target-alpha/op.c

   1 /*
   2  *  Alpha emulation cpu micro-operations for qemu.
   3  *
   4  *  Copyright (c) 2007 Jocelyn Mayer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #define DEBUG_OP
  22
  23 #include "config.h"
  24 #include "exec.h"
  25 #include "host-utils.h"
  26 #include "op_helper.h"
  27
  28 /* Debug stuff */
  29 void OPPROTO op_no_op (void)
  30 {
  31 #if !defined (DEBUG_OP)
  32     __asm__ __volatile__("nop" : : : "memory");
  33 #endif
  34     RETURN();
  35 }
  36
  37 /* Load and stores */
  38 #define MEMSUFFIX _raw
  39 #include "op_mem.h"
  40 #if !defined(CONFIG_USER_ONLY)
  41 #define MEMSUFFIX _kernel
  42 #include "op_mem.h"
  43 #define MEMSUFFIX _executive
  44 #include "op_mem.h"
  45 #define MEMSUFFIX _supervisor
  46 #include "op_mem.h"
  47 #define MEMSUFFIX _user
  48 #include "op_mem.h"
  49 /* This is used for pal modes */
  50 #define MEMSUFFIX _data
  51 #include "op_mem.h"
  52 #endif
  53
  54 /* PALcode support special instructions */
  55 #if !defined (CONFIG_USER_ONLY)
  56 void OPPROTO op_hw_rei (void)
  57 {
  58     env->pc = env->ipr[IPR_EXC_ADDR] & ~3;
  59     env->ipr[IPR_EXC_ADDR] = env->ipr[IPR_EXC_ADDR] & 1;
  60     /* XXX: re-enable interrupts and memory mapping */
  61     RETURN();
  62 }
  63
  64 void OPPROTO op_hw_ret (void)
  65 {
  66     env->pc = T0 & ~3;
  67     env->ipr[IPR_EXC_ADDR] = T0 & 1;
  68     /* XXX: re-enable interrupts and memory mapping */
  69     RETURN();
  70 }
  71
  72 void OPPROTO op_mfpr (void)
  73 {
  74     helper_mfpr(PARAM(1));
  75     RETURN();
  76 }
  77
  78 void OPPROTO op_mtpr (void)
  79 {
  80     helper_mtpr(PARAM(1));
  81     RETURN();
  82 }
  83
  84 void OPPROTO op_set_alt_mode (void)
  85 {
  86     env->saved_mode = env->ps & 0xC;
  87     env->ps = (env->ps & ~0xC) | (env->ipr[IPR_ALT_MODE] & 0xC);
  88     RETURN();
  89 }
  90
  91 void OPPROTO op_restore_mode (void)
  92 {
  93     env->ps = (env->ps & ~0xC) | env->saved_mode;
  94     RETURN();
  95 }
  96
  97 void OPPROTO op_ld_phys_to_virt (void)
  98 {
  99     helper_ld_phys_to_virt();
 100     RETURN();
 101 }
 102
 103 void OPPROTO op_st_phys_to_virt (void)
 104 {
 105     helper_st_phys_to_virt();
 106     RETURN();
 107 }
 108 #endif /* !defined (CONFIG_USER_ONLY) */