summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/nubus/nubus_image.cpp
blob: 2a13a9c86139b549451aa157a8fdb09e36724978 (plain) (blame)
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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
// license:BSD-3-Clause
// copyright-holders:R. Belmont
/***************************************************************************

  nubus_image.c - synthetic NuBus card to allow reading/writing "raw"
  HFS images, including floppy images (DD and HD) and vMac/Basilisk HDD
  volumes up to 256 MB in size.

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

#include "emu.h"
#include "nubus_image.h"
#include "osdcore.h"

#define IMAGE_ROM_REGION    "image_rom"
#define IMAGE_DISK0_TAG     "nb_disk"

#define MESSIMG_DISK_SECTOR_SIZE (512)

// on big-endian, these are NOPs.  (TODO: hey, where did WORDS_BIGENDIAN go since the GENie transition?!)
#if defined(__ppc__) || defined (__PPC__) || defined(__ppc64__) || defined(__PPC64__)
static UINT32 ni_htonl(UINT32 x) { return x; }
static UINT32 ni_ntohl(UINT32 x) { return x; }
#else
static UINT32 ni_htonl(UINT32 x) { return FLIPENDIAN_INT32(x); }
static UINT32 ni_ntohl(UINT32 x) { return FLIPENDIAN_INT32(x); }
#endif


// messimg_disk_image_device

class messimg_disk_image_device :   public device_t,
								public device_image_interface
{
public:
	// construction/destruction
	messimg_disk_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);

	// image-level overrides
	virtual iodevice_t image_type() const override { return IO_QUICKLOAD; }

	virtual bool is_readable()  const override { return 1; }
	virtual bool is_writeable() const override { return 1; }
	virtual bool is_creatable() const override { return 0; }
	virtual bool must_be_loaded() const override { return 0; }
	virtual bool is_reset_on_load() const override { return 0; }
	virtual const char *image_interface() const override { return nullptr; }
	virtual const char *file_extensions() const override { return "img"; }
	virtual const option_guide *create_option_guide() const override { return nullptr; }

	virtual bool call_load() override;
	virtual void call_unload() override;

	protected:
	// device-level overrides
	virtual void device_config_complete() override;
	virtual void device_start() override;
	virtual void device_reset() override;
public:
	UINT32 m_size;
	std::unique_ptr<UINT8[]> m_data;
	bool m_ejected;
};


// device type definition
extern const device_type MESSIMG_DISK;

const device_type MESSIMG_DISK = &device_creator<messimg_disk_image_device>;

messimg_disk_image_device::messimg_disk_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
	: device_t(mconfig, MESSIMG_DISK, "Mac image", tag, owner, clock, "messimg_disk_image", __FILE__),
		device_image_interface(mconfig, *this), m_size(0), m_data(nullptr), m_ejected(false)
{
}

void messimg_disk_image_device::device_config_complete()
{
	update_names(MESSIMG_DISK, "disk", "disk");
}


/*-------------------------------------------------
    device start callback
-------------------------------------------------*/

void messimg_disk_image_device::device_start()
{
	m_data = nullptr;

	if (exists() && fseek(0, SEEK_END) == 0)
	{
		m_size = (UINT32)ftell();
	}
}

bool messimg_disk_image_device::call_load()
{
	fseek(0, SEEK_END);
	m_size = (UINT32)ftell();
	if (m_size > (256*1024*1024))
	{
		printf("Mac image too large: must be 256MB or less!\n");
		m_size = 0;
		return IMAGE_INIT_FAIL;
	}

	m_data = make_unique_clear<UINT8[]>(m_size);
	fseek(0, SEEK_SET);
	fread(m_data.get(), m_size);
	m_ejected = false;

	return IMAGE_INIT_PASS;
}

void messimg_disk_image_device::call_unload()
{
	// TODO: track dirty sectors and only write those
	fseek(0, SEEK_SET);
	fwrite(m_data.get(), m_size);
	m_size = 0;
	//free(m_data);
}

/*-------------------------------------------------
    device reset callback
-------------------------------------------------*/

void messimg_disk_image_device::device_reset()
{
}

MACHINE_CONFIG_FRAGMENT( image )
	MCFG_DEVICE_ADD(IMAGE_DISK0_TAG, MESSIMG_DISK, 0)
MACHINE_CONFIG_END

ROM_START( image )
	ROM_REGION(0x2000, IMAGE_ROM_REGION, 0)
	ROM_LOAD( "nb_fake.bin",  0x000000, 0x002000, CRC(9264bac5) SHA1(540c2ce3c90382b2da6e1e21182cdf8fc3f0c930) )
ROM_END

//**************************************************************************
//  GLOBAL VARIABLES
//**************************************************************************

const device_type NUBUS_IMAGE = &device_creator<nubus_image_device>;


//-------------------------------------------------
//  machine_config_additions - device-specific
//  machine configurations
//-------------------------------------------------

machine_config_constructor nubus_image_device::device_mconfig_additions() const
{
	return MACHINE_CONFIG_NAME( image );
}

//-------------------------------------------------
//  rom_region - device-specific ROM region
//-------------------------------------------------

const rom_entry *nubus_image_device::device_rom_region() const
{
	return ROM_NAME( image );
}

//**************************************************************************
//  LIVE DEVICE
//**************************************************************************

//-------------------------------------------------
//  nubus_image_device - constructor
//-------------------------------------------------

nubus_image_device::nubus_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
		device_t(mconfig, NUBUS_IMAGE, "Disk Image Pseudo-Card", tag, owner, clock, "nb_image", __FILE__),
		device_nubus_card_interface(mconfig, *this), m_image(nullptr)
{
}

nubus_image_device::nubus_image_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
		device_t(mconfig, type, name, tag, owner, clock, shortname, source),
		device_nubus_card_interface(mconfig, *this), m_image(nullptr)
{
}

//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------

void nubus_image_device::device_start()
{
	UINT32 slotspace;
	UINT32 superslotspace;

	// set_nubus_device makes m_slot valid
	set_nubus_device();
	install_declaration_rom(this, IMAGE_ROM_REGION);

	slotspace = get_slotspace();
	superslotspace = get_super_slotspace();

//  printf("[image %p] slotspace = %x, super = %x\n", this, slotspace, superslotspace);

	m_nubus->install_device(slotspace, slotspace+3, read32_delegate(FUNC(nubus_image_device::image_r), this), write32_delegate(FUNC(nubus_image_device::image_w), this));
	m_nubus->install_device(slotspace+4, slotspace+7, read32_delegate(FUNC(nubus_image_device::image_status_r), this), write32_delegate(FUNC(nubus_image_device::image_status_w), this));
	m_nubus->install_device(slotspace+8, slotspace+11, read32_delegate(FUNC(nubus_image_device::file_cmd_r), this), write32_delegate(FUNC(nubus_image_device::file_cmd_w), this));
	m_nubus->install_device(slotspace+12, slotspace+15, read32_delegate(FUNC(nubus_image_device::file_data_r), this), write32_delegate(FUNC(nubus_image_device::file_data_w), this));
	m_nubus->install_device(slotspace+16, slotspace+19, read32_delegate(FUNC(nubus_image_device::file_len_r), this), write32_delegate(FUNC(nubus_image_device::file_len_w), this));
	m_nubus->install_device(slotspace+20, slotspace+147, read32_delegate(FUNC(nubus_image_device::file_name_r), this), write32_delegate(FUNC(nubus_image_device::file_name_w), this));
	m_nubus->install_device(superslotspace, superslotspace+((256*1024*1024)-1), read32_delegate(FUNC(nubus_image_device::image_super_r), this), write32_delegate(FUNC(nubus_image_device::image_super_w), this));

	m_image = subdevice<messimg_disk_image_device>(IMAGE_DISK0_TAG);

	filectx.curdir[0] = '.';
	filectx.curdir[1] = '\0';
	filectx.dirp = nullptr;
	filectx.fd = nullptr;
}

//-------------------------------------------------
//  device_reset - device-specific reset
//-------------------------------------------------

void nubus_image_device::device_reset()
{
}

WRITE32_MEMBER( nubus_image_device::image_status_w )
{
	m_image->m_ejected = true;
}

READ32_MEMBER( nubus_image_device::image_status_r )
{
	if(m_image->m_ejected) {
		return 0;
	}

	if(m_image->m_size) {
		return 1;
	}
	return 0;
}

WRITE32_MEMBER( nubus_image_device::image_w )
{
}

READ32_MEMBER( nubus_image_device::image_r )
{
	return m_image->m_size;
}

WRITE32_MEMBER( nubus_image_device::image_super_w )
{
	UINT32 *image = (UINT32*)m_image->m_data.get();
	data = ((data & 0xff) << 24) | ((data & 0xff00) << 8) | ((data & 0xff0000) >> 8) | ((data & 0xff000000) >> 24);
	mem_mask = ((mem_mask & 0xff) << 24) | ((mem_mask & 0xff00) << 8) | ((mem_mask & 0xff0000) >> 8) | ((mem_mask & 0xff000000) >> 24);

	COMBINE_DATA(&image[offset]);
}

READ32_MEMBER( nubus_image_device::image_super_r )
{
	UINT32 *image = (UINT32*)m_image->m_data.get();
	UINT32 data = image[offset];
	return ((data & 0xff) << 24) | ((data & 0xff00) << 8) | ((data & 0xff0000) >> 8) | ((data & 0xff000000) >> 24);
}

WRITE32_MEMBER( nubus_image_device::file_cmd_w )
{
	const osd::directory::entry *dp;
	char fullpath[1024];
	UINT64 filesize;

//  data = ((data & 0xff) << 24) | ((data & 0xff00) << 8) | ((data & 0xff0000) >> 8) | ((data & 0xff000000) >> 24);
	filectx.curcmd = data;
	switch(data) {
	case kFileCmdGetDir:
		strcpy((char*)filectx.filename, (char*)filectx.curdir);
		break;
	case kFileCmdSetDir:
		if ((filectx.filename[0] == '/') || (filectx.filename[0] == '$')) {
			strcpy((char*)filectx.curdir, (char*)filectx.filename);
		} else {
			strcat((char*)filectx.curdir, "/");
			strcat((char*)filectx.curdir, (char*)filectx.filename);
		}
		break;
	case kFileCmdGetFirstListing:
		filectx.dirp = osd::directory::open((const char *)filectx.curdir);
	case kFileCmdGetNextListing:
		if (filectx.dirp) {
			dp = filectx.dirp->read();
			if(dp) {
				strncpy((char*)filectx.filename, dp->name, sizeof(filectx.filename));
			} else {
				memset(filectx.filename, 0, sizeof(filectx.filename));
			}
		}
		else {
			memset(filectx.filename, 0, sizeof(filectx.filename));
		}
		break;
	case kFileCmdGetFile:
		memset(fullpath, 0, sizeof(fullpath));
		strcpy(fullpath, (const char *)filectx.curdir);
		strcat(fullpath, "/");
		strcat(fullpath, (const char*)filectx.filename);
		if(osd_file::open(std::string(fullpath), OPEN_FLAG_READ, filectx.fd, filectx.filelen) != osd_file::error::NONE) printf("Error opening %s\n", fullpath);
		filectx.bytecount = 0;
		break;
	case kFileCmdPutFile:
		memset(fullpath, 0, sizeof(fullpath));
		strcpy(fullpath, (const char *)filectx.curdir);
		strcat(fullpath, "/");
		strcat(fullpath, (const char*)filectx.filename);
		if(osd_file::open(std::string(fullpath), OPEN_FLAG_WRITE|OPEN_FLAG_CREATE, filectx.fd, filesize) != osd_file::error::NONE) printf("Error opening %s\n", fullpath);
		filectx.bytecount = 0;
		break;
	}
}

READ32_MEMBER( nubus_image_device::file_cmd_r )
{
	return 0;
}

WRITE32_MEMBER( nubus_image_device::file_data_w )
{
	std::uint32_t count = 4;
	std::uint32_t actualcount = 0;

	data = ((data & 0xff) << 24) | ((data & 0xff00) << 8) | ((data & 0xff0000) >> 8) | ((data & 0xff000000) >> 24);
	if(filectx.fd) {
		//data = ni_ntohl(data);
		if((filectx.bytecount + count) > filectx.filelen) count = filectx.filelen - filectx.bytecount;
		filectx.fd->write(&data, filectx.bytecount, count, actualcount);
		filectx.bytecount += actualcount;

		if(filectx.bytecount >= filectx.filelen) {
			filectx.fd.reset();
		}
	}
}

READ32_MEMBER( nubus_image_device::file_data_r )
{
	if(filectx.fd) {
		std::uint32_t ret;
		std::uint32_t actual = 0;
		filectx.fd->read(&ret, filectx.bytecount, sizeof(ret), actual);
		filectx.bytecount += actual;
		if(actual < sizeof(ret)) {
			filectx.fd.reset();
		}
		return ni_htonl(ret);
	}
	return 0;
}

WRITE32_MEMBER( nubus_image_device::file_len_w )
{
	data = ((data & 0xff) << 24) | ((data & 0xff00) << 8) | ((data & 0xff0000) >> 8) | ((data & 0xff000000) >> 24);
	filectx.filelen = ni_ntohl(data);
}

READ32_MEMBER( nubus_image_device::file_len_r )
{
	return filectx.filelen;
}

WRITE32_MEMBER( nubus_image_device::file_name_w )
{
	((UINT32*)(filectx.filename))[offset] = ni_ntohl(data);
}

READ32_MEMBER( nubus_image_device::file_name_r )
{
	UINT32 ret;
	ret = ni_htonl(((UINT32*)(filectx.filename))[offset]);
	return ret;
}