microwatt

Commit Graph

Author	SHA1	Message	Date
Paul Mackerras	18120f153d	MMU: Implement a vestigial partition table This implements a 1-entry partition table, so that instead of getting the process table base address from the PRTBL SPR, the MMU now reads the doubleword pointed to by the PTCR register plus 8 to get the process table base address. The partition table entry is cached. Having the PTCR and the vestigial partition table reduces the amount of software change required in Linux for Microwatt support. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>	4 years ago
Anton Blanchard	d26a157cd7	Add a test to read from all SPRs Make sure the SPRs are initialized and we can't read X state. (Mikey: rebased and added console/bin file for testing) Signed-off-by: Anton Blanchard <anton@linux.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org>	5 years ago

Author

SHA1

Message

Date

Paul Mackerras

18120f153d

MMU: Implement a vestigial partition table

This implements a 1-entry partition table, so that instead of getting
the process table base address from the PRTBL SPR, the MMU now reads
the doubleword pointed to by the PTCR register plus 8 to get the
process table base address.  The partition table entry is cached.

Having the PTCR and the vestigial partition table reduces the amount
of software change required in Linux for Microwatt support.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

Anton Blanchard

d26a157cd7

Add a test to read from all SPRs

Make sure the SPRs are initialized and we can't read X state.

(Mikey: rebased and added console/bin file for testing)

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>

2 Commits (caravel-mpw5-20220322)