1. 12 Feb, 2007 1 commit
  2. 11 Feb, 2007 1 commit
    • Christoph Lameter's avatar
      [PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA · 5ac6da66
      Christoph Lameter authored
      
      As Andi pointed out: CONFIG_GENERIC_ISA_DMA only disables the ISA DMA
      channel management.  Other functionality may still expect GFP_DMA to
      provide memory below 16M.  So we need to make sure that CONFIG_ZONE_DMA is
      set independent of CONFIG_GENERIC_ISA_DMA.  Undo the modifications to
      mm/Kconfig where we made ZONE_DMA dependent on GENERIC_ISA_DMA and set
      theses explicitly in each arches Kconfig.
      
      Reviews must occur for each arch in order to determine if ZONE_DMA can be
      switched off.  It can only be switched off if we know that all devices
      supported by a platform are capable of performing DMA transfers to all of
      memory (Some arches already support this: uml, avr32, sh sh64, parisc and
      IA64/Altix).
      
      In order to switch ZONE_DMA off conditionally, one would have to establish
      a scheme by which one can assure that no drivers are enabled that are only
      capable of doing I/O to a part of memory, or one needs to provide an
      alternate means of performing an allocation from a specific range of memory
      (like provided by alloc_pages_range()) and insure that all drivers use that
      call.  In that case the arches alloc_dma_coherent() may need to be modified
      to call alloc_pages_range() instead of relying on GFP_DMA.
      Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5ac6da66
  3. 07 Feb, 2007 3 commits
  4. 06 Feb, 2007 5 commits
  5. 27 Jan, 2007 1 commit
  6. 26 Jan, 2007 2 commits
    • David Woodhouse's avatar
      Fix Maple PATA IRQ assignment. · 8cdf92a9
      David Woodhouse authored
      
      On the Maple board, the AMD8111 IDE is in legacy mode... except that it
      appears on IRQ 20 instead of IRQ 15. For drivers/ide this was handled by
      the architecture's "pci_get_legacy_ide_irq()" function, but in libata we
      just hard-code the numbers 14 and 15.
      
      This patch provides asm-powerpc/libata-portmap.h which maps the IRQ as
      appropriate, having added a pci_dev argument to the
      ATA_{PRIM,SECOND}ARY_IRQ macros.
      
      There's probably a better way to do this -- especially if we observe
      that the _only_ case in which this seemingly-generic
      "pci_get_legacy_ide_irq()" function returns anything other than 14 and
      15 for primary and secondary respectively is the case of the AMD8111 on
      the Maple board -- couldn't we handle that with a special case in the
      pata_amd driver, or perhaps with a PCI quirk for Maple to switch it into
      native mode during early boot and assign resources properly?
      Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      8cdf92a9
    • Kumar Gala's avatar
      [POWERPC] 83xx: Fix Kconfig to only enable FP math emulation for the MPC832x · 4d52719a
      Kumar Gala authored
      
      Updated MATH_EMULATION depends to be on PPC_MPC832x instead of PPC_83xx.  Only
      the the MPC832x has no floating point unit in the core.  Updated the other
      83xx defconfigs that got math emulation turned on incorrectly.
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      4d52719a
  7. 09 Jan, 2007 1 commit
  8. 11 Dec, 2006 1 commit
    • Jeremy Fitzhardinge's avatar
      [POWERPC] Generic BUG for powerpc · 73c9ceab
      Jeremy Fitzhardinge authored
      
      This makes powerpc use the generic BUG machinery.  The biggest reports the
      function name, since it is redundant with kallsyms, and not needed in general.
      
      There is an overall reduction of code, since module_32/64 duplicated several
      functions.
      
      Unfortunately there's no way to tell gcc that BUG won't return, so the BUG
      macro includes a goto loop.  This will generate a real jmp instruction, which
      is never used.
      
      [akpm@osdl.org: build fix]
      [paulus@samba.org: remove infinite loop in BUG_ON]
      Signed-off-by: default avatarJeremy Fitzhardinge <jeremy@goop.org>
      Cc: Andi Kleen <ak@muc.de>
      Cc: Hugh Dickens <hugh@veritas.com>
      Cc: Michael Ellerman <michael@ellerman.id.au>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      73c9ceab
  9. 08 Dec, 2006 4 commits
    • David Howells's avatar
      [PATCH] LOG2: Provide ilog2() fallbacks for powerpc · ef55d53c
      David Howells authored
      
      Provide ilog2() fallbacks for powerpc for 32-bit numbers and 64-bit numbers on
      ppc64.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      ef55d53c
    • David Howells's avatar
      [PATCH] LOG2: Implement a general integer log2 facility in the kernel · f0d1b0b3
      David Howells authored
      
      This facility provides three entry points:
      
      	ilog2()		Log base 2 of unsigned long
      	ilog2_u32()	Log base 2 of u32
      	ilog2_u64()	Log base 2 of u64
      
      These facilities can either be used inside functions on dynamic data:
      
      	int do_something(long q)
      	{
      		...;
      		y = ilog2(x)
      		...;
      	}
      
      Or can be used to statically initialise global variables with constant values:
      
      	unsigned n = ilog2(27);
      
      When performing static initialisation, the compiler will report "error:
      initializer element is not constant" if asked to take a log of zero or of
      something not reducible to a constant.  They treat negative numbers as
      unsigned.
      
      When not dealing with a constant, they fall back to using fls() which permits
      them to use arch-specific log calculation instructions - such as BSR on
      x86/x86_64 or SCAN on FRV - if available.
      
      [akpm@osdl.org: MMC fix]
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Wojtek Kaniewski <wojtekka@toxygen.net>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      f0d1b0b3
    • Kim Phillips's avatar
      [POWERPC] Add support for FP emulation for the e300c2 core · aa42c69c
      Kim Phillips authored
      
      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: default avatarKim Phillips <kim.phillips@freescale.com>
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      aa42c69c
    • Nathan Lynch's avatar
      [POWERPC] maple: Select PPC_RTAS · 9d9d868e
      Nathan Lynch authored
      
      Some systems supported by the maple platform have RTAS; make PPC_MAPLE
      select PPC_RTAS.
      Signed-off-by: default avatarNathan Lynch <ntl@pobox.com>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      9d9d868e
  10. 04 Dec, 2006 12 commits
  11. 29 Nov, 2006 1 commit
  12. 12 Nov, 2006 1 commit
  13. 10 Nov, 2006 1 commit
  14. 21 Oct, 2006 1 commit
  15. 16 Oct, 2006 1 commit
  16. 04 Oct, 2006 1 commit
    • Li Yang's avatar
      [POWERPC] Add QUICC Engine (QE) infrastructure · 98658538
      Li Yang authored
      
      Add QUICC Engine (QE) configuration, header files, and
      QE management and library code that are used by QE devices
      drivers.
      
      Includes Leo's modifications up to, and including, the
      platform_device to of_device adaptation:
      
      "The series of patches add generic QE infrastructure called
      qe_lib, and MPC8360EMDS board support.  Qe_lib is used by
      QE device drivers such as ucc_geth driver.
      
      This version updates QE interrupt controller to use new irq
      mapping mechanism, addresses all the comments received with
      last submission and includes some style fixes.
      
      v2: Change to use device tree for BCSR and MURAM;
      Remove I/O port interrupt handling code as it is not generic
      enough.
      
      v3: Address comments from Kumar;  Update definition of several
      device tree nodes;  Copyright style change."
      
      In addition, the following changes have been made:
      
      o removed typedefs
      o uint -> u32 conversions
      o removed following defines:
        QE_SIZEOF_BD, BD_BUFFER_ARG, BD_BUFFER_CLEAR, BD_BUFFER,
        BD_STATUS_AND_LENGTH_SET, BD_STATUS_AND_LENGTH, and BD_BUFFER_SET
        because they hid sizeof/in_be32/out_be32 operations from the reader.
      o fixed qe_snums_init() serial num assignment to use a const array
      o made CONFIG_UCC_FAST select UCC_SLOW
      o reduced NR_QE_IC_INTS from 128 to 64
      o remove _IO_BASE, etc. defines (not used)
      o removed irrelevant comments, added others to resemble removed BD_ defines
      o realigned struct definitions in headers
      o various other style fixes including things like pinMask -> pin_mask
      o fixed a ton of whitespace issues
      o marked ioregs as __be32/__be16
      o removed platform_device code and redundant get_qe_base()
      o removed redundant comments
      o added cpu_relax() to qe_reset
      o uncasted all get_property() assignments
      o eliminated unneeded casts
      o eliminated immrbar_phys_to_virt (not used)
      Signed-off-by: default avatarLi Yang <leoli@freescale.com>
      Signed-off-by: default avatarShlomi Gridish <gridish@freescale.com>
      Signed-off-by: default avatarKim Phillips <kim.phillips@freescale.com>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      98658538
  17. 03 Oct, 2006 3 commits