Commit Graph

336 Commits

Author SHA1 Message Date
Mel Gorman eb33575cf6 [ARM] Double check memmap is actually valid with a memmap has unexpected holes V2
pfn_valid() is meant to be able to tell if a given PFN has valid memmap
associated with it or not. In FLATMEM, it is expected that holes always
have valid memmap as long as there is valid PFNs either side of the hole.
In SPARSEMEM, it is assumed that a valid section has a memmap for the
entire section.

However, ARM and maybe other embedded architectures in the future free
memmap backing holes to save memory on the assumption the memmap is never
used. The page_zone linkages are then broken even though pfn_valid()
returns true. A walker of the full memmap must then do this additional
check to ensure the memmap they are looking at is sane by making sure the
zone and PFN linkages are still valid. This is expensive, but walkers of
the full memmap are extremely rare.

This was caught before for FLATMEM and hacked around but it hits again for
SPARSEMEM because the page_zone linkages can look ok where the PFN linkages
are totally screwed. This looks like a hatchet job but the reality is that
any clean solution would end up consumning all the memory saved by punching
these unexpected holes in the memmap. For example, we tried marking the
memmap within the section invalid but the section size exceeds the size of
the hole in most cases so pfn_valid() starts returning false where valid
memmap exists. Shrinking the size of the section would increase memory
consumption offsetting the gains.

This patch identifies when an architecture is punching unexpected holes
in the memmap that the memory model cannot automatically detect and sets
ARCH_HAS_HOLES_MEMORYMODEL. At the moment, this is restricted to EP93xx
which is the model sub-architecture this has been reported on but may expand
later. When set, walkers of the full memmap must call memmap_valid_within()
for each PFN and passing in what it expects the page and zone to be for
that PFN. If it finds the linkages to be broken, it assumes the memmap is
invalid for that PFN.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-05-18 11:22:24 +01:00
Guennadi Liakhovetski 9abf137c6d ARM: ARCH_MXC should select HAVE_CLK
All i.MX platforms support <linux/clk.h> calls and should select HAVE_CLK.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-05-05 09:36:44 +02:00
Catalin Marinas 0516e4643c [ARM] 5489/1: ARM errata: Data written to the L2 cache can be overwritten with stale data
This patch is a workaround for the 460075 Cortex-A8 (r2p0) erratum. It
configures the L2 cache auxiliary control register so that the Write
Allocate mode for the L2 cache is disabled.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-30 20:13:00 +01:00
Catalin Marinas 855c551f5b [ARM] 5490/1: ARM errata: Processor deadlock when a false hazard is created
This patch adds a workaround for the 458693 Cortex-A8 (r2p0)
erratum. It sets the corresponding bits in the auxiliary control
register so that the PLD instruction becomes a NOP.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-30 20:12:59 +01:00
Catalin Marinas 7ce236fcd6 [ARM] 5487/1: ARM errata: Stale prediction on replaced interworking branch
This patch adds the workaround for the 430973 Cortex-A8 (r1p0..r1p2)
erratum. The BTAC/BTB is now flushed at every context switch.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-30 20:12:50 +01:00
Catalin Marinas 9cba3ccc8f [ARM] 5488/1: ARM errata: Invalidation of the Instruction Cache operation can fail
This patch implements the recommended workaround for erratum 411920
(ARM1136, ARM1156, ARM1176).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-30 20:12:47 +01:00
Russell King 10993374f8 Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 2009-04-28 21:41:01 +01:00
Philipp Zabel 36b5437f33 [ARM] pxa: remove unused CPU_FREQ_PXA Kconfig symbol
cpufreq drivers for pxa2xx/3xx are now built-in automatically as soon as
CPU_FREQ is enabled.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-04-27 11:45:42 +08:00
Guennadi Liakhovetski fd87e08172 [ARM] pxa: remove duplicate select statements from Kconfig
ARCH_PXA selects HAVE_CLK and COMMON_CLKDEV twice in arch/arm/Kconfig.
Remove the second entry.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-04-27 11:45:35 +08:00
Kevin Hilman c5b736d093 davinci: major rework of clock, PLL, PSC infrastructure
This is a significant rework of the low-level clock, PLL and Power
Sleep Controller (PSC) implementation for the DaVinci family.  The
primary goal is to have better modeling if the hardware clocks and
features with the aim of DVFS functionality.

Highlights:
- model PLLs and all PLL-derived clocks
- model parent/child relationships of PLLs and clocks
- convert to new clkdev layer
- view clock frequency and refcount via /proc/davinci_clocks

Special thanks to significant contributions and testing by David
Brownell.

Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-23 09:31:00 -07:00
Kevin Hilman 9232fcc999 davinci: add default Kconfig, add HAVE_IDE
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-23 09:27:57 -07:00
Russell King 542f869f18 Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainline into devel
Conflicts:
	arch/arm/mm/Kconfig

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-03-26 23:10:11 +00:00
Paulius Zaleckas 1df621ae2f Gemini: gpiolib based GPIO support v2
v2:
- update copyrights

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
2009-03-26 10:06:27 +02:00
Paulius Zaleckas 59d3a193f1 ARM: Add Gemini architecture v3
Adds support for Cortina Systems Gemini family CPUs:
http://www.cortina-systems.com/products/category/18

v3:
- fixed __io(a) to be defined as __typesafe_io(a)

v2:
- #include <asm/io.h> -> <linux/io.h>
- remove asm/system.h include
- revorked mm.c to use named initializers
- removed "empty" dma.h
- updated copyrights

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
2009-03-26 10:06:08 +02:00
Russell King fbf2b1f9cf Merge branch 'highmem' into devel 2009-03-24 22:47:45 +00:00
Eric Miao 14c6b5e7ad [ARM] pxa: add base support for Marvell PXA910
Signed-off-by: Bin Yang <bin.yang@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-03-23 10:11:35 +08:00
Eric Miao e2bb6650ef [ARM] pxa: add GPIO support for pxa168
Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-03-23 10:11:34 +08:00
Eric Miao 40305a583a [ARM] pxa: add iWMMXt support for pxa168
Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-03-23 10:11:34 +08:00
Eric Miao 49cbe78637 [ARM] pxa: add base support for Marvell's PXA168 processor line
"""The Marvell® PXA168 processor is the first in a family of application
processors targeted at mass market opportunities in computing and consumer
devices. It balances high computing and multimedia performance with low
power consumption to support extended battery life, and includes a wealth
of integrated peripherals to reduce overall BOM cost .... """

See http://www.marvell.com/featured/pxa168.jsp for more information.

  1. Marvell Mohawk core is a hybrid of xscale3 and its own ARM core,
     there are many enhancements like instructions for flushing the
     whole D-cache, and so on

  2. Clock reuses Russell's common clkdev, and added the basic support
     for UART1/2.

  3. Devices are a bit different from the 'mach-pxa' way, the platform
     devices are now dynamically allocated only when necessary (i.e.
     when pxa_register_device() is called). Description for each device
     are stored in an array of 'struct pxa_device_desc'. Now that:

     a. this array of device description is marked with __initdata and
        can be freed up system is fully up

     b. which means board code has to add all needed devices early in
        his initializing function

     c. platform specific data can now be marked as __initdata since
        they are allocated and copied by platform_device_add_data()

  4. only the basic UART1/2/3 are added, more devices will come later.

Signed-off-by: Jason Chagas <chagas@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-03-23 10:11:34 +08:00
Eric Miao bd5ce43323 [ARM] pxa: introduce plat-pxa for PXA common code and add DMA support
1. introduce folder of 'arch/arm/plat-pxa' for common code across different
   PXA processor families

2. initially moved DMA code into plat-pxa

3. common code in <mach/dma.h> moved into <plat/dma.h>, new processors
   should implement its own <mach/dma.h>, provide the following required
   definitions and '#include <plat/dma.h>' in the end:

   - DMAC_REGS_VIRT for mapped virtual address of the DMA registers'
     physical I/O memory

Signed-off-by: Eric Miao <eric.miao@marvell.com>
2009-03-23 10:11:31 +08:00
Nicolas Pitre 053a96ca11 [ARM] add CONFIG_HIGHMEM option
Here it is... HIGHMEM for the ARM architecture.  :-)

If you don't have enough ram for highmem pages to be allocated and still
want to test this, then the cmdline option "vmalloc=" can be used with
a value large enough to force the highmem threshold down.

Successfully tested on a Marvell DB-78x00-BP Development Board with
2 GB of RAM.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
2009-03-15 21:01:22 -04:00
Dmitry Artamonow 7bc35b56f3 [ARM] 5407/1: SA1100: drop broken for ages iPAQ h3800 support
Code has never been in buildable state since initial
merge.

Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-21 16:39:07 +00:00
Ryan Mallon f373e8c063 [ARM] 5373/2: Add gpiolib support to AT91
Add support for gpiolib, including debugfs output, to the AT91 family.
The at91_get/set_gpio_value calls still exist since they are used by the
atmel serial driver.

Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-12 10:45:08 +00:00
F. Duncan M. Haldane 6e38a2ba79 Staging: Kconfig for ARCH=arm,8300, cris
The new Kconfig option to build "staging" drivers (code in
drivers/staging/) is seen in all except three architectures (arm, h8300,
cris), because in these cases arch/$ARCH/Kconfig does NOT source
drivers/Kconfig.

This patch adds the source "drivers/staging/Kconfig" to
arch/$ARCH/Kconfig for these three exceptional cases.

Signed-off-by: Duncan Haldane <duncan_h@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-01-06 13:51:38 -08:00
Russell King a663a71e42 Merge git://git.marvell.com/orion into devel 2008-12-20 17:40:03 +00:00
Lennert Buytenhek b95a13d79c [ARM] mv78xx0: implement GPIO and GPIO interrupt support
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-12-20 12:27:13 -05:00
Lennert Buytenhek 4c21343005 [ARM] Kirkwood: implement GPIO and GPIO interrupt support
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-12-20 12:26:57 -05:00
Russell King 828aac2ee2 Merge branch 'for-rmk' of git://git.pengutronix.de/git/ukl/linux-2.6 into devel 2008-12-19 19:46:52 +00:00
Russell King fdb0a1a67e Merge branch 'next-merged' of git://aeryn.fluff.org.uk/bjdooks/linux into devel 2008-12-18 22:15:30 +00:00
Ben Dooks a08ab63761 [ARM] S3C64XX: Initial arch directory
Add the initial PLAT_S3C64XX support files
and directory structure.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-12-15 21:47:24 +00:00
Daniel Silverstone 72880ad866 [ARM] KS8695: Fixup the KS8695 GPIO to be GPIOLIB
This patch is as small a change as possible to the KS8695 GPIO layer
to use GPIOLIB to allow the generic GPIO expanders and the like to
be compiled.

As a side-effect, we also remove __init_or_module from several
functions which could be called by drivers such as i2c-gpio which
could plausibly be compiled into a non-modular kernel.

Signed-off-by: Daniel Silverstone <dsilvers@simtec.co.uk>
Signed-off-by: Vincent Sanders <vince@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2008-12-14 11:34:47 +00:00
Uwe Kleine-Koenig 7971db5a4b Merge branch 'for-rmk-misc' into for-rmk 2008-12-12 11:18:54 +01:00
Uwe Kleine-König 72cca72a6c remove a superfluous kconfig type definition
It's either

        bool
        default y

or

        def_bool y

but not a mixture of both.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2008-12-12 11:17:07 +01:00
Uwe Kleine-König 2fcfe6b872 netx: add support for clockevents
This is based on a patch by Luotao Fu <lfu@pengutronix.de>

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Luotao Fu <lfu@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-12-09 21:57:59 +01:00
Uwe Kleine-König 21edecd355 netx: enable GENERIC_TIME
the needed infrastructure is already in place, only selecting
GENERIC_TIME was missing.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-12-09 21:57:58 +01:00
wanzongshun 7ec80ddf04 [ARM] 5338/1: Add Nuvoton W90P910 Platform support
Add Nuvoton W90X900 ARM9 plat support to linux arm tree,
Now, this patch include only W90P910 EVB of W90P910 CPU,
Its driver is nothing.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-12-03 21:57:16 +00:00
Russell King 657e1de8e7 Merge branch 'for-rmk-realview' of git://linux-arm.org/linux-2.6 into devel 2008-12-01 17:53:45 +00:00
Jon Callan 4c3ea37171 RealView: Add Cortex-A9 support to the EB board
This patch adds the necessary definitions and Kconfig entries to enable
Cortex-A9 (ARMv7 SMP) tiles on the RealView/EB board.

Signed-off-by: Jon Callan <Jon.Callan@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2008-12-01 14:54:56 +00:00
Russell King 112243034c Merge branch 'clks' into devel 2008-11-30 17:46:52 +00:00
Russell King ae696fd532 [ARM] ep93xx: convert to clkdev and match clocks by struct device where possible
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-30 17:11:49 +00:00
Russell King 31bccbf392 Merge branch 'clps7500' into devel
Conflicts:

	arch/arm/Kconfig
2008-11-27 12:39:43 +00:00
Russell King e902be56cb Merge branches 'core' and 'clks' into devel 2008-11-27 12:39:14 +00:00
Russell King 8c3abc7d90 [ARM] pxa: convert to clkdev and match clocks by struct device where possible
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 12:38:23 +00:00
Russell King 71a06da08c [ARM] versatile: convert to clkdev and lookup clocks by device name
People often point to the Integrator/Versatile/Realview
implementations to justify using the consumer name as the sole
selector for clocks.

Eliminate this excuse by changing the Versatile implementation, so
it provides a better example of how it should be done.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 12:38:22 +00:00
Russell King d72fbdf01f [ARM] integrator: convert to clkdev and lookup clocks by device name
People often point to the Integrator/Versatile/Realview
implementations to justify using the consumer name as the sole
selector for clocks.

Eliminate this excuse by changing the Integrator implementation, so
it provides a better example of how it should be done.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 12:38:22 +00:00
Russell King cf30fb4a4f [ARM] realview: convert to clkdev and lookup clocks by device name
People often point to the Integrator/Versatile/Realview
implementations to justify using the consumer name as the sole
selector for clocks.

Eliminate this excuse by changing the Realview implementation, so
it provides a better example of how it should be done.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 12:38:21 +00:00
Russell King 635f0258e5 [ARM] clps7500: remove support
The CLPS7500 platform has not built since 2.6.22-git7 and there
seems to be no interest in fixing it.  So, remove the platform
support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 12:38:11 +00:00
Russell King c750815e2d [ARM] Arrange for platforms to select appropriate CPU support
Rather than:

	config CPU_BLAH
		bool
		depends on ARCH_FOO || MACH_BAR
		default y if ARCH_FOO || MACH_BAR

arrange for ARCH_FOO and MACH_BAR to select CPU_BLAH directly.

Acked-by: Nicolas Pitre <nico@marvell.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Acked-by: Brian Swetland <swetland@google.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Acked-by: Nicolas Bellido <ml@acolin.be>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 12:38:00 +00:00
Ingo Molnar 4944dd62de Merge commit 'v2.6.28-rc2' into tracing/urgent 2008-10-27 10:50:54 +01:00
Linus Torvalds 0d876c6a96 Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] pxa: corgi backlight driver should not select ssp drivers
  [ARM] 5321/1: Kirkwood: fix typo in Makefile
  [ARM] 5320/1: fix assembly constraints in implementation of do_div()
  [ARM] 5318/1: Swap the PRRR and NMRR values in proc-v7.S
  [ARM] 5316/1: AT91: oops (regression) fix on gpio irq
  [ARM] msm: vreg interface to msm7k pmic
  [ARM] msm: dma: various basic dma improvements and bugfixes
  [ARM] msm: clock: provide clk_*() api support for
  [ARM] msm: clean up iomap and devices
  [ARM] msm: add proc_comm support, necessary for clock and power control
  [ARM] msm: rename ARCH_MSM7X00A to ARCH_MSM
  [ARM] pxa/spitz: fix unbalance parenthesis in header file spitz.h
  [ARM] pxa: update {corgi,spitz}_defconfig to favor SPI-based drivers
  [ARM] pxa: fix the corgi_ssp.c dependency issue in {corgi,spitz}_defconfig
  Revert "[ARM] pxa/corgi: remove now unused corgi_ssp.c and corgi_lcd.c"
2008-10-23 16:06:49 -07:00