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2008-05-07[Blackfin] arch: fix gdb testing regressionBernd Schmidt1-31/+77
When transferring to IRQ5 from an exception, save SYSCFG in memory across the transfer and clear the trace bit. When we get a single step exception, check whether we can safely clear the trace bit in SYSCFG. We can (and should) clear it after the first instruction of the interrupt handler; the first insn saves SYSCFG to the stack in all handlers. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: In the double fault handler, set up the PT_RETI slotBernd Schmidt1-0/+5
In the double fault handler, set up the PT_RETI slot so that we print out the correct return address in the dumping code. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: Support for CPU_FREQ and NOHZVitja Makarov1-9/+15
Singed-off-by: Vitja Makarov <vitja.makarov@gmail.com>
2008-05-07[Blackfin] arch: Functional power management support: Add CPU and platform ↵Michael Hennerich3-27/+142
voltage scaling support Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-07[Blackfin] arch: Cleanup Kconfig, fix comment and make sure we exclude ↵Michael Hennerich1-2/+2
CCLK=SCLK for some configurations Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: Functional power management support: Add support for cpu ↵Michael Hennerich2-1/+196
frequency scaling Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-25[Blackfin] arch: Remove the circular buffering mechanism for exceptionsBernd Schmidt2-90/+33
Remove the circular buffering mechanism for exceptions. Instead, point RETX at a safe location from which to fetch three NOPs. This safe location is now in the fixed code area, and also used for certain anomaly workarounds, to ensure that user space can find a valid ICPLB when things are built with CONFIG_MPU. Also, save I/DCPLB_FAULT_ADDRESS when lowering to level 5, since the hardware reg is valid only at exception level. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: Allow concurrent use of GPIO and GPIO IRQMichael Hennerich1-39/+13
The irq setup code no longer calls gpio request and free. This patch also changes the default gpio_free behavior on Blackfin. A freed GPIO keeps it's last state, and is not defaulted back to an input. This is also what all other architectures do. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: detect the memory available in the system on the fly by defaultMike Frysinger1-1/+2
detect the memory available in the system on the fly by default rather than forcing people to set this manually in the kconfig Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24[Blackfin] arch: make the mask explicit rather than writing a negative ↵Mike Frysinger1-1/+1
number in hex Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-23[Blackfin] arch: __FUNCTION__ is gcc-specific, use __func__Harvey Harrison1-1/+1
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-23[Blackfin] arch: fix bug - when using trace buffer with CONFIG_MPU enabled.Bernd Schmidt1-1/+6
There were a couple of problems with the way the trace buffer state is saved/restored in assembly. The DEBUG_HWTRACE_SAVE/RESTORE macros save a value to the stack, which is not immediately obvious; the CPLB exception code needed changes to load the correct value of the stack pointer. The other problem is that the SAVE/RESTORE macros weren't pushing and popping the value downwards on the stack, but rather moving it _upwards_, which is of course completely broken. We also need to make sure there's a matching DEBUG_HWTRACE_RESTORE in the error case of the CPLB handler. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-03-07[Blackfin] arch: to kill syscalls missing warning by adding new timerfd syscallsBryan Wu1-1/+4
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-25[Blackfin] arch: Fix CONFIG_PM support for BF561Michael Hennerich1-4/+2
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-25[Blackfin] arch: Remove DPMC char driver optionMichael Hennerich1-131/+0
Remove redundant/obsolete/dead code from DPMC driver Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-25[Blackfin] arch: Cleanup abd Simplify:Michael Hennerich1-106/+51
- Simplify init_arch_irq - Make code more readable - Remove useless SSYNCs - Fix comments Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-25[Blackfin] arch: fix bug - linux-2.6.24 (delayed) disable IRQ feature not ↵Michael Hennerich1-0/+3
functional for handle_simple_irq Bypass delayed disable feature by implementing chip->disable and chip->enable. http://lkml.org/lkml/2008/2/19/115 Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-25[Blackfin] arch: fix bug - Move IWR Enable All to the end of init_arch_irq ↵Michael Hennerich1-4/+10
otherwise it fails Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-02[Blackfin] arch:Fix BUG [#3876] pfbutton test for BTN3 on bf533 don't show ↵Michael Hennerich1-9/+13
complete info - Buttons on the BF533-STAMP board are not inverted - Fix spurious GPIO Interrupt caused during set irq_type for edge triggered interrupts Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-02-02[Blackfin] arch: change the trace buffer control start/stop logic in the ↵Mike Frysinger1-8/+4
exception handlers To save/restore the trace buffer control so that if we take an exception after turning off the trace buffer at a higher level we dont inadvertently turn the trace buffer back on Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-02-08[Blackfin] arch: hook up set_irq_wake in Blackfin's irq codeMichael Hennerich3-34/+168
- Add support for irq_wake on system and gpio interrupts - Remove outdated kernel options - Add option to select default PM mode - Fix various places where SIC_IWRx was only handled partially Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-02-08[Blackfin] arch: Merge BF561 support into ints-priorityMichael Hennerich3-520/+97
Merge single core ints-priority-sc.c and dual core ints-priority-dc.c into one common code ints-priority.c Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-02-05timerfd: new timerfd APIDavide Libenzi1-1/+1
This is the new timerfd API as it is implemented by the following patch: int timerfd_create(int clockid, int flags); int timerfd_settime(int ufd, int flags, const struct itimerspec *utmr, struct itimerspec *otmr); int timerfd_gettime(int ufd, struct itimerspec *otmr); The timerfd_create() API creates an un-programmed timerfd fd. The "clockid" parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME. The timerfd_settime() API give new settings by the timerfd fd, by optionally retrieving the previous expiration time (in case the "otmr" parameter is not NULL). The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit is set in the "flags" parameter. Otherwise it's a relative time. The timerfd_gettime() API returns the next expiration time of the timer, or {0, 0} if the timerfd has not been set yet. Like the previous timerfd API implementation, read(2) and poll(2) are supported (with the same interface). Here's a simple test program I used to exercise the new timerfd APIs: http://www.xmailserver.org/timerfd-test2.c [akpm@linux-foundation.org: coding-style cleanups] [akpm@linux-foundation.org: fix ia64 build] [akpm@linux-foundation.org: fix m68k build] [akpm@linux-foundation.org: fix mips build] [akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds] [heiko.carstens@de.ibm.com: fix s390] [akpm@linux-foundation.org: fix powerpc build] [akpm@linux-foundation.org: fix sparc64 more] Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-27[Blackfin] arch: Add the semtimedop syscall. Upstream uClibc doesn't ↵Bernd Schmidt1-0/+1
compile without it. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-27[Blackfin] arch: Initial checkin of the memory protection support.Bernd Schmidt1-0/+19
Enable it with CONFIG_MPU. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-11[Blackfin] arch: Add some comments - fix semicolonsMichael Hennerich1-17/+15
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-11[Blackfin] arch: move all code related to CPLB handling into a new ↵Bernd Schmidt4-986/+1
subdirectory under kernel/ Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-24[Blackfin] arch: Enable both edge triggered GPIO IRQs on BF54x and use ↵Michael Hennerich1-21/+46
irq_to_gpio() Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-24[Blackfin] arch: append IRQ Number to label stringMichael Hennerich2-8/+19
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-23[Blackfin] arch: Fix bug to Enable kernel to build for bf548 with PM.Sonic Zhang2-8/+54
On BF548-EZKIT, build kernel faills with power management, video and audio enabled. This patch fix this. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-21[Blackfin] arch: Let the pre-processor do the math to save a few cycles - no ↵Robin Getz1-3/+1
functional changes Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-21[Blackfin] arch: do not use fixed numbers to describe offsets - no ↵Robin Getz1-1/+1
functional changes Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-21[Blackfin] arch: do not use hard coded addressesRobin Getz1-4/+4
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-27[Blackfin] arch: fix bug - trap_tests fails to recover on some tests.Robin Getz3-63/+49
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3719 When the CPLBs get a miss, we do: - find a victim in the HW table - remove the victim - find the replacement in the software table - put it into the HW table. If we can't find a replacement in the software table, we accidently leave a duplicate in the HW table. This patch ensures that duplicate is marked as not valid. What we should do is find the replacement in the software table, before we find a victim in the HW table - but its too late in the release cycle to do that much restructuring of this code. Rather that duplicate code, connect Hardware Errors (irq5) into trap_c, so user space processes get killed properly. The rest of irq_panic() can be moved into traps.c (later) There is still a small corner case that causes problems when a pheriperal interrupt goes off a single cycle before a user space hardware error. This causes a kernel panic, rather than the user space process being killed. But, this checkin makes things work in 99.9% of the cases, and is a vast improvement from what is there today (which fails 100% of the time). Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-27[Blackfin] arch: Add a note describing what is going on - no functional changesRobin Getz1-2/+13
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21Blackfin arch: split apart dump_bfin_regs and merge/remove show_regs from ↵Mike Frysinger1-1/+3
process.c, which was largely duplicated Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21Blackfin arch: use common __INIT/__FINIT defines rather than setting the ↵Mike Frysinger1-2/+3
.section ourselves to .init.text Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21Blackfin arch: Ensure we printk out strings with the proper loglevelRobin Getz1-5/+5
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21Blackfin arch: Need to specify ax with the .init.text section,Bernd Schmidt1-1/+1
Need to specify "ax" with the .init.text section, otherwise the linker will make unique .init.text.1 .. .init.text.3 sections to cope with the flags
2007-11-21Blackfin arch: Fix typo, and add ENDPROC - no functional changesMike Frysinger1-1/+2
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21Blackfin arch: rename _return_from_exception to _bfin_return_from_exception ↵Mike Frysinger1-4/+4
and export it Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-17Blackfin arch: fix spurious newline in headerMike Frysinger1-1/+1
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-15Blackfin arch: do not include linux/autoconf.hMike Frysinger1-1/+0
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-15Blackfin arch: remove useless CONFIG_IRQCHIP_DEMUX_GPIOMike Frysinger2-31/+18
since we have this always turned on now and dont want it off (and hasnt been an option in a while) Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-15Blackfin arch: fix bug cplbmgr.S does not exit properly on error conditionRobin Getz1-7/+18
https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=1685 Ensure that cache/protection is turned back on when we get a fault, and ensure that the initial population of the CPLB tables are correct - that kernel is locked in CPLB tables Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-12Blackfin arch: ensure we work around ANOMALY_05000261 for null pointersRobin Getz1-9/+29
We currently do not. Also make it easier to handle cplb violations - in traps.c Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-10-29Blackfin arch: ensure that speculative loads of bad pointers don't cause us ↵Robin Getz1-1/+1
to do bad things. Fix/change formatting of a few more things. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-10-21Blackfin arch: Optimization - no need to make additional math hereMichael Hennerich1-3/+3
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-10-21Blackfin arch: force irq_flags into the .data sectionMike Frysinger2-2/+14
force irq_flags into the .data section by initializing it to the hardware masks that cannot be disabled. this way if we use irq enable/disable functions before the .bss has been zeroed out (as does our l1 relocate/dma functions), we dont hit a problem where bss contains bogus crap. Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-10-21Blackfin arch: add new processor ADSP-BF52x arch/mach supportMichael Hennerich1-10/+31
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
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