android_kernel_motorola_sm6225/include/asm-xtensa/variant-fsf
Chris Zankel c658eac628 [XTENSA] Add support for configurable registers and coprocessors
The Xtensa architecture allows to define custom instructions and
registers. Registers that are bound to a coprocessor are only
accessible if the corresponding enable bit is set, which allows
to implement a 'lazy' context switch mechanism. Other registers
needs to be saved and restore at the time of the context switch
or during interrupt handling.

This patch adds support for these additional states:

- save and restore registers that are used by the compiler upon
  interrupt entry and exit.
- context switch additional registers unbound to any coprocessor
- 'lazy' context switch of registers bound to a coprocessor
- ptrace interface to provide access to additional registers
- update configuration files in include/asm-xtensa/variant-fsf

Signed-off-by: Chris Zankel <chris@zankel.net>
2008-02-13 17:41:43 -08:00
..
core.h [PATCH] xtensa: remove extra header files 2006-12-10 09:55:39 -08:00
tie-asm.h [XTENSA] Add support for configurable registers and coprocessors 2008-02-13 17:41:43 -08:00
tie.h [XTENSA] Add support for configurable registers and coprocessors 2008-02-13 17:41:43 -08:00