iommu.c revision 1.2.2.3
1 1.2.2.3 thorpej /* $NetBSD: iommu.c,v 1.2.2.3 1999/08/02 21:43:52 thorpej Exp $ */ 2 1.2.2.2 thorpej 3 1.2.2.2 thorpej /*- 4 1.2.2.2 thorpej * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 1.2.2.2 thorpej * All rights reserved. 6 1.2.2.2 thorpej * 7 1.2.2.2 thorpej * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 thorpej * by Paul Kranenburg. 9 1.2.2.2 thorpej * 10 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 12 1.2.2.2 thorpej * are met: 13 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 18 1.2.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 thorpej * must display the following acknowledgement: 20 1.2.2.2 thorpej * This product includes software developed by the NetBSD 21 1.2.2.2 thorpej * Foundation, Inc. and its contributors. 22 1.2.2.2 thorpej * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2.2.2 thorpej * contributors may be used to endorse or promote products derived 24 1.2.2.2 thorpej * from this software without specific prior written permission. 25 1.2.2.2 thorpej * 26 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2.2.2 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2.2.2 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2.2.2 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2.2.2 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2.2.2 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2.2.2 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2.2.2 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2.2.2 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2.2.2 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2.2.2 thorpej * POSSIBILITY OF SUCH DAMAGE. 37 1.2.2.2 thorpej */ 38 1.2.2.2 thorpej 39 1.2.2.2 thorpej /* 40 1.2.2.2 thorpej * Copyright (c) 1992, 1993 41 1.2.2.2 thorpej * The Regents of the University of California. All rights reserved. 42 1.2.2.2 thorpej * 43 1.2.2.2 thorpej * This software was developed by the Computer Systems Engineering group 44 1.2.2.2 thorpej * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 45 1.2.2.2 thorpej * contributed to Berkeley. 46 1.2.2.2 thorpej * 47 1.2.2.2 thorpej * All advertising materials mentioning features or use of this software 48 1.2.2.2 thorpej * must display the following acknowledgement: 49 1.2.2.2 thorpej * This product includes software developed by the University of 50 1.2.2.2 thorpej * California, Lawrence Berkeley Laboratory. 51 1.2.2.2 thorpej * 52 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 53 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 54 1.2.2.2 thorpej * are met: 55 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 56 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 57 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 58 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 59 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 60 1.2.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 61 1.2.2.2 thorpej * must display the following acknowledgement: 62 1.2.2.2 thorpej * This product includes software developed by the University of 63 1.2.2.2 thorpej * California, Berkeley and its contributors. 64 1.2.2.2 thorpej * 4. Neither the name of the University nor the names of its contributors 65 1.2.2.2 thorpej * may be used to endorse or promote products derived from this software 66 1.2.2.2 thorpej * without specific prior written permission. 67 1.2.2.2 thorpej * 68 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 69 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 70 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 71 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 72 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 73 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 74 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 75 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 76 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 77 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 78 1.2.2.2 thorpej * SUCH DAMAGE. 79 1.2.2.2 thorpej * 80 1.2.2.2 thorpej * from: NetBSD: sbus.c,v 1.13 1999/05/23 07:24:02 mrg Exp 81 1.2.2.2 thorpej * from: @(#)sbus.c 8.1 (Berkeley) 6/11/93 82 1.2.2.2 thorpej */ 83 1.2.2.2 thorpej 84 1.2.2.2 thorpej #include <sys/param.h> 85 1.2.2.2 thorpej #include <sys/extent.h> 86 1.2.2.2 thorpej #include <sys/malloc.h> 87 1.2.2.2 thorpej #include <sys/systm.h> 88 1.2.2.2 thorpej #include <sys/device.h> 89 1.2.2.2 thorpej #include <vm/vm.h> 90 1.2.2.2 thorpej 91 1.2.2.2 thorpej #include <machine/bus.h> 92 1.2.2.2 thorpej #include <sparc64/sparc64/vaddrs.h> 93 1.2.2.2 thorpej #include <sparc64/dev/iommureg.h> 94 1.2.2.2 thorpej #include <sparc64/dev/iommuvar.h> 95 1.2.2.2 thorpej 96 1.2.2.2 thorpej #include <machine/autoconf.h> 97 1.2.2.2 thorpej #include <machine/ctlreg.h> 98 1.2.2.2 thorpej #include <machine/cpu.h> 99 1.2.2.2 thorpej 100 1.2.2.2 thorpej #ifdef DEBUG 101 1.2.2.2 thorpej #define IDB_DVMA 0x1 102 1.2.2.2 thorpej #define IDB_INTR 0x2 103 1.2.2.2 thorpej int iommudebug = 0; 104 1.2.2.2 thorpej #endif 105 1.2.2.2 thorpej 106 1.2.2.2 thorpej /* 107 1.2.2.2 thorpej * initialise the UltraSPARC IOMMU (SBUS or PCI): 108 1.2.2.2 thorpej * - allocate and setup the iotsb. 109 1.2.2.2 thorpej * - enable the IOMMU 110 1.2.2.2 thorpej * - initialise the streaming buffers 111 1.2.2.2 thorpej * - create a private DVMA map. 112 1.2.2.2 thorpej * 113 1.2.2.2 thorpej */ 114 1.2.2.2 thorpej void 115 1.2.2.2 thorpej iommu_init(name, is, tsbsize) 116 1.2.2.2 thorpej char *name; 117 1.2.2.2 thorpej struct iommu_state *is; 118 1.2.2.2 thorpej int tsbsize; 119 1.2.2.2 thorpej { 120 1.2.2.2 thorpej 121 1.2.2.2 thorpej /* 122 1.2.2.2 thorpej * Setup the iommu. 123 1.2.2.2 thorpej * 124 1.2.2.2 thorpej * The sun4u iommu is part of the SBUS controller so we will 125 1.2.2.2 thorpej * deal with it here. We could try to fake a device node so 126 1.2.2.2 thorpej * we can eventually share it with the PCI bus run by psycho, 127 1.2.2.2 thorpej * but I don't want to get into that sort of cruft. 128 1.2.2.2 thorpej * 129 1.2.2.2 thorpej * First we need to allocate a IOTSB. Problem is that the IOMMU 130 1.2.2.2 thorpej * can only access the IOTSB by physical address, so all the 131 1.2.2.2 thorpej * pages must be contiguous. Luckily, the smallest IOTSB size 132 1.2.2.2 thorpej * is one 8K page. 133 1.2.2.2 thorpej */ 134 1.2.2.2 thorpej if (tsbsize != 0) 135 1.2.2.2 thorpej panic("tsbsize != 0; FIX ME"); /* XXX */ 136 1.2.2.2 thorpej 137 1.2.2.2 thorpej /* we want 8K pages */ 138 1.2.2.2 thorpej is->is_cr = IOMMUCR_8KPG | IOMMUCR_EN; 139 1.2.2.2 thorpej /* 140 1.2.2.2 thorpej * 141 1.2.2.2 thorpej * The IOMMU address space always ends at 0xffffe000, but the starting 142 1.2.2.2 thorpej * address depends on the size of the map. The map size is 1024 * 2 ^ 143 1.2.2.2 thorpej * is->is_tsbsize entries, where each entry is 8 bytes. The start of 144 1.2.2.2 thorpej * the map can be calculated by (0xffffe000 << (8 + is->is_tsbsize)). 145 1.2.2.2 thorpej * 146 1.2.2.2 thorpej * Note: the stupid IOMMU ignores the high bits of an address, so a 147 1.2.2.2 thorpej * NULL DMA pointer will be translated by the first page of the IOTSB. 148 1.2.2.2 thorpej * To trap bugs we'll skip the first entry in the IOTSB. 149 1.2.2.2 thorpej */ 150 1.2.2.2 thorpej is->is_dvmabase = IOTSB_VSTART(is->is_tsbsize) + NBPG; 151 1.2.2.2 thorpej is->is_tsbsize = tsbsize; 152 1.2.2.2 thorpej is->is_tsb = malloc(NBPG, M_DMAMAP, M_WAITOK); /* XXX */ 153 1.2.2.3 thorpej (void) pmap_extract(pmap_kernel(), (vaddr_t)is->is_tsb, 154 1.2.2.3 thorpej (paddr_t *)&is->is_ptsb); 155 1.2.2.2 thorpej 156 1.2.2.2 thorpej #ifdef DEBUG 157 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 158 1.2.2.2 thorpej { 159 1.2.2.2 thorpej /* Probe the iommu */ 160 1.2.2.2 thorpej struct iommureg *regs = is->is_iommu; 161 1.2.2.2 thorpej int64_t cr, tsb; 162 1.2.2.2 thorpej 163 1.2.2.2 thorpej printf("iommu regs at: cr=%lx tsb=%lx flush=%lx\n", ®s->iommu_cr, 164 1.2.2.2 thorpej ®s->iommu_tsb, ®s->iommu_flush); 165 1.2.2.2 thorpej cr = regs->iommu_cr; 166 1.2.2.2 thorpej tsb = regs->iommu_tsb; 167 1.2.2.2 thorpej printf("iommu cr=%lx tsb=%lx\n", (long)cr, (long)tsb); 168 1.2.2.2 thorpej printf("TSB base %p phys %p\n", (long)is->is_tsb, (long)is->is_ptsb); 169 1.2.2.2 thorpej delay(1000000); /* 1 s */ 170 1.2.2.2 thorpej } 171 1.2.2.2 thorpej #endif 172 1.2.2.2 thorpej 173 1.2.2.2 thorpej /* 174 1.2.2.2 thorpej * Initialize streaming buffer. 175 1.2.2.2 thorpej */ 176 1.2.2.3 thorpej (void) pmap_extract(pmap_kernel(), (vaddr_t)&is->is_flush, 177 1.2.2.3 thorpej (paddr_t *)&is->is_flushpa); 178 1.2.2.2 thorpej 179 1.2.2.2 thorpej /* 180 1.2.2.2 thorpej * now actually start up the IOMMU 181 1.2.2.2 thorpej */ 182 1.2.2.2 thorpej iommu_reset(is); 183 1.2.2.2 thorpej 184 1.2.2.2 thorpej /* 185 1.2.2.2 thorpej * Now all the hardware's working we need to allocate a dvma map. 186 1.2.2.2 thorpej */ 187 1.2.2.2 thorpej is->is_dvmamap = extent_create(name, 188 1.2.2.2 thorpej is->is_dvmabase, IOTSB_VEND, 189 1.2.2.2 thorpej M_DEVBUF, 0, 0, EX_NOWAIT); 190 1.2.2.2 thorpej } 191 1.2.2.2 thorpej 192 1.2.2.2 thorpej void 193 1.2.2.2 thorpej iommu_reset(is) 194 1.2.2.2 thorpej struct iommu_state *is; 195 1.2.2.2 thorpej { 196 1.2.2.2 thorpej 197 1.2.2.2 thorpej /* Need to do 64-bit stores */ 198 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_cr, 0, is->is_cr); 199 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_tsb, 0, is->is_ptsb); 200 1.2.2.2 thorpej /* Enable diagnostics mode? */ 201 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_ctl, 0, STRBUF_EN); 202 1.2.2.2 thorpej } 203 1.2.2.2 thorpej 204 1.2.2.2 thorpej /* 205 1.2.2.2 thorpej * Here are the iommu control routines. 206 1.2.2.2 thorpej */ 207 1.2.2.2 thorpej void 208 1.2.2.2 thorpej iommu_enter(is, va, pa, flags) 209 1.2.2.2 thorpej struct iommu_state *is; 210 1.2.2.2 thorpej vaddr_t va; 211 1.2.2.2 thorpej int64_t pa; 212 1.2.2.2 thorpej int flags; 213 1.2.2.2 thorpej { 214 1.2.2.2 thorpej int64_t tte; 215 1.2.2.2 thorpej 216 1.2.2.2 thorpej #ifdef DIAGNOSTIC 217 1.2.2.2 thorpej if (va < is->is_dvmabase) 218 1.2.2.2 thorpej panic("sbus_enter: va 0x%lx not in DVMA space",va); 219 1.2.2.2 thorpej #endif 220 1.2.2.2 thorpej 221 1.2.2.2 thorpej tte = MAKEIOTTE(pa, !(flags&BUS_DMA_NOWRITE), !(flags&BUS_DMA_NOCACHE), 222 1.2.2.2 thorpej !(flags&BUS_DMA_COHERENT)); 223 1.2.2.2 thorpej 224 1.2.2.2 thorpej /* Is the streamcache flush really needed? */ 225 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_pgflush, 226 1.2.2.2 thorpej 0, va); 227 1.2.2.2 thorpej iommu_flush(is); 228 1.2.2.2 thorpej #ifdef DEBUG 229 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 230 1.2.2.2 thorpej printf("Clearing TSB slot %d for va %p\n", 231 1.2.2.2 thorpej (int)IOTSBSLOT(va,is->is_tsbsize), va); 232 1.2.2.2 thorpej #endif 233 1.2.2.2 thorpej is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)] = tte; 234 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_flush, 235 1.2.2.2 thorpej 0, va); 236 1.2.2.2 thorpej #ifdef DEBUG 237 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 238 1.2.2.2 thorpej printf("sbus_enter: va %lx pa %lx TSB[%lx]@%p=%lx\n", 239 1.2.2.2 thorpej va, (long)pa, IOTSBSLOT(va,is->is_tsbsize), 240 1.2.2.2 thorpej &is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)], 241 1.2.2.2 thorpej (long)tte); 242 1.2.2.2 thorpej #endif 243 1.2.2.2 thorpej } 244 1.2.2.2 thorpej 245 1.2.2.2 thorpej /* 246 1.2.2.2 thorpej * iommu_remove: removes mappings created by iommu_enter 247 1.2.2.2 thorpej * 248 1.2.2.2 thorpej * Only demap from IOMMU if flag is set. 249 1.2.2.2 thorpej */ 250 1.2.2.2 thorpej void 251 1.2.2.2 thorpej iommu_remove(is, va, len) 252 1.2.2.2 thorpej struct iommu_state *is; 253 1.2.2.2 thorpej vaddr_t va; 254 1.2.2.2 thorpej size_t len; 255 1.2.2.2 thorpej { 256 1.2.2.2 thorpej 257 1.2.2.2 thorpej #ifdef DIAGNOSTIC 258 1.2.2.2 thorpej if (va < is->is_dvmabase) 259 1.2.2.2 thorpej panic("sbus_remove: va 0x%lx not in DVMA space", (long)va); 260 1.2.2.2 thorpej if ((long)(va + len) < (long)va) 261 1.2.2.2 thorpej panic("sbus_remove: va 0x%lx + len 0x%lx wraps", 262 1.2.2.2 thorpej (long) va, (long) len); 263 1.2.2.2 thorpej if (len & ~0xfffffff) 264 1.2.2.2 thorpej panic("sbus_remove: rediculous len 0x%lx", (long)len); 265 1.2.2.2 thorpej #endif 266 1.2.2.2 thorpej 267 1.2.2.2 thorpej va = trunc_page(va); 268 1.2.2.2 thorpej while (len > 0) { 269 1.2.2.2 thorpej 270 1.2.2.2 thorpej /* 271 1.2.2.2 thorpej * Streaming buffer flushes: 272 1.2.2.2 thorpej * 273 1.2.2.2 thorpej * 1 Tell strbuf to flush by storing va to strbuf_pgflush 274 1.2.2.2 thorpej * If we're not on a cache line boundary (64-bits): 275 1.2.2.2 thorpej * 2 Store 0 in flag 276 1.2.2.2 thorpej * 3 Store pointer to flag in flushsync 277 1.2.2.2 thorpej * 4 wait till flushsync becomes 0x1 278 1.2.2.2 thorpej * 279 1.2.2.2 thorpej * If it takes more than .5 sec, something went wrong. 280 1.2.2.2 thorpej */ 281 1.2.2.2 thorpej #ifdef DEBUG 282 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 283 1.2.2.2 thorpej printf("sbus_remove: flushing va %p TSB[%lx]@%p=%lx, %lu bytes left\n", 284 1.2.2.2 thorpej (long)va, (long)IOTSBSLOT(va,is->is_tsbsize), 285 1.2.2.2 thorpej (long)&is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)], 286 1.2.2.2 thorpej (long)(is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)]), 287 1.2.2.2 thorpej (u_long)len); 288 1.2.2.2 thorpej #endif 289 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_pgflush, 0, va); 290 1.2.2.2 thorpej if (len <= NBPG) { 291 1.2.2.2 thorpej iommu_flush(is); 292 1.2.2.2 thorpej len = 0; 293 1.2.2.2 thorpej } else len -= NBPG; 294 1.2.2.2 thorpej #ifdef DEBUG 295 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 296 1.2.2.2 thorpej printf("sbus_remove: flushed va %p TSB[%lx]@%p=%lx, %lu bytes left\n", 297 1.2.2.2 thorpej (long)va, (long)IOTSBSLOT(va,is->is_tsbsize), 298 1.2.2.2 thorpej (long)&is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)], 299 1.2.2.2 thorpej (long)(is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)]), 300 1.2.2.2 thorpej (u_long)len); 301 1.2.2.2 thorpej #endif 302 1.2.2.2 thorpej is->is_tsb[IOTSBSLOT(va,is->is_tsbsize)] = 0; 303 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_iommu->iommu_flush, 0, va); 304 1.2.2.2 thorpej va += NBPG; 305 1.2.2.2 thorpej } 306 1.2.2.2 thorpej } 307 1.2.2.2 thorpej 308 1.2.2.2 thorpej int 309 1.2.2.2 thorpej iommu_flush(is) 310 1.2.2.2 thorpej struct iommu_state *is; 311 1.2.2.2 thorpej { 312 1.2.2.2 thorpej struct timeval cur, flushtimeout; 313 1.2.2.2 thorpej 314 1.2.2.2 thorpej #define BUMPTIME(t, usec) { \ 315 1.2.2.2 thorpej register volatile struct timeval *tp = (t); \ 316 1.2.2.2 thorpej register long us; \ 317 1.2.2.2 thorpej \ 318 1.2.2.2 thorpej tp->tv_usec = us = tp->tv_usec + (usec); \ 319 1.2.2.2 thorpej if (us >= 1000000) { \ 320 1.2.2.2 thorpej tp->tv_usec = us - 1000000; \ 321 1.2.2.2 thorpej tp->tv_sec++; \ 322 1.2.2.2 thorpej } \ 323 1.2.2.2 thorpej } 324 1.2.2.2 thorpej 325 1.2.2.2 thorpej is->is_flush = 0; 326 1.2.2.2 thorpej membar_sync(); 327 1.2.2.2 thorpej bus_space_write_8(is->is_bustag, &is->is_sb->strbuf_flushsync, 0, is->is_flushpa); 328 1.2.2.2 thorpej membar_sync(); 329 1.2.2.2 thorpej 330 1.2.2.2 thorpej microtime(&flushtimeout); 331 1.2.2.2 thorpej cur = flushtimeout; 332 1.2.2.2 thorpej BUMPTIME(&flushtimeout, 500000); /* 1/2 sec */ 333 1.2.2.2 thorpej 334 1.2.2.2 thorpej #ifdef DEBUG 335 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 336 1.2.2.2 thorpej printf("sbus_flush: flush = %lx at va = %lx pa = %lx now=%lx:%lx until = %lx:%lx\n", 337 1.2.2.2 thorpej (long)is->is_flush, (long)&is->is_flush, 338 1.2.2.2 thorpej (long)is->is_flushpa, cur.tv_sec, cur.tv_usec, 339 1.2.2.2 thorpej flushtimeout.tv_sec, flushtimeout.tv_usec); 340 1.2.2.2 thorpej #endif 341 1.2.2.2 thorpej /* Bypass non-coherent D$ */ 342 1.2.2.2 thorpej while (!ldxa(is->is_flushpa, ASI_PHYS_CACHED) && 343 1.2.2.2 thorpej ((cur.tv_sec <= flushtimeout.tv_sec) && 344 1.2.2.2 thorpej (cur.tv_usec <= flushtimeout.tv_usec))) 345 1.2.2.2 thorpej microtime(&cur); 346 1.2.2.2 thorpej 347 1.2.2.2 thorpej #ifdef DIAGNOSTIC 348 1.2.2.2 thorpej if (!is->is_flush) { 349 1.2.2.2 thorpej printf("sbus_flush: flush timeout %p at %p\n", (long)is->is_flush, 350 1.2.2.2 thorpej (long)is->is_flushpa); /* panic? */ 351 1.2.2.2 thorpej #ifdef DDB 352 1.2.2.2 thorpej Debugger(); 353 1.2.2.2 thorpej #endif 354 1.2.2.2 thorpej } 355 1.2.2.2 thorpej #endif 356 1.2.2.2 thorpej #ifdef DEBUG 357 1.2.2.2 thorpej if (iommudebug & IDB_DVMA) 358 1.2.2.2 thorpej printf("sbus_flush: flushed\n"); 359 1.2.2.2 thorpej #endif 360 1.2.2.2 thorpej return (is->is_flush); 361 1.2.2.2 thorpej } 362
Indexes created Fri Oct 03 02:09:57 GMT 2025