/*      $NetBSD: start.S,v 1.2 2017/04/29 00:05:35 nonaka Exp $ */

/*-
 * Copyright (C) 1999 Hewlett-Packard Co.
 *     Contributed by David Mosberger <davidm@hpl.hp.com>.
 * Copyright (C) 2005 Intel Co.
 *     Contributed by Fenghua Yu <fenghua.yu@intel.com>.
 * 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.
 * 3. Neither the name of Hewlett-Packard Co. 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 COPYRIGHT HOLDERS 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 COPYRIGHT
 * OWNER 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.
 */

/*
 * crt0-efi-x86_64.S - x86_64 EFI startup code.
 * $FreeBSD: head/sys/boot/efi/loader/arch/amd64/start.S 282727 2015-05-10 13:24:26Z ian $
 */

#include <machine/asm.h>
#include <sys/bootblock.h>

        .text
        .align 16
        .globl _start
_start:
        subq    $8, %rsp
        pushq   %rcx
        pushq   %rdx

0:
        lea     ImageBase(%rip), %rdi
        lea     _DYNAMIC(%rip), %rsi

        popq    %rcx
        popq    %rdx
        pushq   %rcx
        pushq   %rdx
        call    _C_LABEL(self_reloc)

        popq    %rdi
        popq    %rsi

        call    _C_LABEL(efi_main)
        addq    $8, %rsp

.Lexit:
        ret

        /*
         * hand-craft a dummy .reloc section so EFI knows it's a relocatable
         * executable:
         */

        .data
        .section .reloc, "a"
        .long   0
        .long   10
        .word   0

        /* boot parameters */
        .text
        .code16
        .align 512
.Lfake_bootxx:
        jmp     1f
        .balign 4
        .long   X86_BOOT_MAGIC_EFI      /* checked by installboot */
        .globl _C_LABEL(boot_params)
_C_LABEL(boot_params):                  /* space for patchable variables */
        .long   1f - boot_params        /* length of this data area */
#include <boot_params.S>
        . = .Lfake_bootxx + 0x80        /* Space for patching unknown params */
1: