hwstub: Add ajt213x lua interface for DSP block

With this you can upload and run code on DSP core in atj213x.

The files can be produced using as2181. You can download
this assembler from https://github.com/wodz/as2181
You should use extended mode (-x switch) since DSP core
in atj is non standard and uses 24bit operands.
PX register has different meaning as well and is used as MSB
when loading other registers with immediates (immediate field
is 16bit in instruction so to set register to 24bit value
you need to store MSB in PX prior to this).

MAC MR is 56bit accordingly.

HIP interface seems to be mapped at standard addresses
(except that regular 218x doesn't have HIP).

Have a fun!

Change-Id: I9a80ca0dd3718ba8435ae8579bfffa66e067e022

1 files changed, 1 insertions, 0 deletions

diff --git a/utils/hwstub/tools/lua/atj.lua b/utils/hwstub/tools/lua/atj.lua
index 1f59a141fc..a1ad0c7505 100644
--- a/utils/hwstub/tools/lua/atj.lua
+++ b/utils/hwstub/tools/lua/atj.lua
@@ -7,3 +7,4 @@ ATJ = {}
 hwstub.soc:select("atj213x")
 require "atj/gpio"
 require "atj/lcm"
+require "atj/dsp"