1 /* $NetBSD: alpha_pci_io.c,v 1.8 2017/02/20 15:23:43 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Support for x86-style programmed I/O to PCI/EISA/ISA I/O space. This 34 * is currently used to provide such support for XFree86. In a perfect 35 * world, this would go away in favor of a real bus space mapping framework. 36 */ 37 38 #include <sys/param.h> 39 40 #include <machine/alpha_cpu.h> 41 #include <machine/sysarch.h> 42 #include <machine/pio.h> 43 44 #include <err.h> 45 #include <stdlib.h> 46 47 struct alpha_bus_window *alpha_pci_io_windows; 48 int alpha_pci_io_window_count; 49 50 uint8_t alpha_pci_io_swiz_inb(bus_addr_t); 51 uint16_t alpha_pci_io_swiz_inw(bus_addr_t); 52 uint32_t alpha_pci_io_swiz_inl(bus_addr_t); 53 void alpha_pci_io_swiz_outb(bus_addr_t, uint8_t); 54 void alpha_pci_io_swiz_outw(bus_addr_t, uint16_t); 55 void alpha_pci_io_swiz_outl(bus_addr_t, uint32_t); 56 57 const struct alpha_pci_io_ops alpha_pci_io_swiz_ops = { 58 alpha_pci_io_swiz_inb, 59 alpha_pci_io_swiz_inw, 60 alpha_pci_io_swiz_inl, 61 alpha_pci_io_swiz_outb, 62 alpha_pci_io_swiz_outw, 63 alpha_pci_io_swiz_outl, 64 }; 65 66 uint8_t alpha_pci_io_bwx_inb(bus_addr_t); 67 uint16_t alpha_pci_io_bwx_inw(bus_addr_t); 68 uint32_t alpha_pci_io_bwx_inl(bus_addr_t); 69 void alpha_pci_io_bwx_outb(bus_addr_t, uint8_t); 70 void alpha_pci_io_bwx_outw(bus_addr_t, uint16_t); 71 void alpha_pci_io_bwx_outl(bus_addr_t, uint32_t); 72 73 const struct alpha_pci_io_ops alpha_pci_io_bwx_ops = { 74 alpha_pci_io_bwx_inb, 75 alpha_pci_io_bwx_inw, 76 alpha_pci_io_bwx_inl, 77 alpha_pci_io_bwx_outb, 78 alpha_pci_io_bwx_outw, 79 alpha_pci_io_bwx_outl, 80 }; 81 82 const struct alpha_pci_io_ops *alpha_pci_io_switch; 83 84 int 85 alpha_pci_io_enable(int onoff) 86 { 87 struct alpha_bus_window *abw; 88 int i, count; 89 90 if (onoff == 0 && alpha_pci_io_windows != NULL) { 91 for (i = 0; i < alpha_pci_io_window_count; i++) 92 alpha_bus_unmapwindow(&alpha_pci_io_windows[i]); 93 free(alpha_pci_io_windows); 94 alpha_pci_io_windows = NULL; 95 alpha_pci_io_window_count = 0; 96 alpha_pci_io_switch = NULL; 97 return (0); 98 } else if (onoff == 0) 99 return (0); 100 else if (alpha_pci_io_windows != NULL) 101 return (0); 102 103 count = alpha_bus_getwindows(ALPHA_BUS_TYPE_PCI_IO, &abw); 104 if (count <= 0) 105 return (-1); 106 107 for (i = 0; i < count; i++) { 108 if (alpha_bus_mapwindow(&abw[i]) == -1) { 109 free(abw); 110 return (-1); 111 } 112 } 113 114 alpha_pci_io_windows = abw; 115 alpha_pci_io_window_count = count; 116 117 if (abw->abw_abst.abst_flags & ABST_BWX) 118 alpha_pci_io_switch = &alpha_pci_io_bwx_ops; 119 else 120 alpha_pci_io_switch = &alpha_pci_io_swiz_ops; 121 122 return (0); 123 } 124 125 static inline struct alpha_bus_window * 126 alpha_pci_io_findwindow(bus_addr_t ioaddr) 127 { 128 struct alpha_bus_window *abw; 129 int i; 130 131 /* XXX Cache the last hit? */ 132 133 for (i = 0; i < alpha_pci_io_window_count; i++) { 134 abw = &alpha_pci_io_windows[i]; 135 if (ioaddr >= abw->abw_abst.abst_bus_start && 136 ioaddr <= abw->abw_abst.abst_bus_end) 137 return (abw); 138 } 139 140 warnx("alpha_pci_io_findwindow: no window for 0x%lx, ABORTING!", 141 (u_long) ioaddr); 142 abort(); 143 /* NOTREACHED */ 144 } 145 146 static inline uint32_t * 147 alpha_pci_io_swiz(bus_addr_t ioaddr, int size) 148 { 149 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 150 uint32_t *port; 151 152 /* LINTED */ 153 port = (uint32_t *) ((char *)abw->abw_addr + 154 (((ioaddr - abw->abw_abst.abst_bus_start) << 155 abw->abw_abst.abst_addr_shift) | 156 (size << abw->abw_abst.abst_size_shift))); 157 158 return (port); 159 } 160 161 uint8_t 162 alpha_pci_io_swiz_inb(bus_addr_t ioaddr) 163 { 164 uint32_t *port = alpha_pci_io_swiz(ioaddr, 0); 165 bus_addr_t offset = ioaddr & 3; 166 167 alpha_mb(); 168 169 return ((*port >> (8 * offset)) & 0xff); 170 } 171 172 uint16_t 173 alpha_pci_io_swiz_inw(bus_addr_t ioaddr) 174 { 175 uint32_t *port = alpha_pci_io_swiz(ioaddr, 1); 176 bus_addr_t offset = ioaddr & 3; 177 178 alpha_mb(); 179 180 return ((*port >> (8 * offset)) & 0xffff); 181 } 182 183 uint32_t 184 alpha_pci_io_swiz_inl(bus_addr_t ioaddr) 185 { 186 uint32_t *port = alpha_pci_io_swiz(ioaddr, 3); 187 188 alpha_mb(); 189 190 return (*port); 191 } 192 193 void 194 alpha_pci_io_swiz_outb(bus_addr_t ioaddr, uint8_t val) 195 { 196 uint32_t *port = alpha_pci_io_swiz(ioaddr, 0); 197 bus_addr_t offset = ioaddr & 3; 198 uint32_t nval = ((uint32_t)val) << (uint32_t)(8 * offset); 199 200 *port = nval; 201 alpha_mb(); 202 } 203 204 void 205 alpha_pci_io_swiz_outw(bus_addr_t ioaddr, uint16_t val) 206 { 207 uint32_t *port = alpha_pci_io_swiz(ioaddr, 1); 208 bus_addr_t offset = ioaddr & 3; 209 uint32_t nval = ((uint32_t)val) << (uint32_t)(8 * offset); 210 211 *port = nval; 212 alpha_mb(); 213 } 214 215 void 216 alpha_pci_io_swiz_outl(bus_addr_t ioaddr, uint32_t val) 217 { 218 uint32_t *port = alpha_pci_io_swiz(ioaddr, 3); 219 220 *port = val; 221 alpha_mb(); 222 } 223 224 /* 225 * The following functions are used only on EV56 and greater CPUs, 226 * and the assembler requires going to EV56 mode in order to emit 227 * these instructions. 228 */ 229 __asm(".arch ev56"); 230 #include <machine/bwx.h> 231 232 uint8_t 233 alpha_pci_io_bwx_inb(bus_addr_t ioaddr) 234 { 235 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 236 uint8_t *port = (uint8_t *) ((char *)abw->abw_addr + 237 (ioaddr - abw->abw_abst.abst_bus_start)); 238 239 alpha_mb(); 240 241 return (alpha_ldbu(port)); 242 } 243 244 uint16_t 245 alpha_pci_io_bwx_inw(bus_addr_t ioaddr) 246 { 247 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 248 /* LINTED */ 249 uint16_t *port = (uint16_t *) ((char *)abw->abw_addr + 250 (ioaddr - abw->abw_abst.abst_bus_start)); 251 252 alpha_mb(); 253 254 return (alpha_ldwu(port)); 255 } 256 257 uint32_t 258 alpha_pci_io_bwx_inl(bus_addr_t ioaddr) 259 { 260 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 261 /* LINTED */ 262 uint32_t *port = (uint32_t *) ((char *)abw->abw_addr + 263 (ioaddr - abw->abw_abst.abst_bus_start)); 264 265 alpha_mb(); 266 267 return (*port); 268 } 269 270 void 271 alpha_pci_io_bwx_outb(bus_addr_t ioaddr, uint8_t val) 272 { 273 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 274 uint8_t *port = (uint8_t *) ((char *)abw->abw_addr + 275 (ioaddr - abw->abw_abst.abst_bus_start)); 276 277 alpha_stb(port, val); 278 alpha_mb(); 279 } 280 281 void 282 alpha_pci_io_bwx_outw(bus_addr_t ioaddr, uint16_t val) 283 { 284 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 285 /* LINTED */ 286 uint16_t *port = (uint16_t *) ((char *)abw->abw_addr + 287 (ioaddr - abw->abw_abst.abst_bus_start)); 288 289 alpha_stw(port, val); 290 alpha_mb(); 291 } 292 293 void 294 alpha_pci_io_bwx_outl(bus_addr_t ioaddr, uint32_t val) 295 { 296 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 297 /* LINTED */ 298 uint32_t *port = (uint32_t *) ((char *)abw->abw_addr + 299 (ioaddr - abw->abw_abst.abst_bus_start)); 300 301 *port = val; 302 alpha_mb(); 303 } 304
Indexes created Tue Sep 23 07:09:52 GMT 2025