NetBSD/sys/arch/pmax/include/bus.h

210 lines
6.7 KiB
C

/* $NetBSD: bus.h,v 1.2 1997/06/16 04:22:15 jonathan Exp $ */
/*
* Copyright Notice:
*
* Copyright (c) 1995, 1996, 1997
* Jonathan R. Stone. All rights reserved.
*
* License:
*
* This License applies to this software ("Software"), created
* by Jonathan Stone ("Author").
*
* You may use, copy, modify and redistribute this Software without
* charge, in either source code form, binary form, or both, on the
* following conditions:
*
* 1. (a) Binary code: (i) a complete copy of the above copyright notice
* must be included within each copy of the Software in binary code form,
* and (ii) a complete copy of the above copyright notice and all terms
* of this License as presented here must be included within each copy of
* all documentation accompanying or associated with binary code, in any
* medium, along with a list of the software modules to which the license
* applies.
*
* (b) Source Code: A complete copy of the above copyright notice and all
* terms of this License as presented here must be included within: (i)
* each copy of the Software in source code form, and (ii) each copy of
* all accompanying or associated documentation, in any medium.
*
* 2. The following Acknowledgment must be used in communications
* involving the Software as described below:
*
* This product includes software developed by
* Jonathan Stone for the NetBSD Project.
*
* The Acknowledgment must be conspicuously and completely displayed
* whenever the Software, or any software, products or systems containing
* the Software, are mentioned in advertising, marketing, informational
* or publicity materials of any kind, whether in print, electronic or
* other media (except for information provided to support use of
* products containing the Software by existing users or customers).
*
* 3. The name of the Author may not be used to endorse or promote
* products derived from this Software without specific prior written
* permission (conditions (1) and (2) above are not considered
* endorsement or promotion).
*
* 4. This license applies to: (a) all copies of the Software, whether
* partial or whole, original or modified, and (b) your actions, and the
* actions of all those who may act on your behalf. All uses not
* expressly permitted are reserved to the Author.
*
* 5. Disclaimer. THIS SOFTWARE IS MADE AVAILABLE BY THE AUTHOR TO THE
* PUBLIC FOR FREE AND "AS IS.'' ALL USERS OF THIS FREE SOFTWARE ARE
* SOLELY AND ENTIRELY RESPONSIBLE FOR THEIR OWN CHOICE AND USE OF THIS
* SOFTWARE FOR THEIR OWN PURPOSES. BY USING THIS SOFTWARE, EACH USER
* AGREES THAT THE AUTHOR SHALL NOT BE LIABLE FOR DAMAGES OF ANY KIND IN
* RELATION TO ITS USE OR PERFORMANCE.
*
* 6. If you have a special need for a change in one or more of these
* license conditions, please contact the Author via electronic mail to
*
* jonathan@NetBSD.ORG
*
* or via the contact information on
*
* http://www.NetBSD.ORG/People/Pages/jonathan.html
*/
/*
* NetBSD machine-indepedent bus accessor macros/functions for Decstations.
*/
#ifndef _PMAX_BUS_H_
#define _PMAX_BUS_H_
#include <mips/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) \
((void) wbflush();
#define BUS_BARRIER_READ 0x01
#define BUS_BARRIER_WRITE 0x02
#endif /* _PMAX_BUS_H_ */