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Use the last available page(s) for msgbuf.

This commit is contained in:
tsubai 1999-01-12 10:26:18 +00:00
parent 48ff43e0e2
commit 4293e4ff3c
1 changed files with 10 additions and 9 deletions
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19
sys/arch/powerpc/powerpc/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.11 1999/01/10 10:24:17 tsubai Exp $ */
/* $NetBSD: pmap.c,v 1.12 1999/01/12 10:26:18 tsubai Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -67,7 +67,7 @@ struct pmap kernel_pmap_;
int physmem;
static int npgs;
static u_int nextavail;
#ifdef __NO_FIXED_MSGBUF
#ifndef MSGBUFADDR
extern paddr_t msgbuf_paddr;
#endif
@ -434,6 +434,7 @@ pmap_bootstrap(kernelstart, kernelend)
bcopy(mp, mp + 1,
(cnt - (mp - avail)) * sizeof *mp);
mp++->size = s;
cnt++;
}
mp->start += s + HTABSIZE;
mp->size -= s + HTABSIZE;
@ -468,21 +469,21 @@ pmap_bootstrap(kernelstart, kernelend)
LIST_INIT(potable + i);
LIST_INIT(&pv_page_freelist);
#ifdef __NO_FIXED_MSGBUF
#ifndef MSGBUFADDR
/*
* allow for msgbuf
*/
sz = round_page(MSGBUFSIZE);
for (mp = avail; mp->size; mp++)
if (mp->size >= sz)
break;
if (!mp->size)
mp = NULL;
for (mp1 = avail; mp1->size; mp1++)
if (mp1->size >= sz)
mp = mp1;
if (mp == NULL)
panic("not enough memory?");
npgs -= btoc(sz);
msgbuf_paddr = mp->start;
msgbuf_paddr = mp->start + mp->size - sz;
mp->size -= sz;
mp->start += sz;
if (mp->size <= 0)
bcopy(mp + 1, mp, (cnt - (mp - avail)) * sizeof *mp);
#endif