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emul.c revision 1.123.2.3 
      1 /*	$NetBSD: emul.c,v 1.123.2.3 2011/03/05 20:56:14 rmind Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Development of this software was supported by Google Summer of Code.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: emul.c,v 1.123.2.3 2011/03/05 20:56:14 rmind Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/null.h>
     35 #include <sys/vnode.h>
     36 #include <sys/stat.h>
     37 #include <sys/select.h>
     38 #include <sys/syslog.h>
     39 #include <sys/namei.h>
     40 #include <sys/kauth.h>
     41 #include <sys/conf.h>
     42 #include <sys/device.h>
     43 #include <sys/queue.h>
     44 #include <sys/file.h>
     45 #include <sys/cpu.h>
     46 #include <sys/kmem.h>
     47 #include <sys/poll.h>
     48 #include <sys/timetc.h>
     49 #include <sys/tprintf.h>
     50 #include <sys/module.h>
     51 #include <sys/tty.h>
     52 #include <sys/reboot.h>
     53 #include <sys/syscallvar.h>
     54 #include <sys/xcall.h>
     55 #include <sys/sleepq.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 struct device *booted_device;
    101 struct device *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 	.e_vm_default_addr = uvm_default_mapaddr,
    134 #ifdef __HAVE_SYSCALL_INTERN
    135 	.e_syscall_intern = syscall_intern,
    136 #endif
    137 };
    138 
    139 u_int nprocs = 1;
    140 
    141 int
    142 kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx)
    143 {
    144 	extern int hz;
    145 	int rv, error;
    146 	uint64_t sec, nsec;
    147 
    148 	if (mtx)
    149 		mutex_exit(mtx);
    150 
    151 	sec = timeo / hz;
    152 	nsec = (timeo % hz) * (1000000000 / hz);
    153 	rv = rumpuser_nanosleep(&sec, &nsec, &error);
    154 
    155 	if (mtx)
    156 		mutex_enter(mtx);
    157 
    158 	if (rv)
    159 		return error;
    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(struct vm_map *map, 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 	int error;
    227 
    228 	sec = us / 1000000;
    229 	nsec = (us % 1000000) * 1000;
    230 
    231 	if (__predict_false(sec != 0))
    232 		printf("WARNING: over 1s delay\n");
    233 
    234 	rumpuser_nanosleep(&sec, &nsec, &error);
    235 }
    236 void (*delay_func)(unsigned int) = rump_delay;
    237 
    238 /*
    239  * Provide weak aliases for tty routines used by printf.
    240  * They will be used unless the rumpkern_tty component is present.
    241  */
    242 
    243 int rump_ttycheckoutq(struct tty *, int);
    244 int
    245 rump_ttycheckoutq(struct tty *tp, int wait)
    246 {
    247 
    248 	return 1;
    249 }
    250 __weak_alias(ttycheckoutq,rump_ttycheckoutq);
    251 
    252 int rump_tputchar(int, int, struct tty *);
    253 int
    254 rump_tputchar(int c, int flags, struct tty *tp)
    255 {
    256 
    257 	cnputc(c);
    258 	return 0;
    259 }
    260 __weak_alias(tputchar,rump_tputchar);
    261 
    262 void
    263 cnputc(int c)
    264 {
    265 	int error;
    266 
    267 	rumpuser_putchar(c, &error);
    268 }
    269 
    270 void
    271 cnflush(void)
    272 {
    273 
    274 	/* done */
    275 }
    276 
    277 #ifdef __HAVE_SYSCALL_INTERN
    278 void
    279 syscall_intern(struct proc *p)
    280 {
    281 
    282 	/* no you don't */
    283 }
    284 #endif
    285 
    286 void
    287 xc_send_ipi(struct cpu_info *ci)
    288 {
    289 
    290 	/* I'll think about the implementation if this is ever used */
    291 	panic("not implemented");
    292 }
    293 
    294 int
    295 trace_enter(register_t code, const register_t *args, int narg)
    296 {
    297 
    298 	return 0;
    299 }
    300 
    301 void
    302 trace_exit(register_t code, register_t rval[], int error)
    303 {
    304 
    305 	/* nada */
    306 }
    307 
    308 #ifdef LOCKDEBUG
    309 void
    310 turnstile_print(volatile void *obj, void (*pr)(const char *, ...))
    311 {
    312 
    313 	/* nada */
    314 }
    315 #endif
    316