1 /* $NetBSD: rumpdev_bus_space.c,v 1.2 2014/04/13 15:43:26 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/atomic.h> 30 31 #include <sys/param.h> 32 33 #include <dev/pci/pcivar.h> 34 35 #include "pci_user.h" 36 37 int 38 bus_space_map(bus_space_tag_t bst, bus_addr_t address, bus_size_t size, 39 int flags, bus_space_handle_t *handlep) 40 { 41 int rv; 42 43 /* 44 * I/O space we just "let it bli" in case someone wants to 45 * map it (e.g. on Xen) 46 * 47 * Memory space needs to be mapped into our guest, so we 48 * make a hypercall to request it. 49 */ 50 if (bst == 0) { 51 *handlep = address; 52 rv = 0; 53 } else { 54 *handlep = (bus_space_handle_t)rumpcomp_pci_map(address, size); 55 rv = *handlep ? 0 : EINVAL; 56 } 57 58 return rv; 59 } 60 61 uint8_t 62 bus_space_read_1(bus_space_tag_t bst, bus_space_handle_t bsh, 63 bus_size_t offset) 64 { 65 uint8_t rv; 66 67 if (bst == 0) { 68 panic("8bit IO space not supported"); 69 } else { 70 rv = *(volatile uint8_t *)(bsh + offset); 71 } 72 73 return rv; 74 } 75 76 uint16_t 77 bus_space_read_2(bus_space_tag_t bst, bus_space_handle_t bsh, 78 bus_size_t offset) 79 { 80 uint16_t rv; 81 82 if (bst == 0) { 83 panic("16bit IO space not supported"); 84 } else { 85 rv = *(volatile uint16_t *)(bsh + offset); 86 } 87 88 return rv; 89 } 90 91 uint32_t 92 bus_space_read_4(bus_space_tag_t bst, bus_space_handle_t bsh, 93 bus_size_t offset) 94 { 95 uint32_t rv; 96 97 if (bst == 0) { 98 #if 1 99 panic("IO space not supported in this build"); 100 #else 101 unsigned short addr = bsh + offset; 102 __asm__ __volatile__("inl %1, %0" : "=a"(rv) : "d"(addr)); 103 #endif 104 } else { 105 rv = *(volatile uint32_t *)(bsh + offset); 106 } 107 108 return rv; 109 } 110 111 void 112 bus_space_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, 113 bus_size_t offset, uint8_t v) 114 { 115 116 if (bst == 0) { 117 #if 1 118 panic("IO space not supported in this build"); 119 #endif 120 } else { 121 *(volatile uint8_t *)(bsh + offset) = v; 122 } 123 } 124 125 void 126 bus_space_write_2(bus_space_tag_t bst, bus_space_handle_t bsh, 127 bus_size_t offset, uint16_t v) 128 { 129 130 if (bst == 0) { 131 #if 1 132 panic("IO space not supported in this build"); 133 #endif 134 } else { 135 *(volatile uint16_t *)(bsh + offset) = v; 136 } 137 } 138 139 void 140 bus_space_write_4(bus_space_tag_t bst, bus_space_handle_t bsh, 141 bus_size_t offset, uint32_t v) 142 { 143 144 if (bst == 0) { 145 #if 1 146 panic("IO space not supported in this build"); 147 #else 148 unsigned short addr = bsh + offset; 149 __asm__ __volatile__("outl %0, %1" :: "a"(v), "d"(addr)); 150 #endif 151 } else { 152 *(volatile uint32_t *)(bsh + offset) = v; 153 } 154 } 155 156 paddr_t 157 bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t off, 158 int prot, int flags) 159 { 160 161 panic("%s: unimplemented", __func__); 162 } 163 164 int 165 bus_space_subregion(bus_space_tag_t bst, bus_space_handle_t bsh, 166 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep) 167 { 168 169 panic("%s: unimplemented", __func__); 170 } 171 172 void 173 bus_space_unmap(bus_space_tag_t bst, bus_space_handle_t bsh, 174 bus_size_t size) 175 { 176 177 panic("%s: unimplemented", __func__); 178 } 179 180 void 181 bus_space_barrier(bus_space_tag_t bst, bus_space_handle_t bsh, 182 bus_size_t offset, bus_size_t len, int flags) 183 { 184 185 /* weelll ... */ 186 membar_sync(); 187 } 188