* Copyright (c) 2000 The NetBSD Foundation, Inc.

/* $NetBSD: start.S,v 1.7 2008/04/28 20:23:16 martin Exp $ */

/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Wayne Knowles
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

#include <mips/asm.h>
#include <mips/cache_r4k.h>

LEAF(start)
.set noreorder
.set mips3
#ifdef __GP_SUPPORT__
la gp, _C_LABEL (_gp)
#endif
la sp, start - CALLFRAME_SIZ
sw zero, CALLFRAME_RA(sp) # clear ra for debugger
sw zero, CALLFRAME_SP(sp) # clear fp for debugger
move s0, a0 # save argc
move s1, a1 # save argv

jal _C_LABEL(flushcache)
nop

la a0, _C_LABEL (edata) # clear BSS
move a1, zero
la a2, _C_LABEL (end)
jal _C_LABEL(memset) # memset(edata, 0, end - edata)
subu a2, a2, a0

move a0, s0 # restore argc
jal _C_LABEL(main) # main(unsigned int)
move a1, s1 # restore argv

XLEAF(_rtt)
jal _C_LABEL(cpu_reboot) # failed, reboot
nop
END(start)

LEAF(flushcache)
li t0, 0x80000000
addu t1, t0, 32*1024 /* flush 32KB */
subu t1, t1, 0x100 /* per 256 bytes */

1:
/* flush I-cache */
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x000(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x020(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x040(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x060(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x080(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x0a0(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x0c0(t0)
cache CACHE_R4K_I | CACHEOP_R4K_INDEX_INV, 0x0e0(t0)

/* flush D-cache */
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x000(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x020(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x040(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x060(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x080(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x0a0(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x0c0(t0)
cache CACHE_R4K_D | CACHEOP_R4K_INDEX_WB_INV, 0x0e0(t0)

bne t0, t1, 1b
addu t0, t0, 0x100

j ra
nop
END(flushcache)