linux.git/arch/xtensa/kernel/coprocessor.S, branch v5.4.96 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git xtensa: fix build for cores with coprocessors 2019-07-25T00:44:42+00:00 Max Filippov jcmvbkbc@gmail.com 2019-07-25T00:39:47+00:00 e3cacb73e626d885b8cf24103fed0ae26518e3c4 Assembly entry/return abstraction change didn't add asmmacro.h include statement to coprocessor.S, resulting in references to undefined macros abi_entry and abi_ret on cores that define XTENSA_HAVE_COPROCESSORS. Fix that by including asm/asmmacro.h from the coprocessor.S. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 
Assembly entry/return abstraction change didn't add asmmacro.h include
statement to coprocessor.S, resulting in references to undefined macros
abi_entry and abi_ret on cores that define XTENSA_HAVE_COPROCESSORS.
Fix that by including asm/asmmacro.h from the coprocessor.S.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: abstract 'entry' and 'retw' in assembly code 2019-07-08T17:04:48+00:00 Max Filippov jcmvbkbc@gmail.com 2019-05-13T03:28:25+00:00 d6d5f19e21d98c0607ff029e4e2e508d4cdd1d5a Provide abi_entry, abi_entry_default, abi_ret and abi_ret_default macros that allocate aligned stack frame in windowed and call0 ABIs. Provide XTENSA_SPILL_STACK_RESERVE macro that specifies required stack frame size when register spilling is involved. Replace all uses of 'entry' and 'retw' with the above macros. This makes most of the xtensa assembly code ready for XEA3 and call0 ABI. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 
Provide abi_entry, abi_entry_default, abi_ret and abi_ret_default macros
that allocate aligned stack frame in windowed and call0 ABIs.
Provide XTENSA_SPILL_STACK_RESERVE macro that specifies required stack
frame size when register spilling is involved.
Replace all uses of 'entry' and 'retw' with the above macros.
This makes most of the xtensa assembly code ready for XEA3 and call0 ABI.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: simplify coprocessor.S 2018-12-04T22:08:23+00:00 Max Filippov jcmvbkbc@gmail.com 2018-11-26T07:32:28+00:00 5dacbbef3d29598dcb6ecf747a7dae4fbb4ce039 Use addresses instead of offsets and drop unneeded offset -> address calculations. Don't generate any code for undefined coprocessors. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 
Use addresses instead of offsets and drop unneeded offset -> address
calculations. Don't generate any code for undefined coprocessors.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: drop unused coprocessor helper functions 2018-12-03T09:39:23+00:00 Max Filippov jcmvbkbc@gmail.com 2018-11-26T21:15:21+00:00 3ffc2df9c76d3e1e02367dc3361902c1e9870b5d coprocessor_save, coprocessor_load and coprocessor_restore are neither used nor exported for use by modules. Drop them. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 
coprocessor_save, coprocessor_load and coprocessor_restore are neither
used nor exported for use by modules. Drop them.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: use call instead of callx in assembly code 2017-12-10T22:48:52+00:00 Max Filippov jcmvbkbc@gmail.com 2017-12-10T02:44:11+00:00 2da03d4114b2587f0e8e45f4862074e34daee64e Now that xtensa assembly sources are compiled with -mlongcalls let the assembler and linker relax call instructions into l32r + callx where needed. This change makes the code cleaner and potentially a bit faster. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 
Now that xtensa assembly sources are compiled with -mlongcalls let the
assembler and linker relax call instructions into l32r + callx where
needed. This change makes the code cleaner and potentially a bit faster.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: drop unused fast_io_protect function 2017-05-01T13:58:31+00:00 Max Filippov jcmvbkbc@gmail.com 2015-01-26T21:27:05+00:00 d9c7710db90c0069ca5eebc060d4571aabea8f74 fast_io_protect is not used anywhere, drop its definition. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 
fast_io_protect is not used anywhere, drop its definition.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: split uaccess.h into C and asm sides 2016-09-28T01:15:21+00:00 Al Viro viro@zeniv.linux.org.uk 2016-09-04T18:26:36+00:00 76580237d13fbfcd55acbc8fdd6726be7080a275 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
xtensa: keep a3 and excsave1 on entry to exception handlers 2013-09-06T16:47:41+00:00 Max Filippov jcmvbkbc@gmail.com 2013-07-03T16:23:28+00:00 99d5040ebc3cccc90dfe031f615ac3fbc79905b6 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 <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net> 
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 <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
xtensa: clean up files to make them code-style compliant 2012-12-19T05:10:25+00:00 Chris Zankel chris@zankel.net 2012-11-29T00:53:51+00:00 c4c4594b005d89b56964071bbbdeb07daac5bc76 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> 
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>
xtensa: provide proper assembler function boundaries with ENDPROC() 2012-12-19T05:10:20+00:00 Chris Zankel chris@zankel.net 2012-11-17T00:16:20+00:00 d1538c4675f37d0eeb34bd38bec798b3b29a5a7e Use ENDPROC() to mark the end of assembler functions. Signed-off-by: Chris Zankel <chris@zankel.net> 
Use ENDPROC() to mark the end of assembler functions.

Signed-off-by: Chris Zankel <chris@zankel.net>