/* SPDX-License-Identifier: GPL-2.0 *//* * relocate_kernel.S - put the kernel image in place to boot */ #include <linux/linkage.h>#include <asm/assembler.h>#include <asm/asm-offsets.h>#include <asm/kexec.h> 	.align	3	/* not needed for this code, but keeps fncpy() happy */ ENTRY(relocate_new_kernel) 	adr	r7, relocate_new_kernel_end	ldr	r0, [r7, #KEXEC_INDIR_PAGE]	ldr	r1, [r7, #KEXEC_START_ADDR] 	/*	 * 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	beq	1f	bic	r4,r3,#1	b	0b1:	/* Is it an indirection page */	tst	r3,#2	beq	1f	bic	r0,r3,#2	b	0b1: 	/* are we done ? */	tst	r3,#4	beq	1f	b	2f 1:	/* is it source ? */	tst	r3,#8	beq	0b	bic r3,r3,#8	mov r6,#10249:	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, [r7, #KEXEC_MACH_TYPE]	ldr	r2, [r7, #KEXEC_R2] ARM(	ret	lr	) THUMB(	bx	lr	) ENDPROC(relocate_new_kernel) 	.align	3relocate_new_kernel_end: 	.globl relocate_new_kernel_sizerelocate_new_kernel_size:	.long relocate_new_kernel_end - relocate_new_kernel