linux-toradex.git/arch/x86_64/lib, branch v2.6.17.3

[PATCH] x86_64: remove dead do_softirq_thunk

2006-03-25T17:10:53+00:00

Appearantly a left-over...

Signed-off-by: Jan Beulich 
Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] x86_64: Undo the earlier changes to remove unrolled copy/memset functions

2006-02-05T00:43:13+00:00

They cause quite bad performance regressions on Netburst
This is temporary until we can get new optimized functions
for these CPUs.

This undoes changes that were done in 2.6.15 and in 2.6.16-rc1,
essentially bringing the code back to 2.6.14 level. Only change
is I renamed the X86_FEATURE_K8_C flag to X86_FEATURE_REP_GOOD
and fixed the check for the flag and also fixed some comments.

Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] Add faster __iowrite32_copy routine for x86_64

2006-02-01T16:53:13+00:00

This assembly version is measurably faster than the generic version in
lib/iomap_copy.c.

Signed-off-by: Bryan O'Sullivan 
Cc: Andi Kleen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] x86_64: Display meaningful part of filename during BUG()

2006-01-12T03:05:03+00:00

When building in a separate objtree, file names produced by BUG() & Co. can
get fairly long; printing only the first 50 characters may thus result in
(almost) no useful information. The following change makes it so that rather
the last 50 characters of the filename get printed.

Signed-Off-By: Jan Beulich 

Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] x86_64: Clean up copy_*_user

2006-01-12T03:04:55+00:00

- Remove optimization for old B stepping Opteron
- Make the fast path for copies with a multiple of eight length faster.
- Minor instruction rearrangement to hopefully avoid a pipeline
stall or two.
- Add comment about errata to consider.

Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] x86_64: Make udelay more accurate

2006-01-12T03:04:52+00:00

The attempt to avoid overflow in __delay caused varying precision
on different CPUs depending on differences in the CPU speed.

We should be able to do this multiplication with out overflowing
provided the
cpu is running at less than about 128 GHz.  xloops < 20000 * 0x10c6.
loops_per_jiffy * HZ <= cpu_clock_speed.  So if the cpu clock speed
< 2^64/(20000 * 0x10c6) = 2^64/ 51E6CC0 < 2^64/2^27 = 2^37 = 128G we
will not overflow the calculation.

Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] x86_64: Remove optimization for B stepping AMD K8

2005-11-15T03:55:17+00:00

B stepping were the first shipping Opterons. memcpy/memset/copy_page/
clear_page had special optimized version for them. These are really
old and in the minority now and the difference to the generic versions
(using rep microcode) is not that big anyways. So just remove them.

TODO: figure out optimized versions for Intel Netburst based EM64T

Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] x86-64: bitops fix for -Os

2005-11-03T03:41:32+00:00

This fixes the x86-64 find_[first|next]_zero_bit() function for the
end-of-range case.  It didn't test for a zero size, and the "rep scas"
would do entirely the wrong thing.

Signed-off-by: Alexandre Oliva 
Signed-off-by: Linus Torvalds

[LIB]: Consolidate _atomic_dec_and_lock()

2005-09-15T04:47:01+00:00

Several implementations were essentialy a common piece of C code using
the cmpxchg() macro.  Put the implementation in one spot that everyone
can share, and convert sparc64 over to using this.

Alpha is the lone arch-specific implementation, which codes up a
special fast path for the common case in order to avoid GP reloading
which a pure C version would require.

Signed-off-by: David S. Miller

kbuild: alpha,x86_64 use generic asm-offsets.h support

2005-09-09T19:28:48+00:00

Delete obsolete stuff from arch makefiles
Rename .h file to asm-offsets.h

Signed-off-by: Sam Ravnborg