So until MIPS_MT_SMTC_INSTANT_REPLAY has been rewritten to solve this
issue, don't allow selecting it with PREEMPT.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Might be useful for SMP debugging.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
[Rewritten Kconfig bits to deal better fit in the usual pattern of doing
things - Ralf]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
A defconfig file and the 10 lines of code (including comments ...) that
are rotting since lmo commit 6516a42dc8b40c6c00010346dd51496125b16644
don't quite make proper support, so let's trash it.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The generic rtc-ds1742 driver can be used for RBTX4927 and JMR3927
(with __swizzle_addr trick). This patch also removes MIPS local
DS1742 stuff.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This patch adds trivial support for SMARTMIPS extension. This extension
is currently implemented by 4KS[CD] CPUs.
Basically it saves/restores ACX register, which is part of the SMARTMIPS
ASE, when needed. This patch does *not* add any support for Smartmips MMU
features.
Futhermore this patch does not add explicit support for 4KS[CD] CPUs since
they are respectively mips32 and mips32r2 compliant. So with the current
processor configuration, a platform that has such CPUs needs to select
both configs:
CPU_HAS_SMARTMIPS
SYS_HAS_CPU_MIPS32_R[12]
This is due to the processor configuration which is mixing up all the
architecture variants and the processor types.
The drawback of this, is that we currently pass '-march=mips32' option to
gcc when building a kernel instead of '-march=4ksc' for 4KSC case. This
can lead to a kernel image a little bit bigger than required.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Platforms will now have to supply a function dma_device_is_coherent which
returns if a particular device participates in the coherence domain. For
most platforms this function will always return 0 or 1.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[MIPS] signal: do not inline handle_signal()
[MIPS] signal: do not use save_static_function() anymore
[MIPS] signal32: no need to save c0_status register in setup_sigcontext32()
[MIPS] signal32: reduce {setup,restore}_sigcontext32 sizes
[MIPS] signal: factorize debug code
[MIPS] signal: test return value of install_sigtramp()
[MIPS] signal32: remove duplicate code
[MIPS] signal: clean up sigframe structure
[MIPS] signal: do not inline functions in signal-common.h
[MIPS] signals: reduce {setup,restore}_sigcontext sizes
[MIPS] Fix warning in get_user when fetching pointer object from userspace.
[MIPS] Fix eth2 platform device id for jaguar_atx and ocelot_3 platforms
[MIPS] JMR3927 and RBTX49x7 support little endian
[MIPS] RBTX49x7: declare prom_getcmdline()
[MIPS] RTLX: Sprinkle device model code into code to make udev happier.
[MIPS] VPE: Sprinkle device model code into code to make udev happier.
As Andi pointed out: CONFIG_GENERIC_ISA_DMA only disables the ISA DMA
channel management. Other functionality may still expect GFP_DMA to
provide memory below 16M. So we need to make sure that CONFIG_ZONE_DMA is
set independent of CONFIG_GENERIC_ISA_DMA. Undo the modifications to
mm/Kconfig where we made ZONE_DMA dependent on GENERIC_ISA_DMA and set
theses explicitly in each arches Kconfig.
Reviews must occur for each arch in order to determine if ZONE_DMA can be
switched off. It can only be switched off if we know that all devices
supported by a platform are capable of performing DMA transfers to all of
memory (Some arches already support this: uml, avr32, sh sh64, parisc and
IA64/Altix).
In order to switch ZONE_DMA off conditionally, one would have to establish
a scheme by which one can assure that no drivers are enabled that are only
capable of doing I/O to a part of memory, or one needs to provide an
alternate means of performing an allocation from a specific range of memory
(like provided by alloc_pages_range()) and insure that all drivers use that
call. In that case the arches alloc_dma_coherent() may need to be modified
to call alloc_pages_range() instead of relying on GFP_DMA.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Toshiba JMR3927 (RBHMA3100) and RBTX49[23]7 (RBHMA4[24]00) do support both
little and big endian mode (if you flash the right PMON).
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Also convert to use generic kernel/power/Kconfig to make the use of the
shared APM emulation possible.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Currently KEXEC is in "Machine selection", SECCOMP, PM, APM are in
"Executable file formats" menu. Move KEXEC and SECCOMP to "Kernel
type" and PM, APM to new "Power management options" menu. Also
replace "config PM" with kernel/power/Kconfig.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
SMTC pseudo-interrupts between TCs are deferred and queued if the target
TC is interrupt-inhibited (IXMT). In the first SMTC prototypes, these
queued IPIs were serviced on return to user mode, or on entry into the
kernel idle loop. The INSTANT_REPLAY option dispatches them as part of
local_irq_restore() processing, which adds runtime overhead (hence the
option to turn it off), but ensures that IPIs are handled promptly even
under heavy I/O interrupt load.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Now that i8259A_chip uses new irq flow handler select
GENERIC_HARDIRQS_NO__DO_IRQ on some more platforms.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This facility provides three entry points:
ilog2() Log base 2 of unsigned long
ilog2_u32() Log base 2 of u32
ilog2_u64() Log base 2 of u64
These facilities can either be used inside functions on dynamic data:
int do_something(long q)
{
...;
y = ilog2(x)
...;
}
Or can be used to statically initialise global variables with constant values:
unsigned n = ilog2(27);
When performing static initialisation, the compiler will report "error:
initializer element is not constant" if asked to take a log of zero or of
something not reducible to a constant. They treat negative numbers as
unsigned.
When not dealing with a constant, they fall back to using fls() which permits
them to use arch-specific log calculation instructions - such as BSR on
x86/x86_64 or SCAN on FRV - if available.
[akpm@osdl.org: MMC fix]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David Howells <dhowells@redhat.com>
Cc: Wojtek Kaniewski <wojtekka@toxygen.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
__do_IRQ() is needed only by irq handlers that can't use
default handlers defined in kernel/irq/chip.c.
For others platforms there's no need to compile this function
since it won't be used. For those platforms this patch defines
GENERIC_HARDIRQS_NO__DO_IRQ symbol which is used exactly for
this purpose.
Futhermore for platforms which do not use __do_IRQ(), end()
method which is part of the 'irq_chip' structure is not used.
This patch simply removes this method in this case.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (31 commits)
[MIPS] Remove duplicate ISA DMA code for 0 DMA channel case.
[MIPS] Remove unused definition of cpu_to_lelongp()
[MIPS] Remove userspace proofing from <asm/bitops.h>.
[MIPS] Remove old junk left from old atomic_lock.
[MIPS] Use conditional traps for BUG_ON on MIPS II and better.
[MIPS] mips HPT cleanup: make clocksource_mips public
[MIPS] do_IRQ cleanup
[MIPS] Avoid dupliate D-cache flush on R400C / R4400 SC and MC variants.
[MIPS] Remove redundant r4k_blast_icache() calls
[MIPS] Work around bogus gcc warnings.
[MIPS] Fix double inclusions
[MIPS] use generic_handle_irq, handle_level_irq, handle_percpu_irq
[MIPS] IRQ cleanups
[MIPS] mips hpt cleanup: get rid of mips_hpt_init
[MIPS] PB1200: Remove duplicate definitions
[MIPS] Fix alignment hole in struct cache_desc; shrink struct.
[MIPS] Oprofile: kernel support for the R10000.
[MIPS] Remove unused R10000 performance counter definitions.
[MIPS] Add support for kexec
[MIPS] Don't print presence of WAIT instruction on bootup.
...
Fix various Kconfig typos.
Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
When lmo commit 4ef893e0515e8bf336dfbd200884f244869fbb43 was merged to
kernel.org as e73ea273ef patch happily
applied the IP27 segment to IP22. f63f36c18b11e166d0f362ac04dbcd7e6ea23f9e
did fix the effects partially - and with a wrong log message. Now fixed
for real (tm).
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Patch happily applied an Ocelot G patch to Ocelot C when merging
linux-mips.org changeset 91ee9a801e65d2981dfe327d2519c7fc6ab02e6b into
kernel.org as 6ceb6d3ab2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This reverts commit 31473747bd.
Another amazing example of patch(1) messing up - lmo changeset
66e8560d11d02bcadc261498471831a6375ad046 was merged twice to kernel.org
and ended up doing this rubbish job.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The cause of the build errors was a 64-bit kernel being configured in
ocelot_g_defconfig without the code being 64-bit proof. Fixed for now
by limiting 64-bit selection to SYS_SUPPORTS_64BIT_KERNEL if BROKEN.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This patch fixes the compilation errors on PNX8550 and hard-to-track
bug in interrupt handling.
It also corresponds to the latest changes in PNX8550 serial driver.
Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
As per feature-removal-schedule.txt.
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This very small patch adds support for little endian on the virtual QEMU
mips platform. The status of this platform is the same as the big endian
one, ie it is possible to boot a system with init=/bin/sh.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Implement stacktrace interface by using unwind_stack() and enable lockdep
support in Kconfig.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This patch introduces a number of configuration variables. These allow to
specify presence/absence of integrated peripherals found on the MIPS
RM9xxx processor family, based on the particular processor model used.
Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1. MIPS should select SPARSEMEM_STATIC since allocating bootmem in
memory_present() will corrupt bootmap area.
2. pfn_valid() for SPARSEMEM is defined in linux/mmzone.h
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle