linux.git/arch/xtensa/kernel/entry.S, branch v2.6.23

[XTENSA] Add support for cache-aliasing

2007-08-27T20:54:16+00:00

Add support for processors that have cache-aliasing issues, such as
the Stretch S5000 processor. Cache-aliasing means that the size of
the cache (for one way) is larger than the page size, thus, a page
can end up in several places in cache depending on the virtual to
physical translation. The method used here is to map a user page
temporarily through the auto-refill way 0 and of of the DTLB.
We probably will want to revisit this issue and use a better
approach with kmap/kunmap.

Signed-off-by: Chris Zankel

[XTENSA] Add support for executable/non-executable feature in the mmu

2007-08-27T20:54:01+00:00

Newer processor versions starting with Xtensa6/LX2 support an 'executable'
bit for memory pages. This bit replaces the 'valid' bit, so it must be
always set to one for older processor versions. To mark a page invalid, we now
set the cache-attributes to b11, which is backward compatible.

Signed-off-by: Chris Zankel

[XTENSA] Remove non-rt signal handling

2007-06-01T00:49:32+00:00

The non-rt signal handling was never really used, so we don't break
anything. This patch also cleans up the signal stack-frame to make
it independent from the processor configuration. It also improves
the method used for controlling single-stepping. We now save and
restore the 'icountlevel' register that controls single stepping
and set or clear the saved state to enable or disable it.

Signed-off-by: Chris Zankel

[PATCH] xtensa: fix system call interface

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

This is a long outstanding patch to finally fix the syscall interface.  The
constants used for the system calls are those we have provided in our libc
patches.  This patch also fixes the shmbuf and stat structure, and fcntl
definitions.

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

[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

[PATCH] xtensa: remove verify_area macros

2006-06-23T14:43:02+00:00

verify_area() is still alive on xtensa in 2.6.17-rc3-git13 It would be nice
to finally be rid of that function across the board.

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

kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h support

2005-09-09T18:57:26+00:00

Delete obsoleted parts form arch makefiles and rename to asm-offsets.h

Signed-off-by: Sam Ravnborg

[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