[src/trunk]: src/sys/arch/mips/mips Size the number of initial color bins bas...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9aba8e9e1f9f
branches:  trunk
changeset: 509384:9aba8e9e1f9f
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Wed May 02 21:23:03 2001 +0000

description:
Size the number of initial color bins based on the size and
associativity of the L1 cache.

Note, doesn't really do anything for virtually-indexed caches,
but it doesn't hurt them, either.

diffstat:

 sys/arch/mips/mips/mips_machdep.c |  28 ++++++++++++++++++++++++++--
 1 files changed, 26 insertions(+), 2 deletions(-)

diffs (56 lines):

diff -r 0ece4beb6d1f -r 9aba8e9e1f9f sys/arch/mips/mips/mips_machdep.c
--- a/sys/arch/mips/mips/mips_machdep.c Wed May 02 21:15:19 2001 +0000
+++ b/sys/arch/mips/mips/mips_machdep.c Wed May 02 21:23:03 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mips_machdep.c,v 1.112 2000/12/31 19:06:40 castor Exp $        */
+/*     $NetBSD: mips_machdep.c,v 1.113 2001/05/02 21:23:03 thorpej Exp $       */
 
 /*-
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -52,7 +52,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.112 2000/12/31 19:06:40 castor Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mips_machdep.c,v 1.113 2001/05/02 21:23:03 thorpej Exp $");
 
 #include "opt_compat_netbsd.h"
 #include "opt_compat_ultrix.h"
@@ -466,6 +466,15 @@
                mips1_TBIA(mips_num_tlb_entries);
                mips1_vector_init();
                memcpy(mips_locoresw, mips1_locoresw, sizeof(mips_locoresw));
+               
+               /*
+                * Set the initial number of page colors based on
+                * the L1 cache size.  We can re-size it later when
+                * we find the L2 cache size, if there is one.
+                *
+                * Note that all MIPS1 caches are direct-mapped.
+                */
+               uvmexp.ncolors = atop(mips_L1DCacheSize);
        } else
 #endif
 #ifdef MIPS3
@@ -480,6 +489,21 @@
                }
                mips3_vector_init(mips3_csizebase);
                memcpy(mips_locoresw, mips3_locoresw, sizeof(mips_locoresw));
+
+               /*
+                * Set the initial number of page colors based on
+                * the L1 cache size.  We can re-size it later when
+                * we find the L2 cache size, if there is one.
+                *
+                * Note if we have a 2-way cache, we need 1/2 the
+                * number of colors.
+                *
+                * XXX This is somewhat useless for virtually-indexed
+                * caches, but it doesn't hurt anything.
+                */
+               uvmexp.ncolors = atop(mips_L1DCacheSize);
+               if (mips3_L1TwoWayCache)
+                       uvmexp.ncolors >>= 1;
        } else
 
 #endif