mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-08-08 05:29:10 -04:00
112 lines
2.8 KiB
ArmAsm
112 lines
2.8 KiB
ArmAsm
/* $NetBSD: start.S,v 1.2 2003/02/07 17:52:08 cgd Exp $ */
|
|
|
|
/*
|
|
* Copyright 2000, 2001
|
|
* Broadcom Corporation. All rights reserved.
|
|
*
|
|
* This software is furnished under license and may be used and copied only
|
|
* in accordance with the following terms and conditions. Subject to these
|
|
* conditions, you may download, copy, install, use, modify and distribute
|
|
* modified or unmodified copies of this software in source and/or binary
|
|
* form. No title or ownership is transferred hereby.
|
|
*
|
|
* 1) Any source code used, modified or distributed must reproduce and
|
|
* retain this copyright notice and list of conditions as they appear in
|
|
* the source file.
|
|
*
|
|
* 2) No right is granted to use any trade name, trademark, or logo of
|
|
* Broadcom Corporation. The "Broadcom Corporation" name may not be
|
|
* used to endorse or promote products derived from this software
|
|
* without the prior written permission of Broadcom Corporation.
|
|
*
|
|
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
|
|
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
|
|
* FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
|
|
* LIABLE FOR 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), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#define STACK_SIZE 8192
|
|
|
|
#include "include/asm.h"
|
|
|
|
|
|
.bss
|
|
|
|
.comm stack_bottom,STACK_SIZE
|
|
|
|
.text
|
|
|
|
LEAF(start)
|
|
|
|
la gp,_gp
|
|
|
|
la sp,stack_bottom+STACK_SIZE-32
|
|
|
|
/*
|
|
* On entry: a0 = the firmware handle, a2 = firmware's
|
|
* for secondary bootstraps, a1 is the booted device handle
|
|
* Don't trash a0..a3 until main is called!
|
|
*/
|
|
|
|
|
|
#if defined(STANDALONE_PROGRAM)
|
|
/*
|
|
* This should not be used anywhere.
|
|
*/
|
|
|
|
#error "don't do this."
|
|
|
|
#else /* defined(STANDALONE_PROGRAM) */
|
|
|
|
#if !defined(PRIMARY_BOOTBLOCK) && !defined(UNIFIED_BOOTBLOCK)
|
|
|
|
la sp,start
|
|
|
|
#endif /* !defined(PRIMARY_BOOTBLOCK) && !defined(UNIFIED_BOOTBLOCK) */
|
|
|
|
#endif /* defined(STANDALONE_PROGRAM) */
|
|
|
|
/*
|
|
* Zero BSS
|
|
*/
|
|
|
|
la t0,_edata /* t0 = address */
|
|
la t1,_end
|
|
|
|
1: sw zero,0(t0)
|
|
sw zero,4(t0)
|
|
sw zero,8(t0)
|
|
sw zero,16(t0)
|
|
add t0,16
|
|
ble t0,t1,1b
|
|
|
|
|
|
/*
|
|
* Run the main program.
|
|
*/
|
|
|
|
jal main /* transfer to C */
|
|
|
|
XLEAF(halt)
|
|
li t0,0xBFC00000 /* transfer back to firmware */
|
|
j t0
|
|
END(start)
|
|
|
|
|
|
|
|
LEAF(__main)
|
|
j ra
|
|
END(__main)
|
|
|
|
LEAF(_rtt)
|
|
li t0,0xBFC00000
|
|
j t0
|
|
END(_rtt)
|