/*      $NetBSD: machdep.c,v 1.11 2025/12/21 07:00:26 skrll Exp $       */

/*
 * Copyright 2001, 2002 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
 * 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.
 */

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department, The Mach Operating System project at
 * Carnegie-Mellon University and Ralph Campbell.
 *
 * 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.
 *
 *      @(#)machdep.c   8.3 (Berkeley) 1/12/94
 *      from: Utah Hdr: machdep.c 1.63 91/04/24
 */

/*
 * Copyright (c) 2009, 2010 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.11 2025/12/21 07:00:26 skrll Exp $");

#include "opt_ddb.h"
#include "opt_execfmt.h"
#include "opt_modular.h"

#define _MIPS_BUS_DMA_PRIVATE

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/mount.h>
#include <sys/kcore.h>
#include <sys/boot_flag.h>
#include <sys/termios.h>
#include <sys/ksyms.h>
#include <sys/device.h>
#include <sys/cpu.h>

#include <uvm/uvm_extern.h>

#include <dev/cons.h>

#include "ksyms.h"

#if NKSYMS || defined(DDB) || defined(MODULAR)
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#include <sys/exec_elf.h>
#endif

#include <evbmips/loongson/autoconf.h>
#include <evbmips/loongson/loongson_intr.h>
#include <evbmips/loongson/loongson_bus_defs.h>
#include <machine/cpu.h>
#include <machine/psl.h>

#include <mips/locore.h>

#include <mips/bonito/bonitoreg.h>
#include <mips/bonito/bonitovar.h>
#include <mips/pmon/pmon.h>

#include "sisfb.h"
#if NSISFB > 0
#include <dev/pci/sisfb.h>
#endif

#include "lynxfb.h"
#if NLYNXFB > 0
#include <dev/pci/lynxfbvar.h>
#endif

#include "pckbc.h"
#if NPCKBC > 0
#include <dev/isa/isareg.h>
#include <dev/ic/i8042reg.h>
#include <dev/ic/pckbcvar.h>
#endif
#include "pckbd.h"
#include "ukbd.h"
#if NUKBD > 0
#include <dev/usb/ukbdvar.h>
#endif
#if NPCKBD > 0 || NUKBD > 0
#include <dev/wscons/wskbdvar.h>
#endif

#include "com.h"
#if NCOM > 0
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

bus_space_tag_t comconsiot;
bus_addr_t comconsaddr;
int comconsrate = 0;
#endif /* NCOM > 0 */

#ifdef LOW_DEBUG
#define DPRINTF(x) printf x
#define DPPRINTF(x) pmon_printf x
#else
#define DPRINTF(x)
#define DPPRINTF(x)
#endif


int ex_mallocsafe = 0;
struct extent *loongson_io_ex = NULL;
struct extent *loongson_mem_ex = NULL;
struct mips_bus_space bonito_iot;
struct mips_bus_space bonito_memt;
struct mips_bus_dma_tag bonito_dmat;
struct mips_pci_chipset bonito_pc;

uint loongson_ver;

const struct platform *sys_platform;
struct bonito_flavour {
        const char *prefix;
        const struct platform *platform;
};

extern const struct platform fuloong_platform;
extern const struct platform gdium_platform;
extern const struct platform generic2e_platform;
extern const struct platform lynloong_platform;
extern const struct platform yeeloong_platform;

const struct bonito_flavour bonito_flavours[] = {
        /* Lemote Fuloong 2F mini-PC */
        { "LM6002",     &fuloong_platform }, /* dual Ethernet, no prefix */
        { "LM6003",     &fuloong_platform },
        { "LM6004",     &fuloong_platform },
        /* EMTEC Gdium Liberty 1000 */
        { "Gdium",      &gdium_platform },
        /* Lemote Yeeloong 8.9" netbook */
        { "LM8089",     &yeeloong_platform },
        /* supposedly Lemote Yeeloong 10.1" netbook, but those found so far
           report themselves as LM8089 */
        { "LM8101",     &yeeloong_platform },
        /* Lemote Lynloong all-in-one computer */
        { "LM9001",     &lynloong_platform },
        { NULL }
};

/* Maps for VM objects. */
struct vm_map *phys_map = NULL;

int     netboot;                /* Are we netbooting? */

phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
int mem_cluster_cnt;

void    mach_init(int, int32_t, int32_t, int32_t, char *);

static int  pmoncngetc(dev_t);
static void pmoncnputc(dev_t, int);

struct consdev pmoncons = {
        NULL,           /* probe */
        NULL,           /* init */
        pmoncngetc,     /* getc */
        pmoncnputc,     /* putc */
        nullcnpollc,    /* poolc */
        NULL,           /* BELL */
        makedev(0, 0),
        CN_DEAD
};

/* The LOONGSON kernels only support little endian */
CTASSERT(_BYTE_ORDER == _LITTLE_ENDIAN);

/*
 * Do all the stuff that locore normally does before calling main().
 */
void
mach_init(int32_t argc, int32_t argva, int32_t enva, int32_t callvec,
    char *boot_esym)
{
        void *kernend;
#ifdef NOTYET
        int howto;
#endif
        const char *env;
        int i;
        psize_t memlo, memhi;
        const struct bonito_flavour *f;
        char *ssym = NULL, *esym = NULL;
        pcireg_t reg;
        pcitag_t pcitag;

        extern char edata[], end[];

        /*
         * Clear the BSS segment.
         */
        memset(edata, 0, (char *)end - edata);

        pmon_init(argc, argva, enva, callvec);
        DPPRINTF(("pmon hello\n"));

        cn_tab = &pmoncons;

        DPRINTF(("hello 0x%x %d 0x%x 0x%x %p stack %p\n", pmon_callvec, argc, argva, enva, boot_esym, &i));

        /*
         * Reserve space for the symbol table, if it exists.
         */

#if NKSYMS || defined(DDB) || defined(MODULAR)
        /* Attempt to locate ELF header and symbol table after kernel. */
        if (end[0] == ELFMAG0 && end[1] == ELFMAG1 &&
            end[2] == ELFMAG2 && end[3] == ELFMAG3) {
                /* ELF header exists directly after kernel. */
                ssym = end;
                esym = boot_esym;
                kernend = (void *)mips_round_page(esym);
        } else {
                ssym = (char *)(vaddr_t)*(int32_t *)end;
                if (((long)ssym - (long)end) >= 0 &&
                    ((long)ssym - (long)end) <= 0x1000 &&
                    ssym[0] == ELFMAG0 && ssym[1] == ELFMAG1 &&
                    ssym[2] == ELFMAG2 && ssym[3] == ELFMAG3) {
                        /* Pointers exist directly after kernel. */
                        esym = (char *)(vaddr_t)*((int32_t *)end + 1);
                        kernend = (void *)mips_round_page(esym);
                } else {
                        /* Pointers aren't setup either... */
                        ssym = NULL;
                        esym = NULL;
                        kernend = (void *)mips_round_page(end);
                }
        }
        DPRINTF(("ssym %p esym %p\n", ssym, esym));
#endif

        /*
         * Set up the exception vectors and CPU-specific function
         * vectors early on.  We need the wbflush() vector set up
         * before comcnattach() is called (or at least before the
         * first printf() after that is called).
         * Also clears the I+D caches.
         */
        DPRINTF(("mips_vector_init "));
        mips_vector_init(NULL, false);

        DPRINTF(("uvm_md_init\n"));
        uvm_md_init();
#if NKSYMS || defined(DDB) || defined(MODULAR)
        //ksyms_addsyms_elf((vaddr_t)esym - (vaddr_t)ssym, ssym, esym);
#endif

        /*
         * Try and figure out what kind of hardware we are.
         */

        env = pmon_getenv("systype");
        if (env == NULL) {
                printf("Unable to figure out system type!\n");
                goto unsupported;
        }
        if (strcmp(env, "Bonito") != 0) {
                printf("This kernel doesn't support system type \"%s\".\n",
                    env);
                goto unsupported;
        }

        /*
         * While the kernel supports other processor types than Loongson,
         * we are not expecting a Bonito-based system with a different
         * processor.  Just to be on the safe side, refuse to run on
         * non Loongson2 processors for now.
         */

        switch ((mips_options.mips_cpu_id >> 8) & 0xff) {
        case MIPS_LOONGSON2:
                switch (mips_options.mips_cpu_id & 0xff) {
                case 0x00:
                        loongson_ver = 0x2c;
                        break;
                case 0x02:
                        loongson_ver = 0x2e;
                        break;
                case 0x03:
                        loongson_ver = 0x2f;
                        break;
                case 0x05:
                        loongson_ver = 0x3a;
                        break;
                }
                if (loongson_ver == 0x2e || loongson_ver == 0x2f)
                        break;
                /* FALLTHROUGH */
        default:
                printf("This kernel doesn't support processor type 0x%x"
                    ", version %d.%d.\n",
                    (mips_options.mips_cpu_id >> 8) & 0xff,
                    (mips_options.mips_cpu_id >> 4) & 0x0f,
                    mips_options.mips_cpu_id & 0x0f);
                goto unsupported;
        }

        /*
         * Try to figure out what particular machine we run on, depending
         * on the PMON version information.
         */

        env = pmon_getenv("Version");
        if (env == NULL) {
                /*
                 * If this is a 2E system, use the generic code and hope
                 * for the best.
                 */
                if (loongson_ver == 0x2e) {
                        sys_platform = &generic2e_platform;
                } else {
                        printf("Unable to figure out model!\n");
                        goto unsupported;
                }
        } else {
                for (f = bonito_flavours; f->prefix != NULL; f++)
                        if (strncmp(env, f->prefix, strlen(f->prefix)) ==
                            0) {
                                sys_platform = f->platform;
                                break;
                        }

                if (sys_platform == NULL) {
                        /*
                         * Early Lemote designs shipped without a model prefix.
                         * Hopefully these well be close enough to the first
                         * generation Fuloong 2F design (LM6002); let's warn
                         * the user and try this if version is 1.2.something
                         * (1.3 onwards are expected to have a model prefix,
                         *  and there are currently no reports of 1.1 and
                         *  below being 2F systems).
                         *
                         * Note that this could be handled by adding a
                         * "1.2." machine type entry to the flavours table,
                         * but I prefer have it stand out.
                         * LM6002 users are encouraged to add the system
                         * model prefix to the `Version' variable.
                         */
                        if (strncmp(env, "1.2.", 4) == 0) {
                                printf("No model prefix in version"
                                    " string \"%s\".\n"
                                    "Attempting to match as Lemote Fuloong\n",
                                    env);
                                sys_platform = &fuloong_platform;
                        }
                }

                if (sys_platform == NULL) {
                        printf("This kernel doesn't support model \"%s\"."
                            "\n", env);
                        goto unsupported;
                }
        }

        cpu_setmodel("%s %s", sys_platform->vendor, sys_platform->product);
        DPRINTF(("Found %s, setting up.\n", cpu_getmodel()));

        /*
         * Figure out memory information.
         * PMON reports it in two chunks, the memory under the 256MB
         * CKSEG limit, and memory above that limit.  We need to do the
         * math ourselves.
         */

        env = pmon_getenv("memsize");
        if (env == NULL) {
                printf("Could not get memory information"
                    " from the firmware\n");
                goto unsupported;
        }
        memlo = strtoul(env, NULL, 10); /* size in MB */
        DPRINTF(("memlo %" PRIdPSIZE, memlo));
        if (memlo < 0 || memlo > 256) {
                printf("Incorrect low memory size `%s'\n", env);
                goto unsupported;
        }

        /* 3A PMON only reports up to 240MB as low memory */
        if (memlo >= 240) {
                env = pmon_getenv("highmemsize");
                if (env == NULL)
                        memhi = 0;
                else
                        memhi = strtoul(env, NULL, 10); /* size in MB */
                if (memhi < 0 || memhi > (64 * 1024) - 256) {
                        printf("Incorrect high memory size `%s'\n",
                            env);
                        /* better expose the problem than limit to 256MB */
                        goto unsupported;
                }
        } else
                memhi = 0;

        DPRINTF(("memhi %" PRIdPSIZE "\n", memhi));
        memlo = memlo * 1024 * 1024;
        memhi = memhi * 1024 * 1024;

        switch (loongson_ver) {
        case 0x2e:
                loongson2e_setup(memlo, memhi,
                    MIPS_KSEG0_START, (vaddr_t)kernend, &bonito_dmat);
                break;
        default:
        case 0x2f:
        case 0x3a:
                loongson2f_setup(memlo, memhi,
                    MIPS_KSEG0_START, (vaddr_t)kernend, &bonito_dmat);
                break;
        }

        DPRINTF(("bonito_pci_init "));
        bonito_pci_init(&bonito_pc, sys_platform->bonito_config);
        bonito_pc.pc_intr_v = __UNCONST(sys_platform->bonito_config);
        bonito_pc.pc_intr_map = loongson_pci_intr_map;
        bonito_pc.pc_intr_string = loongson_pci_intr_string;
        bonito_pc.pc_intr_evcnt = loongson_pci_intr_evcnt;
        bonito_pc.pc_intr_establish = loongson_pci_intr_establish;
        bonito_pc.pc_intr_disestablish = loongson_pci_intr_disestablish;
        bonito_pc.pc_conf_interrupt = loongson_pci_conf_interrupt;
        bonito_pc.pc_pciide_compat_intr_establish =
            loongson_pciide_compat_intr_establish;
        DPRINTF(("bonito_bus_io_init "));
        bonito_bus_io_init(&bonito_iot, NULL);
        /* override mapping function */
        bonito_iot.bs_map = bonito_bus_io_legacy_map;
        DPRINTF(("bonito_bus_mem_init\n"));
        bonito_bus_mem_init(&bonito_memt, NULL);

        bonito_dmat._cookie = __UNCONST(sys_platform);
        bonito_dmat._dmamap_ops = mips_bus_dmamap_ops;
        bonito_dmat._dmamem_ops = mips_bus_dmamem_ops;
        bonito_dmat._dmatag_ops = mips_bus_dmatag_ops;

        DPRINTF(("sys_platform->setup %p\n", sys_platform->setup));
        if (sys_platform->setup != NULL)
                (*(sys_platform->setup))();

#if NCOM > 0
        DPRINTF(("comconsrate %d\n", comconsrate));
        if (comconsrate > 0) {
                if (comcnattach(comconsiot, comconsaddr, comconsrate,
                    COM_FREQ, COM_TYPE_NORMAL,
                    (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
                        panic("unable to initialize serial console");
        }
#endif /* NCOM > 0 */

        for (i = 0; i < 32 - 0x11; i++) {
                pcitag = pci_make_tag(&bonito_pc, 0, i, 0);
                reg = pci_conf_read(&bonito_pc, pcitag, PCI_CLASS_REG);
                DPRINTF(("dev %d class 0x%x", i, reg));
                reg = pci_conf_read(&bonito_pc, pcitag, PCI_ID_REG);
                DPRINTF((" id 0x%x; ", reg));
#if NSISFB > 0
                if (cn_tab == &pmoncons)
                        sisfb_cnattach(&bonito_memt, &bonito_iot, &bonito_pc,
                            pcitag, reg);
#endif
#if NLYNXFB > 0
                if (cn_tab == &pmoncons)
                        lynxfb_cnattach(&bonito_memt, &bonito_iot, &bonito_pc,
                            pcitag, reg);
#endif
                if (cn_tab == &pmoncons)
                        gdium_cnattach(&bonito_memt, &bonito_iot, &bonito_pc,
                            pcitag, reg);
                if (cn_tab != &pmoncons)
                        break;
        }
#if NPCKBC > 0 || NUKBD > 0
        if (cn_tab != &pmoncons) {
                int rc = ENXIO;
#if NPCKBC > 0
                if (rc != 0)
                        rc = pckbc_cnattach(&bonito_iot, IO_KBD, KBCMDP, 0, 0);
#endif
#if NUKBD > 0
                if (rc != 0)
                        rc = ukbd_cnattach();
#endif
        }
#endif  /* NPCKBC > 0 || NUKBD > 0 */
        DPRINTF(("\n"));

        /*
         * Get the timer from PMON.
         */
        DPRINTF(("search cpuclock "));
        env = pmon_getenv("cpuclock");
        DPRINTF(("got %s ", env));
        if (env != NULL) {
                curcpu()->ci_cpu_freq =
                    strtoul(env, NULL, 10);
        }

        DPRINTF(("cpuclock %ld\n", curcpu()->ci_cpu_freq));

        if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
                curcpu()->ci_cpu_freq /= 2;


        /* Compute the number of ticks for hz. */
        curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz;

        /* Compute the delay divisor. */
        curcpu()->ci_divisor_delay =
            ((curcpu()->ci_cpu_freq + 500000) / 1000000);

        /*
         * Get correct cpu frequency if the CPU runs at twice the
         * external/cp0-count frequency.
         */
        if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
                curcpu()->ci_cpu_freq *= 2;

#ifdef DEBUG
        printf("Timer calibration: %lu cycles/sec\n",
            curcpu()->ci_cpu_freq);
#endif

#if NCOM > 0 && 0
        /*
         * Delay to allow firmware putchars to complete.
         * FIFO depth * character time.
         * character time = (1000000 / (defaultrate / 10))
         */
        delay(160000000 / comcnrate);
        if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate,
            COM_FREQ, COM_TYPE_NORMAL,
            (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
                panic("malta: unable to initialize serial console");
#endif /* NCOM > 0 */

        /*
         * XXX: check argv[0] - do something if "gdb"???
         */

        /*
         * Look at arguments passed to us and compute boothowto.
         */
        boothowto = RB_AUTOBOOT;
#ifdef NOTYET
        for (i = 1; i < argc; i++) {
                for (cp = argv[i]; *cp; cp++) {
                        /* Ignore superfluous '-', if there is one */
                        if (*cp == '-')
                                continue;

                        howto = 0;
                        BOOT_FLAG(*cp, howto);
                        if (! howto)
                                printf("bootflag '%c' not recognised\n", *cp);
                        else
                                boothowto |= howto;
                }
        }
#endif

        /*
         * Load the rest of the available pages into the VM system.
         */
        mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend,
            mem_clusters, mem_cluster_cnt, NULL, 0);

        /*
         * Initialize error message buffer (at end of core).
         */
        DPRINTF(("mips_init_msgbuf\n"));
        mips_init_msgbuf();

        DPRINTF(("pmap_bootstrap\n"));
        pmap_bootstrap();

        /*
         * Allocate uarea page for lwp0 and set it.
         */
        DPRINTF(("curlwp %p ", curlwp));
        DPRINTF(("curlwp stack %p\n", curlwp->l_addr));
        mips_init_lwp0_uarea();

        DPRINTF(("curlwp %p ", curlwp));
        DPRINTF(("curlwp stack %p\n", curlwp->l_addr));

        /*
         * Initialize debuggers, and break into them, if appropriate.
         */
#if defined(DDB)
        if (boothowto & RB_KDB)
                Debugger();
#endif
        DPRINTF(("return\n"));
        return;
unsupported:
        panic("unsupported hardware\n");
}

void
consinit(void)
{

        /*
         * Everything related to console initialization is done
         * in mach_init().
         */
}

/*
 * Allocate memory for variable-sized tables,
 */
void
cpu_startup(void)
{
        /*
         *  Do the common startup items.
         */
        cpu_startup_common();

        /*
         * Virtual memory is bootstrapped -- notify the bus spaces
         * that memory allocation is now safe.
         */
        ex_mallocsafe = 1;
}

int     waittime = -1;

void
cpu_reboot(int howto, char *bootstr)
{

        /* Take a snapshot before clobbering any registers. */
        savectx(curpcb);

        if (cold) {
                howto |= RB_HALT;
                goto haltsys;
        }

        /* If "always halt" was specified as a boot flag, obey. */
        if (boothowto & RB_HALT)
                howto |= RB_HALT;

        boothowto = howto;
        if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
                waittime = 0;
                vfs_shutdown();
        }

        splhigh();

        if (howto & RB_DUMP)
                dumpsys();

haltsys:
        doshutdownhooks();

        pmf_system_shutdown(boothowto);

        if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
                if (sys_platform->powerdown != NULL)
                        sys_platform->powerdown();
        }

        if (howto & RB_HALT) {
                printf("\n");
                printf("The operating system has halted.\n");
                printf("Please press any key to reboot.\n\n");
                cnpollc(true);  /* For proper keyboard command handling */
                cngetc();
                cnpollc(false);
        }

        printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");

        if (sys_platform->reset != NULL)
                sys_platform->reset();

        __asm__ __volatile__ (
                "\t.long 0x3c02bfc0\n"
                "\t.long 0x00400008\n"
            ::: "v0");
}

/*
 * Early console through pmon routines.
 */

int
pmoncngetc(dev_t dev)
{
        /*
         * PMON does not give us a getc routine.  So try to get a whole line
         * and return it char by char, trying not to lose the \n.  Kind
         * of ugly but should work.
         *
         * Note that one could theoretically use pmon_read(STDIN, &c, 1)
         * but the value of STDIN within PMON is not a constant and there
         * does not seem to be a way of letting us know which value to use.
         */
        static char buf[1 + PMON_MAXLN];
        static char *bufpos = buf;
        int c;

        if (*bufpos == '\0') {
                bufpos = buf;
                if (pmon_gets(buf) == NULL) {
                        /* either an empty line or EOF. assume the former */
                        return (int)'\n';
                } else {
                        /* put back the \n sign */
                        buf[strlen(buf)] = '\n';
                }
        }

        c = (int)*bufpos++;
        if (bufpos - buf > PMON_MAXLN) {
                bufpos = buf;
                *bufpos = '\0';
        }

        return c;
}

void
pmoncnputc(dev_t dev, int c)
{
        if (c == '\n')
                pmon_printf("\n");
        else
                pmon_printf("%c", c);
}