diff options
Diffstat (limited to 'xen/arch/ia64/vhpt.c')
| -rw-r--r-- | xen/arch/ia64/vhpt.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/xen/arch/ia64/vhpt.c b/xen/arch/ia64/vhpt.c index b535f9fc56..86495a8fe8 100644 --- a/xen/arch/ia64/vhpt.c +++ b/xen/arch/ia64/vhpt.c @@ -87,6 +87,37 @@ void vhpt_map(void) ia64_srlz_i(); } +void vhpt_multiple_insert(unsigned long vaddr, unsigned long pte, unsigned long logps) +{ + unsigned long mask = (1L << logps) - 1; + int i; + + if (logps-PAGE_SHIFT > 10) { + // if this happens, we may want to revisit this algorithm + printf("vhpt_multiple_insert:logps-PAGE_SHIFT>10,spinning..\n"); + while(1); + } + if (logps-PAGE_SHIFT > 2) { + // FIXME: Should add counter here to see how often this + // happens (e.g. for 16MB pages!) and determine if it + // is a performance problem. On a quick look, it takes + // about 39000 instrs for a 16MB page and it seems to occur + // only a few times/second, so OK for now. + // An alternate solution would be to just insert the one + // 16KB in the vhpt (but with the full mapping)? + //printf("vhpt_multiple_insert: logps-PAGE_SHIFT==%d," + //"va=%p, pa=%p, pa-masked=%p\n", + //logps-PAGE_SHIFT,vaddr,pte&_PFN_MASK, + //(pte&_PFN_MASK)&~mask); + } + vaddr &= ~mask; + pte = ((pte & _PFN_MASK) & ~mask) | (pte & ~_PFN_MASK); + for (i = 1L << (logps-PAGE_SHIFT); i > 0; i--) { + vhpt_insert(vaddr,pte,logps<<2); + vaddr += PAGE_SIZE; + } +} + void vhpt_init(void) { unsigned long vhpt_total_size, vhpt_alignment, vhpt_imva; |