1 /* $NetBSD: rbus_machdep.c,v 1.14 2001/11/15 07:03:31 lukem 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by HAYAKAWA Koichi. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: rbus_machdep.c,v 1.14 2001/11/15 07:03:31 lukem Exp $"); 35 36 #include "opt_pcibios.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/extent.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <sys/sysctl.h> 45 46 #include <machine/bus.h> 47 #include <dev/cardbus/rbus.h> 48 49 #include <sys/device.h> 50 #include <dev/isa/isareg.h> 51 #include <dev/isa/isavar.h> 52 53 #include <dev/pci/pcivar.h> 54 #ifdef PCIBIOS_ADDR_FIXUP 55 #include <arch/i386/pci/pci_addr_fixup.h> 56 #endif 57 58 #ifndef RBUS_IO_BASE 59 #define RBUS_IO_BASE 0x4000 60 #endif 61 #ifndef RBUS_IO_SIZE 62 #define RBUS_IO_SIZE 0x2000 63 #endif 64 65 #ifndef RBUS_MIN_START 66 #define RBUS_MIN_START 0x40000000 /* 1GB */ 67 #endif 68 bus_addr_t rbus_min_start = RBUS_MIN_START; 69 70 /* 71 * rbus_tag_t rbus_fakeparent_mem(struct pci_attach_args *pa) 72 * 73 * This function makes an rbus tag for memory space. This rbus tag 74 * shares the all memory region of ex_iomem. 75 */ 76 rbus_tag_t 77 rbus_pccbb_parent_mem(pa) 78 struct pci_attach_args *pa; 79 { 80 bus_addr_t start, offset; 81 bus_size_t size; 82 struct extent *ex; 83 #ifdef PCIBIOS_ADDR_FIXUP 84 ex = pciaddr.extent_mem; 85 #else 86 extern struct extent *iomem_ex; 87 ex = iomem_ex; 88 #endif 89 90 start = ex->ex_start; 91 92 /* 93 * XXX: unfortunately, iomem_ex cannot be used for the dynamic 94 * bus_space allocatoin. There are some hidden memory (or 95 * some obstacles which do not recognised by the kernel) in 96 * the region governed by iomem_ex. So I decide to use only 97 * very high address region. 98 * 99 * if defined PCIBIOS_ADDR_FIXUP, PCI device using area 100 * which do not recognised by the kernel are already reserved. 101 */ 102 103 if (start < rbus_min_start) 104 start = rbus_min_start; 105 106 size = ex->ex_end - start; 107 offset = 0; 108 109 return rbus_new_root_share(pa->pa_memt, ex, start, size, 0); 110 } 111 112 113 /* 114 * rbus_tag_t rbus_pccbb_parent_io(struct pci_attach_args *pa) 115 */ 116 rbus_tag_t 117 rbus_pccbb_parent_io(pa) 118 struct pci_attach_args *pa; 119 { 120 struct extent *ex; 121 bus_addr_t start; 122 bus_size_t size; 123 rbus_tag_t ret; 124 #ifdef PCIBIOS_ADDR_FIXUP 125 ex = pciaddr.extent_port; 126 #else 127 extern struct extent *ioport_ex; 128 ex = ioport_ex; 129 #endif 130 start = RBUS_IO_BASE; 131 size = RBUS_IO_SIZE; 132 133 ret = rbus_new_root_share(pa->pa_iot, ex, start, size, 0); 134 if(ret == NULL) { 135 panic("failed to alloc I/O space"); 136 } 137 return ret; 138 } 139