/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright IBM Corp. 2005 * * Author(s): Rolf Adelsberger, *	      Heiko Carstens <heiko.carstens@de.ibm.com> * */ #include <linux/linkage.h>#include <asm/page.h>#include <asm/sigp.h> /* * moves the new kernel to its destination... * %r2 = pointer to first kimage_entry_t * %r3 = start address - where to jump to after the job is done... * * %r5 will be used as temp. storage * %r6 holds the destination address * %r7 = PAGE_SIZE * %r8 holds the source address * %r9 = PAGE_SIZE * * 0xf000 is a page_mask */ 	.textENTRY(relocate_kernel)		basr	%r13,0		# base address	.base:		lghi	%r7,PAGE_SIZE	# load PAGE_SIZE in r7		lghi	%r9,PAGE_SIZE	# load PAGE_SIZE in r9		lg	%r5,0(%r2)	# read another word for indirection page		aghi	%r2,8		# increment pointer		tml	%r5,0x1		# is it a destination page?		je	.indir_check	# NO, goto "indir_check"		lgr	%r6,%r5		# r6 = r5		nill	%r6,0xf000	# mask it out and...		j	.base		# ...next iteration	.indir_check:		tml	%r5,0x2		# is it a indirection page?		je	.done_test	# NO, goto "done_test"		nill	%r5,0xf000	# YES, mask out,		lgr	%r2,%r5		# move it into the right register,		j	.base		# and read next...	.done_test:		tml	%r5,0x4		# is it the done indicator?		je	.source_test	# NO! Well, then it should be the source indicator...		j	.done		# ok, lets finish it here...	.source_test:		tml	%r5,0x8		# it should be a source indicator...		je	.base		# NO, ignore it...		lgr	%r8,%r5		# r8 = r5		nill	%r8,0xf000	# masking	0:	mvcle	%r6,%r8,0x0	# copy PAGE_SIZE bytes from r8 to r6 - pad with 0		jo	0b		j	.base	.done:		sgr	%r0,%r0		# clear register r0		cghi	%r3,0		je	.diag		la	%r4,load_psw-.base(%r13)	# load psw-address into the register		o	%r3,4(%r4)	# or load address into psw		st	%r3,4(%r4)		mvc	0(8,%r0),0(%r4)	# copy psw to absolute address 0	.diag:		diag	%r0,%r0,0x308ENDPROC(relocate_kernel) 		.align	8	load_psw:		.long	0x00080000,0x80000000	relocate_kernel_end:	.align 8	.globl	relocate_kernel_len	relocate_kernel_len:		.quad	relocate_kernel_end - relocate_kernel