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   1 /*
   2  *  arch/s390/kernel/reipl.S
   3  *
   4  *  S390 version
   5  *    Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
   6  *    Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com)
   7                  Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
   8  */
   9
  10 #include <asm/lowcore.h>
  11                 .globl  do_reipl_asm
  12 do_reipl_asm:   basr    %r13,0
  13 .Lpg0:          lpswe   .Lnewpsw-.Lpg0(%r13)
  14 .Lpg1:          # do store status of all registers
  15
  16                 stg     %r1,.Lregsave-.Lpg0(%r13)
  17                 lghi    %r1,0x1000
  18                 stmg    %r0,%r15,__LC_GPREGS_SAVE_AREA-0x1000(%r1)
  19                 lg      %r0,.Lregsave-.Lpg0(%r13)
  20                 stg     %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1)
  21                 stctg   %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1)
  22                 stam    %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1)
  23                 mvc     __LC_PREFIX_SAVE_AREA-0x1000(4,%r1),dump_prefix_page-.Lpg0(%r13)
  24                 stfpc   __LC_FP_CREG_SAVE_AREA-0x1000(%r1)
  25                 stckc   .Lclkcmp-.Lpg0(%r13)
  26                 mvc     __LC_CLOCK_COMP_SAVE_AREA-0x1000(8,%r1),.Lclkcmp-.Lpg0(%r13)
  27                 stpt    __LC_CPU_TIMER_SAVE_AREA-0x1000(%r1)
  28                 stg     %r13, __LC_PSW_SAVE_AREA-0x1000+8(%r1)
  29
  30                 lctlg   %c6,%c6,.Lall-.Lpg0(%r13)
  31                 lgr     %r1,%r2
  32                 mvc     __LC_PGM_NEW_PSW(16),.Lpcnew-.Lpg0(%r13)
  33                 stsch   .Lschib-.Lpg0(%r13)
  34                 oi      .Lschib+5-.Lpg0(%r13),0x84
  35 .Lecs:          xi      .Lschib+27-.Lpg0(%r13),0x01
  36                 msch    .Lschib-.Lpg0(%r13)
  37                 lghi    %r0,5
  38 .Lssch:         ssch    .Liplorb-.Lpg0(%r13)
  39                 jz      .L001
  40                 brct    %r0,.Lssch
  41                 bas     %r14,.Ldisab-.Lpg0(%r13)
  42 .L001:          mvc     __LC_IO_NEW_PSW(16),.Lionew-.Lpg0(%r13)
  43 .Ltpi:          lpswe   .Lwaitpsw-.Lpg0(%r13)
  44 .Lcont:         c       %r1,__LC_SUBCHANNEL_ID
  45                 jnz     .Ltpi
  46                 clc     __LC_IO_INT_PARM(4),.Liplorb-.Lpg0(%r13)
  47                 jnz     .Ltpi
  48                 tsch    .Liplirb-.Lpg0(%r13)
  49                 tm      .Liplirb+9-.Lpg0(%r13),0xbf
  50                 jz      .L002
  51                 bas     %r14,.Ldisab-.Lpg0(%r13)
  52 .L002:          tm      .Liplirb+8-.Lpg0(%r13),0xf3
  53                 jz      .L003
  54                 bas     %r14,.Ldisab-.Lpg0(%r13)
  55 .L003:          st      %r1,__LC_SUBCHANNEL_ID
  56                 lhi     %r1,0            # mode 0 = esa
  57                 slr     %r0,%r0          # set cpuid to zero
  58                 sigp    %r1,%r0,0x12     # switch to esa mode
  59                 lpsw    0
  60 .Ldisab:        sll     %r14,1
  61                 srl     %r14,1           # need to kill hi bit to avoid specification exceptions.
  62                 st      %r14,.Ldispsw+12-.Lpg0(%r13)
  63                 lpswe   .Ldispsw-.Lpg0(%r13)
  64                 .align  8
  65 .Lclkcmp:       .quad   0x0000000000000000
  66 .Lall:          .quad   0x00000000ff000000
  67 .Lregsave:      .quad   0x0000000000000000
  68                 .align  16
  69 /*
  70  * These addresses have to be 31 bit otherwise
  71  * the sigp will throw a specifcation exception
  72  * when switching to ESA mode as bit 31 be set
  73  * in the ESA psw.
  74  * Bit 31 of the addresses has to be 0 for the
  75  * 31bit lpswe instruction a fact they appear to have
  76  * ommited from the pop.
  77  */
  78 .Lnewpsw:       .quad   0x0000000080000000
  79                 .quad   .Lpg1
  80 .Lpcnew:        .quad   0x0000000080000000
  81                 .quad   .Lecs
  82 .Lionew:        .quad   0x0000000080000000
  83                 .quad   .Lcont
  84 .Lwaitpsw:      .quad   0x0202000080000000
  85                 .quad   .Ltpi
  86 .Ldispsw:       .quad   0x0002000080000000
  87                 .quad   0x0000000000000000
  88 .Liplccws:      .long   0x02000000,0x60000018
  89                 .long   0x08000008,0x20000001
  90 .Liplorb:       .long   0x0049504c,0x0040ff80
  91                 .long   0x00000000+.Liplccws
  92 .Lschib:        .long   0x00000000,0x00000000
  93                 .long   0x00000000,0x00000000
  94                 .long   0x00000000,0x00000000
  95                 .long   0x00000000,0x00000000
  96                 .long   0x00000000,0x00000000
  97                 .long   0x00000000,0x00000000
  98 .Liplirb:       .long   0x00000000,0x00000000
  99                 .long   0x00000000,0x00000000
 100                 .long   0x00000000,0x00000000
 101                 .long   0x00000000,0x00000000
 102                 .long   0x00000000,0x00000000
 103                 .long   0x00000000,0x00000000
 104                 .long   0x00000000,0x00000000
 105                 .long   0x00000000,0x00000000
 106         .globl dump_prefix_page
 107 dump_prefix_page:
 108         .long 0x00000000