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  1. 04 12月, 2006 3 次提交
  3. 13 11月, 2006 3 次提交
  5. 01 11月, 2006 2 次提交
  7. 25 10月, 2006 3 次提交
    • B
      [POWERPC] Fix CHRP platforms with only 8259 · f4d4c354
      由 Benjamin Herrenschmidt 提交于 
      On CHRP platforms with only a 8259 controller, we should set the
default IRQ host to the 8259 driver's one for the IRQ probing
fallbacks to work in case the IRQ tree is incorrect (like on
Pegasos for example). Without this fix, we get a bunch of WARN_ON's
during boot.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f4d4c354
    • S
      [POWERPC] IPIC: Fix spinlock recursion in set_irq_handler · f49196a5
      由 Scott Wood 提交于 
      This causes ipic_set_irq_type to set the handler directly rather
than call set_irq_handler, which causes spinlock recursion because
the lock is already held when ipic_set_irq_type is called.

I'm also not convinced that ipic_set_irq_type should be changing the
handler at all.  There seem to be several controllers that don't and
several that do.  Those that do would break what appears to be a common
usage of calling set_irq_chip_and_handler followed by set_irq_type, if a
non-standard handler were to be used.  OTOH, irq_create_of_mapping()
doesn't set the handler, but only calls set_irq_type().

This patch gets things working in the spinlock-debugging-enabled case,
but I'm curious as to where the handler setting is ideally supposed to be
done.  I don't see any documentation on set_irq_type() that clarifies
what the semantics are supposed to be.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f49196a5
    • L
      [POWERPC] Fix the UCC rx/tx clock of QE · f84c39da
      由 Liu Dave-r63238 提交于 
      MPC8323EMDS board ethernet interface with RMII uses the CLK16 divisor
for the rx and tx clock, but the ucc_set_qe_mux_rxtx() function doesn't
handle the CLK16 setting of the CMXUCR3 and CMXUCR4 registers.  This
fixes it.
Signed-off-by: NDave Liu <daveliu@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f84c39da
  9. 23 10月, 2006 2 次提交
  11. 16 10月, 2006 1 次提交
  13. 10 10月, 2006 1 次提交
  15. 07 10月, 2006 2 次提交
    • O
      [POWERPC] Fix up after irq changes · 35a84c2f
      由 Olaf Hering 提交于 
      Remove struct pt_regs * from all handlers.
Also remove the regs argument from get_irq() functions.
Compile tested with arch/powerpc/config/* and
arch/ppc/configs/prep_defconfig
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      35a84c2f
    • O
      [POWERPC] Fix fsl_soc build breaks · 2b00b254
      由 Olof Johansson 提交于 
      Hrm, there's no way this ever built at time of merge. There's a missing } and
the wrong type on phy_irq.

Also, another const for get_property().

  CC      arch/powerpc/sysdev/fsl_soc.o
arch/powerpc/sysdev/fsl_soc.c: In function 'fs_enet_of_init':
arch/powerpc/sysdev/fsl_soc.c:625: error: assignment of read-only variable 'phy_irq'
arch/powerpc/sysdev/fsl_soc.c:625: warning: assignment makes integer from pointer without a cast
arch/powerpc/sysdev/fsl_soc.c:661: warning: assignment discards qualifiers from pointer target type
arch/powerpc/sysdev/fsl_soc.c:684: error: subscripted value is neither array nor pointer
arch/powerpc/sysdev/fsl_soc.c:687: error: subscripted value is neither array nor pointer
arch/powerpc/sysdev/fsl_soc.c:722: warning: ISO C90 forbids mixed declarations and code
arch/powerpc/sysdev/fsl_soc.c:728: error: invalid storage class for function 'cpm_uart_of_init'
arch/powerpc/sysdev/fsl_soc.c:798: error: initializer element is not constant
arch/powerpc/sysdev/fsl_soc.c:798: error: expected declaration or statement at end of input
make[1]: *** [arch/powerpc/sysdev/fsl_soc.o] Error 1
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      2b00b254
  17. 06 10月, 2006 1 次提交
  19. 05 10月, 2006 1 次提交
    • D
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      由 David Howells 提交于 
      Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
      7d12e780
  21. 04 10月, 2006 5 次提交
  23. 27 9月, 2006 1 次提交
  25. 22 9月, 2006 6 次提交
  27. 21 9月, 2006 1 次提交
  29. 13 9月, 2006 1 次提交
  31. 30 8月, 2006 3 次提交
  33. 23 8月, 2006 2 次提交
  35. 18 8月, 2006 1 次提交
  37. 08 8月, 2006 1 次提交