Commit Graph

248 Commits

Author SHA1 Message Date
Kristoffer Ericson
b863f46e6a sh: Trivial fix for hp6xx build.
The IRQ3 define was removed when asm-sh/irq.h was cleaned up,
this updates the hp6xx header to use the IRQ number directly.

Signed-off-by: Kristoffer Ericson <kristoffer_e1@hotmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-28 19:45:59 +09:00
Paul Mundt
310f7963c2 sh: Fixup __cmpxchg() compile breakage with gcc4.
As reported by Manuel:

When I build linux with GCC-4.x and enable
CONFIG_CC_OPTIMIZE_FOR_SIZE linking fails with this error:

  LD      .tmp_vmlinux1
  kernel/built-in.o: In function '__cmpxchg_called_with_bad_pointer'
  make[1]: *** [.tmp_vmlinux1] Error 1
  make: *** [_all] Error 2

This ended up being an inlining problem, fixed by explicitly
including linux/compiler.h and grabbing the definitions from there.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-28 17:26:19 +09:00
Paul Mundt
3afb209a43 sh: Fix bogus regs pointer in do_IRQ().
SH-3 and SH-4 were trampling the register, and SH-2 wasn't even
setting it in the first place. This ended up with some rather
broken behaviour in the sysrq show_regs().

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-14 13:03:35 +09:00
Mike Frysinger
fbd168461e sh: Convert struct ioctls to static defines.
This fixes up some compile failures for cases where we don't include
all of the headers. There's not much point in keeping the struct
references around anyways, most of the others have been converted
already.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-12 16:12:45 +09:00
Paul Mundt
72a121ba6d sh: Define missing __NR_readahead.
For some reason sh was missing __NR_readahead, even though the
syscall was wired up, and the slot was reserved. Caught with
dwmw2's missing syscall checker.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-12 15:55:19 +09:00
Paul Mundt
39e688a94b sh: Revert lazy dcache writeback changes.
These ended up causing too many problems on older parts,
revert for now..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-05 19:46:47 +09:00
Paul Mundt
87e29cacb7 sh: Use L1_CACHE_BYTES for .data.cacheline_aligned.
Previously this was using a hardcoded 32, use L1_CACHE_BYTES for
cacheline alignment instead.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-05 14:13:26 +09:00
Stuart Menefy
9432f96803 sh: Clear UBC when not in use.
This takes care of tearing down the UBC so it's not inadvertently
left configured at the next context switch time. Failure to do
this results in spurious SIGTRAPs in certain debug sequences.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-05 14:13:25 +09:00
Paul Mundt
9c57548f17 sh: rts7751r2d board updates.
This tidies up some of the rts7751r2d mess and gets it booting
again. Update the defconfig, too.

Signed-off-by: Masayuki Hosokawa <hosokawa@ace-jp.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-15 18:20:52 +09:00
Paul Mundt
e65fa9f59e sh: Kill off dead bigsur and ec3104 boards.
Neither of these have had any maintenance in years, and there's
no interest in keeping them straggling along. These have already
been slated for removal some time, so finally just get rid of them.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-14 15:06:09 +09:00
Paul Mundt
db2e1fa3f0 sh: Revert TLB miss fast-path changes that broke PTEA parts.
This ended up causing problems for older parts (particularly ones
using PTEA). Revert this for now, it can be added back in once it's
had some more testing.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-14 14:13:10 +09:00
Paul Mundt
c7666e72cf sh: define dma noncoherent API functions.
sh was missing these, too.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 11:11:22 +09:00
Paul Mundt
fe82891750 sh: Missing flush_dcache_all() proto in cacheflush.h.
Some boards need this, so provide a definition.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 11:09:15 +09:00
Paul Mundt
f5df54dc2e sh: Add cpu-features header to asm/Kbuild.
This is used by the libc for parsing CPU capability flags passed
via the ELF auxvt, needed for run-time selection of atomic opcodes
amongst other things.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:46 +09:00
Paul Mundt
a5ba7d5453 sh: Move __KERNEL__ up in asm/page.h.
This was breaking the uClibc build, which triggered the bogus page
size error.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:46 +09:00
Paul Mundt
b37814352d sh: Fix syscall numbering breakage.
We accidentally broke the inotify syscalls, fix those up again.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:46 +09:00
Paul Mundt
ea9af69481 sh: Local TLB flushing variants for SMP prep.
Rename the existing flush routines to local_ variants for use by
the IPI-backed global flush routines on SMP.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:45 +09:00
Paul Mundt
11c1965687 sh: Fixup cpu_data references for the non-boot CPUs.
There are a lot of bogus cpu_data-> references that only end up working
for the boot CPU, convert these to current_cpu_data to fixup SMP.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:45 +09:00
Paul Mundt
aec5e0e1c1 sh: Use a per-cpu ASID cache.
Previously this was implemented using a global cache, cache
this per-CPU instead and bump up the number of context IDs to
match NR_CPUS.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:45 +09:00
Manuel Lauss
9f8a5e3a44 sh: SH-DMAC compile fixes
This patch does the following:
- remove the make_ipr_irq stuff from dma-sh.c and replace it
  with a simple channel<->irq mapping table.
- add DMTEx_IRQ constants for sh4 cpus
- fix sh7751 DMAE irq number

The SH7780 uses the same IRQs for DMA as other SH4 types, so
I put the constants on top of the dma.h file.

Other CPU types need to #define their own DMTEx_IRQ contants
in their appropriate header.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:45 +09:00
Paul Mundt
26b7a78c55 sh: Lazy dcache writeback optimizations.
This converts the lazy dcache handling to the model described in
Documentation/cachetlb.txt and drops the ptep_get_and_clear() hacks
used for the aliasing dcaches on SH-4 and SH7705 in 32kB mode. As a
bonus, this slightly cuts down on the cache flushing frequency.

With that and the PTEA handling out of the way, the update_mmu_cache()
implementations can be consolidated, and we no longer have to worry
about which configuration the cache is in for the SH7705 case.

And finally, explicitly disable the lazy writeback on SMP (SH-4A).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:44 +09:00
Paul Mundt
7a847f8190 sh: More tidying for large base pages.
There were a few more things that needed fixing up, namely THREAD_SIZE
and the TLB miss handler where certain PTRS_PER_PGD == PTRS_PER_PTE
assumptions were being made.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:44 +09:00
SUGIOKA Toshinobu
106dac130d sh: syscall 300 should be __NR_fstatat64.
syscall number 300 fails while testing with latest LTP
(ltp-full-20061121.tgz) on sh.

sys_fstatat64 is called on syscall 300 (see arch/sh/kernel/syscalls.S),
and __ARCH_WANT_STAT64 is defined in include/asm-sh/unistd.h, so
following patch seems correct.

Signed-off-by: SUGIOKA Toshinobu <sugioka@itonet.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:44 +09:00
Paul Mundt
f413d0d9fa sh: Use a jump call table for debug trap handlers.
This rips out most of the needlessly complicated sh_bios and kgdb
trap handling, and forces it all through a common fast dispatch path.
As more debug traps are inserted, it's important to keep them in sync
for all of the parts, not just SH-3/4.

As the SH-2 parts are unable to do traps in the >= 0x40 range, we
restrict the debug traps to the 0x30-0x3f range on all parts, and
also bump the kgdb breakpoint trap down in to this range (from 0xff
to 0x3c) so it's possible to use for nommu.

Optionally, this table can be padded out to catch spurious traps for
SH-3/4, but we don't do that yet..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-13 10:54:43 +09:00
Tilman Schmidt
4564f9e5fd [PATCH] consolidate line discipline number definitions
The line discipline numbers N_* are currently defined for each architecture
individually, but (except for a seeming mistake) identically, in
asm/termios.h.  There is no obvious reason why these numbers should be
architecture specific, nor any apparent relationship with the termios
structure.  The total number of these, NR_LDISCS, is defined in linux/tty.h
anyway.  So I propose the following patch which moves the definitions of
the individual line disciplines to linux/tty.h too.

Three of these numbers (N_MASC, N_PROFIBUS_FDL, and N_SMSBLOCK) are unused
in the current kernel, but the patch still keeps the complete set in case
there are plans to use them yet.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:26 -08:00
Paul Mundt
0a9b0db192 [APM] SH: Convert to use shared APM emulation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-09 17:08:58 +00:00
Ralf Baechle
ec8c0446b6 [PATCH] Optimize D-cache alias handling on fork
Virtually index, physically tagged cache architectures can get away
without cache flushing when forking.  This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13 09:27:08 -08:00
Rafael J. Wysocki
8a102eed9c [PATCH] PM: Fix SMP races in the freezer
Currently, to tell a task that it should go to the refrigerator, we set the
PF_FREEZE flag for it and send a fake signal to it.  Unfortunately there
are two SMP-related problems with this approach.  First, a task running on
another CPU may be updating its flags while the freezer attempts to set
PF_FREEZE for it and this may leave the task's flags in an inconsistent
state.  Second, there is a potential race between freeze_process() and
refrigerator() in which freeze_process() running on one CPU is reading a
task's PF_FREEZE flag while refrigerator() running on another CPU has just
set PF_FROZEN for the same task and attempts to reset PF_FREEZE for it.  If
the refrigerator wins the race, freeze_process() will state that PF_FREEZE
hasn't been set for the task and will set it unnecessarily, so the task
will go to the refrigerator once again after it's been thawed.

To solve first of these problems we need to stop using PF_FREEZE to tell
tasks that they should go to the refrigerator.  Instead, we can introduce a
special TIF_*** flag and use it for this purpose, since it is allowed to
change the other tasks' TIF_*** flags and there are special calls for it.

To avoid the freeze_process()-refrigerator() race we can make
freeze_process() to always check the task's PF_FROZEN flag after it's read
its "freeze" flag.  We should also make sure that refrigerator() will
always reset the task's "freeze" flag after it's set PF_FROZEN for it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13 09:05:49 -08:00
Paul Mundt
41504c3972 sh: SH-MobileR SH7722 CPU support.
This adds CPU support for the SH7722.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:09 +09:00
Paul Mundt
5432143464 sh: Fixup dma_cache_sync() callers.
This now takes a struct device, update all of the callers.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:09 +09:00
Paul Mundt
dc34d312c7 sh: BUG() handling through trapa vector.
Previously we haven't been doing anything with verbose BUG() reporting,
and we've been relying on the oops path for handling BUG()'s, which is
rather sub-optimal.

This switches BUG handling to use a fixed trapa vector (#0x3e) where we
construct a small bug frame post trapa instruction to get the context
right. This also makes it trivial to wire up a DIE_BUG for the atomic
die chain, which we couldn't really do before.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:08 +09:00
Paul Mundt
ec723fbe7e sh: Split out atomic ops logically.
We have a few different ways to do the atomic operations, so split
them out in to different headers rather than bloating atomic.h.
Kernelspace gUSA will take this up to a third implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:08 +09:00
Paul Mundt
b6250e3729 sh: landisk board build fixes.
Get the landisk board building again..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
fce3a24e70 sh: push-switch fixups for work_struct API damage.
INIT_WORK() dropped the data arg, so now we have to stash an extra
pointer and backpedal instead.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
b482ad5dae sh: Shut up csum_ipv6_magic() warnings.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:07 +09:00
Paul Mundt
b9b382dabb sh: Reworked swap cache entry encoding for SH-X2 MMU.
In the 64-bit PTE case there's no point in restricting the encoding
to the low bits of the PTE, we can instead bump all of this up to
the high 32 bits and extend PTE_FILE_MAX_BITS to 32, adopting the
same convention used by x86 PAE.

There's a minor discrepency between the number of bits used for the
swap type encoding between 32 and 64-bit PTEs, but this is unlikely
to cause any problem given the extended offset.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:42:06 +09:00
Alan Cox
be90038a24 [PATCH] tty: preparatory structures for termios revamp
In order to sort out our struct termios and add proper speed control we need
to separate the kernel and user termios structures.  Glibc is fine but the
other libraries rely on the kernel exported struct termios and we need to
extend this without breaking the ABI/API

To do so we add a struct ktermios which is the kernel view of a termios
structure and overlaps the struct termios with extra fields on the end for
now.  (That limitation will go away in later patches).  Some platforms (eg
alpha) planned ahead and thus use the same struct for both, others did not.

This just adds the structures but does not use them, it seems a sensible
splitting point for bisect if there are compile failures (not that I expect
them)

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08 08:28:56 -08:00
Adrian Bunk
7d1362c0d0 [PATCH] cleanup asm/setup.h userspace visibility
Make the contents of the userspace asm/setup.h header consistent on all
architectures:

 - export setup.h to userspace on all architectures
 - export only COMMAND_LINE_SIZE to userspace
 - frv: move COMMAND_LINE_SIZE from param.h
 - i386: remove duplicate COMMAND_LINE_SIZE from param.h
 - arm:
   - export ATAGs to userspace
   - change u8/u16/u32 to __u8/__u16/__u32

Signed-off-by: Adrian Bunk <bunk@stusta.de>
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>
2006-12-07 08:39:46 -08:00
Ralf Baechle
d3fa72e455 [PATCH] Pass struct dev pointer to dma_cache_sync()
Pass struct dev pointer to dma_cache_sync()

dma_cache_sync() is ill-designed in that it does not have a struct device
pointer argument which makes proper support for systems that consist of a
mix of coherent and non-coherent DMA devices hard.  Change dma_cache_sync
to take a struct device pointer as first argument and fix all its callers
to pass it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00
Arnd Bergmann
f5738ceed4 [PATCH] remove kernel syscalls
The last thing we agreed on was to remove the macros entirely for 2.6.19,
on all architectures. Unfortunately, I think nobody actually _did_ that,
so they are still there.

[akpm@osdl.org: x86_64 fix]
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Schafer <gschafer@zip.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:37 -08:00
Jamie Lenehan
ea0f8feaa0 sh: sh775x/titan fixes for irq header changes.
The following moves the creation of IPR interupts into setup-7750.c
and updates a few other things to make it all work after the "Drop
CPU subtype IRQ headers" commit. It boots and runs fine on my titan
board.

 - adds an ipr_idx to the ipr_data and uses a function in the subtype
   code to calculate the address of the IPR registers

 - adds a function to enable individual interrupt mode for externals
   in the subtype code and calls that from the titan board code
   instead of doing it directly.

 - I changed the shift in the ipr_data to be the actual # of bits to
   shift, instead of the numnber / 4 - made it easier to match with
   the manual.

Signed-off-by: Jamie Lenehan <lenehan@twibble.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 12:05:02 +09:00
Paul Mundt
5b67954e80 sh: Fixup pte_mkhuge() build failure.
When hugetlbpage support isn't enabled, this can be bogus.
Wrap it back in _PAGE_FLAGS_HARD to avoid changes to the
base PTE when not aiming for larger sizes.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 11:20:53 +09:00
Paul Mundt
afbfb52e47 sh: stacktrace/lockdep/irqflags tracing support.
Wire up all of the essentials for lockdep..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:40 +09:00
Paul Mundt
c03c69610b sh: Fixup movli.l/movco.l atomic ops for gcc4.
gcc4 gets a bit pissy about the outputs:

include/asm/atomic.h: In function 'atomic_add':
include/asm/atomic.h:37: error: invalid lvalue in asm statement
include/asm/atomic.h:30: error: invalid lvalue in asm output 1
...

this ended up being a thinko anyways, so just fix it up.

Verified for proper behaviour with the older toolchains, too.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:40 +09:00
Paul Mundt
bd156147eb sh: dyntick infrastructure.
This adds basic NO_IDLE_HZ support to the SH timer API so timers
are able to wire it up. Taken from the ARM version, as it fit in
to our API with very few changes needed.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:40 +09:00
Paul Mundt
1d118562c2 sh: Clock framework tidying.
This syncs up the SH clock framework with the linux/clk.h API,
for which there were only some minor changes required, namely
the clk_get() dev_id and subsequent callsites.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:40 +09:00
Paul Mundt
510c72ad2d sh: Fixup various PAGE_SIZE == 4096 assumptions.
There were a number of places that made evil PAGE_SIZE == 4k
assumptions that ended up breaking when trying to play with
8k and 64k page sizes, this fixes those up.

The most significant change is the way we load THREAD_SIZE,
previously this was done via:

	mov	#(THREAD_SIZE >> 8), reg
	shll8	reg

to avoid a memory access and allow the immediate load. With
a 64k PAGE_SIZE, we're out of range for the immediate load
size without resorting to special instructions available in
later ISAs (movi20s and so on). The "workaround" for this is
to bump up the shift to 10 and insert a shll2, which gives a
bit more flexibility while still being much cheaper than a
memory access.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:39 +09:00
Mark Glaisher
db9b99d461 sh: dma-api channel capability extensions.
This extends the SH DMA API for allowing handling of DMA
channels based off of their respective capabilities.

A couple of functions are added to the existing API,
the core bits are register_chan_caps() for registering
channel capabilities, and request_dma_bycap() for fetching
a channel dynamically based off of a capability set.

Signed-off-by: Mark Glaisher <mark.glaisher@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:39 +09:00
Stuart Menefy
c9f0b1c141 sh: KSTK_EIP/KSTK_ESP consistency.
Two of the fields in /proc/[number]/stat are documented in
proc(5) as:

      kstkesp %lu
	     The current value of esp (stack pointer), as
	     found in the kernel stack page for the process.

      kstkeip %lu
	     The current EIP (instruction pointer).

The SH currently prints the the last SP and PC of the process
inside the kernel, while most other archs use the last user
space values.

This patch modifes the SH to display the user space values.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:38 +09:00
Stuart Menefy
9b3a53ab76 sh: TLB miss fast-path optimizations.
Handle simple TLB miss faults which can be resolved completely
from the page table in assembler.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-06 10:45:38 +09:00