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  1. 06 Jul, 2010 6 commits
    • Chris Metcalf's avatar
      arch/tile: Split the icache flush code off to a generic <arch> header. · c78095bd
      Chris Metcalf authored 
      This code is used in other places in our system than in Linux, so
to share it we now implement it as an inline function in our low-level
<arch> headers, and instantiate it in one file in Linux's arch/tile/lib.
The file is now cacheflush.c and is C code rather than the strangely-named
and assembler-implemented __invalidate_icache.S.
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      c78095bd
    • Chris Metcalf's avatar
      arch/tile: Fix bug in support for atomic64_xx() ops. · 2db09827
      Chris Metcalf authored 
      This wasn't properly tested until the perf-event subsystem started
to get brought up under the tile architecture.

The bug caused bogus atomic64_cmpxchg() values to be returned,
among other things.
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      2db09827
    • 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
  3. 25 Jun, 2010 2 commits
  5. 12 Jun, 2010 1 commit
  7. 11 Jun, 2010 31 commits
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