| 1 | /* $NetBSD: rbus_machdep.c,v 1.6 2014/06/29 23:21:28 jakllsch 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 1.6 2014/06/29 23:21:28 jakllsch 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 | |