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| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-10 01:12:22 +0100 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 10:12:05 +0100 |
| commit | aa9143b9719c07fb6f1f6207790c9c5086ae07e7 (patch) | |
| tree | 74d56ecc53ed0542f200d6c6257c8f051095111c /arch/sparc64/kernel/tsb.S | |
| parent | [SPARC64]: kernel/cpu.c needs asm/spitfire.h (diff) | |
| download | linux-aa9143b9719c07fb6f1f6207790c9c5086ae07e7.tar.xz linux-aa9143b9719c07fb6f1f6207790c9c5086ae07e7.zip | |
[SPARC64]: Implement sun4v TSB miss handlers.
When we register a TSB with the hypervisor, so that it or hardware can
handle TLB misses and do the TSB walk for us, the hypervisor traps
down to these trap when it incurs a TSB miss.
Processing is simple, we load the missing virtual address and context,
and do a full page table walk.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/tsb.S')
| -rw-r--r-- | arch/sparc64/kernel/tsb.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/tsb.S b/arch/sparc64/kernel/tsb.S index 819a6ef9799f..c848c8847cdc 100644 --- a/arch/sparc64/kernel/tsb.S +++ b/arch/sparc64/kernel/tsb.S @@ -35,8 +35,11 @@ tsb_miss_itlb: nop /* The sun4v TLB miss handlers jump directly here instead - * of tsb_miss_{d,i}tlb with the missing virtual address - * already loaded into %g4. + * of tsb_miss_{d,i}tlb with registers setup as follows: + * + * %g4: missing virtual address + * %g1: TSB entry address loaded + * %g6: TAG TARGET ((vaddr >> 22) | (ctx << 48)) */ tsb_miss_page_table_walk: TRAP_LOAD_PGD_PHYS(%g7, %g5) |