1. 14 6月, 2007 3 次提交
    • D
      [POWERPC] Kill typedef-ed structs for hash PTEs and BATs · 8e561e7e
      David Gibson 提交于
      Using typedefs to rename structure types if frowned on by CodingStyle.
      However, we do so for the hash PTE structure on both ppc32 (where it's
      called "PTE") and ppc64 (where it's called "hpte_t").  On ppc32 we
      also have such a typedef for the BATs ("BAT").
      
      This removes this unhelpful use of typedefs, in the process
      bringing ppc32 and ppc64 closer together, by using the name "struct
      hash_pte" in both cases.
      Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      8e561e7e
    • D
      [POWERPC] Remove the dregs of APUS support from arch/powerpc · f21f49ea
      David Gibson 提交于
      APUS (the Amiga Power-Up System) is not supported under arch/powerpc
      and it's unlikely it ever will be.  Therefore, this patch removes the
      fragments of APUS support code from arch/powerpc which have been
      copied from arch/ppc.
      
      A few APUS references are left in asm-powerpc in .h files which are
      still used from arch/ppc.
      Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f21f49ea
    • B
      [POWERPC] Rewrite IO allocation & mapping on powerpc64 · 3d5134ee
      Benjamin Herrenschmidt 提交于
      This rewrites pretty much from scratch the handling of MMIO and PIO
      space allocations on powerpc64.  The main goals are:
      
       - Get rid of imalloc and use more common code where possible
       - Simplify the current mess so that PIO space is allocated and
         mapped in a single place for PCI bridges
       - Handle allocation constraints of PIO for all bridges including
         hot plugged ones within the 2GB space reserved for IO ports,
         so that devices on hotplugged busses will now work with drivers
         that assume IO ports fit in an int.
       - Cleanup and separate tracking of the ISA space in the reserved
         low 64K of IO space. No ISA -> Nothing mapped there.
      
      I booted a cell blade with IDE on PIO and MMIO and a dual G5 so
      far, that's it :-)
      
      With this patch, all allocations are done using the code in
      mm/vmalloc.c, though we use the low level __get_vm_area with
      explicit start/stop constraints in order to manage separate
      areas for vmalloc/vmap, ioremap, and PCI IOs.
      
      This greatly simplifies a lot of things, as you can see in the
      diffstat of that patch :-)
      
      A new pair of functions pcibios_map/unmap_io_space() now replace
      all of the previous code that used to manipulate PCI IOs space.
      The allocation is done at mapping time, which is now called from
      scan_phb's, just before the devices are probed (instead of after,
      which is by itself a bug fix). The only other caller is the PCI
      hotplug code for hot adding PCI-PCI bridges (slots).
      
      imalloc is gone, as is the "sub-allocation" thing, but I do beleive
      that hotplug should still work in the sense that the space allocation
      is always done by the PHB, but if you unmap a child bus of this PHB
      (which seems to be possible), then the code should properly tear
      down all the HPTE mappings for that area of the PHB allocated IO space.
      
      I now always reserve the first 64K of IO space for the bridge with
      the ISA bus on it. I have moved the code for tracking ISA in a separate
      file which should also make it smarter if we ever are capable of
      hot unplugging or re-plugging an ISA bridge.
      
      This should have a side effect on platforms like powermac where VGA IOs
      will no longer work. This is done on purpose though as they would have
      worked semi-randomly before. The idea at this point is to isolate drivers
      that might need to access those and fix them by providing a proper
      function to obtain an offset to the legacy IOs of a given bus.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      3d5134ee
  2. 02 5月, 2007 1 次提交
  3. 24 4月, 2007 1 次提交
    • D
      [POWERPC] Cleanup and fix breakage in tlbflush.h · 62102307
      David Gibson 提交于
      BenH's commit a741e679 in powerpc.git,
      although (AFAICT) only intended to affect ppc64, also has side-effects
      which break 44x.  I think 40x, 8xx and Freescale Book E are also
      affected, though I haven't tested them.
      
      The problem lies in unconditionally removing flush_tlb_pending() from
      the versions of flush_tlb_mm(), flush_tlb_range() and
      flush_tlb_kernel_range() used on ppc64 - which are also used the
      embedded platforms mentioned above.
      
      The patch below cleans up the convoluted #ifdef logic in tlbflush.h,
      in the process restoring the necessary flushes for the software TLB
      platforms.  There are three sets of definitions for the flushing
      hooks: the software TLB versions (revised to avoid using names which
      appear to related to TLB batching), the 32-bit hash based versions
      (external functions) amd the 64-bit hash based versions (which
      implement batching).
      
      It also moves the declaration of update_mmu_cache() to always be in
      tlbflush.h (previously it was in tlbflush.h except for PPC64, where it
      was in pgtable.h).
      
      Booted on Ebony (440GP) and compiled for 64-bit and 32-bit
      multiplatform.
      Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
      Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      62102307
  4. 13 4月, 2007 1 次提交
    • B
      [POWERPC] Fix 32-bit mm operations when not using BATs · ee4f2ea4
      Benjamin Herrenschmidt 提交于
      On hash table based 32 bits powerpc's, the hash management code runs with
      a big spinlock. It's thus important that it never causes itself a hash
      fault. That code is generally safe (it does memory accesses in real mode
      among other things) with the exception of the actual access to the code
      itself. That is, the kernel text needs to be accessible without taking
      a hash miss exceptions.
      
      This is currently guaranteed by having a BAT register mapping part of the
      linear mapping permanently, which includes the kernel text. But this is
      not true if using the "nobats" kernel command line option (which can be
      useful for debugging) and will not be true when using DEBUG_PAGEALLOC
      implemented in a subsequent patch.
      
      This patch fixes this by pre-faulting in the hash table pages that hit
      the kernel text, and making sure we never evict such a page under hash
      pressure.
      Signed-off-by: NBenjamin Herrenchmidt <benh@kernel.crashing.org>
      
       arch/powerpc/mm/hash_low_32.S |   22 ++++++++++++++++++++--
       arch/powerpc/mm/mem.c         |    3 ---
       arch/powerpc/mm/mmu_decl.h    |    4 ++++
       arch/powerpc/mm/pgtable_32.c  |   11 +++++++----
       4 files changed, 31 insertions(+), 9 deletions(-)
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      ee4f2ea4
  5. 19 11月, 2005 1 次提交
    • D
      [PATCH] powerpc: Remove imalloc.h · 800fc3ee
      David Gibson 提交于
      asm-ppc64/imalloc.h is only included from files in arch/powerpc/mm.
      We already have a header for mm local definitions,
      arch/powerpc/mm/mmu_decl.h.  Thus, this patch moves the contents of
      imalloc.h into mmu_decl.h.  The only exception are the definitions of
      PHBS_IO_BASE, IMALLOC_BASE and IMALLOC_END.  Those are moved into
      pgtable.h, next to similar definitions of VMALLOC_START and
      VMALLOC_SIZE.
      
      Built for multiplatform 32bit and 64bit (ARCH=powerpc).
      Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      800fc3ee
  6. 10 10月, 2005 1 次提交
  7. 06 10月, 2005 1 次提交
    • P
      powerpc: Merge lmb.c and make MM initialization use it. · 7c8c6b97
      Paul Mackerras 提交于
      This also creates merged versions of do_init_bootmem, paging_init
      and mem_init and moves them to arch/powerpc/mm/mem.c.  It gets rid
      of the mem_pieces stuff.
      
      I made memory_limit a parameter to lmb_enforce_memory_limit rather
      than a global referenced by that function.  This will require some
      small changes to ppc64 if we want to continue building ARCH=ppc64
      using the merged lmb.c.
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      7c8c6b97
  8. 26 9月, 2005 1 次提交
    • P
      powerpc: Merge enough to start building in arch/powerpc. · 14cf11af
      Paul Mackerras 提交于
      This creates the directory structure under arch/powerpc and a bunch
      of Kconfig files.  It does a first-cut merge of arch/powerpc/mm,
      arch/powerpc/lib and arch/powerpc/platforms/powermac.  This is enough
      to build a 32-bit powermac kernel with ARCH=powerpc.
      
      For now we are getting some unmerged files from arch/ppc/kernel and
      arch/ppc/syslib, or arch/ppc64/kernel.  This makes some minor changes
      to files in those directories and files outside arch/powerpc.
      
      The boot directory is still not merged.  That's going to be interesting.
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      14cf11af
  9. 22 6月, 2005 1 次提交
  10. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4