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Paul Mackerras 2843c99a71 MMU: Implement reading of the process table ... This adds the PID register and repurposes SPR 720 as the PRTBL register, which points to the base of the process table. There doesn't seem to be any point to implementing the partition table given that we don't have hypervisor mode. The MMU caches entry 0 of the process table internally (in pgtbl3) plus the entry indexed by the value in the PID register (pgtbl0). Both caches are invalidated by a tlbie[l] with RIC=2 or by a move to PRTBL. The pgtbl0 cache is invalidated by a move to PID. The dTLB and iTLB are cleared by a move to either PRTBL or PID. Which of the two page table root pointers is used (pgtbl0 or pgtbl3) depends on the MSB of the address being translated. Since the segment checking ensures that address(63) = address(62), this is sufficient to map quadrants 0 and 3. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>		4 years ago
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Makefile	tests: Add a test for the MMU radix page table walks	4 years ago
head.S	tests/mmu: Add a test for dcbz with translation on	4 years ago
mmu.c	MMU: Implement reading of the process table	4 years ago
powerpc.lds	tests: mmu: Add tests for instruction translation	4 years ago