/*      $NetBSD: machdep.c,v 1.123 2024/03/05 14:15:33 thorpej Exp $    */

/*
 * 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
 */

#include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.123 2024/03/05 14:15:33 thorpej Exp $");

/* from: Utah Hdr: machdep.c 1.63 91/04/24 */

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

#define __INTR_PRIVATE

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/exec.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <sys/kcore.h>
#include <sys/ksyms.h>
#include <sys/cpu.h>
#include <sys/intr.h>

#include <uvm/uvm_extern.h>

#include <ufs/mfs/mfs_extern.h>         /* mfs_initminiroot() */

#include <mips/cache.h>
#include <mips/locore.h>

#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#include <machine/autoconf.h>
#include <machine/bootinfo.h>
#include <machine/apbus.h>
#include <machine/apcall.h>


#define _NEWSMIPS_BUS_DMA_PRIVATE
#include <machine/bus.h>

#ifdef DDB
#include <machine/db_machdep.h>
#include <ddb/db_access.h>
#include <ddb/db_extern.h>
#include <ddb/db_sym.h>
#endif

#include <machine/adrsmap.h>
#include <machine/machConst.h>
#include <newsmips/newsmips/machid.h>
#include <dev/cons.h>

#include "ksyms.h"

/* maps for VM objects */

struct vm_map *phys_map = NULL;

char *bootinfo = NULL;          /* pointer to bootinfo structure */
int systype;                    /* what type of NEWS we are */
struct apbus_sysinfo *_sip = NULL;
void *sccport0a;

phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
int mem_cluster_cnt;

struct idrom idrom;
void (*hardware_intr)(int, vaddr_t, uint32_t);
void (*enable_intr)(void);
void (*disable_intr)(void);
void (*enable_timer)(void);

/*
 *  Local functions.
 */

/* initialize bss, etc. from kernel start, before main() is called. */
void mach_init(int, int, int, int);

void prom_halt(int) __attribute__((__noreturn__));
void to_monitor(int) __attribute__((__noreturn__));

#ifdef DEBUG
/* stacktrace code violates prototypes to get callee's registers */
extern void stacktrace(void); /*XXX*/
#endif

extern u_long bootdev;
extern char edata[], end[];

/*
 * Do all the stuff that locore normally does before calling main().
 * Process arguments passed to us by the prom monitor.
 * Return the first page address following the system.
 */
void
mach_init(int x_boothowto, int x_bootdev, int x_bootname, int x_maxmem)
{
        u_long first, last;
        char *kernend;
        const char *model;
        struct btinfo_magic *bi_magic;
        struct btinfo_bootarg *bi_arg;
        struct btinfo_systype *bi_systype;
#if NKSYMS || defined(DDB) || defined(MODULAR)
        struct btinfo_symtab *bi_sym;
        int nsym = 0;
        char *ssym, *esym;

        ssym = esym = NULL;     /* XXX: gcc */
#endif
        bi_arg = NULL;

        bootinfo = (void *)BOOTINFO_ADDR;       /* XXX */
        bi_magic = lookup_bootinfo(BTINFO_MAGIC);
        if (bi_magic && bi_magic->magic == BOOTINFO_MAGIC) {
                bi_arg = lookup_bootinfo(BTINFO_BOOTARG);
                if (bi_arg) {
                        x_boothowto = bi_arg->howto;
                        x_bootdev = bi_arg->bootdev;
                        x_maxmem = bi_arg->maxmem;
                }
#if NKSYMS || defined(DDB) || defined(MODULAR)
                bi_sym = lookup_bootinfo(BTINFO_SYMTAB);
                if (bi_sym) {
                        nsym = bi_sym->nsym;
                        ssym = (void *)bi_sym->ssym;
                        esym = (void *)bi_sym->esym;
                }
#endif

                bi_systype = lookup_bootinfo(BTINFO_SYSTYPE);
                if (bi_systype)
                        systype = bi_systype->type;
        } else {
                /*
                 * Running kernel is loaded by non-native loader;
                 * clear the BSS segment here.
                 */
                memset(edata, 0, end - edata);
        }

        if (systype == 0) 
                systype = NEWS3400;     /* XXX compatibility for old boot */

#ifdef news3400
        if (systype == NEWS3400) {
                sccport0a = (void *)SCCPORT0A;
        }
#endif

#if defined(news5000) || defined(news4000)
        if (systype == NEWS5000 || systype == NEWS4000) {
                int i;
                char *bspec = (char *)x_bootdev;

                if (bi_arg == NULL)
                        panic("%s requires BTINFO_BOOTARG to boot",
                            systype == NEWS5000 ? "news5000" : "news4000");

                _sip = (void *)bi_arg->sip;
                x_maxmem = _sip->apbsi_memsize;
                x_maxmem -= 0x00100000; /* reserve 1MB for ROM monitor */
                if (strncmp(bspec, "scsi", 4) == 0) {
                        x_bootdev = (5 << 28) | 0;       /* magic, sd */
                        bspec += 4;
                        if (*bspec != '(' /*)*/)
                                goto bootspec_end;
                        i = strtoul(bspec + 1, &bspec, 10);
                        x_bootdev |= (i << 24);         /* bus */
                        if (*bspec != ',')
                                goto bootspec_end;
                        i = strtoul(bspec + 1, &bspec, 10);
                        x_bootdev |= (i / 10) << 20;    /* controller */
                        x_bootdev |= (i % 10) << 16;    /* unit */
                        if (*bspec != ',')
                                goto bootspec_end;
                        i = strtoul(bspec + 1, &bspec, 10);
                        x_bootdev |= (i << 8);          /* partition */
                }
 bootspec_end:
                sccport0a = (systype == NEWS5000) ?
                    (void *)NEWS5000_SCCPORT0A : (void *)NEWS4000_SCCPORT0A;
                consinit();
        }
#endif /* news5000 || news4000 */

        /*
         * Save parameters into kernel work area.
         */
        *(int *)(MIPS_PHYS_TO_KSEG1(MACH_MAXMEMSIZE_ADDR)) = x_maxmem;
        *(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTDEV_ADDR)) = x_bootdev;
        *(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTSW_ADDR)) = x_boothowto;

        kernend = (char *)mips_round_page(end);
#if NKSYMS || defined(DDB) || defined(MODULAR)
        if (nsym)
                kernend = (char *)mips_round_page(esym);
#endif

        uvm_md_init();

        boothowto = x_boothowto;
        bootdev = x_bootdev;
        physmem = btoc(x_maxmem);

        /*
         * Now that we know how much memory we have, initialize the
         * mem cluster array.
         */
        mem_clusters[0].start = 0;              /* XXX is this correct? */
        mem_clusters[0].size  = ctob(physmem);
        mem_cluster_cnt = 1;

        /*
         * Copy exception-dispatch code down to exception vector.
         * Initialize locore-function vector.
         * Clear out the I and D caches.
         */
        mips_vector_init(NULL, false);

        /*
         * We know the CPU type now.  Initialize our DMA tags (might
         * need this early).
         */
        newsmips_bus_dma_init();

#if NKSYMS || defined(DDB) || defined(MODULAR)
        if (nsym)
                ksyms_addsyms_elf(esym - ssym, ssym, esym);
#endif

#ifdef KADB
        boothowto |= RB_KDB;
#endif

        /*
         * Check to see if a mini-root was loaded into memory. It resides
         * at the start of the next page just after the end of BSS.
         */
        if (boothowto & RB_MINIROOT)
                kernend += round_page(mfs_initminiroot(kernend));

        /*
         * Load the rest of the available pages into the VM system.
         */
        first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
        last = mem_clusters[0].start + mem_clusters[0].size;
        uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
            VM_FREELIST_DEFAULT);

        /*
         * Initialize error message buffer (at end of core).
         */
        mips_init_msgbuf();

        /*
         * Initialize the virtual memory system.
         */
        pmap_bootstrap();

        /*
         * Allocate uarea page for lwp0 and set it.
         */
        mips_init_lwp0_uarea();

        /*
         * Determine what model of computer we are running on.
         */
        switch (systype) {
#ifdef news3400
        case NEWS3400:
                news3400_init();
                cpu_setmodel("%s", idrom.id_machine);
                model = cpu_getmodel();
                if (strcmp(model, "news3400") == 0 ||
                    strcmp(model, "news3200") == 0 ||
                    strcmp(model, "news3700") == 0) {
                        /*
                         * Set up interrupt handling and I/O addresses.
                         */
                        hardware_intr = news3400_intr;
                        cpuspeed = 10;
                } else {
                        printf("kernel not configured for machine %s\n", model);
                }
                break;
#endif

#ifdef news5000
        case NEWS5000:
                news5000_init();
                cpu_setmodel("%s", idrom.id_machine);
                model = cpu_getmodel();
                if (strcmp(model, "news5000") == 0 ||
                    strcmp(model, "news5900") == 0) {
                        /*
                         * Set up interrupt handling and I/O addresses.
                         */
                        hardware_intr = news5000_intr;
                        cpuspeed = 50;  /* ??? XXX */
                } else {
                        printf("kernel not configured for machine %s\n", model);
                }
                break;
#endif

#ifdef news4000
        case NEWS4000:
                news4000_init();
                cpu_setmodel("%s", idrom.id_machine);
                model = cpu_getmodel();
                if (strcmp(model, "news4000") == 0) {
                        /*
                         * Set up interrupt handling and I/O addresses.
                         */
                        hardware_intr = news4000_intr;
                        cpuspeed = 40;  /* ??? XXX */
                } else {
                        printf("kernel not configured for machine %s\n", model);
                }
                break;
#endif

        default:
                printf("kernel not configured for systype %d\n", systype);
                break;
        }
}

void
mips_machdep_cache_config(void)
{
        /* All r4k news boxen have a 1MB L2 cache. */
        if (CPUISMIPS3)
                mips_cache_info.mci_sdcache_size = 1024 * 1024;
}

/*
 * cpu_startup: allocate memory for variable-sized tables,
 * initialize CPU, and do autoconfiguration.
 */
void
cpu_startup(void)
{
        printf("SONY NET WORK STATION, Model %s, ", idrom.id_model);
        printf("Machine ID #%d\n", idrom.id_serial);

        cpu_startup_common();
}

/*
 * lookup_bootinfo:
 * Look up information in bootinfo of boot loader.
 */
void *
lookup_bootinfo(int type)
{
        struct btinfo_common *bt;
        char *help = bootinfo;

        /* Check for a bootinfo record first. */
        if (help == NULL)
                return NULL;

        do {
                bt = (struct btinfo_common *)help;
                if (bt->type == type)
                        return (void *)help;
                help += bt->next;
        } while (bt->next != 0 &&
                (size_t)help < (size_t)bootinfo + BOOTINFO_SIZE);

        return NULL;
}

/*
 * call PROM to halt or reboot.
 */
void
prom_halt(int howto)

{
#if defined(news5000) || defined(news4000)
        if (systype == NEWS5000 || systype == NEWS4000)
                apcall_exit(howto);
#endif
#ifdef news3400
        if (systype == NEWS3400)
                to_monitor(howto);
#endif
        for (;;);
}

int     waittime = -1;

void
cpu_reboot(volatile int howto, char *bootstr)
{

        /* take a snap shot before clobbering any registers */
        savectx(curpcb);

#ifdef DEBUG
        if (panicstr)
                stacktrace();
#endif

        /* If system is cold, just halt. */
        if (cold) {
                howto |= RB_HALT;
                goto haltsys;
        }

        /* If "always halt" was specified as a boot flag, obey. */
        if ((boothowto & RB_HALT) != 0)
                howto |= RB_HALT;

        boothowto = howto;
        if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
                /*
                 * Synchronize the disks....
                 */
                waittime = 0;
                vfs_shutdown();
        }

        /* Disable interrupts. */
        disable_intr();

        splhigh();

        /* If rebooting and a dump is requested do it. */
#if 0
        if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
#else
        if (howto & RB_DUMP)
#endif
                dumpsys();

haltsys:

        /* run any shutdown hooks */
        doshutdownhooks();

        pmf_system_shutdown(boothowto);

        if ((howto & RB_POWERDOWN) == RB_POWERDOWN)
                prom_halt(0x80);        /* rom monitor RB_PWOFF */

        /* Finally, halt/reboot the system. */
        printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
        prom_halt(howto & RB_HALT);
        /*NOTREACHED*/
}

void
delay(int n)
{

        DELAY(n);
}

void
cpu_intr(int ppl, vaddr_t pc, uint32_t status)
{
        curcpu()->ci_data.cpu_nintr++;

        /* device interrupts */
        (*hardware_intr)(ppl, pc, status);
}