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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
dimemory.c
Device memory interfaces.
***************************************************************************/
#include "emu.h"
//**************************************************************************
// CONSTANTS
//**************************************************************************
//const int TRIGGER_SUSPENDTIME = -4000;
//**************************************************************************
// MEMORY DEVICE MANAGEMENT
//**************************************************************************
//-------------------------------------------------
// device_memory_interface - constructor
//-------------------------------------------------
device_memory_interface::device_memory_interface(const machine_config &mconfig, device_t &device)
: device_interface(device, "memory")
{
// configure the fast accessor
device.interfaces().m_memory = this;
}
//-------------------------------------------------
// ~device_memory_interface - destructor
//-------------------------------------------------
device_memory_interface::~device_memory_interface()
{
}
//-------------------------------------------------
// set_addrmap - connect an address map to a device
//-------------------------------------------------
void device_memory_interface::set_addrmap(int spacenum, address_map_constructor map)
{
if (spacenum >= int(m_address_map.size()))
m_address_map.resize(spacenum+1);
m_address_map[spacenum] = map;
}
//-------------------------------------------------
// memory_translate - translate from logical to
// phyiscal addresses; designed to be overridden
// by the actual device implementation if address
// translation is supported
//-------------------------------------------------
bool device_memory_interface::memory_translate(int spacenum, int intention, offs_t &address)
{
// by default it maps directly
return true;
}
//-------------------------------------------------
// interface_config_complete - perform final
// memory configuration setup
//-------------------------------------------------
void device_memory_interface::interface_config_complete()
{
const space_config_vector r = memory_space_config();
for (const auto &entry : r) {
if (entry.first >= int(m_address_config.size()))
m_address_config.resize(entry.first + 1);
m_address_config[entry.first] = entry.second;
}
}
//-------------------------------------------------
// interface_validity_check - perform validity
// checks on the memory configuration
//-------------------------------------------------
void device_memory_interface::interface_validity_check(validity_checker &valid) const
{
// loop over all address spaces
const int max_spaces = std::max(m_address_map.size(), m_address_config.size());
for (int spacenum = 0; spacenum < max_spaces; ++spacenum)
{
const address_space_config *config = space_config(spacenum);
if (config != nullptr)
{
// validate data width
int width = config->data_width();
if (width != 8 && width != 16 && width != 32 && width != 64)
osd_printf_error("Invalid data width %d specified for address space %d\n", width, spacenum);
// validate address shift
int shift = config->addr_shift();
if (shift < 0 && (width >> -shift) < 8)
osd_printf_error("Invalid shift %d specified for address space %d\n", shift, spacenum);
// construct the map
::address_map addrmap(const_cast<device_t &>(device()), spacenum);
// let the map check itself
addrmap.map_validity_check(valid, spacenum);
}
else if (spacenum < int(m_address_map.size()) && !m_address_map[spacenum].isnull())
osd_printf_warning("Map configured for nonexistent memory space %d\n", spacenum);
}
}
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