[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / kernel / relocate_kernel.S

/*
 * relocate_kernel.S - put the kernel image in place to boot
 */

#include <linux/linkage.h>
#include <asm/kexec.h>

	.align	3	/* not needed for this code, but keeps fncpy() happy */

ENTRY(relocate_new_kernel)

	ldr	r0,kexec_indirection_page
	ldr	r1,kexec_start_address

	/*
	 * If there is no indirection page (we are doing crashdumps)
	 * skip any relocation.
	 */
	cmp	r0, #0
	beq	2f

0:	/* top, read another word for the indirection page */
	ldr	r3, [r0],#4

	/* Is it a destination page. Put destination address to r4 */
	tst	r3,#1,0
	beq	1f
	bic	r4,r3,#1
	b	0b
1:
	/* Is it an indirection page */
	tst	r3,#2,0
	beq	1f
	bic	r0,r3,#2
	b	0b
1:

	/* are we done ? */
	tst	r3,#4,0
	beq	1f
	b	2f

1:
	/* is it source ? */
	tst	r3,#8,0
	beq	0b
	bic r3,r3,#8
	mov r6,#1024
9:
	ldr r5,[r3],#4
	str r5,[r4],#4
	subs r6,r6,#1
	bne 9b
	b 0b

2:
	/* Jump to relocated kernel */
	mov lr,r1
	mov r0,#0
	ldr r1,kexec_mach_type
	ldr r2,kexec_boot_atags
 ARM(	mov pc, lr	)
 THUMB(	bx lr		)

	.align

	.globl kexec_start_address
kexec_start_address:
	.long	0x0

	.globl kexec_indirection_page
kexec_indirection_page:
	.long	0x0

	.globl kexec_mach_type
kexec_mach_type:
	.long	0x0

	/* phy addr of the atags for the new kernel */
	.globl kexec_boot_atags
kexec_boot_atags:
	.long	0x0

ENDPROC(relocate_new_kernel)

relocate_new_kernel_end:

	.globl relocate_new_kernel_size
relocate_new_kernel_size:
	.long relocate_new_kernel_end - relocate_new_kernel
Commit	Line	Data
c587e4a6 RP	1	/*
	2	* relocate_kernel.S - put the kernel image in place to boot
	3	*/
	4
9b21d378	5	#include <linux/linkage.h>
c587e4a6 RP	6	#include <asm/kexec.h>
c587e4a6 RP	7
9b21d378 DM	8	.align 3 /* not needed for this code, but keeps fncpy() happy */
	9
	10	ENTRY(relocate_new_kernel)
c587e4a6 RP	11
	12	ldr r0,kexec_indirection_page
	13	ldr r1,kexec_start_address
	14
8594a0c3 MW	15	/*
	16	* If there is no indirection page (we are doing crashdumps)
	17	* skip any relocation.
	18	*/
	19	cmp r0, #0
	20	beq 2f
c587e4a6 RP	21
	22	0: /* top, read another word for the indirection page */
	23	ldr r3, [r0],#4
	24
	25	/* Is it a destination page. Put destination address to r4 */
	26	tst r3,#1,0
	27	beq 1f
	28	bic r4,r3,#1
	29	b 0b
	30	1:
	31	/* Is it an indirection page */
	32	tst r3,#2,0
	33	beq 1f
	34	bic r0,r3,#2
	35	b 0b
	36	1:
	37
	38	/* are we done ? */
	39	tst r3,#4,0
	40	beq 1f
	41	b 2f
	42
	43	1:
	44	/* is it source ? */
	45	tst r3,#8,0
	46	beq 0b
	47	bic r3,r3,#8
	48	mov r6,#1024
	49	9:
	50	ldr r5,[r3],#4
	51	str r5,[r4],#4
	52	subs r6,r6,#1
	53	bne 9b
	54	b 0b
	55
	56	2:
	57	/* Jump to relocated kernel */
	58	mov lr,r1
	59	mov r0,#0
	60	ldr r1,kexec_mach_type
4cd9d6f7	61	ldr r2,kexec_boot_atags
552e0c8d WD	62	ARM( mov pc, lr )
552e0c8d WD	63	THUMB( bx lr )
c587e4a6	64
bc8b57f0 DM	65	.align
bc8b57f0 DM	66
c587e4a6 RP	67	.globl kexec_start_address
	68	kexec_start_address:
	69	.long 0x0
	70
	71	.globl kexec_indirection_page
	72	kexec_indirection_page:
	73	.long 0x0
	74
	75	.globl kexec_mach_type
	76	kexec_mach_type:
	77	.long 0x0
	78
4cd9d6f7 RP	79	/* phy addr of the atags for the new kernel */
	80	.globl kexec_boot_atags
	81	kexec_boot_atags:
033b8ffe MW	82	.long 0x0
033b8ffe MW	83
9b21d378 DM	84	ENDPROC(relocate_new_kernel)
9b21d378 DM	85
c587e4a6 RP	86	relocate_new_kernel_end:
	87
	88	.globl relocate_new_kernel_size
	89	relocate_new_kernel_size:
	90	.long relocate_new_kernel_end - relocate_new_kernel
	91
	92