diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2007-11-24 11:13:57 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2007-11-24 11:13:57 +0000 |
| commit | 3d988f7694a760da57147f55faa77d3ef494fe18 (patch) | |
| tree | 6360cbf1faeedc9e7552d4b8d6f0eae42a9545e6 /sys/arch/m88k | |
| parent | fc8f5d963cbfbce1bd21dcd873cad6b8ddb17815 (diff) | |
Do not mark any page as global on monoprocessor kernels if running on a
88110, to avoid snooping notification bus cycles, as recommended by the
manual.
Diffstat (limited to 'sys/arch/m88k')
| -rw-r--r-- | sys/arch/m88k/m88k/pmap.c | 10 | ||||
| -rw-r--r-- | sys/arch/m88k/m88k/vm_machdep.c | 10 |
2 files changed, 17 insertions, 3 deletions
diff --git a/sys/arch/m88k/m88k/pmap.c b/sys/arch/m88k/m88k/pmap.c index 4630714243c..9b2fd26d6f2 100644 --- a/sys/arch/m88k/m88k/pmap.c +++ b/sys/arch/m88k/m88k/pmap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: pmap.c,v 1.39 2007/11/22 05:47:46 miod Exp $ */ +/* $OpenBSD: pmap.c,v 1.40 2007/11/24 11:13:56 miod Exp $ */ /* * Copyright (c) 2001-2004, Miodrag Vallat * Copyright (c) 1998-2001 Steve Murphree, Jr. @@ -714,6 +714,10 @@ pmap_bootstrap(vaddr_t load_start) kernel_pmap->pm_apr = (atop((paddr_t)kmap) << PG_SHIFT) | CACHE_GLOBAL | CACHE_WT | APR_V; +#if !defined(MULTIPROCESSOR) && defined(M88110) + if (CPU_IS88110) + kernel_pmap->pm_apr &= ~CACHE_GLOBAL; +#endif pmap_bootstrap_cpu(cpu_number()); } @@ -854,6 +858,10 @@ pmap_create(void) (paddr_t *)&stpa) == FALSE) panic("pmap_create: pmap_extract failed!"); pmap->pm_apr = (atop(stpa) << PG_SHIFT) | CACHE_GLOBAL | APR_V; +#if !defined(MULTIPROCESSOR) && defined(M88110) + if (CPU_IS88110) + pmap->pm_apr &= ~CACHE_GLOBAL; +#endif #ifdef PMAPDEBUG if (pmap_debug & CD_CREAT) diff --git a/sys/arch/m88k/m88k/vm_machdep.c b/sys/arch/m88k/m88k/vm_machdep.c index 189067e730e..27f24bebf32 100644 --- a/sys/arch/m88k/m88k/vm_machdep.c +++ b/sys/arch/m88k/m88k/vm_machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vm_machdep.c,v 1.19 2007/11/22 05:46:38 miod Exp $ */ +/* $OpenBSD: vm_machdep.c,v 1.20 2007/11/24 11:13:56 miod Exp $ */ /* * Copyright (c) 1998 Steve Murphree, Jr. @@ -211,8 +211,14 @@ vmapbuf(bp, len) addr += PAGE_SIZE; kva += PAGE_SIZE; } + /* make sure snooping will be possible... */ - pmap_cache_ctrl(pmap_kernel(), ova, ova + len, CACHE_GLOBAL); +#if !defined(MULTIPROCESSOR) && defined(M88110) + if (CPU_IS88110) + pmap_cache_ctrl(pmap_kernel(), ova, ova + len, 0); + else +#endif + pmap_cache_ctrl(pmap_kernel(), ova, ova + len, CACHE_GLOBAL); pmap_update(pmap_kernel()); } |