/* * Copyright IBM Corp. 2005 * * Author(s): Rolf Adelsberger, *	      Heiko Carstens <heiko.carstens@de.ibm.com> * */ #include <linux/linkage.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 * %r10 is a page mask */ 	.textENTRY(relocate_kernel)		basr	%r13,0		# base address	.base:		stnsm	sys_msk-.base(%r13),0xfb	# disable DAT		stctl	%c0,%c15,ctlregs-.base(%r13)		stm	%r0,%r15,gprregs-.base(%r13)		la	%r1,load_psw-.base(%r13)		mvc	0(8,%r0),0(%r1)		la	%r0,.back-.base(%r13)		st	%r0,4(%r0)		oi	4(%r0),0x80		mvc	0x68(8,%r0),0(%r1)		la	%r0,.back_pgm-.base(%r13)		st	%r0,0x6c(%r0)		oi	0x6c(%r0),0x80		lhi	%r0,0		diag	%r0,%r0,0x308	.back:		basr	%r13,0	.back_base:		oi	have_diag308-.back_base(%r13),0x01		lctl	%c0,%c15,ctlregs-.back_base(%r13)		lm	%r0,%r15,gprregs-.back_base(%r13)		j	.start_reloc	.back_pgm:		lm	%r0,%r15,gprregs-.base(%r13)	.start_reloc:		lhi	%r10,-1		# preparing the mask		sll	%r10,12		# shift it such that it becomes 0xf000	.top:		lhi	%r7,4096	# load PAGE_SIZE in r7		lhi	%r9,4096	# load PAGE_SIZE in r9		l	%r5,0(%r2)	# read another word for indirection page		ahi	%r2,4		# increment pointer		tml	%r5,0x1		# is it a destination page?		je	.indir_check	# NO, goto "indir_check"		lr	%r6,%r5		# r6 = r5		nr	%r6,%r10	# mask it out and...		j	.top		# ...next iteration	.indir_check:		tml	%r5,0x2		# is it a indirection page?		je	.done_test	# NO, goto "done_test"		nr	%r5,%r10	# YES, mask out,		lr	%r2,%r5		# move it into the right register,		j	.top		# 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	.top		# NO, ignore it...		lr	%r8,%r5		# r8 = r5		nr	%r8,%r10	# masking	0:	mvcle	%r6,%r8,0x0	# copy PAGE_SIZE bytes from r8 to r6 - pad with 0		jo	0b		j	.top	.done:		sr	%r0,%r0		# clear register r0		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		tm	have_diag308-.base(%r13),0x01		jno	.no_diag308		diag	%r0,%r0,0x308	.no_diag308:		sr	%r1,%r1		# clear %r1		sr	%r2,%r2		# clear %r2		sigp	%r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero		lpsw	0		# hopefully start new kernel... 		.align	8	load_psw:		.long	0x00080000,0x80000000	sys_msk:		.quad	0	ctlregs:		.rept	16		.long	0		.endr	gprregs:		.rept	16		.long	0		.endr	have_diag308:		.byte	0		.align	8	relocate_kernel_end:	.align 8	.globl	relocate_kernel_len	relocate_kernel_len:		.quad	relocate_kernel_end - relocate_kernel