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      1 /*	$NetBSD: bus_space.c,v 1.2 2019/12/15 16:48:26 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
      9  * Simulation Facility, NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.2 2019/12/15 16:48:26 tsutsui Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 
     39 #include <machine/bus.h>
     40 
     41 
     42 int
     43 ia64_bus_space_map(bus_space_tag_t t, bus_addr_t addr,
     44     bus_size_t size, int flags, bus_space_handle_t *bshp)
     45 {
     46 	if (t == IA64_BUS_SPACE_IO) {
     47 		if (addr > 0xffff)
     48 			return 1;
     49 		*bshp = addr;
     50 	} else {
     51 		/* t == IA64_BUS_SPACE_MEM */
     52 
     53 		if (flags & BUS_SPACE_MAP_CACHEABLE)
     54 			*bshp = addr + IA64_RR_BASE(7);
     55 		else
     56 			*bshp = addr + IA64_RR_BASE(6);
     57 	}
     58 
     59 	return 0;
     60 }
     61 
     62 void
     63 ia64_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
     64     bus_size_t size)
     65 {
     66 	/* nop */
     67 }
     68 
     69 int
     70 ia64_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
     71     bus_size_t offset, bus_size_t size, bus_space_handle_t *bshp)
     72 {
     73 	*bshp = bsh + offset;
     74 	return 0;
     75 }
     76 
     77 paddr_t
     78 ia64_bus_space_mmap(bus_space_tag_t t, bus_addr_t addr, off_t offset,
     79     int prot, int flags)
     80 {
     81 	/* Can't mmap I/O space */
     82 	if (t == IA64_BUS_SPACE_IO)
     83 		return -1;
     84 
     85 	return addr + offset;
     86 }
     87 
     88 int
     89 ia64_bus_space_alloc(bus_space_tag_t t, bus_addr_t reg_start,
     90     bus_addr_t reg_end, bus_size_t size, bus_size_t alignment,
     91     bus_size_t boundary, int flags, bus_addr_t *addrp, bus_space_handle_t *bshp)
     92 {
     93 	bus_addr_t addr;
     94 
     95 	addr = (reg_start + PAGE_SIZE - 1) & ~PAGE_MASK;
     96 
     97 	if ((addr % alignment) == 0) {
     98 		*addrp = addr;
     99 		*bshp = (bus_space_handle_t)addr;
    100 		return 0;
    101 	} else {
    102 		return 1;
    103 	}
    104 }
    105 
    106 void
    107 ia64_bus_space_free(bus_space_tag_t t, bus_space_handle_t handle,
    108     bus_size_t size)
    109 {
    110 	/* nop */
    111 }
    112