/*      $NetBSD: machdep.c,v 1.36 2024/03/05 14:15:34 thorpej Exp $     */

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.36 2024/03/05 14:15:34 thorpej Exp $");

#include "opt_ddb.h"
#include "opt_kloader.h"
#include "opt_kloader_kernel_path.h"

#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/device.h>

#include <uvm/uvm.h>
#include <uvm/uvm_extern.h>

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

#include <dev/cons.h>   /* cntab access (cpu_reboot) */
#include <machine/bootinfo.h>
#include <machine/locore.h>
#include <machine/psl.h>
#include <machine/intr.h>/* hardintr_init */
#include <playstation2/playstation2/sifbios.h>
#include <playstation2/playstation2/interrupt.h>

#if defined KLOADER_KERNEL_PATH && !defined KLOADER
#error "define KLOADER"
#endif
#ifdef KLOADER
#include <machine/kloader.h>
#endif

struct cpu_info cpu_info_store;

struct vm_map *phys_map;
phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
int mem_cluster_cnt;

#ifdef DEBUG
static void bootinfo_dump(void);
#endif

void mach_init(void);
/*
 * Do all the stuff that locore normally does before calling main().
 */
void
mach_init(void)
{
        extern char kernel_text[], edata[], end[];
        char *kernend;
        struct pcb *pcb0;
        vaddr_t v;
        paddr_t start;
        size_t size;

        /*
         * Clear the BSS segment.
         */
        kernend = (void *)mips_round_page(end);
        memset(edata, 0, kernend - edata);

        /* disable all interrupt */
        interrupt_init_bootstrap();

        /* enable SIF BIOS */
        sifbios_init();

        consinit();

        printf("kernel_text=%p edata=%p end=%p\n", kernel_text, edata, end);

#ifdef DEBUG
        bootinfo_dump();
#endif
        uvm_md_init();

        physmem = atop(PS2_MEMORY_SIZE);

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

        /*
         * Load the rest of the available pages into the VM system.
         */
        start = (paddr_t)round_page(MIPS_KSEG0_TO_PHYS(kernend));
        size = PS2_MEMORY_SIZE - start - BOOTINFO_BLOCK_SIZE;
        memset((void *)MIPS_PHYS_TO_KSEG1(start), 0, size);
            
        /* kernel itself */
        mem_clusters[0].start = trunc_page(MIPS_KSEG0_TO_PHYS(kernel_text));
        mem_clusters[0].size = start - mem_clusters[0].start;
        /* heap */
        mem_clusters[1].start = start;
        mem_clusters[1].size = size;
        /* load */
        printf("load memory %#x, %#lx\n", start, size);
        uvm_page_physload(atop(start), atop(start + size),
            atop(start), atop(start + size), VM_FREELIST_DEFAULT);

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

        pmap_bootstrap();

        /*
         * Allocate uarea page for lwp0 and set it.
         */
        v = uvm_pageboot_alloc(USPACE);

        pcb0 = lwp_getpcb(&lwp0);
        pcb0->pcb_context.val[_L_SR] = PSL_LOWIPL;      /* SR */
#ifdef IPL_ICU_MASK
        pcb0->pcb_ppl = 0;
#endif

        lwp0.l_md.md_utf = (struct trapframe *)(v + USPACE) - 1;
}

/*
 * Allocate memory for variable-sized tables,
 */
void
cpu_startup(void)
{
        cpu_startup_common();
}

void
cpu_reboot(int howto, char *bootstr)
{
#ifdef KLOADER
        struct kloader_bootinfo kbi;
#endif
        static int waittime = -1;

        /* Take a snapshot before clobbering any registers. */
        if (curlwp)
                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;
        }

#ifdef KLOADER
        /* No bootinfo is required. */
        kloader_bootinfo_set(&kbi, 0, NULL, NULL, true);
#ifndef KLOADER_KERNEL_PATH
#define KLOADER_KERNEL_PATH     "/netbsd"
#endif
        if ((howto & RB_HALT) == 0)
                kloader_reboot_setup(KLOADER_KERNEL_PATH);
#endif

        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)
                sifbios_halt(0); /* power down */
        else if (howto & RB_HALT)
                sifbios_halt(1); /* halt */
        else {
#ifdef KLOADER
                kloader_reboot();
                /* NOTREACHED */
#endif
                sifbios_halt(2); /* reset */
        }

        while (1)
                ;
        /* NOTREACHED */
}

#ifdef DEBUG
void
bootinfo_dump(void)
{
        printf("devconf=%#x, option=%#x, rtc=%#x, pcmcia_type=%#x,"
            "sysconf=%#x\n",
            BOOTINFO_REF(BOOTINFO_DEVCONF),
            BOOTINFO_REF(BOOTINFO_OPTION_PTR),
            BOOTINFO_REF(BOOTINFO_RTC),
            BOOTINFO_REF(BOOTINFO_PCMCIA_TYPE), 
            BOOTINFO_REF(BOOTINFO_SYSCONF));
}
#endif /* DEBUG */