1 /* $NetBSD: emul.c,v 1.160 2013/12/16 15:36:29 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2007-2011 Antti Kantee. 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 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: emul.c,v 1.160 2013/12/16 15:36:29 pooka Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/null.h> 33 #include <sys/vnode.h> 34 #include <sys/stat.h> 35 #include <sys/select.h> 36 #include <sys/syslog.h> 37 #include <sys/namei.h> 38 #include <sys/kauth.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/queue.h> 42 #include <sys/file.h> 43 #include <sys/cpu.h> 44 #include <sys/kmem.h> 45 #include <sys/poll.h> 46 #include <sys/timetc.h> 47 #include <sys/tprintf.h> 48 #include <sys/module.h> 49 #include <sys/tty.h> 50 #include <sys/reboot.h> 51 #include <sys/syscall.h> 52 #include <sys/syscallvar.h> 53 #include <sys/xcall.h> 54 #include <sys/sleepq.h> 55 56 #include <dev/cons.h> 57 58 #include <rump/rumpuser.h> 59 60 #include <uvm/uvm_map.h> 61 62 #include "rump_private.h" 63 64 /* 65 * physmem is largely unused (except for nmbcluster calculations), 66 * so pick a default value which suits ZFS. if an application wants 67 * a very small memory footprint, it can still adjust this before 68 * calling rump_init() 69 */ 70 #define PHYSMEM 512*256 71 int physmem = PHYSMEM; 72 int nkmempages = PHYSMEM/2; /* from le chapeau */ 73 #undef PHYSMEM 74 75 struct lwp lwp0; 76 struct vnode *rootvp; 77 dev_t rootdev = NODEV; 78 79 const int schedppq = 1; 80 int hardclock_ticks; 81 bool mp_online = false; 82 struct timeval boottime; 83 int cold = 1; 84 int boothowto = AB_SILENT; 85 struct tty *constty; 86 87 const struct bdevsw *bdevsw0[255]; 88 const struct bdevsw **bdevsw = bdevsw0; 89 const int sys_cdevsws = 255; 90 int max_cdevsws = 255; 91 92 const struct cdevsw *cdevsw0[255]; 93 const struct cdevsw **cdevsw = cdevsw0; 94 const int sys_bdevsws = 255; 95 int max_bdevsws = 255; 96 97 int mem_no = 2; 98 99 device_t booted_device; 100 device_t booted_wedge; 101 int booted_partition; 102 103 /* XXX: unused */ 104 kmutex_t tty_lock; 105 krwlock_t exec_lock; 106 107 struct lwplist alllwp = LIST_HEAD_INITIALIZER(alllwp); 108 109 /* sparc doesn't sport constant page size, pretend we have 4k pages */ 110 #ifdef __sparc__ 111 int nbpg = 4096; 112 int pgofset = 4096-1; 113 int pgshift = 12; 114 #endif 115 116 /* on sun3 VM_MAX_ADDRESS is a const variable */ 117 /* XXX: should be moved into rump.c and initialize for sun3 and sun3x? */ 118 #ifdef sun3 119 const vaddr_t kernbase = KERNBASE3; 120 #endif 121 122 struct loadavg averunnable = { 123 { 0 * FSCALE, 124 1 * FSCALE, 125 11 * FSCALE, }, 126 FSCALE, 127 }; 128 129 struct emul emul_netbsd = { 130 .e_name = "netbsd-rump", 131 .e_sysent = rump_sysent, 132 #ifndef __HAVE_MINIMAL_EMUL 133 .e_nsysent = SYS_NSYSENT, 134 #endif 135 .e_vm_default_addr = uvm_default_mapaddr, 136 #ifdef __HAVE_SYSCALL_INTERN 137 .e_syscall_intern = syscall_intern, 138 #endif 139 }; 140 141 u_int nprocs = 1; 142 143 int 144 kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx) 145 { 146 extern int hz; 147 int rv; 148 uint64_t sec, nsec; 149 150 if (mtx) 151 mutex_exit(mtx); 152 153 sec = timeo / hz; 154 nsec = (timeo % hz) * (1000000000 / hz); 155 rv = rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL, sec, nsec); 156 KASSERT(rv == 0); 157 158 if (mtx) 159 mutex_enter(mtx); 160 161 return 0; 162 } 163 164 void 165 lwp_unsleep(lwp_t *l, bool cleanup) 166 { 167 168 KASSERT(mutex_owned(l->l_mutex)); 169 170 (*l->l_syncobj->sobj_unsleep)(l, cleanup); 171 } 172 173 void 174 lwp_update_creds(struct lwp *l) 175 { 176 struct proc *p; 177 kauth_cred_t oldcred; 178 179 p = l->l_proc; 180 oldcred = l->l_cred; 181 l->l_prflag &= ~LPR_CRMOD; 182 183 mutex_enter(p->p_lock); 184 kauth_cred_hold(p->p_cred); 185 l->l_cred = p->p_cred; 186 mutex_exit(p->p_lock); 187 188 if (oldcred != NULL) 189 kauth_cred_free(oldcred); 190 } 191 192 vaddr_t 193 calc_cache_size(vsize_t vasz, int pct, int va_pct) 194 { 195 paddr_t t; 196 197 t = (paddr_t)physmem * pct / 100 * PAGE_SIZE; 198 if ((vaddr_t)t != t) { 199 panic("%s: needs tweak", __func__); 200 } 201 return t; 202 } 203 204 void 205 assert_sleepable(void) 206 { 207 208 /* always sleepable, although we should improve this */ 209 } 210 211 void 212 module_init_md(void) 213 { 214 215 /* 216 * Nothing for now. However, we should load the librump 217 * symbol table. 218 */ 219 } 220 221 /* us and them, after all we're only ordinary seconds */ 222 static void 223 rump_delay(unsigned int us) 224 { 225 uint64_t sec, nsec; 226 227 sec = us / 1000000; 228 nsec = (us % 1000000) * 1000; 229 230 if (__predict_false(sec != 0)) 231 printf("WARNING: over 1s delay\n"); 232 233 rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL, sec, nsec); 234 } 235 void (*delay_func)(unsigned int) = rump_delay; 236 237 /* 238 * Provide weak aliases for tty routines used by printf. 239 * They will be used unless the rumpkern_tty component is present. 240 */ 241 242 int rump_ttycheckoutq(struct tty *, int); 243 int 244 rump_ttycheckoutq(struct tty *tp, int wait) 245 { 246 247 return 1; 248 } 249 __weak_alias(ttycheckoutq,rump_ttycheckoutq); 250 251 int rump_tputchar(int, int, struct tty *); 252 int 253 rump_tputchar(int c, int flags, struct tty *tp) 254 { 255 256 cnputc(c); 257 return 0; 258 } 259 __weak_alias(tputchar,rump_tputchar); 260 261 void 262 cnputc(int c) 263 { 264 265 rumpuser_putchar(c); 266 } 267 268 void 269 cnflush(void) 270 { 271 272 /* done */ 273 } 274 275 #ifdef __HAVE_SYSCALL_INTERN 276 void 277 syscall_intern(struct proc *p) 278 { 279 280 p->p_emuldata = NULL; 281 } 282 #endif 283 284 #ifdef LOCKDEBUG 285 void 286 turnstile_print(volatile void *obj, void (*pr)(const char *, ...)) 287 { 288 289 /* nada */ 290 } 291 #endif 292