| Age | Commit message (Collapse) | Author | |
|---|---|---|---|
| 2005-09-25 | [SPARC64]: Add CONFIG_DEBUG_PAGEALLOC support. | David S. Miller | |
| The trick is that we do the kernel linear mapping TLB miss starting with an instruction sequence like this: ba,pt %xcc, kvmap_load xor %g2, %g4, %g5 succeeded by an instruction sequence which performs a full page table walk starting at swapper_pg_dir. We first take over the trap table from the firmware. Then, using this constant PTE generation for the linear mapping area above, we build the kernel page tables for the linear mapping. After this is setup, we patch that branch above into a "nop", which will cause TLB misses to fall through to the full page table walk. With this, the page unmapping for CONFIG_DEBUG_PAGEALLOC is trivial. Signed-off-by: David S. Miller <davem@davemloft.net> | |||
| 2005-09-22 | [SPARC64]: Remove ktlb.S instruction patching. | David S. Miller | |
| This was kind of ugly, and actually buggy. The bug was that we didn't handle a machine with memory starting > 4GB. If the 'prompmd' was allocated in physical memory > 4GB we'd croak because the obp_iaddr_patch and obp_daddr_patch things only supported a 32-bit physical address. So fix this by just loading the appropriate values from two variables in the kernel image, which is locked into the TLB and thus accesses to them can't cause a recursive TLB miss. Signed-off-by: David S. Miller <davem@davemloft.net> | |||
| 2005-09-22 | [SPARC64]: Move kernel TLB miss handling into a seperate file. | David S. Miller | |
| Signed-off-by: David S. Miller <davem@davemloft.net> | |||
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