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2017-12-17xtensa: add support for KASANMax Filippov2-6/+9
Cover kernel addresses above 0x90000000 by the shadow map. Enable HAVE_ARCH_KASAN when MMU is enabled. Provide kasan_early_init that fills shadow map with writable copies of kasan_zero_page. Call kasan_early_init right after mmu initialization in the setup_arch. Provide kasan_init that allocates proper shadow map pages from the memblock and puts these pages into the shadow map for addresses from VMALLOC area to the end of KSEG. Call kasan_init right after memblock initialization. Don't use KASAN for the boot code, MMU and KASAN initialization and page fault handler. Make kernel stack size 4 times larger when KASAN is enabled to avoid stack overflows. GCC 7.3, 8 or newer is required to build the xtensa kernel with KASAN. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2017-12-17xtensa: clean up custom-controlled debug outputMax Filippov1-36/+9
Replace #ifdef'fed/commented out debug printk statements with pr_debug. Replace printk statements with pr_* equivalents. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2017-12-11xtensa: clean up functions in assembly codeMax Filippov5-36/+27
Use ENTRY and ENDPROC throughout arch/xtensa/lib assembly sources. Introduce asm/linkage.h and define xtensa-specific __ALIGN macro there. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2017-12-11xtensa: clean up word alignment macros in assembly codeMax Filippov2-48/+25
Remove duplicate definitions of ALIGN/src_b/__src_b and SSA8/ssa8/__ssa8 from assembly sources and put single definition into asm/asmmacro.h Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2017-12-11xtensa: clean up fixups in assembly codeMax Filippov5-166/+121
Remove duplicate definitions of EX() and similar TRY/CATCH and SRC/DST macros from assembly sources and put single definition into asm/asmmacro.h Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2017-03-29xtensa: get rid of zeroing, use RAW_COPY_USERAl Viro1-68/+48
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-11-02xtensa: fixes for configs without loop optionMax Filippov1-3/+3
Build-time fixes: - make lbeg/lend/lcount save/restore conditional on kernel entry; - don't clear lcount in platform_restart functions unconditionally. Run-time fixes: - use correct end of range register in __endla paired with __loopt, not the unused temporary register. This fixes .bss zero-initialization. Update comments in asmmacro.h; - don't clobber a10 in the usercopy that leads to access to unmapped memory. Cc: <stable@vger.kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2012-12-19xtensa: clean up files to make them code-style compliantChris Zankel6-18/+13
Remove heading and trailing spaces, trim trailing lines, and wrap lines that are longer than 80 characters. Signed-off-by: Chris Zankel <chris@zankel.net>
2012-12-19xtensa: provide proper assembler function boundaries with ENDPROC()Chris Zankel1-1/+4
Use ENDPROC() to mark the end of assembler functions. Signed-off-by: Chris Zankel <chris@zankel.net>
2012-10-16xtensa: fix memmove(), bcopy(), and memcpy().Chris Zankel1-25/+284
- fix memmove to correctly handle overlapping src and dst; - fix memcpy loop ending conditions from signed '<=' to '!='; - modify bcopy to call memmove; Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2008-11-06xtensa: move headers files to arch/xtensa/includeChris Zankel6-6/+6
Move all header files for xtensa to arch/xtensa/include and platform and variant header files to the appropriate arch/xtensa/platforms/ and arch/xtensa/variants/ directories. Moving the files gets also rid of all uses of symlinks in the Makefile. This has been completed already for the majority of the architectures and xtensa is one out of six missing. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Chris Zankel <chris@zankel.net>
2007-06-01[XTENSA] fix sources using deprecated assembler directiveChris Zankel2-32/+34
The assembler directive '.begin literal' is deprecated in the newer versions of the binutils (strncopy_user.S and strnlen_user.S). Signed-off-by: Chris Zankel <chris@zankel.net>
2007-04-26[STRING]: Move strcasecmp/strncasecmp to lib/string.cDavid S. Miller2-33/+1
We have several platforms using local copies of identical code. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-10[PATCH] xtensa: remove extra header filesChris Zankel6-7/+6
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 <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04fix file specification in commentsUwe Zeisberger1-1/+1
Many files include the filename at the beginning, serveral used a wrong one. Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-04Attack of "the the"s in archMatt LaPlante1-2/+2
The patch below corrects multiple occurances of "the the" typos across several files, both in source comments and KConfig files. There is no actual code changed, only text. Note this only affects the /arch directory, and I believe I could find many more elsewhere. :) Signed-off-by: Adrian Bunk <bunk@stusta.de>
2005-06-24[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 4Chris Zankel9-0/+1968
The attached patches provides part 4 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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