1 files changed, 89 insertions, 0 deletions
diff --git a/target/alpha/mem_helper.c b/target/alpha/mem_helper.c
new file mode 100644
index 0000000000..78a7d45590
--- /dev/null
+++ b/target/alpha/mem_helper.c
@@ -0,0 +1,89 @@
+/*
+ *  Helpers for loads and stores
+ *
+ *  Copyright (c) 2007 Jocelyn Mayer
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "exec/exec-all.h"
+#include "exec/cpu_ldst.h"
+
+/* Softmmu support */
+#ifndef CONFIG_USER_ONLY
+void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
+                                   MMUAccessType access_type,
+                                   int mmu_idx, uintptr_t retaddr)
+{
+    AlphaCPU *cpu = ALPHA_CPU(cs);
+    CPUAlphaState *env = &cpu->env;
+    uint64_t pc;
+    uint32_t insn;
+
+    if (retaddr) {
+        cpu_restore_state(cs, retaddr);
+    }
+
+    pc = env->pc;
+    insn = cpu_ldl_code(env, pc);
+
+    env->trap_arg0 = addr;
+    env->trap_arg1 = insn >> 26;                /* opcode */
+    env->trap_arg2 = (insn >> 21) & 31;         /* dest regno */
+    cs->exception_index = EXCP_UNALIGN;
+    env->error_code = 0;
+    cpu_loop_exit(cs);
+}
+
+void alpha_cpu_unassigned_access(CPUState *cs, hwaddr addr,
+                                 bool is_write, bool is_exec, int unused,
+                                 unsigned size)
+{
+    AlphaCPU *cpu = ALPHA_CPU(cs);
+    CPUAlphaState *env = &cpu->env;
+
+    env->trap_arg0 = addr;
+    env->trap_arg1 = is_write ? 1 : 0;
+    cs->exception_index = EXCP_MCHK;
+    env->error_code = 0;
+
+    /* ??? We should cpu_restore_state to the faulting insn, but this hook
+       does not have access to the retaddr value from the original helper.
+       It's all moot until the QEMU PALcode grows an MCHK handler.  */
+
+    cpu_loop_exit(cs);
+}
+
+/* try to fill the TLB and return an exception if error. If retaddr is
+   NULL, it means that the function was called in C code (i.e. not
+   from generated code or from helper.c) */
+/* XXX: fix it to restore all registers */
+void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
+              int mmu_idx, uintptr_t retaddr)
+{
+    int ret;
+
+    ret = alpha_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
+    if (unlikely(ret != 0)) {
+        if (retaddr) {
+            cpu_restore_state(cs, retaddr);
+        }
+        /* Exception index and error code are already set */
+        cpu_loop_exit(cs);
+    }
+}
+#endif /* CONFIG_USER_ONLY */