Commit Graph

1881 Commits

Author SHA1 Message Date
Ralf Baechle
c5ec1983e4 [MIPS] Eleminate local symbols from the symbol table.
These symbols appear in oprofile output, stacktraces and similar but only
make the output harder to read.  Many identical symbol names such as
"both_aligned" were also being used in multiple source files making it
impossible to see which file actually was meant.  So let's get rid of them.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:59 +00:00
Ralf Baechle
f21d850808 [MIPS] Fulong: don't reinitialize pci_probe_only to it's default value.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:59 +00:00
Ralf Baechle
07c019bccc [MIPS] BCM1480: Use constants instead of magic numbers in PCI code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:59 +00:00
Thomas Bogendoerfer
e2defae5a9 [MIPS] IP28 support
Add support for SGI IP28 machines (Indigo 2 with R10k CPUs)
This work is mainly based on Peter Fuersts work.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:58 +00:00
Ralf Baechle
81149be113 [MIPS] Remove CONFIG_SIBYTE_PT{1120,1125,SWARM}
According to Broadcom the PT systems are production test systems which
never reached customers so no need to keep the fragmentary support we
currently have.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:58 +00:00
Thomas Bogendoerfer
c7c6b39050 [MIPS] Use correct dma flushing in dma_cache_sync()
Not cache coherent R10k systems (like IP28) need to do real cache
invalidates in dma_cache_sync().

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:58 +00:00
Thomas Bogendoerfer
930bff8822 [MIPS] IP28: added cache barrier to assembly routines
IP28 needs special treatment to avoid speculative accesses. gcc
takes care for .c code, but for assembly code we need to do it
manually.

This is taken from Peter Fuersts IP28 patches.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:58 +00:00
Atsushi Nemoto
2064ba23e5 [MIPS] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500
This patch adds support for txx9wdt driver to rbhma3100, rbhma4200 and
rbhma4500 platform.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:58 +00:00
Thomas Bogendoerfer
e9c33572a9 [MIPS] Use real cache invalidate
R10k non coherent machines need a real dma cache invalidate to get rid of
speculative stores in cache.  For other machines this promises a slight
speedup.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Ralf Baechle
87353d8ac3 [MIPS] SMP: Call platform methods via ops structure.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Ralf Baechle
19388fb092 [MIPS] Cleanup pcspeaker platform device registration.
Move registration into the actual platform code instead of making a
desparate attempt at sharing the hand full of likes of code in pcspeaker.c.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Ralf Baechle
0ab7aefc4d [MIPS] MT: Scheduler support for SMT
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Franck Bui-Huu
92b1e6a64a [MIPS] tlbex.c: cleanup debug code
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Franck Bui-Huu
cbdbe07f9d [MIPS] tlbex.c: use __cacheline_aligned instead of __tlb_handler_align
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Franck Bui-Huu
f49b94d8c1 [MIPS] tlbex.c: cleanup include files
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:56 +00:00
Franck Bui-Huu
a9af6041e9 [MIPS] tlbex.c: Cleanup __init usages.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:56 +00:00
Robert P. J. Day
3f4ac2dc05 [MIPS] Delete now-unreferenced i2c-yosemite.h header file.
Given that the corresponding source file i2c-yosemite.c file was
removed in commit daa4a68f90, and that
no one else includes this file, it seems safe to delete it.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:56 +00:00
Lucas Woods
adfb899866 [MIPS] Remove duplicate includes.
Signed-off-by: Lucas Woods <woodzy@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:56 +00:00
Roel Kluin
fa09187c34 [MIPS] ARC: Use strchr instead of strstr.
Use strchr instead of strstr when searching for a single character

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:56 +00:00
Ralf Baechle
33202349ef [MIPS] Remove useless S-cache flushes.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:56 +00:00
Ralf Baechle
526af35e5d [MIPS] Use pte_present instead of open coded test for _PAGE_PRESENT.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Andrew Sharp
48ef2626ae [MIPS] Put cast inside macro instead of all the callers
Since all the callers of the PHYS_TO_XKPHYS macro call with a constant,
put the cast to LL inside the macro where it really should be rather
than in all the callers.  This makes macros like PHYS_TO_XKSEG_UNCACHED
work without gcc whining.

Signed-off-by: Andrew Sharp <andy.sharp@onstor.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Yoichi Yuasa
2206583dd5 [MIPS] clean up au1xxx_irqmap.c include files
Clean up au1xxx_irqmap.c include files.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Yoichi Yuasa
7f3f490061 [MIPS] remove unused mips_machtype
Removed unused mips_machtype.  These are only set but not used.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Christoph Hellwig
417345d8f5 [MIPS] CFE: Make code remotely resemble Linux code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Atsushi Nemoto
8b6c2324bf [MIPS] cleanup tx39/tx49 setup code
Remove some unnecessary codes, includes and files.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Maciej W. Rozycki
619b6e18fc [MIPS] R4000/R4400 daddiu erratum workaround
This complements the generic R4000/R4400 errata workaround code and adds 
bits for the daddiu problem.  In most places it just modifies handwritten 
assembly code so that the assembler is allowed to use a temporary register 
as daddiu may now be treated as a macro that expands to a sequence of li 
and daddu.  It is the AT register or, where AT is unavailable or used 
explicitly for another purpose, an explicitly-named register is selected, 
using the .set at=<reg> feature added recently to gas.  This feature is 
only used if CONFIG_CPU_DADDI_WORKAROUNDS has been set, so if the 
workaround remains disabled, the required version of binutils stays 
unchanged.

 Similarly, daddiu instructions put in branch delay slots in noreorder 
fragments are now taken out of them and the assembler is allowed to 
reorder them itself as possible (which it does making the whole idea of 
scheduling them into delay slots manually questionable).

 Also in the very few places where such a simple conversion was not 
possible, a handcoded longer sequence is implemented.

 Other than that there are changes to code responsible for building the 
TLB fault and page clear/copy handlers to avoid daddiu as appropriate.  
These are only effective if the erratum is verified to be present at the 
run time.

 Finally there is a trivial update to __delay(), because it uses daddiu in 
a branch delay slot.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:55 +00:00
Maciej W. Rozycki
20d60d9973 [MIPS] R4000/R4400 errata workarounds
This is the gereric part of R4000/R4400 errata workarounds.  They include 
compiler and assembler support as well as some source code modifications 
to address the problems with some combinations of multiply/divide+shift 
instructions as well as the daddi and daddiu instructions.

 Changes included are as follows:

1. New Kconfig options to select workarounds by platforms as necessary.

2. Arch top-level Makefile to pass necessary options to the compiler; also 
   incompatible configurations are detected (-mno-sym32 unsupported as 
   horribly intrusive for little gain).

3. Bug detection updated and shuffled -- the multiply/divide+shift problem 
   is lethal enough that if not worked around it makes the kernel crash in 
   time_init() because of a division by zero; the daddiu erratum might 
   also trigger early potentially, though I have not observed it.  On the 
   other hand the daddi detection code requires the exception subsystem to 
   have been initialised (and is there mainly for information).

4. r4k_daddiu_bug() added so that the existence of the erratum can be 
   queried by code at the run time as necessary; useful for generated code 
   like TLB fault and copy/clear page handlers.

5. __udelay() updated as it uses multiplication in inline assembly.

 Note that -mdaddi requires modified toolchain (which has been maintained 
by myself and available from my site for ~4years now -- versions covered 
are GCC 2.95.4 - 4.1.2 and binutils from 2.13 onwards).  The -mfix-r4000 
and -mfix-r4400 have been standard for a while though.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:54 +00:00
Alejandro Martinez Ruiz
2b22c034d0 [MIPS] Converting most array size calculations to use ARRAY_SIZE().
Signed-off-by: Alejandro Martinez Ruiz <alex@flawedcode.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:54 +00:00
Ralf Baechle
161548bf35 [MIPS] tlbex: Cleanup handling of R2 hazards in TLB handlers.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:54 +00:00
Ralf Baechle
6920df4025 [MIPS] Delete unused CONFIG_64BIT_CONTEXT
The merge of the code to use this was never completed so delete it for the
time being.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:54 +00:00
Ralf Baechle
e414004e94 [MIPS] Delete unused CONFIG_DMA_IP32.
The functionality of the former dma-ip32.c has been folded into
dma-default.c.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:54 +00:00
Adrian Bunk
d3883ecebb Remove references to "make dep"
"make dep" is no longer required in kernel 2.6, but was still mentioned
in some places.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-01-28 23:22:13 +01:00
Sam Ravnborg
01ba2bdc6b all archs: consolidate init and exit sections in vmlinux.lds.h
This patch consolidate all definitions of .init.text, .init.data
and .exit.text, .exit.data section definitions in
the generic vmlinux.lds.h.

This is a preparational patch - alone it does not buy
us much good.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-01-28 23:21:17 +01:00
Manuel Lauss
8b798c4d16 i2c-au1550: Convert to platform driver
Convert the i2c-au1550 bus driver to platform driver, and
register a platform device for the Alchemy Db/Pb series of
boards.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:52 +01:00
Gautham R Shenoy
86ef5c9a8e cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()
Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use
get_online_cpus and put_online_cpus instead as it highlights the
refcount semantics in these operations.

The new API guarantees protection against the cpu-hotplug operation, but
it doesn't guarantee serialized access to any of the local data
structures. Hence the changes needs to be reviewed.

In case of pseries_add_processor/pseries_remove_processor, use
cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the
cpu_present_map there.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-25 21:08:02 +01:00
Kay Sievers
af5ca3f4ec Driver core: change sysdev classes to use dynamic kobject names
All kobjects require a dynamically allocated name now. We no longer
need to keep track if the name is statically assigned, we can just
unconditionally free() all kobject names on cleanup.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:40 -08:00
Atsushi Nemoto
06675e6f4f tc35815: Use irq number for tc35815-mac platform device id
The tc35815-mac platform device used a pci bus number and a devfn to
identify its target device, but the pci bus number may vary if some
bus-bridges are found.  Use irq number which is be unique for embedded
controllers.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-22 00:35:23 +00:00
Dmitri Vorobiev
0487de9142 [MIPS] Malta: Fix reading the PCI clock frequency on big-endian
The JMPRS register on Malta boards keeps a 32-bit CPU-endian
value. The readw() function assumes that the value it reads is a
little-endian 16-bit number. Therefore, using readw() to obtain
the value of the JMPRS register is a mistake. This error leads
to incorrect reading of the PCI clock frequency on big-endian
during board start-up.

Change readw() to __raw_readl().

This was tested by injecting a call to printk() and verifying
that the value of the jmpr variable was consistent with current
setting of the JP4 "PCI CLK" jumper.

Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-22 00:35:23 +00:00
Linus Torvalds
c60ecec67a Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Cacheops.h: Fix typo.
  [MIPS] Cobalt: Qube1 has no serial port so don't use it
  [MIPS] Cobalt: Fix ethernet interrupts for RaQ1
  [MIPS] Kconfig fixes for BCM47XX platform
2008-01-14 21:25:39 -08:00
Thomas Bogendoerfer
c43756da94 [MIPS] Cobalt: Qube1 has no serial port so don't use it
Because Qube1 doesn't have a serial chip waiting for transmit fifo empty
takes forever, which isn't a good idea. No prom_putchar/early console
for Qube1 fixes this.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-15 01:04:42 +00:00
Thomas Bogendoerfer
f6c0f32ee8 [MIPS] Cobalt: Fix ethernet interrupts for RaQ1
RAQ1 uses the same interrupt routing as Qube2.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-15 01:04:42 +00:00
Aurelien Jarno
2f02c15a5d [MIPS] Kconfig fixes for BCM47XX platform
The patch below fixes two problems for Kconfig on the BCM47xx platform:

- arch/mips/bcm47xx/gpio.c uses ssb_extif_* functions. Selecting
  SSB_DRIVER_EXTIF makes sure those functions are available.
- arch/mips/pci/pci.c needs, when enabled, platform specific functions,
  which are defined when SSB_PCICORE_HOSTMODE is enabled.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-15 01:04:41 +00:00
Atsushi Nemoto
e452e94e21 [MIPS] Replace 40c7869b69 kludge
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-11 17:05:42 +00:00
WANG Cong
778bc145fe [MIPS] Lasat: Fix built in separate object directory.
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>

[Ralf: The LDSCRIPT script needed fixing, too]

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-11 17:05:42 +00:00
Dmitri Vorobiev
84c21e2542 [MIPS] Malta: Fix software reset on big endian
I noticed that the commit f197465384
(MIPS Tech: Get rid of volatile in core code) broke the software
reset functionality for MIPS Malta boards in big-endian mode.

According to the MIPS Malta board user's manual, writing the magic
32-bit GORESET value into the SOFTRES register initiates board soft
reset. My experimentation has shown that the endianness of the GORESET
integer should thereby be the same as the endianness, which has been
set for the CPU itself. The writew() function used to write the magic
value in the code introduced by the commit mentioned above, however,
swaps bytes for big-endian kernels and transfers 16 bits instead of 32.

The patch below replaces the writew() function by the __raw_writel()
routine, which leaves the byte order intact and transfers the whole
MIPS machine word. Trivial code cleanup (replacing spaces by a tab
and cutting oversized lines to make checkpatch.pl happy) is also
included.

The patch was tested using a Malta evaluation board running in both
BE and LE modes. For both modes, software reset was fully functional
after the change.

P.S. I suspect that the same commit broke the "standby" functionality
for MIPS Atlas boards. However, I did not touch the Atlas code as I
don't have such board at my disposal and also because the linux-mips.org
Web site claims that Atlas support is scheduled for removal.

Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-11 17:05:41 +00:00
Vitaly Wool
1b1c5f0d96 [MIPS] pnx8xxx: move to clocksource
This patch converts PNX8XXX system timer to clocksource restoring PNX8550
support back to live.

Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-11 17:05:41 +00:00
Thomas Bogendoerfer
320167182d [MIPS] Wrong CONFIG option prevents setup of DMA zone.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-11 17:05:41 +00:00
Ralf Baechle
ba820c5c51 [MIPS] Fix CONFIG_BOOT_RAW.
This was broken by 017e3a492683b32d17dcd1b13b279745cc656073 (lmo) /
396a2ae08e (kernel.org).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-07 15:32:04 +00:00
Thomas Bogendoerfer
ce202cbb9e [MIPS] Assume R4000/R4400 newer than 3.0 don't have the mfc0 count bug
This seems as reasonable assumption and gets some SNI machines to work
which currently must rely on the cp0 counter as clocksource.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-07 15:32:03 +00:00
Thomas Bogendoerfer
c990081bf8 [MIPS] Fix IP32 breakage
- suppress master aborts during config read
- set io_map_base
- only fixup end of iomem resource to avoid failing request_resource
  in serial driver
- killed useless setting of crime_int bit, which caused wrong interrupts
- use physcial address for serial port platform device and let 8250
  driver do the ioremap

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-07 15:32:03 +00:00
Sergei Shtylyov
9cfacb790f [MIPS] Alchemy: Fix use of __init code bug exposed by modpost warning
WARNING: vmlinux.o(.text+0x1ca608): Section mismatch: reference to
.init.text: add_wired_entry (between 'config_access' and 'config_read')

by refactoring the code calling add_wired_entry() from config_access() to
a separate function which is called from aau1x_pci_setup(). While at it:

- make some unnecassarily global variables 'static';

- fix the letter case, whitespace, etc. in the comments...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-07 15:32:03 +00:00
Atsushi Nemoto
c4eee283e0 [MIPS] Move inclusing of kernel/time/Kconfig menu to appropriate place
CONFIG_NO_HZ, CONFIG_HIGH_RES_TIMERS should be selected in "Kernel
type" menu, not in "CPU selection" menu.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-07 15:32:03 +00:00
Chris Dearman
bbaf238b5f [MIPS] Ensure that ST0_FR is never set on a 32 bit kernel
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:30 +00:00
Ralf Baechle
4037500ebc [MIPS] time: Delete weak definition of plat_time_init() due to gcc bug.
Frank Rowand <frank.rowand@am.sony.com> reports:

> In linux-2.6.24-rc4 the Toshiba RBTX4927 hangs on boot.
>
> The cause is that plat_time_init() from arch/mips/tx4927/common/
> tx4927_setup.c does not override the __weak plat_time_init() from
> arch/mips/kernel/time.c.  This is due to a compiler bug in gcc 4.1.1.  The
> bug is reported to not exist in earlier versions of gcc, and to be fixed in
> 4.1.2.  The problem is that the __weak plat_time_init() is empty and thus
> gets optimized out of existence (thus the linker is never given the option
> to replace the __weak function).

[ He meant the call to plat_time_init() from time_init() gets optimized away ]

> For more info on the gcc bug see
>
>    http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27781
>
> The attached patch is one workaround.  Another possible workaround

[ His patch adds -fno-unit-at-a-time for time.c ]

> would be to change the __weak plat_time_init() to be a non-empty
> function.

The __weak definition of plat_time_init was only ever meant to be a
migration helper to keep platforms that don't have a plat_time_init
compiling.  A few greps says that all platforms now supply their own
plat_time_init() so the weak definition is no longer needed.  So I
instead delete it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:30 +00:00
Ralf Baechle
d20e47e153 [MIPS] PCI: Make pcibios_fixup_device_resources ignore legacy resources.
There might be other reasons why a resource might be marked as fixed
such as a PCI UART holding the system console but until we use
IORESOURCE_PCI_FIXED that way also this will work.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:29 +00:00
Ralf Baechle
40c7869b69 [MIPS] Atlas, Malta: Don't free firmware memory on free_initmem.
A proper fix for this needs to turn a few MIPS-generic bits which I
don't want at this stage.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:29 +00:00
Sergei Shtylyov
b87bb40b62 [MIPS] Alchemy: fix off by two error in __fixup_bigphys_addr()
the PCI specific code in this function doesn't check for the address range
being under the upper bound of the PCI memory window correctly -- fix this,
somewhat beautifying the code around the check, while at it...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:29 +00:00
Sergei Shtylyov
dd99d9661c [MIPS] Alchemy: fix PCI resource conflict
... by getting the PCI resources back into the 32-bit range -- there's no
need therefore for CONFIG_RESOURCES_64BIT either. This makes Alchemy PCI
work again while currently the kernel skips the bus scan.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:29 +00:00
Yoichi Yuasa
18ca38d26f [MIPS] time: Set up Cobalt's mips_hpt_frequency
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-14 17:34:29 +00:00
Ralf Baechle
ba0f00b9fc [MIPS] Malta: Enable tickless and highres timers.
Most Malta use an FPGA CPU card which rarely is good for more than 40MHz.
So the performance penalta of the regular timer interrupt, especially
for the VSMP kernel model is significant, even at a mere 100Hz.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-09 04:51:10 +00:00
Ralf Baechle
5ef1b9a0f6 [MIPS] Bigsur: Enable tickless and and highres timers.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-09 04:51:10 +00:00
Atsushi Nemoto
8f7e7d67cb qemu: do not enable IP7 blindly
IP7 will be enabled automatically in mips_clockevent_init(), if available.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-09 04:51:10 +00:00
Chris Dearman
6d2d419ffd [MIPS] Don't byteswap writes to display when running bigendian
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-09 04:51:09 +00:00
Linus Torvalds
ceaeee6ad6 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Oprofile: Fix computation of number of counters.
  [MIPS] Alchemy: fix IRQ bases
  [MIPS] Alchemy: replace ffs() with __ffs()
  [MIPS] BCM1480: Fix interrupt routing, take 2.
2007-12-06 09:43:26 -08:00
Ralf Baechle
00a5825332 Fix oprofile configuration breakage
The cleanup 09cadedbdc broke the oprofile
configuration for MIPS by allowing oprofile support to be built for
kernel models where oprofile doesn't have a chance in hell to work.

Just a dependecy list on a number of architectures is - surprise - broken
and should as per past discussions probably in most considered to be
broken in most cases.  So I introduce a dependency for the oprofile
configuration on ARCH_SUPPORTS_OPROFILE.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-12-06 09:37:03 -08:00
Ralf Baechle
5e2862eb5a [MIPS] Oprofile: Fix computation of number of counters.
VSMP kernels will split the available performance counters between the two
processors / cores.  But don't do this when we're not on a VSMP system ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-06 17:15:58 +00:00
Sergei Shtylyov
0e8120e094 [MIPS] Alchemy: fix IRQ bases
Do what the commits commits f3e8d1da38 and
9d360ab4a7 failed to achieve -- actually
convert the Alchemy code to irq_cpu.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-06 17:15:58 +00:00
Sergei Shtylyov
4b36673284 [MIPS] Alchemy: replace ffs() with __ffs()
Fix havoc wrought by commit 56f621c7f6 --
au_ffs() and ffs() are equivalent, that patch should have just replaced one
with another.  Now replace ffs() with __ffs() which returns an unbiased bit
number.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-06 17:15:58 +00:00
Ralf Baechle
f435a91e66 [MIPS] BCM1480: Fix interrupt routing, take 2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-06 17:15:57 +00:00
Ralf Baechle
a6733f2e14 [MIPS] BCM1480: Fix interrupt routing.
The old code did did only work as long as CFE and the kernel were using
the same interrupt numbering ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-03 19:40:26 +00:00
Ralf Baechle
e6a1bb725e [MIPS] Fix build.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-01 00:39:37 +00:00
Thomas Bogendoerfer
68576cf122 IP22ZILOG: fix lockup and sysrq
- fix lockup when switching from early console to real console
 - make sysrq reliable
 - fix panic, if sysrq is issued before console is opened

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-29 09:24:53 -08:00
Joe Perches
b1e3afa001 [MIPS] vpe: Add missing "space"
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:15 +00:00
Richard Knutsson
8142294dda [MIPS] Compliment va_start() with va_end().
Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:15 +00:00
Thomas Bogendoerfer
5b3af8f19f [MIPS] IP22: Fix broken eeprom access by using __raw_readl/__raw_writel
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:14 +00:00
Thomas Bogendoerfer
68de480372 [MIPS] IP22: Fix broken EISA interrupt setup by switching to generic i8259
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:14 +00:00
Ralf Baechle
cce335ae47 [MIPS] 64-bit Sibyte kernels need DMA32.
Sibyte SOCs only have 32-bit PCI.  Due to the sparse use of the address
space only the first 1GB of memory is mapped at physical addresses
below 1GB.  If a system has more than 1GB of memory 32-bit DMA will
not be able to reach all of it.

For now this patch is good enough to keep Sibyte users happy but it seems
eventually something like swiotlb will be needed for Sibyte.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:14 +00:00
Ralf Baechle
940f6b48a1 [MIPS] Only build r4k clocksource for systems that work ok with it.
In particular as-is it's not suited for multicore and mutiprocessors
systems where there is on guarantee that the counter are synchronized
or running from the same clock at all.  This broke Sibyte and probably
others since the "[MIPS] Handle R4000/R4400 mfc0 from count register."
commit.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:14 +00:00
Ralf Baechle
5aa85c9fc4 [MIPS] Handle R4000/R4400 mfc0 from count register.
The R4000 and R4400 have an errata where if the cp0 count register is read
in the exact moment when it matches the compare register no interrupt will
be generated.

This bug may be triggered if the cp0 count register is being used as
clocksource and the compare interrupt as clockevent.  So a simple
workaround is to avoid using the compare for both facilities on the
affected CPUs.

This is different from the workaround suggested in the old errata documents;
at some opportunity probably the official version should be implemented
and tested.  Another thing to find out is which processor versions
exactly are affected.  I only have errata documents upto R4400 V3.0
available so for the moment the code treats all R4000 and R4400 as broken.

This is potencially a problem for some machines that have no other decent
clocksource available; this workaround will cause them to fall back to
another clocksource, worst case the "jiffies" source.
2007-11-26 17:26:14 +00:00
Ralf Baechle
98ce472181 [MIPS] IP32: More interrupt renumbering fixes.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:13 +00:00
Ralf Baechle
526a677069 [MIPS] time: MIPSsim's plat_time_init doesn't need to be irq safe.
It's running early during the bootup process so interrupts are still off.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:13 +00:00
Ralf Baechle
aea6863944 [MIPS] time: Fix negated condition in cevt-r4k driver.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-26 17:26:13 +00:00
Ralf Baechle
72e510654c [MIPS] N32 needs to use the compat version of sys_nfsservctl.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:52 +00:00
Ralf Baechle
30e748a507 [MIPS] irq_cpu: use handle_percpu_irq handler to avoid dropping interrupts.
This matters to any sort of device that is wired to one of the CPU
interrupt pins on an SMP system.  Typically the scenario is most easily
triggered with the count/compare timer interrupt where the same interrupt
number and thus irq_desc is used on each processor.

   CPU A			CPU B

   do_IRQ()
   generic_handle_irq()
   handle_level_irq()
   spin_lock(desc_lock)
   set IRQ_INPROGRESS
   spin_unlock(desc_lock)
				do_IRQ()
				generic_handle_irq()
				handle_level_irq()
				spin_lock(desc_lock)
				IRQ_INPROGRESS set => bail out
   spin_lock(desc_lock)
   clear IRQ_INPROGRESS
   spin_unlock(desc_lock)

In case of the cp0 compare interrupt this means the interrupt will be
acked and not handled or re-armed on CPU b, so there won't be any timer
interrupt until the count register wraps around.

With kernels 2.6.20 ... 2.6.23 we usually were lucky that things were just
working right on VSMP because the count registers are synchronized on
bootup so it takes something that disables interrupts for a long time on
one processor to trigger this one.

For scenarios where an interrupt is multicasted or broadcasted over several
CPUs the existing code was safe and the fix will break it.  There is no
way to know in the interrupt controller code because it is abstracted from
the platform code.  I think we do not have such a setup currently, so this
should be ok.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:52 +00:00
Ralf Baechle
f99f2cc936 [MIPS] Sibyte: Fix name of clocksource.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:51 +00:00
Maciej W. Rozycki
eae5fdc3e5 [MIPS] SNI: s/achknowledge/acknowledge/
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:51 +00:00
Maciej W. Rozycki
3247989ee8 [MIPS] Makefile: Fix canonical system names
The GNU `config.guess' uses "linux-gnu" as the canonical system name.
Fix the list of compiler prefixes checked to spell it correctly.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:51 +00:00
Nigel Stephens
7c3a622d9c [MIPS] vpe: handle halting TCs in an errata safe way.
Adds a JR.HB after halting a TC, to ensure that the TC has really halted.
only modifies the TCSTATUS register when the TC is safely halted.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:50 +00:00
Ralf Baechle
8dfa741f14 [MIPS] Sibyte: Stop timers before programming next even.
We have no guarantee by the generic time code that the timer is stopped
when the ->next_event method is called.  Modifying the Timer Initial Count
register while the timer is enabled has UNPREDICTABLE effect according to
the BCM1250/BCM1125/BCM1125H User Manual.  So stop the timer before
reprogramming.

This is a paranoia fix; no ill effects have been observed previously.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:50 +00:00
Ralf Baechle
622477533d [MIPS] Sibyte: Increase minimum oneshot timer interval to two ticks.
For the old minimum of a single tick a value of zero would be programmed
into the init value register which in the BCM1250/BCM1125/BCM1125H User
Manual in the Timer Special Cases section is documented to have
UNPREDICTABLE effect.

Observable sympthoms of this bug were hangs of several seconds on the
console during bootup and later if both dyntick and highres timer options
were activated.

In theory contiguous mode of the timers is also affected but in an act of
hopeless lack of realism I'll assume nobody will ever configure a KERNEL
for HZ > 500kHz but if so I leave that to evolution to sort out.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:50 +00:00
Yoichi Yuasa
89becf5c0d [MIPS] Lasat: Fix overlap of interrupt number ranges.
The range of MIPS_CPU IRQ and the range of LASAT IRQ overlap.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:50 +00:00
Thomas Bogendoerfer
fcee3faf83 [MIPS] SNI PCIT CPLUS: workaround for b0rked irq wiring of onboard PCI bus 1
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:50 +00:00
Ralf Baechle
f6771dbb27 [MIPS] Fix shadow register support.
Shadow register support would not possibly have worked on multicore
systems.  The support code for it was also depending not on MIPS R2 but
VSMP or SMTC kernels even though it makes perfect sense with UP kernels.

SR sets are a scarce resource and the expected usage pattern is that
users actually hardcode the register set numbers in their code.  So fix
the allocator by ditching it.  Move the remaining CPU probe bits into
the generic CPU probe.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:49 +00:00
Atsushi Nemoto
c6563e85f7 [MIPS] Fix typo in R3000 TRACE_IRQFLAGS code
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:49 +00:00
Ralf Baechle
33b75e5c51 [MIPS] Sibyte: Replace use of removed IO_SPACE_BASE with IOADDR.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:49 +00:00
Roel Kluin
bb856c5b49 [MIPS] iounmap if in vr41xx_pciu_init() pci clock is over 33MHz
iounmap if pci clock is over 33MHz.  Cosmetic because the iomap() in this
case is just a bit of address magic.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Acked-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:49 +00:00
Ralf Baechle
a8401fa57f [MIPS] BCM1480: Remove duplicate acknowledge of timer interrupt.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:49 +00:00
Ralf Baechle
07a80e4924 [MIPS] Sibyte: pin timer interrupt to their cores.
Or strange things will happen.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:48 +00:00
Ralf Baechle
a57c228935 [MIPS] Qemu: Add early printk, your friend in a cold night.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-15 23:21:48 +00:00