156 строки
4.8 KiB
ArmAsm
156 строки
4.8 KiB
ArmAsm
/*
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* Copyright IBM Corp 2000, 2011
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* Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
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* Denis Joseph Barrow,
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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/sigp.h>
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#
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# store_status
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#
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# Prerequisites to run this function:
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# - Prefix register is set to zero
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# - Original prefix register is stored in "dump_prefix_page"
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# - Lowcore protection is off
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#
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ENTRY(store_status)
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/* Save register one and load save area base */
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stg %r1,__LC_SAVE_AREA_RESTART
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lghi %r1,SAVE_AREA_BASE
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/* General purpose registers */
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stmg %r0,%r15,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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lg %r2,__LC_SAVE_AREA_RESTART
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stg %r2,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE+8(%r1)
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/* Control registers */
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stctg %c0,%c15,__LC_CREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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/* Access registers */
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stam %a0,%a15,__LC_AREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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/* Floating point registers */
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std %f0, 0x00 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f1, 0x08 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f2, 0x10 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f3, 0x18 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f4, 0x20 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f5, 0x28 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f6, 0x30 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f7, 0x38 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f8, 0x40 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f9, 0x48 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f10,0x50 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f11,0x58 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f12,0x60 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f13,0x68 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f14,0x70 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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std %f15,0x78 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
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/* Floating point control register */
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stfpc __LC_FP_CREG_SAVE_AREA-SAVE_AREA_BASE(%r1)
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/* CPU timer */
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stpt __LC_CPU_TIMER_SAVE_AREA-SAVE_AREA_BASE(%r1)
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/* Saved prefix register */
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larl %r2,dump_prefix_page
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mvc __LC_PREFIX_SAVE_AREA-SAVE_AREA_BASE(4,%r1),0(%r2)
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/* Clock comparator - seven bytes */
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larl %r2,.Lclkcmp
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stckc 0(%r2)
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mvc __LC_CLOCK_COMP_SAVE_AREA-SAVE_AREA_BASE + 1(7,%r1),1(%r2)
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/* Program status word */
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epsw %r2,%r3
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st %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 0(%r1)
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st %r3,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 4(%r1)
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larl %r2,store_status
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stg %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 8(%r1)
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br %r14
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.section .bss
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.align 8
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.Lclkcmp: .quad 0x0000000000000000
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.previous
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#
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# do_reipl_asm
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# Parameter: r2 = schid of reipl device
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#
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ENTRY(do_reipl_asm)
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basr %r13,0
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.Lpg0: lpswe .Lnewpsw-.Lpg0(%r13)
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.Lpg1: brasl %r14,store_status
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lctlg %c6,%c6,.Lall-.Lpg0(%r13)
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lgr %r1,%r2
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mvc __LC_PGM_NEW_PSW(16),.Lpcnew-.Lpg0(%r13)
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stsch .Lschib-.Lpg0(%r13)
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oi .Lschib+5-.Lpg0(%r13),0x84
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.Lecs: xi .Lschib+27-.Lpg0(%r13),0x01
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msch .Lschib-.Lpg0(%r13)
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lghi %r0,5
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.Lssch: ssch .Liplorb-.Lpg0(%r13)
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jz .L001
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brct %r0,.Lssch
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bas %r14,.Ldisab-.Lpg0(%r13)
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.L001: mvc __LC_IO_NEW_PSW(16),.Lionew-.Lpg0(%r13)
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.Ltpi: lpswe .Lwaitpsw-.Lpg0(%r13)
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.Lcont: c %r1,__LC_SUBCHANNEL_ID
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jnz .Ltpi
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clc __LC_IO_INT_PARM(4),.Liplorb-.Lpg0(%r13)
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jnz .Ltpi
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tsch .Liplirb-.Lpg0(%r13)
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tm .Liplirb+9-.Lpg0(%r13),0xbf
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jz .L002
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bas %r14,.Ldisab-.Lpg0(%r13)
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.L002: tm .Liplirb+8-.Lpg0(%r13),0xf3
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jz .L003
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bas %r14,.Ldisab-.Lpg0(%r13)
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.L003: st %r1,__LC_SUBCHANNEL_ID
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lhi %r1,0 # mode 0 = esa
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slr %r0,%r0 # set cpuid to zero
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sigp %r1,%r0,SIGP_SET_ARCHITECTURE # switch to esa mode
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lpsw 0
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.Ldisab: sll %r14,1
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srl %r14,1 # need to kill hi bit to avoid specification exceptions.
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st %r14,.Ldispsw+12-.Lpg0(%r13)
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lpswe .Ldispsw-.Lpg0(%r13)
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.align 8
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.Lall: .quad 0x00000000ff000000
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.align 16
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/*
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* These addresses have to be 31 bit otherwise
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* the sigp will throw a specifcation exception
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* when switching to ESA mode as bit 31 be set
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* in the ESA psw.
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* Bit 31 of the addresses has to be 0 for the
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* 31bit lpswe instruction a fact they appear to have
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* omitted from the pop.
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*/
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.Lnewpsw: .quad 0x0000000080000000
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.quad .Lpg1
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.Lpcnew: .quad 0x0000000080000000
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.quad .Lecs
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.Lionew: .quad 0x0000000080000000
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.quad .Lcont
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.Lwaitpsw: .quad 0x0202000080000000
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.quad .Ltpi
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.Ldispsw: .quad 0x0002000080000000
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.quad 0x0000000000000000
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.Liplccws: .long 0x02000000,0x60000018
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.long 0x08000008,0x20000001
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.Liplorb: .long 0x0049504c,0x0040ff80
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.long 0x00000000+.Liplccws
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.Lschib: .long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.Liplirb: .long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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.long 0x00000000,0x00000000
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