diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2007-05-04 22:51:13 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2007-05-04 22:51:13 +0000 |
| commit | 8f7b3bb6e138d0654119b2a1d07765ec494ed1c5 (patch) | |
| tree | 4aa05bcc917de6dec8e7c43e78d696ad044fd003 | |
| parent | da1df05449a52dd727456bebad6e5afe8aef7865 (diff) | |
Faster pmap_extract() code for pmap_kernel, from NetBSD.
| -rw-r--r-- | sys/arch/alpha/alpha/pmap.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/sys/arch/alpha/alpha/pmap.c b/sys/arch/alpha/alpha/pmap.c index 71d122e0321..e48e2c41aad 100644 --- a/sys/arch/alpha/alpha/pmap.c +++ b/sys/arch/alpha/alpha/pmap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: pmap.c,v 1.50 2007/04/13 08:31:50 martin Exp $ */ +/* $OpenBSD: pmap.c,v 1.51 2007/05/04 22:51:12 miod Exp $ */ /* $NetBSD: pmap.c,v 1.154 2000/12/07 22:18:55 thorpej Exp $ */ /*- @@ -2147,6 +2147,24 @@ pmap_extract(pmap_t pmap, vaddr_t va, paddr_t *pap) if (pmapdebug & PDB_FOLLOW) printf("pmap_extract(%p, %lx) -> ", pmap, va); #endif + + if (pmap == pmap_kernel()) { + if (va < ALPHA_K0SEG_BASE) { + /* nothing */ + } else if (va <= ALPHA_K0SEG_END) { + pa = ALPHA_K0SEG_TO_PHYS(va); + rv = TRUE; + } else { + l3pte = PMAP_KERNEL_PTE(va); + if (pmap_pte_v(l3pte)) { + pa = pmap_pte_pa(l3pte) | (va & PGOFSET); + *pap = pa; + rv = TRUE; + } + } + goto out_nolock; + } + PMAP_LOCK(pmap); l1pte = pmap_l1pte(pmap, va); @@ -2166,6 +2184,7 @@ pmap_extract(pmap_t pmap, vaddr_t va, paddr_t *pap) rv = TRUE; out: PMAP_UNLOCK(pmap); + out_nolock: #ifdef DEBUG if (pmapdebug & PDB_FOLLOW) { if (rv) |