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  1. 07 2月, 2007 2 次提交
  3. 08 12月, 2006 2 次提交
    • K
      [POWERPC] Fix 440SPe CPU table entry · a147c585
      由 Kumar Gala 提交于 
      The 440SPe CPU table entry was missing the CPU_FTR_NODSISRALIGN and
really should have been CPU_FTRS_44X.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
      a147c585
    • K
      [POWERPC] Add support for FP emulation for the e300c2 core · aa42c69c
      由 Kim Phillips 提交于 
      The e300c2 has no FPU.  Its MSR[FP] is grounded to zero.  If an attempt
is made to execute a floating point instruction (including floating-point
load, store, or move instructions), the e300c2 takes a floating-point
unavailable interrupt.

This patch adds support for FP emulation on the e300c2 by declaring a
new CPU_FTR_FP_TAKES_FPUNAVAIL, where FP unavail interrupts are
intercepted and redirected to the ProgramCheck exception path for
correct emulation handling.

(If we run out of CPU_FTR bits we could look to reclaim this bit by adding
support to test the cpu_user_features for PPC_FEATURE_HAS_FPU instead)

It adds a nop to the exception path for 32-bit processors with a FPU.
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
      aa42c69c
  5. 04 12月, 2006 4 次提交
    • S
      [POWERPC] Add the e300c3 core to the CPU table. · 57933f8f
      由 Scott Wood 提交于 
      This core is used in Freescale's 831x chips.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      57933f8f
    • M
      [POWERPC] powerpc: Make 970MP detectable by oprofile · fecb352f
      由 Mike Wolf 提交于 
      Change the oprofile_cpu_type in cputables.c to be ppc64/970MP.  Oprofile
needs to distinquish the MP from other 970 processors so it can add some
new counters specific to the 970MP.
Signed-off-by: NMike Wolf <mjw@us.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      fecb352f
    • P
      [POWERPC] Distinguish POWER6 partition modes and tell userspace · 974a76f5
      由 Paul Mackerras 提交于 
      This adds code to look at the properties firmware puts in the device
tree to determine what compatibility mode the partition is in on
POWER6 machines, and set the ELF aux vector AT_HWCAP and AT_PLATFORM
entries appropriately.

Specifically, we look at the cpu-version property in the cpu node(s).
If that contains a "logical" PVR value (of the form 0x0f00000x), we
call identify_cpu again with this PVR value.  A value of 0x0f000001
indicates the partition is in POWER5+ compatibility mode, and a value
of 0x0f000002 indicates "POWER6 architected" mode, with various
extensions disabled.  We also look for various other properties:
ibm,dfp, ibm,purr and ibm,spurr.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      974a76f5
    • M
      [POWERPC] cell: Add oprofile support · 18f2190d
      由 Maynard Johnson 提交于 
      Add PPU event-based and cycle-based profiling support to Oprofile for Cell.

Oprofile is expected to collect data on all CPUs simultaneously.
However, there is one set of performance counters per node.  There are
two hardware threads or virtual CPUs on each node.  Hence, OProfile must
multiplex in time the performance counter collection on the two virtual
CPUs.

The multiplexing of the performance counters is done by a virtual
counter routine.  Initially, the counters are configured to collect data
on the even CPUs in the system, one CPU per node.  In order to capture
the PC for the virtual CPU when the performance counter interrupt occurs
(the specified number of events between samples has occurred), the even
processors are configured to handle the performance counter interrupts
for their node.  The virtual counter routine is called via a kernel
timer after the virtual sample time.  The routine stops the counters,
saves the current counts, loads the last counts for the other virtual
CPU on the node, sets interrupts to be handled by the other virtual CPU
and restarts the counters, the virtual timer routine is scheduled to run
again.  The virtual sample time is kept relatively small to make sure
sampling occurs on both CPUs on the node with a relatively small
granularity.  Whenever the counters overflow, the performance counter
interrupt is called to collect the PC for the CPU where data is being
collected.

The oprofile driver relies on a firmware RTAS call to setup the debug bus
to route the desired signals to the performance counter hardware to be
counted.  The RTAS call must set the routing registers appropriately in
each of the islands to pass the signals down the debug bus as well as
routing the signals from a particular island onto the bus.  There is a
second firmware RTAS call to reset the debug bus to the non pass thru
state when the counters are not in use.
Signed-off-by: NCarl Love <carll@us.ibm.com>
Signed-off-by: NMaynard Johnson <mpjohn@us.ibm.com>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      18f2190d
  7. 25 10月, 2006 2 次提交
    • B
      [POWERPC] Support feature fixups in vdso's · 0909c8c2
      由 Benjamin Herrenschmidt 提交于 
      This patch reworks the feature fixup mecanism so vdso's can be fixed up.
The main issue was that the construct:

        .long   label  (or .llong on 64 bits)

will not work in the case of a shared library like the vdso. It will
generate an empty placeholder in the fixup table along with a reloc,
which is not something we can deal with in the vdso.

The idea here (thanks Alan Modra !) is to instead use something like:

1:
        .long   label - 1b

That is, the feature fixup tables no longer contain addresses of bits of
code to patch, but offsets of such code from the fixup table entry
itself. That is properly resolved by ld when building the .so's. I've
modified the fixup mecanism generically to use that method for the rest
of the kernel as well.

Another trick is that the 32 bits vDSO included in the 64 bits kernel
need to have a table in the 64 bits format. However, gas does not
support 32 bits code with a statement of the form:

        .llong  label - 1b  (Or even just .llong label)

That is, it cannot emit the right fixup/relocation for the linker to use
to assign a 32 bits address to an .llong field. Thus, in the specific
case of the 32 bits vdso built as part of the 64 bits kernel, we are
using a modified macro that generates:

        .long   0xffffffff
        .llong  label - 1b

Note that is assumes that the value is negative which is enforced by
the .lds (those offsets are always negative as the .text is always
before the fixup table and gas doesn't support emiting the reloc the
other way around).
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      0909c8c2
    • B
      [POWERPC] Consolidate feature fixup code · 42c4aaad
      由 Benjamin Herrenschmidt 提交于 
      There are currently two versions of the functions for applying the
feature fixups, one for CPU features and one for firmware features. In
addition, they are both in assembly and with separate implementations
for 32 and 64 bits. identify_cpu() is also implemented in assembly and
separately for 32 and 64 bits.

This patch replaces them with a pair of C functions. The call sites are
slightly moved on ppc64 as well to be called from C instead of from
assembly, though it's a very small change, and thus shouldn't cause any
problem.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      42c4aaad
  9. 23 10月, 2006 1 次提交
  11. 16 10月, 2006 2 次提交
  13. 04 10月, 2006 1 次提交
  15. 21 9月, 2006 1 次提交
  17. 13 9月, 2006 1 次提交
  19. 25 8月, 2006 1 次提交
    • O
      [POWERPC] Cleanup CPU inits · f39b7a55
      由 Olof Johansson 提交于 
      Cleanup CPU inits a bit more, Geoff Levand already did some earlier.

* Move CPU state save to cpu_setup, since cpu_setup is only ever done
  on cpu 0 on 64-bit and save is never done more than once.
* Rename __restore_cpu_setup to __restore_cpu_ppc970 and add
  function pointers to the cputable to use instead. Powermac always
  has 970 so no need to check there.
* Rename __970_cpu_preinit to __cpu_preinit_ppc970 and check PVR before
  calling it instead of in it, it's too early to use cputable.
* Rename pSeries_secondary_smp_init to generic_secondary_smp_init since
  everyone but powermac and iSeries use it.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f39b7a55
  21. 01 7月, 2006 1 次提交
  23. 28 6月, 2006 1 次提交
    • K
      powerpc: minor cleanups for mpc86xx · 9ad494f6
      由 Kumar Gala 提交于 
      * Remove duplicated cputable entry for 8641 (matches w/7448)
* Removed __init from function prototypes in mpc86xx.h
* Moved pci fixups into board specific code
* Moved mpc86xx_exclude_device to generic mpc86xx pci code
* Fixed sparse warnings in mpc86xx_smp.c
* Removed board specific header include from asm-powerpc/mpc86xx.h
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
      9ad494f6
  25. 21 6月, 2006 1 次提交
  27. 15 6月, 2006 1 次提交
  29. 09 6月, 2006 3 次提交
  31. 19 5月, 2006 1 次提交
  33. 29 4月, 2006 1 次提交
  35. 03 3月, 2006 1 次提交
  37. 07 2月, 2006 1 次提交
  39. 14 1月, 2006 2 次提交
    • A
      [PATCH] powerpc: oprofile cpu type names clash with other code · 7a45fb19
      由 Andy Whitcroft 提交于 
      In 2.6.15-git6 a change was commited in the oprofile support in
the powerpc architecture.  It introduced the powerpc_oprofile_type
which contains the define G4.  This causes a name clash with the
existing wacom usb tablet driver.

      CC [M]  drivers/usb/input/wacom.o
    drivers/usb/input/wacom.c:98: error: conflicting types for `G4'
    include/asm/cputable.h:37: error: previous declaration of `G4'
      CC [M]  drivers/usb/mon/mon_text.o
    make[3]: *** [drivers/usb/input/wacom.o] Error 1
    make[2]: *** [drivers/usb/input] Error 2

The elements of an enum declared in global scope are effectivly
global identifiers themselves.  As such we need to ensure the names
are unique.  This patch updates the later oprofile support to use
unique names.
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      7a45fb19
    • P
      powerpc: Provide a suitable AT_PLATFORM value · 80f15dc7
      由 Paul Mackerras 提交于 
      The glibc folks want to use AT_PLATFORM to select between possible
alternative versions of shared libraries.  This commit makes the kernel
supply an AT_PLATFORM string that indicates what class of processor
we are running on.  Processors with the same set of user-level
instructions and roughly the same instruction scheduling characteristics
are given the same AT_PLATFORM value; for example, 821, 823 and 860
are all reported as "ppc823", and 7447, 7447A, 7448, 7450, 7451, 7455
are all called "ppc7450".

The intention is that the AT_PLATFORM values match the values that
gcc accepts for the -mcpu= option.  For values which are numeric
(e.g. -mcpu=750), "ppc" has been prepended.

This also adds a PPC_FEATURE_BOOKE bit to the AT_HWCAP value and sets
it for the 440 family and the Freescale 85xx family.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      80f15dc7
  41. 09 1月, 2006 4 次提交
  43. 10 11月, 2005 1 次提交
  45. 07 11月, 2005 2 次提交
  47. 29 10月, 2005 1 次提交
  49. 13 10月, 2005 1 次提交
  51. 12 10月, 2005 1 次提交
    • B
      [PATCH] ppc32: Tell userland about lack of standard TB · d8e998c5
      由 Benjamin Herrenschmidt 提交于 
      Glibc is about to get some new high precision timer stuff that relies on
the standard timebase of the PPC architecture.

However, some (rare & old) CPUs do not have such timebase and it is a
bit annoying to have your stuff just crash because you are running on
the wrong CPU...

This exposes to userland a CPU feature bit that tells that the current
processor doesn't have a standard timebase.  It's negative logic so that
glibc will still "just work" on older kernels (it will just be unhappy
on those old CPUs but that doesn't really matter as distro tend to
update glibc & kernel at the same time).
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      d8e998c5