This patch adds a x86_64 architecture and qemu_x86_64 board to Zephyr.
Only the basic architecture support needed to run 64 bit code is
added; no drivers are added, though a low-level console exists and is
wired to printk().
The support is built on top of a "X86 underkernel" layer, which can be
built in isolation as a unit test on a Linux host.
Limitations:
+ Right now the SDK lacks an x86_64 toolchain. The build will fall
back to a host toolchain if it finds no cross compiler defined,
which is tested to work on gcc 8.2.1 right now.
+ No x87/SSE/AVX usage is allowed. This is a stronger limitation than
other architectures where the instructions work from one thread even
if the context switch code doesn't support it. We are passing
-no-sse to prevent gcc from automatically generating SSE
instructions for non-floating-point purposes, which has the side
effect of changing the ABI. Future work to handle the FPU registers
will need to be combined with an "application" ABI distinct from the
kernel one (or just to require USERSPACE).
+ Paging is enabled (it has to be in long mode), but is a 1:1 mapping
of all memory. No MMU/USERSPACE support yet.
+ We are building with -mno-red-zone for stack size reasons, but this
is a valuable optimization. Enabling it requires automatic stack
switching, which requires a TSS, which means it has to happen after
MMU support.
+ The OS runs in 64 bit mode, but for compatibility reasons is
compiled to the 32 bit "X32" ABI. So while the full 64 bit
registers and instruction set are available, C pointers are 32 bits
long and Zephyr is constrained to run in the bottom 4G of memory.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The latest mbedTLS (2.12) release increased resources requirements on
Zephyr, so it was required increasing the minimum SRAM to run this test
and the main stack size.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Some changes were made in the sample implementation that made the test
fail due to differences in the expected output.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Following tests were failing on a microcontroller with 32KB flash:
test-mbedtls
kernel.common
The min_flash option has been added in the test case yaml files.
Signed-off-by: Diego Sueiro <diego.sueiro@gmail.com>
The output of those samples can be parsed and verified by sanitycheck,
so lets use the console harness for this.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
We have many testcases doing filtering both on the architecture level
and the platform level, which is redundant. Also many testcases are
running the same test twice on the same SoC for no good reason, cleanup
the tests and cleanup the filtering.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This will prepare test cases and samples with metadata and information
that will be consumed by the sanitycheck script which will be changed to
parse YAML files instead of ini.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
