// license:BSD-3-Clause // copyright-holders:David Haywood /*********************************\ ARCtangent (A4) core ARC == Argonaut RISC Core (this is a skeleton core) \*********************************/ #include "emu.h" #include "debugger.h" #include "arc.h" const device_type ARC = &device_creator; arc_device::arc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : cpu_device(mconfig, ARC, "ARCtangent A4", tag, owner, clock, "arc", __FILE__) , m_program_config("program", ENDIANNESS_BIG, 32, 24, 0), m_pc(0), m_program(nullptr), m_icount(0), m_debugger_temp(0) // some docs describe these as 'middle endian'?! { } offs_t arc_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) { extern CPU_DISASSEMBLE( arc ); return CPU_DISASSEMBLE_NAME(arc)(this, buffer, pc, oprom, opram, options); } /*****************************************************************************/ /*****************************************************************************/ void arc_device::unimplemented_opcode(UINT16 op) { fatalerror("arc: unknown opcode %04x at %04x\n", op, m_pc << 2); } /*****************************************************************************/ UINT32 arc_device::READ32(UINT32 address) { return m_program->read_dword(address << 2); } void arc_device::WRITE32(UINT32 address, UINT32 data) { m_program->write_dword(address << 2, data); } /*****************************************************************************/ void arc_device::device_start() { m_pc = 0; m_debugger_temp = 0; m_program = &space(AS_PROGRAM); state_add( 0, "PC", m_debugger_temp).callimport().callexport().formatstr("%08X"); state_add(STATE_GENPC, "GENPC", m_debugger_temp).callexport().noshow(); state_add(STATE_GENPCBASE, "CURPC", m_debugger_temp).callexport().noshow(); m_icountptr = &m_icount; } void arc_device::state_export(const device_state_entry &entry) { switch (entry.index()) { case 0: m_debugger_temp = m_pc << 2; break; case STATE_GENPC: case STATE_GENPCBASE: m_debugger_temp = m_pc << 2; break; } } void arc_device::state_import(const device_state_entry &entry) { switch (entry.index()) { case 0: m_pc = (m_debugger_temp & 0xfffffffc) >> 2; break; } } void arc_device::device_reset() { m_pc = 0x00000000; } /*****************************************************************************/ void arc_device::execute_set_input(int irqline, int state) { } void arc_device::execute_run() { //UINT32 lres; //lres = 0; while (m_icount > 0) { debugger_instruction_hook(this, m_pc<<2); //UINT32 op = READ32(m_pc); m_pc++; m_icount--; } }