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// license:BSD-3-Clause
// copyright-holders:smf
/*
* PlayStation DMA emulator
*
* Copyright 2003-2011 smf
*
*/
#pragma once
#ifndef __PSXDMA_H__
#define __PSXDMA_H__
#include "emu.h"
extern const device_type PSX_DMA;
#define MCFG_PSX_DMA_IRQ_HANDLER(_devcb) \
devcb = &psxdma_device::set_irq_handler(*device, DEVCB_##_devcb);
typedef delegate<void (uint32_t *, uint32_t, int32_t)> psx_dma_read_delegate;
typedef delegate<void (uint32_t *, uint32_t, int32_t)> psx_dma_write_delegate;
struct psx_dma_channel
{
uint32_t n_base;
uint32_t n_blockcontrol;
uint32_t n_channelcontrol;
emu_timer *timer;
psx_dma_read_delegate fn_read;
psx_dma_write_delegate fn_write;
uint32_t n_ticks;
uint32_t b_running;
};
class psxdma_device : public device_t
{
public:
psxdma_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// static configuration helpers
template<class _Object> static devcb_base &set_irq_handler(device_t &device, _Object object) { return downcast<psxdma_device &>(device).m_irq_handler.set_callback(object); }
void install_read_handler( int n_channel, psx_dma_read_delegate p_fn_dma_read );
void install_write_handler( int n_channel, psx_dma_read_delegate p_fn_dma_write );
DECLARE_WRITE32_MEMBER( write );
DECLARE_READ32_MEMBER( read );
uint32_t *m_ram;
size_t m_ramsize;
protected:
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_post_load() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
void dma_start_timer( int n_channel, uint32_t n_ticks );
void dma_stop_timer( int n_channel );
void dma_timer_adjust( int n_channel );
void dma_interrupt_update();
void dma_finished( int n_channel );
psx_dma_channel m_channel[7];
uint32_t m_dpcp;
uint32_t m_dicr;
devcb_write_line m_irq_handler;
};
#endif
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