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https://github.com/edk2-porting/linux-next.git
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a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
207 lines
4.2 KiB
ArmAsm
207 lines
4.2 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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#include <asm/sigp.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_ASYNC
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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_ASYNC
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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_SYNC
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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_SYNC
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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,.Lcontinue_psw # Save PSW flags
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epsw %r2,%r3
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stm %r2,%r3,0(%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,SIGP_SET_ARCHITECTURE # 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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larl %r4,.Lcontinue_psw # Restore PSW flags
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lpswe 0(%r4)
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.Lcontinue:
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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 .data..nosave,"aw",@progbits
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.align 8
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.Lcontinue_psw:
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.quad 0,.Lcontinue
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.previous
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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_ASYNC
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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_ASYNC
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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_SYNC
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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_SYNC
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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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