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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/s390/kernel/base.S
10817 views
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/*

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 *  arch/s390/kernel/base.S

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 *

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 *    Copyright IBM Corp. 2006,2007

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 *    Author(s): Heiko Carstens <[email protected]>

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 *		 Michael Holzheu <[email protected]>

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 */

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#include <asm/asm-offsets.h>

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#include <asm/ptrace.h>

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#ifdef CONFIG_64BIT

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	.globl	s390_base_mcck_handler

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s390_base_mcck_handler:

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	basr	%r13,0

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0:	lg	%r15,__LC_PANIC_STACK	# load panic stack

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	aghi	%r15,-STACK_FRAME_OVERHEAD

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	larl	%r1,s390_base_mcck_handler_fn

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	lg	%r1,0(%r1)

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	ltgr	%r1,%r1

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	jz	1f

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	basr	%r14,%r1

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1:	la	%r1,4095

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	lmg	%r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)

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	lpswe	__LC_MCK_OLD_PSW

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	.section .bss

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	.globl	s390_base_mcck_handler_fn

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s390_base_mcck_handler_fn:

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	.quad	0

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	.previous

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	.globl	s390_base_ext_handler

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s390_base_ext_handler:

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	stmg	%r0,%r15,__LC_SAVE_AREA

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	basr	%r13,0

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0:	aghi	%r15,-STACK_FRAME_OVERHEAD

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	larl	%r1,s390_base_ext_handler_fn

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	lg	%r1,0(%r1)

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	ltgr	%r1,%r1

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	jz	1f

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	basr	%r14,%r1

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1:	lmg	%r0,%r15,__LC_SAVE_AREA

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	ni	__LC_EXT_OLD_PSW+1,0xfd	# clear wait state bit

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	lpswe	__LC_EXT_OLD_PSW

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	.section .bss

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	.globl s390_base_ext_handler_fn

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s390_base_ext_handler_fn:

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	.quad	0

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	.previous

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	.globl	s390_base_pgm_handler

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s390_base_pgm_handler:

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	stmg	%r0,%r15,__LC_SAVE_AREA

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	basr	%r13,0

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0:	aghi	%r15,-STACK_FRAME_OVERHEAD

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	larl	%r1,s390_base_pgm_handler_fn

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	lg	%r1,0(%r1)

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	ltgr	%r1,%r1

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	jz	1f

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	basr	%r14,%r1

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	lmg	%r0,%r15,__LC_SAVE_AREA

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	lpswe	__LC_PGM_OLD_PSW

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1:	lpswe	disabled_wait_psw-0b(%r13)

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	.align	8

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disabled_wait_psw:

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	.quad	0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler

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	.section .bss

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	.globl s390_base_pgm_handler_fn

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s390_base_pgm_handler_fn:

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	.quad	0

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	.previous

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#else /* CONFIG_64BIT */

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	.globl	s390_base_mcck_handler

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s390_base_mcck_handler:

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	basr	%r13,0

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0:	l	%r15,__LC_PANIC_STACK	# load panic stack

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	ahi	%r15,-STACK_FRAME_OVERHEAD

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	l	%r1,2f-0b(%r13)

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	l	%r1,0(%r1)

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	ltr	%r1,%r1

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	jz	1f

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	basr	%r14,%r1

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1:	lm	%r0,%r15,__LC_GPREGS_SAVE_AREA

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	lpsw	__LC_MCK_OLD_PSW

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2:	.long	s390_base_mcck_handler_fn

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	.section .bss

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	.globl	s390_base_mcck_handler_fn

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s390_base_mcck_handler_fn:

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	.long	0

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	.previous

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	.globl	s390_base_ext_handler

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s390_base_ext_handler:

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	stm	%r0,%r15,__LC_SAVE_AREA

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	basr	%r13,0

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0:	ahi	%r15,-STACK_FRAME_OVERHEAD

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	l	%r1,2f-0b(%r13)

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	l	%r1,0(%r1)

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	ltr	%r1,%r1

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	jz	1f

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	basr	%r14,%r1

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1:	lm	%r0,%r15,__LC_SAVE_AREA

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	ni	__LC_EXT_OLD_PSW+1,0xfd	# clear wait state bit

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	lpsw	__LC_EXT_OLD_PSW

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2:	.long	s390_base_ext_handler_fn

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	.section .bss

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	.globl	s390_base_ext_handler_fn

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s390_base_ext_handler_fn:

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	.long	0

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	.previous

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	.globl	s390_base_pgm_handler

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s390_base_pgm_handler:

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	stm	%r0,%r15,__LC_SAVE_AREA

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	basr	%r13,0

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0:	ahi	%r15,-STACK_FRAME_OVERHEAD

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	l	%r1,2f-0b(%r13)

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	l	%r1,0(%r1)

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	ltr	%r1,%r1

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	jz	1f

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	basr	%r14,%r1

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	lm	%r0,%r15,__LC_SAVE_AREA

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	lpsw	__LC_PGM_OLD_PSW

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1:	lpsw	disabled_wait_psw-0b(%r13)

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2:	.long	s390_base_pgm_handler_fn

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disabled_wait_psw:

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	.align	8

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	.long	0x000a0000,0x00000000 + s390_base_pgm_handler

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	.section .bss

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	.globl	s390_base_pgm_handler_fn

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s390_base_pgm_handler_fn:

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	.long	0

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	.previous

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#endif /* CONFIG_64BIT */

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