[src/trunk]: src/sys/arch/powerpc/powerpc Preliminary AltiVec support

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

details:   https://anonhg.NetBSD.org/src/rev/366edf536527
branches:  trunk
changeset: 499631:366edf536527
user:      matt <matt%NetBSD.org@localhost>
date:      Sat Nov 25 03:00:48 2000 +0000

description:
Preliminary AltiVec support

diffstat:

 sys/arch/powerpc/powerpc/trap.c |  21 ++++++++++++++++++---
 1 files changed, 18 insertions(+), 3 deletions(-)

diffs (59 lines):

diff -r 95816a1682f1 -r 366edf536527 sys/arch/powerpc/powerpc/trap.c
--- a/sys/arch/powerpc/powerpc/trap.c   Sat Nov 25 02:59:34 2000 +0000
+++ b/sys/arch/powerpc/powerpc/trap.c   Sat Nov 25 03:00:48 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: trap.c,v 1.30 2000/11/24 21:49:06 tsubai Exp $ */
+/*     $NetBSD: trap.c,v 1.31 2000/11/25 03:00:48 matt Exp $   */
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -33,6 +33,7 @@
 
 #include "opt_ddb.h"
 #include "opt_ktrace.h"
+#include "opt_altivec.h"
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -256,6 +257,15 @@
                enable_fpu(p);
                break;
 
+#ifdef ALTIVEC
+       case EXC_VEC|EXC_USER:
+               if (vecproc)
+                       save_vec(vecproc);
+               vecproc = p;
+               enable_vec(p);
+               break;
+#endif
+
        case EXC_AST|EXC_USER:
                /* This is just here that we trap */
                break;
@@ -343,10 +353,15 @@
                            (int)(p->p_sticks - sticks) * psratio);
        }
        /*
-        * If someone stole the fpu while we were away, disable it
+        * If someone stole the fp or vector unit while we were away,
+        * disable it
         */
        if (p != fpuproc)
                frame->srr1 &= ~PSL_FP;
+#ifdef ALTIVEC
+       if (p != vecproc)
+               frame->srr1 &= ~PSL_VEC;
+#endif
        curcpu()->ci_schedstate.spc_curpriority = p->p_priority;
 }
 
@@ -360,7 +375,7 @@
        tf->fixreg[FIRSTARG] = 0;
        tf->fixreg[FIRSTARG + 1] = 1;
        tf->cr &= ~0x10000000;
-       tf->srr1 &= ~PSL_FP;    /* Disable FPU, as we can't be fpuproc */
+       tf->srr1 &= ~(PSL_FP|PSL_VEC);  /* Disable FP & AltiVec, as we can't be them */
 #ifdef KTRACE
        if (KTRPOINT(p, KTR_SYSRET))
                ktrsysret(p, SYS_fork, 0, 0);