Searched hist:"00273125 c39be9cbf619aef90147354a9ed8c385" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/arch/xtensa/ |
| H A D | Kconfig.debug | diff 00273125c39be9cbf619aef90147354a9ed8c385 Wed Nov 28 01:33:02 CST 2012 Max Filippov <jcmvbkbc@gmail.com> xtensa: add s32c1i sanity check
Add a brief sanity test of S32C1I functionality. This instruction
is needed by the kernel and userland as part of the base ABI
(including GCC atomic builtins, certain threading packages, future
atomic support in the C++ standard, etc). However, correct operation
of this instruction requires some cooperation by hardware external to
the processor (such as bus bridge, bus fabric, or memory controller).
Minimally exercising this mechanism and reporting explicit status
early in the boot process is helpful to chip vendors using the Linux
kernel as a benchmark of correctness of hardware.
As it turns out, S32C1I is not exercised by the kernel and by uClibc
based userland as of early June 2008. This is expected to change
soon as both incorporate more recent open source developments.
Signed-off-by: Marc Gauthier <marc@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
|
| /openbmc/linux/arch/xtensa/include/asm/ |
| H A D | regs.h | diff 00273125c39be9cbf619aef90147354a9ed8c385 Wed Nov 28 01:33:02 CST 2012 Max Filippov <jcmvbkbc@gmail.com> xtensa: add s32c1i sanity check
Add a brief sanity test of S32C1I functionality. This instruction
is needed by the kernel and userland as part of the base ABI
(including GCC atomic builtins, certain threading packages, future
atomic support in the C++ standard, etc). However, correct operation
of this instruction requires some cooperation by hardware external to
the processor (such as bus bridge, bus fabric, or memory controller).
Minimally exercising this mechanism and reporting explicit status
early in the boot process is helpful to chip vendors using the Linux
kernel as a benchmark of correctness of hardware.
As it turns out, S32C1I is not exercised by the kernel and by uClibc
based userland as of early June 2008. This is expected to change
soon as both incorporate more recent open source developments.
Signed-off-by: Marc Gauthier <marc@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
|
| /openbmc/linux/arch/xtensa/kernel/ |
| H A D | setup.c | diff 00273125c39be9cbf619aef90147354a9ed8c385 Wed Nov 28 01:33:02 CST 2012 Max Filippov <jcmvbkbc@gmail.com> xtensa: add s32c1i sanity check
Add a brief sanity test of S32C1I functionality. This instruction
is needed by the kernel and userland as part of the base ABI
(including GCC atomic builtins, certain threading packages, future
atomic support in the C++ standard, etc). However, correct operation
of this instruction requires some cooperation by hardware external to
the processor (such as bus bridge, bus fabric, or memory controller).
Minimally exercising this mechanism and reporting explicit status
early in the boot process is helpful to chip vendors using the Linux
kernel as a benchmark of correctness of hardware.
As it turns out, S32C1I is not exercised by the kernel and by uClibc
based userland as of early June 2008. This is expected to change
soon as both incorporate more recent open source developments.
Signed-off-by: Marc Gauthier <marc@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
|