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      1 /*	$NetBSD: loongson_bus_io.c,v 1.2 2012/03/02 13:20:57 nonaka Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Platform-specific PCI bus I/O support for loongson-based systems
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: loongson_bus_io.c,v 1.2 2012/03/02 13:20:57 nonaka Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/malloc.h>
     42 #include <sys/syslog.h>
     43 #include <sys/device.h>
     44 
     45 #include <uvm/uvm_extern.h>
     46 
     47 #include <machine/locore.h>
     48 
     49 #include <mips/bonito/bonitoreg.h>
     50 
     51 #include <sys/bus.h>
     52 
     53 #include <evbmips/loongson/loongson_bus_defs.h>
     54 #include <evbmips/loongson/autoconf.h>
     55 
     56 #define	CHIP			bonito
     57 #define CHIP_IO			/* defined */
     58 
     59 #define	CHIP_EX_MALLOC_SAFE(v)	(ex_mallocsafe)
     60 #define	CHIP_EXTENT(v)		(loongson_io_ex)
     61 
     62 /* IO region 1 */
     63 #define	CHIP_W1_BUS_START(v)	0x00000000UL
     64 #define	CHIP_W1_BUS_END(v)	0x000fffffUL
     65 #define	CHIP_W1_SYS_START(v)	((u_long)BONITO_PCIIO_BASE)
     66 #define	CHIP_W1_SYS_END(v)	((u_long)BONITO_PCIIO_BASE + 0x000fffffUL)
     67 
     68 #include <mips/mips/bus_space_alignstride_chipdep.c>
     69 
     70 int
     71 bonito_bus_io_legacy_map(void *v, bus_addr_t addr, bus_size_t size, int flags,
     72     bus_space_handle_t *hp, int acct)
     73 {
     74 	const struct legacy_io_range *r;
     75 	bus_addr_t rend;
     76 
     77 	if (addr < BONITO_PCIIO_LEGACY) {
     78 		r = sys_platform->legacy_io_ranges;
     79 		if (r == NULL)
     80 			return (ENXIO);
     81 
     82 		rend = addr + size - 1;
     83 		for (; r->start != 0; r++)
     84 			if (addr >= r->start && rend <= r->end)
     85 				break;
     86 		if (r->end == 0)
     87 			return (ENXIO);
     88 	}
     89 	return __BS(map)(v, addr, size, flags, hp, acct);
     90 }
     91