1 /* $NetBSD: rumpdev_bus_space.c,v 1.3 2014/08/22 14:28:58 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 #if defined(RUMP_PCI_IOSPACE) && (defined(__i386__) || defined(__x86_64__)) 38 #define IOSPACE_SUPPORTED 39 #endif 40 41 int 42 bus_space_map(bus_space_tag_t bst, bus_addr_t address, bus_size_t size, 43 int flags, bus_space_handle_t *handlep) 44 { 45 int rv; 46 47 /* 48 * I/O space we just "let it bli" in case someone wants to 49 * map it (e.g. on Xen) 50 * 51 * Memory space needs to be mapped into our guest, so we 52 * make a hypercall to request it. 53 */ 54 if (bst == 0) { 55 #ifdef IOSPACE_SUPPORTED 56 *handlep = address; 57 rv = 0; 58 #else 59 rv = ENOTSUP; 60 #endif 61 } else { 62 *handlep = (bus_space_handle_t)rumpcomp_pci_map(address, size); 63 rv = *handlep ? 0 : EINVAL; 64 } 65 66 return rv; 67 } 68 69 uint8_t 70 bus_space_read_1(bus_space_tag_t bst, bus_space_handle_t bsh, 71 bus_size_t offset) 72 { 73 uint8_t rv; 74 75 if (bst == 0) { 76 #ifdef IOSPACE_SUPPORTED 77 unsigned short addr = bsh + offset; 78 __asm__ __volatile__("inb %1, %0" : "=a"(rv) : "d"(addr)); 79 #else 80 panic("IO space not supported"); 81 #endif 82 } else { 83 rv = *(volatile uint8_t *)(bsh + offset); 84 } 85 86 return rv; 87 } 88 89 uint16_t 90 bus_space_read_2(bus_space_tag_t bst, bus_space_handle_t bsh, 91 bus_size_t offset) 92 { 93 uint16_t rv; 94 95 if (bst == 0) { 96 #ifdef IOSPACE_SUPPORTED 97 unsigned short addr = bsh + offset; 98 __asm__ __volatile__("in %1, %0" : "=a"(rv) : "d"(addr)); 99 #else 100 panic("IO space not supported"); 101 #endif 102 } else { 103 rv = *(volatile uint16_t *)(bsh + offset); 104 } 105 106 return rv; 107 } 108 109 uint32_t 110 bus_space_read_4(bus_space_tag_t bst, bus_space_handle_t bsh, 111 bus_size_t offset) 112 { 113 uint32_t rv; 114 115 if (bst == 0) { 116 #ifdef IOSPACE_SUPPORTED 117 unsigned short addr = bsh + offset; 118 __asm__ __volatile__("inl %1, %0" : "=a"(rv) : "d"(addr)); 119 #else 120 panic("IO space not supported"); 121 #endif 122 } else { 123 rv = *(volatile uint32_t *)(bsh + offset); 124 } 125 126 return rv; 127 } 128 129 void 130 bus_space_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, 131 bus_size_t offset, uint8_t v) 132 { 133 134 if (bst == 0) { 135 #ifdef IOSPACE_SUPPORTED 136 unsigned short addr = bsh + offset; 137 __asm__ __volatile__("outb %0, %1" :: "a"(v), "d"(addr)); 138 #else 139 panic("IO space not supported"); 140 #endif 141 } else { 142 *(volatile uint8_t *)(bsh + offset) = v; 143 } 144 } 145 146 void 147 bus_space_write_2(bus_space_tag_t bst, bus_space_handle_t bsh, 148 bus_size_t offset, uint16_t v) 149 { 150 151 if (bst == 0) { 152 #ifdef IOSPACE_SUPPORTED 153 unsigned short addr = bsh + offset; 154 __asm__ __volatile__("out %0, %1" :: "a"(v), "d"(addr)); 155 #else 156 panic("IO space not supported"); 157 #endif 158 } else { 159 *(volatile uint16_t *)(bsh + offset) = v; 160 } 161 } 162 163 void 164 bus_space_write_4(bus_space_tag_t bst, bus_space_handle_t bsh, 165 bus_size_t offset, uint32_t v) 166 { 167 168 if (bst == 0) { 169 #ifdef IOSPACE_SUPPORTED 170 unsigned short addr = bsh + offset; 171 __asm__ __volatile__("outl %0, %1" :: "a"(v), "d"(addr)); 172 #else 173 panic("IO space not supported"); 174 #endif 175 } else { 176 *(volatile uint32_t *)(bsh + offset) = v; 177 } 178 } 179 180 paddr_t 181 bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t off, 182 int prot, int flags) 183 { 184 185 panic("%s: unimplemented", __func__); 186 } 187 188 int 189 bus_space_subregion(bus_space_tag_t bst, bus_space_handle_t bsh, 190 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep) 191 { 192 193 panic("%s: unimplemented", __func__); 194 } 195 196 void 197 bus_space_unmap(bus_space_tag_t bst, bus_space_handle_t bsh, 198 bus_size_t size) 199 { 200 201 panic("%s: unimplemented", __func__); 202 } 203 204 void 205 bus_space_barrier(bus_space_tag_t bst, bus_space_handle_t bsh, 206 bus_size_t offset, bus_size_t len, int flags) 207 { 208 209 /* weelll ... */ 210 membar_sync(); 211 } 212