mirror of https://gitee.com/openkylin/linux.git
194 lines
3.9 KiB
ArmAsm
194 lines
3.9 KiB
ArmAsm
/*
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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 <heiko.carstens@de.ibm.com>
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* Michael Holzheu <holzheu@de.ibm.com>
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*/
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#include <linux/linkage.h>
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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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ENTRY(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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.align 8
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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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ENTRY(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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.align 8
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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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ENTRY(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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.align 8
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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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#
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# Calls diag 308 subcode 1 and continues execution
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#
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# The following conditions must be ensured before calling this function:
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# * Prefix register = 0
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# * Lowcore protection is disabled
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#
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ENTRY(diag308_reset)
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larl %r4,.Lctlregs # Save control registers
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stctg %c0,%c15,0(%r4)
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larl %r4,.Lfpctl # Floating point control register
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stfpc 0(%r4)
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larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0
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lghi %r3,0
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lg %r4,0(%r4) # Save PSW
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sturg %r4,%r3 # Use sturg, because of large pages
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lghi %r1,1
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diag %r1,%r1,0x308
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.Lrestart_part2:
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lhi %r0,0 # Load r0 with zero
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lhi %r1,2 # Use mode 2 = ESAME (dump)
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sigp %r1,%r0,0x12 # Switch to ESAME mode
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sam64 # Switch to 64 bit addressing mode
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larl %r4,.Lctlregs # Restore control registers
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lctlg %c0,%c15,0(%r4)
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larl %r4,.Lfpctl # Restore floating point ctl register
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lfpc 0(%r4)
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br %r14
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.align 16
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.Lrestart_psw:
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.long 0x00080000,0x80000000 + .Lrestart_part2
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.section .bss
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.align 8
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.Lctlregs:
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.rept 16
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.quad 0
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.endr
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.Lfpctl:
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.long 0
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.previous
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#else /* CONFIG_64BIT */
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ENTRY(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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.align 4
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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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ENTRY(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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.align 4
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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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ENTRY(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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.align 4
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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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