ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+
[sfrench/cifs-2.6.git] / arch / arm / kernel / relocate_kernel.S
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
11 ENTRY(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
23 0:      /* 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
31 1:
32         /* Is it an indirection page */
33         tst     r3,#2,0
34         beq     1f
35         bic     r0,r3,#2
36         b       0b
37 1:
38
39         /* are we done ? */
40         tst     r3,#4,0
41         beq     1f
42         b       2f
43
44 1:
45         /* is it source ? */
46         tst     r3,#8,0
47         beq     0b
48         bic r3,r3,#8
49         mov r6,#1024
50 9:
51         ldr r5,[r3],#4
52         str r5,[r4],#4
53         subs r6,r6,#1
54         bne 9b
55         b 0b
56
57 2:
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
69 kexec_start_address:
70         .long   0x0
71
72         .globl kexec_indirection_page
73 kexec_indirection_page:
74         .long   0x0
75
76         .globl kexec_mach_type
77 kexec_mach_type:
78         .long   0x0
79
80         /* phy addr of the atags for the new kernel */
81         .globl kexec_boot_atags
82 kexec_boot_atags:
83         .long   0x0
84
85 ENDPROC(relocate_new_kernel)
86
87 relocate_new_kernel_end:
88
89         .globl relocate_new_kernel_size
90 relocate_new_kernel_size:
91         .long relocate_new_kernel_end - relocate_new_kernel
92
93