microblaze reg_addr and new_reg_value outputs

[samuel nobs]

hello,

i am working with xilinx microblaze and i am trying to figure out the
purpose of the two undocumented output signals reg_addr (5 bits wide)
and new_reg_value (32 bits wide).

i assume that reg_addr outputs the register currently written to and
new_reg_value outputs the value written to this register.

is anyone able to confirm my assumptions?

thank you,
sam

 

[Goran Bilski]

Hi Sam,

Your assumption is correct.

The values is however only valid when the signal VALID_INSTR is '1'.
A write is also only happening when REG_WRITE is '1'.

The signal PC_EX is the instruction_address for the executing instruction
MSR_REG contains the current msr register value
PIPE_RUNNING is '1' when the pipeline is running ("no stalls")
INTERRUPT_TAKEN is '1' when an interrupt is acknowledge (when MicroBlaze
is jumping to the interrupt address)
JUMP_TAKEN is '1' when a jump is taken
PREFETCH_ADDR is showing how many instructions that has been prefetched
MB_Halted is '1' when MicroBlaze has been halted by the internal debug logic

Göran

samuel nobs wrote:

hello,

i am working with xilinx microblaze and i am trying to figure out the
purpose of the two undocumented output signals reg_addr (5 bits wide)
and new_reg_value (32 bits wide).

i assume that reg_addr outputs the register currently written to and
new_reg_value outputs the value written to this register.

is anyone able to confirm my assumptions?

thank you,
sam