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