alpha_pci_io.c revision 1.6.2.1
1 /* $NetBSD: alpha_pci_io.c,v 1.6.2.1 2013/02/25 00:27:48 tls 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/bwx.h> 42 #include <machine/sysarch.h> 43 #include <machine/pio.h> 44 45 #include <err.h> 46 #include <stdlib.h> 47 48 struct alpha_bus_window *alpha_pci_io_windows; 49 int alpha_pci_io_window_count; 50 51 uint8_t alpha_pci_io_swiz_inb(bus_addr_t); 52 uint16_t alpha_pci_io_swiz_inw(bus_addr_t); 53 uint32_t alpha_pci_io_swiz_inl(bus_addr_t); 54 void alpha_pci_io_swiz_outb(bus_addr_t, uint8_t); 55 void alpha_pci_io_swiz_outw(bus_addr_t, uint16_t); 56 void alpha_pci_io_swiz_outl(bus_addr_t, uint32_t); 57 58 const struct alpha_pci_io_ops alpha_pci_io_swiz_ops = { 59 alpha_pci_io_swiz_inb, 60 alpha_pci_io_swiz_inw, 61 alpha_pci_io_swiz_inl, 62 alpha_pci_io_swiz_outb, 63 alpha_pci_io_swiz_outw, 64 alpha_pci_io_swiz_outl, 65 }; 66 67 uint8_t alpha_pci_io_bwx_inb(bus_addr_t); 68 uint16_t alpha_pci_io_bwx_inw(bus_addr_t); 69 uint32_t alpha_pci_io_bwx_inl(bus_addr_t); 70 void alpha_pci_io_bwx_outb(bus_addr_t, uint8_t); 71 void alpha_pci_io_bwx_outw(bus_addr_t, uint16_t); 72 void alpha_pci_io_bwx_outl(bus_addr_t, uint32_t); 73 74 const struct alpha_pci_io_ops alpha_pci_io_bwx_ops = { 75 alpha_pci_io_bwx_inb, 76 alpha_pci_io_bwx_inw, 77 alpha_pci_io_bwx_inl, 78 alpha_pci_io_bwx_outb, 79 alpha_pci_io_bwx_outw, 80 alpha_pci_io_bwx_outl, 81 }; 82 83 const struct alpha_pci_io_ops *alpha_pci_io_switch; 84 85 int 86 alpha_pci_io_enable(int onoff) 87 { 88 struct alpha_bus_window *abw; 89 int i, count; 90 91 if (onoff == 0 && alpha_pci_io_windows != NULL) { 92 for (i = 0; i < alpha_pci_io_window_count; i++) 93 alpha_bus_unmapwindow(&alpha_pci_io_windows[i]); 94 free(alpha_pci_io_windows); 95 alpha_pci_io_windows = NULL; 96 alpha_pci_io_window_count = 0; 97 alpha_pci_io_switch = NULL; 98 return (0); 99 } else if (onoff == 0) 100 return (0); 101 else if (alpha_pci_io_windows != NULL) 102 return (0); 103 104 count = alpha_bus_getwindows(ALPHA_BUS_TYPE_PCI_IO, &abw); 105 if (count <= 0) 106 return (-1); 107 108 for (i = 0; i < count; i++) { 109 if (alpha_bus_mapwindow(&abw[i]) == -1) { 110 free(abw); 111 return (-1); 112 } 113 } 114 115 alpha_pci_io_windows = abw; 116 alpha_pci_io_window_count = count; 117 118 if (abw->abw_abst.abst_flags & ABST_BWX) 119 alpha_pci_io_switch = &alpha_pci_io_bwx_ops; 120 else 121 alpha_pci_io_switch = &alpha_pci_io_swiz_ops; 122 123 return (0); 124 } 125 126 static inline struct alpha_bus_window * 127 alpha_pci_io_findwindow(bus_addr_t ioaddr) 128 { 129 struct alpha_bus_window *abw; 130 int i; 131 132 /* XXX Cache the last hit? */ 133 134 for (i = 0; i < alpha_pci_io_window_count; i++) { 135 abw = &alpha_pci_io_windows[i]; 136 if (ioaddr >= abw->abw_abst.abst_bus_start && 137 ioaddr <= abw->abw_abst.abst_bus_end) 138 return (abw); 139 } 140 141 warnx("alpha_pci_io_findwindow: no window for 0x%lx, ABORTING!", 142 (u_long) ioaddr); 143 abort(); 144 /* NOTREACHED */ 145 } 146 147 static inline uint32_t * 148 alpha_pci_io_swiz(bus_addr_t ioaddr, int size) 149 { 150 struct alpha_bus_window *abw = alpha_pci_io_findwindow(ioaddr); 151 uint32_t *port; 152 153 /* LINTED */ 154 port = (uint32_t *) ((char *)abw->abw_addr + 155 (((ioaddr - abw->abw_abst.abst_bus_start) << 156 abw->abw_abst.abst_addr_shift) | 157 (size << abw->abw_abst.abst_size_shift))); 158 159 return (port); 160 } 161 162 uint8_t 163 alpha_pci_io_swiz_inb(bus_addr_t ioaddr) 164 { 165 uint32_t *port = alpha_pci_io_swiz(ioaddr, 0); 166 bus_addr_t offset = ioaddr & 3; 167 168 alpha_mb(); 169 170 return ((*port >> (8 * offset)) & 0xff); 171 } 172 173 uint16_t 174 alpha_pci_io_swiz_inw(bus_addr_t ioaddr) 175 { 176 uint32_t *port = alpha_pci_io_swiz(ioaddr, 1); 177 bus_addr_t offset = ioaddr & 3; 178 179 alpha_mb(); 180 181 return ((*port >> (8 * offset)) & 0xffff); 182 } 183 184 uint32_t 185 alpha_pci_io_swiz_inl(bus_addr_t ioaddr) 186 { 187 uint32_t *port = alpha_pci_io_swiz(ioaddr, 3); 188 189 alpha_mb(); 190 191 return (*port); 192 } 193 194 void 195 alpha_pci_io_swiz_outb(bus_addr_t ioaddr, uint8_t val) 196 { 197 uint32_t *port = alpha_pci_io_swiz(ioaddr, 0); 198 bus_addr_t offset = ioaddr & 3; 199 uint32_t nval = ((uint32_t)val) << (uint32_t)(8 * offset); 200 201 *port = nval; 202 alpha_mb(); 203 } 204 205 void 206 alpha_pci_io_swiz_outw(bus_addr_t ioaddr, uint16_t val) 207 { 208 uint32_t *port = alpha_pci_io_swiz(ioaddr, 1); 209 bus_addr_t offset = ioaddr & 3; 210 uint32_t nval = ((uint32_t)val) << (uint32_t)(8 * offset); 211 212 *port = nval; 213 alpha_mb(); 214 } 215 216 void 217 alpha_pci_io_swiz_outl(bus_addr_t ioaddr, uint32_t val) 218 { 219 uint32_t *port = alpha_pci_io_swiz(ioaddr, 3); 220 221 *port = val; 222 alpha_mb(); 223 } 224 225 /* 226 * The following functions are used only on EV56 and greater CPUs, 227 * and the assembler requires going to EV56 mode in order to emit 228 * these instructions. 229 */ 230 __asm(".arch ev56"); 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 Thu Oct 16 14:10:15 GMT 2025