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* MIPS: Use CONFIG_CPU_MIPSR2 in csum_partial.SGabor Juhos2013-03-121-2/+2
| | | | | | | | | | | | | The csum_partial implementation contain optimalizations for the MIPS R2 instruction set. This optimization is never enabled however because the if directive uses the CPU_MIPSR2 constant which is not defined anywhere. Use the CONFIG_CPU_MIPSR2 constant instead. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4971/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Whitespace cleanup.Ralf Baechle2013-02-011-21/+21
| | | | | | | | Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: IP checksums: Optimize adjust of sum on buffers of odd alignment.Ralf Baechle2008-10-111-11/+24
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: IP checksums: Remove unncessary .set pseudosRalf Baechle2008-10-111-12/+0
| | | | | | They possibly silence meaningful warnings ... Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: IP checksums: Remove unncessary folding of sum to 16 bit.Ralf Baechle2008-10-111-10/+0
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix 64-bit IP checksum codeAtsushi Nemoto2008-09-211-4/+17
| | | | | | | | | | | | Use unsigned loads to avoid possible misscalculation of IP checksums. This bug was instruced in f761106cd728bcf65b7fe161b10221ee00cf7132 (lmo) / ed99e2bc1dc5dc54eb5a019f4975562dbef20103 (kernel.org). [Original fix by Atsushi. Improved instruction scheduling and fix for unaligned unsigned load by me -- Ralf] Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Eleminate local symbols from the symbol table.Ralf Baechle2008-01-291-107/+107
| | | | | | | | | These symbols appear in oprofile output, stacktraces and similar but only make the output harder to read. Many identical symbol names such as "both_aligned" were also being used in multiple source files making it impossible to see which file actually was meant. So let's get rid of them. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] R4000/R4400 daddiu erratum workaroundMaciej W. Rozycki2008-01-291-10/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This complements the generic R4000/R4400 errata workaround code and adds bits for the daddiu problem. In most places it just modifies handwritten assembly code so that the assembler is allowed to use a temporary register as daddiu may now be treated as a macro that expands to a sequence of li and daddu. It is the AT register or, where AT is unavailable or used explicitly for another purpose, an explicitly-named register is selected, using the .set at=<reg> feature added recently to gas. This feature is only used if CONFIG_CPU_DADDI_WORKAROUNDS has been set, so if the workaround remains disabled, the required version of binutils stays unchanged. Similarly, daddiu instructions put in branch delay slots in noreorder fragments are now taken out of them and the assembler is allowed to reorder them itself as possible (which it does making the whole idea of scheduling them into delay slots manually questionable). Also in the very few places where such a simple conversion was not possible, a handcoded longer sequence is implemented. Other than that there are changes to code responsible for building the TLB fault and page clear/copy handlers to avoid daddiu as appropriate. These are only effective if the erratum is verified to be present at the run time. Finally there is a trivial update to __delay(), because it uses daddiu in a branch delay slot. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] csum_partial and copy in parallelAtsushi Nemoto2007-01-081-0/+442
| | | | | | | | | Implement optimized asm version of csum_partial_copy_nocheck, csum_partial_copy_from_user and csum_and_copy_to_user which can do calculate and copy in parallel, based on memcpy.S. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Optimize csum_partial for 64bit kernelAtsushi Nemoto2006-12-091-22/+54
| | | | | | | Make csum_partial 64-bit powered. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Optimize flow of csum_partialAtsushi Nemoto2006-12-091-75/+54
| | | | | | | | | Delete dead codes at end of the function and move small_csumcopy there. This makes some labels (maybe_end_cruft, small_memcpy, end_bytes, out) needless and eliminates some branches. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Make csum_partial more readableAtsushi Nemoto2006-12-091-70/+74
| | | | | | | Use standard o32 register name instead of T0, T1, etc, like memcpy.S. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Unify csum_partial.SAtsushi Nemoto2006-12-041-0/+258
The 32-bit version and 64-bit version are almost equal. Unify them. This makes further improvements (for example, copying with parallel, supporting PREFETCH, etc.) easier. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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