With this patch we introduce unified kernel support for NIOS II.
Not all test cases have been ported, but the following command
currently succeeds with 43/43 passing test cases:
$ sanitycheck --arch=nios2 -xKERNEL_TYPE=unified \
--tag=unified_capable
Issue: ZEP-934
Change-Id: Id8effa0369a6a22c4d0a789fa2a8e108af0e0786
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
The toolchain headers included an abstraction for defining symbol
names in assembly context in the situation where we're using a
DOS-style assembler that automatically prepends an underscore to
symbol names.
We aren't. Zephyr is an ELF platform. None of our toolchains do
this. Nothing sets the "TOOL_PREPENDS_UNDERSCORE" macro from within
the project, and it surely isn't an industry standard. Yank it out.
Now we can write assembler labels in natural syntax, and a few other
things fall out to simplify too.
(NOTE: these headers contain assembly code and will fail checkpatch.
That is an expected false positive.)
Change-Id: Ic89e74422b52fe50b3b7306a0347d7a560259581
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
We are not going to handle unimplemented math instruction
exceptions at runtime. Remove remaining comments and exports
related to this. We don't need to leave a gap in the exception
stack frame for it either.
Change-Id: I4f1f3980a0e43bbf6f2f7488a9182f7acb06be05
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Before we were hard-coding them in the assembly file. Makes it
easier to alter the layout of the struct.
Change-Id: I619dc67c68ff87fe60de429a69b2f604292d270c
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
We want to pass along the stack pointer, not dereference it.
Change-Id: I554eff316bffe50654942746e7960b561abb413b
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Nios II CPUs vary in configuration on whether they support
'mul', 'mulx', and 'div' family of instructions. The compiler
can be told to use GCC integer library routines instead if
needed.
Ideally we would just pull the configuration out of system.h,
but pulling include file #defines into the Make environment
will involve some build system work that is best left to a
later improvement.
We've decided to take this build-time approach rather than
handle unimplemented instruction exceptions, so remove the
hook in exception.S
Change-Id: I05be0d5ed4c1a49b23dca1550ee66fd5891044d2
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
For this implementation, the presence of a value in global
_offload_routine signifies to the exception code that we should
enter the IRQ handling code even if there are no bits enabled
in ipending. The 'trap' instruction gets us into the exception
handling code.
Change-Id: Iac96adba0eaf24b54ac28678a31c26517867a4d2
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Supports Internal Interrupt Controller only for now; EIC
supoort tracked in ZEP-258.
Change-Id: I2d9c5180e61c06b377fce4bda8a59042b68d58f2
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
