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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
/******************************************************************************
*
* Sony PlayStation 2 IOP interrupt controller device skeleton
*
* To Do:
* Everything
*
*/
#include "emu.h"
#include "iopintc.h"
DEFINE_DEVICE_TYPE(SONYIOP_INTC, iop_intc_device, "iopintc", "PlayStation 2 IOP INTC")
iop_intc_device::iop_intc_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: device_t(mconfig, SONYIOP_INTC, tag, owner, clock)
, m_iop(*this, finder_base::DUMMY_TAG)
{
}
iop_intc_device::~iop_intc_device()
{
}
void iop_intc_device::device_start()
{
save_item(NAME(m_status));
save_item(NAME(m_mask));
save_item(NAME(m_enabled));
}
void iop_intc_device::device_reset()
{
m_status = 0;
m_mask = 0;
m_enabled = false;
}
uint32_t iop_intc_device::read(offs_t offset, uint32_t mem_mask)
{
uint32_t ret = 0;
switch (offset)
{
case 0: // I_STAT
ret = m_status;
//logerror("%s: read: I_STAT %08x & %08x\n", machine().describe_context(), ret, mem_mask);
break;
case 1: // I_MASK
ret = m_mask;
//logerror("%s: read: I_MASK %08x & %08x\n", machine().describe_context(), ret, mem_mask);
break;
case 2: // I_ENABLE
ret = m_enabled ? 1 : 0;
m_enabled = false;
update_interrupts();
//logerror("%s: read: I_ENABLE %08x & %08x\n", machine().describe_context(), ret, mem_mask);
break;
default:
logerror("%s: read: Unknown offset %08x & %08x\n", machine().describe_context(), 0x1f801070 + (offset << 2), mem_mask);
break;
}
return ret;
}
void iop_intc_device::write(offs_t offset, uint32_t data, uint32_t mem_mask)
{
switch (offset)
{
case 0: // I_STAT
//logerror("%s: write: I_STAT = %08x & %08x\n", machine().describe_context(), data, mem_mask);
m_status &= data;
update_interrupts();
break;
case 1: // I_MASK
//logerror("%s: write: I_MASK = %08x & %08x\n", machine().describe_context(), data, mem_mask);
m_mask = data;
update_interrupts();
break;
case 2: // I_ENABLE
//logerror("%s: write: I_ENABLE = %08x & %08x\n", machine().describe_context(), data, mem_mask);
m_enabled = BIT(data, 0);
update_interrupts();
break;
default:
logerror("%s: write: Unknown offset %08x = %08x & %08x\n", machine().describe_context(), 0x1f801070 + (offset << 2), data, mem_mask);
break;
}
}
void iop_intc_device::raise_interrupt(uint32_t line)
{
//logerror("%s: raise_interrupt: %d\n", machine().describe_context(), line);
m_status |= (1 << line);
update_interrupts();
}
void iop_intc_device::update_interrupts()
{
bool active = (m_enabled && (m_status & m_mask));
//printf("iop_intc: %d && (%08x & %08x) = %d\n", m_enabled, m_status, m_mask, active);
m_iop->set_input_line(INPUT_LINE_IRQ0, active ? ASSERT_LINE : CLEAR_LINE);
}
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