Support RV32/RV64 mainline/metal stackings (#586)

* Support mainline FreeRTOS instead of metal FreeRTOS

I'll have to add an option or something before this can be merged.

The stack pointer value for suspended threads is computed, and I didn't
check that it's right. Can't be written.
Does not support accessing gp/tp in suspended threads.

Change-Id: Ibe7f5167b970d5990a296e968df2b4480135d673
Signed-off-by: Tim Newsome <tim@sifive.com>

* Add riscv_freertos_stacking command.

This lets the user describe how registers are stored on the stack.

Change-Id: I052188fa9c6cb4f8670fa4b01a8878272ed6fc4d

* Redo how we handle offsets in FreeRTOS.

Instead of hard-coding them for each "target," hard code the data types
in FreeRTOS list structures, and compute the offsets based on size of
pointers and ubase_t types.

Doesn't work right now.

Change-Id: I444cd1ef47121190e2222f19a67edf3c6155a96a

* Correctly get thread list.

Works on RV32 and RV64.

Change-Id: I27768aef698475bef425d6a7e27ea609c9b9a1b6

* Fix SP calculation and RV64 register stacking.

Smoketest now passes on spike with both RV32 and RV64.

Change-Id: I94b43e041abe5370a833bd3afb4a2a8591538d7a
Signed-off-by: Tim Newsome <tim@sifive.com>

* Style fixes.

Change-Id: I269b5aac8c233022c41ebc8ac8c5aeb437882719
Signed-off-by: Tim Newsome <tim@sifive.com>

* Style fix.

Change-Id: I18fbff7dcaad9bd35f0942598c05c2a45bdb9f3b
Signed-off-by: Tim Newsome <tim@sifive.com>

0 files changed, 0 insertions, 0 deletions