I mean, visually, something like this, but much smaller:

• CPU
• networking
• disk

And if you have an extra time :) also that:

• sound (by average volume)
• and maybe even terminal activity
• FPS of graphic screen

As in spec,
EEAR register should save the instruction fetch VA when illegal instruction exception.

We should change code in mor1kx_ctrl_cappuccino.v as follow.

    always @(posedge clk `OR_ASYNC_RST)
     if (rst)
       spr_eear <= {OPTION_OPERAND_WIDTH{1'b0}};
     else if (/*padv_ctrl & exception*/ exception_re)
       begin
	  if (except_ibus_err_i | except_itlb_miss_i

The NoC primitives are missing cocotb tests. Old code by @wallento is available at imphil/optimsoc@32162b1 and can potentially be used as starting point.

Description

Currently, we are using a hardcoded performance counter to run kstats(). We should be more flexible than this and use a macro-defined counter instead.

Description

We should drop support for upcalls, since it is invalid in several targets.

Description

Currently, to signal errors, some functions return a negative error code and others return -1 and set the errno variable to indicate the error.

We should rely on one and only one approach to signal the errors, otherwise caos will follow.

Therefore, we should gradually fix the code to signal errors through the errno variable, since it is the standard for Unix systems.