1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <sys/reboot.h> 30*0Sstevel@tonic-gate #include <sys/systm.h> 31*0Sstevel@tonic-gate #include <sys/archsystm.h> 32*0Sstevel@tonic-gate #include <sys/machsystm.h> 33*0Sstevel@tonic-gate #include <sys/promif.h> 34*0Sstevel@tonic-gate #include <sys/promimpl.h> 35*0Sstevel@tonic-gate #include <sys/prom_plat.h> 36*0Sstevel@tonic-gate #include <sys/cpu_sgnblk_defs.h> 37*0Sstevel@tonic-gate #include <sys/ivintr.h> 38*0Sstevel@tonic-gate #include <sys/kdi.h> 39*0Sstevel@tonic-gate #include <sys/callb.h> 40*0Sstevel@tonic-gate 41*0Sstevel@tonic-gate #ifdef TRAPTRACE 42*0Sstevel@tonic-gate #include <sys/traptrace.h> 43*0Sstevel@tonic-gate #endif /* TRAPTRACE */ 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate #ifdef C2_AUDIT 46*0Sstevel@tonic-gate extern void audit_enterprom(); 47*0Sstevel@tonic-gate extern void audit_exitprom(); 48*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate /* 51*0Sstevel@tonic-gate * Platforms that use CPU signatures need to set cpu_sgn_func 52*0Sstevel@tonic-gate * to point to a platform specific function. This needs to 53*0Sstevel@tonic-gate * be done in set_platform_defaults() within the platmod. 54*0Sstevel@tonic-gate */ 55*0Sstevel@tonic-gate void (*cpu_sgn_func)(ushort_t, uchar_t, uchar_t, int) = NULL; 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate /* 58*0Sstevel@tonic-gate * abort_seq_handler required by sysctrl. 59*0Sstevel@tonic-gate */ 60*0Sstevel@tonic-gate void debug_enter(char *); 61*0Sstevel@tonic-gate void (*abort_seq_handler)(char *) = debug_enter; 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* 64*0Sstevel@tonic-gate * Platform tunable to disable the h/w watchdog timer. 65*0Sstevel@tonic-gate */ 66*0Sstevel@tonic-gate int disable_watchdog_on_exit = 0; 67*0Sstevel@tonic-gate extern void clear_watchdog_on_exit(void); 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate /* 71*0Sstevel@tonic-gate * On sun4u platform, abort_sequence_enter() can be called at high PIL 72*0Sstevel@tonic-gate * and we can't afford to acquire any adaptive mutex or use any 73*0Sstevel@tonic-gate * condition variables as we are not allowed to sleep while running 74*0Sstevel@tonic-gate * on interrupt stack. We work around this problem by posting a level 75*0Sstevel@tonic-gate * 10 soft interrupt and then invoking the "abort_seq_handler" within 76*0Sstevel@tonic-gate * that soft interrupt context. 77*0Sstevel@tonic-gate * 78*0Sstevel@tonic-gate * This has the side effect of not allowing us to drop into debugger 79*0Sstevel@tonic-gate * when the kernel is stuck at high PIL (PIL > 10). It's better to 80*0Sstevel@tonic-gate * be able to break into a hung system even if it means crashing the 81*0Sstevel@tonic-gate * system. If a user presses L1-A more than once within a 15 seconds 82*0Sstevel@tonic-gate * window, and the previous L1-A soft interrupt is still pending, then 83*0Sstevel@tonic-gate * we directly invoke the abort_sequence_enter. 84*0Sstevel@tonic-gate * 85*0Sstevel@tonic-gate * Since the "msg" argument passed to abort_sequence_enter can refer 86*0Sstevel@tonic-gate * to a message anywhere in memory, including stack, it's copied into 87*0Sstevel@tonic-gate * abort_seq_msgbuf buffer for processing by the soft interrupt. 88*0Sstevel@tonic-gate */ 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate #define ABORT_SEQ_MSGBUFSZ 256 91*0Sstevel@tonic-gate #define FORCE_ABORT_SEQ_INTERVAL ((hrtime_t)15 * NANOSEC) 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate static kmutex_t abort_seq_lock; 94*0Sstevel@tonic-gate static uint_t abort_seq_inum; /* abort seq softintr # */ 95*0Sstevel@tonic-gate static hrtime_t abort_seq_tstamp; /* hrtime of last abort seq */ 96*0Sstevel@tonic-gate static size_t abort_seq_msglen; /* abort seq message length */ 97*0Sstevel@tonic-gate static char abort_seq_msgbuf[ABORT_SEQ_MSGBUFSZ]; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate /*ARGSUSED0*/ 100*0Sstevel@tonic-gate static uint_t 101*0Sstevel@tonic-gate abort_seq_softintr(caddr_t arg) 102*0Sstevel@tonic-gate { 103*0Sstevel@tonic-gate char *msg; 104*0Sstevel@tonic-gate char msgbuf[ABORT_SEQ_MSGBUFSZ]; 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate mutex_enter(&abort_seq_lock); 107*0Sstevel@tonic-gate if (abort_enable != 0 && abort_seq_tstamp != 0LL) { 108*0Sstevel@tonic-gate if (abort_seq_msglen > 0) { 109*0Sstevel@tonic-gate bcopy(abort_seq_msgbuf, msgbuf, abort_seq_msglen); 110*0Sstevel@tonic-gate msg = msgbuf; 111*0Sstevel@tonic-gate } else 112*0Sstevel@tonic-gate msg = NULL; 113*0Sstevel@tonic-gate abort_seq_tstamp = 0LL; 114*0Sstevel@tonic-gate mutex_exit(&abort_seq_lock); 115*0Sstevel@tonic-gate #ifdef C2_AUDIT 116*0Sstevel@tonic-gate if (audit_active) 117*0Sstevel@tonic-gate audit_enterprom(1); 118*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 119*0Sstevel@tonic-gate (*abort_seq_handler)(msg); 120*0Sstevel@tonic-gate #ifdef C2_AUDIT 121*0Sstevel@tonic-gate if (audit_active) 122*0Sstevel@tonic-gate audit_exitprom(1); 123*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 124*0Sstevel@tonic-gate } else { 125*0Sstevel@tonic-gate mutex_exit(&abort_seq_lock); 126*0Sstevel@tonic-gate #ifdef C2_AUDIT 127*0Sstevel@tonic-gate if (audit_active) 128*0Sstevel@tonic-gate audit_enterprom(0); 129*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate return (1); 132*0Sstevel@tonic-gate } 133*0Sstevel@tonic-gate 134*0Sstevel@tonic-gate void 135*0Sstevel@tonic-gate abort_sequence_init(void) 136*0Sstevel@tonic-gate { 137*0Sstevel@tonic-gate mutex_init(&abort_seq_lock, NULL, MUTEX_SPIN, (void *)PIL_12); 138*0Sstevel@tonic-gate abort_seq_tstamp = 0LL; 139*0Sstevel@tonic-gate if (abort_seq_inum == 0) 140*0Sstevel@tonic-gate abort_seq_inum = add_softintr(LOCK_LEVEL, 141*0Sstevel@tonic-gate (softintrfunc)abort_seq_softintr, NULL); 142*0Sstevel@tonic-gate } 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate /* 145*0Sstevel@tonic-gate * Machine dependent abort sequence handling 146*0Sstevel@tonic-gate */ 147*0Sstevel@tonic-gate void 148*0Sstevel@tonic-gate abort_sequence_enter(char *msg) 149*0Sstevel@tonic-gate { 150*0Sstevel@tonic-gate int s, on_intr; 151*0Sstevel@tonic-gate size_t msglen; 152*0Sstevel@tonic-gate hrtime_t tstamp; 153*0Sstevel@tonic-gate 154*0Sstevel@tonic-gate if (abort_enable != 0) { 155*0Sstevel@tonic-gate s = splhi(); 156*0Sstevel@tonic-gate on_intr = CPU_ON_INTR(CPU) || (spltoipl(s) > LOCK_LEVEL); 157*0Sstevel@tonic-gate splx(s); 158*0Sstevel@tonic-gate 159*0Sstevel@tonic-gate tstamp = gethrtime(); 160*0Sstevel@tonic-gate mutex_enter(&abort_seq_lock); 161*0Sstevel@tonic-gate 162*0Sstevel@tonic-gate /* 163*0Sstevel@tonic-gate * If we are on an interrupt stack and/or running at 164*0Sstevel@tonic-gate * PIL > LOCK_LEVEL, then we post a softint and invoke 165*0Sstevel@tonic-gate * abort_seq_handler from there as we can't afford to 166*0Sstevel@tonic-gate * acquire any adaptive mutex here. However, if we 167*0Sstevel@tonic-gate * already have a pending softint, which was posted 168*0Sstevel@tonic-gate * within FORCE_ABORT_SEQ_INTERVAL duration, then we 169*0Sstevel@tonic-gate * bypass softint approach as our softint may be blocked 170*0Sstevel@tonic-gate * and the user really wants to drop into the debugger. 171*0Sstevel@tonic-gate */ 172*0Sstevel@tonic-gate if (on_intr && abort_seq_inum != 0 && 173*0Sstevel@tonic-gate (abort_seq_tstamp == 0LL || tstamp > 174*0Sstevel@tonic-gate (abort_seq_tstamp + FORCE_ABORT_SEQ_INTERVAL))) { 175*0Sstevel@tonic-gate abort_seq_tstamp = tstamp; 176*0Sstevel@tonic-gate if (msg != NULL) { 177*0Sstevel@tonic-gate msglen = strlen(msg); 178*0Sstevel@tonic-gate if (msglen >= ABORT_SEQ_MSGBUFSZ) 179*0Sstevel@tonic-gate msglen = ABORT_SEQ_MSGBUFSZ - 1; 180*0Sstevel@tonic-gate bcopy(msg, abort_seq_msgbuf, msglen); 181*0Sstevel@tonic-gate abort_seq_msgbuf[msglen] = '\0'; 182*0Sstevel@tonic-gate abort_seq_msglen = msglen + 1; 183*0Sstevel@tonic-gate } else 184*0Sstevel@tonic-gate abort_seq_msglen = 0; 185*0Sstevel@tonic-gate mutex_exit(&abort_seq_lock); 186*0Sstevel@tonic-gate setsoftint(abort_seq_inum); 187*0Sstevel@tonic-gate } else { 188*0Sstevel@tonic-gate /* 189*0Sstevel@tonic-gate * Ignore any pending abort sequence softint 190*0Sstevel@tonic-gate * as we are invoking the abort_seq_handler 191*0Sstevel@tonic-gate * here. 192*0Sstevel@tonic-gate */ 193*0Sstevel@tonic-gate abort_seq_tstamp = 0LL; 194*0Sstevel@tonic-gate mutex_exit(&abort_seq_lock); 195*0Sstevel@tonic-gate #ifdef C2_AUDIT 196*0Sstevel@tonic-gate if (!on_intr && audit_active) 197*0Sstevel@tonic-gate audit_enterprom(1); 198*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 199*0Sstevel@tonic-gate (*abort_seq_handler)(msg); 200*0Sstevel@tonic-gate #ifdef C2_AUDIT 201*0Sstevel@tonic-gate if (!on_intr && audit_active) 202*0Sstevel@tonic-gate audit_exitprom(1); 203*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 204*0Sstevel@tonic-gate } 205*0Sstevel@tonic-gate } else { 206*0Sstevel@tonic-gate #ifdef C2_AUDIT 207*0Sstevel@tonic-gate if (audit_active) 208*0Sstevel@tonic-gate audit_enterprom(0); 209*0Sstevel@tonic-gate #endif /* C2_AUDIT */ 210*0Sstevel@tonic-gate } 211*0Sstevel@tonic-gate } 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate /* 214*0Sstevel@tonic-gate * Enter debugger. Called when the user types L1-A or break or whenever 215*0Sstevel@tonic-gate * code wants to enter the debugger and possibly resume later. 216*0Sstevel@tonic-gate * If the debugger isn't present, enter the PROM monitor. 217*0Sstevel@tonic-gate * 218*0Sstevel@tonic-gate * If console is a framebuffer which is powered off, it will be powered up 219*0Sstevel@tonic-gate * before jumping to the debugger. If we are called above lock level, a 220*0Sstevel@tonic-gate * softint is triggered to reenter this code and allow the fb to be powered 221*0Sstevel@tonic-gate * up as in the less than lock level case. If this code is entered at greater 222*0Sstevel@tonic-gate * than lock level and the fb is not already powered up, the msg argument 223*0Sstevel@tonic-gate * will not be displayed. 224*0Sstevel@tonic-gate */ 225*0Sstevel@tonic-gate void 226*0Sstevel@tonic-gate debug_enter(char *msg) 227*0Sstevel@tonic-gate { 228*0Sstevel@tonic-gate label_t old_pcb; 229*0Sstevel@tonic-gate int s; 230*0Sstevel@tonic-gate extern void pm_cfb_powerup(void); 231*0Sstevel@tonic-gate extern void pm_cfb_rele(void); 232*0Sstevel@tonic-gate extern void pm_cfb_trigger(void); 233*0Sstevel@tonic-gate extern int pm_cfb_check_and_hold(void); 234*0Sstevel@tonic-gate 235*0Sstevel@tonic-gate /* 236*0Sstevel@tonic-gate * For platforms that use CPU signatures, update the signature 237*0Sstevel@tonic-gate * to indicate that we are entering the debugger if we are in 238*0Sstevel@tonic-gate * the middle of a panic flow. 239*0Sstevel@tonic-gate */ 240*0Sstevel@tonic-gate if (panicstr) 241*0Sstevel@tonic-gate CPU_SIGNATURE(OS_SIG, SIGST_EXIT, SIGSUBST_DEBUG, -1); 242*0Sstevel@tonic-gate 243*0Sstevel@tonic-gate if (!panicstr) 244*0Sstevel@tonic-gate (void) callb_execute_class(CB_CL_ENTER_DEBUGGER, 0); 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate if (pm_cfb_check_and_hold()) 247*0Sstevel@tonic-gate if (getpil() > LOCK_LEVEL) { 248*0Sstevel@tonic-gate pm_cfb_trigger(); 249*0Sstevel@tonic-gate return; 250*0Sstevel@tonic-gate } else 251*0Sstevel@tonic-gate pm_cfb_powerup(); 252*0Sstevel@tonic-gate if (msg) 253*0Sstevel@tonic-gate prom_printf("%s\n", msg); 254*0Sstevel@tonic-gate 255*0Sstevel@tonic-gate clear_watchdog_on_exit(); 256*0Sstevel@tonic-gate 257*0Sstevel@tonic-gate if ((s = getpil()) < ipltospl(12)) 258*0Sstevel@tonic-gate s = splzs(); 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate old_pcb = curthread->t_pcb; 261*0Sstevel@tonic-gate (void) setjmp(&curthread->t_pcb); 262*0Sstevel@tonic-gate 263*0Sstevel@tonic-gate if (boothowto & RB_DEBUG) 264*0Sstevel@tonic-gate kdi_dvec_enter(); 265*0Sstevel@tonic-gate else 266*0Sstevel@tonic-gate prom_enter_mon(); 267*0Sstevel@tonic-gate 268*0Sstevel@tonic-gate curthread->t_pcb = old_pcb; 269*0Sstevel@tonic-gate splx(s); 270*0Sstevel@tonic-gate pm_cfb_rele(); 271*0Sstevel@tonic-gate 272*0Sstevel@tonic-gate if (!panicstr) 273*0Sstevel@tonic-gate (void) callb_execute_class(CB_CL_ENTER_DEBUGGER, 1); 274*0Sstevel@tonic-gate 275*0Sstevel@tonic-gate if (panicstr) 276*0Sstevel@tonic-gate CPU_SIGNATURE(OS_SIG, SIGST_EXIT, SIGSUBST_PANIC_CONT, -1); 277*0Sstevel@tonic-gate } 278*0Sstevel@tonic-gate 279*0Sstevel@tonic-gate /* 280*0Sstevel@tonic-gate * Halt the machine and return to the monitor 281*0Sstevel@tonic-gate */ 282*0Sstevel@tonic-gate void 283*0Sstevel@tonic-gate halt(char *s) 284*0Sstevel@tonic-gate { 285*0Sstevel@tonic-gate flush_windows(); 286*0Sstevel@tonic-gate stop_other_cpus(); /* send stop signal to other CPUs */ 287*0Sstevel@tonic-gate 288*0Sstevel@tonic-gate if (s) 289*0Sstevel@tonic-gate prom_printf("(%s) ", s); 290*0Sstevel@tonic-gate 291*0Sstevel@tonic-gate /* 292*0Sstevel@tonic-gate * For Platforms that use CPU signatures, we 293*0Sstevel@tonic-gate * need to set the signature block to OS and 294*0Sstevel@tonic-gate * the state to exiting for all the processors. 295*0Sstevel@tonic-gate */ 296*0Sstevel@tonic-gate CPU_SIGNATURE(OS_SIG, SIGST_EXIT, SIGSUBST_HALT, -1); 297*0Sstevel@tonic-gate prom_exit_to_mon(); 298*0Sstevel@tonic-gate /*NOTREACHED*/ 299*0Sstevel@tonic-gate } 300*0Sstevel@tonic-gate 301*0Sstevel@tonic-gate /* 302*0Sstevel@tonic-gate * Halt the machine and power off the system. 303*0Sstevel@tonic-gate */ 304*0Sstevel@tonic-gate void 305*0Sstevel@tonic-gate power_down(const char *s) 306*0Sstevel@tonic-gate { 307*0Sstevel@tonic-gate flush_windows(); 308*0Sstevel@tonic-gate stop_other_cpus(); /* send stop signal to other CPUs */ 309*0Sstevel@tonic-gate 310*0Sstevel@tonic-gate if (s != NULL) 311*0Sstevel@tonic-gate prom_printf("(%s) ", s); 312*0Sstevel@tonic-gate 313*0Sstevel@tonic-gate /* 314*0Sstevel@tonic-gate * For platforms that use CPU signatures, we need to set up the 315*0Sstevel@tonic-gate * signature blocks to indicate that we have an environmental 316*0Sstevel@tonic-gate * interrupt request to power down, and then exit to the prom monitor. 317*0Sstevel@tonic-gate */ 318*0Sstevel@tonic-gate CPU_SIGNATURE(OS_SIG, SIGST_EXIT, SIGSUBST_ENVIRON, -1); 319*0Sstevel@tonic-gate prom_power_off(); 320*0Sstevel@tonic-gate /* 321*0Sstevel@tonic-gate * If here is reached, for some reason prom's power-off command failed. 322*0Sstevel@tonic-gate * Prom should have already printed out error messages. Exit to 323*0Sstevel@tonic-gate * firmware. 324*0Sstevel@tonic-gate */ 325*0Sstevel@tonic-gate prom_exit_to_mon(); 326*0Sstevel@tonic-gate /*NOTREACHED*/ 327*0Sstevel@tonic-gate } 328*0Sstevel@tonic-gate 329*0Sstevel@tonic-gate void 330*0Sstevel@tonic-gate do_shutdown(void) 331*0Sstevel@tonic-gate { 332*0Sstevel@tonic-gate proc_t *initpp; 333*0Sstevel@tonic-gate 334*0Sstevel@tonic-gate /* 335*0Sstevel@tonic-gate * If we're still booting and init(1) isn't set up yet, simply halt. 336*0Sstevel@tonic-gate */ 337*0Sstevel@tonic-gate mutex_enter(&pidlock); 338*0Sstevel@tonic-gate initpp = prfind(P_INITPID); 339*0Sstevel@tonic-gate mutex_exit(&pidlock); 340*0Sstevel@tonic-gate if (initpp == NULL) { 341*0Sstevel@tonic-gate extern void halt(char *); 342*0Sstevel@tonic-gate prom_power_off(); 343*0Sstevel@tonic-gate halt("Power off the System"); /* just in case */ 344*0Sstevel@tonic-gate } 345*0Sstevel@tonic-gate 346*0Sstevel@tonic-gate /* 347*0Sstevel@tonic-gate * else, graceful shutdown with inittab and all getting involved 348*0Sstevel@tonic-gate */ 349*0Sstevel@tonic-gate psignal(initpp, SIGPWR); 350*0Sstevel@tonic-gate } 351