linux-toradex.git/arch/xtensa/kernel/coprocessor.S, branch v3.17

xtensa: keep a3 and excsave1 on entry to exception handlers

2013-09-06T16:47:41+00:00

Based on the SMP patch by Joe Taylor and subsequent fixes.
Preserve exception table pointer (normally stored in excsave1 SR) as it
cannot be easily restored in SMP environment.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: clean up files to make them code-style compliant

2012-12-19T05:10:25+00:00

Remove heading and trailing spaces, trim trailing lines, and wrap lines
that are longer than 80 characters.

Signed-off-by: Chris Zankel

xtensa: provide proper assembler function boundaries with ENDPROC()

2012-12-19T05:10:20+00:00

Use ENDPROC() to mark the end of assembler functions.

Signed-off-by: Chris Zankel

xtensa: reorganize SR referencing

2012-10-16T04:48:08+00:00

- reference SRs by names where possible, not by numbers;
- get rid of __stringify around SR names where possible;
- remove unneeded SR names from asm/regs.h;
- add SREG_ prefix to remaining SR names;

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

[XTENSA] Add support for configurable registers and coprocessors

2008-02-14T01:41:43+00:00

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

[PATCH] xtensa: remove extra header files

2006-12-10T17:55:39+00:00

The Xtensa port contained many header files that were never needed.  This
rather lengthy patch removes all those files.  Unfortunately, there were
many dependencies that needed to be updated, so this patch touches quite a
few source files.

Signed-off-by: Chris Zankel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel 
Signed-off-by: Adrian Bunk

[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3

2005-06-24T07:05:21+00:00

The attached patches provides part 3 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds