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diff --git a/src/mem/ruby/simics/interface.hh b/src/mem/ruby/simics/interface.hh
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+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * $Id: interface.h 1.33 05/01/19 13:12:32-06:00 mikem@maya.cs.wisc.edu $
+ *
+ * Description:
+ *
+ */
+
+#ifndef INTERFACE_H
+#define INTERFACE_H
+
+#include "Global.hh"
+#include "mf_api.hh"
+#include "Address.hh"
+
+// // Simics includes
+// extern "C" {
+// #include "simics/api.hh"
+// }
+
+typedef void memory_transaction_t;
+
+// simics memory access
+integer_t SIMICS_read_physical_memory(int procID, physical_address_t address,
+                                      int len );
+void SIMICS_read_physical_memory_buffer(int procID, physical_address_t addr,
+                                         char* buffer, int len );
+void SIMICS_write_physical_memory( int procID, physical_address_t address,
+                                   integer_t value, int len );
+void SIMICS_write_physical_memory_buffer(int procID, physical_address_t addr,
+                                         char* buffer, int len );
+bool SIMICS_check_memory_value(int procID, physical_address_t addr,
+                               char* buffer, int len);
+const char *SIMICS_disassemble_physical( int procID, physical_address_t pa );
+
+// simics VM translation, decoding, etc.
+physical_address_t SIMICS_translate_address( int procID, Address address );
+physical_address_t SIMICS_translate_data_address( int procID, Address address );
+#ifdef SPARC
+bool SIMICS_is_ldda(const memory_transaction_t *mem_trans);
+#endif
+
+// simics timing
+void SIMICS_unstall_proc(int cpuNumber);
+void SIMICS_unstall_proc(int cpuNumber, int cycles);
+void SIMICS_stall_proc(int cpuNumber, int cycles);
+void SIMICS_post_stall_proc(int cpuNumber, int cycles);
+void SIMICS_wakeup_ruby();
+
+// simics callbacks
+void SIMICS_remove_ruby_callback( void );
+void SIMICS_install_timing_model( void );
+void SIMICS_remove_timing_model( void );
+void SIMICS_install_exception_callback( void );
+void SIMICS_remove_exception_callback( void );
+#ifdef SPARC
+void SIMICS_install_asi_callback( void );
+void SIMICS_remove_asi_callback( void );
+#endif
+
+// simics PC, IC
+integer_t SIMICS_get_insn_count( int cpuNumber );
+integer_t SIMICS_get_cycle_count(int cpuNumber);
+Address SIMICS_get_program_counter( void *cpu );
+Address SIMICS_get_program_counter( int procID );
+Address SIMICS_get_npc(int procID);
+void SIMICS_set_program_counter( int procID, Address newPC );
+void SIMICS_set_next_program_counter( int procID, Address newPC );
+void SIMICS_set_pc( int procID, Address newPC );
+void SIMICS_set_npc( int procID, Address newNPC );
+
+void SIMICS_post_continue_execution(int procID);
+void SIMICS_post_restart_transaction(int procID);
+
+// simics processor number
+int SIMICS_number_processors( void );
+void * SIMICS_current_processor( void );
+int SIMICS_current_processor_number( void );
+int SIMICS_get_proc_no( void *cpu );
+void* SIMICS_get_proc_ptr( int cpuNumber );
+
+// simics version
+void SIMICS_print_version(ostream& out);
+
+// opal
+mf_opal_api_t *SIMICS_get_opal_interface( void );
+
+// STC related, should not be used anymore!
+void SIMICS_flush_STC(int cpuNumber);
+void SIMICS_invalidate_from_STC(const Address& address, int cpuNumber);
+void SIMICS_downgrade_from_STC(const Address& address, int cpuNumber);
+
+// KM -- from Nikhil's SN code
+uinteger_t SIMICS_read_control_register(int cpuNumber, int registerNumber);
+uinteger_t SIMICS_read_window_register(int cpuNumber, int window, int registerNumber);
+uinteger_t SIMICS_read_global_register(int cpuNumber, int globals, int registerNumber);
+//uint64 SIMICS_read_fp_register_x(int cpuNumber, int registerNumber);
+
+// KM -- new version based on reg names
+int SIMICS_get_register_number(int cpuNumber, const char * reg_name);
+const char * SIMICS_get_register_name(int cpuNumber, int reg_num);
+uinteger_t SIMICS_read_register(int cpuNumber, int registerNumber);
+void SIMICS_write_register(int cpuNumber, int registerNumber, uinteger_t value);
+
+void SIMICS_write_control_register(int cpuNumber, int registerNumber, uinteger_t value);
+void SIMICS_write_window_register(int cpuNumber, int window, int registerNumber, uinteger_t value);
+void SIMICS_write_global_register(int cpuNumber, int globals, int registerNumber, uinteger_t value);
+void SIMICS_write_fp_register_x(int cpuNumber, int registerNumber, uint64 value);
+void SIMICS_enable_processor(int cpuNumber);
+void SIMICS_disable_processor(int cpuNumber);
+void SIMICS_post_disable_processor(int cpuNumber);
+bool SIMICS_processor_enabled(int cpuNumber);
+
+void ruby_abort_transaction(void *cpu, void *parameter);
+void ruby_set_program_counter(void *cpu, void *parameter);
+void ruby_set_pc(void *cpu, void *parameter);
+void ruby_set_npc(void *cpu, void *parameter);
+void ruby_continue_execution(void *cpu, void *parameter);
+void ruby_restart_transaction(void *cpu, void *parameter);
+void ruby_stall_proc(void *cpu, void *parameter);
+void ruby_disable_processor(void *cpu, void *parameter);
+
+#endif //INTERFACE_H
+