[src/trunk]: src/sys/arch/vax Add routines to copy to/from a user process fro...

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

details:   https://anonhg.NetBSD.org/src/rev/58e3a65281ec
branches:  trunk
changeset: 477584:58e3a65281ec
user:      ragge <ragge%NetBSD.org@localhost>
date:      Fri Oct 22 21:10:12 1999 +0000

description:
Add routines to copy to/from a user process from/to the vsbus DMA area.

diffstat:

 sys/arch/vax/include/vsbus.h |   4 +-
 sys/arch/vax/vsa/vsbus.c     |  72 ++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 66 insertions(+), 10 deletions(-)

diffs (111 lines):

diff -r 91b763b377f0 -r 58e3a65281ec sys/arch/vax/include/vsbus.h
--- a/sys/arch/vax/include/vsbus.h      Fri Oct 22 20:59:08 1999 +0000
+++ b/sys/arch/vax/include/vsbus.h      Fri Oct 22 21:10:12 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vsbus.h,v 1.8 1999/04/14 23:14:46 ragge Exp $ */
+/*     $NetBSD: vsbus.h,v 1.9 1999/10/22 21:10:13 ragge Exp $ */
 /*
  * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
  * All rights reserved.
@@ -72,4 +72,6 @@
 
 u_char vsbus_setmask __P((unsigned char));
 void   vsbus_clrintr __P((unsigned char));
+void   vsbus_copytoproc(struct proc *, caddr_t, caddr_t, int);
+void   vsbus_copyfromproc(struct proc *, caddr_t, caddr_t, int);
 #endif /* _VAX_VSBUS_H_ */
diff -r 91b763b377f0 -r 58e3a65281ec sys/arch/vax/vsa/vsbus.c
--- a/sys/arch/vax/vsa/vsbus.c  Fri Oct 22 20:59:08 1999 +0000
+++ b/sys/arch/vax/vsa/vsbus.c  Fri Oct 22 21:10:12 1999 +0000
@@ -1,6 +1,6 @@
-/*     $NetBSD: vsbus.c,v 1.19 1999/08/27 17:45:57 ragge Exp $ */
+/*     $NetBSD: vsbus.c,v 1.20 1999/10/22 21:10:12 ragge Exp $ */
 /*
- * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
+ * Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden.
  * All rights reserved.
  *
  * This code is derived from software contributed to Ludd by Bertram Barth.
@@ -47,6 +47,8 @@
 #include <sys/syslog.h>
 #include <sys/stat.h>
 
+#include <vm/vm.h>
+
 #define        _VAX_BUS_DMA_PRIVATE
 #include <machine/bus.h>
 #include <machine/pte.h>
@@ -261,14 +263,66 @@
        *sc->sc_intclr = mask;
 }
 
-#ifdef notyet
 /*
- * Allocate/free DMA pages and other bus resources.
- * VS2000: All DMA and register access must be exclusive.
- * VS3100: DMA area may be accessed by anyone anytime.
- *   MFM/SCSI: Don't touch reg's while DMA is active.
- *   SCSI/SCSI: Legal to touch any register anytime.
+ * Copy data from/to a user process' space from the DMA area.
+ * Use the physical memory directly.
  */
+void
+vsbus_copytoproc(p, from, to, len)
+       struct proc *p;
+       caddr_t from, to;
+       int len;
+{
+       struct pte *pte;
+       paddr_t pa;
 
+       pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb));
+       if ((vaddr_t)to & PGOFSET) {
+               int cz = ROUND_PAGE(to) - (vaddr_t)to;
+
+               pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE;
+               bcopy(from, (caddr_t)pa, min(cz, len));
+               from += cz;
+               to += cz;
+               len -= cz;
+               pte += 8; /* XXX */
+       }
+       while (len > 0) {
+               pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
+               bcopy(from, (caddr_t)pa, min(NBPG, len));
+               from += NBPG;
+               to += NBPG;
+               len -= NBPG;
+               pte += 8; /* XXX */
+       }
+}
 
-#endif
+void
+vsbus_copyfromproc(p, from, to, len)
+       struct proc *p;
+       caddr_t from, to;
+       int len;
+{
+       struct pte *pte;
+       paddr_t pa;
+
+       pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb));
+       if ((vaddr_t)from & PGOFSET) {
+               int cz = ROUND_PAGE(from) - (vaddr_t)from;
+
+               pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE;
+               bcopy((caddr_t)pa, to, min(cz, len));
+               from += cz;
+               to += cz;
+               len -= cz;
+               pte += 8; /* XXX */
+       }
+       while (len > 0) {
+               pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
+               bcopy((caddr_t)pa, to, min(NBPG, len));
+               from += NBPG;
+               to += NBPG;
+               len -= NBPG;
+               pte += 8; /* XXX */
+       }
+}