diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-10-23 08:56:05 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-10-23 08:56:05 +0000 |
| commit | a6f67f564831b24c5854f2cf6bbfe80eb2017ead (patch) | |
| tree | 3688306e7da71800c5320f7d71f4f75fa29fcb93 /sys/arch | |
| parent | 33bd1bc5c7a92450194c6be9ea0e5f22e11bf069 (diff) | |
4/300 cache really is write through but has a slight bug.
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/sparc/sparc/cpu.c | 1 | ||||
| -rw-r--r-- | sys/arch/sparc/sparc/pmap.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/sys/arch/sparc/sparc/cpu.c b/sys/arch/sparc/sparc/cpu.c index a445aff07c3..43437db234b 100644 --- a/sys/arch/sparc/sparc/cpu.c +++ b/sys/arch/sparc/sparc/cpu.c @@ -188,6 +188,7 @@ cpu_attach(parent, dev, aux) case SUN4_300: sprintf(cpu_model, "SUN-4/300 series (%s FPU)", fpuname); bug = 1; + vactype = VAC_WRITETHROUGH; cacheinfo.c_totalsize = 128*1024; cacheinfo.c_hwflush = 0; cacheinfo.c_linesize = 16; diff --git a/sys/arch/sparc/sparc/pmap.c b/sys/arch/sparc/sparc/pmap.c index 5fdda8300ac..38c717eb532 100644 --- a/sys/arch/sparc/sparc/pmap.c +++ b/sys/arch/sparc/sparc/pmap.c @@ -2862,7 +2862,8 @@ pmap_changeprot(pm, va, prot, wired) * the latter check deals with a writethrough cache * problem on the 4/300 */ - if (vactype == VAC_WRITEBACK && + if ((vactype==VAC_WRITEBACK || + (vactype==VAC_WRITETHROUGH && cputyp==CPU_SUN4)) && (tpte & (PG_U|PG_NC|PG_TYPE)) == (PG_U|PG_OBMEM)) cache_flush_page((int)va); } else { |