arch/powerpc/platforms/iseries/exception.h

   1 #ifndef _ASM_POWERPC_ISERIES_EXCEPTION_H
   2 #define _ASM_POWERPC_ISERIES_EXCEPTION_H
   3 /*
   4  * Extracted from head_64.S
   5  *
   6  *  PowerPC version
   7  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
   8  *
   9  *  Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
  10  *    Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
  11  *  Adapted for Power Macintosh by Paul Mackerras.
  12  *  Low-level exception handlers and MMU support
  13  *  rewritten by Paul Mackerras.
  14  *    Copyright (C) 1996 Paul Mackerras.
  15  *
  16  *  Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
  17  *    Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com
  18  *
  19  *  This file contains the low-level support and setup for the
  20  *  PowerPC-64 platform, including trap and interrupt dispatch.
  21  *
  22  *  This program is free software; you can redistribute it and/or
  23  *  modify it under the terms of the GNU General Public License
  24  *  as published by the Free Software Foundation; either version
  25  *  2 of the License, or (at your option) any later version.
  26  */
  27 #include <asm/exception.h>
  28
  29 #define EXCEPTION_PROLOG_ISERIES_1                                      \
  30         mfmsr   r10;                                                    \
  31         ld      r12,PACALPPACAPTR(r13);                                 \
  32         ld      r11,LPPACASRR0(r12);                                    \
  33         ld      r12,LPPACASRR1(r12);                                    \
  34         ori     r10,r10,MSR_RI;                                         \
  35         mtmsrd  r10,1
  36
  37 #define STD_EXCEPTION_ISERIES(label, area)                              \
  38         .globl label##_iSeries;                                         \
  39 label##_iSeries:                                                        \
  40         HMT_MEDIUM;                                                     \
  41         mtspr   SPRN_SPRG1,r13;         /* save r13 */                  \
  42         EXCEPTION_PROLOG_1(area);                                       \
  43         EXCEPTION_PROLOG_ISERIES_1;                                     \
  44         b       label##_common
  45
  46 #define MASKABLE_EXCEPTION_ISERIES(label)                               \
  47         .globl label##_iSeries;                                         \
  48 label##_iSeries:                                                        \
  49         HMT_MEDIUM;                                                     \
  50         mtspr   SPRN_SPRG1,r13;         /* save r13 */                  \
  51         EXCEPTION_PROLOG_1(PACA_EXGEN);                                 \
  52         lbz     r10,PACASOFTIRQEN(r13);                                 \
  53         cmpwi   0,r10,0;                                                \
  54         beq-    label##_iSeries_masked;                                 \
  55         EXCEPTION_PROLOG_ISERIES_1;                                     \
  56         b       label##_common;                                         \
  57
  58 #endif  /* _ASM_POWERPC_ISERIES_EXCEPTION_H */