1/*
 2 * relocate_kernel.S - put the kernel image in place to boot
 3 */
 4
 5#include <linux/linkage.h>
 6#include <asm/assembler.h>
 7#include <asm/kexec.h>
 8
 9	.align	3	/* not needed for this code, but keeps fncpy() happy */
10
11ENTRY(relocate_new_kernel)
12
13	ldr	r0,kexec_indirection_page
14	ldr	r1,kexec_start_address
15
16	/*
17	 * If there is no indirection page (we are doing crashdumps)
18	 * skip any relocation.
19	 */
20	cmp	r0, #0
21	beq	2f
22
230:	/* top, read another word for the indirection page */
24	ldr	r3, [r0],#4
25
26	/* Is it a destination page. Put destination address to r4 */
27	tst	r3,#1,0
28	beq	1f
29	bic	r4,r3,#1
30	b	0b
311:
32	/* Is it an indirection page */
33	tst	r3,#2,0
34	beq	1f
35	bic	r0,r3,#2
36	b	0b
371:
38
39	/* are we done ? */
40	tst	r3,#4,0
41	beq	1f
42	b	2f
43
441:
45	/* is it source ? */
46	tst	r3,#8,0
47	beq	0b
48	bic r3,r3,#8
49	mov r6,#1024
509:
51	ldr r5,[r3],#4
52	str r5,[r4],#4
53	subs r6,r6,#1
54	bne 9b
55	b 0b
56
572:
58	/* Jump to relocated kernel */
59	mov lr,r1
60	mov r0,#0
61	ldr r1,kexec_mach_type
62	ldr r2,kexec_boot_atags
63 ARM(	ret lr	)
64 THUMB(	bx lr		)
65
66	.align
67
68	.globl kexec_start_address
69kexec_start_address:
70	.long	0x0
71
72	.globl kexec_indirection_page
73kexec_indirection_page:
74	.long	0x0
75
76	.globl kexec_mach_type
77kexec_mach_type:
78	.long	0x0
79
80	/* phy addr of the atags for the new kernel */
81	.globl kexec_boot_atags
82kexec_boot_atags:
83	.long	0x0
84
85ENDPROC(relocate_new_kernel)
86
87relocate_new_kernel_end:
88
89	.globl relocate_new_kernel_size
90relocate_new_kernel_size:
91	.long relocate_new_kernel_end - relocate_new_kernel
92
93

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * relocate_kernel.S - put the kernel image in place to boot
 4 */
 5
 6#include <linux/linkage.h>
 7#include <asm/assembler.h>
 8#include <asm/kexec.h>
 9
10	.align	3	/* not needed for this code, but keeps fncpy() happy */
11
12ENTRY(relocate_new_kernel)
13
14	ldr	r0,kexec_indirection_page
15	ldr	r1,kexec_start_address
16
17	/*
18	 * If there is no indirection page (we are doing crashdumps)
19	 * skip any relocation.
20	 */
21	cmp	r0, #0
22	beq	2f
23
240:	/* top, read another word for the indirection page */
25	ldr	r3, [r0],#4
26
27	/* Is it a destination page. Put destination address to r4 */
28	tst	r3,#1,0
29	beq	1f
30	bic	r4,r3,#1
31	b	0b
321:
33	/* Is it an indirection page */
34	tst	r3,#2,0
35	beq	1f
36	bic	r0,r3,#2
37	b	0b
381:
39
40	/* are we done ? */
41	tst	r3,#4,0
42	beq	1f
43	b	2f
44
451:
46	/* is it source ? */
47	tst	r3,#8,0
48	beq	0b
49	bic r3,r3,#8
50	mov r6,#1024
519:
52	ldr r5,[r3],#4
53	str r5,[r4],#4
54	subs r6,r6,#1
55	bne 9b
56	b 0b
57
582:
59	/* Jump to relocated kernel */
60	mov lr,r1
61	mov r0,#0
62	ldr r1,kexec_mach_type
63	ldr r2,kexec_boot_atags
64 ARM(	ret lr	)
65 THUMB(	bx lr		)
66
67	.align
68
69	.globl kexec_start_address
70kexec_start_address:
71	.long	0x0
72
73	.globl kexec_indirection_page
74kexec_indirection_page:
75	.long	0x0
76
77	.globl kexec_mach_type
78kexec_mach_type:
79	.long	0x0
80
81	/* phy addr of the atags for the new kernel */
82	.globl kexec_boot_atags
83kexec_boot_atags:
84	.long	0x0
85
86ENDPROC(relocate_new_kernel)
87
88relocate_new_kernel_end:
89
90	.globl relocate_new_kernel_size
91relocate_new_kernel_size:
92	.long relocate_new_kernel_end - relocate_new_kernel
93
94