1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
dimemory.cpp
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)
{
assert(0 <= spacenum);
if (spacenum >= int(m_address_map.size()))
m_address_map.resize(spacenum + 1);
m_address_map[spacenum] = std::move(map);
}
//-------------------------------------------------
// memory_translate - translate from logical to
// physical 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);
}
}
|