xref: /netbsd-src/sys/arch/hpc/stand/hpcboot/memory.cpp (revision 17dd36da8292193180754d5047c0926dbb56818c)
1 /*	$NetBSD: memory.cpp,v 1.2 2001/03/25 17:14:53 uch Exp $	*/
2 
3 /*-
4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by UCHIYAMA Yasushi.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. All advertising materials mentioning features or use of this software
19  *    must display the following acknowledgement:
20  *        This product includes software developed by the NetBSD
21  *        Foundation, Inc. and its contributors.
22  * 4. Neither the name of The NetBSD Foundation nor the names of its
23  *    contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36  * POSSIBILITY OF SUCH DAMAGE.
37  */
38 
39 #include <memory.h>
40 #include <console.h>
41 
42 MemoryManager::MemoryManager(Console *&cons, size_t pagesize)
43 	: _cons(cons)
44 {
45 	_debug = FALSE;
46 	_page_size =pagesize;
47 
48 	int mask = _page_size;
49 	for (_page_shift = 0; !(mask & 1); _page_shift++)
50 		mask >>= 1;
51 
52 	_page_per_region = WCE_REGION_SIZE / _page_size;
53 	_nbank = 0;
54 	DPRINTF((TEXT("Page size %dbyte %dpages/region\n"),
55 		 _page_size , _page_per_region));
56 	_addr_table_idx = 0;
57 	_addr_table = 0;
58 	_memory = 0;
59 }
60 
61 MemoryManager::~MemoryManager(void)
62 {
63 	if (_memory)
64 		VirtualFree(LPVOID(_memory), 0, MEM_RELEASE);
65 }
66 
67 void
68 MemoryManager::loadBank(paddr_t paddr, psize_t psize)
69 {
70 	struct MemoryManager::bank *b = &_bank[_nbank++];
71 	b->addr = paddr;
72 	b->size = psize;
73 	DPRINTF((TEXT("Bank#%d 0x%08x size 0x%08x\n"), _nbank - 1,
74 		 b->addr, b->size));
75 }
76 
77 BOOL
78 MemoryManager::reservePage(vsize_t size, BOOL page_commit)
79 {
80 	// My virtual memory space
81 	vaddr_t vbase;
82 	vsize_t vsize;
83 
84 	int i, npage;
85 
86 	if (size == 0)
87 		return FALSE;
88 
89   // reserve all virtual memory.
90 	vsize = roundRegion(size);
91 	npage = roundPage(size) / _page_size;
92 
93 	size_t tabsz = sizeof(struct AddressTranslationTable) * npage;
94 	_addr_table = static_cast <struct AddressTranslationTable *>
95 		(malloc(tabsz));
96 	if (_addr_table == NULL) {
97 		DPRINTF((TEXT("can't allocate memory for translation table.\n")));
98 		return FALSE;
99 	}
100 	DPRINTF((TEXT("address translation table %d pages.(%d byte)\n"), npage,
101 		 tabsz));
102 
103 	if (page_commit)
104 		vbase = vaddr_t(VirtualAlloc(0, vsize, MEM_RESERVE,
105 					     PAGE_NOACCESS));
106 	else
107 		vbase = vaddr_t(VirtualAlloc(0, vsize, MEM_COMMIT,
108 					     PAGE_READWRITE | PAGE_NOCACHE));
109 
110 	if (vbase == 0) {
111 		DPRINTF((TEXT("can't allocate memory\n")));
112 		return FALSE;
113 	}
114 	_memory = vbase;
115 
116   // find physical address of allocated page.
117 	AddressTranslationTable *tab = _addr_table;
118 	_naddr_table = 0;
119 	for (i = 0; i < npage; i++) {
120 		vaddr_t vaddr;
121 		paddr_t paddr = ~0;
122 
123 		if (page_commit)
124 			// now map to physical page.
125 			vaddr = vaddr_t(VirtualAlloc(
126 				LPVOID(vbase + _page_size * i),
127 				_page_size, MEM_COMMIT,
128 				PAGE_READWRITE | PAGE_NOCACHE));
129 		else
130 			vaddr = vbase + _page_size * i;
131 
132 		paddr = searchPage(vaddr);
133 
134 		if (paddr == ~0) {
135 			DPRINTF((TEXT("page#%d not found\n"), i));
136 			break;
137 		} else {
138 #ifdef MEMORY_MAP_DEBUG
139 			DPRINTF((TEXT("page %d vaddr=0x%08x paddr=0x%08x\n"),
140 				 _naddr_table, vaddr, paddr));
141 #endif
142 			tab->vaddr = vaddr;
143 			tab->paddr = paddr;
144 			++tab;
145 			++_naddr_table;
146 		}
147 	}
148 
149 #ifdef MEMORY_MAP_DEBUG
150 	// dump virtual <-> physical address table
151 	tab = _addr_table;
152 	for (i = 0; i < _naddr_table;) {
153 		for (int j = 0; j < 4; j++, i++, tab++)
154 			DPRINTF((TEXT("%08x=%08x "), tab->vaddr, tab->paddr));
155 		DPRINTF((TEXT("\n")));
156 	}
157 #endif
158 	DPRINTF((TEXT("allocated %d page. mapped %d page.\n"), npage,
159 		 _naddr_table));
160 
161 	return TRUE;
162 }
163 
164 BOOL
165 MemoryManager::getPage(vaddr_t &vaddr, paddr_t &paddr)
166 {
167 	/* get plain page from the top */
168 	int idx = --_naddr_table;
169 
170 	if (idx < 0 || _addr_table == NULL)
171 		return FALSE;
172 
173 	AddressTranslationTable *tab = &_addr_table[idx];
174 	vaddr = tab->vaddr;
175 	paddr = tab->paddr;
176 
177 	return TRUE;
178 }
179 
180 BOOL
181 MemoryManager::getTaggedPage(vaddr_t &vaddr, paddr_t &paddr)
182 {
183 	/* get tagged page from the bottom */
184 	if (_addr_table_idx >= _naddr_table ||
185 	    _addr_table == NULL) {
186 		DPRINTF((TEXT("page insufficient.\n")));
187 		return FALSE;
188 	}
189 	AddressTranslationTable *tab =
190 		&_addr_table[_addr_table_idx++];
191 	vaddr = tab->vaddr;
192 	paddr = tab->paddr;
193 
194 	return TRUE;
195 }
196 
197 BOOL
198 MemoryManager::getTaggedPage(vaddr_t &v, paddr_t &p,
199 			     struct PageTag **pvec, paddr_t &pvec_paddr)
200 {
201 	if (!getTaggedPage(v, p))
202 		return FALSE;
203 
204 	*pvec =(struct PageTag *)v;
205 	memset(*pvec, 0, sizeof(struct PageTag));
206 	v += sizeof(struct PageTag);
207 	pvec_paddr = p;
208 	p += sizeof(struct PageTag);
209 
210 	return TRUE;
211 }
212 
213 vaddr_t
214 MemoryManager::mapPhysicalPage(paddr_t paddr, psize_t size, u_int32_t flags)
215 {
216 	paddr_t pstart = truncPage(paddr);
217 	paddr_t pend = roundPage(paddr + size);
218 	psize_t psize = pend - pstart;
219 
220 	LPVOID p = VirtualAlloc(0, psize, MEM_RESERVE, PAGE_NOACCESS);
221 
222 	int ok = VirtualCopy(p, LPVOID(pstart >> 8), psize,
223 			     flags | PAGE_NOCACHE | PAGE_PHYSICAL);
224 	if (!ok) {
225 		DPRINTF((TEXT("can't map physical address 0x%08x\n"), paddr));
226 		return ~0;
227 	}
228 #if 0
229 	DPRINTF((TEXT("start=0x%08x end=0x%08x size=0x%08x return=0x%08x\n"),
230 		 pstart, pend, psize, vaddr_t(p) + vaddr_t(paddr - pstart)));
231 
232 #endif
233 
234 	return vaddr_t(p) + vaddr_t(paddr - pstart);
235 }
236 
237 void
238 MemoryManager::unmapPhysicalPage(vaddr_t vaddr)
239 {
240 	int ok = VirtualFree(LPVOID(truncPage(vaddr)), 0, MEM_RELEASE);
241 	if (!ok)
242 		DPRINTF((TEXT("can't release memory\n")));
243 }
244 
245 u_int32_t
246 MemoryManager::readPhysical4(paddr_t paddr)
247 {
248 	vaddr_t v = mapPhysicalPage(paddr, 4, PAGE_READONLY);
249 	u_int32_t val = *(u_int32_t *)v;
250 	unmapPhysicalPage(v);
251 	return val;
252 }
253 
254 //
255 //	Use LockPages()
256 //
257 MemoryManager_LockPages::MemoryManager_LockPages
258 (BOOL(*lock_pages)(LPVOID, DWORD, PDWORD, int),
259  BOOL(*unlock_pages)(LPVOID, DWORD),
260  Console *&cons, size_t pagesize, int shift)
261 	:  MemoryManager(cons, pagesize)
262 {
263 	_lock_pages	= lock_pages;
264 	_unlock_pages	= unlock_pages;
265 	_shift = shift;
266 	DPRINTF((TEXT("use LockPages method.\n")));
267 }
268 
269 MemoryManager_LockPages::~MemoryManager_LockPages(void)
270 {
271 }
272 
273 paddr_t
274 MemoryManager_LockPages::searchPage(vaddr_t vaddr)
275 {
276 	paddr_t paddr = ~0;
277 
278 	if (!_lock_pages(LPVOID(vaddr), _page_size, PDWORD(&paddr), 1))
279 		return paddr;
280 
281 	if (!_unlock_pages(LPVOID(vaddr), _page_size)) {
282 		DPRINTF((TEXT("can't unlock pages\n")));
283 	}
284 
285 	return(paddr >>(_page_shift - _shift)) << _page_shift;
286 }
287 
288 //
289 //	Use VirtualCopy()
290 //
291 MemoryManager_VirtualCopy::MemoryManager_VirtualCopy(Console *&cons,
292 						     size_t pagesize)
293 	: MemoryManager(cons, pagesize)
294 {
295 	_search_guess = 0;
296 	DPRINTF((TEXT("use VirtualCopy method.\n")));
297 }
298 
299 MemoryManager_VirtualCopy::~MemoryManager_VirtualCopy(void)
300 {
301 }
302 
303 paddr_t
304 MemoryManager_VirtualCopy::searchPage(vaddr_t vaddr)
305 {
306 	paddr_t paddr = ~0;
307 	int i;
308 
309 	// search all D-RAM bank.
310 	setMagic(vaddr);
311  retry:
312 	for (i = 0; i < _nbank; i++) {
313 		paddr = searchBank(i);
314 		if (paddr != ~0)
315 			break;
316 	}
317 	if (_search_guess != 0 && paddr == ~0) {
318 		_search_guess = 0;
319 		goto retry;
320 	}
321 
322 	clearMagic();
323 
324 	return paddr;
325 }
326 
327 paddr_t
328 MemoryManager_VirtualCopy::searchBank(int banknum)
329 {
330 	LPVOID ref;
331 	paddr_t paddr, pstart, pend, pfound = ~0;
332 	paddr_t bstart, bend;
333 	vaddr_t ofs;
334 
335 	bstart = _bank[banknum].addr;
336 	bend = _bank[banknum].addr + _bank[banknum].size;
337 
338 	pstart = _search_guess ? _search_guess : bstart;
339 	pend = bend;
340 
341 	if (pstart < bstart || pstart >= pend)
342 		return pfound;
343 
344 	// reserve physical reference region
345 	ref = VirtualAlloc(0, BLOCK_SIZE, MEM_RESERVE, PAGE_NOACCESS);
346 	if (ref == 0) {
347 		DPRINTF((TEXT("can't allocate virtual memory.\n")));
348 		return pfound;
349 	}
350 
351 	for (paddr = pstart; paddr < pend; paddr += BLOCK_SIZE) {
352 		if (!VirtualCopy(ref, LPVOID(paddr >> 8), BLOCK_SIZE,
353 				 PAGE_READONLY | PAGE_NOCACHE |
354 				 PAGE_PHYSICAL)) {
355 			DPRINTF((TEXT("can't map physical addr 0x%08x(->0x%08x)\n"),
356 				 ref, paddr));
357 			goto release;
358 		}
359 
360 		// search magic in this region.
361 		ofs = checkMagicRegion(vaddr_t(ref), BLOCK_SIZE, _page_size);
362 
363 		// decommit reference region.
364 		if (!VirtualFree(ref, BLOCK_SIZE, MEM_DECOMMIT)) {
365 			DPRINTF((TEXT("can't decommit addr 0x%08x(->0x%08x)\n"),
366 				 ref, paddr));
367 			goto release;
368 		}
369 
370 		if (ofs != ~0) {
371 			pfound = paddr + ofs;
372 			_search_guess = paddr;
373 			break;
374 		}
375 	}
376  release:
377 	if (!VirtualFree(ref, 0, MEM_RELEASE))
378 		DPRINTF((TEXT("can't release memory\n")));
379 
380 	return pfound;
381 }
382