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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/***************************************************************************

    machine/lpci.h

    Legacy PCI bus

***************************************************************************/

#ifndef MAME_MACHINE_LPCI_H
#define MAME_MACHINE_LPCI_H

#pragma once

//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> pci_bus_legacy_device

class pci_bus_legacy_device :  public device_t
{
public:
	typedef device_delegate<uint32_t (int function, int reg, uint32_t mem_mask)> pci_bus_legacy_read_delegate;
	typedef device_delegate<void (int function, int reg, uint32_t data, uint32_t mem_mask)> pci_bus_legacy_write_delegate;

	// construction/destruction
	pci_bus_legacy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, uint8_t busnum)
		: pci_bus_legacy_device(mconfig, tag, owner, clock)
	{
		set_busnum(busnum);
	}
	pci_bus_legacy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	uint32_t read(offs_t offset, uint32_t mem_mask = ~0);
	void write(offs_t offset, uint32_t data, uint32_t mem_mask = ~0);

	uint64_t read_64be(offs_t offset, uint64_t mem_mask = ~0);
	void write_64be(offs_t offset, uint64_t data, uint64_t mem_mask = ~0);

	void set_busnum(int busnum) { m_busnum = busnum; }
	template <typename T>
	void set_father(T &&tag) { m_father.set_tag(std::forward<T>(tag)); }

	template <typename F, typename G>
	void set_device(int num, F &&read, const char *rname, G &&write, const char *wname)
	{
		m_read_callback[num].set(std::forward<F>(read), rname);
		m_write_callback[num].set(std::forward<G>(write), wname);
	}

	template <typename T, typename F, typename G>
	void set_device(int num, T &&target, F &&read, const char *rname, G &&write, const char *wname)
	{
		m_read_callback[num].set(target, std::forward<F>(read), rname);
		m_write_callback[num].set(target, std::forward<G>(write), wname);
	}

	pci_bus_legacy_device *pci_search_bustree(int busnum, int devicenum, pci_bus_legacy_device *pcibus);
	void add_sibling(pci_bus_legacy_device *sibling, int busnum);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_post_load() override;

private:
	uint8_t             m_busnum;
	pci_bus_legacy_read_delegate::array<32> m_read_callback;
	pci_bus_legacy_write_delegate::array<32> m_write_callback;
	optional_device<pci_bus_legacy_device> m_father;
	pci_bus_legacy_device * m_siblings[8];
	uint8_t             m_siblings_busnum[8];
	int                 m_siblings_count;

	offs_t              m_address;
	int8_t              m_devicenum; // device number we are addressing
	int8_t              m_busnumber; // pci bus number we are addressing
	pci_bus_legacy_device * m_busnumaddr; // pci bus we are addressing
};

// device type definition
DECLARE_DEVICE_TYPE(PCI_BUS_LEGACY, pci_bus_legacy_device)

#endif // MAME_MACHINE_LPCI_H