target-alpha/mem_helper.c

   1 /*
   2  *  Helpers for loads and stores
   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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cpu.h"
  21 #include "helper.h"
  22
  23
  24 /* Softmmu support */
  25 #ifndef CONFIG_USER_ONLY
  26
  27 uint64_t helper_ldl_phys(CPUAlphaState *env, uint64_t p)
  28 {
  29     CPUState *cs = ENV_GET_CPU(env);
  30     return (int32_t)ldl_phys(cs->as, p);
  31 }
  32
  33 uint64_t helper_ldq_phys(CPUAlphaState *env, uint64_t p)
  34 {
  35     CPUState *cs = ENV_GET_CPU(env);
  36     return ldq_phys(cs->as, p);
  37 }
  38
  39 uint64_t helper_ldl_l_phys(CPUAlphaState *env, uint64_t p)
  40 {
  41     CPUState *cs = ENV_GET_CPU(env);
  42     env->lock_addr = p;
  43     return env->lock_value = (int32_t)ldl_phys(cs->as, p);
  44 }
  45
  46 uint64_t helper_ldq_l_phys(CPUAlphaState *env, uint64_t p)
  47 {
  48     CPUState *cs = ENV_GET_CPU(env);
  49     env->lock_addr = p;
  50     return env->lock_value = ldq_phys(cs->as, p);
  51 }
  52
  53 void helper_stl_phys(uint64_t p, uint64_t v)
  54 {
  55     stl_phys(p, v);
  56 }
  57
  58 void helper_stq_phys(CPUAlphaState *env, uint64_t p, uint64_t v)
  59 {
  60     CPUState *cs = ENV_GET_CPU(env);
  61     stq_phys(cs->as, p, v);
  62 }
  63
  64 uint64_t helper_stl_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v)
  65 {
  66     CPUState *cs = ENV_GET_CPU(env);
  67     uint64_t ret = 0;
  68
  69     if (p == env->lock_addr) {
  70         int32_t old = ldl_phys(cs->as, p);
  71         if (old == (int32_t)env->lock_value) {
  72             stl_phys(p, v);
  73             ret = 1;
  74         }
  75     }
  76     env->lock_addr = -1;
  77
  78     return ret;
  79 }
  80
  81 uint64_t helper_stq_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v)
  82 {
  83     CPUState *cs = ENV_GET_CPU(env);
  84     uint64_t ret = 0;
  85
  86     if (p == env->lock_addr) {
  87         uint64_t old = ldq_phys(cs->as, p);
  88         if (old == env->lock_value) {
  89             stq_phys(cs->as, p, v);
  90             ret = 1;
  91         }
  92     }
  93     env->lock_addr = -1;
  94
  95     return ret;
  96 }
  97
  98 static void do_unaligned_access(CPUAlphaState *env, target_ulong addr,
  99                                 int is_write, int is_user, uintptr_t retaddr)
 100 {
 101     uint64_t pc;
 102     uint32_t insn;
 103
 104     if (retaddr) {
 105         cpu_restore_state(env, retaddr);
 106     }
 107
 108     pc = env->pc;
 109     insn = cpu_ldl_code(env, pc);
 110
 111     env->trap_arg0 = addr;
 112     env->trap_arg1 = insn >> 26;                /* opcode */
 113     env->trap_arg2 = (insn >> 21) & 31;         /* dest regno */
 114     env->exception_index = EXCP_UNALIGN;
 115     env->error_code = 0;
 116     cpu_loop_exit(env);
 117 }
 118
 119 void alpha_cpu_unassigned_access(CPUState *cs, hwaddr addr,
 120                                  bool is_write, bool is_exec, int unused,
 121                                  unsigned size)
 122 {
 123     AlphaCPU *cpu = ALPHA_CPU(cs);
 124     CPUAlphaState *env = &cpu->env;
 125
 126     env->trap_arg0 = addr;
 127     env->trap_arg1 = is_write ? 1 : 0;
 128     dynamic_excp(env, 0, EXCP_MCHK, 0);
 129 }
 130
 131 #include "exec/softmmu_exec.h"
 132
 133 #define MMUSUFFIX _mmu
 134 #define ALIGNED_ONLY
 135
 136 #define SHIFT 0
 137 #include "exec/softmmu_template.h"
 138
 139 #define SHIFT 1
 140 #include "exec/softmmu_template.h"
 141
 142 #define SHIFT 2
 143 #include "exec/softmmu_template.h"
 144
 145 #define SHIFT 3
 146 #include "exec/softmmu_template.h"
 147
 148 /* try to fill the TLB and return an exception if error. If retaddr is
 149    NULL, it means that the function was called in C code (i.e. not
 150    from generated code or from helper.c) */
 151 /* XXX: fix it to restore all registers */
 152 void tlb_fill(CPUAlphaState *env, target_ulong addr, int is_write,
 153               int mmu_idx, uintptr_t retaddr)
 154 {
 155     int ret;
 156
 157     ret = cpu_alpha_handle_mmu_fault(env, addr, is_write, mmu_idx);
 158     if (unlikely(ret != 0)) {
 159         if (retaddr) {
 160             cpu_restore_state(env, retaddr);
 161         }
 162         /* Exception index and error code are already set */
 163         cpu_loop_exit(env);
 164     }
 165 }
 166 #endif /* CONFIG_USER_ONLY */