arch/s390/kernel/reset.S

   1 /*
   2  *  arch/s390/kernel/reset.S
   3  *
   4  *    Copyright (C) IBM Corp. 2006
   5  *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
   6  *               Michael Holzheu <holzheu@de.ibm.com>
   7  */
   8
   9 #include <asm/ptrace.h>
  10 #include <asm/lowcore.h>
  11
  12 #ifdef CONFIG_64BIT
  13
  14         .globl  reset_mcck_handler
  15 reset_mcck_handler:
  16         basr    %r13,0
  17 0:      lg      %r15,__LC_PANIC_STACK   # load panic stack
  18         aghi    %r15,-STACK_FRAME_OVERHEAD
  19         lg      %r1,s390_reset_mcck_handler-0b(%r13)
  20         ltgr    %r1,%r1
  21         jz      1f
  22         basr    %r14,%r1
  23 1:      la      %r1,4095
  24         lmg     %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
  25         lpswe   __LC_MCK_OLD_PSW
  26
  27         .globl  s390_reset_mcck_handler
  28 s390_reset_mcck_handler:
  29         .quad   0
  30
  31         .globl  reset_pgm_handler
  32 reset_pgm_handler:
  33         stmg    %r0,%r15,__LC_SAVE_AREA
  34         basr    %r13,0
  35 0:      lg      %r15,__LC_PANIC_STACK   # load panic stack
  36         aghi    %r15,-STACK_FRAME_OVERHEAD
  37         lg      %r1,s390_reset_pgm_handler-0b(%r13)
  38         ltgr    %r1,%r1
  39         jz      1f
  40         basr    %r14,%r1
  41         lmg     %r0,%r15,__LC_SAVE_AREA
  42         lpswe   __LC_PGM_OLD_PSW
  43 1:      lpswe   disabled_wait_psw-0b(%r13)
  44         .globl s390_reset_pgm_handler
  45 s390_reset_pgm_handler:
  46         .quad   0
  47         .align  8
  48 disabled_wait_psw:
  49         .quad   0x0002000180000000,0x0000000000000000 + reset_pgm_handler
  50
  51 #else /* CONFIG_64BIT */
  52
  53         .globl  reset_mcck_handler
  54 reset_mcck_handler:
  55         basr    %r13,0
  56 0:      l       %r15,__LC_PANIC_STACK   # load panic stack
  57         ahi     %r15,-STACK_FRAME_OVERHEAD
  58         l       %r1,s390_reset_mcck_handler-0b(%r13)
  59         ltr     %r1,%r1
  60         jz      1f
  61         basr    %r14,%r1
  62 1:      lm      %r0,%r15,__LC_GPREGS_SAVE_AREA
  63         lpsw    __LC_MCK_OLD_PSW
  64
  65         .globl  s390_reset_mcck_handler
  66 s390_reset_mcck_handler:
  67         .long   0
  68
  69         .globl  reset_pgm_handler
  70 reset_pgm_handler:
  71         stm     %r0,%r15,__LC_SAVE_AREA
  72         basr    %r13,0
  73 0:      l       %r15,__LC_PANIC_STACK   # load panic stack
  74         ahi     %r15,-STACK_FRAME_OVERHEAD
  75         l       %r1,s390_reset_pgm_handler-0b(%r13)
  76         ltr     %r1,%r1
  77         jz      1f
  78         basr    %r14,%r1
  79         lm      %r0,%r15,__LC_SAVE_AREA
  80         lpsw    __LC_PGM_OLD_PSW
  81
  82 1:      lpsw    disabled_wait_psw-0b(%r13)
  83         .globl  s390_reset_pgm_handler
  84 s390_reset_pgm_handler:
  85         .long   0
  86 disabled_wait_psw:
  87         .align 8
  88         .long   0x000a0000,0x00000000 + reset_pgm_handler
  89
  90 #endif /* CONFIG_64BIT */