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emul.c revision 1.161 
      1 /*	$NetBSD: emul.c,v 1.161 2014/01/17 01:32:53 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 1.161 2014/01/17 01:32:53 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 #include <sys/cprng.h>
     56 
     57 #include <dev/cons.h>
     58 
     59 #include <rump/rumpuser.h>
     60 
     61 #include <uvm/uvm_map.h>
     62 
     63 #include "rump_private.h"
     64 
     65 /*
     66  * physmem is largely unused (except for nmbcluster calculations),
     67  * so pick a default value which suits ZFS.  if an application wants
     68  * a very small memory footprint, it can still adjust this before
     69  * calling rump_init()
     70  */
     71 #define PHYSMEM 512*256
     72 int physmem = PHYSMEM;
     73 int nkmempages = PHYSMEM/2; /* from le chapeau */
     74 #undef PHYSMEM
     75 
     76 struct lwp lwp0;
     77 struct vnode *rootvp;
     78 dev_t rootdev = NODEV;
     79 
     80 const int schedppq = 1;
     81 int hardclock_ticks;
     82 bool mp_online = false;
     83 struct timeval boottime;
     84 int cold = 1;
     85 int boothowto = AB_SILENT;
     86 struct tty *constty;
     87 
     88 const struct bdevsw *bdevsw0[255];
     89 const struct bdevsw **bdevsw = bdevsw0;
     90 const int sys_cdevsws = 255;
     91 int max_cdevsws = 255;
     92 
     93 const struct cdevsw *cdevsw0[255];
     94 const struct cdevsw **cdevsw = cdevsw0;
     95 const int sys_bdevsws = 255;
     96 int max_bdevsws = 255;
     97 
     98 int mem_no = 2;
     99 
    100 device_t booted_device;
    101 device_t booted_wedge;
    102 int booted_partition;
    103 
    104 /* XXX: unused */
    105 kmutex_t tty_lock;
    106 krwlock_t exec_lock;
    107 
    108 struct lwplist alllwp = LIST_HEAD_INITIALIZER(alllwp);
    109 
    110 /* sparc doesn't sport constant page size, pretend we have 4k pages */
    111 #ifdef __sparc__
    112 int nbpg = 4096;
    113 int pgofset = 4096-1;
    114 int pgshift = 12;
    115 #endif
    116 
    117 /* on sun3 VM_MAX_ADDRESS is a const variable */
    118 /* XXX: should be moved into rump.c and initialize for sun3 and sun3x? */
    119 #ifdef sun3
    120 const vaddr_t kernbase = KERNBASE3;
    121 #endif
    122 
    123 struct loadavg averunnable = {
    124 	{ 0 * FSCALE,
    125 	  1 * FSCALE,
    126 	  11 * FSCALE, },
    127 	FSCALE,
    128 };
    129 
    130 struct emul emul_netbsd = {
    131 	.e_name = "netbsd-rump",
    132 	.e_sysent = rump_sysent,
    133 #ifndef __HAVE_MINIMAL_EMUL
    134 	.e_nsysent = SYS_NSYSENT,
    135 #endif
    136 	.e_vm_default_addr = uvm_default_mapaddr,
    137 #ifdef __HAVE_SYSCALL_INTERN
    138 	.e_syscall_intern = syscall_intern,
    139 #endif
    140 };
    141 
    142 u_int nprocs = 1;
    143 
    144 cprng_strong_t *kern_cprng;
    145 
    146 int
    147 kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx)
    148 {
    149 	extern int hz;
    150 	int rv;
    151 	uint64_t sec, nsec;
    152 
    153 	if (mtx)
    154 		mutex_exit(mtx);
    155 
    156 	sec = timeo / hz;
    157 	nsec = (timeo % hz) * (1000000000 / hz);
    158 	rv = rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL, sec, nsec);
    159 	KASSERT(rv == 0);
    160 
    161 	if (mtx)
    162 		mutex_enter(mtx);
    163 
    164 	return 0;
    165 }
    166 
    167 void
    168 lwp_unsleep(lwp_t *l, bool cleanup)
    169 {
    170 
    171 	KASSERT(mutex_owned(l->l_mutex));
    172 
    173 	(*l->l_syncobj->sobj_unsleep)(l, cleanup);
    174 }
    175 
    176 void
    177 lwp_update_creds(struct lwp *l)
    178 {
    179 	struct proc *p;
    180 	kauth_cred_t oldcred;
    181 
    182 	p = l->l_proc;
    183 	oldcred = l->l_cred;
    184 	l->l_prflag &= ~LPR_CRMOD;
    185 
    186 	mutex_enter(p->p_lock);
    187 	kauth_cred_hold(p->p_cred);
    188 	l->l_cred = p->p_cred;
    189 	mutex_exit(p->p_lock);
    190 
    191 	if (oldcred != NULL)
    192 		kauth_cred_free(oldcred);
    193 }
    194 
    195 vaddr_t
    196 calc_cache_size(vsize_t vasz, int pct, int va_pct)
    197 {
    198 	paddr_t t;
    199 
    200 	t = (paddr_t)physmem * pct / 100 * PAGE_SIZE;
    201 	if ((vaddr_t)t != t) {
    202 		panic("%s: needs tweak", __func__);
    203 	}
    204 	return t;
    205 }
    206 
    207 void
    208 assert_sleepable(void)
    209 {
    210 
    211 	/* always sleepable, although we should improve this */
    212 }
    213 
    214 void
    215 module_init_md(void)
    216 {
    217 
    218 	/*
    219 	 * Nothing for now.  However, we should load the librump
    220 	 * symbol table.
    221 	 */
    222 }
    223 
    224 /* us and them, after all we're only ordinary seconds */
    225 static void
    226 rump_delay(unsigned int us)
    227 {
    228 	uint64_t sec, nsec;
    229 
    230 	sec = us / 1000000;
    231 	nsec = (us % 1000000) * 1000;
    232 
    233 	if (__predict_false(sec != 0))
    234 		printf("WARNING: over 1s delay\n");
    235 
    236 	rumpuser_clock_sleep(RUMPUSER_CLOCK_RELWALL, sec, nsec);
    237 }
    238 void (*delay_func)(unsigned int) = rump_delay;
    239 
    240 /*
    241  * Provide weak aliases for tty routines used by printf.
    242  * They will be used unless the rumpkern_tty component is present.
    243  */
    244 
    245 int rump_ttycheckoutq(struct tty *, int);
    246 int
    247 rump_ttycheckoutq(struct tty *tp, int wait)
    248 {
    249 
    250 	return 1;
    251 }
    252 __weak_alias(ttycheckoutq,rump_ttycheckoutq);
    253 
    254 int rump_tputchar(int, int, struct tty *);
    255 int
    256 rump_tputchar(int c, int flags, struct tty *tp)
    257 {
    258 
    259 	cnputc(c);
    260 	return 0;
    261 }
    262 __weak_alias(tputchar,rump_tputchar);
    263 
    264 void
    265 cnputc(int c)
    266 {
    267 
    268 	rumpuser_putchar(c);
    269 }
    270 
    271 void
    272 cnflush(void)
    273 {
    274 
    275 	/* done */
    276 }
    277 
    278 #ifdef __HAVE_SYSCALL_INTERN
    279 void
    280 syscall_intern(struct proc *p)
    281 {
    282 
    283 	p->p_emuldata = NULL;
    284 }
    285 #endif
    286 
    287 #ifdef LOCKDEBUG
    288 void
    289 turnstile_print(volatile void *obj, void (*pr)(const char *, ...))
    290 {
    291 
    292 	/* nada */
    293 }
    294 #endif
    295