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/arch/mips/boot/compressed/head.S

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
Assembly | 56 lines | 50 code | 6 blank | 0 comment | 2 complexity | 46fb2f941fda458e5ab142d45c3a4c21 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 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	.set noreorder
19	.cprestore
20	LEAF(start)
21start:
22	/* Save boot rom start args */
23	move	s0, a0
24	move	s1, a1
25	move	s2, a2
26	move	s3, a3
27
28	/* Clear BSS */
29	PTR_LA	a0, _edata
30	PTR_LA	a2, _end
311:	sw	zero, 0(a0)
32	bne	a2, a0, 1b
33	 addiu	a0, a0, 4
34
35	PTR_LA	a0, (.heap)          /* heap address */
36	PTR_LA  sp, (.stack + 8192)  /* stack address */
37
38	PTR_LA	ra, 2f
39	PTR_LA	k0, decompress_kernel
40	jr	k0
41	 nop
422:
43	move	a0, s0
44	move	a1, s1
45	move	a2, s2
46	move	a3, s3
47	PTR_LI	k0, KERNEL_ENTRY
48	jr	k0
49	 nop
503:
51	b	3b
52	 nop
53	END(start)
54
55	.comm .heap,BOOT_HEAP_SIZE,4
56	.comm .stack,4096*2,4