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Kevin O'Connore54ee382009-07-26 19:33:13 -04001// Post memory manager (PMM) calls
2//
3// Copyright (C) 2009 Kevin O'Connor <kevin@koconnor.net>
4//
5// This file may be distributed under the terms of the GNU LGPLv3 license.
6
7#include "util.h" // checksum
8#include "config.h" // BUILD_BIOS_ADDR
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -04009#include "memmap.h" // struct e820entry
Kevin O'Connor0bf92702009-08-01 11:45:37 -040010#include "farptr.h" // GET_FARVAR
Kevin O'Connorf416fe92009-09-24 20:51:55 -040011#include "biosvar.h" // GET_BDA
Kevin O'Connor0bf92702009-08-01 11:45:37 -040012
13
Kevin O'Connor52a300f2009-12-26 23:32:57 -050014#if MODESEGMENT
Kevin O'Connor0bf92702009-08-01 11:45:37 -040015// The 16bit pmm entry points runs in "big real" mode, and can
16// therefore read/write to the 32bit malloc variables.
Kevin O'Connoreda2c832009-12-27 00:14:26 -050017#define GET_PMMVAR(var) ({ \
18 SET_SEG(ES, 0); \
19 __GET_VAR("addr32 ", ES, (var)); })
20#define SET_PMMVAR(var, val) do { \
21 SET_SEG(ES, 0); \
22 __SET_VAR("addr32 ", ES, (var), (val)); \
23 } while (0)
Kevin O'Connor0bf92702009-08-01 11:45:37 -040024#else
25#define GET_PMMVAR(var) (var)
26#define SET_PMMVAR(var, val) do { (var) = (val); } while (0)
27#endif
28
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -040029// Information on a reserved area.
30struct allocinfo_s {
31 struct allocinfo_s *next, **pprev;
32 void *data, *dataend, *allocend;
Kevin O'Connor0bf92702009-08-01 11:45:37 -040033};
34
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -040035// Information on a tracked memory allocation.
36struct allocdetail_s {
37 struct allocinfo_s detailinfo;
38 struct allocinfo_s datainfo;
39 u32 handle;
40};
41
42// The various memory zones.
43struct zone_s {
44 struct allocinfo_s *info;
45};
46
47struct zone_s ZoneLow VAR32FLATVISIBLE;
48struct zone_s ZoneHigh VAR32FLATVISIBLE;
Kevin O'Connor52a300f2009-12-26 23:32:57 -050049struct zone_s ZoneFSeg VAR32FLATVISIBLE;
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -040050struct zone_s ZoneTmpLow VAR32FLATVISIBLE;
51struct zone_s ZoneTmpHigh VAR32FLATVISIBLE;
Kevin O'Connor0bf92702009-08-01 11:45:37 -040052
Kevin O'Connor52a300f2009-12-26 23:32:57 -050053struct zone_s *Zones[] VAR32FLATVISIBLE = {
Kevin O'Connor0e9fd612009-08-22 21:31:58 -040054 &ZoneTmpLow, &ZoneLow, &ZoneFSeg, &ZoneTmpHigh, &ZoneHigh
Kevin O'Connor0bf92702009-08-01 11:45:37 -040055};
56
Kevin O'Connorf416fe92009-09-24 20:51:55 -040057
58/****************************************************************
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -040059 * low-level memory reservations
60 ****************************************************************/
61
62// Find and reserve space from a given zone
63static void *
64allocSpace(struct zone_s *zone, u32 size, u32 align, struct allocinfo_s *fill)
65{
66 struct allocinfo_s *info;
67 for (info = GET_PMMVAR(zone->info); info; info = GET_PMMVAR(info->next)) {
68 void *dataend = GET_PMMVAR(info->dataend);
69 void *allocend = GET_PMMVAR(info->allocend);
70 void *newallocend = (void*)ALIGN_DOWN((u32)allocend - size, align);
71 if (newallocend >= dataend && newallocend <= allocend) {
72 // Found space - now reserve it.
73 struct allocinfo_s **pprev = GET_PMMVAR(info->pprev);
74 if (!fill)
75 fill = newallocend;
76 SET_PMMVAR(fill->next, info);
77 SET_PMMVAR(fill->pprev, pprev);
78 SET_PMMVAR(fill->data, newallocend);
79 SET_PMMVAR(fill->dataend, newallocend + size);
80 SET_PMMVAR(fill->allocend, allocend);
81
82 SET_PMMVAR(info->allocend, newallocend);
83 SET_PMMVAR(info->pprev, &fill->next);
84 SET_PMMVAR(*pprev, fill);
85 return newallocend;
86 }
87 }
88 return NULL;
89}
90
91// Release space allocated with allocSpace()
92static void
93freeSpace(struct allocinfo_s *info)
94{
95 struct allocinfo_s *next = GET_PMMVAR(info->next);
96 struct allocinfo_s **pprev = GET_PMMVAR(info->pprev);
97 SET_PMMVAR(*pprev, next);
98 if (next) {
99 if (GET_PMMVAR(next->allocend) == GET_PMMVAR(info->data))
100 SET_PMMVAR(next->allocend, GET_PMMVAR(info->allocend));
101 SET_PMMVAR(next->pprev, pprev);
102 }
103}
104
105// Add new memory to a zone
106static void
107addSpace(struct zone_s *zone, void *start, void *end)
108{
109 // Find position to add space
110 struct allocinfo_s **pprev = &zone->info, *info;
111 for (;;) {
112 info = GET_PMMVAR(*pprev);
113 if (!info || GET_PMMVAR(info->data) < start)
114 break;
115 pprev = &info->next;
116 }
117
118 // Add space using temporary allocation info.
119 struct allocdetail_s tempdetail;
120 tempdetail.datainfo.next = info;
121 tempdetail.datainfo.pprev = pprev;
122 tempdetail.datainfo.data = tempdetail.datainfo.dataend = start;
123 tempdetail.datainfo.allocend = end;
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400124 struct allocdetail_s *tempdetailp = MAKE_FLATPTR(GET_SEG(SS), &tempdetail);
125 SET_PMMVAR(*pprev, &tempdetailp->datainfo);
126 if (info)
127 SET_PMMVAR(info->pprev, &tempdetailp->datainfo.next);
128
129 // Allocate final allocation info.
130 struct allocdetail_s *detail = allocSpace(
131 &ZoneTmpHigh, sizeof(*detail), MALLOC_MIN_ALIGN, NULL);
132 if (!detail) {
133 detail = allocSpace(&ZoneTmpLow, sizeof(*detail)
134 , MALLOC_MIN_ALIGN, NULL);
135 if (!detail) {
136 SET_PMMVAR(*tempdetail.datainfo.pprev, tempdetail.datainfo.next);
137 if (tempdetail.datainfo.next)
138 SET_PMMVAR(tempdetail.datainfo.next->pprev
139 , tempdetail.datainfo.pprev);
140 warn_noalloc();
141 return;
142 }
143 }
144
145 // Replace temp alloc space with final alloc space
Kevin O'Connor8f59aa32010-06-06 16:11:45 -0400146 memcpy_fl(&detail->datainfo, &tempdetailp->datainfo
147 , sizeof(detail->datainfo));
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400148 SET_PMMVAR(detail->handle, PMM_DEFAULT_HANDLE);
149
150 SET_PMMVAR(*tempdetail.datainfo.pprev, &detail->datainfo);
151 if (tempdetail.datainfo.next)
152 SET_PMMVAR(tempdetail.datainfo.next->pprev, &detail->datainfo.next);
153}
154
155// Search all zones for an allocation obtained from allocSpace()
156static struct allocinfo_s *
157findAlloc(void *data)
158{
159 int i;
160 for (i=0; i<ARRAY_SIZE(Zones); i++) {
161 struct zone_s *zone = GET_PMMVAR(Zones[i]);
162 struct allocinfo_s *info;
163 for (info = GET_PMMVAR(zone->info); info; info = GET_PMMVAR(info->next))
164 if (GET_PMMVAR(info->data) == data)
165 return info;
166 }
167 return NULL;
168}
169
170// Return the last sentinal node of a zone
171static struct allocinfo_s *
172findLast(struct zone_s *zone)
173{
174 struct allocinfo_s *info = GET_PMMVAR(zone->info);
175 if (!info)
176 return NULL;
177 for (;;) {
178 struct allocinfo_s *next = GET_PMMVAR(info->next);
179 if (!next)
180 return info;
181 info = next;
182 }
183}
184
185
186/****************************************************************
187 * Setup
188 ****************************************************************/
189
190void
191malloc_setup(void)
192{
193 ASSERT32FLAT();
194 dprintf(3, "malloc setup\n");
195
196 ZoneLow.info = ZoneHigh.info = ZoneFSeg.info = NULL;
197 ZoneTmpLow.info = ZoneTmpHigh.info = NULL;
198
199 // Clear memory in 0xf0000 area.
200 extern u8 code32flat_start[];
201 if ((u32)code32flat_start > BUILD_BIOS_ADDR)
202 // Clear unused parts of f-segment
203 memset((void*)BUILD_BIOS_ADDR, 0
204 , (u32)code32flat_start - BUILD_BIOS_ADDR);
205 memset(BiosTableSpace, 0, CONFIG_MAX_BIOSTABLE);
206
207 // Populate temp high ram
208 u32 highram = 0;
209 int i;
210 for (i=e820_count-1; i>=0; i--) {
211 struct e820entry *en = &e820_list[i];
212 u64 end = en->start + en->size;
213 if (end < 1024*1024)
214 break;
215 if (en->type != E820_RAM || end > 0xffffffff)
216 continue;
217 u32 s = en->start, e = end;
218 if (!highram) {
219 u32 newe = ALIGN_DOWN(e - CONFIG_MAX_HIGHTABLE, MALLOC_MIN_ALIGN);
220 if (newe <= e && newe >= s) {
221 highram = newe;
222 e = newe;
223 }
224 }
225 addSpace(&ZoneTmpHigh, (void*)s, (void*)e);
226 }
227
228 // Populate other regions
229 addSpace(&ZoneTmpLow, (void*)BUILD_STACK_ADDR, (void*)BUILD_EBDA_MINIMUM);
230 addSpace(&ZoneFSeg, BiosTableSpace, &BiosTableSpace[CONFIG_MAX_BIOSTABLE]);
231 addSpace(&ZoneLow, (void*)BUILD_LOWRAM_END, (void*)BUILD_LOWRAM_END);
232 if (highram) {
233 addSpace(&ZoneHigh, (void*)highram
234 , (void*)highram + CONFIG_MAX_HIGHTABLE);
235 add_e820(highram, CONFIG_MAX_HIGHTABLE, E820_RESERVED);
236 }
237}
238
239void
240malloc_finalize(void)
241{
242 dprintf(3, "malloc finalize\n");
243
244 // Reserve more low-mem if needed.
245 u32 endlow = GET_BDA(mem_size_kb)*1024;
246 add_e820(endlow, BUILD_LOWRAM_END-endlow, E820_RESERVED);
247
248 // Give back unused high ram.
249 struct allocinfo_s *info = findLast(&ZoneHigh);
250 if (info) {
251 u32 giveback = ALIGN_DOWN(info->allocend - info->dataend, PAGE_SIZE);
252 add_e820((u32)info->dataend, giveback, E820_RAM);
253 dprintf(1, "Returned %d bytes of ZoneHigh\n", giveback);
254 }
255
256 // Clear low-memory allocations.
257 memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
258}
259
260
261/****************************************************************
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400262 * ebda movement
263 ****************************************************************/
264
265// Move ebda
266static int
267relocate_ebda(u32 newebda, u32 oldebda, u8 ebda_size)
268{
269 u32 lowram = GET_BDA(mem_size_kb) * 1024;
270 if (oldebda != lowram)
271 // EBDA isn't at end of ram - give up.
272 return -1;
273
Kevin O'Connor8f59aa32010-06-06 16:11:45 -0400274 // Do copy (this assumes memcpy copies forward - otherwise memmove
275 // is needed)
276 memcpy_fl((void*)newebda, (void*)oldebda, ebda_size * 1024);
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400277
278 // Update indexes
279 dprintf(1, "ebda moved from %x to %x\n", oldebda, newebda);
280 SET_BDA(mem_size_kb, newebda / 1024);
281 SET_BDA(ebda_seg, FLATPTR_TO_SEG(newebda));
282 return 0;
283}
284
285// Support expanding the ZoneLow dynamically.
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400286static void
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400287zonelow_expand(u32 size, u32 align)
288{
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400289 struct allocinfo_s *info = findLast(&ZoneLow);
290 if (!info)
291 return;
292 u32 oldpos = (u32)GET_PMMVAR(info->allocend);
293 u32 newpos = ALIGN_DOWN(oldpos - size, align);
294 u32 bottom = (u32)GET_PMMVAR(info->dataend);
295 if (newpos >= bottom && newpos <= oldpos)
296 // Space already present.
297 return;
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400298 u16 ebda_seg = get_ebda_seg();
299 u32 ebda_pos = (u32)MAKE_FLATPTR(ebda_seg, 0);
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400300 u8 ebda_size = GET_EBDA2(ebda_seg, size);
301 u32 ebda_end = ebda_pos + ebda_size * 1024;
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400302 if (ebda_end != bottom)
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400303 // Something else is after ebda - can't use any existing space.
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400304 newpos = ALIGN_DOWN(ebda_end - size, align);
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400305 u32 newbottom = ALIGN_DOWN(newpos, 1024);
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400306 u32 newebda = ALIGN_DOWN(newbottom - ebda_size * 1024, 1024);
307 if (newebda < BUILD_EBDA_MINIMUM)
308 // Not enough space.
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400309 return;
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400310
311 // Move ebda
312 int ret = relocate_ebda(newebda, ebda_pos, ebda_size);
313 if (ret)
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400314 return;
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400315
316 // Update zone
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400317 if (ebda_end == bottom) {
318 SET_PMMVAR(info->data, (void*)newbottom);
319 SET_PMMVAR(info->dataend, (void*)newbottom);
320 } else
321 addSpace(&ZoneLow, (void*)newbottom, (void*)ebda_end);
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400322}
323
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400324// Check if can expand the given zone to fulfill an allocation
325static void *
326allocExpandSpace(struct zone_s *zone, u32 size, u32 align
327 , struct allocinfo_s *fill)
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400328{
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400329 void *data = allocSpace(zone, size, align, fill);
330 if (data || zone != &ZoneLow)
331 return data;
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400332
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400333 // Make sure to not move ebda while an optionrom is running.
334 if (unlikely(wait_preempt())) {
335 data = allocSpace(zone, size, align, fill);
336 if (data)
337 return data;
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400338 }
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400339
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400340 zonelow_expand(size, align);
341 return allocSpace(zone, size, align, fill);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400342}
343
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400344
345/****************************************************************
Kevin O'Connor8f4409b2009-11-25 18:51:46 -0500346 * tracked memory allocations
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400347 ****************************************************************/
348
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400349// Allocate memory from the given zone and track it as a PMM allocation
Kevin O'Connorf9a774c2010-04-17 16:58:32 -0400350void * __malloc
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400351pmm_malloc(struct zone_s *zone, u32 handle, u32 size, u32 align)
352{
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400353 if (!size)
354 return NULL;
355
356 // Find and reserve space for bookkeeping.
357 struct allocdetail_s *detail = allocSpace(
358 &ZoneTmpHigh, sizeof(*detail), MALLOC_MIN_ALIGN, NULL);
359 if (!detail) {
360 detail = allocSpace(&ZoneTmpLow, sizeof(*detail)
361 , MALLOC_MIN_ALIGN, NULL);
362 if (!detail)
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400363 return NULL;
364 }
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400365
366 // Find and reserve space for main allocation
367 void *data = allocExpandSpace(zone, size, align, &detail->datainfo);
368 if (!data) {
369 freeSpace(&detail->detailinfo);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400370 return NULL;
371 }
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400372
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400373 dprintf(8, "pmm_malloc zone=%p handle=%x size=%d align=%x"
374 " ret=%p (detail=%p)\n"
375 , zone, handle, size, align
376 , data, detail);
377 SET_PMMVAR(detail->handle, handle);
378
379 return data;
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400380}
381
382// Free a data block allocated with pmm_malloc
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400383int
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400384pmm_free(void *data)
385{
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400386 struct allocinfo_s *info = findAlloc(data);
387 if (!info || data == (void*)info || data == GET_PMMVAR(info->dataend))
388 return -1;
389 struct allocdetail_s *detail = container_of(
390 info, struct allocdetail_s, datainfo);
391 dprintf(8, "pmm_free %p (detail=%p)\n", data, detail);
392 freeSpace(info);
393 freeSpace(&detail->detailinfo);
394 return 0;
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400395}
396
397// Find the amount of free space in a given zone.
398static u32
399pmm_getspace(struct zone_s *zone)
400{
Kevin O'Connorf416fe92009-09-24 20:51:55 -0400401 // XXX - doesn't account for ZoneLow being able to grow.
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400402 // XXX - results not reliable when CONFIG_THREAD_OPTIONROMS
403 u32 maxspace = 0;
404 struct allocinfo_s *info;
405 for (info = GET_PMMVAR(zone->info); info; info = GET_PMMVAR(info->next)) {
406 u32 space = GET_PMMVAR(info->allocend) - GET_PMMVAR(info->dataend);
407 if (space > maxspace)
408 maxspace = space;
409 }
410
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400411 if (zone != &ZoneTmpHigh && zone != &ZoneTmpLow)
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400412 return maxspace;
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400413 // Account for space needed for PMM tracking.
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400414 u32 reserve = ALIGN(sizeof(struct allocdetail_s), MALLOC_MIN_ALIGN);
415 if (maxspace <= reserve)
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400416 return 0;
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400417 return maxspace - reserve;
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400418}
419
420// Find the data block allocated with pmm_malloc with a given handle.
421static void *
422pmm_find(u32 handle)
423{
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400424 int i;
425 for (i=0; i<ARRAY_SIZE(Zones); i++) {
426 struct zone_s *zone = GET_PMMVAR(Zones[i]);
427 struct allocinfo_s *info;
428 for (info = GET_PMMVAR(zone->info); info
429 ; info = GET_PMMVAR(info->next)) {
430 if (GET_PMMVAR(info->data) != (void*)info)
431 continue;
432 struct allocdetail_s *detail = container_of(
433 info, struct allocdetail_s, detailinfo);
434 if (GET_PMMVAR(detail->handle) == handle)
435 return GET_PMMVAR(detail->datainfo.data);
436 }
Kevin O'Connor8f4409b2009-11-25 18:51:46 -0500437 }
Kevin O'Connor42a1d4c2010-06-06 11:10:24 -0400438 return NULL;
Kevin O'Connor8f4409b2009-11-25 18:51:46 -0500439}
440
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400441
442/****************************************************************
443 * pmm interface
444 ****************************************************************/
Kevin O'Connore54ee382009-07-26 19:33:13 -0400445
446struct pmmheader {
447 u32 signature;
448 u8 version;
449 u8 length;
450 u8 checksum;
451 u16 entry_offset;
452 u16 entry_seg;
453 u8 reserved[5];
454} PACKED;
455
456extern struct pmmheader PMMHEADER;
457
458#define PMM_SIGNATURE 0x4d4d5024 // $PMM
459
460#if CONFIG_PMM
461struct pmmheader PMMHEADER __aligned(16) VAR16EXPORT = {
462 .version = 0x01,
463 .length = sizeof(PMMHEADER),
464 .entry_seg = SEG_BIOS,
465};
466#endif
467
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400468#define PMM_FUNCTION_NOT_SUPPORTED 0xffffffff
Kevin O'Connore54ee382009-07-26 19:33:13 -0400469
470// PMM - allocate
471static u32
472handle_pmm00(u16 *args)
473{
474 u32 length = *(u32*)&args[1], handle = *(u32*)&args[3];
475 u16 flags = args[5];
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400476 dprintf(3, "pmm00: length=%x handle=%x flags=%x\n"
Kevin O'Connore54ee382009-07-26 19:33:13 -0400477 , length, handle, flags);
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400478 struct zone_s *lowzone = &ZoneTmpLow, *highzone = &ZoneTmpHigh;
479 if (flags & 8) {
480 // Permanent memory request.
481 lowzone = &ZoneLow;
482 highzone = &ZoneHigh;
483 }
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400484 if (!length) {
485 // Memory size request
486 switch (flags & 3) {
487 default:
488 case 0:
489 return 0;
490 case 1:
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400491 return pmm_getspace(lowzone);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400492 case 2:
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400493 return pmm_getspace(highzone);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400494 case 3: {
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400495 u32 spacelow = pmm_getspace(lowzone);
496 u32 spacehigh = pmm_getspace(highzone);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400497 if (spacelow > spacehigh)
498 return spacelow;
499 return spacehigh;
500 }
501 }
502 }
503 u32 size = length * 16;
504 if ((s32)size <= 0)
505 return 0;
506 u32 align = MALLOC_MIN_ALIGN;
507 if (flags & 4) {
508 align = 1<<__ffs(size);
509 if (align < MALLOC_MIN_ALIGN)
510 align = MALLOC_MIN_ALIGN;
511 }
512 switch (flags & 3) {
513 default:
514 case 0:
515 return 0;
516 case 1:
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400517 return (u32)pmm_malloc(lowzone, handle, size, align);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400518 case 2:
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400519 return (u32)pmm_malloc(highzone, handle, size, align);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400520 case 3: {
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400521 void *data = pmm_malloc(lowzone, handle, size, align);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400522 if (data)
523 return (u32)data;
Kevin O'Connor0e9fd612009-08-22 21:31:58 -0400524 return (u32)pmm_malloc(highzone, handle, size, align);
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400525 }
526 }
Kevin O'Connore54ee382009-07-26 19:33:13 -0400527}
528
529// PMM - find
530static u32
531handle_pmm01(u16 *args)
532{
533 u32 handle = *(u32*)&args[1];
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400534 dprintf(3, "pmm01: handle=%x\n", handle);
Kevin O'Connord948e2b2009-10-12 12:54:56 -0400535 if (handle == PMM_DEFAULT_HANDLE)
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400536 return 0;
537 return (u32)pmm_find(handle);
Kevin O'Connore54ee382009-07-26 19:33:13 -0400538}
539
540// PMM - deallocate
541static u32
542handle_pmm02(u16 *args)
543{
544 u32 buffer = *(u32*)&args[1];
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400545 dprintf(3, "pmm02: buffer=%x\n", buffer);
546 int ret = pmm_free((void*)buffer);
547 if (ret)
548 // Error
549 return 1;
Kevin O'Connore54ee382009-07-26 19:33:13 -0400550 return 0;
551}
552
553static u32
554handle_pmmXX(u16 *args)
555{
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400556 return PMM_FUNCTION_NOT_SUPPORTED;
Kevin O'Connore54ee382009-07-26 19:33:13 -0400557}
558
559u32 VISIBLE16
560handle_pmm(u16 *args)
561{
562 if (! CONFIG_PMM)
Kevin O'Connor0bf92702009-08-01 11:45:37 -0400563 return PMM_FUNCTION_NOT_SUPPORTED;
Kevin O'Connore54ee382009-07-26 19:33:13 -0400564
565 u16 arg1 = args[0];
566 dprintf(DEBUG_HDL_pmm, "pmm call arg1=%x\n", arg1);
567
568 switch (arg1) {
569 case 0x00: return handle_pmm00(args);
570 case 0x01: return handle_pmm01(args);
571 case 0x02: return handle_pmm02(args);
572 default: return handle_pmmXX(args);
573 }
574}
575
576// romlayout.S
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500577extern void entry_pmm(void);
Kevin O'Connore54ee382009-07-26 19:33:13 -0400578
579void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500580pmm_setup(void)
Kevin O'Connore54ee382009-07-26 19:33:13 -0400581{
582 if (! CONFIG_PMM)
583 return;
584
585 dprintf(3, "init PMM\n");
586
587 PMMHEADER.signature = PMM_SIGNATURE;
588 PMMHEADER.entry_offset = (u32)entry_pmm - BUILD_BIOS_ADDR;
589 PMMHEADER.checksum -= checksum(&PMMHEADER, sizeof(PMMHEADER));
590}
591
592void
Kevin O'Connor1ca05b02010-01-03 17:43:37 -0500593pmm_finalize(void)
Kevin O'Connore54ee382009-07-26 19:33:13 -0400594{
595 if (! CONFIG_PMM)
596 return;
597
598 dprintf(3, "finalize PMM\n");
599
600 PMMHEADER.signature = 0;
601 PMMHEADER.entry_offset = 0;
Kevin O'Connore54ee382009-07-26 19:33:13 -0400602}