xref: /openbmc/linux/arch/mips/boot/compressed/head.S (revision d87c25e8)
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994, 1995 Waldorf Electronics
7 * Written by Ralf Baechle and Andreas Busse
8 * Copyright (C) 1995 - 1999 Ralf Baechle
9 * Copyright (C) 1996 Paul M. Antoine
10 * Modified for DECStation and hence R3000 support by Paul M. Antoine
11 * Further modifications by David S. Miller and Harald Koerfgen
12 * Copyright (C) 1999 Silicon Graphics, Inc.
13 */
14
15#include <asm/asm.h>
16#include <asm/regdef.h>
17
18	LEAF(start)
19	/* Save boot rom start args */
20	move	s0, a0
21	move	s1, a1
22	move	s2, a2
23	move	s3, a3
24
25	/* Clear BSS */
26	PTR_LA	a0, _edata
27	PTR_LA	a2, _end
281:	sw	zero, 0(a0)
29	addiu	a0, a0, 4
30	bne	a2, a0, 1b
31
32	PTR_LA	a0, (.heap)	     /* heap address */
33	PTR_LA	sp, (.stack + 8192)  /* stack address */
34
35	PTR_LA	t9, decompress_kernel
36	jalr	t9
37
382:
39	move	a0, s0
40	move	a1, s1
41	move	a2, s2
42	move	a3, s3
43	PTR_LI	t9, KERNEL_ENTRY
44	jalr	t9
45
463:
47	b	3b
48
49	END(start)
50
51	.comm .heap,BOOT_HEAP_SIZE,4
52	.comm .stack,4096*2,4
53