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      1 /*	$NetBSD: rbus_machdep.c,v 1.7 2017/08/15 09:25:00 maxv Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999
      5  *     HAYAKAWA Koichi.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: rbus_machdep.c,v 1.7 2017/08/15 09:25:00 maxv Exp $");
     30 
     31 #include "opt_pcifixup.h"
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/extent.h>
     36 
     37 #include <sys/sysctl.h>
     38 
     39 #include <sys/bus.h>
     40 #include <dev/cardbus/rbus.h>
     41 
     42 #include <sys/device.h>
     43 #include <dev/isa/isareg.h>
     44 #include <dev/isa/isavar.h>
     45 
     46 #include <dev/pci/pcivar.h>
     47 #if defined(PCI_ADDR_FIXUP)
     48 #include <arch/x86/pci/pci_addr_fixup.h>
     49 #endif
     50 
     51 #ifndef RBUS_IO_BASE
     52 #define	RBUS_IO_BASE	0x4000
     53 #endif
     54 #ifndef RBUS_IO_SIZE
     55 #define	RBUS_IO_SIZE	0x2000
     56 #endif
     57 
     58 #ifndef RBUS_MIN_START
     59 #define RBUS_MIN_START 0x0000000080000000	/* 2GB */
     60 #endif
     61 bus_addr_t rbus_min_start = RBUS_MIN_START;
     62 
     63 /*
     64  * rbus_tag_t rbus_fakeparent_mem(struct pci_attach_args *pa)
     65  *
     66  *   This function makes an rbus tag for memory space.  This rbus tag
     67  *   shares the all memory region of ex_iomem.
     68  */
     69 rbus_tag_t
     70 rbus_pccbb_parent_mem(struct pci_attach_args *pa)
     71 {
     72 	bus_addr_t start;
     73 	bus_size_t size;
     74 	extern struct extent *iomem_ex;
     75 	struct extent *ex = iomem_ex;
     76 
     77 #if defined(PCI_ADDR_FIXUP)
     78 	if (pciaddr.extent_mem != NULL)
     79 		ex = pciaddr.extent_mem;
     80 #endif
     81 
     82 	start = ex->ex_start;
     83 
     84 	/*
     85 	 * XXX: unfortunately, iomem_ex cannot be used for the dynamic
     86 	 * bus_space allocation.  There are some hidden memory (or
     87 	 * some obstacles which are not recognised by the kernel) in
     88 	 * the region governed by iomem_ex.  So I decide to use only
     89 	 * very high address region.
     90 	 *
     91 	 * If pcibios_addr_fixup() succeeded, the PCI device is using an area
     92 	 * which is not recognised by the kernel as already reserved.
     93 	 */
     94 
     95 	if (start < rbus_min_start)
     96 		start = rbus_min_start;
     97 
     98 	size = ex->ex_end - start;
     99 
    100 	return rbus_new_root_share(pa->pa_memt, ex, start, size, 0);
    101 }
    102 
    103 
    104 /*
    105  * rbus_tag_t rbus_pccbb_parent_io(struct pci_attach_args *pa)
    106  */
    107 rbus_tag_t
    108 rbus_pccbb_parent_io(struct pci_attach_args *pa)
    109 {
    110 	bus_addr_t start;
    111 	bus_size_t size;
    112 	rbus_tag_t ret;
    113 	extern struct extent *ioport_ex;
    114 	struct extent *ex = ioport_ex;
    115 
    116 #if defined(PCI_ADDR_FIXUP)
    117 	if (pciaddr.extent_port != NULL)
    118 		ex = pciaddr.extent_port;
    119 #endif
    120 
    121 	start = RBUS_IO_BASE;
    122 	size  = RBUS_IO_SIZE;
    123 
    124 	ret = rbus_new_root_share(pa->pa_iot, ex, start, size, 0);
    125 	if (ret == NULL)
    126 		panic("failed to alloc I/O space");
    127 
    128 	return ret;
    129 }
    130