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// license:BSD-3-Clause
// copyright-holders:smf
/*
* PlayStation DMA emulator
*
* Copyright 2003-2011 smf
*
*/
#ifndef MAME_CPU_PSX_DMA_H
#define MAME_CPU_PSX_DMA_H
#pragma once
DECLARE_DEVICE_TYPE(PSX_DMA, psxdma_device)
class psxdma_device : public device_t
{
public:
typedef delegate<void (uint32_t *, uint32_t, int32_t)> read_delegate;
typedef delegate<void (uint32_t *, uint32_t, int32_t)> write_delegate;
psxdma_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
//configuration helpers
auto irq() { return m_irq_handler.bind(); }
void install_read_handler( int n_channel, read_delegate p_fn_dma_read );
void install_write_handler( int n_channel, write_delegate p_fn_dma_write );
void write(offs_t offset, uint32_t data, uint32_t mem_mask = ~0);
uint32_t read(offs_t offset, uint32_t mem_mask = ~0);
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;
private:
struct psx_dma_channel
{
uint32_t n_base;
uint32_t n_blockcontrol;
uint32_t n_channelcontrol;
emu_timer *timer;
read_delegate fn_read;
write_delegate fn_write;
uint32_t n_ticks;
uint32_t b_running;
};
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();
TIMER_CALLBACK_MEMBER( dma_finished );
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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