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Merge pull request #3542 from pmackinlay/tms320c30
tms32031: add tms320c30 and basic hold/holda support
This commit is contained in:
ajrhacker
GitHub
commit
e30a760f1c
@ -88,24 +88,47 @@ const int GIEFLAG = 0x2000;
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//**************************************************************************
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// device type definition
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DEFINE_DEVICE_TYPE(TMS32030, tms32030_device, "tms32030", "Texas Instruments TMS32030")
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DEFINE_DEVICE_TYPE(TMS32031, tms32031_device, "tms32031", "Texas Instruments TMS32031")
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DEFINE_DEVICE_TYPE(TMS32032, tms32032_device, "tms32032", "Texas Instruments TMS32032")
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// memory map common to all 'C30 devices
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// TODO: expand to cover all the standard internal peripherals
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void tms3203x_device::common_3203x(address_map &map)
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{
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map(0x808064, 0x808064).rw(this, FUNC(tms3203x_device::primary_bus_control_r), FUNC(tms3203x_device::primary_bus_control_w));
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}
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// internal memory maps
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void tms32030_device::internal_32030(address_map &map)
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{
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common_3203x(map);
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map(0x809800, 0x809fff).ram();
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}
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void tms32031_device::internal_32031(address_map &map)
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{
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common_3203x(map);
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map(0x809800, 0x809fff).ram();
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}
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void tms32032_device::internal_32032(address_map &map)
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{
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common_3203x(map);
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map(0x87fe00, 0x87ffff).ram();
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}
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// ROM definitions for the internal boot loader programs
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// (Using assembled versions until the code ROMs are extracted from both DSPs)
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ROM_START( tms32030 )
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ROM_REGION(0x4000, "tms32030", 0)
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ROM_LOAD( "c30boot.bin", 0x0000, 0x4000, BAD_DUMP CRC(bddc2763) SHA1(96b2170ecee5bec5abaa1741bb2d3b6096ecc262))
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ROM_END
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ROM_START( tms32031 )
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ROM_REGION(0x4000, "tms32031", 0)
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ROM_LOAD( "c31boot.bin", 0x0000, 0x4000, BAD_DUMP CRC(bddc2763) SHA1(96b2170ecee5bec5abaa1741bb2d3b6096ecc262) ) // Assembled from c31boot.asm (02-07-92)
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@ -260,6 +283,7 @@ tms3203x_device::tms3203x_device(const machine_config &mconfig, device_type type
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m_chip_type(chiptype),
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m_pc(0),
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m_bkmask(0),
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m_primary_bus_control(0),
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m_irq_state(0),
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m_delayed(false),
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m_irq_pending(false),
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@ -270,7 +294,8 @@ tms3203x_device::tms3203x_device(const machine_config &mconfig, device_type type
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m_mcbl_mode(false),
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m_xf0_cb(*this),
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m_xf1_cb(*this),
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m_iack_cb(*this)
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m_iack_cb(*this),
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m_holda_cb(*this)
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{
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// initialize remaining state
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memset(&m_r, 0, sizeof(m_r));
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@ -283,6 +308,11 @@ tms3203x_device::tms3203x_device(const machine_config &mconfig, device_type type
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#endif
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}
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tms32030_device::tms32030_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: tms3203x_device(mconfig, TMS32030, tag, owner, clock, CHIP_TYPE_TMS32030, address_map_constructor(FUNC(tms32030_device::internal_32030), this))
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{
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}
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tms32031_device::tms32031_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: tms3203x_device(mconfig, TMS32031, tag, owner, clock, CHIP_TYPE_TMS32031, address_map_constructor(FUNC(tms32031_device::internal_32031), this))
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{
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@ -317,6 +347,7 @@ const tiny_rom_entry *tms3203x_device::device_rom_region() const
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switch (m_chip_type)
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{
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default:
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case CHIP_TYPE_TMS32030: return ROM_NAME( tms32030 );
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case CHIP_TYPE_TMS32031: return ROM_NAME( tms32031 );
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case CHIP_TYPE_TMS32032: return ROM_NAME( tms32032 );
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}
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@ -372,6 +403,7 @@ void tms3203x_device::device_start()
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m_xf0_cb.resolve_safe();
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m_xf1_cb.resolve_safe();
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m_iack_cb.resolve_safe();
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m_holda_cb.resolve_safe();
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// set up the internal boot loader ROM
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m_bootrom = reinterpret_cast<uint32_t*>(memregion(shortname())->base());
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@ -381,11 +413,13 @@ void tms3203x_device::device_start()
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for (int regnum = 0; regnum < 36; regnum++)
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save_item(NAME(m_r[regnum].i32), regnum);
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save_item(NAME(m_bkmask));
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save_item(NAME(m_primary_bus_control));
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save_item(NAME(m_irq_state));
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save_item(NAME(m_delayed));
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save_item(NAME(m_irq_pending));
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save_item(NAME(m_is_idling));
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save_item(NAME(m_mcbl_mode));
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save_item(NAME(m_hold_state));
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// register our state for the debugger
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state_add(TMS3203X_PC, "PC", m_pc);
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@ -448,6 +482,9 @@ void tms3203x_device::device_reset()
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// update IF with the external interrupt state (required for boot loader operation)
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IREG(TMR_IF) |= m_irq_state & 0x0f;
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// reset peripheral registers
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m_primary_bus_control = 0x000010f8;
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// reset internal stuff
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m_delayed = m_irq_pending = m_is_idling = false;
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}
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@ -694,7 +731,7 @@ uint32_t tms3203x_device::execute_max_cycles() const
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uint32_t tms3203x_device::execute_input_lines() const
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{
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return (m_chip_type == CHIP_TYPE_TMS32032) ? 13 : 12;
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return 14;
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}
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@ -704,10 +741,6 @@ uint32_t tms3203x_device::execute_input_lines() const
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void tms3203x_device::execute_set_input(int inputnum, int state)
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{
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// ignore anything out of range
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if (inputnum >= 13)
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return;
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if (inputnum == TMS3203X_MCBL)
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{
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// switch between microcomputer/boot loader and microprocessor modes
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@ -716,6 +749,33 @@ void tms3203x_device::execute_set_input(int inputnum, int state)
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return;
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}
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if (inputnum == TMS3203X_HOLD)
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{
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m_hold_state = (state == ASSERT_LINE);
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// FIXME: "there is a minimum of one cycle delay from the time when
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// the processor recognises /HOLD = 0 until /HOLDA = 0"
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if (m_hold_state)
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{
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// assert hold acknowledge if external hold enabled
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if (!(m_primary_bus_control & NOHOLD))
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{
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m_primary_bus_control |= HOLDST;
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m_holda_cb(ASSERT_LINE);
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}
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}
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else
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{
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// clear hold acknowledge if port is held externally
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if ((m_primary_bus_control & HOLDST) && !(m_primary_bus_control & HIZ))
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{
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m_primary_bus_control &= ~HOLDST;
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m_holda_cb(CLEAR_LINE);
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}
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}
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return;
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}
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// update the external state
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uint16_t intmask = 1 << inputnum;
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if (state == ASSERT_LINE)
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@ -729,7 +789,7 @@ void tms3203x_device::execute_set_input(int inputnum, int state)
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// external interrupts are level-sensitive on the '31 and can be
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// configured as such on the '32; in that case, if the external
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// signal is high, we need to update the value in IF accordingly
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if (m_chip_type == CHIP_TYPE_TMS32031 || (IREG(TMR_ST) & 0x4000) == 0)
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if (m_chip_type != CHIP_TYPE_TMS32032 || (IREG(TMR_ST) & 0x4000) == 0)
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IREG(TMR_IF) |= m_irq_state & 0x0f;
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}
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@ -813,6 +873,30 @@ void tms3203x_device::execute_run()
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}
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}
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// internal peripherals
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WRITE32_MEMBER(tms3203x_device::primary_bus_control_w)
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{
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// change in internal hold state
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if ((m_primary_bus_control ^ data) & HIZ)
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{
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if (m_primary_bus_control & HOLDST)
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m_primary_bus_control &= ~HOLDST;
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else
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m_primary_bus_control |= HOLDST;
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m_holda_cb(data & HIZ ? ASSERT_LINE : CLEAR_LINE);
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}
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// enable of external hold with hold pending
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if ((m_primary_bus_control & NOHOLD) && !(data & NOHOLD) && m_hold_state)
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{
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m_primary_bus_control |= HOLDST;
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m_holda_cb(ASSERT_LINE);
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}
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// update register
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m_primary_bus_control = (m_primary_bus_control & ~(mem_mask | WMASK)) | (data & mem_mask & WMASK);
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}
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//**************************************************************************
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// CORE OPCODES
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@ -41,6 +41,7 @@ const int TMS3203X_DINT = 10; // DMA interrupt
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const int TMS3203X_DINT0 = 10; // DMA 0 interrupt (32032 only)
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const int TMS3203X_DINT1 = 11; // DMA 1 interrupt (32032 only)
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const int TMS3203X_MCBL = 12; // Microcomputer/boot loader mode
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const int TMS3203X_HOLD = 13; // Primary bus interface hold signal
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// register enumeration
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enum
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@ -102,6 +103,8 @@ enum
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#define MCFG_TMS3203X_IACK_CB(_devcb) \
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devcb = &downcast<tms3203x_device &>(*device).set_iack_callback(DEVCB_##_devcb);
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#define MCFG_TMS3203X_HOLDA_CB(_devcb) \
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devcb = &downcast<tms3203x_device &>(*device).set_holda_callback(DEVCB_##_devcb);
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//**************************************************************************
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// TYPE DEFINITIONS
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@ -143,6 +146,7 @@ public:
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template <class Object> devcb_base &set_xf0_callback(Object &&cb) { return m_xf0_cb.set_callback(std::forward<Object>(cb)); }
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template <class Object> devcb_base &set_xf1_callback(Object &&cb) { return m_xf1_cb.set_callback(std::forward<Object>(cb)); }
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template <class Object> devcb_base &set_iack_callback(Object &&cb) { return m_iack_cb.set_callback(std::forward<Object>(cb)); }
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template <class Object> devcb_base &set_holda_callback(Object &&cb) { return m_holda_cb.set_callback(std::forward<Object>(cb)); }
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// public interfaces
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static float fp_to_float(uint32_t floatdata);
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@ -153,12 +157,14 @@ public:
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protected:
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enum
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{
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CHIP_TYPE_TMS32030,
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CHIP_TYPE_TMS32031,
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CHIP_TYPE_TMS32032
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};
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// construction/destruction
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tms3203x_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, uint32_t chiptype, address_map_constructor internal_map);
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void common_3203x(address_map &map);
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// device-level overrides
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virtual void device_start() override;
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@ -184,6 +190,10 @@ protected:
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// device_disasm_interface overrides
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virtual std::unique_ptr<util::disasm_interface> create_disassembler() override;
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// internal peripheral device handlers
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DECLARE_READ32_MEMBER(primary_bus_control_r) { return m_primary_bus_control; }
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DECLARE_WRITE32_MEMBER(primary_bus_control_w);
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// memory helpers
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uint32_t ROPCODE(offs_t pc);
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uint32_t RMEM(offs_t addr);
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@ -755,6 +765,20 @@ protected:
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tmsreg m_r[36];
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uint32_t m_bkmask;
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// internal peripheral registers
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enum primary_bus_control_mask : uint32_t
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{
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HOLDST = 0x00000001, // hold status
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NOHOLD = 0x00000002, // external hold disable
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HIZ = 0x00000004, // internal hold
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SWW = 0x00000018, // software wait mode
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WTCNT = 0x000000e0, // software wait count
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BNKCMP = 0x00001f00, // bank compare
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WMASK = 0x00001ffe
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};
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uint32_t m_primary_bus_control;
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// internal stuff
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uint16_t m_irq_state;
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bool m_delayed;
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@ -768,9 +792,12 @@ protected:
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uint32_t * m_bootrom;
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bool m_mcbl_mode;
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bool m_hold_state;
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devcb_write8 m_xf0_cb;
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devcb_write8 m_xf1_cb;
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devcb_write8 m_iack_cb;
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devcb_write_line m_holda_cb;
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// tables
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static void (tms3203x_device::*const s_tms32031ops[])(uint32_t op);
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@ -784,6 +811,17 @@ protected:
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};
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// ======================> tms32030_device
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class tms32030_device : public tms3203x_device
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{
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public:
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// construction/destruction
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tms32030_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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void internal_32030(address_map &map);
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};
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// ======================> tms32031_device
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class tms32031_device : public tms3203x_device
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@ -807,6 +845,7 @@ public:
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// device type definition
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DECLARE_DEVICE_TYPE(TMS32030, tms32030_device)
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DECLARE_DEVICE_TYPE(TMS32031, tms32031_device)
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DECLARE_DEVICE_TYPE(TMS32032, tms32032_device)
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