1. 06 Jul, 2010 4 commits
    • Chris Metcalf's avatar
      arch/tile: Shrink the tile-opcode files considerably. · 863fbac6
      Chris Metcalf authored
      The C file (tile-desc_{32,64}.c) was about 300KB before this change,
      and is now shrunk down to 100K.  The original file included support
      for BFD in the binutils toolchain, which is not necessary in the
      kernel; the kernel version only needs to include enough support to
      enable the single-stepper and backtracer.
      Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      863fbac6
    • Chris Metcalf's avatar
      arch/tile: Add driver to enable access to the user dynamic network. · 9f9c0382
      Chris Metcalf authored
      This network (the "UDN") connects all the cpus on the chip in a
      wormhole-routed dynamic network.  Subrectangles of the chip can
      be allocated by a "create" ioctl on /dev/hardwall, and then to access the
      UDN in that rectangle, tasks must perform an "activate" ioctl on that
      same file object after affinitizing themselves to a single cpu in
      the region.  Sending a wormhole-routed message that tries to leave
      that subrectangle causes all activated tasks to receive a SIGILL
      (just as they would if they tried to access the UDN without first
      activating themselves to a hardwall rectangle).
      
      The original submission of this code to LKML had the driver
      instantiated under /proc/tile/hardwall.  Now we just use a character
      device for this, conventionally /dev/hardwall.  Some futures planning
      for the TILE-Gx chip suggests that we may want to have other types of
      devices that share the general model of "bind a task to a cpu, then
      'activate' a file descriptor on a pseudo-device that gives access to
      some hardware resource".  As such, we are using a device rather
      than, for example, a syscall, to set up and activate this code.
      
      As part of this change, the compat_ptr() declaration was fixed and used
      to pass the compat_ioctl argument to the normal ioctl.  So far we limit
      compat code to 2GB, so the difference between zero-extend and sign-extend
      (the latter being correct, eventually) had been overlooked.
      Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      9f9c0382
    • Chris Metcalf's avatar
      arch/tile: Enable more sophisticated IRQ model for 32-bit chips. · fb702b94
      Chris Metcalf authored
      This model is based on the on-chip interrupt model used by the
      TILE-Gx next-generation hardware, and interacts much more cleanly
      with the Linux generic IRQ layer.
      
      The change includes modifications to the Tilera hypervisor, which
      are reflected in the hypervisor headers in arch/tile/include/arch/.
      Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
      Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
      fb702b94
    • Chris Metcalf's avatar
      Move list types from <linux/list.h> to <linux/types.h>. · de5d9bf6
      Chris Metcalf authored
      This allows a list_head (or hlist_head, etc.) to be used from places
      that used to be impractical, in particular <asm/processor.h>, which
      used to cause include file recursion: <linux/list.h> includes
      <linux/prefetch.h>, which always includes <asm/processor.h> for the
      prefetch macros, as well as <asm/system.h>, which often includes
      <asm/processor.h> directly or indirectly.
      
      This avoids a lot of painful workaround hackery on the tile
      architecture, where we use a list_head in the thread_struct to chain
      together tasks that are activated on a particular hardwall.
      Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
      Reviewed-by: default avatarMatthew Wilcox <willy@linux.intel.com>
      de5d9bf6
  2. 25 Jun, 2010 2 commits
  3. 12 Jun, 2010 1 commit
  4. 11 Jun, 2010 33 commits