/*      $OpenBSD: autoconf.c,v 1.111 2025/10/05 17:11:21 krw Exp $      */
/*      $NetBSD: autoconf.c,v 1.20 1996/05/03 19:41:56 christos Exp $   */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)autoconf.c  7.1 (Berkeley) 5/9/91
 */

/*
 * Setup the system to run on the current machine.
 *
 * cpu_configure() is called at boot time and initializes the vba
 * device tables and the memory controller monitoring.  Available
 * devices are determined (from possibilities mentioned in ioconf.c),
 * and the drivers are initialized.
 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/reboot.h>
#include <sys/device.h>
#include <sys/hibernate.h>
#include <sys/disklabel.h>

#include <net/if.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <uvm/uvm_extern.h>

#include <machine/gdt.h>
#include <machine/biosvar.h>

#include "ioapic.h"

#include "acpi.h"

#if NIOAPIC > 0
#include <machine/i82093var.h>
#endif

#ifdef MULTIPROCESSOR
#include <machine/mpbiosvar.h>
#endif

/*
 * The following several variables are related to
 * the configuration process, and are used in initializing
 * the machine.
 */
extern dev_t bootdev;

/* Support for VIA C3 RNG */
extern struct timeout viac3_rnd_tmo;
extern int      viac3_rnd_present;
void            viac3_rnd(void *);

extern struct timeout rdrand_tmo;
extern int      has_rdrand;
extern int      has_rdseed;
void            rdrand(void *);

#ifdef CRYPTO
void            viac3_crypto_setup(void);
extern int      i386_has_xcrypt;
#endif

void
unmap_startup(void)
{
        extern int kernel_text[], endboot[];
        vaddr_t p = (vaddr_t)kernel_text;

        do {
                pmap_kremove(p, PAGE_SIZE);
                p += PAGE_SIZE;
        } while (p < (vaddr_t)endboot);
}

/*
 * Determine i/o configuration for a machine.
 */
void
cpu_configure(void)
{
        /*
         * Note, on i386, configure is not running under splhigh unlike other
         * architectures.  This fact is used by the pcmcia irq line probing.
         */

        gdt_init();             /* XXX - pcibios uses gdt stuff */

        /* Set up proc0's TSS */
        i386_proc0_tss_init();

        pmap_bootstrap_pae();

#if defined(MULTIPROCESSOR) || \
    (NACPI > 0 && !defined(SMALL_KERNEL))
        /* install the lowmem ptp after boot args for 1:1 mappings */
        pmap_prealloc_lowmem_ptp();
#endif

#ifdef MULTIPROCESSOR
        pmap_kenter_pa((vaddr_t)MP_TRAMPOLINE,          /* virtual */
            (paddr_t)MP_TRAMPOLINE,                     /* physical */
            PROT_READ | PROT_WRITE | PROT_EXEC);        /* protection */
        pmap_kenter_pa((vaddr_t)MP_TRAMP_DATA,          /* virtual */
            (paddr_t)MP_TRAMP_DATA,                     /* physical */
            PROT_READ | PROT_WRITE);                    /* protection */
#endif

        if (config_rootfound("mainbus", NULL) == NULL)
                panic("cpu_configure: mainbus not configured");

#if NIOAPIC > 0
        ioapic_enable();
#endif

        proc0.p_addr->u_pcb.pcb_cr0 = rcr0();

        unmap_startup();

#ifdef MULTIPROCESSOR
        /* propagate TSS configuration to the idle pcb's. */
        cpu_init_idle_pcbs();
#endif
        spl0();

        /*
         * We can not know which is our root disk, defer
         * until we can checksum blocks to figure it out.
         */
        cold = 0;


        /*
         * At this point the RNG is running, and if FSXR is set we can
         * use it.  Here we setup a periodic timeout to collect the data.
         */
        if (viac3_rnd_present) {
                timeout_set(&viac3_rnd_tmo, viac3_rnd, &viac3_rnd_tmo);
                viac3_rnd(&viac3_rnd_tmo);
        }
        if (has_rdrand || has_rdseed) {
                timeout_set(&rdrand_tmo, rdrand, &rdrand_tmo);
                rdrand(&rdrand_tmo);
        }

#ifdef CRYPTO
        /*
         * Also, if the chip has crypto available, enable it.
         */
        if (i386_has_xcrypt)
                viac3_crypto_setup();
#endif
}

void
device_register(struct device *dev, void *aux)
{
}

/*
 * Now that we are fully operational, we can checksum the
 * disks, and using some heuristics, hopefully are able to
 * always determine the correct root disk.
 */
void
diskconf(void)
{
        int majdev, unit, part = 0;
        struct device *bootdv = NULL;
        dev_t tmpdev;
        char buf[128];
        extern bios_bootmac_t *bios_bootmac;

        dkcsumattach();

        if ((bootdev & B_MAGICMASK) == (u_int)B_DEVMAGIC) {
                majdev = B_TYPE(bootdev);
                unit = B_UNIT(bootdev);
                part = B_PARTITION(bootdev);
                snprintf(buf, sizeof buf, "%s%d%c", findblkname(majdev),
                    unit, DL_PARTNUM2NAME(part));
                bootdv = parsedisk(buf, strlen(buf), part, &tmpdev);
        }

        if (bios_bootmac) {
                struct ifnet *ifp;

                TAILQ_FOREACH(ifp, &ifnetlist, if_list) {
                        if (ifp->if_type == IFT_ETHER &&
                            memcmp(bios_bootmac->mac,
                            ((struct arpcom *)ifp)->ac_enaddr,
                            ETHER_ADDR_LEN) == 0)
                                break;
                }
                if (ifp) {
                        printf("PXE boot MAC address %s, interface %s\n",
                            ether_sprintf(bios_bootmac->mac), ifp->if_xname);
#if defined(NFSCLIENT)
                        bootdv = parsedisk(ifp->if_xname, strlen(ifp->if_xname),
                            0, &tmpdev);
                        part = 0;
#endif
                } else
                        printf("PXE boot MAC address %s, interface %s\n",
                            ether_sprintf(bios_bootmac->mac), "unknown");
        }

        setroot(bootdv, part, RB_USERREQ);
        dumpconf();

#ifdef HIBERNATE
        hibernate_resume();
#endif /* HIBERNATE */
}

const struct nam2blk nam2blk[] = {
        { "wd",         0 },
        { "fd",         2 },
        { "sd",         4 },
        { "cd",         6 },
        { "vnd",        14 },
        { "rd",         17 },
        { NULL,         -1 }
};