1/*
 2 * arch/xtensa/boot/boot-elf/bootstrap.S
 3 *
 4 * Low-level exception handling
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 *
10 * Copyright (C) 2004 - 2013 by Tensilica Inc.
11 *
12 * Chris Zankel <chris@zankel.net>
13 * Marc Gauthier <marc@tensilica.com>
14 * Piet Delaney <piet@tensilica.com>
15 */
16
17#include <asm/bootparam.h>
18#include <asm/processor.h>
19#include <asm/pgtable.h>
20#include <asm/page.h>
21#include <asm/cacheasm.h>
22#include <asm/initialize_mmu.h>
23#include <asm/vectors.h>
24#include <linux/linkage.h>
25
26	.section	.ResetVector.text, "ax"
27	.global         _ResetVector
28	.global         reset
29
30_ResetVector:
31	_j _SetupMMU
32
33	.begin  no-absolute-literals
34	.literal_position
35
 
36	.align 4
37RomInitAddr:
38#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
39	XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
40	.word	CONFIG_KERNEL_LOAD_ADDRESS
41#else
42	.word	KERNELOFFSET
43#endif
44RomBootParam:
45	.word _bootparam
46_bootparam:
47	.short	BP_TAG_FIRST
48	.short	4
49	.long	BP_VERSION
50	.short	BP_TAG_LAST
51	.short	0
52	.long	0
 
53
54	.align  4
55_SetupMMU:
56	movi	a0, 0
57	wsr	a0, windowbase
58	rsync
59	movi	a0, 1
60	wsr	a0, windowstart
61	rsync
62	movi	a0, 0x1F
63	wsr	a0, ps
64	rsync
65
66#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
67	initialize_mmu
68#endif
69
70	.end    no-absolute-literals
71
72	rsil    a0, XCHAL_DEBUGLEVEL-1
73	rsync
74reset:
75	l32r    a0, RomInitAddr
76	l32r	a2, RomBootParam
 
 
 
 
 
 
 
 
 
77	movi	a3, 0
78	movi	a4, 0
79	jx      a0

 1/*
 2 * arch/xtensa/boot/boot-elf/bootstrap.S
 3 *
 4 * Low-level exception handling
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 *
10 * Copyright (C) 2004 - 2013 by Tensilica Inc.
11 *
12 * Chris Zankel <chris@zankel.net>
13 * Marc Gauthier <marc@tensilica.com>
14 * Piet Delaney <piet@tensilica.com>
15 */
16
17#include <asm/bootparam.h>
 
 
 
 
18#include <asm/initialize_mmu.h>
19#include <asm/vectors.h>
20#include <linux/linkage.h>
21
22	.section	.ResetVector.text, "ax"
23	.global         _ResetVector
24	.global         reset
25
26_ResetVector:
27	_j _SetupMMU
28
29	.begin  no-absolute-literals
30	.literal_position
31
32#ifdef CONFIG_PARSE_BOOTPARAM
33	.align 4
 
 
 
 
 
 
 
 
 
34_bootparam:
35	.short	BP_TAG_FIRST
36	.short	4
37	.long	BP_VERSION
38	.short	BP_TAG_LAST
39	.short	0
40	.long	0
41#endif
42
43	.align  4
44_SetupMMU:
45	movi	a0, 0
46	wsr	a0, windowbase
47	rsync
48	movi	a0, 1
49	wsr	a0, windowstart
50	rsync
51	movi	a0, 0x1F
52	wsr	a0, ps
53	rsync
54
55#ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
56	initialize_mmu
57#endif
58
 
 
59	rsil    a0, XCHAL_DEBUGLEVEL-1
60	rsync
61reset:
62#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
63	XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
64	movi	a0, CONFIG_KERNEL_LOAD_ADDRESS
65#else
66	movi	a0, KERNELOFFSET
67#endif
68#ifdef CONFIG_PARSE_BOOTPARAM
69	movi	a2, _bootparam
70#else
71	movi	a2, 0
72#endif
73	movi	a3, 0
74	movi	a4, 0
75	jx      a0
76
77	.end    no-absolute-literals