[Open SoC Debug] CDM-OR1K implementation

SHIVAM AGGARWAL shivam16195 at iiitd.ac.in
Wed May 23 19:33:00 CEST 2018


Here's the link for the register map:
https://docs.google.com/document/d/1Jpvx_1GFhciqRbpWc7ieFMjlYIYZHw04XbJhqBJYUfA/edit?usp=sharing

Please provide your valuable feedback.

- Shivam Aggarwal

*Shivam Aggarwal*
Coordinator | Electroholics
ECE BTech'16

Okhla Industrial Estate,Phase III
New Delhi, India - 110020

On Wed, May 23, 2018 at 9:43 PM, Philipp Wagner <philipp.wagner at tum.de>
wrote:

> Am 23.05.2018 um 18:09 schrieb SHIVAM AGGARWAL:
> >
> > On Wed, May 23, 2018 at 5:44 PM, Philipp Wagner <philipp.wagner at tum.de
> > <mailto:philipp.wagner at tum.de>> wrote:
> >
> >     Hi,
> >
> >     On 05/23/2018 10:36 AM, SHIVAM AGGARWAL wrote:
> >
> >          1.
> >
> >             *Register map for SPRs and GPRs in CDM-OR1K*:
> >
> >         We can easily map 32-bit wide 32 GPRs as two 16-bit OSD specific
> >         registers in the module. We already have access to the debug
> >         unit for setting watchpoints/breakpoints.
> >
> >         In GDB, there are commands like ‘info spr’ used to show the
> >         value of a SPR or group of SPRs and ‘spr’ to set the value of an
> >         individual SPR. There are about 12 groups (permitted upto 32)
> >         with some groups (1, 2 and 3) having 1000+ SPRs.
> >
> >
> >         We can assign address spaces 0x0200-0xffff (about 65023
> >         registers) as module specific registers in CDM-OR1K. The space
> >         is enough to map each or1k register into OSD address space.
> >
> >
> >     Could you list the full register map somewhere in a document (the
> >     list can contain groups, but should list all relevant register
> >     addresses and their mapping to OSD CDM register addresses). The
> >     du_addr_i signal is a 16 bit signal, given that we don't have full
> >     16 bits available for register address in OSD (we can only start
> >     above 0x200) we need to make sure that we map all relevant parts of
> >     the or1k register space to OSD registers.
> >
> >
> > Link:
> > https://drive.google.com/open?id=15EVkp6ij-7tRm2m3mgQqwUAhHUYLOkxG
> > The pdf contains all the information about OR1K Register Set. Section
> > 4.3 contains the list of all the Special Purpose registers. As per my
> > understanding, we have to map each and every register (total 4665 SPRs +
> > 32 GPRs) given in the description.
>
> That link is only the or1k register set. Could you please create a own
> document where you show how these registers are mapped to CDM registers?
> Ideally using (as discussed before) the same register addresses only
> with an offset (i.e. + 0x400).
>
> Philipp
>
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