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  1. 21 7月, 2007 1 次提交
  3. 03 7月, 2007 4 次提交
  5. 14 6月, 2007 1 次提交
  7. 07 6月, 2007 2 次提交
  9. 09 5月, 2007 1 次提交
  11. 24 4月, 2007 3 次提交
  13. 10 3月, 2007 1 次提交
  15. 14 2月, 2007 2 次提交
  17. 13 2月, 2007 3 次提交
  19. 04 12月, 2006 10 次提交
  21. 25 10月, 2006 3 次提交
  23. 16 10月, 2006 1 次提交
  25. 05 10月, 2006 5 次提交
    • A
      [POWERPC] spufs: add infrastructure for finding elf objects · 86767277
      由 Arnd Bergmann 提交于 
      This adds an 'object-id' file that the spe library can
use to store a pointer to its ELF object. This was
originally meant for use by oprofile, but is now
also used by the GNU debugger, if available.

In order for oprofile to find the location in an spu-elf
binary where an event counter triggered, we need a way
to identify the binary in the first place.

Unfortunately, that binary itself can be embedded in a
powerpc ELF binary. Since we can assume it is mapped into
the effective address space of the running process,
have that one write the pointer value into a new spufs
file.

When a context switch occurs, pass the user value to
the profiler so that can look at the mapped file (with
some care).
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      86767277
    • A
      [POWERPC] spufs: add support for read/write on cntl · e1dbff2b
      由 Arnd Bergmann 提交于 
      Writing to cntl can be used to stop execution on the
spu and to restart it, reading from cntl gives the
contents of the current status register.

The access is always in ascii, as for most other files.

This was always meant to be there, but we had a little
problem with writing to runctl so it was left out so
far.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      e1dbff2b
    • A
      [POWERPC] spufs: make mailbox functions handle multiple elements · cdcc89bb
      由 Arnd Bergmann 提交于 
      Since libspe2 will provide a function that can read/write
multiple mailbox elements at once, the kernel should handle
that efficiently.

read/write on the three mailbox files can now access the
spe context multiple times to operate on any number of
mailbox data elements.

If the spu application keeps writing to its outbound
mailbox, the read call will pick up all the data in a
single system call.

Unfortunately, if the user passes an invalid pointer,
we may lose a mailbox element on read, since we can't
put it back. This probably impossible to solve, if the
user also accesses the mailbox through direct register
access.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      cdcc89bb
    • A
      [POWERPC] spufs: use correct pg_prot for mapping SPU local store · ac91cb8d
      由 Arnd Bergmann 提交于 
      This hopefully fixes a long-standing bug in the spu file system.
An spu context comes with local memory that can be either saved
in kernel pages or point directly to a physical SPE.

When mapping the physical SPE, that mapping needs to be cache-inhibited.
For simplicity, we used to map the kernel backing memory that way
too, but unfortunately that was not only inefficient, but also incorrect
because the same page could then be accessed simultaneously through
a cacheable and a cache-inhibited mapping, which is not allowed
by the powerpc specification and in our case caused data inconsistency
for which we did a really ugly workaround in user space.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      ac91cb8d
    • B
      [POWERPC] spufs: cell spu problem state mapping updates · 27d5bf2a
      由 Benjamin Herrenschmidt 提交于 
      This patch adds a new "psmap" file to spufs that allows mmap of all of
the problem state mapping of SPEs. It is compatible with 64k pages. In
addition, it removes mmap ability of individual files when using 64k
pages, with the exception of signal1 and signal2 which will both map the
entire 64k page holding both registers. It also removes
CONFIG_SPUFS_MMAP as there is no point in not building mmap support in
spufs.

It goes along a separate patch to libspe implementing usage of that new
file to access problem state registers.

Another patch will follow up to fix races opened up by accessing
the 'runcntl' register directly, which is made possible with this
patch.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      27d5bf2a
  27. 26 9月, 2006 1 次提交
  29. 28 6月, 2006 1 次提交
  31. 26 6月, 2006 1 次提交