[src/nathanw_sa]: src/sys/arch/sun2/include Corrected the value of DVMA_OBIO_...

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

details:   https://anonhg.NetBSD.org/src/rev/2801a7de68da
branches:  nathanw_sa
changeset: 504770:2801a7de68da
user:      fredette <fredette%NetBSD.org@localhost>
date:      Thu Jun 14 13:17:05 2001 +0000

description:
Corrected the value of DVMA_OBIO_SLAVE_BASE; obio
devices can see the entire CPU address space.

diffstat:

 sys/arch/sun2/include/dvma.h |  78 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 78 insertions(+), 0 deletions(-)

diffs (82 lines):

diff -r 624de023adcf -r 2801a7de68da sys/arch/sun2/include/dvma.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/sun2/include/dvma.h      Thu Jun 14 13:17:05 2001 +0000
@@ -0,0 +1,78 @@
+/*     $NetBSD: dvma.h,v 1.3.8.2 2001/06/14 13:17:05 fredette Exp $    */
+
+/*-
+ * Copyright (c) 1996 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Gordon W. Ross and Matthew Fredette.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * DVMA (Direct Virtual Memory Access)
+ *
+ * For the unfamiliar, this is just DMA where the device doing DMA
+ * operates in a virtual address space.  The virtual to physical
+ * translations are controlled by the same MMU used bu the CPU.
+ * Usually, the virtual space accessed by DVMA devices is a small
+ * sub-range of the CPU virtual space, and that range is known as 
+ * DVMA space.  
+ */
+
+#include <machine/idprom.h>
+
+/*
+ * Note that while the DVMA harware makes the last 1MB visible
+ * for secondary masters, the PROM "owns" the last page of it.
+ * XXX fredette - is this because of the obio ie SCP?
+ * Also note that OBIO devices can actually see all of
+ * of kernel virtual space.
+ */
+#define DVMA_MAP_BASE          0x00F00000
+#define DVMA_MAP_SIZE_120      0x00040000
+#define DVMA_MAP_SIZE_50       0x000F8000
+#define DVMA_MAP_SIZE          (cpu_machine_id == SUN2_MACH_120 ? DVMA_MAP_SIZE_120 : DVMA_MAP_SIZE_50)
+#define DVMA_MAP_AVAIL         (DVMA_MAP_SIZE-NBPG)
+
+/*
+ * To convert an address in DVMA space to a slave address,
+ * just use a logical AND with one of the following masks.
+ * To convert back, just logical OR with the base address.
+ */
+#define DVMA_OBIO_SLAVE_BASE   0x00000000
+#define DVMA_OBIO_SLAVE_MASK   0x00FFffff      /* 16MB */
+
+#define DVMA_MBMEM_SLAVE_BASE  0x00F00000
+#define DVMA_MBMEM_SLAVE_MASK  0x000Fffff      /*  1MB */
+
+#define DVMA_VME_SLAVE_BASE    0x00F00000
+#define DVMA_VME_SLAVE_MASK    0x000Fffff      /*  1MB */
+