Commit Graph

148797 Commits

Author SHA1 Message Date
Graf Yang
d1800fe0e5 Blackfin: drop unused reserve_pda() function
The Per-processor Data Area isn't actually reserved by this function, and
all it ended up doing was issuing a printk(), so punt it.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:49 -04:00
Michael Hennerich
c8d5ea8ccb Blackfin: update gptimers API
First we fix the prototypes for functions that return boolean values by
using "int" rather than "uint16_t".  Then we introduce a get_gptimer_run()
function for checking the current run status of a timer, and then we add a
disable_gptimers_sync() function which parallels disable_gptimers() with
corresponding normal "_sync" behavior.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:47 -04:00
Robin Getz
9ba3c24f10 Blackfin: include system/processor info in dump messages
People often copy & paste crash messages without surrounding context, so
include common useful information like system/processor stats in the crash
summary.  This should smooth over the report/test cycle a bit more.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:47 -04:00
Robin Getz
0acad8dfee Blackfin: add workaround for anomaly 05000461
Returning too fast with a bad RETI can trigger false errors.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:46 -04:00
Robin Getz
a0cab65642 Blackfin: make sure stack is accessible before dumping it
When displaying a crash dump, make sure accessing the stack is safe so
we don't crash at the same time.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:45 -04:00
Robin Getz
b9a3899d59 Blackfin: make deferred hardware errors more exact
Hardware errors on the Blackfin architecture are queued by nature of the
hardware design.  Things that could generate a hardware level queue up at
the system interface and might not process until much later, at which
point the system would send a notification back to the core.

As such, it is possible for user space code to do something that would
trigger a hardware error, but have it delay long enough for the process
context to switch.  So when the hardware error does signal, we mistakenly
evaluate it as a different process or as kernel context and panic (erp!).
This makes it pretty difficult to find the offending context.  But wait,
there is good news somewhere.

By forcing a SSYNC in the interrupt entry, we force all pending queues at
the system level to be processed and all hardware errors to be signaled.
Then we check the current interrupt state to see if the hardware error is
now signaled.  If so, we re-queue the current interrupt and return thus
allowing the higher priority hardware error interrupt to process properly.
Since we haven't done any other context processing yet, the right context
will be selected and killed.  There is still the possibility that the
exact offending instruction will be unknown, but at least we'll have a
much better idea of where to look.

The downside of course is that this causes system-wide syncs at every
interrupt point which results in significant performance degradation.
Since this situation should not occur in any properly configured system
(as hardware errors are triggered by things like bad pointers), make it a
debug configuration option and disable it by default.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:44 -04:00
Mike Frysinger
97b070c8e7 Blackfin: add note about anomaly 05000242 being worked around
Document anomaly 05000242 workaround in source code.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:42 -04:00
Graf Yang
5ba766752d Blackfin: work around anomaly 05000220
When possible, work around anomaly 05000220 (external memory is write
back cached, but L2 is not cached).  If not possible, detect the
conditions at build time and reject any qualifying configurations.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:41 -04:00
Mike Frysinger
a261eec000 Blackfin: rename some Blackfin drivers
Try to keep the naming conventions consistent, so:
	SPI_ADC_BF533 -> BFIN_SPI_ADC
	TWI_LCD       -> BFIN_TWI_LCD

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:41 -04:00
Robin Getz
a17c7f6f5b Blackfin: make sure MPU CPLB for first 1k is marked as valid
This way we properly catch and kill applications that jump to a NULL ptr.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:40 -04:00
Graf Yang
8af7ffa0d5 Blackfin: add workaround for anomaly 05000287
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:39 -04:00
Graf Yang
1fa9be72b5 Blackfin: add support for gptimer0 as a tick source
For systems where the core cycles are not a usable tick source (like SMP
or cycles gets updated), enable gptimer0 as an alternative.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:37 -04:00
Graf Yang
555487bbb6 Blackfin: annotate anomaly 05000120
Add some notes for anomaly 05000120 to make sure we work around it.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:36 -04:00
Graf Yang
ee0263cc2e Blackfin: BF518F-EZBRD: handle required portmuxing of async pins
The two high address lines on the BF51x are not dedicated which means we
need to handle them like any other peripheral pin if we want to access the
upper 2MB of parallel flash.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:35 -04:00
Sonic Zhang
7f3aee3c18 Blackfin: detect anomaly 05000274
Detect and reject operating conditions for anomaly 05000274 since the
problem cannot be worked around in software.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:35 -04:00
Mike Frysinger
d8804adf52 Blackfin: do not append newlines to panic() messages
The panic() function already handles newlines for us.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:34 -04:00
Mike Frysinger
729a3fa733 Blackfin: workaround anomaly 05000227
Workaround anomaly 05000227 by only using the scratch pad for stack when
absolutely necessary.  The core code which reprograms clocks really only
touches MMRs directly with constants.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:32 -04:00
Mike Frysinger
a9031028ef Blackfin: delete unused sys_getpagesize() function
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:31 -04:00
Graf Yang
e522c8466d Blackfin: work around anomaly 05000287
Make sure we work around anomaly 05000287 by configuring different port
preferences for the data cache.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:31 -04:00
Mike Frysinger
a9a59e3096 Blackfin: punt useless GPIO init call
This init code existed only to dump a printk(), and not even a useful one.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:30 -04:00
Robin Getz
76068c3c5d Blackfin: annotate anomaly 05000119 in core DMA code
Add a reminder note to avoid the DMA_DONE bit in our DMA core code.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:29 -04:00
Robin Getz
bc4d6f36db Blackfin: document anomaly 05000234 workaround
Note the reason for using CHIPD over DSPID.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:28 -04:00
Robin Getz
fecbd7366b Blackfin: fix early L1 relocation crash
Our early L1 relocate code may implicitly call code which lives in L1
memory.  This is due to the dma_memcpy() rewrite that made the DMA code
lockless and safe to be used by multiple processes.  If we start the
early DMA memcpy to relocate things into L1 instruction but then our
DMA memcpy code calls a function that lives in L1, things fall apart.
As such, create a small dedicated DMA memcpy routine that we can assume
sanity at boot time.

Reported-by: Filip Van Rillaer <filip.vanrillaer@oneaccess-net.com>
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:27 -04:00
Graf Yang
f5879fda09 Blackfin: add MDMA defines to make cross-variant coding easier
Add some defines to make the BF538/BF561 look like most other Blackfin
parts in that it has a MDMA0 channel available for low level init.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:26 -04:00
Mike Frysinger
f339f46b05 Blackfin: fix detection of cached L2 SRAM
Make sure our bfin_addr_dcachable() function flags cached L2 SRAM properly
else memory easily goes unflushed when working with DMA.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:25 -04:00
Mike Frysinger
c8f36dc3c1 Blackfin: simplify BF561 coreb driver greatly
Since 90% of this driver can be handled in user space, move it to the
corebld user space application.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:11:24 -04:00
Sonic Zhang
b9ccf14bc5 Blackfin: update defconfigs
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:11:23 -04:00
Mike Frysinger
78f28a0a83 Blackfin: simplify the do_flush macro
Simplify the do_flush macro now that we don't need to take into account
a second instruction being used together.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:48 -04:00
Mike Frysinger
f8b556514c Blackfin: set bf51x/bf52x to 0.0 rev by default and bf54x to 0.2
Update the default revs based on what we actually support (bf54x-0.[01]
is too broken to use).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:48 -04:00
Michael Hennerich
d4b890b0cd Blackfin: do not error if GPIO IRQ is requested already as GPIO
Some drivers expect to be able to request both as GPIO and GPIO IRQ, so
allow that use case.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:03:48 -04:00
Mike Frysinger
a413647bb5 Blackfin: pull updated anomaly lists from toolchain
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:47 -04:00
Michael Hennerich
648882d940 Blackfin: fix up PATA resource handling in bf537-stamp
Make sure the addresses declared match reality, and make the PATA IRQ code
optional.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:46 -04:00
Philippe Gerum
51387009bd Blackfin: merge Philippe's recent ipipe patch
ipipe-2.6.28.9-blackfin-git95aafe6.patch

Singed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 06:03:46 -04:00
Mike Frysinger
f75196c404 Blackfin: fix warnings with I/O port macros
The I/O port functions take ints, so we need to cast them up before
passing to our read/write funcs to avoid ugly messes of warnings.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:46 -04:00
Mariusz Kozlowski
f4290e81f6 Blackfin: fix parentheses balance and convert some tab/space mixing
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:45 -04:00
Graf Yang
4b402e3a54 Blackfin: fix bug found by traps test case 21
The traps test case 21 "exception 0x3f: l1_instruction_access" would make
the kernel panic on BF533's because we end up calling show_stack()
infinitely.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:45 -04:00
Mike Frysinger
5d89137a17 Blackfin: fix data cache flushing when doing icache flushing
Make sure we flush all data caches and their write buffers before flushing
icache, otherwise random edge cases could crop up where stale data is read
into icache from external memory.  As fallout, punt the combined icache +
dcache flush function since we cannot safely do them back to back -- the
SSYNC is needed between the dcache flush and the icache flush.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:45 -04:00
Graf Yang
f82e0a0c67 Blackfin: fix link failure due to CONFIG_EXCEPTION_L1_SCRATCH
Move exception stack mess from entry.S to init.c to fix link failure when
CONFIG_EXCEPTION_L1_SCRATCH is in use.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:44 -04:00
Robin Getz
b8d0c778e6 Blackfin: allow scheduler functions to be placed into L1
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:44 -04:00
Sonic Zhang
8d5c2f03bb Blackfin: Allow bf548 ATAPI to be routed to GPIO
By default, it is routed to async memory address. In GPIO case,
GPIO peripheral PINs should be requested in advance.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:43 -04:00
Yi Li
ffdf3ec806 Blackfin: bf527-ezkit: add support for mmc-spi
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:43 -04:00
Mike Frysinger
c8342f872d Blackfin: add some help text to the EBIU_AMBCTL settings
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:43 -04:00
Michael Hennerich
349ebbcc26 Blackfin: add comment for anomaly 05000171 to init code
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-06-12 06:03:42 -04:00
Arnd Bergmann
5b02ee3d21 asm-generic: merge branch 'master' of torvalds/linux-2.6
Fixes a merge conflict against the x86 tree caused by a fix to
atomic.h which I renamed to atomic_long.h.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-06-12 11:32:58 +02:00
Catalin Marinas
6ab56315a3 kmemleak: Remove the kmemleak.h include in drivers/char/vt.c
This file is no longer annotated for false positives but the kmemleak.h
include was still present.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Alan Cox <alan.cox@linux.intel.com>
2009-06-12 09:30:10 +01:00
Heiko Carstens
310d6b6715 [S390] wire up sys_perf_counter_open
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-12 10:27:40 +02:00
Heiko Carstens
fc39453deb [S390] wire up sys_rt_tgsigqueueinfo
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-12 10:27:39 +02:00
Heiko Carstens
9bf1226b33 [S390] ftrace: add system call tracer support
System call tracer support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-12 10:27:39 +02:00
Heiko Carstens
88dbd20372 [S390] ftrace: add function graph tracer support
Function graph tracer support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-12 10:27:39 +02:00
Heiko Carstens
8b4488f85d [S390] ftrace: add function trace mcount test support
Add support for early test if the function tracer is enabled or
disabled. Saves some extra function calls.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-12 10:27:38 +02:00