Commit Graph

369 Commits

Author SHA1 Message Date
Steven Miao 6594b982f6 Blackfin: smp: add smp_mb() to keep coherency
After use generic smp helpers, smp_mb() should be added to keep coherency.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-10-08 14:36:30 +08:00
Steven Miao 4087af4c7f Blackfin: drop irq enable in init_arch_irq()
Kernel common code will enable irq, drop it in init_arch_irq().

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-10-08 14:36:30 +08:00
Steven Miao 5204e4787b Blackfin: fix wrong place disabled irq
Shouldn't disable irq before send ipi.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-10-08 14:36:30 +08:00
James Cosin 810f1512dc Blackfin: cpufreq: fix dpm_state_table
This patch fixes an assumption that cclk's initial divisor will always be 1 (or
0 in the register).  TSCALE is always initialized on startup with a value of 4
regardless of the inital cclk divisor; so, we can't make the assumption without
making lots of other assumptions.  The TPERIOD value is set with a value of the
current cclk (value / (HZ * TSCALE)) - 1; so, we need to adjust based on this
initial frequency and not use cclk's initial divisor for adjusting the tscale.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-10-08 14:36:29 +08:00
Steven Miao 50888469bd blackfin: smp: adapt to generic smp helpers
Replace blackfin ipi message queue with generic smp helper function.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-09-07 17:54:56 +08:00
Bob Liu 719154c6d1 bf60x: fix build warning
Fix several build warning while using bf609-ezkit_defconfig.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:53 +08:00
Sonic Zhang 7c7d02772f bf60x: cpufreq: fix anomaly 05000273
Anomaly 05000273 doesn't apply to bf60x.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:53 +08:00
Sonic Zhang 06051fdefd bf60x: Add double fault, hardware error and NMI SEC handler
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:52 +08:00
Sonic Zhang e0a593104d bf60x: sec: Enable sec interrupt source priority configuration.
Customize the SEC interrupt priority array in machine ints-priority.c.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:52 +08:00
Sonic Zhang 11b27cb5b9 bf60x: sec: Clean up interrupt initialization code for SEC.
Turn SEC related macro CONFIG_BF60x into SEC_GCTL.
Move machine specific GPIO_PINT macros to machine gpio header.
Split SEC init_arch_irq() and vec_to_irq() from old SIC.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:51 +08:00
Steven Miao 3375a43f97 cleanup: sec and linkport only built on bf60x
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:51 +08:00
Steven Miao ba4691a4f4 bfin: pint: add pint suspend and resume
Add pint suspend and resume if defined BFIN_GPIO_PINT.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:51 +08:00
Steven Miao d49cdf8409 bf60x: pm: add pint suspend and resume support
save and restore pint sec CTL
save and restore pint registers
add pint suspend and resume when suspend to mem

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:51 +08:00
Bob Liu 357351bb4f blackfin: mach-common: ints-priority add irq_set_wake
Add irq_set_wake to bfin_sec_irqchip, drivers like stmmac need it.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:49 +08:00
Steven Miao 97929003c2 cpufreq: change debug message level to show clock change error
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:49 +08:00
Sonic Zhang c7e48e1e3e bfin: pm: add deepsleep for bf60x
Add add deepsleep for bf60x.
1. Call DMC init functions to enter and exit DDR self refresh mode.
2. Wait till CGU PLL is locked after wake up and exit DDR self refresh mode.
3. Make asessembly function enter_deepsleep comply with C funtion ABI in
order to call other C functions.
4. Switch kernel stack by register EX_SCRATCH_REG.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:49 +08:00
Steven Miao a5b4d4be6c irq: set cgu event handle to fasteoi handle
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:49 +08:00
Bob Liu f82f16d2f5 bfin: reorg clock init steps for bf609
So that user can set the clocks through menuconfig.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24 13:39:49 +08:00
Al Viro 6fd84c0831 TIF_RESTORE_SIGMASK can be set only when TIF_SIGPENDING is set
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01 12:58:50 -04:00
Linus Torvalds bf67f3a5c4 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull smp hotplug cleanups from Thomas Gleixner:
 "This series is merily a cleanup of code copied around in arch/* and
  not changing any of the real cpu hotplug horrors yet.  I wish I'd had
  something more substantial for 3.5, but I underestimated the lurking
  horror..."

Fix up trivial conflicts in arch/{arm,sparc,x86}/Kconfig and
arch/sparc/include/asm/thread_info_32.h

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
  um: Remove leftover declaration of alloc_task_struct_node()
  task_allocator: Use config switches instead of magic defines
  sparc: Use common threadinfo allocator
  score: Use common threadinfo allocator
  sh-use-common-threadinfo-allocator
  mn10300: Use common threadinfo allocator
  powerpc: Use common threadinfo allocator
  mips: Use common threadinfo allocator
  hexagon: Use common threadinfo allocator
  m32r: Use common threadinfo allocator
  frv: Use common threadinfo allocator
  cris: Use common threadinfo allocator
  x86: Use common threadinfo allocator
  c6x: Use common threadinfo allocator
  fork: Provide kmemcache based thread_info allocator
  tile: Use common threadinfo allocator
  fork: Provide weak arch_release_[task_struct|thread_info] functions
  fork: Move thread info gfp flags to header
  fork: Remove the weak insanity
  sh: Remove cpu_idle_wait()
  ...
2012-05-21 19:43:57 -07:00
Sonic Zhang 72b099ed93 blackfin: bf60x: pm: Add a debug option to calculate kernel wakeup time.
Display the total time when kernel resumes normal from standby or suspend to mem
mode.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:52 +08:00
Steven Miao 0fbd88ca20 blackfin: bf60x: add wakeup source select
Support select the wakeup source for power management on bf60x.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:50 +08:00
Bob Liu 7c141c1c5c blackfin: bf60x: make clock changeable in kernel menuconfig
Add clock changeable support in kernel menuconfig for bf60x.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:49 +08:00
Sonic Zhang 364130227d blackfin: remove redundant CONFIG_BF60x macro
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:44 +08:00
Mike Frysinger 080bb657eb Blackfin: delete fork func
We don't implement fork() since we are no-mmu, so redirect it to the
existing ENOSYS stub rather than adding a custom EINVAL one.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:39 +08:00
Bob Liu 494b794808 blackfin: mach-common: ints-priority: fix compile error
IRQ_PINT4/PINT5 are not defined on !CONFIG_BF60x, this patch fix it.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:33 +08:00
Bob Liu 3a3cf0d7b8 blackfin: bf60x: fix compiling warning
Fix several compiling warning for bf60x.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:26 +08:00
Steven Miao 93f89519fd blackfin: bf60x: add power management support
Add bf60x cpu pm callbacks and change blackfin pm framework to support bf60x.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:24 +08:00
Steven Miao 4f6b600fdc blackfin: mach-common: add sec support for bf60x
Add system event controller support for bf60x so that interrupt can be
handled.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:15 +08:00
Steven Miao 969003152a blackfin: bf60x: add clock support
Add clock support for bf60x.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:13 +08:00
Bob Liu b5affb0147 blackfin: add bf60x to current framework
This patch added bf60x to current blackfin kernel framework.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21 14:54:12 +08:00
Thomas Gleixner 6bba2682c6 blackfin: Use generic idle thread allocation
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Link: http://lkml.kernel.org/r/20120420124557.717064871@linutronix.de
2012-04-26 12:06:12 +02:00
Thomas Gleixner 8239c25f47 smp: Add task_struct argument to __cpu_up()
Preparatory patch to make the idle thread allocation for secondary
cpus generic.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Howells <dhowells@redhat.com>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20120420124556.964170564@linutronix.de
2012-04-26 12:06:09 +02:00
Geert Uytterhoeven ce6da7cd89 Blackfin: s/#if CONFIG/#ifdef CONFIG/
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-03-21 11:00:09 +08:00
Mike Frysinger dd47ba1378 Blackfin: wire up new process_vm syscalls
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-03-21 11:00:08 +08:00
Steven Miao a2eff9dd8b blackfin: smp: fix msg queue overflow issue
disable preemption when icache flush and use wait mode cross call, hold the msg
queue lock while handle cross function call to avoid overflow

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-01-09 10:26:15 +08:00
Bob Liu d0014be47d blackfin: smp: cleanup smp code
move idle task point to percpu blackfin_cpudata and add smp_timer_broadcast
interface.
enable SUPPLE_1_WAKEUP and add BFIN_IPI_TIMER ipi support.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-01-09 10:26:15 +08:00
Paul Gortmaker 6a550b99a0 blackfin: add module.h to files implicitly expecting to use it.
Its presence was implicit everywhere, but we are aiming to fix that,
so call out the users explicitly.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:31:02 -04:00
Steven Miao 0b2b06efd8 Blackfin: SMP: fix scheduling deadlock
Make sure our smp_send_reschedule() implementation matches the
scheduler_ipi() callback so that it can kick the idle cpu.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-10-25 19:51:29 -04:00
NeilBrown f5b9409973 All Arch: remove linkage for sys_nfsservctl system call
The nfsservctl system call is now gone, so we should remove all
linkage for it.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-26 15:09:58 -07:00
Arun Sharma 60063497a9 atomic: use <linux/atomic.h>
This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Mike Frysinger 9e770f7780 Blackfin: dpmc: optimize SDRAM programming slightly
No need to reload these registers constantly since they're always
available (we're not making any function calls in between).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:31 -04:00
Mike Frysinger da31d6fb46 Blackfin: dpmc: don't save/restore scratch registers
The Blackfin C ABI says we do not need to save/restore R0-R3 and P0-P2
as they are available as scratch registers.  So don't bother.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:31 -04:00
Mike Frysinger 9466a0510a Blackfin: bf538: pull gpio/port logic out of core hibernate paths
Re-architect how we save/restore the gpio/port logic that only pertains
to bf538/bf539 parts by pulling it out of the core code paths and pushing
it out to bf538-specific locations.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:30 -04:00
Mike Frysinger eed7b83658 Blackfin: dpmc: optimize hibernate/resume path
The current save logic used in hibernation is to do a MMR load (base +
offset) into a register, and then push that onto the stack.  Then when
restoring, pop off the stack into a register followed by a MMR store
(base + offset).  These use plenty of 32bit insns rather than 16bit,
are pretty long winded, and full of pipeline bubbles.

So, by taking advantage of MMRs that are contiguous, the multi-register
push/pop insn, and register abuse, we can shrink this code considerably.

When saving, the new logic does a lot of loads into the data and pointer
registers before executing a single multi-register push insn.  Then when
restoring, we do a single multi-register pop insn followed by a lot of
stores.  Overall, this allows us to cut the insn count by ~30%, the code
size by ~45%, and drastically reduce the register hazards that trigger
bubbles in the pipeline.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:29 -04:00
Mike Frysinger d7228e7eb9 Blackfin: dpmc: do not save/restore EVT0/EVT1/EVT4 when hibernating
EVT0 is for emulation, EVT1 is for reset, and EVT4 is the "global int
disable" region.  None of these are used by software (or even hardware),
so don't bother saving/restoring them when we hibernate since nothing
ever uses these in Linux (the only thing they would be useful for is
core-memory scratch, but that's just crazy talk).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:29 -04:00
Mike Frysinger 584ecbaa25 Blackfin: dpmc: relocate hibernate helper macros
This defines only get used in the hibernate code, so remove them from the
global dpmc header as no one else cares.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:28 -04:00
Mike Frysinger 429e257ea3 Blackfin: dpmc: omit RETE/RETN when hibernating
The RETE/RETN registers are only used in emulation(JTAG) and NMI nodes,
or as scratch registers, neither of which need to be saved/restored as
this code doesn't execute at those core event levels.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:28 -04:00
Mike Frysinger 4705a25c06 Blackfin: dpmc: optimize SIC_IWR programming a little
For parts with more than one SIC_IWR, we can optimize the writing
a little bit using better Blackfin insns.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:27 -04:00
Mike Frysinger 01f8e34c98 Blackfin: gpio/ints: generalize pint logic
Have the logic that uses peripheral interrupt blocks key off of pint
defines rather than CPU names so that things are generalized across
families.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-23 01:18:27 -04:00