/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/archsystm.h>
#include <sys/machsystm.h>
#include <sys/promimpl.h>
#include <sys/prom_plat.h>
#include <sys/cpu_sgnblk_defs.h>
#include <sys/kdi_machimpl.h>
#ifdef TRAPTRACE
#include <sys/traptrace.h>
#endif /* TRAPTRACE */
extern void audit_enterprom();
extern void audit_exitprom();
/*
* Platforms that use CPU signatures need to set cpu_sgn_func
* to point to a platform specific function. This needs to
* be done in set_platform_defaults() within the platmod.
*/
/*
* abort_seq_handler required by sysctrl.
*/
void debug_enter(char *);
/*
* Platform tunable to disable the h/w watchdog timer.
*/
extern void clear_watchdog_on_exit(void);
/*
* On sun4u platform, abort_sequence_enter() can be called at high PIL
* and we can't afford to acquire any adaptive mutex or use any
* condition variables as we are not allowed to sleep while running
* on interrupt stack. We work around this problem by posting a level
* 10 soft interrupt and then invoking the "abort_seq_handler" within
* that soft interrupt context.
*
* This has the side effect of not allowing us to drop into debugger
* when the kernel is stuck at high PIL (PIL > 10). It's better to
* be able to break into a hung system even if it means crashing the
* system. If a user presses L1-A more than once within a 15 seconds
* window, and the previous L1-A soft interrupt is still pending, then
* we directly invoke the abort_sequence_enter.
*
* Since the "msg" argument passed to abort_sequence_enter can refer
* to a message anywhere in memory, including stack, it's copied into
* abort_seq_msgbuf buffer for processing by the soft interrupt.
*/
/*ARGSUSED0*/
static uint_t
{
char *msg;
if (abort_seq_msglen > 0) {
} else
abort_seq_tstamp = 0LL;
if (auditing)
audit_enterprom(1);
(*abort_seq_handler)(msg);
if (auditing)
audit_exitprom(1);
} else {
if (auditing)
audit_enterprom(0);
}
return (1);
}
void
abort_sequence_init(void)
{
abort_seq_tstamp = 0LL;
if (abort_seq_inum == 0)
}
/*
* Machine dependent abort sequence handling
*/
void
{
int s, on_intr;
if (abort_enable != 0) {
s = splhi();
splx(s);
/*
* PIL > LOCK_LEVEL, then we post a softint and invoke
* abort_seq_handler from there as we can't afford to
* acquire any adaptive mutex here. However, if we
* already have a pending softint, which was posted
* within FORCE_ABORT_SEQ_INTERVAL duration, then we
* bypass softint approach as our softint may be blocked
* and the user really wants to drop into the debugger.
*/
if (on_intr && abort_seq_inum != 0 &&
if (msglen >= ABORT_SEQ_MSGBUFSZ)
} else
abort_seq_msglen = 0;
} else {
/*
* Ignore any pending abort sequence softint
* as we are invoking the abort_seq_handler
* here.
*/
abort_seq_tstamp = 0LL;
audit_enterprom(1);
(*abort_seq_handler)(msg);
audit_exitprom(1);
}
} else {
if (auditing)
audit_enterprom(0);
}
}
/*
* Enter debugger. Called when the user types L1-A or break or whenever
* code wants to enter the debugger and possibly resume later.
* If the debugger isn't present, enter the PROM monitor.
*
* If console is a framebuffer which is powered off, it will be powered up
* before jumping to the debugger. If we are called above lock level, a
* softint is triggered to reenter this code and allow the fb to be powered
* up as in the less than lock level case. If this code is entered at greater
* than lock level and the fb is not already powered up, the msg argument
* will not be displayed.
*/
void
{
int s;
extern void pm_cfb_powerup(void);
extern void pm_cfb_rele(void);
extern void pm_cfb_trigger(void);
extern int pm_cfb_check_and_hold(void);
/*
* For platforms that use CPU signatures, update the signature
* to indicate that we are entering the debugger if we are in
* the middle of a panic flow.
*/
if (panicstr)
if (!panicstr)
(void) callb_execute_class(CB_CL_ENTER_DEBUGGER, 0);
if (pm_cfb_check_and_hold())
if (getpil() > LOCK_LEVEL) {
return;
} else
if (msg)
s = splzs();
kmdb_enter();
else
splx(s);
pm_cfb_rele();
if (!panicstr)
if (panicstr)
}
/*
* Halt the machine and return to the monitor
*/
void
halt(char *s)
{
stop_other_cpus(); /* send stop signal to other CPUs */
if (s)
prom_printf("(%s) ", s);
/*
* For Platforms that use CPU signatures, we
* need to set the signature block to OS and
* the state to exiting for all the processors.
*/
/*NOTREACHED*/
}
/*
* Halt the machine and power off the system.
*/
void
power_down(const char *s)
{
stop_other_cpus(); /* send stop signal to other CPUs */
if (s != NULL)
prom_printf("(%s) ", s);
/*
* For platforms that use CPU signatures, we need to set up the
* signature blocks to indicate that we have an environmental
* interrupt request to power down, and then exit to the prom monitor.
*/
/*
* If here is reached, for some reason prom's power-off command failed.
* Prom should have already printed out error messages. Exit to
* firmware.
*/
/*NOTREACHED*/
}
void
do_shutdown(void)
{
/*
* If we're still booting and init(1) isn't set up yet, simply halt.
*/
extern void halt(char *);
}
/*
* else, graceful shutdown with inittab and all getting involved
*/
}