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

/*-
* Copyright (C) 1999 Hewlett-Packard Co.
*     Contributed by David Mosberger <[email protected]>.
* Copyright (C) 2005 Intel Co.
*     Contributed by Fenghua Yu <[email protected]>.
* 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:

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