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  1. 21 12月, 2007 3 次提交
  3. 24 12月, 2007 1 次提交
  5. 27 1月, 2008 2 次提交
  7. 16 1月, 2008 1 次提交
    • M
      Fix Blackfin HARDWARE_PM support · 7d2284b0
      由 Mathieu Desnoyers 提交于 
      This patch restores the blackfin Hardware Performance Monitor Profiling
support that was killed by the combining of instrumentation menus in
commit 09cadedb.

Since there seems to be no good reason to behave differently from other
architectures, it now automatically selects the hardware performance
counters whenever the profiling is activated.

mach-common/irqpanic.c: pm_overflow calls pm_overflow_handler which is
in oprofile/op_model_bf533.c.  I doubt that setting HARDWARE_PM as "m"
will work at all, since the pm_overflow_handler should be in the core
kernel image because it is called by irqpanic.c.

Therefore, I change HARDWARE_PM from a tristate to a bool.

The whole arch/$(ARCH)/oprofile/ is built depending on CONFIG_OPROFILE. Since
part of the HARDWARE_PM support files sits in this directory, it makes sense to
also depend on OPROFILE, not only PROFILING. Since OPROFILE already depends on
PROFILING, it is correct to only depend on OPROFILE only.

Thanks to Adrian Bunk for finding this bug and providing an initial
patch.
Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: Adrian Bunk <adrian.bunk@movial.fi>
CC: Randy Dunlap <randy.dunlap@oracle.com>
CC: bryan.wu@analog.com
Acked-by: NRobin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      7d2284b0
  9. 21 11月, 2007 16 次提交
  11. 18 11月, 2007 2 次提交
  13. 17 11月, 2007 1 次提交
  15. 18 11月, 2007 1 次提交
  17. 17 11月, 2007 1 次提交
    • M
      Blackfin arch: Add assembly function insl_16 · 5c91fb90
      由 Michael Hennerich 提交于 
      /*
 * CPUs often take a performance hit when accessing unaligned memory
 * locations. The actual performance hit varies, it can be small if the
 * hardware handles it or large if we have to take an exception and fix
 * it
 * in software.
 *
 * Since an ethernet header is 14 bytes network drivers often end up
 * with
 * the IP header at an unaligned offset. The IP header can be aligned by
 * shifting the start of the packet by 2 bytes. Drivers should do this
 * with:
 *
 * skb_reserve(NET_IP_ALIGN);
 *
 * The downside to this alignment of the IP header is that the DMA is
 * now
 * unaligned. On some architectures the cost of an unaligned DMA is high
 * and this cost outweighs the gains made by aligning the IP header.
 *
 * Since this trade off varies between architectures, we allow
 * NET_IP_ALIGN
 * to be overridden.
 */

This new function insl_16 allows to read form 32-bit IO and writes to
16-bit aligned memory. This is useful in above described scenario -
In particular with the AXIS AX88180 Gigabit Ethernet MAC.
Once the device is in 32-bit mode, reads from the RX FIFO always
decrements 4bytes.
While on the other side the destination address in SDRAM is always
16-bit aligned.
If we use skb_reserve(0) the receive buffer is 32-bit aligned but later
we hit a unaligned exception in the IP code.
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>
      5c91fb90
  19. 23 11月, 2007 1 次提交
  21. 17 11月, 2007 2 次提交
  23. 18 11月, 2007 1 次提交
  25. 17 11月, 2007 1 次提交
  27. 15 11月, 2007 5 次提交
  29. 22 11月, 2007 1 次提交
  31. 15 11月, 2007 1 次提交