Commit graph

622 commits

Author SHA1 Message Date
Barry Song
d86bfb1600 Blackfin: initial XIP support
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:48 -05:00
Barry Song
8916a1499d Blackfin: fix the section name of init_thread_union
Use the common attribute rather than setting the section name directly.
The common linker script defines expect the newer naming.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:48 -05:00
Barry Song
6feda3a653 Blackfin: replace harcoded define with proper THREAD_SIZE macro
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:48 -05:00
Jie Zhang
0afc272cc6 Blackfin: fix relocation errors with large initramfs images
Since we are now discarding .exit.text at runtime instead of link time, we
need to place all .text sections ahead of the .data sections.  Otherwise,
a really large attached initramfs may cause link errors as it pushes the
PC relative relocations behind the limits of the Blackfin ISA (~16meg).
The instructions in the .exit.text are unable to call back into the .text
sections leading to a link failure.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:48 -05:00
Yi Li
0d152c27e3 Blackfin: SMP: make core timers per-cpu clock events for HRT
SMP systems require per-cpu local clock event devices in order to enable
HRT support.  One a BF561, we can use local core timer for this purpose.
Originally, there was one global core-timer clock event device set up for
core A.

To accomplish this feat, we need to split the gptimer0/core timer logic
so that each is a standalone clock event.  There is no requirement that
we only have one clock event source anyways.  Once we have this, we just
define per-cpu clock event devices for each local core timer.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:48 -05:00
Michael Hennerich
edd0799250 Blackfin: gpio: use shorter name
The gpio label size is 16 char, but the current code uses a longer name
resulting in chopped display.  So use a shorter name.

Reported-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:46 -05:00
Sonic Zhang
a3a6a59019 Blackfin: dma-mapping: fix thinko in constant optimization
Make sure the non-constant version of the dma_sync functions actually
complete instead of recursively calling itself forever.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:46 -05:00
Sonic Zhang
5792ab2a0a Blackfin: MPU: handle caches for reserved memory
We weren't handling the user-specified cache behavior for the reserved
memory regions (via mem=/max_mem=).  The no-MPU code already takes care
of this, so add support to the MPU code as well.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:46 -05:00
Barry Song
e18e7dd334 Blackfin: fix MPU page permission masks overflow when dealing with async memory
Attempting to use the MPU while doing XIP out of parallel flash hooked up
to the async memory bus would often result in random crashes as the MPU
slowly corrupted memory.

The fallout here is that the async banks gain MPU protection from user
space too.  So any accesses have to go through the mmap() interface rather
than just using hardcoded pointers.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:46 -05:00
Sonic Zhang
b635f1912d Blackfin: allow boards to register early devices
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09 00:30:45 -05:00
Sonic Zhang
7fe1a91281 blackfin,kgdb: Do not put PC in gdb_regs into retx.
In blackfin, kgdb is running in delayed exception IRQ5 other than in
exception IRQ3 directly.  Register reti other than retx in pt_regs is
the kgdb return address. So, don't put PC in gdb_regs into retx.

CC: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-01-07 11:58:37 -06:00
Jason Wessel
0fde663708 blackfin,kgdb,probe_kernel: Cleanup probe_kernel_read/write
Blackfin needs it own arch specific probe_kernel_read() and
probe_kernel_write().

This was moved out of the kgdb code and into the
arch/blackfin/maccess.c, because it is a generic kernel api.

The arch specific kgdb.c for blackfin was cleaned of all functions
which exist in the kgdb core that do the same thing after resolving
the probe_kernel_read() and probe_kernel_write().  This also
eliminated the need for most of the #include's.

CC: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-01-07 11:58:36 -06:00
Linus Torvalds
525995d77c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (88 commits)
  Blackfin: Convert BUG() to use unreachable()
  Blackfin: define __NR_recvmmsg
  Blackfin: drop duplicate sched_clock
  Blackfin: NOMPU: skip DMA ICPLB hole when it is redundant
  Blackfin: MPU: add missing __init markings
  Blackfin: add support for TIF_NOTIFY_RESUME
  Blackfin: kgdb_test: clean up code a bit
  Blackfin: convert kgdbtest to proc_fops
  Blackfin: convert cyc2ns() to clocksource_cyc2ns()
  Blackfin: ip0x: pull in asm/portmux.h for P_xxx defines
  Blackfin: drop unused ax88180 resources
  Blackfin: bf537-stamp: add ADF702x network driver resources
  Blackfin: bf537-stamp: add CAN resources
  Blackfin: bf537-stamp: add AD5258 i2c address
  Blackfin: bf537-stamp: add adau1761 i2c address
  Blackfin: bf537-stamp: add adau1371 i2c address
  Blackfin: bf537-stamp: add ADP8870 resources
  Blackfin: bf537-stamp: kill AD714x board-specific Kconfigs
  Blackfin: bf537-stamp: update ADP5520 resources
  Blackfin: bf537-stamp: add ADXL346 orientation sensing support
  ...
2009-12-16 10:52:35 -08:00
Linus Torvalds
74f3ae7434 Merge branch 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  modpost: fix segfault with short symbol names
  module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
  Kbuild: clear marker out of modpost
  module: make MODULE_SYMBOL_PREFIX into a CONFIG option
  ARM: unexport symbols used to implement floating point emulation
  ARM: use unified discard definition in linker script
  x86: don't export inline function
  sparc64: don't export static inline pci_ functions
2009-12-16 10:47:24 -08:00
Alan Jenkins
9e1b9b8072 module: make MODULE_SYMBOL_PREFIX into a CONFIG option
The next commit will require the use of MODULE_SYMBOL_PREFIX in
.tmp_exports-asm.S.  Currently it is mixed in with C structure
definitions in "asm/module.h".  Move the definition of this arch option
into Kconfig, so it can be easily accessed by any code.

This also lets modpost.c use the same definition.  Previously modpost
relied on a hardcoded list of architectures in mk_elfconfig.c.

A build test for blackfin, one of the two MODULE_SYMBOL_PREFIX archs,
showed the generated code was unchanged.  vmlinux was identical save
for build ids, and an apparently randomized suffix on a single "__key"
symbol in the kallsyms data).

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Mike Frysinger <vapier@gentoo.org> (blackfin)
CC: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-12-15 16:28:26 +10:30
Mike Frysinger
8a833110f1 Blackfin: drop duplicate sched_clock
The Blackfin sched_clock() func is pretty much a duplicate of the common
version, so just punt it.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:56 -05:00
Mike Frysinger
a797a0e242 Blackfin: NOMPU: skip DMA ICPLB hole when it is redundant
Normally there is no user-reserved memory after the DMA region which means
there is no user-reserved ICPLB coverage.  So the DMA hole can be covered
by the large hole that is always added to cover up to the async bank.  We
only need an explicit DMA whole when we also add an explicit mapping for
the user-reserved memory.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:54 -05:00
Mike Frysinger
0a68b5341d Blackfin: MPU: add missing __init markings
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:53 -05:00
Barry Song
d1be2e485b Blackfin: add support for TIF_NOTIFY_RESUME
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:52 -05:00
Mike Frysinger
88f7c2fb0f Blackfin: kgdb_test: clean up code a bit
- document simple global symbols
- convert printk to pr_*
- clean up spurious whitespace
- use min_t()

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:50 -05:00
Alexey Dobriyan
397b761cc4 Blackfin: convert kgdbtest to proc_fops
The read_proc and write_proc interfaces are going to be removed in the
common kernel code.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:49 -05:00
Mike Frysinger
c768a943fd Blackfin: convert cyc2ns() to clocksource_cyc2ns()
The former no longer exists.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:47 -05:00
Barry Song
dd3b0e3e6a Blackfin: dma-mapping.h: flesh out missing DMA mapping functions
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:16:01 -05:00
Barry Song
a00b4fe5ce Blackfin: workaround anomaly 05000310
While fetching instructions at the boundary of L1 instruction SRAM, a false
External Memory Addressing Error might be triggered.  We should ignore this
and continue on our way to avoid random crashes.

Because hardware errors are not exact in the Blackfin architecture, we need
to catch a few more common cases when the code flow changes and the signal
is finally delivered.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:59 -05:00
Mike Frysinger
340a1be1ee Blackfin: drop ptrace() write support for fixed code/bootrom
These regions are either read-only and won't work anyways (bootrom), or
we don't want people screwing with them because they're shared between
all processes (fixed code).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:57 -05:00
Barry Song
e187837b6f Blackfin: MPU: support XIP in async flash memory
The NOMPU code already supported executing in the async banks, so this
brings the MPU code in line.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:54 -05:00
Barry Song
d45e8db1b2 Blackfin: drop 4KB reserve at end of memory
The point of this small chunk was to avoid anomaly 05000310.  This never
really seemed to do what it was intended though -- no valid CPLBs exist
over the reserved memory, and there is often memory before it anyways (due
to the uClinux MTD and/or reserved DMA region).  Plus, it doesn't address
the L1 instruction case.

So drop this chunk as it wastes memory and is affront to humanity.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:50 -05:00
Barry Song
c45c06596e Blackfin: support smaller uncached DMA chunks for memory constrained systems
When working with 8 meg systems, forcing a 1 meg DMA chunk heavily cuts
into the available resources.  So support smaller chunks to better cover
needs for these systems.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:48 -05:00
Mike Frysinger
2f5a086402 Blackfin: finish_atomic_sections: optimize the RTS step
No point in returning to userspace just to have it immediately perform the
RTS step.  We have to update the PC anyways, so do the RTS too.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:42 -05:00
Sonic Zhang
0d5e35940b Blackfin: kgdb: punt dead code
None of these vars/funcs were being used.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:40 -05:00
Mike Frysinger
e34132f40b Blackfin: reject NULL callback in set_dma_callback()
It makes no sense to call this function with a NULL callback.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:37 -05:00
Mike Frysinger
8c0b4351cc Blackfin: gptimers: use unsigned timer/group ids
Since we always use these ids as unsigned values, and we have some assert
code to make sure they don't exceed a limit, avoid signed issues.

Reported-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:30 -05:00
Robin Getz
dbc5e6989e Blackfin: don't walk VMAs when oopsing
If we're double faulting, then we have to assume the VMAs are not safe as
broken pointers here will prevent full trace output for the double fault.
Shouldn't be a big problem though as rarely is a double fault caused by
code in userspace.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:28 -05:00
Philippe Gerum
d2685fb7b4 Blackfin/ipipe: prepare status bitops for SMP support
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Li Yi <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:12 -05:00
Mike Frysinger
13a1320cf5 Blackfin: don't give CPU its own line in traps output
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:05 -05:00
Robin Getz
7a1a8cc190 Blackfin: announce current cpu rev when booting
User reports rarely include full information, so include this important
tidbit up front.  It's also good to know at a glance in general.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:15:01 -05:00
Mike Frysinger
d2e015d65f Blackfin: convert DMA mutex to an atomic and drop redundant code
The DMA channel status field was encoding redundant info wrt the DMA MMR
config register, and it was doing an incomplete job of checking all DMA
channels (some drivers write directly to the config register).  So drop
the tristate field in favor of a binary atomic field.  This simplifies
the code in general, removes the implicit need for sleeping, and forces
the suspend code to handle all channels properly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:14:18 -05:00
Mike Frysinger
bbc51e97d3 Blackfin: push down asm/ includes and out of bfin-global.h
Avoid including unnecessary headers all the time as well as circular
includes with core requirements.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:14:14 -05:00
Michael Hennerich
621dd24743 Blackfin: bf538: add support for extended GPIO banks
The GPIOs on ports C/D/E on the BF538/BF539 do not behave the same way as
the other ports on the part and the same way as all other Blackfin parts.
The MMRs are programmed slightly different and they cannot be used to
generate interrupts or wakeup a sleeping system.  Since these guys don't
fit into the existing code, create a simple gpiolib driver for them.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:14:05 -05:00
Mike Frysinger
5cd82a6d58 Blackfin: calculate on-chip lengths at link time rather than run time
Since the link sizes never change at runtime, push the calculation out to
the linker script to save some useless calculation costs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:55 -05:00
Bernd Schmidt
13048f8866 Blackfin: improve async bank access checking (for cross-banks & XIP)
The access_ok() function did not accept ranges within the async banks
which made it impossible to do XIP in flash.  Fixing that also showed
that the current bfin_mem_access_type() code did not work with accesses
that spanned async banks (like a file system).  So split out and fix the
async bank checks so that all these scenarios work as expected.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:52 -05:00
Michael Hennerich
cb5ae60f7a Blackfin: convert DMA code to a proper bitmap
Rather than using our own data structures that basically boil down to a
bitmap, use the standard bitmap functions.

Reported-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:51 -05:00
Barry Song
89e84eeace Blackfin: add some bounds checking to peripheral_request
The requested peripheral is turned into an index into some state arrays,
so make sure the calculated index doesn't exceed the index.  This occurs
when using bogus pin values or the define headers are screwed up.  Now
we'll notice right away that something needs fixing instead of trying to
track down random memory corruption.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:46 -05:00
Yi Li
298571249a Blackfin: use common code for cycle->nanosecond conversion
No point in redefining things that common code already does for us.  Also
use CYC2NS_SCALE_FACTOR to better reflect reality and for better precision.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:43 -05:00
Yi Li
ceb33be95a Blackfin: unify sched_clock() handling between clock sources
Currently sched_clock() is only defined when using CYCLES as a clock
source.  Declare sched_clock() in common code and mark it with notrace to
prevent invoking sched_clock() recursively (because ftrace uses
sched_clock() to record time).

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:41 -05:00
Yi Li
f7036d649c Blackfin: fix gptimer0 clock source compile warning
Some of the clocksource prototypes were updated, but the gptimer0 func was
missed in the process.  Not a big issue as the argument is ignored, but we
should fix the compile warning anyways.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15 00:13:38 -05:00
Thomas Gleixner
239007b844 genirq: Convert irq_desc.lock to raw_spinlock
Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
2009-12-14 23:55:33 +01:00
Al Viro
f8b7256096 Unify sys_mmap*
New helper - sys_mmap_pgoff(); switch syscalls to using it.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11 06:44:29 -05:00
Linus Torvalds
4ef58d4e2a Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (42 commits)
  tree-wide: fix misspelling of "definition" in comments
  reiserfs: fix misspelling of "journaled"
  doc: Fix a typo in slub.txt.
  inotify: remove superfluous return code check
  hdlc: spelling fix in find_pvc() comment
  doc: fix regulator docs cut-and-pasteism
  mtd: Fix comment in Kconfig
  doc: Fix IRQ chip docs
  tree-wide: fix assorted typos all over the place
  drivers/ata/libata-sff.c: comment spelling fixes
  fix typos/grammos in Documentation/edac.txt
  sysctl: add missing comments
  fs/debugfs/inode.c: fix comment typos
  sgivwfb: Make use of ARRAY_SIZE.
  sky2: fix sky2_link_down copy/paste comment error
  tree-wide: fix typos "couter" -> "counter"
  tree-wide: fix typos "offest" -> "offset"
  fix kerneldoc for set_irq_msi()
  spidev: fix double "of of" in comment
  comment typo fix: sybsystem -> subsystem
  ...
2009-12-09 19:43:33 -08:00
Linus Torvalds
2588465bad Merge branch 'bkl-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'bkl-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  mn10300: Remove the BKL from sys_execve
  m68knommu: Remove the BKL from sys_execve
  m68k: Remove the BKL from sys_execve
  h83000: Remove BKL from sys_execve
  frv: Remove the BKL from sys_execve
  blackfin: Remove the BKL from sys_execve
  um: Remove BKL from mmapper
  um: Remove BKL from random
  s390: Remove BKL from prng
2009-12-09 08:07:51 -08:00
Jiri Kosina
d014d04386 Merge branch 'for-next' into for-linus
Conflicts:

	kernel/irq/chip.c
2009-12-07 18:36:35 +01:00
André Goddard Rosa
af901ca181 tree-wide: fix assorted typos all over the place
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04 15:39:55 +01:00
Graf Yang
aa23531ce5 Blackfin: fix SMP build error in start_thread()
Commit d5ce528c8e (Blackfin: convert irq/process to asm-generic)
incorrectly merged the smp and non-smp cases of start_thread() causing the
L1 stack to be setup on the SMP port instead of the UP port.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-25 02:38:01 -05:00
Jie Zhang
46b60faf8c Blackfin: fix typo in ptrace poking
Commit c014e15a2f (Blackfin: convert ptrace to new memory functions)
introduced a copy & paste typo in the ptrace poke data/text handling.  The
access_process_vm() function call was telling it to read instead of write.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-25 02:35:43 -05:00
André Goddard Rosa
7bae2c4898 Blackfin: fix cache Kconfig typo
The Kconfig option is "BFIN_EXTMEM_WRITETHROUGH", not "..._WRITETROUGH".

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-25 02:35:35 -05:00
Michael Hennerich
865bddfbf7 Blackfin: fix suspend/resume failure with some on-chip ROMs
Some Blackfin on-chip ROMs utilize some MDMA channels during the suspend
and resume process, but don't clean up after themselves.  So manually
clear all DMA channels when resuming since no DMA could have been running
at this point in time.  Now Linux should be able to work regardless of any
laziness on the part of the on-chip ROM or boot loader.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-25 02:35:33 -05:00
John Kacur
25708a5fe7 blackfin: Remove the BKL from sys_execve
This looks like a cut-and-paste job. For example, compare this
function to sys_execve in arch/x86/kernel/process_64.c and it is
almost line by line the same, except the one in x86 nolonger has the
big kernel lock. All of the functions called between the lock are
generic and not specific to blackfin - thus, I believe it is safe to
remove the bkl here.

Signed-off-by: John Kacur <jkacur@redhat.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
LKML-Reference: <alpine.LFD.2.00.0910130007240.3658@localhost.localdomain>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-10-14 17:18:14 +02:00
Alexey Dobriyan
d43c36dc6b headers: remove sched.h from interrupt.h
After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-10-11 11:20:58 -07:00
Thomas Chou
59bd00c850 Blackfin: fix framebuffer mmap bug for nommu
The patch added a special get_unmapped_area for framebuffer which
was hooked to the file ops in drivers/video/fbmem.c.

This is needed since v2.6.29-rc1 where nommu vma management was
updated, and mmap of framebuffer caused kernel BUG panic. You may turn
on "Debug the global anon/private NOMMU mapping region tree" config to
such message.

As Documentation/nommu-mmap.txt said,
"To provide shareable character device support, a driver must provide
a file->f_op->get_unmapped_area() operation. The mmap() routines will
call this to get a proposed address for the mapping."

With this change, user space should call mmap for framebuffer using
shared map. Or it can try shared map first, then private map if
failed. This shared map usage is now consistent between mmu and nommu.

The sys_ file may not be a good place for this patch. But there is a
similar one for sparc. I tested a similar patch on nios2nommu, though
I don't have a blackfin board to test.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-08 00:58:15 -04:00
Mike Frysinger
48dee09325 Blackfin: cplbinfo: drop d_path() hacks
The cplbinfo was using d_path() to figure out which cpu/cplb was being
parsed.  As Al pointed out, this isn't exactly reliable as it assumes the
static VFS path to be unchanged, and it's just poor form.  So use the
proc_create_data() to properly (and internally) pass the exact cpu/cplb
requested to the parser function.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-07 04:48:04 -04:00
Robin Getz
96f1050d3d Blackfin: mass clean up of copyright/licensing info
Bill Gatliff & David Brownell pointed out we were missing some
copyrights, and licensing terms in some of the files in
./arch/blackfin, so this fixes things, and cleans them up.

It also removes:
 - verbose GPL text(refer to the top level ./COPYING file)
 - file names (you are looking at the file)
 - bug url (it's in the ./MAINTAINERS file)
 - "or later" on GPL-2, when we did not have that right

It also allows some Blackfin-specific assembly files to be under a BSD
like license (for people to use them outside of Linux).

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-07 04:36:26 -04:00
john stultz
10f03f1a24 Blackfin: convert to use arch_gettimeoffset()
Convert Blackfin to use GENERIC_TIME via the arch_getoffset()
infrastructure, reducing the amount of arch specific code we need to
maintain.

I've taken my best swing at converting this, but I'm not 100% confident
I got it right.  My cross-compiler is now out of date (gcc4.2) so I
wasn't able to check if it compiled. Any assistance from arch
maintainers or testers to get this merged would be great.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-07 04:36:20 -04:00
Tim Abbott
4a5e35135d blackfin: Cleanup linker script using new linker script macros.
Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Cc: Bryan Wu <cooloney@kernel.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-24 17:16:22 -07:00
Yi Li
5bf9cbef99 Blackfin: update ftrace for latest toolchain
The mcount support that was finally added to the Blackfin gcc port isn't
exactly the same as what ftrace was developed against.  Now that the final
gcc version is in place, update the ftrace code to match.

While updating this, fix the swapped arguments to the tracer (signature is
(ip, parent_ip) while we were passing (parent_ip, ip)).

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:52 -04:00
Mike Frysinger
ea426e6c62 Blackfin: unify cache init functions
The CPLB implementations (mpu/nompu) had exact copies of the cacheinit
code.  Even the i/d cache functions are largely the same.  So unify them
both in the common kernel cache code.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:49 -04:00
Graf Yang
e78feaaeeb Blackfin: swap clocksource ratings for gptimer/cycles
The cycles clocksource is a higher resolution than the gptimer one, so
make sure the ratings field reflects this.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:48 -04:00
Mike Frysinger
3289651a97 Blackfin: update ftrace_push_return_trace() breakage
Commit 71e308a239 updated ftrace_push_return_trace() prototype but didn't
update the Blackfin ftrace code, so things broke.  Since we don't support
the new stuff yet, call it with stub values.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:47 -04:00
Bernd Schmidt
4663f6ef25 Blackfin: add ICPLB coverage for async banks
When doing XIP, we need to execute out of the async banks, so we need
ICPLBs to allow this.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:42 -04:00
Mingquan Pan
4a3e53c1c4 Blackfin: use KERN_ALERT in all kgdb_test output
Most messages are already using KERN_ALERT, so be consistent to make
things easier to check with test scripts.

Signed-off-by: Mingquan Pan <grace.pan@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:40 -04:00
Michael Hennerich
05d17dfaab Blackfin: fix spelling in a few comments
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:33 -04:00
Yi Li
b6dbde27dd Blackfin: use raw_smp_processor_id() in exception code
When preempt debugging is enabled, smp_processor_id() may utilize the
"current" structure.  This may not be safe to access under all exceptions
due to it being in dynamically allocated memory.  So in exception code,
make sure we use raw_smp_processor_id() instead to get at the real value
directly.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:32 -04:00
Michael Hennerich
00dd66d012 Blackfin: remove useless duplicated assignment in gpio code
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:31 -04:00
Ingo Molnar
8d7ac69ffa Blackfin: Fix link errors with binutils 2.19 and GCC 4.3
Not sure whether this has been reported/fixed before.

Today I built a Blackfin tool-chain from scratch for -tip testing,
and it triggers:

 arch/blackfin/kernel/vmlinux.lds:1238: undefined section `.data_a_l1' referenced in expression

and:

 arch/blackfin/kernel/vmlinux.lds:1238: undefined section `.text_data_l1'
referenced in expression

Now i dont have any way to test this linker script, but it now at
least builds fine after fixing what appears to be typos in those
assert statements.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:30 -04:00
Mike Frysinger
926494943b Blackfin: optimize fixed code handling for the most common case
The majority of the time we are returning to user space, it is not in the
fixed atomic code region.  So rather than branch to a function where we
check the PC and return, do the check inline and branch only when needed.

Also, tweak some of the fixed code handling based on assumptions we are
aware of but cannot be expressed in C.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:28 -04:00
Mike Frysinger
3aa670419a Blackfin: punt dead cache locking code
No one uses these functions, and some are duplicate of existing C code.  So
just punt the whole thing.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:25 -04:00
Yi Li
c4baebf268 Blackfin: do not trace the exception handler
Since the exception handler cannot cause exceptions, we cannot trace it
without easily causing double faults and crashing the system.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:23 -04:00
Yi Li
eb7bd9c461 Blackfin: cleanup sync handling when enabling/disabling cplbs
The handling of updating the [DI]MEM_CONTROL MMRs does not follow proper
sync procedures as laid out in the Blackfin programming manual.  So rather
than audit/fix every call location, create helper functions that do the
right things in order to safely update these MMRs.  Then convert all call
sites to use these new helper functions.

While we're fixing the code, drop the workaround for anomaly 05000125 as
that anomaly applies to old versions of silicon that we do not support.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:19 -04:00
Roel Kluin
ac860751eb Blackfin: fix read buffer overflow
Check whether index is within bounds before testing the element.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 22:10:13 -04:00
Graf Yang
01b9f4b0ed Blackfin: improve double fault debug handling
Since the hardware only provides reporting for the last exception handled,
and the values are valid only when executing the exception handler, we
need to save the context for reporting at a later point.  While we do this
for one exception, it doesn't work properly when handling a second one as
the original exception is clobbered by the double fault.  So when double
fault debugging is enabled, create a dedicated shadow of these values and
save/restore out of there.  Now the crash report properly displays the
first exception as well as the second one.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:57 -04:00
Graf Yang
36b8412886 Blackfin: fix MPU handling of invalid memory accesses
The protect_page() function was incorrectly setting up the hardware tables
based on possible access capabilities rather than the actual requested
values.  This means we would grant more access to mmap-ed pages than we
should have.  Once we fix this, we need to tweak the signal generated by
such accesses to aline ourselves with other ports.  This allows the LTP
mmap0{5,6,7} cases to run properly.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:55 -04:00
Sonic Zhang
407505dc01 Blackfin: do not try displaying the end of the stack
The end of the stack may not be valid (and that could be OK), so do not
attempt to parse it.  If we do, we might use a bad pointer in kernel space
which makes things panic().

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:50 -04:00
Robin Getz
837ec2d56c Blackfin: catch hardware errors earlier during booting
Allow hardware errors to be caught during early portions of booting, and
leave something in the shadow console that people can use to debug their
system with (to be printed out by the bootloader on next reset).

This enables the hardare error interrupts in head.S, allowing us to find
hardware errors when they happen (well, as much as you can with a hardware
error) and prints out the trace if it is enabled.  This will catch errors
(like booting the wrong image on a 533) which previously resulted in a
infinite loop/hang, as well as random hardware errors before before
setup_arch().

To disable this debug only feature - turn off EARLY_PRINTK.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:44 -04:00
Robin Getz
3f871feaf3 Blackfin: add an early shadow console
Add a memory based shadow console to keep a copy of the printk buffer in a
location which can be found externally.  This allows bootloaders to locate
and utilize the log buffer in case of silent (early/resume/etc...) crashes.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:43 -04:00
Mike Frysinger
53e18df745 Blackfin: add support for common FDPIC ptrace requests
The FDPIC arches support a standard set of ptrace requests so rather than
define our own custom API, hook up those requests for common code to
leverage.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:31:42 -04:00
Robin Getz
2f812c0bd5 Blackfin: clean up early memory setup code
Remove code duplication, and only print out memory warnings when they are
an actual problem.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:54 -04:00
Mike Frysinger
a769094061 Blackfin: fix module reloc handling for all memory regions
The current module relocation code has spotty handling wrt different
memory regions (like L1 instruction).  Rather than try to fix each
little spot, use the new common memory functions to greatly simplify
everything and make sure it is always correct.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:52 -04:00
Mike Frysinger
459fec9073 Blackfin: cleanup module section checking
The current module section handling code has a lot of verbose statements
copied and pasted throughout which makes it pretty hard to digest at a
glance.  By unifying all of these up front, it is a lot easier to quickly
get an idea of what is actually going on.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:51 -04:00
Mike Frysinger
70deca9f9c Blackfin: convert malloc()/memset() to zalloc() in module code
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:49 -04:00
Mike Frysinger
dc6b1ac984 Blackfin: cleanup printk() usage in module code
Convert all printk() statements to use the common pr_xxx() funcs and use
the new pr_fmt() function to standardize all of the output.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:48 -04:00
Robin Getz
22532578ee Blackfin: reject outdated/unused/wrong relocation types
All kernel modules are required to be built with -mlong-calls and thus
should not generate any of these relocations.  If they do, it means the
module has not been compiled properly, so rather than trying to handle
them (and running into random run time errors) just error out on module
load to force the module to be compiled correctly.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:46 -04:00
Mike Frysinger
c014e15a2f Blackfin: convert ptrace to new memory functions
Now that we have a Blackfin memory function to figure out how to properly
access the different regions, drop the custom memory range checks in our
ptrace code and use that.  It makes the code nicer and fixes bugs where
the ptrace logic wasn't handling all the different regions.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:45 -04:00
Mike Frysinger
18070dd669 Blackfin: cleanup traps decode_address() a bit
Unify the address display to shrink the code, and add missing decoding of
a few special Blackfin-specific regions (L1 ROM and MMRs).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:43 -04:00
Philippe Gerum
f4e129399c Blackfin: inline I-pipe bypass code in ret_from_exception
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:42 -04:00
Philippe Gerum
6b8019c85e Blackfin: allow high priority domains to preempt schedule_tail()
ret_from_fork is always entered with hw interrupts off, which prevents
real-time domains to preempt the Linux kernel during part of the
initial context switch to the new task, which could in turn raise the
worst-case latency figures.

To avoid this, stall the root domain stage in the interrupt pipeline
to keep the scheduling tail code free from Linux-handled IRQs, then
enable hardware interrupts again.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:33 -04:00
Philippe Gerum
bc569f1a77 Blackfin: export show_stack() to modules
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:32 -04:00
Philippe Gerum
b9c7eb498d Blackfin: fix misnomer of some I-pipe helpers
__ipipe_{stall, unstall}_root_raw() identifiers may leave the reader
under the impression that only the virtual state is affected by these
operations, which is wrong. Pick names following the convention used
throughout the interrupt pipeline code.

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:30 -04:00
Philippe Gerum
d8ca63955a Blackfin: checkpatch --file arch/blackfin/kernel/ipipe.c
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:29 -04:00
Robin Getz
ae4f073c40 Blackfin: make EVT3->EVT5 lowering more robust wrt IPEND[4]
We handle many exceptions at EVT5 (hardware error level) so that we can
catch exceptions in our exception handling code.  Today - if the global
interrupt enable bit (IPEND[4]) is set (interrupts disabled) our trap
handling code goes into a infinite loop, since we need interrupts to be
on to defer things to EVT5.

Normal kernel code should not trigger this for any reason as IPEND[4] gets
cleared early (when doing an interrupt context save) and the kernel stack
there should be sane (or something much worse is happening in the system).
But there have been a few times where this has happened, so this change
makes sure we dump a proper crash message even when things have gone south.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16 21:28:28 -04:00
Tejun Heo
384be2b18a Merge branch 'percpu-for-linus' into percpu-for-next
Conflicts:
	arch/sparc/kernel/smp_64.c
	arch/x86/kernel/cpu/perf_counter.c
	arch/x86/kernel/setup_percpu.c
	drivers/cpufreq/cpufreq_ondemand.c
	mm/percpu.c

Conflicts in core and arch percpu codes are mostly from commit
ed78e1e078dd44249f88b1dd8c76dafb39567161 which substituted many
num_possible_cpus() with nr_cpu_ids.  As for-next branch has moved all
the first chunk allocators into mm/percpu.c, the changes are moved
from arch code to mm/percpu.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
2009-08-14 14:45:31 +09:00
Graf Yang
5bc6e3cfe6 Blackfin: add CPLB entries for Core B on-chip L1 SRAM regions
The Blackfin SMP port was missing CPLB entries for Core B on-chip L1 SRAM
regions.  Any code that attempted to use these would wrongly crash due to
a CPLB miss.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-07-16 01:52:51 -04:00