linux-toradex.git/arch/mips/include/asm/stackframe.h, branch v2.6.33.1 Linux kernel for Apalis and Colibri modules MIPS: Put PGD in C0_CONTEXT for 64-bit R2 processors. 2009-12-17T01:57:01+00:00 David Daney ddaney@caviumnetworks.com 2009-10-14T19:16:56+00:00 82622284dd2f8791f9759f3cef601520a8bc63b2 Processors that support the mips64r2 ISA can in four instructions convert a shifted PGD pointer stored in the upper bits of c0_context into a usable pointer. By doing this we save a memory load and associated potential cache miss in the TLB exception handlers. Since the upper bits of c0_context were holding the CPU number, we move this to the upper bits of c0_xcontext which doesn't have enough bits to hold the PGD pointer, but has plenty for the CPU number. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Processors that support the mips64r2 ISA can in four instructions
convert a shifted PGD pointer stored in the upper bits of c0_context
into a usable pointer.  By doing this we save a memory load and
associated potential cache miss in the TLB exception handlers.

Since the upper bits of c0_context were holding the CPU number, we
move this to the upper bits of c0_xcontext which doesn't have enough
bits to hold the PGD pointer, but has plenty for the CPU number.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
MIPS: Reorder operations in stackframe.h for better scheduling 2009-12-17T01:56:57+00:00 David Daney ddaney@caviumnetworks.com 2009-06-26T16:01:43+00:00 362e696428590f7d0a5d0971a2d04b0372a761b8 Reorder PT ops to avoid pipeline stalls. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Reorder PT ops to avoid pipeline stalls.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
MIPS: Cavium OCTEON multiplier state preservation. 2009-01-11T09:57:24+00:00 David Daney ddaney@caviumnetworks.com 2008-12-11T23:33:33+00:00 2a219b0eaa7bb9f1a7dae4e8ac5b1bf68adab289 For OCTEON, implement a save and restore of the multiplier state across context switches. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
For OCTEON, implement a save and restore of the multiplier state
across context switches.

Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
MIPS: Move headfiles to new location below arch/mips/include 2008-10-11T15:18:52+00:00 Ralf Baechle ralf@linux-mips.org 2008-09-16T17:48:51+00:00 384740dc49ea651ba350704d13ff6be9976e37fe Signed-off-by: Ralf Baechle <ralf@linux-mips.org> 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>