1 /* $NetBSD: xp.c,v 1.8 2023/01/15 05:08:33 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2016 Izumi Tsutsui. 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 OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 /* 28 * LUNA's Hitachi HD647180 "XP" I/O processor driver 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: xp.c,v 1.8 2023/01/15 05:08:33 tsutsui Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/fcntl.h> 39 #include <sys/ioctl.h> 40 #include <sys/kmem.h> 41 #include <sys/mman.h> 42 #include <sys/errno.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/autoconf.h> 47 #include <machine/board.h> 48 #include <machine/xpio.h> 49 50 #include <luna68k/dev/xpbusvar.h> 51 52 #include "ioconf.h" 53 #include "xplx/xplxdefs.h" 54 55 struct xp_softc { 56 device_t sc_dev; 57 58 vaddr_t sc_shm_base; 59 vsize_t sc_shm_size; 60 vaddr_t sc_tas; 61 62 bool sc_isopen; 63 int sc_flags; 64 }; 65 66 static int xp_match(device_t, cfdata_t, void *); 67 static void xp_attach(device_t, device_t, void *); 68 69 static dev_type_open(xp_open); 70 static dev_type_close(xp_close); 71 static dev_type_read(xp_read); 72 static dev_type_write(xp_write); 73 static dev_type_ioctl(xp_ioctl); 74 static dev_type_mmap(xp_mmap); 75 76 const struct cdevsw xp_cdevsw = { 77 .d_open = xp_open, 78 .d_close = xp_close, 79 .d_read = xp_read, 80 .d_write = xp_write, 81 .d_ioctl = xp_ioctl, 82 .d_stop = nostop, 83 .d_tty = notty, 84 .d_poll = nopoll, 85 .d_mmap = xp_mmap, 86 .d_kqfilter = nokqfilter, 87 .d_discard = nodiscard, 88 .d_flag = 0 89 }; 90 91 CFATTACH_DECL_NEW(xp, sizeof(struct xp_softc), 92 xp_match, xp_attach, NULL, NULL); 93 94 /* #define XP_DEBUG */ 95 96 #ifdef XP_DEBUG 97 #define XP_DEBUG_ALL 0xff 98 uint32_t xp_debug = 0; 99 #define DPRINTF(x, y) if (xp_debug & (x)) printf y 100 #else 101 #define DPRINTF(x, y) /* nothing */ 102 #endif 103 104 static bool xp_matched; 105 106 static int 107 xp_match(device_t parent, cfdata_t cf, void *aux) 108 { 109 struct xpbus_attach_args *xa = aux; 110 111 /* only one XP processor */ 112 if (xp_matched) 113 return 0; 114 115 if (strcmp(xa->xa_name, xp_cd.cd_name)) 116 return 0; 117 118 xp_matched = true; 119 return 1; 120 } 121 122 static void 123 xp_attach(device_t parent, device_t self, void *aux) 124 { 125 struct xp_softc *sc = device_private(self); 126 127 sc->sc_dev = self; 128 129 aprint_normal(": HD647180X I/O processor\n"); 130 131 sc->sc_shm_base = XP_SHM_BASE; 132 sc->sc_shm_size = XP_SHM_SIZE; 133 sc->sc_tas = XP_TAS_ADDR; 134 } 135 136 static int 137 xp_open(dev_t dev, int flags, int devtype, struct lwp *l) 138 { 139 struct xp_softc *sc; 140 int unit; 141 u_int a; 142 143 DPRINTF(XP_DEBUG_ALL, ("%s\n", __func__)); 144 145 unit = minor(dev); 146 sc = device_lookup_private(&xp_cd, unit); 147 if (sc == NULL) 148 return ENXIO; 149 if (sc->sc_isopen) 150 return EBUSY; 151 152 if ((flags & FWRITE) != 0) { 153 /* exclusive if write */ 154 a = xp_acquire(DEVID_XPBUS, XP_ACQ_EXCL); 155 if (a == 0) 156 return EBUSY; 157 if (a != (1 << DEVID_XPBUS)) { 158 xp_release(DEVID_XPBUS); 159 return EBUSY; 160 } 161 } else { 162 a = xp_acquire(DEVID_XPBUS, 0); 163 if (a == 0) 164 return EBUSY; 165 } 166 167 sc->sc_isopen = true; 168 sc->sc_flags = flags; 169 170 return 0; 171 } 172 173 static int 174 xp_close(dev_t dev, int flags, int mode, struct lwp *l) 175 { 176 struct xp_softc *sc; 177 int unit; 178 179 DPRINTF(XP_DEBUG_ALL, ("%s\n", __func__)); 180 181 unit = minor(dev); 182 sc = device_lookup_private(&xp_cd, unit); 183 184 xp_release(DEVID_XPBUS); 185 186 sc->sc_isopen = false; 187 188 return 0; 189 } 190 191 static int 192 xp_ioctl(dev_t dev, u_long cmd, void *addr, int flags, struct lwp *l) 193 { 194 struct xp_softc *sc; 195 int unit, error; 196 struct xp_download *downld; 197 uint8_t *loadbuf; 198 size_t loadsize; 199 200 DPRINTF(XP_DEBUG_ALL, ("%s\n", __func__)); 201 202 unit = minor(dev); 203 sc = device_lookup_private(&xp_cd, unit); 204 205 switch (cmd) { 206 case XPIOCDOWNLD: 207 if ((sc->sc_flags & FWRITE) == 0) { 208 return EACCES; 209 } 210 downld = addr; 211 loadsize = downld->size; 212 if (loadsize == 0 || loadsize > sc->sc_shm_size) { 213 return EINVAL; 214 } 215 216 loadbuf = kmem_alloc(loadsize, KM_SLEEP); 217 error = copyin(downld->data, loadbuf, loadsize); 218 if (error == 0) { 219 xp_set_shm_dirty(); 220 xp_cpu_reset_hold(); 221 delay(100); 222 memcpy((void *)sc->sc_shm_base, loadbuf, loadsize); 223 delay(100); 224 xp_cpu_reset_release(); 225 } else { 226 DPRINTF(XP_DEBUG_ALL, ("%s: ioctl failed (err = %d)\n", 227 __func__, error)); 228 } 229 230 kmem_free(loadbuf, loadsize); 231 return error; 232 233 default: 234 return ENOTTY; 235 } 236 237 panic("%s: cmd (%ld) is not handled", device_xname(sc->sc_dev), cmd); 238 } 239 240 static paddr_t 241 xp_mmap(dev_t dev, off_t offset, int prot) 242 { 243 struct xp_softc *sc; 244 int unit; 245 paddr_t pa; 246 247 pa = -1; 248 249 unit = minor(dev); 250 sc = device_lookup_private(&xp_cd, unit); 251 252 if (offset >= 0 && 253 offset < sc->sc_shm_size) { 254 pa = m68k_btop(m68k_trunc_page(sc->sc_shm_base) + offset); 255 } 256 257 if ((prot & PROT_WRITE) != 0) 258 xp_set_shm_dirty(); 259 260 return pa; 261 } 262 263 static int 264 xp_read(dev_t dev, struct uio *uio, int flags) 265 { 266 267 return ENODEV; 268 } 269 270 static int 271 xp_write(dev_t dev, struct uio *uio, int flags) 272 { 273 274 return ENODEV; 275 } 276
Indexes created Sat Sep 20 22:09:52 GMT 2025