/*      $NetBSD: kloader_machdep.c,v 1.3 2021/08/17 22:00:29 andvar Exp $       */

/*-
 * Copyright (C) 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 1.3 2021/08/17 22:00:29 andvar Exp $");

#include "debug_kloader.h"
#include "opt_cputypes.h"

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

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

#include <arm/cpufunc.h>
#if defined(CPU_XSCALE_PXA250) || defined(CPU_XSCALE_PXA270)
#include <arm/xscale/pxa2x0reg.h>
#endif

kloader_jumpfunc_t kloader_hpcarm_jump __attribute__((__noreturn__));
void kloader_hpcarm_reset(void);
#if defined(CPU_XSCALE_PXA250) || defined(CPU_XSCALE_PXA270)
kloader_bootfunc_t kloader_pxa2x0_boot __attribute__((__noreturn__));
#endif

struct kloader_ops kloader_hpcarm_ops = {
        .jump = kloader_hpcarm_jump,
#if defined(CPU_XSCALE_PXA250) || defined(CPU_XSCALE_PXA270)
        .boot = kloader_pxa2x0_boot,
#endif
        .reset = kloader_hpcarm_reset,
};

void
kloader_reboot_setup(const char *filename)
{

        __kloader_reboot_setup(&kloader_hpcarm_ops, filename);
}

void
kloader_hpcarm_reset(void)
{
        extern void (*__cpu_reset)(void) __dead;

        __cpu_reset();
        /*NOTREACHED*/
}

void
kloader_hpcarm_jump(kloader_bootfunc_t func, vaddr_t sp,
    struct kloader_bootinfo *kbi, struct kloader_page_tag *tag)
{

        disable_interrupts(I32_bit|F32_bit);    
        cpu_idcache_wbinv_all();

        /* jump to 2nd boot-loader */
        (*func)(kbi, tag);
        __builtin_unreachable();
}

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

#if defined(CPU_XSCALE_PXA250) || defined(CPU_XSCALE_PXA270)
        va = KERNEL_BASE + pa - PXA2X0_SDRAM0_START;
#else
#error  No support KLOADER with specific CPU type.
#endif
        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;
}