Re: [PATCH net-next v2 2/3] net: ethernet: ti: Register the RPMsg driver as network device

[Andrew Lunn]

> >> +	u32 buff_slot_size;
> >> +	/* Base Address for Tx or Rx shared memory */
> >> +	u32 base_addr;
> >> +} __packed;
> > 
> > What do you mean by address here? Virtual address, physical address,
> > DMA address? And whos address is this, you have two CPUs here, with no
> > guaranteed the shared memory is mapped to the same address in both
> > address spaces.
> > 
> > 	Andrew
> 
> The address referred above is physical address. It is the address of Tx and Rx
> buffer under the control of Linux operating over A53 core. The check if the
> shared memory is mapped to the same address in both address spaces is checked
> by the R5 core.

u32 is too small for a physical address. I'm sure there are systems
with more than 4G of address space. Also, i would not assume both CPUs
map the memory to the same physical address.

	Andrew