linux-toradex.git/include/asm-powerpc/io.h, branch v2.6.19.2

[POWERPC] Make mmiowb's io_sync preempt safe

2006-11-01T03:52:49+00:00

If mmiowb() is always used prior to releasing spinlock as Doc suggests,
then it's safe against preemption; but I'm not convinced that's always
the case.  If preemption occurs between sync and get_paca()->io_sync = 0,
I believe there's no problem.  But in the unlikely event that gcc does
the store relative to another register than r13 (as it did with current),
then there's a small danger of setting another cpu's io_sync to 0, after
it had just set it to 1.  Rewrite ppc64 mmiowb to prevent that.

The remaining io_sync assignments in io.h all get_paca()->io_sync = 1,
which is harmless even if preempted to the wrong cpu (the context switch
itself syncs); and those in spinlock.h are while preemption is disabled.

Signed-off-by: Hugh Dickins 
Signed-off-by: Paul Mackerras

[PATCH] Consolidate check_signature

2006-10-11T18:14:23+00:00

There's nothing arch-specific about check_signature(), so move it to
.  Use a cross between the Alpha and i386 implementations as
the generic one.

Signed-off-by: Matthew Wilcox 
Acked-by: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] restore parport_pc probing on powermac

2006-10-03T15:03:41+00:00

The last change for partport_pc did fix the common case for all PowerMacs,
but it broke the case for PCI multiport IO cards.  In fact, the config
option CONFIG_PARPORT_PC_SUPERIO=y lead to a hard crash when cups probed
the parport driver.  It enables the winbond and smsc probing.

Remove the PARPORT_BASE check again, parport_pc_find_nonpci_ports() will
take care of it.  All powerpc configs should have
CONFIG_PARPORT_PC_SUPERIO=n, the code did not find anything on the chrp
boards we tested it on.

Tested on a G4/466 with a PCI card:

0001:10:13.0 Serial controller: Timedia Technology Co Ltd PCI2S550 (Dual 16550 UART) (rev 01) (prog-if 02 [16550])
        Subsystem: Timedia Technology Co Ltd Unknown device 5079
        Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
        Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Adam Belay 
Cc: Dmitry Torokhov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] update legacy io handling for pmac

2006-10-01T07:39:23+00:00

ppc can boot one single binary on prep, chrp and pmac boards.  ppc64 can
boot one single binary on pseries and G5 boards.  pmac has no legacy io,
probing for PC style legacy hardware (or accessing the legacy io area
regulary) may lead to a hard crash:

* add check for parport_pc, exit on pmac.  32bit chrp has no
  ->check_legacy_ioport, the probe is always called.  64bit chrp has
  check_legacy_ioport, check for a "parallel" node

* add check for isapnp, only PReP boards may have real ISA slots.  32bit
  PReP will have no ->check_legacy_ioport, the probe is always called.

* update code in i8042_platform_init.  Run ->check_legacy_ioport first,
  always call request_region.  No functional change.  Remove whitespace
  before i8042_reset init.

Signed-off-by: Olaf Hering 
Acked-by: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Adam Belay 
Cc: Dmitry Torokhov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[POWERPC] Merge iSeries i/o operations with the rest

2006-09-22T05:19:58+00:00

This patch changes the io operations so that they are out of line if
CONFIG_PPC_ISERIES is set and includes a firmware feature check in
that case.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

[POWERPC] iseries: eliminate a couple of warnings

2006-09-20T04:12:22+00:00

Copy and paste bug in io.h

Signed-off-by: Stephen Rothwell

[POWERPC] convert string i/o operations to C

2006-09-20T04:06:18+00:00

This produces essentially the same code and will make the iSeries i/o
consolidation easier.

The count parameter is changed to long since that will produce the same
(better) code on 32 and 64 bit builds.

Signed-off-by: Stephen Rothwell

[POWERPC] clean up ide io accessors

2006-09-20T04:06:18+00:00

Signed-off-by: Stephen Rothwell

[POWERPC] remove unused asm routines

2006-09-20T04:06:18+00:00

_insw, _outsw, _insl amd _outsl are all unused, so remove them.

Signed-off-by: Stephen Rothwell

[POWERPC] remove unused io accessors

2006-09-20T04:06:17+00:00

The io accessors insw_ns, outsw_ns, insl_ns and outsl_ns are unused
(except for one unnecessary use in drivers/net/3c509.c that is addressed
in a previous patch) and are only defined in powerpc/ppc, so remove them.

Signed-off-by: Stephen Rothwell