bus.h from NetBSD, does not implement OpenBSD extensions yet.

1 files changed, 173 insertions, 0 deletions

diff --git a/sys/arch/pmax/include/bus.h b/sys/arch/pmax/include/bus.h
new file mode 100644
index 00000000000..a09dc9ac9a1
--- /dev/null
+++ b/sys/arch/pmax/include/bus.h
@@ -0,0 +1,173 @@
+/*	$OpenBSD: bus.h,v 1.1 1998/05/17 23:07:46 millert Exp $	*/
+/*	$NetBSD: bus.h,v 1.4 1997/11/28 00:33:53 jonathan Exp $	*/
+
+/*
+ * Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author)
+ * All rights reserved.
+ *
+ * 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 Jonathan Stone for
+ *      the NetBSD Project.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+
+/*
+ * OpenBSD machine-indepedent bus accessor macros/functions for Decstations.
+ */
+#ifndef _PMAX_BUS_H_
+#define _PMAX_BUS_H_
+
+#include <pmax/locore.h>			/* wbflush() */
+
+
+/*
+ * Bus address and size types
+ */
+typedef u_long bus_addr_t;
+typedef u_long bus_size_t;
+
+/*
+ * Access types for bus resources and addresses.
+ */
+typedef int bus_space_tag_t;
+typedef u_long bus_space_handle_t;
+
+
+/*
+ * Read or write a 1, 2, or 4-byte quantity from/to a bus-space
+ * address, as defined by (space-tag,  handle, offset
+ */
+#define bus_space_read_1(t, h, o) \
+	(*(volatile u_int8_t *)((h) + (o)))
+
+#define bus_space_read_2(t, h, o) \
+	(*(volatile u_int16_t *)((h) + (o)))
+
+#define bus_space_read_4(t, h, o) \
+	(*(volatile u_int32_t *)((h) + (o)))
+
+#define bus_space_write_1(t, h, o, v) \
+	do { ((void)(*(volatile u_int8_t *)((h) + (o)) = (v))); } while (0)
+
+#define bus_space_write_2(t, h, o, v) \
+	do { ((void)(*(volatile u_int16_t *)((h) + (o)) = (v))); } while (0)
+
+#define bus_space_write_4(t, h, o, v) \
+	do { ((void)(*(volatile u_int32_t *)((h) + (o)) = (v))); } while (0)
+
+/*
+ * Read `count'  1, 2, or 4-byte quantities from bus-space
+ * address, defined by (space-tag,  handle, offset).
+ * Copy to the specified buffer address.
+ */
+#define	bus_space_read_multi_1(t, h, o, a, c) \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  ((u_char *)(a))[__i] = bus_space_read_1(t, h, o);		\
+    } while (0)
+
+
+#define	bus_space_read_multi_2(t, h, o, a, c) \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  ((u_int16t_t *)(a))[__i] = bus_space_read_2(t, h, o);		\
+    } while (0)
+
+#define	bus_space_read_multi_4(t, h, o, a, c) \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  ((u_int32_t *)(a))[__i] = bus_space_read_4(t, h, o);		\
+    } while (0)
+
+/*
+ * Write `count'  1, 2, or 4-byte quantities to a bus-space
+ * address, defined by (space-tag,  handle, offset).
+ * Copy from the specified buffer address.
+ */
+#define	bus_space_write_multi_1(t, h, o, a, c)  \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  bus_space_write_1(t, h, o, ((u_char *)(a))[__i]);		\
+    } while (0)
+
+#define	bus_space_write_multi_2(t, h, o, a, c)  \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  bus_space_write_2(t, h, o, ((u_int16_t *)(a))[__i]);		\
+    } while (0)
+
+#define	bus_space_write_multi_4(t, h, o, a, c)  \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  bus_space_write_4(t, h, o, ((u_int32_t *)(a))[__i]);		\
+    } while (0)
+
+/*
+ * Copy `count' 1, 2, or 4-byte values from one bus-space address
+ * (t,  h, o triple) to another.
+ */
+#define	bus_space_copy_multi_1(t, h1, h2, o1, o2, c) \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  bus_space_write_1(t, h1, o1, bus_space_read_1(t, h2, o2));	\
+    } while (0)
+
+#define	bus_space_copy_multi_2(t, h1, h2, o1, o2, c) \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  bus_space_write_2(t, h1, o1, bus_space_read_2(t, h2, o2));	\
+    while (0)
+
+#define	bus_space_copy_multi_4(t,  h1, h2, o1, o2, c) \
+    do {								\
+    	register int __i ;						\
+	for (__i = 0; i < (c); i++)					\
+	  bus_space_write_4(t, h1, o1, bus_space_read_4(t, h2, o2));	\
+    } while (0)
+
+
+/*
+ * Bus-space barriers.
+ * Since DECstation DMA is non-cache-coherent, we have to handle
+ * consistency in software anyway (e.g., via bus -DMA, or by ensuring
+ * that DMA buffers are referenced via  uncached address space.
+ * For now, simply do CPU writebuffer flushes and export the flags
+ * to  MI code.
+ */
+#define bus_space_barrier(t, h, o, l, f)	wbflush()
+
+#define BUS_BARRIER_READ 	0x01
+#define BUS_BARRIER_WRITE	0x02
+
+#endif /* _PMAX_BUS_H_ */