BMC/Intel-BMC/linux.git/arch/xtensa/kernel/coprocessor.S, branch dev-5.4

xtensa: fix build for cores with coprocessors

2019-07-25T00:44:42+00:00

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

xtensa: abstract 'entry' and 'retw' in assembly code

2019-07-08T17:04:48+00:00

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

xtensa: simplify coprocessor.S

2018-12-04T22:08:23+00:00

Use addresses instead of offsets and drop unneeded offset -> address calculations. Don't generate any code for undefined coprocessors. Signed-off-by: Max Filippov

xtensa: drop unused coprocessor helper functions

2018-12-03T09:39:23+00:00

coprocessor_save, coprocessor_load and coprocessor_restore are neither used nor exported for use by modules. Drop them. Signed-off-by: Max Filippov

xtensa: use call instead of callx in assembly code

2017-12-10T22:48:52+00:00

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

xtensa: drop unused fast_io_protect function

2017-05-01T13:58:31+00:00

fast_io_protect is not used anywhere, drop its definition. Signed-off-by: Max Filippov

xtensa: split uaccess.h into C and asm sides

2016-09-28T01:15:21+00:00

Signed-off-by: Al Viro

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