freebsd-nq/stand/mips/uboot/start.S

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ArmAsm
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/*-
* Copyright (c) 2016 Stanislav Galabov
* 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 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <machine/asm.h>
.text
.extern _C_LABEL(main)
.weak _DYNAMIC
/*
* Entry point to the loader that U-Boot passes control to.
*/
ENTRY(_start)
PTR_S sp, uboot_address
j main
nop
END(_start)
/*
* syscall()
*/
ENTRY(syscall)
PTR_S ra, ret_address
PTR_L t9, syscall_ptr
jalr t9
nop
PTR_L ra, ret_address
jr ra
nop
END(syscall)
/*
* Data section
*/
.data
.align 8
.globl syscall_ptr
syscall_ptr:
.dword 0
.globl uboot_address
uboot_address:
.dword 0
ret_address:
.dword 0