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Fix to make vfork work on machines with separated PCB/mtpr PTE registers.

This commit is contained in:
ragge 1998-01-27 17:35:03 +00:00
parent 226c774dba
commit fe52d237fd
1 changed files with 13 additions and 4 deletions
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17
sys/arch/vax/vax/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.43 1998/01/18 22:07:52 ragge Exp $ */
/* $NetBSD: pmap.c,v 1.44 1998/01/27 17:35:03 ragge Exp $ */
/*
* Copyright (c) 1994 Ludd, University of Lule}, Sweden.
* All rights reserved.
@ -710,9 +710,10 @@ if(startpmapdebug) printf("pmap_page_protect: pa %x, prot %x\n",pa, prot);
}
/*
* Activate the address space for the specified process. Note that we
* only need to load the process's PCB, since the page base/length registers
* will be implicitly restored on the way back out to user space.
* Activate the address space for the specified process.
* Note that if the process to activate is the current process, then
* the processor internal registers must also be loaded; otherwise
* the current process will have wrong pagetables.
*/
void
pmap_activate(p)
@ -725,6 +726,14 @@ pmap_activate(p)
pcb->P0LR = pmap->pm_p0lr;
pcb->P1BR = pmap->pm_p1br;
pcb->P1LR = pmap->pm_p1lr;
if (p == curproc) {
mtpr(pmap->pm_p0br, PR_P0BR);
mtpr(pmap->pm_p0lr, PR_P0LR);
mtpr(pmap->pm_p1br, PR_P1BR);
mtpr(pmap->pm_p1lr, PR_P1LR);
}
mtpr(0, PR_TBIA);
}
/*