s3c2xx0_intr.c revision 1.1.2.2
1 1.1.2.2 thorpej /* $NetBSD: s3c2xx0_intr.c,v 1.1.2.2 2002/12/11 05:53:16 thorpej Exp $ */ 2 1.1.2.2 thorpej 3 1.1.2.2 thorpej /* 4 1.1.2.2 thorpej * Copyright (c) 2002 Fujitsu Component Limited 5 1.1.2.2 thorpej * Copyright (c) 2002 Genetec Corporation 6 1.1.2.2 thorpej * All rights reserved. 7 1.1.2.2 thorpej * 8 1.1.2.2 thorpej * Redistribution and use in source and binary forms, with or without 9 1.1.2.2 thorpej * modification, are permitted provided that the following conditions 10 1.1.2.2 thorpej * are met: 11 1.1.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 12 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer. 13 1.1.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 14 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 15 1.1.2.2 thorpej * documentation and/or other materials provided with the distribution. 16 1.1.2.2 thorpej * 3. Neither the name of The Fujitsu Component Limited nor the name of 17 1.1.2.2 thorpej * Genetec corporation may not be used to endorse or promote products 18 1.1.2.2 thorpej * derived from this software without specific prior written permission. 19 1.1.2.2 thorpej * 20 1.1.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC 21 1.1.2.2 thorpej * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 22 1.1.2.2 thorpej * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 1.1.2.2 thorpej * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 1.1.2.2 thorpej * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC 25 1.1.2.2 thorpej * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 1.1.2.2 thorpej * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 1.1.2.2 thorpej * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 1.1.2.2 thorpej * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 1.1.2.2 thorpej * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 1.1.2.2 thorpej * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 1.1.2.2 thorpej * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1.2.2 thorpej * SUCH DAMAGE. 33 1.1.2.2 thorpej */ 34 1.1.2.2 thorpej 35 1.1.2.2 thorpej /* 36 1.1.2.2 thorpej * Common part of IRQ handlers for Samsung S3C2800/2400/2410 processors. 37 1.1.2.2 thorpej * derived from i80321_icu.c 38 1.1.2.2 thorpej */ 39 1.1.2.2 thorpej 40 1.1.2.2 thorpej /* 41 1.1.2.2 thorpej * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 42 1.1.2.2 thorpej * All rights reserved. 43 1.1.2.2 thorpej * 44 1.1.2.2 thorpej * Written by Jason R. Thorpe for Wasabi Systems, Inc. 45 1.1.2.2 thorpej * 46 1.1.2.2 thorpej * Redistribution and use in source and binary forms, with or without 47 1.1.2.2 thorpej * modification, are permitted provided that the following conditions 48 1.1.2.2 thorpej * are met: 49 1.1.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 50 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer. 51 1.1.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 52 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 53 1.1.2.2 thorpej * documentation and/or other materials provided with the distribution. 54 1.1.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 55 1.1.2.2 thorpej * must display the following acknowledgement: 56 1.1.2.2 thorpej * This product includes software developed for the NetBSD Project by 57 1.1.2.2 thorpej * Wasabi Systems, Inc. 58 1.1.2.2 thorpej * 4. The name of Wasabi Systems, Inc. may not be used to endorse 59 1.1.2.2 thorpej * or promote products derived from this software without specific prior 60 1.1.2.2 thorpej * written permission. 61 1.1.2.2 thorpej * 62 1.1.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 63 1.1.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 64 1.1.2.2 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 65 1.1.2.2 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 66 1.1.2.2 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 67 1.1.2.2 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 68 1.1.2.2 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 69 1.1.2.2 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 70 1.1.2.2 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 71 1.1.2.2 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 72 1.1.2.2 thorpej * POSSIBILITY OF SUCH DAMAGE. 73 1.1.2.2 thorpej */ 74 1.1.2.2 thorpej 75 1.1.2.2 thorpej #include <sys/param.h> 76 1.1.2.2 thorpej #include <sys/systm.h> 77 1.1.2.2 thorpej #include <sys/malloc.h> 78 1.1.2.2 thorpej #include <uvm/uvm_extern.h> 79 1.1.2.2 thorpej #include <machine/bus.h> 80 1.1.2.2 thorpej #include <machine/intr.h> 81 1.1.2.2 thorpej #include <arm/cpufunc.h> 82 1.1.2.2 thorpej 83 1.1.2.2 thorpej #include <arm/s3c2xx0/s3c2xx0reg.h> 84 1.1.2.2 thorpej #include <arm/s3c2xx0/s3c2xx0var.h> 85 1.1.2.2 thorpej #include <arm/s3c2xx0/s3c2xx0_intr.h> 86 1.1.2.2 thorpej 87 1.1.2.2 thorpej volatile uint32_t *s3c2xx0_intr_mask_reg; 88 1.1.2.2 thorpej 89 1.1.2.2 thorpej static __inline void 90 1.1.2.2 thorpej __raise(int ipl) 91 1.1.2.2 thorpej { 92 1.1.2.2 thorpej if (current_spl_level < ipl) { 93 1.1.2.2 thorpej s3c2xx0_setipl(ipl); 94 1.1.2.2 thorpej } 95 1.1.2.2 thorpej } 96 1.1.2.2 thorpej /* 97 1.1.2.2 thorpej * modify interrupt mask table for SPL levels 98 1.1.2.2 thorpej */ 99 1.1.2.2 thorpej void 100 1.1.2.2 thorpej s3c2xx0_update_intr_masks(int irqno, int level) 101 1.1.2.2 thorpej { 102 1.1.2.2 thorpej int mask = 1 << irqno; 103 1.1.2.2 thorpej int i; 104 1.1.2.2 thorpej 105 1.1.2.2 thorpej 106 1.1.2.2 thorpej s3c2xx0_ilevel[irqno] = level; 107 1.1.2.2 thorpej 108 1.1.2.2 thorpej for (i = 0; i < level; ++i) 109 1.1.2.2 thorpej s3c2xx0_imask[i] |= mask; /* Enable interrupt at lower 110 1.1.2.2 thorpej * level */ 111 1.1.2.2 thorpej for (; i < NIPL - 1; ++i) 112 1.1.2.2 thorpej s3c2xx0_imask[i] &= ~mask; /* Disable itnerrupt at upper 113 1.1.2.2 thorpej * level */ 114 1.1.2.2 thorpej 115 1.1.2.2 thorpej /* 116 1.1.2.2 thorpej * Enforce a heirarchy that gives "slow" device (or devices with 117 1.1.2.2 thorpej * limited input buffer space/"real-time" requirements) a better 118 1.1.2.2 thorpej * chance at not dropping data. 119 1.1.2.2 thorpej */ 120 1.1.2.2 thorpej s3c2xx0_imask[IPL_BIO] &= s3c2xx0_imask[IPL_SOFTNET]; 121 1.1.2.2 thorpej s3c2xx0_imask[IPL_NET] &= s3c2xx0_imask[IPL_BIO]; 122 1.1.2.2 thorpej s3c2xx0_imask[IPL_SOFTSERIAL] &= s3c2xx0_imask[IPL_NET]; 123 1.1.2.2 thorpej s3c2xx0_imask[IPL_TTY] &= s3c2xx0_imask[IPL_SOFTSERIAL]; 124 1.1.2.2 thorpej 125 1.1.2.2 thorpej /* 126 1.1.2.2 thorpej * splvm() blocks all interrupts that use the kernel memory 127 1.1.2.2 thorpej * allocation facilities. 128 1.1.2.2 thorpej */ 129 1.1.2.2 thorpej s3c2xx0_imask[IPL_IMP] &= s3c2xx0_imask[IPL_TTY]; 130 1.1.2.2 thorpej 131 1.1.2.2 thorpej /* 132 1.1.2.2 thorpej * Audio devices are not allowed to perform memory allocation 133 1.1.2.2 thorpej * in their interrupt routines, and they have fairly "real-time" 134 1.1.2.2 thorpej * requirements, so give them a high interrupt priority. 135 1.1.2.2 thorpej */ 136 1.1.2.2 thorpej s3c2xx0_imask[IPL_AUDIO] &= s3c2xx0_imask[IPL_IMP]; 137 1.1.2.2 thorpej 138 1.1.2.2 thorpej /* 139 1.1.2.2 thorpej * splclock() must block anything that uses the scheduler. 140 1.1.2.2 thorpej */ 141 1.1.2.2 thorpej s3c2xx0_imask[IPL_CLOCK] &= s3c2xx0_imask[IPL_AUDIO]; 142 1.1.2.2 thorpej 143 1.1.2.2 thorpej /* 144 1.1.2.2 thorpej * splhigh() must block "everything". 145 1.1.2.2 thorpej */ 146 1.1.2.2 thorpej s3c2xx0_imask[IPL_HIGH] &= s3c2xx0_imask[IPL_STATCLOCK]; 147 1.1.2.2 thorpej 148 1.1.2.2 thorpej /* 149 1.1.2.2 thorpej * XXX We need serial drivers to run at the absolute highest priority 150 1.1.2.2 thorpej * in order to avoid overruns, so serial > high. 151 1.1.2.2 thorpej */ 152 1.1.2.2 thorpej s3c2xx0_imask[IPL_SERIAL] &= s3c2xx0_imask[IPL_HIGH]; 153 1.1.2.2 thorpej 154 1.1.2.2 thorpej } 155 1.1.2.2 thorpej 156 1.1.2.2 thorpej 157 1.1.2.2 thorpej static void 158 1.1.2.2 thorpej init_interrupt_masks(void) 159 1.1.2.2 thorpej { 160 1.1.2.2 thorpej int i; 161 1.1.2.2 thorpej s3c2xx0_imask[IPL_NONE] = 0xffffffff; 162 1.1.2.2 thorpej 163 1.1.2.2 thorpej for (i = IPL_BIO; i < IPL_SOFTSERIAL; ++i) 164 1.1.2.2 thorpej s3c2xx0_imask[i] = SI_TO_IRQBIT(SI_SOFTSERIAL); 165 1.1.2.2 thorpej for (; i < NIPL; ++i) 166 1.1.2.2 thorpej s3c2xx0_imask[i] = 0; 167 1.1.2.2 thorpej 168 1.1.2.2 thorpej /* 169 1.1.2.2 thorpej * Initialize the soft interrupt masks to block themselves. 170 1.1.2.2 thorpej */ 171 1.1.2.2 thorpej s3c2xx0_imask[IPL_SOFT] = ~SI_TO_IRQBIT(SI_SOFT); 172 1.1.2.2 thorpej s3c2xx0_imask[IPL_SOFTCLOCK] = ~SI_TO_IRQBIT(SI_SOFTCLOCK); 173 1.1.2.2 thorpej s3c2xx0_imask[IPL_SOFTNET] = ~SI_TO_IRQBIT(SI_SOFTNET); 174 1.1.2.2 thorpej 175 1.1.2.2 thorpej /* 176 1.1.2.2 thorpej * splsoftclock() is the only interface that users of the 177 1.1.2.2 thorpej * generic software interrupt facility have to block their 178 1.1.2.2 thorpej * soft intrs, so splsoftclock() must also block IPL_SOFT. 179 1.1.2.2 thorpej */ 180 1.1.2.2 thorpej s3c2xx0_imask[IPL_SOFTCLOCK] &= s3c2xx0_imask[IPL_SOFT]; 181 1.1.2.2 thorpej 182 1.1.2.2 thorpej /* 183 1.1.2.2 thorpej * splsoftnet() must also block splsoftclock(), since we don't 184 1.1.2.2 thorpej * want timer-driven network events to occur while we're 185 1.1.2.2 thorpej * processing incoming packets. 186 1.1.2.2 thorpej */ 187 1.1.2.2 thorpej s3c2xx0_imask[IPL_SOFTNET] &= s3c2xx0_imask[IPL_SOFTCLOCK]; 188 1.1.2.2 thorpej 189 1.1.2.2 thorpej } 190 1.1.2.2 thorpej 191 1.1.2.2 thorpej 192 1.1.2.2 thorpej /* 193 1.1.2.2 thorpej * Disable/enable interrupts. 194 1.1.2.2 thorpej * This is for S3C2XX0's intergrated UART, which can't disable tx/rx 195 1.1.2.2 thorpej * interrupts without disabling tx/rx by means of UART regsiters. 196 1.1.2.2 thorpej */ 197 1.1.2.2 thorpej void 198 1.1.2.2 thorpej s3c2xx0_mask_interrupts(int mask) 199 1.1.2.2 thorpej { 200 1.1.2.2 thorpej int save = disable_interrupts(I32_bit); 201 1.1.2.2 thorpej int i; 202 1.1.2.2 thorpej 203 1.1.2.2 thorpej for (i = 0; i < NIPL - 1; ++i) 204 1.1.2.2 thorpej s3c2xx0_imask[i] &= ~mask; 205 1.1.2.2 thorpej 206 1.1.2.2 thorpej intr_mask = s3c2xx0_imask[current_spl_level]; 207 1.1.2.2 thorpej *s3c2xx0_intr_mask_reg = intr_mask; 208 1.1.2.2 thorpej 209 1.1.2.2 thorpej restore_interrupts(save); 210 1.1.2.2 thorpej } 211 1.1.2.2 thorpej 212 1.1.2.2 thorpej void 213 1.1.2.2 thorpej s3c2xx0_unmask_interrupts(int mask) 214 1.1.2.2 thorpej { 215 1.1.2.2 thorpej int save = disable_interrupts(I32_bit); 216 1.1.2.2 thorpej int i; 217 1.1.2.2 thorpej 218 1.1.2.2 thorpej for (i = 0; i < ICU_LEN; ++i) { 219 1.1.2.2 thorpej if ((mask & (1 << i)) == 0) 220 1.1.2.2 thorpej continue; 221 1.1.2.2 thorpej s3c2xx0_update_intr_masks(i, s3c2xx0_ilevel[i]); 222 1.1.2.2 thorpej } 223 1.1.2.2 thorpej 224 1.1.2.2 thorpej intr_mask = s3c2xx0_imask[current_spl_level]; 225 1.1.2.2 thorpej *s3c2xx0_intr_mask_reg = intr_mask; 226 1.1.2.2 thorpej 227 1.1.2.2 thorpej restore_interrupts(save); 228 1.1.2.2 thorpej } 229 1.1.2.2 thorpej 230 1.1.2.2 thorpej void 231 1.1.2.2 thorpej s3c2xx0_do_pending(void) 232 1.1.2.2 thorpej { 233 1.1.2.2 thorpej static __cpu_simple_lock_t processing = __SIMPLELOCK_UNLOCKED; 234 1.1.2.2 thorpej int oldirqstate, spl_save; 235 1.1.2.2 thorpej 236 1.1.2.2 thorpej if (__cpu_simple_lock_try(&processing) == 0) 237 1.1.2.2 thorpej return; 238 1.1.2.2 thorpej 239 1.1.2.2 thorpej spl_save = current_spl_level; 240 1.1.2.2 thorpej 241 1.1.2.2 thorpej oldirqstate = disable_interrupts(I32_bit); 242 1.1.2.2 thorpej 243 1.1.2.2 thorpej #define DO_SOFTINT(si,ipl) \ 244 1.1.2.2 thorpej if ((softint_pending & intr_mask) & SI_TO_IRQBIT(si)) { \ 245 1.1.2.2 thorpej softint_pending &= ~SI_TO_IRQBIT(si); \ 246 1.1.2.2 thorpej __raise(ipl); \ 247 1.1.2.2 thorpej restore_interrupts(oldirqstate); \ 248 1.1.2.2 thorpej softintr_dispatch(si); \ 249 1.1.2.2 thorpej oldirqstate = disable_interrupts(I32_bit); \ 250 1.1.2.2 thorpej s3c2xx0_setipl(spl_save); \ 251 1.1.2.2 thorpej } 252 1.1.2.2 thorpej 253 1.1.2.2 thorpej do { 254 1.1.2.2 thorpej DO_SOFTINT(SI_SOFTSERIAL, IPL_SOFTSERIAL); 255 1.1.2.2 thorpej DO_SOFTINT(SI_SOFTNET, IPL_SOFTNET); 256 1.1.2.2 thorpej DO_SOFTINT(SI_SOFTCLOCK, IPL_SOFTCLOCK); 257 1.1.2.2 thorpej DO_SOFTINT(SI_SOFT, IPL_SOFT); 258 1.1.2.2 thorpej } while (softint_pending & intr_mask); 259 1.1.2.2 thorpej 260 1.1.2.2 thorpej __cpu_simple_unlock(&processing); 261 1.1.2.2 thorpej 262 1.1.2.2 thorpej restore_interrupts(oldirqstate); 263 1.1.2.2 thorpej } 264 1.1.2.2 thorpej 265 1.1.2.2 thorpej 266 1.1.2.2 thorpej static int 267 1.1.2.2 thorpej stray_interrupt(void *cookie) 268 1.1.2.2 thorpej { 269 1.1.2.2 thorpej int save; 270 1.1.2.2 thorpej int irqno = (int) cookie; 271 1.1.2.2 thorpej printf("stray interrupt %d\n", irqno); 272 1.1.2.2 thorpej 273 1.1.2.2 thorpej save = disable_interrupts(I32_bit); 274 1.1.2.2 thorpej *s3c2xx0_intr_mask_reg &= ~(1U << irqno); 275 1.1.2.2 thorpej restore_interrupts(save); 276 1.1.2.2 thorpej 277 1.1.2.2 thorpej return 0; 278 1.1.2.2 thorpej } 279 1.1.2.2 thorpej /* 280 1.1.2.2 thorpej * Initialize interrupt dispatcher. 281 1.1.2.2 thorpej */ 282 1.1.2.2 thorpej void 283 1.1.2.2 thorpej s3c2xx0_intr_init(struct s3c2xx0_intr_dispatch * dispatch_table, int icu_len) 284 1.1.2.2 thorpej { 285 1.1.2.2 thorpej int i; 286 1.1.2.2 thorpej 287 1.1.2.2 thorpej for (i = 0; i < icu_len; ++i) { 288 1.1.2.2 thorpej dispatch_table[i].func = stray_interrupt; 289 1.1.2.2 thorpej dispatch_table[i].cookie = (void *) (i); 290 1.1.2.2 thorpej dispatch_table[i].level = IPL_BIO; 291 1.1.2.2 thorpej } 292 1.1.2.2 thorpej 293 1.1.2.2 thorpej init_interrupt_masks(); 294 1.1.2.2 thorpej 295 1.1.2.2 thorpej _splraise(IPL_SERIAL); 296 1.1.2.2 thorpej enable_interrupts(I32_bit); 297 1.1.2.2 thorpej } 298 1.1.2.2 thorpej #undef splx 299 1.1.2.2 thorpej void 300 1.1.2.2 thorpej splx(int ipl) 301 1.1.2.2 thorpej { 302 1.1.2.2 thorpej s3c2xx0_splx(ipl); 303 1.1.2.2 thorpej } 304 1.1.2.2 thorpej #undef _splraise 305 1.1.2.2 thorpej int 306 1.1.2.2 thorpej _splraise(int ipl) 307 1.1.2.2 thorpej { 308 1.1.2.2 thorpej return s3c2xx0_splraise(ipl); 309 1.1.2.2 thorpej } 310 1.1.2.2 thorpej #undef _spllower 311 1.1.2.2 thorpej int 312 1.1.2.2 thorpej _spllower(int ipl) 313 1.1.2.2 thorpej { 314 1.1.2.2 thorpej return s3c2xx0_spllower(ipl); 315 1.1.2.2 thorpej } 316 1.1.2.2 thorpej #undef _setsoftintr 317 1.1.2.2 thorpej void 318 1.1.2.2 thorpej _setsoftintr(int si) 319 1.1.2.2 thorpej { 320 1.1.2.2 thorpej return s3c2xx0_setsoftintr(si); 321 1.1.2.2 thorpej } 322
Indexes created Thu Oct 23 22:10:10 GMT 2025