bcu_vrip.c revision 1.6
1 /* $NetBSD: bcu_vrip.c,v 1.6 2000/10/27 08:10:32 sato Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 SATO Kazumi. All rights reserved. 5 * Copyright (c) 1999 PocketBSD Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the PocketBSD project 18 * and its contributors. 19 * 4. Neither the name of the project nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/reboot.h> 41 42 #include <machine/bus.h> 43 44 #include <mips/cpuregs.h> 45 46 #include <hpcmips/vr/vr.h> 47 #include <hpcmips/vr/vripvar.h> 48 #include <hpcmips/vr/vripreg.h> 49 #include <hpcmips/vr/bcureg.h> 50 #include <hpcmips/vr/bcuvar.h> 51 52 static int vrbcu_match __P((struct device *, struct cfdata *, void *)); 53 static void vrbcu_attach __P((struct device *, struct device *, void *)); 54 55 static void vrbcu_write __P((struct vrbcu_softc *, int, unsigned short)); 56 static unsigned short vrbcu_read __P((struct vrbcu_softc *, int)); 57 58 static void vrbcu_dump_regs __P((void)); 59 60 char *vr_cpuname=NULL; 61 int vr_major=-1; 62 int vr_minor=-1; 63 int vr_cpuid=-1; 64 65 struct cfattach vrbcu_ca = { 66 sizeof(struct vrbcu_softc), vrbcu_match, vrbcu_attach 67 }; 68 69 struct vrbcu_softc *the_bcu_sc = NULL; 70 71 static inline void 72 vrbcu_write(sc, port, val) 73 struct vrbcu_softc *sc; 74 int port; 75 unsigned short val; 76 { 77 bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val); 78 } 79 80 static inline unsigned short 81 vrbcu_read(sc, port) 82 struct vrbcu_softc *sc; 83 int port; 84 { 85 return bus_space_read_2(sc->sc_iot, sc->sc_ioh, port); 86 } 87 88 static int 89 vrbcu_match(parent, cf, aux) 90 struct device *parent; 91 struct cfdata *cf; 92 void *aux; 93 { 94 return 2; 95 } 96 97 static void 98 vrbcu_attach(parent, self, aux) 99 struct device *parent; 100 struct device *self; 101 void *aux; 102 { 103 struct vrip_attach_args *va = aux; 104 struct vrbcu_softc *sc = (struct vrbcu_softc *)self; 105 106 sc->sc_iot = va->va_iot; 107 bus_space_map(sc->sc_iot, va->va_addr, va->va_size, 108 0, /* no flags */ 109 &sc->sc_ioh); 110 111 printf("\n"); 112 the_bcu_sc = sc; 113 vrbcu_dump_regs(); 114 } 115 116 static void 117 vrbcu_dump_regs() 118 { 119 struct vrbcu_softc *sc = the_bcu_sc; 120 int reg; 121 int cpuclock, tclock, vtclock, cpuid, vt; 122 123 #ifdef VRBCUDEBUG 124 reg = vrbcu_read(sc, BCUCNT1_REG_W); 125 printf("vrbcu: CNT1 %x: ", reg); 126 bitdisp16(reg); 127 reg = vrbcu_read(sc, BCUCNT2_REG_W); 128 printf("vrbcu: CNT2 %x: ", reg); 129 bitdisp16(reg); 130 reg = vrbcu_read(sc, BCUSPEED_REG_W); 131 printf("vrbcu: SPEED %x: ", reg); 132 bitdisp16(reg); 133 reg = vrbcu_read(sc, BCUERRST_REG_W); 134 printf("vrbcu: ERRST %x: ", reg); 135 bitdisp16(reg); 136 reg = vrbcu_read(sc, BCURFCNT_REG_W); 137 printf("vrbcu: RFCNT %x\n", reg); 138 reg = vrbcu_read(sc, BCUREFCOUNT_REG_W); 139 printf("vrbcu: RFCOUNT %x\n", reg); 140 #endif /* VRBCUDEBUG */ 141 reg = vrbcu_read(sc, BCUCLKSPEED_REG_W); 142 #ifdef VRBCUDEBUG 143 printf("vrbcu: CLKSPEED %x: \n", reg); 144 #endif /* VRBCUDEBUG */ 145 cpuclock = vrbcu_vrip_getcpuclock(); 146 cpuid = vrbcu_vrip_getcpuid(); 147 148 switch (cpuid) { 149 case BCUREVID_RID_4101: 150 /* assume 33MHz */ 151 vtclock = tclock = cpuclock/2; /* XXX */ 152 break; 153 case BCUREVID_RID_4102: 154 vtclock = tclock = cpuclock/2; 155 break; 156 case BCUREVID_RID_4111: 157 if ((reg&BCUCLKSPEED_DIVT2B) == 0) 158 vtclock = tclock = cpuclock/2; 159 else if ((reg&BCUCLKSPEED_DIVT3B) == 0) 160 vtclock = tclock = cpuclock/3; 161 else if ((reg&BCUCLKSPEED_DIVT4B) == 0) 162 vtclock = tclock = cpuclock/4; 163 else 164 vtclock = tclock = 0; /* XXX */ 165 break; 166 case BCUREVID_RID_4121: 167 tclock = cpuclock / ((reg&BCUCLKSPEED_DIVTMASK)>>BCUCLKSPEED_DIVTSHFT); 168 vt = ((reg&BCUCLKSPEED_DIVVTMASK)>>BCUCLKSPEED_DIVVTSHFT); 169 if (vt == 0) 170 vtclock = 0; /* XXX */ 171 else if (vt < 0x9) 172 vtclock = cpuclock / vt; 173 else 174 vtclock = cpuclock / ((vt - 8)*2+1) * 2; 175 break; 176 default: 177 break; 178 } 179 printf("%s: cpu %d.%03dMHz, bus %d.%03dMHz, ram %d.%03dMHz\n", 180 sc->sc_dev.dv_xname, 181 cpuclock/1000000, (cpuclock%1000000)/1000, 182 tclock/1000000, (tclock%1000000)/1000, 183 vtclock/1000000, (vtclock%1000000)/1000); 184 #ifdef VRBCUDEBUG 185 if (cpuid >= BCUREVID_RID_4111) { 186 reg = vrbcu_read(sc, BCUCNT3_REG_W); 187 printf("vrbcu: CNT3 %x: ", reg); 188 bitdisp16(reg); 189 } 190 #endif /* VRBCUDEBUG */ 191 192 } 193 194 static char *cpuname[] = { 195 "VR4101", 196 "VR4102", 197 "VR4111", 198 "VR4121", 199 "UNKNOWN", 200 "UNKNOWN", 201 "UNKNOWN", 202 "UNKNOWN" }; 203 204 int 205 vrbcu_vrip_getcpuid(void) 206 { 207 volatile u_int16_t *revreg; 208 209 if (vr_cpuid != -1) 210 return vr_cpuid; 211 212 if (vr_cpuid == -1) { 213 revreg = (u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUREVID_REG_W)); 214 215 vr_cpuid = *revreg; 216 vr_cpuid = (vr_cpuid&BCUREVID_RIDMASK)>>BCUREVID_RIDSHFT; 217 } 218 return vr_cpuid; 219 } 220 221 char * 222 vrbcu_vrip_getcpuname(void) 223 { 224 int cpuid; 225 226 if (vr_cpuname != NULL) 227 return vr_cpuname; 228 229 cpuid = vrbcu_vrip_getcpuid(); 230 vr_cpuname = cpuname[cpuid]; 231 return vr_cpuname; 232 } 233 234 235 int 236 vrbcu_vrip_getcpumajor(void) 237 { 238 volatile u_int16_t *revreg; 239 240 if (vr_major != -1) 241 return vr_major; 242 243 revreg = (u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUREVID_REG_W)); 244 245 vr_major = *revreg; 246 vr_major = (vr_major&BCUREVID_MJREVMASK)>>BCUREVID_MJREVSHFT; 247 return vr_major; 248 } 249 250 int 251 vrbcu_vrip_getcpuminor(void) 252 { 253 volatile u_int16_t *revreg; 254 255 if (vr_minor != -1) 256 return vr_minor; 257 258 revreg = (u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUREVID_REG_W)); 259 260 vr_minor = *revreg; 261 vr_minor = (vr_minor&BCUREVID_MNREVMASK)>>BCUREVID_MNREVSHFT; 262 return vr_minor; 263 } 264 265 #define CLKX 18432000 /* CLKX1,CLKX2: 18.432MHz */ 266 #define MHZ 1000000 267 268 int 269 vrbcu_vrip_getcpuclock(void) 270 { 271 u_int16_t clksp; 272 int cpuid, cpuclock; 273 274 clksp = *(u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUCLKSPEED_REG_W)) & BCUCLKSPEED_CLKSPMASK; 275 cpuid = vrbcu_vrip_getcpuid(); 276 277 switch (cpuid) { 278 case BCUREVID_RID_4101: 279 /* assume 33MHz */ 280 cpuclock = 33000000; 281 /* branch delay is 1 clock; 2 clock/loop */ 282 cpuspeed = (cpuclock / 2 + MHZ / 2) / MHZ; 283 break; 284 case BCUREVID_RID_4102: 285 cpuclock = CLKX / clksp * 32; 286 /* branch delay is 1 clock; 2 clock/loop */ 287 cpuspeed = (cpuclock / 2 + MHZ / 2) / MHZ; 288 break; 289 case BCUREVID_RID_4111: 290 cpuclock = CLKX / clksp * 64; 291 /* branch delay is 1 clock; 2 clock/loop */ 292 cpuspeed = (cpuclock / 2 + MHZ / 2) / MHZ; 293 break; 294 case BCUREVID_RID_4121: 295 cpuclock = CLKX / clksp * 64; 296 /* branch delay is 2 clock; 3 clock/loop */ 297 cpuspeed = (cpuclock / 3 + MHZ / 2) / MHZ; 298 break; 299 default: 300 panic("unknown CPU type %d\n", cpuid); 301 break; 302 } 303 return cpuclock; 304 } 305
Indexes created Tue Oct 28 12:10:06 GMT 2025