/*      $NetBSD: kloader_machdep.c,v 1.8 2021/08/17 22:00:31 andvar Exp $       */

/*-
 * Copyright (C) 2009-2012 NONAKA Kimihiro <nonaka@netbsd.org>
 * 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 AUTHOR ``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 AUTHOR 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: kloader_machdep.c,v 1.8 2021/08/17 22:00:31 andvar Exp $");

#include "debug_kloader.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/disklabel.h>

#include <machine/kloader.h>
#include <machine/pmap.h>

#include <arm/cpufunc.h>
#include <arm/xscale/pxa2x0reg.h>

#include <zaurus/zaurus/zaurus_var.h>

#define KERNEL_TEXT_BASE        ((vaddr_t)&KERNEL_BASE_virt)

kloader_jumpfunc_t kloader_zaurus_jump __attribute__((__noreturn__));
kloader_bootfunc_t kloader_zaurus_boot __attribute__((__noreturn__));
void kloader_zaurus_reset(void);

struct kloader_ops kloader_zaurus_ops = {
        .jump = kloader_zaurus_jump,
        .boot = kloader_zaurus_boot,
        .reset = kloader_zaurus_reset,
};

void
kloader_reboot_setup(const char *filename)
{

        __kloader_reboot_setup(&kloader_zaurus_ops, filename);
}

void
kloader_zaurus_reset(void)
{

        zaurus_restart();
        /*NOTREACHED*/
}

void
kloader_zaurus_jump(kloader_bootfunc_t func, vaddr_t sp,
    struct kloader_bootinfo *kbi, struct kloader_page_tag *tag)
{
        extern int kloader_howto;
        extern char KERNEL_BASE_virt[];
        void (*bootinfop)(void *, void *);
        uint32_t *bootmagicp;
        vaddr_t ptr;
        struct bootinfo *bootinfo;
        struct btinfo_howto *bi_howto;
        struct btinfo_rootdevice *bi_rootdv;

        disable_interrupts(I32_bit|F32_bit);    

        /* copy 2nd boot-loader to va=pa page */
        bootinfop = (void *)(KERNEL_TEXT_BASE - PAGE_SIZE);
        memmove(bootinfop, func, PAGE_SIZE);

        /*
         * make bootinfo
         */
        bootmagicp = (uint32_t *)(KERNEL_TEXT_BASE - BOOTARGS_BUFSIZ);
        memset(bootmagicp, 0, BOOTARGS_BUFSIZ);
        bootinfo = (struct bootinfo *)(bootmagicp + 1);
        bootinfo->nentries = 0;
        ptr = (vaddr_t)bootinfo->info;

        /* pass to howto for new kernel */
        bi_howto = (struct btinfo_howto *)ptr;
        bi_howto->common.len = sizeof(struct btinfo_howto);
        bi_howto->common.type = BTINFO_HOWTO;
        bi_howto->howto = kloader_howto;
        bootinfo->nentries++;
        ptr += bi_howto->common.len;

        /* set previous root device for new boot device */
        if (root_device != NULL 
         && device_class(root_device) == DV_DISK
         && !device_is_a(root_device, "dk")) {
                bi_rootdv = (struct btinfo_rootdevice *)ptr;
                bi_rootdv->common.len = sizeof(struct btinfo_rootdevice);
                bi_rootdv->common.type = BTINFO_ROOTDEVICE;
                snprintf(bi_rootdv->devname, sizeof(bi_rootdv->devname), "%s%c",
                    device_xname(root_device), (int)DISKPART(rootdev) + 'a');
                bootinfo->nentries++;
                ptr += bi_rootdv->common.len;
        }

        *bootmagicp = BOOTARGS_MAGIC;
        cpu_idcache_wbinv_all();

        /* jump to 2nd boot-loader */
        (*bootinfop)(kbi, tag);

        /*NOTREACHED*/
        for (;;)
                continue;
}

/*
 * Physical address to virtual address
 */
vaddr_t
kloader_phystov(paddr_t pa)
{
        vaddr_t va;
        int error;

        va = KERNEL_BASE + pa - PXA2X0_SDRAM0_START;
        error = pmap_enter(pmap_kernel(), va, pa, VM_PROT_ALL, 0);
        if (error) {
                printf("%s: map failed: pa=0x%lx, va=0x%lx, error=%d\n",
                    __func__, pa, va, error);
        }
        return va;
}