sun4v/promif/promif_mon.c

	promif_mon.c revision 1ae0874509b6811fdde1dfd46f0d93fd09867a3f
/*
 * 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
 * or http://www.opensolaris.org/os/licensing.
 * 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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/promif_impl.h>
#include <sys/uadmin.h>
#include <sys/machsystm.h>
#include <sys/hypervisor_api.h>

#ifdef _KMDB

extern int kmdb_dpi_get_master_cpuid(void);
extern void kmdb_dpi_kernpanic(int cpuid);
extern void prom_reboot(char *bootstr);

#define PIL_DECL(p)
#define PIL_SET7(p)
#define PIL_REST(p)

#else

extern int vx_handler(cell_t *argument_array);

#define PIL_DECL(p) int p
#define PIL_SET7(p) (p = spl7())
#define PIL_REST(p) (splx(p))

#endif

#define PROMIF_ENTER    0
#define PROMIF_EXIT 1

#define PROMIF_ISPRINT(c)   (((c) >= ' ') && ((c) <= '~'))

static void promif_mon(int mode);

/*ARGSUSED*/
int
promif_enter_mon(void *p)
{
    PIL_DECL(pil);

    PIL_SET7(pil);

    prom_printf("\n");

#ifdef _KMDB
    promif_mon(PROMIF_ENTER);
#else
    idle_other_cpus();
    promif_mon(PROMIF_ENTER);
    resume_other_cpus();
#endif

    PIL_REST(pil);

    return (0);
}

/*ARGSUSED*/
int
promif_exit_to_mon(void *p)
{
    PIL_DECL(pil);

    PIL_SET7(pil);

    prom_printf("Program terminated\n");

    promif_mon(PROMIF_EXIT);

    PIL_REST(pil);

    return (0);
}

static void
promif_mon(int mode)
{
    char        cmd;
    char        *prompt;
    boolean_t   invalid_option;
#ifdef _KMDB
    static char *exit_prompt  = "r)eboot, h)alt? ";
#else
    char        value[ 8 ]; /* holds "true" or "false" */
    char        *boot_msg;
    static char *null_msg = ".\" \"";
    static char *ignore_msg =
        "cr .\" Ignoring auto-boot? setting for this boot.\" cr";
    static char *exit_prompt  = "r)eboot, o)k prompt, h)alt? ";
#endif
    static char *enter_prompt = "c)ontinue, s)ync, r)eboot, h)alt? ";

    prompt = (mode == PROMIF_EXIT) ? exit_prompt : enter_prompt;

    for (;;) {
        prom_printf("%s", prompt);

        while (hv_cngetchar((uint8_t *)&cmd) != H_EOK)
            ;

        prom_printf("%c\n", cmd);

        invalid_option = B_FALSE;

        switch (cmd) {

        case 'r':
            prom_reboot("");
            break;

        case 'h':
            (void) hv_mach_exit(0);
            ASSERT(0);

            break;

#ifndef _KMDB
        case 'o':
            /*
             * This option gives the user an "ok" prompt after
             * the system reset regardless of the value of
             * auto-boot?  We offer this option because halt(1m)
             * doesn't leave the user at the ok prompt (as it
             * does on non-ldoms systems).  If auto-boot? is
             * true tell user we are overriding the setting
             * for this boot only.
             */
            if (mode == PROMIF_EXIT) {
                bzero(value, sizeof (value));
                (void) promif_stree_getprop(prom_optionsnode(),
                    "auto-boot?", value);
                boot_msg = strcmp(value, "true") ? null_msg :
                    ignore_msg;
                (void) promif_ldom_setprop("reboot-command",
                    boot_msg, strlen(boot_msg) + 1);
                (void) hv_mach_sir();
            } else {
                invalid_option = B_TRUE;
            }
            break;
#endif

        case '\r':
            break;

        case 's':
            if (mode == PROMIF_ENTER) {
#ifdef _KMDB
                kmdb_dpi_kernpanic(kmdb_dpi_get_master_cpuid());
#else
                cell_t arg = p1275_ptr2cell("sync");
                (void) vx_handler(&arg);
#endif
            } else {
                invalid_option = B_TRUE;
            }
            break;

        case 'c':
            if (mode == PROMIF_ENTER) {
                return;
            } else {
                invalid_option = B_TRUE;
            }
            break;

        default:
            invalid_option = B_TRUE;
            break;
        }

        if (invalid_option && PROMIF_ISPRINT(cmd))
            prom_printf("invalid option (%c)\n", cmd);
    }

    _NOTE(NOTREACHED)
}