Switch to GENERIC_TIME by using the ccount register as a clock source.
Signed-off-by: NJohannes Weiner <hannes@cmpxchg.org>
Signed-off-by: NChris Zankel <chris@zankel.net>

platform_get/set_rtc_time() is not implemented by any of the supported
xtensa platforms.  Remove the facility completely.

The initial seconds for xtime come from read_persistent_clock() which
returns just 0 in the generic implementation.  Platforms that sport a
persistent clock can implement this function.

This is needed to implement the ccount as a clock source.
Signed-off-by: NJohannes Weiner <hannes@cmpxchg.org>
Signed-off-by: NChris Zankel <chris@zankel.net>

Current xtensa implementation of sched_clock() is the same as the
generic one.  Just remove it, the weak symbol in kernel/sched_clock.c
will be used instead.
Signed-off-by: NJohannes Weiner <hannes@cmpxchg.org>
Signed-off-by: NChris Zankel <chris@zankel.net>

Support for the S6105 IP Camera Reference Design Kit.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NOskar Schirmer <os@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

The linker script should not assume a fix offset in memory for the
kernel, this is platform-specific, so let the platform set it.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Support for the Stretch S6000 Xtensa core variant.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NOskar Schirmer <os@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

S6000 core configuration files from Tensilica.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Allow the core variant code to provide irq enable/disable callbacks.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Allow the variant to provide real code.  Add empty dummy Makefiles for
the existing variants.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Add support for !CONFIG_MMU setups.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Add the arch-specific header for flat support on xtensa in preparation
for the Xtensa S6000 nommu port.
Signed-off-by: NOskar Schirmer <os@emlix.com>
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

XCHAL_DATA_WIDTH is the maximum register width, slab caches should be
aligned to this.

Theoretical fix as all variants have had an XCHAL_DATA_WIDTH of 4
(wordsize) for now.  But the S6000 variant will raise this to 16.
Signed-off-by: NOskar Schirmer <os@emlix.com>
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

The current assumption of the memory code is that the first RAM PFN in
the system is 0.

Adjust the relevant code to play well with setups where memory starts
at higher addresses, indicated by PLATFORM_DEFAULT_MEM_START.

The new memory model looks like this:

+----------+--+----------------------+----------------+
|          |  |                      |                |
|          |  |         RAM          |                |
|          |  |                      |                |
+----------+--+----------------------+----------------+
|          |  |                      |                |
+- PFN 0   |  +- min_low_pfn         +- max_low_pfn   +- max_pfn
           |
           +- ARCH_PFN_OFFSET
           +- PLATFORM_DEFAULT_MEM_START >> PAGE_SIZE

The memory map contains pages starting from pfn ARCH_PFN_OFFSET up to
max_low_pfn.  The only zone used right now will span exactly the same
region.

Usually, ARCH_PFN_OFFSET and min_low_pfn are the same value.  Handle
them separately for robustness.  Gapping pages will be in the memory
map but marked as reserved and won't be touched.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

If min_low_pfn is non-zero, the bitmap reserved for bootmem is bigger
than needed.  The number of pages bootmem has to maintain is the range
from min_low_pfn to max_low_pfn.

For now it has only been a theoretical mistake, min_low_pfn was always
zero.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

The second argument to init_bootmem_node() is the PFN to place the
bootmem bitmap at and the third argument is the first PFN on the node.

This is currently backwards but never made any problems as both values
were always zero.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Right now, the xtensa stacktrace code reads the _current_ kernel stack
pointer if nothing is supplied.  With debugging facilities like sysrq
this means that the backtrace of the sysrq-handler is printed instead
of a trace of the given task's stack.

When no stack pointer is specified in show_trace() and show_stack(),
use the stack pointer that comes with the handed in task descriptor to
make stack traces more useful.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Instead of making support code depend on variants or platforms, the
latter should select what they need explicitely.

Otherwise this starts looking weird when support code depends on
!XTENSA_PLATFORM_FOO && !XTENSA_PLATFORM_BAR etc.

This also includes some minor fixlets like converting bool and default
to def_bool and fixing indentation and whitespace errors.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

This constant is defined in all core headers.  Remove the redundant
definition which might error out if other includes lead to inclusion
of <variant/core.h>.
Signed-off-by: NJohannes Weiner <jw@emlix.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* ->put_char changes
 * HIGHMEM is bogus it seems, there is no kmap_atomic() et al
 * some includes
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: NChris Zankel <zankel@tensilica.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

User space can request hardware and/or software time stamping.
Reporting of the result(s) via a new control message is enabled
separately for each field in the message because some of the
fields may require additional computation and thus cause overhead.
User space can tell the different kinds of time stamps apart
and choose what suits its needs.

When a TX timestamp operation is requested, the TX skb will be cloned
and the clone will be time stamped (in hardware or software) and added
to the socket error queue of the skb, if the skb has a socket
associated with it.

The actual TX timestamp will reach userspace as a RX timestamp on the
cloned packet. If timestamping is requested and no timestamping is
done in the device driver (potentially this may use hardware
timestamping), it will be done in software after the device's
start_hard_xmit routine.
Signed-off-by: NPatrick Ohly <patrick.ohly@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

fix the following 'make headers_check' warnings:

  usr/include/asm-xtensa/swab.h:14: include of <linux/types.h> is preferred over <asm/types.h>
  usr/include/asm-xtensa/swab.h:19: found __[us]{8,16,32,64} type without #include <linux/types.h>
Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com>

Add swab.h to kbuild.asm and remove the individual entries from
each arch, mark as unifdef as some arches have some kernel-only
bits inside.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Impact: build fix

Ingo Molnar wrote:

> tip/arch/blackfin/kernel/irqchip.c: In function 'show_interrupts':
> tip/arch/blackfin/kernel/irqchip.c:85: error: 'struct kernel_stat' has no member named 'irqs'
> make[2]: *** [arch/blackfin/kernel/irqchip.o] Error 1
> make[2]: *** Waiting for unfinished jobs....
>

So could move kstat_irqs array to irq_desc struct.

(s390, m68k, sparc) are not touched yet, because they don't support genirq
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Fixes compile breakage as linux/byteorder.h was removed.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Simply replace netdev->priv with netdev_priv().
Signed-off-by: NWang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change 367b8112 moved the platform specific
header files to arch/xtensa/platforms/<platform>/include/platform. These two
file weren't updated.
Signed-off-by: NChris Zankel <chris@zankel.net>

Rely on byteorder.h checking for endianness.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

The last check-in to support the xt2000 development platform was missing
some files.
Signed-off-by: NChris Zankel <chris@zankel.net>

Move all header files for xtensa to arch/xtensa/include and platform and
variant header files to the appropriate arch/xtensa/platforms/ and
arch/xtensa/variants/ directories.

Moving the files gets also rid of all uses of symlinks in the Makefile.

This has been completed already for the majority of the architectures
and xtensa is one out of six missing.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NChris Zankel <chris@zankel.net>

A number of places still use %02x:...:%02x because it's
in debug statements or for no real reason. Make a few
of them use %pM.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The Diamond 232L processor is a pre-configured Xtensa processor tailored
for Linux application.
Signed-off-by: NChris Zankel <chris@zankel.net>

This patch implements a new freezer subsystem in the control groups
framework.  It provides a way to stop and resume execution of all tasks in
a cgroup by writing in the cgroup filesystem.

The freezer subsystem in the container filesystem defines a file named
freezer.state.  Writing "FROZEN" to the state file will freeze all tasks
in the cgroup.  Subsequently writing "RUNNING" will unfreeze the tasks in
the cgroup.  Reading will return the current state.

* Examples of usage :

   # mkdir /containers/freezer
   # mount -t cgroup -ofreezer freezer  /containers
   # mkdir /containers/0
   # echo $some_pid > /containers/0/tasks

to get status of the freezer subsystem :

   # cat /containers/0/freezer.state
   RUNNING

to freeze all tasks in the container :

   # echo FROZEN > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   FREEZING
   # cat /containers/0/freezer.state
   FROZEN

to unfreeze all tasks in the container :

   # echo RUNNING > /containers/0/freezer.state
   # cat /containers/0/freezer.state
   RUNNING

This is the basic mechanism which should do the right thing for user space
task in a simple scenario.

It's important to note that freezing can be incomplete.  In that case we
return EBUSY.  This means that some tasks in the cgroup are busy doing
something that prevents us from completely freezing the cgroup at this
time.  After EBUSY, the cgroup will remain partially frozen -- reflected
by freezer.state reporting "FREEZING" when read.  The state will remain
"FREEZING" until one of these things happens:

	1) Userspace cancels the freezing operation by writing "RUNNING" to
		the freezer.state file
	2) Userspace retries the freezing operation by writing "FROZEN" to
		the freezer.state file (writing "FREEZING" is not legal
		and returns EIO)
	3) The tasks that blocked the cgroup from entering the "FROZEN"
		state disappear from the cgroup's set of tasks.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: export thaw_process]
Signed-off-by: NCedric Le Goater <clg@fr.ibm.com>
Signed-off-by: NMatt Helsley <matthltc@us.ibm.com>
Acked-by: NSerge E. Hallyn <serue@us.ibm.com>
Tested-by: NMatt Helsley <matthltc@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Zankel <chris@zankel.net>

SPIN_LOCK_UNLOCKED() breaks lockdep and is deprecated.
Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NChris Zankel <chris@zankel.net>

I don't know why this was there, but it was dead code.
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Cc: chris@zankel.net
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This patch remove unneeded #include <linux/ide.h>'s.

It also adds a required #include <linux/interrupt.h> that was previously 
implicitely pulled by ide.h
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
[bart: revert change to tests/lkdtm.c (spotted by Stephen Rothwell)]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Remove arch-specific show_mem() in favor of the generic version.

This also removes the following redundant information display:

	- free pages, printed by show_free_areas()
	- pages in swapcache, printed by show_swap_cache_info()

where show_mem() calls show_free_areas(), which calls
show_swap_cache_info().
Signed-off-by: NJohannes Weiner <hannes@saeurebad.de>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Kmem cache passed to constructor is only needed for constructors that are
themselves multiplexeres.  Nobody uses this "feature", nor does anybody uses
passed kmem cache in non-trivial way, so pass only pointer to object.

Non-trivial places are:
	arch/powerpc/mm/init_64.c
	arch/powerpc/mm/hugetlbpage.c

This is flag day, yes.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: NPekka Enberg <penberg@cs.helsinki.fi>
Acked-by: NChristoph Lameter <cl@linux-foundation.org>
Cc: Jon Tollefson <kniht@linux.vnet.ibm.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Matt Mackall <mpm@selenic.com>
[akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c]
[akpm@linux-foundation.org: fix mm/slab.c]
[akpm@linux-foundation.org: fix ubifs]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>