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emul.c revision 1.151 
      1 /*	$NetBSD: emul.c,v 1.151 2012/10/27 17:18:40 chs 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 1.151 2012/10/27 17:18:40 chs 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/syscallvar.h>
     52 #include <sys/xcall.h>
     53 #include <sys/sleepq.h>
     54 
     55 #include <dev/cons.h>
     56 
     57 #include <rump/rumpuser.h>
     58 
     59 #include <uvm/uvm_map.h>
     60 
     61 #include "rump_private.h"
     62 
     63 /*
     64  * physmem is largely unused (except for nmbcluster calculations),
     65  * so pick a default value which suits ZFS.  if an application wants
     66  * a very small memory footprint, it can still adjust this before
     67  * calling rump_init()
     68  */
     69 #define PHYSMEM 512*256
     70 int physmem = PHYSMEM;
     71 int nkmempages = PHYSMEM/2; /* from le chapeau */
     72 #undef PHYSMEM
     73 
     74 struct lwp lwp0;
     75 struct vnode *rootvp;
     76 dev_t rootdev = NODEV;
     77 
     78 const int schedppq = 1;
     79 int hardclock_ticks;
     80 bool mp_online = false;
     81 struct timeval boottime;
     82 int cold = 1;
     83 int boothowto = AB_SILENT;
     84 struct tty *constty;
     85 
     86 const struct bdevsw *bdevsw0[255];
     87 const struct bdevsw **bdevsw = bdevsw0;
     88 const int sys_cdevsws = 255;
     89 int max_cdevsws = 255;
     90 
     91 const struct cdevsw *cdevsw0[255];
     92 const struct cdevsw **cdevsw = cdevsw0;
     93 const int sys_bdevsws = 255;
     94 int max_bdevsws = 255;
     95 
     96 int mem_no = 2;
     97 
     98 device_t booted_device;
     99 device_t booted_wedge;
    100 int booted_partition;
    101 
    102 /* XXX: unused */
    103 kmutex_t tty_lock;
    104 krwlock_t exec_lock;
    105 
    106 struct lwplist alllwp = LIST_HEAD_INITIALIZER(alllwp);
    107 
    108 /* sparc doesn't sport constant page size, pretend we have 4k pages */
    109 #ifdef __sparc__
    110 int nbpg = 4096;
    111 int pgofset = 4096-1;
    112 int pgshift = 12;
    113 #endif
    114 
    115 /* on sun3 VM_MAX_ADDRESS is a const variable */
    116 /* XXX: should be moved into rump.c and initialize for sun3 and sun3x? */
    117 #ifdef sun3
    118 const vaddr_t kernbase = KERNBASE3;
    119 #endif
    120 
    121 struct loadavg averunnable = {
    122 	{ 0 * FSCALE,
    123 	  1 * FSCALE,
    124 	  11 * FSCALE, },
    125 	FSCALE,
    126 };
    127 
    128 struct emul emul_netbsd = {
    129 	.e_name = "netbsd-rump",
    130 	.e_sysent = rump_sysent,
    131 	.e_vm_default_addr = uvm_default_mapaddr,
    132 #ifdef __HAVE_SYSCALL_INTERN
    133 	.e_syscall_intern = syscall_intern,
    134 #endif
    135 };
    136 
    137 u_int nprocs = 1;
    138 
    139 int
    140 kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx)
    141 {
    142 	extern int hz;
    143 	int rv, error;
    144 	uint64_t sec, nsec;
    145 
    146 	if (mtx)
    147 		mutex_exit(mtx);
    148 
    149 	sec = timeo / hz;
    150 	nsec = (timeo % hz) * (1000000000 / hz);
    151 	rv = rumpuser_nanosleep(&sec, &nsec, &error);
    152 
    153 	if (mtx)
    154 		mutex_enter(mtx);
    155 
    156 	if (rv)
    157 		return error;
    158 
    159 	return 0;
    160 }
    161 
    162 void
    163 lwp_unsleep(lwp_t *l, bool cleanup)
    164 {
    165 
    166 	KASSERT(mutex_owned(l->l_mutex));
    167 
    168 	(*l->l_syncobj->sobj_unsleep)(l, cleanup);
    169 }
    170 
    171 void
    172 lwp_update_creds(struct lwp *l)
    173 {
    174 	struct proc *p;
    175 	kauth_cred_t oldcred;
    176 
    177 	p = l->l_proc;
    178 	oldcred = l->l_cred;
    179 	l->l_prflag &= ~LPR_CRMOD;
    180 
    181 	mutex_enter(p->p_lock);
    182 	kauth_cred_hold(p->p_cred);
    183 	l->l_cred = p->p_cred;
    184 	mutex_exit(p->p_lock);
    185 
    186 	if (oldcred != NULL)
    187 		kauth_cred_free(oldcred);
    188 }
    189 
    190 vaddr_t
    191 calc_cache_size(struct vm_map *map, int pct, int va_pct)
    192 {
    193 	paddr_t t;
    194 
    195 	t = (paddr_t)physmem * pct / 100 * PAGE_SIZE;
    196 	if ((vaddr_t)t != t) {
    197 		panic("%s: needs tweak", __func__);
    198 	}
    199 	return t;
    200 }
    201 
    202 void
    203 assert_sleepable(void)
    204 {
    205 
    206 	/* always sleepable, although we should improve this */
    207 }
    208 
    209 void
    210 module_init_md(void)
    211 {
    212 
    213 	/*
    214 	 * Nothing for now.  However, we should load the librump
    215 	 * symbol table.
    216 	 */
    217 }
    218 
    219 /* us and them, after all we're only ordinary seconds */
    220 static void
    221 rump_delay(unsigned int us)
    222 {
    223 	uint64_t sec, nsec;
    224 	int error;
    225 
    226 	sec = us / 1000000;
    227 	nsec = (us % 1000000) * 1000;
    228 
    229 	if (__predict_false(sec != 0))
    230 		printf("WARNING: over 1s delay\n");
    231 
    232 	rumpuser_nanosleep(&sec, &nsec, &error);
    233 }
    234 void (*delay_func)(unsigned int) = rump_delay;
    235 
    236 /*
    237  * Provide weak aliases for tty routines used by printf.
    238  * They will be used unless the rumpkern_tty component is present.
    239  */
    240 
    241 int rump_ttycheckoutq(struct tty *, int);
    242 int
    243 rump_ttycheckoutq(struct tty *tp, int wait)
    244 {
    245 
    246 	return 1;
    247 }
    248 __weak_alias(ttycheckoutq,rump_ttycheckoutq);
    249 
    250 int rump_tputchar(int, int, struct tty *);
    251 int
    252 rump_tputchar(int c, int flags, struct tty *tp)
    253 {
    254 
    255 	cnputc(c);
    256 	return 0;
    257 }
    258 __weak_alias(tputchar,rump_tputchar);
    259 
    260 void
    261 cnputc(int c)
    262 {
    263 	int error;
    264 
    265 	rumpuser_putchar(c, &error);
    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 	/* no you don't */
    281 }
    282 #endif
    283 
    284 void
    285 xc_send_ipi(struct cpu_info *ci)
    286 {
    287 
    288 	/* I'll think about the implementation if this is ever used */
    289 	panic("not implemented");
    290 }
    291 
    292 int
    293 trace_enter(register_t code, const register_t *args, int narg)
    294 {
    295 
    296 	return 0;
    297 }
    298 
    299 void
    300 trace_exit(register_t code, register_t rval[], int error)
    301 {
    302 
    303 	/* nada */
    304 }
    305 
    306 #ifdef LOCKDEBUG
    307 void
    308 turnstile_print(volatile void *obj, void (*pr)(const char *, ...))
    309 {
    310 
    311 	/* nada */
    312 }
    313 #endif
    314