ixp2000 implementation of the iomap api
Patch from Lennert Buytenhek

A number of ixp2000 models have a bug where the byte lanes for PCI I/O
transactions are swapped.  We already work around this in our versions
of {in,out}{b,w,l}, but we also need to perform these workarounds in a
custom implementation of the new iomap API, provided in this patch.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-24 23:11:31 +01:00
Lennert Buytenhek
7533fca8e8 [PATCH] ARM: 2747/1: allow platforms to provide their own iomap implementation
Patch from Lennert Buytenhek

This patch conditionalises the io{read,write}{8,16,32} defines and the
prototypes for ioport_map/ioport_unmap in asm-arm/io.h on ioread8 not
already having been defined.  This is done so that platforms can provide
their own implementation of the iomap API, ixp2000 for example needs
this.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-24 23:11:31 +01:00
Deepak Saxena
5932ae3f5d [PATCH] ARM: 2745/1: Fix IXP4xx debug macros
Patch from Deepak Saxena

Current IXP4xx debug macros do not work in the small window between
the MMU being enabled and the call to map_io() b/c the standard
peripheral mapping is not properly setup for use with the low-level
debug code. This patch creates a new section-aligned mapping for the
UART specifically for use with the debug macros.

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-24 20:54:35 +01:00
Lennert Buytenhek
c4982887ca [PATCH] ARM: 2744/1: ixp2000 gpio irq support
Patch from Lennert Buytenhek

This patch cleans up the ixp2000 gpio irq code and implements the
set_irq_type method for gpio irqs so that users can select for which
events (falling edge/rising edge/level low/level high) on the gpio
pin they want the corresponding gpio irq to be triggered.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-24 20:54:35 +01:00
Lennert Buytenhek
c6b56949de [PATCH] ARM: 2740/1: ixp2000 align{b,w} need to parenthesize their arguments
Patch from Lennert Buytenhek

Two macros that are used on the ixp2000 to fixup byte lane enables
for I/O space accesses, align{b,w}, use their arguments without
parenthesizing them.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-24 20:54:34 +01:00
Jesper Juhl
dcd497f99a [PATCH] streamline preempt_count type across archs
The preempt_count member of struct thread_info is currently either defined
as int, unsigned int or __s32 depending on arch.  This patch makes the type
of preempt_count an int on all archs.

Having preempt_count be an unsigned type prevents the catching of
preempt_count < 0 bugs, and using int on some archs and __s32 on others is
not exactely "neat" - much nicer when it's just int all over.

A previous version of this patch was already ACK'ed by Robert Love, and the
only change in this version of the patch compared to the one he ACK'ed is
that this one also makes sure the preempt_count member is consistently
commented.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 09:45:19 -07:00
Linus Torvalds
a493604400 Merge master.kernel.org:/home/rmk/linux-2.6-arm 2005-06-22 14:51:06 -07:00
Russell King
bdf042486a [PATCH] ARM: Factor out common pmd_populate functionality
Both pmd_populate variants set two pmd entries before
ensuring that they are flushed from the cache.  Separate
this functionality into __pmd_populate().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22 20:58:29 +01:00
David Brownell
72cd799544 [PATCH] I2C: add i2c driver for TPS6501x
This adds an I2C driver for the TPS6501x series of power management chips.
It's used on many OMAP based boards, and this driver has been widely used
in the Linux-OMAP trees over the last year or so.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:52:01 -07:00
Ingo Molnar
39c715b717 [PATCH] smp_processor_id() cleanup
This patch implements a number of smp_processor_id() cleanup ideas that
Arjan van de Ven and I came up with.

The previous __smp_processor_id/_smp_processor_id/smp_processor_id API
spaghetti was hard to follow both on the implementational and on the
usage side.

Some of the complexity arose from picking wrong names, some of the
complexity comes from the fact that not all architectures defined
__smp_processor_id.

In the new code, there are two externally visible symbols:

 - smp_processor_id(): debug variant.

 - raw_smp_processor_id(): nondebug variant. Replaces all existing
   uses of _smp_processor_id() and __smp_processor_id(). Defined
   by every SMP architecture in include/asm-*/smp.h.

There is one new internal symbol, dependent on DEBUG_PREEMPT:

 - debug_smp_processor_id(): internal debug variant, mapped to
                             smp_processor_id().

Also, i moved debug_smp_processor_id() from lib/kernel_lock.c into a new
lib/smp_processor_id.c file.  All related comments got updated and/or
clarified.

I have build/boot tested the following 8 .config combinations on x86:

 {SMP,UP} x {PREEMPT,!PREEMPT} x {DEBUG_PREEMPT,!DEBUG_PREEMPT}

I have also build/boot tested x64 on UP/PREEMPT/DEBUG_PREEMPT.  (Other
architectures are untested, but should work just fine.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21 18:46:13 -07:00
Andrew Morton
9a558cb4ec [PATCH] arm: irqs_disabled() type fix
kernel/sched.c: In function `__might_sleep':
kernel/sched.c:5461: warning: int format, long unsigned int arg (arg 3)

We expect irqs_disabled() to return an int (poor man's bool).

Acked-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21 18:46:11 -07:00
Lennert Buytenhek
e4fe19819e [PATCH] ARM: 2701/1: free up ixp2000 timer 4 for the watchdog
Patch from Lennert Buytenhek

The IXP2000 has four timers, but if we're on an A-step IXP2800, timer
2 and 3 don't work.  We need two timers for timekeeping (one for the
timer interrupt and one for tracking missed jiffies), so on early
IXP2800s we have no other choice but to use timer 1 and 4 for that,
but on all other IXP2000s we'd rather leave timer 4 free since that's
the only timer we can use for the watchdog.
So, on buggy IXP2000s (i.e. the A-step IXP2800) we use timer 4 for
tracking missed jiffies, and on all all non-buggy IXP2000s (i.e.
everything but the A-step IXP2800) we use timer 2.
On a pre-production IXP2800, this patch should print these messages
on boot:
	Enabling IXP2800 erratum #25 workaround
	Unable to use IXP2000 watchdog due to IXP2800 erratum #25
On any non-buggy IXP2800 (as well as on IXP2400s) you shouldn't see
anything at all, and the watchdog should be usable again.

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 18:51:07 +01:00
Catalin Marinas
c0da085ad2 [PATCH] ARM: 2693/1: Add PCI support for Versatile/PB
Patch from Catalin Marinas

This patch adds PCI support for the Versatile PB926 platform.

Signed-off-by: Colin King
Signed-off-by: Catalin Marinas
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 18:51:06 +01:00
Bellido Nicolas
038c5b6025 [PATCH] ARM: 2686/2: AAEC-2000 Core support
Patch from Bellido Nicolas

Core support for AAEC-2000 based platforms.
This is an updated version of the previous patch, and takes
into account Russell's comments.
AAED-2000 default configuration will follow as soon
as some problems with the bootloader are sorted out...

Signed-off-by: Nicolas Bellido
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 18:51:05 +01:00
Russell King
09f0551d20 [PATCH] ARM: Add iomap support for ARM
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 18:44:37 +01:00
Russell King
b8a9b66fbe [PATCH] ARM: Add common CACHE_COLOUR macro
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 11:31:09 +01:00
Russell King
ea4423c3b6 Merge with ../linux-2.6-smp 2005-06-19 19:26:54 +01:00
Russell King
36c5ed23b9 [PATCH] ARM SMP: Fix PXA/SA11x0 suspend resume crash
We need to re-initialise the stack pointers for undefined, IRQ
and abort mode handlers whenever we resume.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19 18:39:33 +01:00
Russell King
fe6ef2daa2 [PATCH] ARM SMP: Add missed files from Integrator/CP platform
Add missed new files from basic SMP support for the Integrator/CP platform.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19 09:52:07 +01:00
Russell King
e65f38ed0b [PATCH] ARM SMP: Add support for startup of secondary processors
Create a temporary page table to startup secondary processors.  This
page table must have a 1:1 virtual/physical mapping for the kernel
in addition to the standard mappings to ensure that the secondary
CPU can enable its MMU safely.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-18 09:33:31 +01:00
Catalin Marinas
95220a2ea3 [PATCH] ARM: 2714/1: Fix the IB2 definitions for the Versatile platform
Patch from Catalin Marinas

The initial IB2 addresses did not depend on the IB2 base. This
patch defines them as (VERSATILE_IB2_BASE + offset).

Signed-off-by: Catalin Marinas
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-16 18:01:12 +01:00
Catalin Marinas
fea7722fd7 [PATCH] ARM: 2713/1: Fix the GPIO base for Integrator/CP
Patch from Catalin Marinas

The GPIO base for Integrator/CP is different from the
Integrator/AP. This patch sets the correct value for
INTEGRATOR_GPIO_BASE.

Signed-off-by: Catalin Marinas
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-16 18:01:11 +01:00
Russell King
b652b438fc [PATCH] I2C: Add PXA I2C driver
Add support for the I2C PXA driver.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-06-15 12:38:14 +01:00
Giorgio Padrin
57cfa5e97f [PATCH] ARM: 2703/1: pxa-regs.h: complete I2S GPIO alternate functions for PXA27x
Patch from Giorgio Padrin

The patch completes I2S GPIO alternate functions for PXA27x, adding I2S_SYSCLK.
File: pxa-regs.h .

Signed-off-by: Giorgio Padrin
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-08 19:00:15 +01:00
Mike Frysinger
718a30a5cf [PATCH] ARM: 2696/1: remove ';' in ELF_DATA define in asm-arm{,26}/elf.h
Patch from Mike Frysinger

the ELF_DATA define in both arm asm subdirs of linux/include/ contain a
semicolon at the end.  this of course will cause any code that tries to use
ELF_DATA in assignment or comparison to fail.  no other arch has a semicolon
in their ELF_DATA defines.

Signed-off-by: Mike Frysinger
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-03 20:52:26 +01:00
Deepak Saxena
4ab5c01c7c [PATCH] ARM: 2692/1: Fix compile warnings in include/asm-arm/arch-ixp2000/io.h
Patch from Deepak Saxena

This patch fixes the following warnings:
include/asm/arch/io.h: In function `insw':
include/asm/arch/io.h:78: warning: comparison of distinct pointer types
lacks acast
include/asm/arch/io.h:79: warning: comparison of distinct pointer types
lacks acast
include/asm/arch/io.h: In function `outsw':
include/asm/arch/io.h:103: warning: comparison of distinct pointer types
lacks a cast
include/asm/arch/io.h:104: warning: comparison of distinct pointer types
lacks a cast
include/asm/arch/io.h: In function `inw':
include/asm/arch/io.h:127: warning: comparison of distinct pointer types
lacks a cast

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-03 20:52:25 +01:00
Ben Dooks
9dabf9da18 [PATCH] ARM: 2676/1: S3C2440 - NAND register additions
Patch from Ben Dooks

Add the register definitions for the s3c2440 NAND controller
to the s3c2410 NAND register definitions

Signed-off-by: Ben Dooks
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-12 19:27:13 +01:00
Sascha Hauer
d7def6c22d [PATCH] ARM: 2666/1: i.MX pwm controller defines
Patch from Sascha Hauer

This patch adds the defines for the i.MX PWM controller

Signed-off-by: Steven Scholz
Signed-off-by: Sascha Hauer
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-10 19:01:35 +01:00
Russell King
d2bab05ac1 [PATCH] ARM: Move copy/clear user_page locking into implementation
Move the locking for copy_user_page() and clear_user_page() into
the implementations which require locking.  For simple memcpy/
memset based implementations, the locking is extra overhead which
is not necessary, and prevents preemption occuring.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-10 14:23:01 +01:00
Russell King
c4e1f6f6bf [PATCH] ARM: Add top_pmd, which points at the top-most page table
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-10 10:40:19 +01:00
Russell King
53d7ad1ea3 ARM: Add missed imxfb include file
This file got missed in the commit of patch 2661/1 thanks to a buggy
script.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-05 14:06:31 +01:00
Russell King
4f7a18124c [PATCH] ARM: Fix kernel stack offset calculations
Various places in the ARM kernel implicitly assumed that kernel
stacks are always 8K due to hard coded constants.  Replace these
constants with definitions.

Correct the allowable range of kernel stack pointer values within
the allocation.  Arrange for the entire kernel stack to be zeroed,
not just the upper 4K if CONFIG_DEBUG_STACK_USAGE is set.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-05 13:11:00 +01:00
Al Viro
b1ecb4c3a9 [PATCH] asm/signal.h unification
New file - asm-generic/signal.h.  Contains declarations of
__sighandler_t, __sigrestore_t, SIG_DFL, SIG_IGN, SIG_ERR and default
definitions of SIG_BLOCK, SIG_UNBLOCK and SIG_SETMASK.

asm-*/signal.h switched to including it.  The only exception is
asm-parisc/signal.h that wants its own declaration of __sighandler_t;
that one is left as-is.

asm-ppc64/signal.h required one more thing - unlike everybody else it
used __sigrestorer_t instead of usual __sigrestore_t.  PPC64 switched to
common spelling.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-04 07:33:15 -07:00
Russell King
1f9c381fa3 [PATCH] ARM: Clean up commenting/spacing for Integrator
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-03 12:22:19 +01:00
Russell King
5c3073e691 [PATCH] ARM: cleanup vmalloc start/offset macros
VMALLOC_START and VMALLOC_OFFSET are common between all ARM
machine classes.  Move them into include/asm-arm/pgtable.h,
but allow a machine class to override them if required.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-03 12:20:29 +01:00
Stas Sergeev
7f261b5f0d [PATCH] move SA_xxx defines to linux/signal.h
The attached patch moves the IRQ-related SA_xxx flags (namely, SA_PROBE,
SA_SAMPLE_RANDOM and SA_SHIRQ) from all the arch-specific headers to
linux/signal.h.  This looks like a left-over after the irq-handling code
was consolidated.  The code was moved to kernel/irq/*, but the flags are
still left per-arch.

Right now, adding a new IRQ flag to the arch-specific header, like this
patch does:
http://cvs.sourceforge.net/viewcvs.py/*checkout*/alsa/alsa-driver/utils/patches/pcsp-kernel-2.6.10-03.diff?rev=1.1
no longer works, it breaks the compilation for all other arches, unless you
add that flag to all the other arch-specific headers too.  So I think such
a clean-up makes sense.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:02 -07:00
Matt Mackall
c8538a7aa5 [PATCH] remove all kernel BUGs
This patch eliminates all kernel BUGs, trims about 35k off the typical
kernel, and makes the system slightly faster.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:01 -07:00
Russell King
4774e2260c [PATCH] ARM: IntegratorCP: Fix CLCD MUX selection values
The documentation on these values seems to be rather wrong.
These values have been determined by mere trial and error.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-30 23:32:38 +01:00
Russell King
d5aa207e46 [PATCH] ARM: RTC: allow driver methods to return error
Allow RTC drivers to return error codes from their read_time
or read_alarm methods.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-30 12:19:28 +01:00
Olav Kongas
05f9869bf2 [PATCH] ARM: 2649/1: Fix 'sparse -Wbitwise' warnings from MMIO macros
Patch from Olav Kongas

On ARM, the outX() and writeX() families of macros take the
result of cpu_to_leYY(), which is of restricted type __leYY,
and feed it to __raw_writeX(), which expect an argument of
unrestricted type. This results in 'sparse -Wbitwise'
warnings about incorrect types in assignments. Analogous
type mismatch warnings are issued for inX() and readX()
counterparts. The below patch resolves these warnings by
adding forced typecasts.

Signed-off-by: Olav Kongas
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-04-29 22:08:34 +01:00
Nicolas Pitre
2d2669b629 [PATCH] ARM: 2651/3: kernel helpers for NPTL support
Patch from Nicolas Pitre

This patch entirely reworks the kernel assistance for NPTL on ARM.
In particular this provides an efficient way to retrieve the TLS
value and perform atomic operations without any instruction emulation
nor special system call.  This even allows for pre ARMv6 binaries to
be forward compatible with SMP systems without any penalty.
The problematic and performance critical operations are performed
through segment of kernel provided user code reachable from user space
at a fixed address in kernel memory.  Those fixed entry points are
within the vector page so we basically get it for free as no extra
memory page is required and nothing else may be mapped at that
location anyway.
This is different from (but doesn't preclude) a full blown VDSO
implementation, however a VDSO would prevent some assembly tricks with
constants that allows for efficient branching to those code segments.
And since those code segments only use a few cycles before returning to
user code, the overhead of a VDSO far call would add a significant
overhead to such minimalistic operations.
The ARM_NR_set_tls syscall also changed number.  This is done for two
reasons:
1) this patch changes the way the TLS value was previously meant to be
   retrieved, therefore we ensure whatever library using the old way
   gets fixed (they only exist in private tree at the moment since the
   NPTL work is still progressing).
2) the previous number was allocated in a range causing an undefined
   instruction trap on kernels not supporting that syscall and it was
   determined that allocating it in a range returning -ENOSYS would be
   much nicer for libraries trying to determine if the feature is
   present or not.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-04-29 22:08:33 +01:00
Lennert Buytenhek
8443b165f1 [PATCH] ARM: 2657/1: export ixp2000_pci_config_addr
Patch from Lennert Buytenhek

Export ixp2000_pci_config_addr, to be used by the IXDP2800 platform
setup code to coordinate booting the master and slave NPU.

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-04-29 21:58:15 +01:00
Russell King
0f7ad45039 [PATCH] ARM: AMBA CLCD: X resolutions must be multiples of 16
We ignore the bottom 4 bits of the X resolution, so we should
round X resolutions up to the nearest multiple of 16.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-28 10:46:15 +01:00
Russell King
82235e9170 [PATCH] ARM: Fix AMBA CLCD fb driver for 32bpp
We were supporting 24bpp.  However, the pixel organisation in
memory was 0RGB, so it was 24bpp in 32bit words.  This means
we're actually supporting 32bpp and not 24bpp.

Also, add a check to ensure that we don't exceed the available
framebuffer when changing display resolutions.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-28 10:43:52 +01:00
Russell King
c4d12b98ea [PATCH] ARM: Fix AMBA CLCD fb driver for 1bpp/STN mono panels
Fix the AMBA CLCD framebuffer driver for 1bpp modes and STN
monochrome LCD panels.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-28 10:38:19 +01:00
Russell King
ea3f4eaca0 [PATCH] ARM: Add further explaination for clk_get()
clk_get() comments can be confusing.  Add extra explaination of
the dev and id parameters to ensure correct usage.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-27 18:19:55 +01:00
Deepak Saxena
2fac6f3fec [PATCH] ARM: 2653/1: Fix memset and memzero macro double-reference of parameters
Patch from Deepak Saxena

The current memset() and memzero() macros on ARM reference the
incoming parameters more than once and this can cause uninted
side-effects. The issue was found while debugging SCTP protocol
and with the specific usage of memzero(skb_put(skb,size),size).
This call would call skb_put(skb,size) twice leading to badness.
The fixed version copies the incoming parameters into local
variables and uses those instead.

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King
2005-04-25 23:40:05 +01:00
Lucas Correia Villa Real
eec99e345e [PATCH] ARM: 2645/1: Adds IIS definitions for the S3C2400
Patch from Lucas Correia Villa Real

Adds IISFCON definitions for the S3C2400 at
include/asm-arm/arch-s3c2400/regs-iis.h.

Signed-off-by: Lucas Correia Villa Real
Signed-off-by: Ben Dooks
Signed-off-by: Russell King
2005-04-25 23:13:15 +01:00
Lucas Correia Villa Real
bd7b170201 [PATCH] ARM: 2644/1: Adds S3C2400 support to uncompress.h
Patch from Lucas Correia Villa Real

The S3C2400 doesn't have a cpuid information stored anywhere. This patch adds
support to the S3C2400 at include/asm-arm/arch-s3c2400/uncompress.h by
initializing the cpuid variable to the S3C2410, as they share the same
routine. The GSTATUS1 pin is then used only if not compiling for the S3C2400.

Signed-off-by: Lucas Correia Villa Real
Signed-off-by: Ben Dooks
Signed-off-by: Russell King
2005-04-25 23:12:50 +01:00
Lucas Correia Villa Real
b7ebcc108a [PATCH] ARM: 2641/1: Adds S3C2400_SPPIN_nCS to arch-s3c2410/regs-spi.h
Patch from Lucas Correia Villa Real

Adds a define to the SPI Card Select bit on the S3C2400 into
include/asm-arm/arch-s3c2410/regs-spi.h

Signed-off-by: Lucas Correia Villa Real
Signed-off-by: Russell King
2005-04-25 18:40:31 +01:00
Lucas Correia Villa Real
a334242136 [PATCH] ARM: 2640/1: Adds DRAM/BANKSIZE_MASK definitions for S3C2400
Patch from Lucas Correia Villa Real

Adds DRAM refresh definitions and sets the BANKSIZE_MASK for the S3C2400 on
include/asm-arm/arch-s3c2400/regs-mem.h

Signed-off-by: Lucas Correia Villa Real
Signed-off-by: Ben Dooks
Signed-off-by: Russell King
2005-04-25 18:36:50 +01:00
Hugh Dickins
6119be0bba [PATCH] freepgt: arm FIRST_USER_ADDRESS PAGE_SIZE
ARM define FIRST_USER_ADDRESS as PAGE_SIZE (beyond the machine vectors when
they are mapped low), and use that definition in place of locally defined
MIN_MAP_ADDR.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-19 13:29:21 -07:00
Russell King
cc56449f53 [PATCH] ARM: fix debug macros
Fix debug EBSA285 and RiscPC debugging macros to detect whether the
MMU is enabled.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-17 16:28:31 +01:00
Russell King
652a12ef98 [PATCH] ARM: showregs
Fix show_regs() to provide a backtrace.  Provide a new __show_regs()
function which implements the common subset of show_regs() and die().
Add prototypes to asm-arm/system.h

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-17 15:50:36 +01:00
akpm@osdl.org
7a228aaa87 [PATCH] arm: add comment about dma_supported()
)


From: Russell King <rmk+lkml@arm.linux.org.uk>

The ARM dma_supported() is rather basic, and I don't think it takes into
account everything that it should do (eg, whether the mask agrees with what
we'd return for GFP_DMA allocations).  Note this.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16 15:23:57 -07:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00