/* $OpenBSD: OSFpal.c,v 1.9 2023/01/16 07:29:32 deraadt Exp $ */
/* $NetBSD: OSFpal.c,v 1.8 2001/07/22 15:17:30 wiz Exp $ */

/*
 * Copyright (c) 1994, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Keith Bostic
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/types.h>
#include <lib/libsa/stand.h>

#include <machine/prom.h>
#include <machine/rpb.h>
#include <machine/alpha_cpu.h>

paddr_t ptbr_save;

void switch_palcode(void);

void
OSFpal()
{
        struct rpb *r;
        struct pcs *p;

        r = (struct rpb *)HWRPB_ADDR;
        /*
         * Note, cpu_number() is a VMS op, can't necessarily call it.
         * Real fun: PAL_VMS_mfpr_whami == PAL_OSF1_rti...
         * We might not be rpb_primary_cpu_id, but it is supposed to go
         * first so the answer should apply to everyone.
         */
        p = LOCATE_PCS(r, r->rpb_primary_cpu_id);

        printf("VMS PAL rev: 0x%lx\n", p->pcs_palrevisions[PALvar_OpenVMS]);
        printf("OSF PAL rev: 0x%lx\n", p->pcs_palrevisions[PALvar_OSF1]);

        if(p->pcs_pal_type==PAL_TYPE_OSF1) {
                printf("OSF PAL code already running.\n");
                ptbr_save = ((struct alpha_pcb *)p)->apcb_ptbr;
                printf("PTBR is:          0x%lx\n", ptbr_save);
                return;
        }
        switch_palcode();
        memcpy(&p->pcs_pal_rev, &p->pcs_palrevisions[PALvar_OSF1],
            sizeof(p->pcs_pal_rev));
        printf("Switch to OSF PAL code succeeded.\n");
}