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source: soft/giet_vm/giet_boot/boot.c @ 433

Last change on this file since 433 was 433, checked in by cfuguet, 10 years ago

boot: two modifications in the GietVM bootloader

Verifying that all vsegs sharing a big page have the same flags.

Bugfixes in the _physical_memset() function

File size: 92.7 KB

Line
1	/////////////////////////////////////////////////////////////////////////////////////////
2	// File : boot.c
3	// Date : 01/11/2013
4	// Author : alain greiner
5	// Copyright (c) UPMC-LIP6
6	//////////////////////////////////////////////////////////////////////////////////////////
7	// The boot.c file is part of the GIET-VM nano-kernel.
8	//
9	// This nano-kernel has been written for the MIPS32 processor.
10	// The virtual adresses are on 32 bits and use the (unsigned int) type. The
11	// physicals addresses can have up to 40 bits, and use the (unsigned long long) type.
12	// It natively supports clusterised shared memory multi-processors architectures,
13	// where each processor is identified by a composite index (cluster_xy, local_id),
14	// and where there is one physical memory bank per cluster.
15	//
16	// This code, executed in the boot phase by proc[0,0,0], performs the following tasks:
17	// - load into memory various binary files, from a FAT32 file system,
18	// - build the various page tables (one page table per vspace)
19	// - initialize the shedulers (one scheduler per processor)
20	//
21	// 1) The binary files to be loaded are:
22	// - the "map.bin" file contains the hardware architecture description and the
23	// mapping directives. It must be stored in the the seg_boot_mapping segment
24	// (at address SEG_BOOT_MAPPING_BASE defined in hard_config.h file).
25	// - the "sys.elf" file contains the kernel binary code and data.
26	// - the various "application.elf" files.
27	//
28	// 2) The map.bin file contains the binary representation of the map.xml file defining:
29	// - the hardware architecture: number of clusters, number or processors,
30	// size of the memory segments, and peripherals in each cluster.
31	// - The structure of the various multi-threaded software applications:
32	// number of tasks, communication channels.
33	// - The mapping: grouping of virtual objects (vobj) in the virtual segments (vseg),
34	// placement of virtual segments (vseg) in the physical segments (pseg), placement
35	// of software tasks on the processors,
36	//
37	// 3) The GIET-VM uses the paged virtual memory to provides two services:
38	// - classical memory protection, when several independant applications compiled
39	// in different virtual spaces are executing on the same hardware platform.
40	// - data placement in NUMA architectures, to control the placement
41	// of the software objects (vsegs) on the physical memory banks (psegs).
42	//
43	// The max number of vspaces (GIET_NB_VSPACE_MAX) is a configuration parameter.
44	// The page table are statically build in the boot phase, and they do not
45	// change during execution.
46	// The GIET_VM uses both small pages (4 Kbytes), and big pages (2 Mbytes).
47	//
48	// Each page table (one page table per virtual space) is monolithic, and contains
49	// one PT1 (8 Kbytes) and a variable number of PT2s (4 Kbytes each). For each vspace,
50	// the numberof PT2s is defined by the size of the PTAB vobj in the mapping.
51	// The PT1 is indexed by the ix1 field (11 bits) of the VPN. Each entry is 32 bits.
52	// A PT2 is indexed the ix2 field (9 bits) of the VPN. Each entry is a double word.
53	// The first word contains the flags, the second word contains the PPN.
54	//
55	// The page tables can be distributed in all clusters.
56	///////////////////////////////////////////////////////////////////////////////////////
57	// Implementation Notes:
58	//
59	// 1) The cluster_id variable is a linear index in the mapping_info array of clusters.
60	// We use the cluster_xy variable for the tological index = x << Y_WIDTH + y
61	//
62	///////////////////////////////////////////////////////////////////////////////////////
63
64	#include <giet_config.h>
65	#include <mwmr_channel.h>
66	#include <barrier.h>
67	#include <memspace.h>
68	#include <tty_driver.h>
69	#include <xcu_driver.h>
70	#include <bdv_driver.h>
71	#include <dma_driver.h>
72	#include <cma_driver.h>
73	#include <nic_driver.h>
74	#include <ioc_driver.h>
75	#include <iob_driver.h>
76	#include <pic_driver.h>
77	#include <mwr_driver.h>
78	#include <ctx_handler.h>
79	#include <irq_handler.h>
80	#include <vmem.h>
81	#include <pmem.h>
82	#include <utils.h>
83	#include <elf-types.h>
84
85	// for boot FAT initialisation
86	#include <fat32.h>
87
88	#include <mips32_registers.h>
89	#include <stdarg.h>
90
91	#if !defined(X_SIZE)
92	# error: The X_SIZE value must be defined in the 'hard_config.h' file !
93	#endif
94
95	#if !defined(Y_SIZE)
96	# error: The Y_SIZE value must be defined in the 'hard_config.h' file !
97	#endif
98
99	#if !defined(X_WIDTH)
100	# error: The X_WIDTH value must be defined in the 'hard_config.h' file !
101	#endif
102
103	#if !defined(Y_WIDTH)
104	# error: The Y_WIDTH value must be defined in the 'hard_config.h' file !
105	#endif
106
107	#if !defined(SEG_BOOT_MAPPING_BASE)
108	# error: The SEG_BOOT_MAPPING_BASE value must be defined in the hard_config.h file !
109	#endif
110
111	#if !defined(NB_PROCS_MAX)
112	# error: The NB_PROCS_MAX value must be defined in the 'hard_config.h' file !
113	#endif
114
115	#if !defined(GIET_NB_VSPACE_MAX)
116	# error: The GIET_NB_VSPACE_MAX value must be defined in the 'giet_config.h' file !
117	#endif
118
119	#if !defined(GIET_ELF_BUFFER_SIZE)
120	# error: The GIET_ELF_BUFFER_SIZE value must be defined in the giet_config.h file !
121	#endif
122
123	////////////////////////////////////////////////////////////////////////////
124	// Global variables for boot code
125	////////////////////////////////////////////////////////////////////////////
126
127	extern void boot_entry();
128
129	// FAT internal representation for boot code
130	__attribute__((section (".bootdata")))
131	fat32_fs_t fat __attribute__((aligned(512)));
132
133	// Temporaty buffer used to load one complete .elf file
134	__attribute__((section (".bootdata")))
135	char boot_elf_buffer[GIET_ELF_BUFFER_SIZE] __attribute__((aligned(512)));
136
137	// Physical memory allocators array (one per cluster)
138	__attribute__((section (".bootdata")))
139	pmem_alloc_t boot_pmem_alloc[X_SIZE][Y_SIZE];
140
141	// Schedulers virtual base addresses array (one per processor)
142	__attribute__((section (".bootdata")))
143	static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX];
144
145	// Page tables virtual base addresses array (one per vspace)
146	__attribute__((section (".bootdata")))
147	unsigned int _ptabs_vaddr[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
148
149	// Page tables physical base addresses (one per vspace and per cluster)
150	__attribute__((section (".bootdata")))
151	paddr_t _ptabs_paddr[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
152
153	// Page tables pt2 allocators (one per vspace and per cluster)
154	__attribute__((section (".bootdata")))
155	unsigned int _ptabs_next_pt2[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
156
157	// Page tables max_pt2 (same value for all page tables)
158	__attribute__((section (".bootdata")))
159	unsigned int _ptabs_max_pt2;
160
161	/////////////////////////////////////////////////////////////////////
162	// This function checks consistence beween the mapping_info data
163	// structure (soft), and the giet_config file (hard).
164	/////////////////////////////////////////////////////////////////////
165	void boot_mapping_check()
166	{
167	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
168
169	// checking mapping availability
170	if (header->signature != IN_MAPPING_SIGNATURE)
171	{
172	_puts("\n[BOOT ERROR] Illegal mapping signature: ");
173	_putx(header->signature);
174	_puts("\n");
175	_exit();
176	}
177
178	// checking number of clusters
179	if ( (header->x_size != X_SIZE) \|\|
180	(header->y_size != Y_SIZE) \|\|
181	(header->x_width != X_WIDTH) \|\|
182	(header->y_width != Y_WIDTH) )
183	{
184	_puts("\n[BOOT ERROR] Incoherent X_SIZE or Y_SIZE ");
185	_puts("\n - In hard_config: X_SIZE = ");
186	_putd( X_SIZE );
187	_puts(" / Y_SIZE = ");
188	_putd( Y_SIZE );
189	_puts(" / X_WIDTH = ");
190	_putd( X_WIDTH );
191	_puts(" / Y_WIDTH = ");
192	_putd( Y_WIDTH );
193	_puts("\n - In mapping_info: x_size = ");
194	_putd( header->x_size );
195	_puts(" / y_size = ");
196	_putd( header->y_size );
197	_puts(" / x_width = ");
198	_putd( header->x_width );
199	_puts(" / y_width = ");
200	_putd( header->y_width );
201	_puts("\n");
202	_exit();
203	}
204	// checking number of virtual spaces
205	if (header->vspaces > GIET_NB_VSPACE_MAX)
206	{
207	_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n");
208	_puts("\n");
209	_exit();
210	}
211
212	#if BOOT_DEBUG_MAPPING
213	_puts("\n - x_size = ");
214	_putd( header->x_size );
215	_puts("\n - y_size = ");
216	_putd( header->y_size );
217	_puts("\n - procs = ");
218	_putd( header->procs );
219	_puts("\n - periphs = ");
220	_putd( header->periphs );
221	_puts("\n - vspaces = ");
222	_putd( header->vspaces );
223	_puts("\n - tasks = ");
224	_putd( header->tasks );
225	_puts("\n");
226	_puts("\n - size of header = ");
227	_putd( MAPPING_HEADER_SIZE );
228	_puts("\n - size of cluster = ");
229	_putd( MAPPING_CLUSTER_SIZE );
230	_puts("\n - size of pseg = ");
231	_putd( MAPPING_PSEG_SIZE );
232	_puts("\n - size of proc = ");
233	_putd( MAPPING_PROC_SIZE );
234	_puts("\n - size of vspace = ");
235	_putd( MAPPING_VSPACE_SIZE );
236	_puts("\n - size of vseg = ");
237	_putd( MAPPING_VSEG_SIZE );
238	_puts("\n - size of vobj = ");
239	_putd( MAPPING_VOBJ_SIZE );
240	_puts("\n - size of task = ");
241	_putd( MAPPING_TASK_SIZE );
242	_puts("\n");
243
244	unsigned int cluster_id;
245	mapping_cluster_t * cluster = _get_cluster_base(header);
246	for( cluster_id = 0; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
247	{
248	_puts("\n - cluster[");
249	_putd( cluster[cluster_id].x );
250	_puts(",");
251	_putd( cluster[cluster_id].y );
252	_puts("]\n procs = ");
253	_putd( cluster[cluster_id].procs );
254	_puts("\n psegs = ");
255	_putd( cluster[cluster_id].psegs );
256	_puts("\n periphs = ");
257	_putd( cluster[cluster_id].periphs );
258	_puts("\n");
259	}
260	#endif
261
262	} // end boot_mapping_check()
263
264	//////////////////////////////////////////////////////////////////////////////
265	// This function registers a new PTE1 in the page table defined
266	// by the vspace_id argument, and the (x,y) coordinates.
267	// It updates only the first level PT1.
268	//////////////////////////////////////////////////////////////////////////////
269	void boot_add_pte1( unsigned int vspace_id,
270	unsigned int x,
271	unsigned int y,
272	unsigned int vpn, // 20 bits right-justified
273	unsigned int flags, // 10 bits left-justified
274	unsigned int ppn ) // 28 bits right-justified
275	{
276
277	#if (BOOT_DEBUG_PT > 1)
278	_puts(" - PTE1 in PTAB[");
279	_putd( vspace_id );
280	_puts(",");
281	_putd( x );
282	_puts(",");
283	_putd( y );
284	_puts("] : vpn = ");
285	_putx( vpn );
286	#endif
287
288	// compute index in PT1
289	unsigned int ix1 = vpn >> 9; // 11 bits for ix1
290
291	// get page table physical base address
292	paddr_t pt1_pbase = _ptabs_paddr[vspace_id][x][y];
293
294	// check pt1_base
295	if ( pt1_pbase == 0 )
296	{
297	_puts("\n[BOOT ERROR] in boot_add_pte1() : illegal pbase address for PTAB[");
298	_putd( vspace_id );
299	_puts(",");
300	_putd( x );
301	_puts(",");
302	_putd( y );
303	_puts("]\n");
304	_exit();
305	}
306
307	// compute pte1 : 2 bits V T / 8 bits flags / 3 bits RSVD / 19 bits bppi
308	unsigned int pte1 = PTE_V \|
309	(flags & 0x3FC00000) \|
310	((ppn>>9) & 0x0007FFFF);
311
312	// write pte1 in PT1
313	_physical_write( pt1_pbase + 4*ix1, pte1 );
314
315	#if (BOOT_DEBUG_PT > 1)
316	_puts(" / ppn = ");
317	_putx( ppn );
318	_puts(" / flags = ");
319	_putx( flags );
320	_puts("\n");
321	#endif
322
323	} // end boot_add_pte1()
324
325	//////////////////////////////////////////////////////////////////////////////
326	// This function registers a new PTE2 in the page table defined
327	// by the vspace_id argument, and the (x,y) coordinates.
328	// It updates both the first level PT1 and the second level PT2.
329	// As the set of PT2s is implemented as a fixed size array (no dynamic
330	// allocation), this function checks a possible overflow of the PT2 array.
331	//////////////////////////////////////////////////////////////////////////////
332	void boot_add_pte2( unsigned int vspace_id,
333	unsigned int x,
334	unsigned int y,
335	unsigned int vpn, // 20 bits right-justified
336	unsigned int flags, // 10 bits left-justified
337	unsigned int ppn ) // 28 bits right-justified
338	{
339
340	#if (BOOT_DEBUG_PT > 1)
341	_puts(" - PTE2 in PTAB[");
342	_putd( vspace_id );
343	_puts(",");
344	_putd( x );
345	_puts(",");
346	_putd( y );
347	_puts("] : vpn = ");
348	_putx( vpn );
349	#endif
350
351	unsigned int ix1;
352	unsigned int ix2;
353	paddr_t pt2_pbase; // PT2 physical base address
354	paddr_t pte2_paddr; // PTE2 physical address
355	unsigned int pt2_id; // PT2 index
356	unsigned int ptd; // PTD : entry in PT1
357
358	ix1 = vpn >> 9; // 11 bits for ix1
359	ix2 = vpn & 0x1FF; // 9 bits for ix2
360
361	// get page table physical base address and size
362	paddr_t pt1_pbase = _ptabs_paddr[vspace_id][x][y];
363
364	// check pt1_base
365	if ( pt1_pbase == 0 )
366	{
367	_puts("\n[BOOT ERROR] in boot_add_pte2() : PTAB[");
368	_putd( vspace_id );
369	_puts(",");
370	_putd( x );
371	_puts(",");
372	_putd( y );
373	_puts("] undefined\n");
374	_exit();
375	}
376
377	// get ptd in PT1
378	ptd = _physical_read(pt1_pbase + 4 * ix1);
379
380	if ((ptd & PTE_V) == 0) // undefined PTD: compute PT2 base address,
381	// and set a new PTD in PT1
382	{
383	pt2_id = _ptabs_next_pt2[vspace_id][x][y];
384	if (pt2_id == _ptabs_max_pt2)
385	{
386	_puts("\n[BOOT ERROR] in boot_add_pte2() : PTAB[");
387	_putd( vspace_id );
388	_puts(",");
389	_putd( x );
390	_puts(",");
391	_putd( y );
392	_puts("] contains not enough PT2s\n");
393	_exit();
394	}
395
396	pt2_pbase = pt1_pbase + PT1_SIZE + PT2_SIZE * pt2_id;
397	ptd = PTE_V \| PTE_T \| (unsigned int) (pt2_pbase >> 12);
398	_physical_write( pt1_pbase + 4*ix1, ptd);
399	_ptabs_next_pt2[vspace_id][x][y] = pt2_id + 1;
400	}
401	else // valid PTD: compute PT2 base address
402	{
403	pt2_pbase = ((paddr_t)(ptd & 0x0FFFFFFF)) << 12;
404	}
405
406	// set PTE in PT2 : flags & PPN in two 32 bits words
407	pte2_paddr = pt2_pbase + 8 * ix2;
408	_physical_write(pte2_paddr , (PTE_V \|flags) );
409	_physical_write(pte2_paddr + 4 , ppn);
410
411	#if (BOOT_DEBUG_PT > 1)
412	_puts(" / ppn = ");
413	_putx( ppn );
414	_puts(" / flags = ");
415	_putx( flags );
416	_puts("\n");
417	#endif
418
419	} // end boot_add_pte2()
420
421	////////////////////////////////////////////////////////////////////////////////////
422	// Align the value of paddr or vaddr to the required alignement,
423	// defined by alignPow2 == L2(alignement).
424	////////////////////////////////////////////////////////////////////////////////////
425	paddr_t paddr_align_to(paddr_t paddr, unsigned int alignPow2)
426	{
427	paddr_t mask = (1 << alignPow2) - 1;
428	return ((paddr + mask) & ~mask);
429	}
430
431	unsigned int vaddr_align_to(unsigned int vaddr, unsigned int alignPow2)
432	{
433	unsigned int mask = (1 << alignPow2) - 1;
434	return ((vaddr + mask) & ~mask);
435	}
436
437	/////////////////////////////////////////////////////////////////////////////////////
438	// This function map a vseg identified by the vseg pointer.
439	//
440	// A given vseg can be mapped in Big Physical Pages (BPP: 2 Mbytes) or in a
441	// Small Physical Pages (SPP: 4 Kbytes), depending on the "big" attribute of vseg,
442	// with the following rules:
443	// - SPP : There is only one vseg in a small physical page, but a single vseg
444	// can cover several contiguous small physical pages.
445	// - BPP : It can exist several vsegs in a single big physical page, and a single
446	// vseg can cover several contiguous big physical pages.
447	//
448	// 1) First step: it computes the vseg length, and register it in vseg->length field.
449	// It computes - for each vobj - the actual vbase address, taking into
450	// account the alignment constraints and register it in vobj->vbase field.
451	//
452	// 2) Second step: it allocates the required number of physical pages,
453	// computes the physical base address (if the vseg is not identity mapping),
454	// and register it in the vseg pbase field.
455	// Only the 4 vsegs used by the boot code and the peripheral vsegs
456	// can be identity mapping: The first big physical page in cluster[0,0]
457	// is reserved for the 4 boot vsegs.
458	//
459	// 3) Third step (only for vseg that have the VOBJ_TYPE_PTAB): all page tables
460	// associated to the various vspaces must be packed in the same vseg.
461	// We divide the vseg in M sub-segments, and compute the vbase and pbase
462	// addresses for each page table, and register it in the _ptabs_paddr
463	// and _ptabs_vaddr arrays.
464	//
465	/////////////////////////////////////////////////////////////////////////////////////
466	void boot_vseg_map( mapping_vseg_t* vseg,
467	unsigned int vspace_id )
468	{
469	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
470	mapping_vobj_t* vobj = _get_vobj_base(header);
471	mapping_cluster_t* cluster = _get_cluster_base(header);
472	mapping_pseg_t* pseg = _get_pseg_base(header);
473
474	// compute destination cluster pointer & coordinates
475	pseg = pseg + vseg->psegid;
476	cluster = cluster + pseg->clusterid;
477	unsigned int x_dest = cluster->x;
478	unsigned int y_dest = cluster->y;
479
480	// compute the first vobj global index
481	unsigned int vobj_id = vseg->vobj_offset;
482
483	// compute the "big" vseg attribute
484	unsigned int big = vseg->big;
485
486	// compute the "is_ram" vseg attribute
487	unsigned int is_ram;
488	if ( pseg->type == PSEG_TYPE_RAM ) is_ram = 1;
489	else is_ram = 0;
490
491	// compute the "is_ptab" attribute
492	unsigned int is_ptab;
493	if ( vobj[vobj_id].type == VOBJ_TYPE_PTAB ) is_ptab = 1;
494	else is_ptab = 0;
495
496	// compute actual vspace index
497	unsigned int vsid;
498	if ( vspace_id == 0xFFFFFFFF ) vsid = 0;
499	else vsid = vspace_id;
500
501	//////////// First step : compute vseg length and vobj(s) vbase
502
503	unsigned int vobj_vbase = vseg->vbase; // min vbase for first vobj
504
505	for ( vobj_id = vseg->vobj_offset ;
506	vobj_id < (vseg->vobj_offset + vseg->vobjs) ;
507	vobj_id++ )
508	{
509	// compute and register vobj vbase
510	vobj[vobj_id].vbase = vaddr_align_to( vobj_vbase, vobj[vobj_id].align );
511
512	// compute min vbase for next vobj
513	vobj_vbase = vobj[vobj_id].vbase + vobj[vobj_id].length;
514	}
515
516	// compute and register vseg length (multiple of 4 Kbytes)
517	vseg->length = vaddr_align_to( vobj_vbase - vseg->vbase, 12 );
518
519	//////////// Second step : compute ppn and npages
520	//////////// - if identity mapping : ppn <= vpn
521	//////////// - if vseg is periph : ppn <= pseg.base >> 12
522	//////////// - if vseg is ram : ppn <= physical memory allocator
523
524	unsigned int ppn; // first physical page index ( 28 bits = \|x\|y\|bppi\|sppi\| )
525	unsigned int vpn; // first virtual page index ( 20 bits = \|ix1\|ix2\| )
526	unsigned int vpn_max; // last virtual page index ( 20 bits = \|ix1\|ix2\| )
527
528	vpn = vseg->vbase >> 12;
529	vpn_max = (vseg->vbase + vseg->length - 1) >> 12;
530
531	// compute npages
532	unsigned int npages; // number of required (big or small) pages
533	if ( big == 0 ) npages = vpn_max - vpn + 1; // number of small pages
534	else npages = (vpn_max>>9) - (vpn>>9) + 1; // number of big pages
535
536	// compute ppn
537	if ( vseg->ident ) // identity mapping
538	{
539	ppn = vpn;
540	}
541	else // not identity mapping
542	{
543	if ( is_ram ) // RAM : physical memory allocation required
544	{
545	// compute pointer on physical memory allocator in dest cluster
546	pmem_alloc_t* palloc = &boot_pmem_alloc[x_dest][y_dest];
547
548	if ( big == 0 ) // SPP : small physical pages
549	{
550	// allocate contiguous small physical pages
551	ppn = _get_small_ppn( palloc, npages );
552	}
553	else // BPP : big physical pages
554	{
555
556	// one big page can be shared by several vsegs
557	// we must chek if BPP already allocated
558	if ( is_ptab ) // It cannot be mapped
559	{
560	ppn = _get_big_ppn( palloc, npages );
561	}
562	else // It can be mapped
563	{
564	unsigned int ix1 = vpn >> 9; // 11 bits
565	paddr_t paddr = _ptabs_paddr[vsid][x_dest][y_dest] + (ix1<<2);
566	unsigned int pte1 = _physical_read( paddr );
567	if ( (pte1 & PTE_V) == 0 ) // BPP not allocated yet
568	{
569	// allocate contiguous big physical pages
570	ppn = _get_big_ppn( palloc, npages );
571	}
572	else // BPP already allocated
573	{
574	// test if new vseg has the same mode bits than
575	// the other vsegs in the same big page
576	unsigned int pte1_mode = 0;
577	if (pte1 & PTE_C) pte1_mode \|= C_MODE_MASK;
578	if (pte1 & PTE_X) pte1_mode \|= X_MODE_MASK;
579	if (pte1 & PTE_W) pte1_mode \|= W_MODE_MASK;
580	if (pte1 & PTE_U) pte1_mode \|= U_MODE_MASK;
581	if (vseg->mode != pte1_mode) {
582	_puts("\n[BOOT ERROR] in boot_vseg_map() : vseg ");
583	_puts( vseg->name );
584	_puts(" has different flags (");
585	_putx( vseg->mode );
586	_puts(") than other vsegs sharing the same big page (");
587	_putx( pte1_mode );
588	_puts(")");
589	_exit();
590	}
591
592	ppn = ((pte1 << 9) & 0x0FFFFE00);
593	}
594	}
595	ppn = ppn \| (vpn & 0x1FF);
596	}
597	}
598	else // PERI : no memory allocation required
599	{
600	ppn = pseg->base >> 12;
601	}
602	}
603
604	// update vseg.pbase field and update vsegs chaining
605	vseg->pbase = ((paddr_t)ppn) << 12;
606	vseg->next_vseg = pseg->next_vseg;
607	pseg->next_vseg = (unsigned int)vseg;
608
609
610	//////////// Third step : (only if the vseg is a page table)
611	//////////// - compute the physical & virtual base address for each vspace
612	//////////// by dividing the vseg in several sub-segments.
613	//////////// - register it in _ptabs_vaddr & _ptabs_paddr arrays,
614	//////////// and initialize next_pt2 allocators.
615	//////////// - reset all entries in first level page tables
616
617	if ( is_ptab )
618	{
619	unsigned int vs; // vspace index
620	unsigned int nspaces; // number of vspaces
621	unsigned int nsp; // number of small pages for one PTAB
622	unsigned int offset; // address offset for current PTAB
623
624	nspaces = header->vspaces;
625	offset = 0;
626
627	// each PTAB must be aligned on a 8 Kbytes boundary
628	nsp = ( vseg->length >> 12 ) / nspaces;
629	if ( (nsp & 0x1) == 0x1 ) nsp = nsp - 1;
630
631	// compute max_pt2
632	_ptabs_max_pt2 = ((nsp<<12) - PT1_SIZE) / PT2_SIZE;
633
634	for ( vs = 0 ; vs < nspaces ; vs++ )
635	{
636	_ptabs_vaddr [vs][x_dest][y_dest] = (vpn + offset) << 12;
637	_ptabs_paddr [vs][x_dest][y_dest] = ((paddr_t)(ppn + offset)) << 12;
638	_ptabs_next_pt2[vs][x_dest][y_dest] = 0;
639	offset += nsp;
640
641	// reset all entries in PT1 (8 Kbytes)
642	_physical_memset( _ptabs_paddr[vs][x_dest][y_dest], PT1_SIZE, 0 );
643	}
644	}
645
646	#if BOOT_DEBUG_PT
647	_puts("[BOOT DEBUG] ");
648	_puts( vseg->name );
649	_puts(" in cluster[");
650	_putd( x_dest );
651	_puts(",");
652	_putd( y_dest );
653	_puts("] : vbase = ");
654	_putx( vseg->vbase );
655	_puts(" / length = ");
656	_putx( vseg->length );
657	if ( big ) _puts(" / BIG / npages = ");
658	else _puts(" / SMALL / npages = ");
659	_putd( npages );
660	_puts(" / pbase = ");
661	_putl( vseg->pbase );
662	_puts("\n");
663	#endif
664
665	} // end boot_vseg_map()
666
667	/////////////////////////////////////////////////////////////////////////////////////
668	// For the vseg defined by the vseg pointer, this function register all PTEs
669	// in one or several page tables.
670	// It is a global vseg (system vseg) if (vspace_id == 0xFFFFFFFF).
671	// The number of involved PTABs depends on the "local" and "global" attributes:
672	// - PTEs are replicated in all vspaces for a global vseg.
673	// - PTEs are replicated in all clusters for a non local vseg.
674	/////////////////////////////////////////////////////////////////////////////////////
675	void boot_vseg_pte( mapping_vseg_t* vseg,
676	unsigned int vspace_id )
677	{
678	// compute the "global" vseg attribute and actual vspace index
679	unsigned int global;
680	unsigned int vsid;
681	if ( vspace_id == 0xFFFFFFFF )
682	{
683	global = 1;
684	vsid = 0;
685	}
686	else
687	{
688	global = 0;
689	vsid = vspace_id;
690	}
691
692	// compute the "local" and "big" attributes
693	unsigned int local = vseg->local;
694	unsigned int big = vseg->big;
695
696	// compute vseg flags
697	// The three flags (Local, Remote and Dirty) are set to 1 to reduce
698	// latency of TLB miss (L/R) and write (D): Avoid hardware update
699	// mechanism for these flags because GIET_VM does use these flags.
700	unsigned int flags = 0;
701	if (vseg->mode & C_MODE_MASK) flags \|= PTE_C;
702	if (vseg->mode & X_MODE_MASK) flags \|= PTE_X;
703	if (vseg->mode & W_MODE_MASK) flags \|= PTE_W;
704	if (vseg->mode & U_MODE_MASK) flags \|= PTE_U;
705	if ( global ) flags \|= PTE_G;
706	flags \|= PTE_L;
707	flags \|= PTE_R;
708	flags \|= PTE_D;
709
710	// compute VPN, PPN and number of pages (big or small)
711	unsigned int vpn = vseg->vbase >> 12;
712	unsigned int vpn_max = (vseg->vbase + vseg->length - 1) >> 12;
713	unsigned int ppn = (unsigned int)(vseg->pbase >> 12);
714	unsigned int npages;
715	if ( big == 0 ) npages = vpn_max - vpn + 1;
716	else npages = (vpn_max>>9) - (vpn>>9) + 1;
717
718	// compute destination cluster coordinates
719	unsigned int x_dest;
720	unsigned int y_dest;
721	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
722	mapping_cluster_t* cluster = _get_cluster_base(header);
723	mapping_pseg_t* pseg = _get_pseg_base(header);
724	pseg = pseg + vseg->psegid;
725	cluster = cluster + pseg->clusterid;
726	x_dest = cluster->x;
727	y_dest = cluster->y;
728
729	unsigned int p; // iterator for physical page index
730	unsigned int x; // iterator for cluster x coordinate
731	unsigned int y; // iterator for cluster y coordinate
732	unsigned int v; // iterator for vspace index
733
734	// loop on PTEs
735	for ( p = 0 ; p < npages ; p++ )
736	{
737	if ( (local != 0) && (global == 0) ) // one cluster / one vspace
738	{
739	if ( big ) // big pages => PTE1s
740	{
741	boot_add_pte1( vsid,
742	x_dest,
743	y_dest,
744	vpn + (p<<9),
745	flags,
746	ppn + (p<<9) );
747	}
748	else // small pages => PTE2s
749	{
750	boot_add_pte2( vsid,
751	x_dest,
752	y_dest,
753	vpn + p,
754	flags,
755	ppn + p );
756	}
757	}
758	else if ( (local == 0) && (global == 0) ) // all clusters / one vspace
759	{
760	for ( x = 0 ; x < X_SIZE ; x++ )
761	{
762	for ( y = 0 ; y < Y_SIZE ; y++ )
763	{
764	if ( big ) // big pages => PTE1s
765	{
766	boot_add_pte1( vsid,
767	x,
768	y,
769	vpn + (p<<9),
770	flags,
771	ppn + (p<<9) );
772	}
773	else // small pages => PTE2s
774	{
775	boot_add_pte2( vsid,
776	x,
777	y,
778	vpn + p,
779	flags,
780	ppn + p );
781	}
782	}
783	}
784	}
785	else if ( (local != 0) && (global != 0) ) // one cluster / all vspaces
786	{
787	for ( v = 0 ; v < header->vspaces ; v++ )
788	{
789	if ( big ) // big pages => PTE1s
790	{
791	boot_add_pte1( v,
792	x_dest,
793	y_dest,
794	vpn + (p<<9),
795	flags,
796	ppn + (p<<9) );
797	}
798	else // small pages = PTE2s
799	{
800	boot_add_pte2( v,
801	x_dest,
802	y_dest,
803	vpn + p,
804	flags,
805	ppn + p );
806	}
807	}
808	}
809	else if ( (local == 0) && (global != 0) ) // all clusters / all vspaces
810	{
811	for ( x = 0 ; x < X_SIZE ; x++ )
812	{
813	for ( y = 0 ; y < Y_SIZE ; y++ )
814	{
815	for ( v = 0 ; v < header->vspaces ; v++ )
816	{
817	if ( big ) // big pages => PTE1s
818	{
819	boot_add_pte1( v,
820	x,
821	y,
822	vpn + (p<<9),
823	flags,
824	ppn + (p<<9) );
825	}
826	else // small pages -> PTE2s
827	{
828	boot_add_pte2( v,
829	x,
830	y,
831	vpn + p,
832	flags,
833	ppn + p );
834	}
835	}
836	}
837	}
838	}
839	} // end for pages
840	} // end boot_vseg_pte()
841
842	///////////////////////////////////////////////////////////////////////////////
843	// This function initialises the page tables for all vspaces defined
844	// in the mapping_info data structure.
845	// For each vspace, there is one page table per cluster.
846	// In each cluster all page tables for the different vspaces must be
847	// packed in one vseg occupying one single BPP (Big Physical Page).
848	//
849	// For each vseg, the mapping is done in two steps:
850	//
851	// A) mapping : the boot_vseg_map() function allocates contiguous BPPs
852	// or SPPs (if the vseg is not associated to a peripheral), and register
853	// the physical base address in the vseg pbase field. It initialises the
854	// _ptabs_vaddr and _ptabs_paddr arrays if the vseg is a PTAB.
855	//
856	// B) page table initialisation : the boot_vseg_pte() function initialise
857	// the PTEs (both PTE1 and PTE2) in one or several page tables:
858	// - PTEs are replicated in all vspaces for a global vseg.
859	// - PTEs are replicated in all clusters for a non local vseg.
860	//
861	// We must handle vsegs in the following order
862	// 1) all global vsegs containing a page table,
863	// 2) all global vsegs occupying more than one BPP,
864	// 3) all others global vsegs
865	// 4) all private vsegs in user space.
866	///////////////////////////////////////////////////////////////////////////////
867	void _ptabs_init()
868	{
869	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
870	mapping_vspace_t* vspace = _get_vspace_base(header);
871	mapping_vseg_t* vseg = _get_vseg_base(header);
872	mapping_vobj_t* vobj = _get_vobj_base(header);
873
874	unsigned int vspace_id;
875	unsigned int vseg_id;
876
877	if (header->vspaces == 0 )
878	{
879	_puts("\n[BOOT ERROR] in _ptabs_init() : mapping ");
880	_puts( header->name );
881	_puts(" contains no vspace\n");
882	_exit();
883	}
884
885	///////// Phase 1 : global vsegs containing a PTAB (two loops required)
886
887	#if BOOT_DEBUG_PT
888	_puts("\n[BOOT DEBUG] map PTAB global vsegs\n");
889	#endif
890
891	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
892	{
893	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
894	if ( (vobj[vobj_id].type == VOBJ_TYPE_PTAB) )
895	{
896	boot_vseg_map( &vseg[vseg_id], 0xFFFFFFFF );
897	vseg[vseg_id].mapped = 1;
898	}
899	}
900
901	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
902	{
903	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
904	if ( (vobj[vobj_id].type == VOBJ_TYPE_PTAB) )
905	{
906	boot_vseg_pte( &vseg[vseg_id], 0xFFFFFFFF );
907	vseg[vseg_id].mapped = 1;
908	}
909	}
910
911	///////// Phase 2 : global vsegs occupying more than one BPP (one loop)
912
913	#if BOOT_DEBUG_PT
914	_puts("\n[BOOT DEBUG] map all multi-BPP global vsegs\n");
915	#endif
916
917	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
918	{
919	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
920	if ( (vobj[vobj_id].length > 0x200000) &&
921	(vseg[vseg_id].mapped == 0) )
922	{
923	boot_vseg_map( &vseg[vseg_id], 0xFFFFFFFF );
924	vseg[vseg_id].mapped = 1;
925	boot_vseg_pte( &vseg[vseg_id], 0xFFFFFFFF );
926	}
927	}
928
929	///////// Phase 3 : all others global vsegs (one loop)
930
931	#if BOOT_DEBUG_PT
932	_puts("\n[BOOT DEBUG] map all others global vsegs\n");
933	#endif
934
935	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
936	{
937	if ( vseg[vseg_id].mapped == 0 )
938	{
939	boot_vseg_map( &vseg[vseg_id], 0xFFFFFFFF );
940	vseg[vseg_id].mapped = 1;
941	boot_vseg_pte( &vseg[vseg_id], 0xFFFFFFFF );
942	}
943	}
944
945	///////// Phase 4 : all private vsegs (two nested loops)
946
947	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
948	{
949
950	#if BOOT_DEBUG_PT
951	_puts("\n[BOOT DEBUG] map private vsegs for vspace ");
952	_puts( vspace[vspace_id].name );
953	_puts("\n");
954	#endif
955
956	for (vseg_id = vspace[vspace_id].vseg_offset;
957	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
958	vseg_id++)
959	{
960	boot_vseg_map( &vseg[vseg_id], vspace_id );
961	vseg[vseg_id].mapped = 1;
962	boot_vseg_pte( &vseg[vseg_id], vspace_id );
963	}
964	}
965
966	#if (BOOT_DEBUG_PT > 1)
967	mapping_vseg_t* curr;
968	mapping_pseg_t* pseg = _get_pseg_base(header);
969	mapping_cluster_t* cluster = _get_cluster_base(header);
970	unsigned int pseg_id;
971	for( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ )
972	{
973	unsigned int cluster_id = pseg[pseg_id].clusterid;
974	_puts("\n[BOOT DEBUG] vsegs mapped on pseg ");
975	_puts( pseg[pseg_id].name );
976	_puts(" in cluster[");
977	_putd( cluster[cluster_id].x );
978	_puts(",");
979	_putd( cluster[cluster_id].y );
980	_puts("]\n");
981	for( curr = (mapping_vseg_t*)pseg[pseg_id].next_vseg ;
982	curr != 0 ;
983	curr = (mapping_vseg_t*)curr->next_vseg )
984	{
985	_puts(" - vseg ");
986	_puts( curr->name );
987	_puts(" : len = ");
988	_putx( curr->length );
989	_puts(" / vbase ");
990	_putx( curr->vbase );
991	_puts(" / pbase ");
992	_putl( curr->pbase );
993	_puts("\n");
994	}
995	}
996	#endif
997
998	} // end boot_ptabs_init()
999
1000	///////////////////////////////////////////////////////////////////////////////
1001	// This function initializes all private vobjs defined in the vspaces,
1002	// such as mwmr channels, barriers and locks, because these vobjs
1003	// are not known, and not initialized by the compiler.
1004	// The MMU is supposed to be activated...
1005	///////////////////////////////////////////////////////////////////////////////
1006	void boot_vobjs_init()
1007	{
1008	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1009	mapping_vspace_t* vspace = _get_vspace_base(header);
1010	mapping_vobj_t* vobj = _get_vobj_base(header);
1011
1012	unsigned int vspace_id;
1013	unsigned int vobj_id;
1014
1015	// loop on the vspaces
1016	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1017	{
1018
1019	#if BOOT_DEBUG_VOBJS
1020	_puts("\n[BOOT DEBUG] ****** vobjs initialisation in vspace ");
1021	_puts(vspace[vspace_id].name);
1022	_puts(" ******\n");
1023	#endif
1024
1025	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id][0][0] >> 13) );
1026
1027	// loop on the vobjs
1028	for (vobj_id = vspace[vspace_id].vobj_offset;
1029	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1030	vobj_id++)
1031	{
1032	switch (vobj[vobj_id].type)
1033	{
1034	case VOBJ_TYPE_MWMR: // storage capacity is (vobj.length/4 - 5) words
1035	{
1036	#if BOOT_DEBUG_VOBJS
1037	_puts("MWMR : ");
1038	_puts(vobj[vobj_id].name);
1039	_puts(" / vaddr = ");
1040	_putx(vobj[vobj_id].vaddr);
1041	_puts(" / paddr = ");
1042	_putl(vobj[vobj_id].paddr);
1043	_puts(" / length = ");
1044	_putx(vobj[vobj_id].length);
1045	_puts("\n");
1046	#endif
1047	mwmr_channel_t* mwmr = (mwmr_channel_t *) (vobj[vobj_id].vbase);
1048	mwmr->ptw = 0;
1049	mwmr->ptr = 0;
1050	mwmr->sts = 0;
1051	mwmr->width = vobj[vobj_id].init;
1052	mwmr->depth = (vobj[vobj_id].length >> 2) - 6;
1053	mwmr->lock = 0;
1054	#if BOOT_DEBUG_VOBJS
1055	_puts(" fifo depth = ");
1056	_putd(mwmr->depth);
1057	_puts(" / width = ");
1058	_putd(mwmr->width);
1059	_puts("\n");
1060	#endif
1061	break;
1062	}
1063	case VOBJ_TYPE_ELF: // initialisation done by the loader
1064	{
1065	#if BOOT_DEBUG_VOBJS
1066	_puts("ELF : ");
1067	_puts(vobj[vobj_id].name);
1068	_puts(" / vaddr = ");
1069	_putx(vobj[vobj_id].vaddr);
1070	_puts(" / paddr = ");
1071	_putl(vobj[vobj_id].paddr);
1072	_puts(" / length = ");
1073	_putx(vobj[vobj_id].length);
1074	_puts("\n");
1075	#endif
1076	break;
1077	}
1078	case VOBJ_TYPE_BLOB: // initialisation done by the loader
1079	{
1080	#if BOOT_DEBUG_VOBJS
1081	_puts("BLOB : ");
1082	_puts(vobj[vobj_id].name);
1083	_puts(" / vaddr = ");
1084	_putx(vobj[vobj_id].vaddr);
1085	_puts(" / paddr = ");
1086	_putl(vobj[vobj_id].paddr);
1087	_puts(" / length = ");
1088	_putx(vobj[vobj_id].length);
1089	_puts("\n");
1090	#endif
1091	break;
1092	}
1093	case VOBJ_TYPE_BARRIER: // init is the number of participants
1094	{
1095	#if BOOT_DEBUG_VOBJS
1096	_puts("BARRIER : ");
1097	_puts(vobj[vobj_id].name);
1098	_puts(" / vaddr = ");
1099	_putx(vobj[vobj_id].vaddr);
1100	_puts(" / paddr = ");
1101	_putl(vobj[vobj_id].paddr);
1102	_puts(" / length = ");
1103	_putx(vobj[vobj_id].length);
1104	_puts("\n");
1105	#endif
1106	giet_barrier_t* barrier = (giet_barrier_t *) (vobj[vobj_id].vbase);
1107	barrier->count = vobj[vobj_id].init;
1108	barrier->ntasks = vobj[vobj_id].init;
1109	barrier->sense = 0;
1110	#if BOOT_DEBUG_VOBJS
1111	_puts(" init_value = ");
1112	_putd(barrier->init);
1113	_puts("\n");
1114	#endif
1115	break;
1116	}
1117	case VOBJ_TYPE_LOCK: // init value is "not taken"
1118	{
1119	#if BOOT_DEBUG_VOBJS
1120	_puts("LOCK : ");
1121	_puts(vobj[vobj_id].name);
1122	_puts(" / vaddr = ");
1123	_putx(vobj[vobj_id].vaddr);
1124	_puts(" / paddr = ");
1125	_putl(vobj[vobj_id].paddr);
1126	_puts(" / length = ");
1127	_putx(vobj[vobj_id].length);
1128	_puts("\n");
1129	#endif
1130	unsigned int* lock = (unsigned int *) (vobj[vobj_id].vbase);
1131	*lock = 0;
1132	break;
1133	}
1134	case VOBJ_TYPE_BUFFER: // nothing to initialise
1135	{
1136	#if BOOT_DEBUG_VOBJS
1137	_puts("BUFFER : ");
1138	_puts(vobj[vobj_id].name);
1139	_puts(" / vaddr = ");
1140	_putx(vobj[vobj_id].vaddr);
1141	_puts(" / paddr = ");
1142	_putl(vobj[vobj_id].paddr);
1143	_puts(" / length = ");
1144	_putx(vobj[vobj_id].length);
1145	_puts("\n");
1146	#endif
1147	break;
1148	}
1149	case VOBJ_TYPE_MEMSPACE:
1150	{
1151	#if BOOT_DEBUG_VOBJS
1152	_puts("MEMSPACE : ");
1153	_puts(vobj[vobj_id].name);
1154	_puts(" / vaddr = ");
1155	_putx(vobj[vobj_id].vaddr);
1156	_puts(" / paddr = ");
1157	_putl(vobj[vobj_id].paddr);
1158	_puts(" / length = ");
1159	_putx(vobj[vobj_id].length);
1160	_puts("\n");
1161	#endif
1162	giet_memspace_t* memspace = (giet_memspace_t *) vobj[vobj_id].vbase;
1163	memspace->buffer = (void *) vobj[vobj_id].vbase + 8;
1164	memspace->size = vobj[vobj_id].length - 8;
1165	#if BOOT_DEBUG_VOBJS
1166	_puts(" buffer vbase = ");
1167	_putx((unsigned int)memspace->buffer);
1168	_puts(" / size = ");
1169	_putx(memspace->size);
1170	_puts("\n");
1171	#endif
1172	break;
1173	}
1174	case VOBJ_TYPE_CONST:
1175	{
1176	#if BOOT_DEBUG_VOBJS
1177	_puts("CONST : ");
1178	_puts(vobj[vobj_id].name);
1179	_puts(" / vaddr = ");
1180	_putx(vobj[vobj_id].vaddr);
1181	_puts(" / paddr = ");
1182	_putl(vobj[vobj_id].paddr);
1183	_puts(" / length = ");
1184	_putx(vobj[vobj_id].length);
1185	_puts(" / init = ");
1186	_putx(vobj[vobj_id].init);
1187	_puts("\n");
1188	#endif
1189	unsigned int* addr = (unsigned int *) vobj[vobj_id].vbase;
1190	*addr = vobj[vobj_id].init;
1191
1192	#if BOOT_DEBUG_VOBJS
1193	_puts(" init = ");
1194	_putx(*addr);
1195	_puts("\n");
1196	#endif
1197	break;
1198	}
1199	default:
1200	{
1201	_puts("\n[BOOT ERROR] in boot_vobjs_init() : Illegal vobj type ");
1202	_putd( vobj[vobj_id].type );
1203	_puts(" in vspace ");
1204	_puts( vspace[vspace_id].name );
1205	_puts("\n");
1206	_exit();
1207	}
1208	} // end switch type
1209	} // end loop on vobjs
1210	} // end loop on vspaces
1211	} // end boot_vobjs_init()
1212
1213	///////////////////////////////////////////////////////////////////////////////
1214	// This function returns in the vbase and length buffers the virtual base
1215	// address and the length of the segment allocated to the schedulers array
1216	// in the cluster defined by the clusterid argument.
1217	///////////////////////////////////////////////////////////////////////////////
1218	void boot_get_sched_vaddr( unsigned int cluster_id,
1219	unsigned int* vbase,
1220	unsigned int* length )
1221	{
1222	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1223	mapping_vobj_t* vobj = _get_vobj_base(header);
1224	mapping_vseg_t* vseg = _get_vseg_base(header);
1225	mapping_pseg_t* pseg = _get_pseg_base(header);
1226
1227	unsigned int vseg_id;
1228	unsigned int found = 0;
1229
1230	for ( vseg_id = 0 ; (vseg_id < header->vsegs) && (found == 0) ; vseg_id++ )
1231	{
1232	if ( (vobj[vseg[vseg_id].vobj_offset].type == VOBJ_TYPE_SCHED) &&
1233	(pseg[vseg[vseg_id].psegid].clusterid == cluster_id ) )
1234	{
1235	*vbase = vseg[vseg_id].vbase;
1236	*length = vobj[vseg[vseg_id].vobj_offset].length;
1237	found = 1;
1238	}
1239	}
1240	if ( found == 0 )
1241	{
1242	mapping_cluster_t* cluster = _get_cluster_base(header);
1243	_puts("\n[BOOT ERROR] No vobj of type SCHED in cluster [");
1244	_putd( cluster[cluster_id].x );
1245	_puts(",");
1246	_putd( cluster[cluster_id].y );
1247	_puts("]\n");
1248	_exit();
1249	}
1250	} // end boot_get_sched_vaddr()
1251
1252	////////////////////////////////////////////////////////////////////////////////////
1253	// This function initialises all processors schedulers.
1254	// This is done by processor 0, and the MMU must be activated.
1255	// - In Step 1, it initialises the _schedulers[x][y][l] pointers array, and scan
1256	// the processors for a first initialisation of the schedulers:
1257	// idle_task context, and HWI / SWI / PTI vectors.
1258	// - In Step 2, it scan all tasks in all vspaces to complete the tasks contexts,
1259	// initialisation as specified in the mapping_info data structure.
1260	////////////////////////////////////////////////////////////////////////////////////
1261	void boot_schedulers_init()
1262	{
1263	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1264	mapping_cluster_t* cluster = _get_cluster_base(header);
1265	mapping_vspace_t* vspace = _get_vspace_base(header);
1266	mapping_task_t* task = _get_task_base(header);
1267	mapping_vobj_t* vobj = _get_vobj_base(header);
1268	mapping_periph_t* periph = _get_periph_base(header);
1269	mapping_irq_t* irq = _get_irq_base(header);
1270
1271	unsigned int cluster_id; // cluster index in mapping_info
1272	unsigned int periph_id; // peripheral index in mapping_info
1273	unsigned int irq_id; // irq index in mapping_info
1274	unsigned int vspace_id; // vspace index in mapping_info
1275	unsigned int task_id; // task index in mapping_info
1276	unsigned int vobj_id; // vobj index in mapping_info
1277
1278	unsigned int lpid; // local processor index (for several loops)
1279
1280	// TTY, NIC, CMA, HBA, user timer, and WTI channel allocators to user tasks:
1281	// - TTY[0] is reserved for the kernel
1282	// - In all clusters the first NB_PROCS_MAX timers
1283	// are reserved for the kernel (context switch)
1284	unsigned int alloc_tty_channel = 1; // global
1285	unsigned int alloc_nic_channel = 0; // global
1286	unsigned int alloc_cma_channel = 0; // global
1287	unsigned int alloc_hba_channel = 0; // global
1288	unsigned int alloc_tim_channel[X_SIZE*Y_SIZE]; // one per cluster
1289
1290	// WTI allocators to processors
1291	// In all clusters, first NB_PROCS_MAX WTIs are for WAKUP
1292	unsigned int alloc_wti_channel[X_SIZE*Y_SIZE]; // one per cluster
1293
1294	// pointers on the XCU and PIC peripherals
1295	mapping_periph_t* xcu = NULL;
1296	mapping_periph_t* pic = NULL;
1297
1298	unsigned int sched_vbase; // schedulers array vbase address in a cluster
1299	unsigned int sched_length; // schedulers array length
1300	static_scheduler_t* psched; // pointer on processor scheduler
1301
1302	/////////////////////////////////////////////////////////////////////////
1303	// Step 1 : loop on the clusters and on the processors
1304	// to initialize the schedulers[] array of pointers,
1305	// idle task context and interrupt vectors.
1306	// Implementation note:
1307	// We need to use both (proc_id) to scan the mapping info structure,
1308	// and (x,y,lpid) to access the schedulers array.
1309
1310	for (cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
1311	{
1312	unsigned int x = cluster[cluster_id].x;
1313	unsigned int y = cluster[cluster_id].y;
1314
1315	#if BOOT_DEBUG_SCHED
1316	_puts("\n[BOOT DEBUG] Initialise schedulers in cluster[");
1317	_putd( x );
1318	_puts(",");
1319	_putd( y );
1320	_puts("]\n");
1321	#endif
1322	alloc_tim_channel[cluster_id] = NB_PROCS_MAX;
1323	alloc_wti_channel[cluster_id] = NB_PROCS_MAX;
1324
1325	// checking processors number
1326	if ( cluster[cluster_id].procs > NB_PROCS_MAX )
1327	{
1328	_puts("\n[BOOT ERROR] Too much processors in cluster[");
1329	_putd( x );
1330	_puts(",");
1331	_putd( y );
1332	_puts("]\n");
1333	_exit();
1334	}
1335
1336	// no schedulers initialisation if nprocs == 0
1337	if ( cluster[cluster_id].procs > 0 )
1338	{
1339	// get scheduler array virtual base address in cluster[cluster_id]
1340	boot_get_sched_vaddr( cluster_id, &sched_vbase, &sched_length );
1341
1342	if ( sched_length < (cluster[cluster_id].procs<<13) ) // 8 Kbytes per scheduler
1343	{
1344	_puts("\n[BOOT ERROR] Schedulers segment too small in cluster[");
1345	_putd( x );
1346	_puts(",");
1347	_putd( y );
1348	_puts("]\n");
1349	_exit();
1350	}
1351
1352	// scan peripherals to find the ICU/XCU and the PIC component
1353
1354	xcu = NULL;
1355	for ( periph_id = cluster[cluster_id].periph_offset ;
1356	periph_id < cluster[cluster_id].periph_offset + cluster[cluster_id].periphs;
1357	periph_id++ )
1358	{
1359	if( (periph[periph_id].type == PERIPH_TYPE_XCU) \|\|
1360	(periph[periph_id].type == PERIPH_TYPE_ICU) )
1361	{
1362	xcu = &periph[periph_id];
1363
1364	if ( xcu->arg < cluster[cluster_id].procs )
1365	{
1366	_puts("\n[BOOT ERROR] Not enough inputs for XCU[");
1367	_putd( x );
1368	_puts(",");
1369	_putd( y );
1370	_puts("]\n");
1371	_exit();
1372	}
1373	}
1374	if( periph[periph_id].type == PERIPH_TYPE_PIC )
1375	{
1376	pic = &periph[periph_id];
1377	}
1378	}
1379	if ( xcu == NULL )
1380	{
1381	_puts("\n[BOOT ERROR] No ICU / XCU component in cluster[");
1382	_putd( x );
1383	_puts(",");
1384	_putd( y );
1385	_puts("]\n");
1386	_exit();
1387	}
1388
1389	// loop on processors for schedulers default values
1390	// initialisation, including WTI and PTI vectors
1391	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1392	{
1393	// pointer on processor scheduler
1394	psched = (static_scheduler_t*)(sched_vbase + (lpid<<13));
1395
1396	// initialise the schedulers pointers array
1397	_schedulers[x][y][lpid] = psched;
1398
1399	#if BOOT_DEBUG_SCHED
1400	unsigned int sched_vbase = (unsigned int)_schedulers[x][y][lpid];
1401	unsigned int sched_ppn;
1402	unsigned int sched_flags;
1403	paddr_t sched_pbase;
1404
1405	page_table_t* ptab = (page_table_t*)(_ptabs_vaddr[0][x][y]);
1406	_v2p_translate( ptab, sched_vbase>>12, &sched_ppn, &sched_flags );
1407	sched_pbase = ((paddr_t)sched_ppn)<<12;
1408
1409	_puts("\nProc[");
1410	_putd( x );
1411	_puts(",");
1412	_putd( y );
1413	_puts(",");
1414	_putd( lpid );
1415	_puts("] : scheduler vbase = ");
1416	_putx( sched_vbase );
1417	_puts(" : scheduler pbase = ");
1418	_putl( sched_pbase );
1419	_puts("\n");
1420	#endif
1421	// initialise the "tasks" and "current" variables default values
1422	psched->tasks = 0;
1423	psched->current = IDLE_TASK_INDEX;
1424
1425	// default values for HWI / PTI / SWI vectors (valid bit = 0)
1426	unsigned int slot;
1427	for (slot = 0; slot < 32; slot++)
1428	{
1429	psched->hwi_vector[slot] = 0;
1430	psched->pti_vector[slot] = 0;
1431	psched->wti_vector[slot] = 0;
1432	}
1433
1434	// WTI[lpid] <= ISR_WAKUP / PTI[lpid] <= ISR_TICK
1435	psched->wti_vector[lpid] = ISR_WAKUP \| 0x80000000;
1436	psched->pti_vector[lpid] = ISR_TICK \| 0x80000000;
1437
1438	// initializes the idle_task context in scheduler:
1439	// - the SR slot is 0xFF03 because this task run in kernel mode.
1440	// - it uses the page table of vspace[0]
1441	// - it uses the kernel TTY terminal
1442	// - slots containing addresses (SP, RA, EPC)
1443	// must be initialised by kernel_init()
1444
1445	psched->context[IDLE_TASK_INDEX][CTX_CR_ID] = 0;
1446	psched->context[IDLE_TASK_INDEX][CTX_SR_ID] = 0xFF03;
1447	psched->context[IDLE_TASK_INDEX][CTX_PTPR_ID] = _ptabs_paddr[0][x][y]>>13;
1448	psched->context[IDLE_TASK_INDEX][CTX_PTAB_ID] = _ptabs_vaddr[0][x][y];
1449	psched->context[IDLE_TASK_INDEX][CTX_TTY_ID] = 0;
1450	psched->context[IDLE_TASK_INDEX][CTX_LTID_ID] = IDLE_TASK_INDEX;
1451	psched->context[IDLE_TASK_INDEX][CTX_VSID_ID] = 0;
1452	psched->context[IDLE_TASK_INDEX][CTX_RUN_ID] = 1;
1453
1454	} // end for processors
1455
1456	// scan HWIs connected to local XCU
1457	// for round-robin allocation to processors
1458	lpid = 0;
1459	for ( irq_id = xcu->irq_offset ;
1460	irq_id < xcu->irq_offset + xcu->irqs ;
1461	irq_id++ )
1462	{
1463	unsigned int type = irq[irq_id].srctype;
1464	unsigned int srcid = irq[irq_id].srcid;
1465	unsigned int isr = irq[irq_id].isr & 0xFFFF;
1466	unsigned int channel = irq[irq_id].channel << 16;
1467
1468	if ( (type != IRQ_TYPE_HWI) \|\| (srcid > 31) )
1469	{
1470	_puts("\n[BOOT ERROR] Bad IRQ in XCU of cluster[");
1471	_putd( x );
1472	_puts(",");
1473	_putd( y );
1474	_puts("]\n");
1475	_exit();
1476	}
1477
1478	_schedulers[x][y][lpid]->hwi_vector[srcid] = isr \| channel \| 0x80000000;
1479	lpid = (lpid + 1) % cluster[cluster_id].procs;
1480
1481	} // end for irqs
1482	} // end if nprocs > 0
1483	} // end for clusters
1484
1485	// If there is an external PIC component, we scan HWIs connected to PIC
1486	// for Round Robin allocation (as WTI) to processors.
1487	// We allocate one WTI per processor, starting from proc[0,0,0],
1488	// and we increment (cluster_id, lpid) as required.
1489	if ( pic != NULL )
1490	{
1491	unsigned int cluster_id = 0; // index in clusters array
1492	unsigned int lpid = 0; // processor local index
1493
1494	// scan IRQS defined in PIC
1495	for ( irq_id = pic->irq_offset ;
1496	irq_id < pic->irq_offset + pic->irqs ;
1497	irq_id++ )
1498	{
1499	// compute next values for (cluster_id,lpid)
1500	// if no more procesor available in current cluster
1501	unsigned int overflow = 0;
1502	while ( (lpid >= cluster[cluster_id].procs) \|\|
1503	(alloc_wti_channel[cluster_id] >= xcu->arg) )
1504	{
1505	overflow++;
1506	cluster_id = (cluster_id + 1) % (X_SIZE*Y_SIZE);
1507	lpid = 0;
1508
1509	// overflow detection
1510	if ( overflow > (X_SIZEY_SIZENB_PROCS_MAX*32) )
1511	{
1512	_puts("\n[BOOT ERROR] Not enough processors for external IRQs\n");
1513	_exit();
1514	}
1515	}
1516
1517	unsigned int type = irq[irq_id].srctype;
1518	unsigned int srcid = irq[irq_id].srcid;
1519	unsigned int isr = irq[irq_id].isr & 0xFFFF;
1520	unsigned int channel = irq[irq_id].channel << 16;
1521
1522	if ( (type != IRQ_TYPE_HWI) \|\| (srcid > 31) )
1523	{
1524	_puts("\n[BOOT ERROR] Bad IRQ in PIC component\n");
1525	_exit();
1526	}
1527
1528	// get scheduler[cluster_id] address
1529	unsigned int x = cluster[cluster_id].x;
1530	unsigned int y = cluster[cluster_id].y;
1531	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1532	psched = _schedulers[x][y][lpid];
1533
1534	// update WTI vector for scheduler[cluster_id][lpid]
1535	unsigned int index = alloc_wti_channel[cluster_id];
1536	psched->wti_vector[index] = isr \| channel \| 0x80000000;
1537	alloc_wti_channel[cluster_id] = index + 1;
1538	lpid = lpid + 1;
1539
1540	// update IRQ fields in mapping for PIC initialisation
1541	irq[irq_id].dest_id = index;
1542	irq[irq_id].dest_xy = cluster_xy;
1543
1544	} // end for IRQs
1545	} // end if PIC
1546
1547	#if BOOT_DEBUG_SCHED
1548	for ( cluster_id = 0 ; cluster_id < (X_SIZE*Y_SIZE) ; cluster_id++ )
1549	{
1550	unsigned int x = cluster[cluster_id].x;
1551	unsigned int y = cluster[cluster_id].y;
1552	unsigned int slot;
1553	unsigned int entry;
1554	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1555	{
1556	psched = _schedulers[x][y][lpid];
1557
1558	_puts("\n*** IRQS for proc[");
1559	_putd( x );
1560	_puts(",");
1561	_putd( y );
1562	_puts(",");
1563	_putd( lpid );
1564	_puts("]\n");
1565	for ( slot = 0 ; slot < 32 ; slot++ )
1566	{
1567	entry = psched->hwi_vector[slot];
1568	if ( entry & 0x80000000 )
1569	{
1570	_puts(" - HWI ");
1571	_putd( slot );
1572	_puts(" / isrtype = ");
1573	_putd( entry & 0xFFFF );
1574	_puts(" / channel = ");
1575	_putd( (entry >> 16) & 0x7FFF );
1576	_puts("\n");
1577	}
1578	}
1579	for ( slot = 0 ; slot < 32 ; slot++ )
1580	{
1581	entry = psched->wti_vector[slot];
1582	if ( entry & 0x80000000 )
1583	{
1584	_puts(" - WTI ");
1585	_putd( slot );
1586	_puts(" / isrtype = ");
1587	_putd( entry & 0xFFFF );
1588	_puts(" / channel = ");
1589	_putd( (entry >> 16) & 0x7FFF );
1590	_puts("\n");
1591	}
1592	}
1593	for ( slot = 0 ; slot < 32 ; slot++ )
1594	{
1595	entry = psched->pti_vector[slot];
1596	if ( entry & 0x80000000 )
1597	{
1598	_puts(" - PTI ");
1599	_putd( slot );
1600	_puts(" / isrtype = ");
1601	_putd( entry & 0xFFFF );
1602	_puts(" / channel = ");
1603	_putd( (entry >> 16) & 0x7FFF );
1604	_puts("\n");
1605	}
1606	}
1607	}
1608	}
1609	#endif
1610
1611	///////////////////////////////////////////////////////////////////
1612	// Step 2 : loop on the vspaces and the tasks to complete
1613	// the schedulers and task contexts initialisation.
1614
1615	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1616	{
1617	// We must set the PTPR depending on the vspace, because the start_vector
1618	// and the stack address are defined in virtual space.
1619	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id][0][0] >> 13) );
1620
1621	// loop on the tasks in vspace (task_id is the global index in mapping)
1622	for (task_id = vspace[vspace_id].task_offset;
1623	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
1624	task_id++)
1625	{
1626	// compute the cluster coordinates & local processor index
1627	unsigned int x = cluster[task[task_id].clusterid].x;
1628	unsigned int y = cluster[task[task_id].clusterid].y;
1629	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1630	unsigned int lpid = task[task_id].proclocid;
1631
1632	#if BOOT_DEBUG_SCHED
1633	_puts("\n[BOOT DEBUG] Initialise context for task ");
1634	_puts( task[task_id].name );
1635	_puts(" in vspace ");
1636	_puts( vspace[vspace_id].name );
1637	_puts("\n");
1638	#endif
1639	// compute gpid (global processor index) and scheduler base address
1640	unsigned int gpid = (cluster_xy << P_WIDTH) + lpid;
1641	psched = _schedulers[x][y][lpid];
1642
1643	// ctx_sr : value required before an eret instruction
1644	unsigned int ctx_sr = 0x0000FF13;
1645
1646	// ctx_ptpr : page table physical base address (shifted by 13 bit)
1647	unsigned int ctx_ptpr = (unsigned int)(_ptabs_paddr[vspace_id][x][y] >> 13);
1648
1649	// ctx_ptab : page_table virtual base address
1650	unsigned int ctx_ptab = _ptabs_vaddr[vspace_id][x][y];
1651
1652	// ctx_tty : TTY terminal global index provided by the global allocator
1653	// Each user terminal is a private ressource: the number of
1654	// requested terminal cannot be larger than NB_TTY_CHANNELS.
1655	unsigned int ctx_tty = 0xFFFFFFFF;
1656	if (task[task_id].use_tty)
1657	{
1658	if (alloc_tty_channel >= NB_TTY_CHANNELS)
1659	{
1660	_puts("\n[BOOT ERROR] TTY channel index too large for task ");
1661	_puts(task[task_id].name);
1662	_puts(" in vspace ");
1663	_puts(vspace[vspace_id].name);
1664	_puts("\n");
1665	_exit();
1666	}
1667	ctx_tty = alloc_tty_channel;
1668	alloc_tty_channel++;
1669	}
1670
1671	// ctx_nic : NIC channel global index provided by the global allocator
1672	// Each channel is a private ressource: the number of
1673	// requested channels cannot be larger than NB_NIC_CHANNELS.
1674	unsigned int ctx_nic = 0xFFFFFFFF;
1675	if (task[task_id].use_nic)
1676	{
1677	if (alloc_nic_channel >= NB_NIC_CHANNELS)
1678	{
1679	_puts("\n[BOOT ERROR] NIC channel index too large for task ");
1680	_puts(task[task_id].name);
1681	_puts(" in vspace ");
1682	_puts(vspace[vspace_id].name);
1683	_puts("\n");
1684	_exit();
1685	}
1686	ctx_nic = alloc_nic_channel;
1687	alloc_nic_channel++;
1688	}
1689
1690	// ctx_cma : CMA channel global index provided by the global allocator
1691	// Each channel is a private ressource: the number of
1692	// requested channels cannot be larger than NB_NIC_CHANNELS.
1693	unsigned int ctx_cma = 0xFFFFFFFF;
1694	if (task[task_id].use_cma)
1695	{
1696	if (alloc_cma_channel >= NB_CMA_CHANNELS)
1697	{
1698	_puts("\n[BOOT ERROR] CMA channel index too large for task ");
1699	_puts(task[task_id].name);
1700	_puts(" in vspace ");
1701	_puts(vspace[vspace_id].name);
1702	_puts("\n");
1703	_exit();
1704	}
1705	ctx_cma = alloc_cma_channel;
1706	alloc_cma_channel++;
1707	}
1708
1709	// ctx_hba : HBA channel global index provided by the global allocator
1710	// Each channel is a private ressource: the number of
1711	// requested channels cannot be larger than NB_NIC_CHANNELS.
1712	unsigned int ctx_hba = 0xFFFFFFFF;
1713	if (task[task_id].use_hba)
1714	{
1715	if (alloc_hba_channel >= NB_IOC_CHANNELS)
1716	{
1717	_puts("\n[BOOT ERROR] IOC channel index too large for task ");
1718	_puts(task[task_id].name);
1719	_puts(" in vspace ");
1720	_puts(vspace[vspace_id].name);
1721	_puts("\n");
1722	_exit();
1723	}
1724	ctx_hba = alloc_hba_channel;
1725	alloc_hba_channel++;
1726	}
1727	// ctx_tim : TIMER local channel index provided by the cluster allocator
1728	// Each timer is a private ressource
1729	unsigned int ctx_tim = 0xFFFFFFFF;
1730	if (task[task_id].use_tim)
1731	{
1732	unsigned int cluster_id = task[task_id].clusterid;
1733
1734	if ( alloc_tim_channel[cluster_id] >= NB_TIM_CHANNELS )
1735	{
1736	_puts("\n[BOOT ERROR] local TIMER index too large for task ");
1737	_puts(task[task_id].name);
1738	_puts(" in vspace ");
1739	_puts(vspace[vspace_id].name);
1740	_puts("\n");
1741	_exit();
1742	}
1743	ctx_tim = alloc_tim_channel[cluster_id];
1744	alloc_tim_channel[cluster_id]++;
1745	}
1746	// ctx_epc : Get the virtual address of the memory location containing
1747	// the task entry point : the start_vector is stored by GCC in the seg_data
1748	// segment and we must wait the .elf loading to get the entry point value...
1749	vobj_id = vspace[vspace_id].start_vobj_id;
1750	unsigned int ctx_epc = vobj[vobj_id].vbase + (task[task_id].startid)*4;
1751
1752	// ctx_sp : Get the vobj containing the stack
1753	vobj_id = task[task_id].stack_vobj_id;
1754	unsigned int ctx_sp = vobj[vobj_id].vbase + vobj[vobj_id].length;
1755
1756	// get local task index in scheduler
1757	unsigned int ltid = psched->tasks;
1758
1759	// get vspace thread index
1760	unsigned int thread_id = task[task_id].trdid;
1761
1762	if (ltid >= IDLE_TASK_INDEX)
1763	{
1764	_puts("\n[BOOT ERROR] in boot_schedulers_init() : ");
1765	_putd( ltid );
1766	_puts(" tasks allocated to processor ");
1767	_putd( gpid );
1768	_puts(" / max is ");
1769	_putd( IDLE_TASK_INDEX );
1770	_puts("\n");
1771	_exit();
1772	}
1773
1774	// update the "tasks" and "current" fields in scheduler:
1775	// the first task to execute is task 0 as soon as there is at least
1776	// one task allocated to processor.
1777	psched->tasks = ltid + 1;
1778	psched->current = 0;
1779
1780	// initializes the task context in scheduler
1781	psched->context[ltid][CTX_CR_ID] = 0;
1782	psched->context[ltid][CTX_SR_ID] = ctx_sr;
1783	psched->context[ltid][CTX_SP_ID] = ctx_sp;
1784	psched->context[ltid][CTX_EPC_ID] = ctx_epc;
1785	psched->context[ltid][CTX_PTPR_ID] = ctx_ptpr;
1786	psched->context[ltid][CTX_TTY_ID] = ctx_tty;
1787	psched->context[ltid][CTX_CMA_ID] = ctx_cma;
1788	psched->context[ltid][CTX_HBA_ID] = ctx_hba;
1789	psched->context[ltid][CTX_NIC_ID] = ctx_nic;
1790	psched->context[ltid][CTX_TIM_ID] = ctx_tim;
1791	psched->context[ltid][CTX_PTAB_ID] = ctx_ptab;
1792	psched->context[ltid][CTX_LTID_ID] = ltid;
1793	psched->context[ltid][CTX_GTID_ID] = task_id;
1794	psched->context[ltid][CTX_TRDID_ID] = thread_id;
1795	psched->context[ltid][CTX_VSID_ID] = vspace_id;
1796	psched->context[ltid][CTX_RUN_ID] = 1;
1797
1798	#if BOOT_DEBUG_SCHED
1799	_puts("\nTask ");
1800	_putd( task_id );
1801	_puts(" allocated to processor[");
1802	_putd( x );
1803	_puts(",");
1804	_putd( y );
1805	_puts(",");
1806	_putd( lpid );
1807	_puts("]\n - ctx[LTID] = ");
1808	_putd( psched->context[ltid][CTX_LTID_ID] );
1809	_puts("\n - ctx[SR] = ");
1810	_putx( psched->context[ltid][CTX_SR_ID] );
1811	_puts("\n - ctx[SP] = ");
1812	_putx( psched->context[ltid][CTX_SP_ID] );
1813	_puts("\n - ctx[EPC] = ");
1814	_putx( psched->context[ltid][CTX_EPC_ID] );
1815	_puts("\n - ctx[PTPR] = ");
1816	_putx( psched->context[ltid][CTX_PTPR_ID] );
1817	_puts("\n - ctx[TTY] = ");
1818	_putx( psched->context[ltid][CTX_TTY_ID] );
1819	_puts("\n - ctx[NIC] = ");
1820	_putx( psched->context[ltid][CTX_NIC_ID] );
1821	_puts("\n - ctx[CMA] = ");
1822	_putx( psched->context[ltid][CTX_CMA_ID] );
1823	_puts("\n - ctx[IOC] = ");
1824	_putx( psched->context[ltid][CTX_HBA_ID] );
1825	_puts("\n - ctx[TIM] = ");
1826	_putx( psched->context[ltid][CTX_TIM_ID] );
1827	_puts("\n - ctx[PTAB] = ");
1828	_putx( psched->context[ltid][CTX_PTAB_ID] );
1829	_puts("\n - ctx[GTID] = ");
1830	_putx( psched->context[ltid][CTX_GTID_ID] );
1831	_puts("\n - ctx[VSID] = ");
1832	_putx( psched->context[ltid][CTX_VSID_ID] );
1833	_puts("\n - ctx[TRDID] = ");
1834	_putx( psched->context[ltid][CTX_TRDID_ID] );
1835	_puts("\n");
1836	#endif
1837
1838	} // end loop on tasks
1839	} // end loop on vspaces
1840	} // end boot_schedulers_init()
1841
1842	//////////////////////////////////////////////////////////////////////////////////
1843	// This function loads the map.bin file from block device.
1844	//////////////////////////////////////////////////////////////////////////////////
1845	void boot_mapping_init()
1846	{
1847	// desactivates IOC interrupt
1848	_ioc_init( 0 );
1849
1850	// open file "map.bin"
1851	int fd_id = _fat_open( IOC_BOOT_MODE,
1852	"map.bin",
1853	0 ); // no creation
1854	if ( fd_id == -1 )
1855	{
1856	_puts("\n[BOOT ERROR] : map.bin file not found \n");
1857	_exit();
1858	}
1859
1860	#if BOOT_DEBUG_MAPPING
1861	_puts("\n[BOOT] map.bin file successfully open at cycle ");
1862	_putd(_get_proctime());
1863	_puts("\n");
1864	#endif
1865
1866	// get "map.bin" file size (from fat) and check it
1867	unsigned int size = fat.fd[fd_id].file_size;
1868
1869	if ( size > SEG_BOOT_MAPPING_SIZE )
1870	{
1871	_puts("\n[BOOT ERROR] : allocated segment too small for map.bin file\n");
1872	_exit();
1873	}
1874
1875	// load "map.bin" file into buffer
1876	unsigned int nblocks = size >> 9;
1877	unsigned int offset = size & 0x1FF;
1878	if ( offset ) nblocks++;
1879
1880	unsigned int ok = _fat_read( IOC_BOOT_MODE,
1881	fd_id,
1882	(unsigned int*)SEG_BOOT_MAPPING_BASE,
1883	nblocks,
1884	0 ); // offset
1885	if ( ok == -1 )
1886	{
1887	_puts("\n[BOOT ERROR] : unable to load map.bin file \n");
1888	_exit();
1889	}
1890	_fat_close( fd_id );
1891
1892	// close file "map.bin"
1893	boot_mapping_check();
1894
1895	} // end boot_mapping_init()
1896
1897
1898	/////////////////////////////////////////////////////////////////////////////////////
1899	// This function load all loadable segments for one .elf file, identified
1900	// by the "pathname" argument. Some loadable segments can be copied in several
1901	// clusters: same virtual address but different physical addresses.
1902	// - It open the file.
1903	// - It loads the complete file in the dedicated boot_elf_buffer.
1904	// - It copies each loadable segments at the virtual address defined in
1905	// the .elf file, making several copies if the target vseg is not local.
1906	// - It closes the file.
1907	// This function is supposed to be executed by processor[0,0,0].
1908	// Note:
1909	// We must use physical addresses to reach the destination buffers that
1910	// can be located in remote clusters. We use either a _physical_memcpy(),
1911	// or a _dma_physical_copy() if DMA is available.
1912	//////////////////////////////////////////////////////////////////////////////////////
1913	void load_one_elf_file( unsigned int is_kernel, // kernel file if non zero
1914	char* pathname,
1915	unsigned int vspace_id ) // to scan the proper vspace
1916	{
1917	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1918	mapping_vspace_t * vspace = _get_vspace_base(header);
1919	mapping_vseg_t * vseg = _get_vseg_base(header);
1920	mapping_vobj_t * vobj = _get_vobj_base(header);
1921
1922	unsigned int seg_id;
1923
1924	#if BOOT_DEBUG_ELF
1925	_puts("\n[BOOT DEBUG] Start searching file ");
1926	_puts( pathname );
1927	_puts(" at cycle ");
1928	_putd( _get_proctime() );
1929	_puts("\n");
1930	#endif
1931
1932	// open .elf file
1933	int fd_id = _fat_open( IOC_BOOT_MODE,
1934	pathname,
1935	0 ); // no creation
1936	if ( fd_id < 0 )
1937	{
1938	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1939	_puts( pathname );
1940	_puts(" not found\n");
1941	_exit();
1942	}
1943
1944	// check buffer size versus file size
1945	if ( fat.fd[fd_id].file_size > GIET_ELF_BUFFER_SIZE )
1946	{
1947	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1948	_puts( pathname );
1949	_puts(" exceeds the GIET_ELF_BUFFERSIZE defined in giet_config.h\n");
1950	_exit();
1951	}
1952
1953	// compute number of sectors
1954	unsigned int nbytes = fat.fd[fd_id].file_size;
1955	unsigned int nsectors = nbytes>>9;
1956	if( nbytes & 0x1FF) nsectors++;
1957
1958	// load file in elf buffer
1959	if( _fat_read( IOC_BOOT_MODE,
1960	fd_id,
1961	boot_elf_buffer,
1962	nsectors,
1963	0 ) != nsectors )
1964	{
1965	_puts("\n[BOOT ERROR] load_one_elf_file() : unexpected EOF for file ");
1966	_puts( pathname );
1967	_puts("\n");
1968	_exit();
1969	}
1970
1971	// Check ELF Magic Number in ELF header
1972	Elf32_Ehdr* elf_header_ptr = (Elf32_Ehdr*)boot_elf_buffer;
1973
1974	if ( (elf_header_ptr->e_ident[EI_MAG0] != ELFMAG0) \|\|
1975	(elf_header_ptr->e_ident[EI_MAG1] != ELFMAG1) \|\|
1976	(elf_header_ptr->e_ident[EI_MAG2] != ELFMAG2) \|\|
1977	(elf_header_ptr->e_ident[EI_MAG3] != ELFMAG3) )
1978	{
1979	_puts("\n[BOOT ERROR] load_elf() : file ");
1980	_puts( pathname );
1981	_puts(" does not use ELF format\n");
1982	_exit();
1983	}
1984
1985	// get program header table pointer
1986	unsigned int pht_index = elf_header_ptr->e_phoff;
1987	if( pht_index == 0 )
1988	{
1989	_puts("\n[BOOT ERROR] load_one_elf_file() : file ");
1990	_puts( pathname );
1991	_puts(" does not contain loadable segment\n");
1992	_exit();
1993	}
1994	Elf32_Phdr* elf_pht_ptr = (Elf32_Phdr*)(boot_elf_buffer + pht_index);
1995
1996	// get number of segments
1997	unsigned int nsegments = elf_header_ptr->e_phnum;
1998
1999	_puts("\n[BOOT] File ");
2000	_puts( pathname );
2001	_puts(" loaded at cycle ");
2002	_putd( _get_proctime() );
2003	_puts("\n");
2004
2005	// Loop on loadable segments in the .elf file
2006	for (seg_id = 0 ; seg_id < nsegments ; seg_id++)
2007	{
2008	if(elf_pht_ptr[seg_id].p_type == PT_LOAD)
2009	{
2010	// Get segment attributes
2011	unsigned int seg_vaddr = elf_pht_ptr[seg_id].p_vaddr;
2012	unsigned int seg_offset = elf_pht_ptr[seg_id].p_offset;
2013	unsigned int seg_filesz = elf_pht_ptr[seg_id].p_filesz;
2014	unsigned int seg_memsz = elf_pht_ptr[seg_id].p_memsz;
2015
2016	#if BOOT_DEBUG_ELF
2017	_puts(" - segment ");
2018	_putd( seg_id );
2019	_puts(" / vaddr = ");
2020	_putx( seg_vaddr );
2021	_puts(" / file_size = ");
2022	_putx( seg_filesz );
2023	_puts("\n");
2024	#endif
2025
2026	if( seg_memsz < seg_filesz )
2027	{
2028	_puts("\n[BOOT ERROR] load_one_elf_file() : segment at vaddr = ");
2029	_putx( seg_vaddr );
2030	_puts(" in file ");
2031	_puts( pathname );
2032	_puts(" has memsz < filesz \n");
2033	_exit();
2034	}
2035
2036	// fill empty space with 0 as required
2037	if( seg_memsz > seg_filesz )
2038	{
2039	unsigned int i;
2040	for( i = seg_filesz ; i < seg_memsz ; i++ ) boot_elf_buffer[i+seg_offset] = 0;
2041	}
2042
2043	unsigned int src_vaddr = (unsigned int)boot_elf_buffer + seg_offset;
2044
2045	// search all vsegs matching the virtual address
2046	unsigned int vseg_first;
2047	unsigned int vseg_last;
2048	unsigned int vseg_id;
2049	unsigned int found = 0;
2050	if ( is_kernel )
2051	{
2052	vseg_first = 0;
2053	vseg_last = header->globals;
2054	}
2055	else
2056	{
2057	vseg_first = vspace[vspace_id].vseg_offset;
2058	vseg_last = vseg_first + vspace[vspace_id].vsegs;
2059	}
2060
2061	for ( vseg_id = vseg_first ; vseg_id < vseg_last ; vseg_id++ )
2062	{
2063	if ( seg_vaddr == vseg[vseg_id].vbase ) // matching
2064	{
2065	found = 1;
2066
2067	// get destination buffer physical address and size
2068	paddr_t seg_paddr = vseg[vseg_id].pbase;
2069	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
2070	unsigned int seg_size = vobj[vobj_id].length;
2071
2072	#if BOOT_DEBUG_ELF
2073	_puts(" loaded into vseg ");
2074	_puts( vseg[vseg_id].name );
2075	_puts(" at paddr = ");
2076	_putl( seg_paddr );
2077	_puts(" (buffer size = ");
2078	_putx( seg_size );
2079	_puts(")\n");
2080	#endif
2081	// check vseg size
2082	if ( seg_size < seg_filesz )
2083	{
2084	_puts("\n[BOOT ERROR] in load_one_elf_file()\n");
2085	_puts("vseg ");
2086	_puts( vseg[vseg_id].name );
2087	_puts(" is to small for loadable segment ");
2088	_putx( seg_vaddr );
2089	_puts(" in file ");
2090	_puts( pathname );
2091	_puts(" \n");
2092	_exit();
2093	}
2094
2095	// copy the segment from boot buffer to destination buffer
2096	// using DMA channel[0,0,0] if it is available.
2097	if( NB_DMA_CHANNELS > 0 )
2098	{
2099	_dma_physical_copy( 0, // DMA in cluster[0,0]
2100	0, // DMA channel 0
2101	(paddr_t)seg_paddr, // destination paddr
2102	(paddr_t)src_vaddr, // source paddr
2103	seg_filesz ); // size
2104	}
2105	else
2106	{
2107	_physical_memcpy( (paddr_t)seg_paddr, // destination paddr
2108	(paddr_t)src_vaddr, // source paddr
2109	seg_filesz ); // size
2110	}
2111	}
2112	} // end for vsegs in vspace
2113
2114	// check at least one matching vseg
2115	if ( found == 0 )
2116	{
2117	_puts("\n[BOOT ERROR] in load_one_elf_file()\n");
2118	_puts("vseg for loadable segment ");
2119	_putx( seg_vaddr );
2120	_puts(" in file ");
2121	_puts( pathname );
2122	_puts(" not found \n");
2123	_exit();
2124	}
2125	}
2126	} // end for loadable segments
2127
2128	// close .elf file
2129	_fat_close( fd_id );
2130
2131	} // end load_one_elf_file()
2132
2133
2134	/////i////////////////////////////////////////////////////////////////////////////////
2135	// This function uses the map.bin data structure to load the "kernel.elf" file
2136	// as well as the various "application.elf" files into memory.
2137	// - The "preloader.elf" file is not loaded, because it has been burned in the ROM.
2138	// - The "boot.elf" file is not loaded, because it has been loaded by the preloader.
2139	// This function scans all vobjs defined in the map.bin data structure to collect
2140	// all .elf files pathnames, and calls the load_one_elf_file() for each .elf file.
2141	// As the code can be replicated in several vsegs, the same code can be copied
2142	// in one or several clusters by the load_one_elf_file() function.
2143	//////////////////////////////////////////////////////////////////////////////////////
2144	void boot_elf_load()
2145	{
2146	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2147	mapping_vspace_t* vspace = _get_vspace_base( header );
2148	mapping_vobj_t* vobj = _get_vobj_base( header );
2149	unsigned int vspace_id;
2150	unsigned int vobj_id;
2151	unsigned int found;
2152
2153	// Scan all vobjs corresponding to global vsegs,
2154	// to find the pathname to the kernel.elf file
2155	found = 0;
2156	for( vobj_id = 0 ; vobj_id < header->globals ; vobj_id++ )
2157	{
2158	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
2159	{
2160	found = 1;
2161	break;
2162	}
2163	}
2164
2165	// We need one kernel.elf file
2166	if (found == 0)
2167	{
2168	_puts("[BOOT ERROR] boot_elf_load() : kernel.elf file not found\n");
2169	_exit();
2170	}
2171
2172	// Load the kernel
2173	load_one_elf_file( 1, // kernel file
2174	vobj[vobj_id].binpath, // file pathname
2175	0 ); // vspace 0
2176
2177	// loop on the vspaces, scanning all vobjs in the vspace,
2178	// to find the pathname of the .elf file associated to the vspace.
2179	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
2180	{
2181	// loop on the vobjs in vspace (vobj_id is the global index)
2182	unsigned int found = 0;
2183	for (vobj_id = vspace[vspace_id].vobj_offset;
2184	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
2185	vobj_id++)
2186	{
2187	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
2188	{
2189	found = 1;
2190	break;
2191	}
2192	}
2193
2194	// We want one .elf file per vspace
2195	if (found == 0)
2196	{
2197	_puts("[BOOT ERROR] boot_elf_load() : .elf file not found for vspace ");
2198	_puts( vspace[vspace_id].name );
2199	_puts("\n");
2200	_exit();
2201	}
2202
2203	load_one_elf_file( 0, // not a kernel file
2204	vobj[vobj_id].binpath, // file pathname
2205	vspace_id ); // vspace index
2206
2207	} // end for vspaces
2208
2209	} // end boot_elf_load()
2210
2211	////////////////////////////////////////////////////////////////////////////////
2212	// This function intializes the periherals and coprocessors, as specified
2213	// in the mapping_info file.
2214	////////////////////////////////////////////////////////////////////////////////
2215	void boot_peripherals_init()
2216	{
2217	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2218	mapping_cluster_t * cluster = _get_cluster_base(header);
2219	mapping_periph_t * periph = _get_periph_base(header);
2220	mapping_vobj_t * vobj = _get_vobj_base(header);
2221	mapping_coproc_t * coproc = _get_coproc_base(header);
2222	mapping_cp_port_t * cp_port = _get_cp_port_base(header);
2223	mapping_irq_t * irq = _get_irq_base(header);
2224
2225	unsigned int cluster_id;
2226	unsigned int periph_id;
2227	unsigned int coproc_id;
2228	unsigned int cp_port_id;
2229	unsigned int channel_id;
2230
2231	// loop on all physical clusters
2232	for (cluster_id = 0; cluster_id < X_SIZE*Y_SIZE; cluster_id++)
2233	{
2234	// computes cluster coordinates
2235	unsigned int x = cluster[cluster_id].x;
2236	unsigned int y = cluster[cluster_id].y;
2237	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
2238
2239	#if BOOT_DEBUG_PERI
2240	_puts("\n[BOOT DEBUG] Peripherals initialisation in cluster[");
2241	_putd( x );
2242	_puts(",");
2243	_putd( y );
2244	_puts("]\n");
2245	#endif
2246
2247	// loop on peripherals
2248	for (periph_id = cluster[cluster_id].periph_offset;
2249	periph_id < cluster[cluster_id].periph_offset +
2250	cluster[cluster_id].periphs; periph_id++)
2251	{
2252	unsigned int type = periph[periph_id].type;
2253	unsigned int subtype = periph[periph_id].subtype;
2254	unsigned int channels = periph[periph_id].channels;
2255
2256	switch (type)
2257	{
2258	case PERIPH_TYPE_IOC: // vci_block_device component
2259	{
2260	if ( subtype == PERIPH_SUBTYPE_BDV )
2261	{
2262	_bdv_lock.value = 0;
2263	#if BOOT_DEBUG_PERI
2264	_puts("- BDV : channels = ");
2265	_putd(channels);
2266	_puts("\n");
2267	#endif
2268	}
2269	else if ( subtype == PERIPH_SUBTYPE_HBA )
2270	{
2271	// TODO
2272	}
2273	else if ( subtype == PERIPH_SUBTYPE_SPI )
2274	{
2275	// TODO
2276	}
2277	break;
2278	}
2279	case PERIPH_TYPE_CMA: // vci_chbuf_dma component
2280	{
2281	for (channel_id = 0; channel_id < channels; channel_id++)
2282	{
2283	// TODO
2284	}
2285	#if BOOT_DEBUG_PERI
2286	_puts("- CMA : channels = ");
2287	_putd(channels);
2288	_puts("\n");
2289	#endif
2290	break;
2291	}
2292	case PERIPH_TYPE_NIC: // vci_multi_nic component
2293	{
2294	for (channel_id = 0; channel_id < channels; channel_id++)
2295	{
2296	// TODO
2297	}
2298	#if BOOT_DEBUG_PERI
2299	_puts("- NIC : channels = ");
2300	_putd(channels);
2301	_puts("\n");
2302	#endif
2303	break;
2304	}
2305	case PERIPH_TYPE_TTY: // vci_multi_tty component
2306	{
2307	for (channel_id = 0; channel_id < channels; channel_id++)
2308	{
2309	_tty_lock[channel_id].value = 0;
2310	_tty_rx_full[channel_id] = 0;
2311	}
2312	#if BOOT_DEBUG_PERI
2313	_puts("- TTY : channels = ");
2314	_putd(channels);
2315	_puts("\n");
2316	#endif
2317	break;
2318	}
2319	case PERIPH_TYPE_IOB: // vci_io_bridge component
2320	{
2321	if (GIET_USE_IOMMU)
2322	{
2323	// TODO
2324	// get the iommu page table physical address
2325	// set IOMMU page table address
2326	// pseg_base[IOB_IOMMU_PTPR] = ptab_pbase;
2327	// activate IOMMU
2328	// pseg_base[IOB_IOMMU_ACTIVE] = 1;
2329	}
2330	break;
2331	}
2332	case PERIPH_TYPE_PIC: // vci_iopic component
2333	{
2334	#if BOOT_DEBUG_PERI
2335	_puts("- PIC : channels = ");
2336	_putd(channels);
2337	_puts("\n");
2338	#endif
2339	// scan all IRQs defined in mapping for PIC component,
2340	// and initialises addresses for WTI IRQs
2341	for ( channel_id = periph[periph_id].irq_offset ;
2342	channel_id < periph[periph_id].irq_offset + periph[periph_id].irqs ;
2343	channel_id++ )
2344	{
2345	unsigned int hwi_id = irq[channel_id].srcid; // HWI index in PIC
2346	unsigned int wti_id = irq[channel_id].dest_id; // WTI index in XCU
2347	unsigned int cluster_xy = irq[channel_id].dest_xy; // XCU coordinates
2348	unsigned int vaddr;
2349
2350	_xcu_get_wti_address( wti_id, &vaddr );
2351	_pic_init( hwi_id, vaddr, cluster_xy );
2352
2353	#if BOOT_DEBUG_PERI
2354	unsigned int address = _pic_get_register( channel_id, IOPIC_ADDRESS );
2355	unsigned int extend = _pic_get_register( channel_id, IOPIC_EXTEND );
2356	_puts(" hwi_index = ");
2357	_putd( hwi_id );
2358	_puts(" / wti_index = ");
2359	_putd( wti_id );
2360	_puts(" / vaddr = ");
2361	_putx( vaddr );
2362	_puts(" in cluster[");
2363	_putd( cluster_xy >> Y_WIDTH );
2364	_puts(",");
2365	_putd( cluster_xy & ((1<<Y_WIDTH)-1) );
2366	_puts("] / checked_xcu_paddr = ");
2367	_putl( (paddr_t)address + (((paddr_t)extend)<<32) );
2368	_puts("\n");
2369	#endif
2370	}
2371	break;
2372	}
2373	} // end switch periph type
2374	} // end for periphs
2375
2376	#if BOOT_DEBUG_PERI
2377	_puts("\n[BOOT DEBUG] Coprocessors initialisation in cluster[");
2378	_putd( x );
2379	_puts(",");
2380	_putd( y );
2381	_puts("]\n");
2382	#endif
2383
2384	// loop on coprocessors
2385	for ( coproc_id = cluster[cluster_id].coproc_offset;
2386	coproc_id < cluster[cluster_id].coproc_offset +
2387	cluster[cluster_id].coprocs; coproc_id++ )
2388	{
2389
2390	#if BOOT_DEBUG_PERI
2391	_puts("- coprocessor name : ");
2392	_puts(coproc[coproc_id].name);
2393	_puts(" / nb ports = ");
2394	_putd((unsigned int) coproc[coproc_id].ports);
2395	_puts("\n");
2396	#endif
2397	// loop on the coprocessor ports
2398	for ( cp_port_id = coproc[coproc_id].port_offset;
2399	cp_port_id < coproc[coproc_id].port_offset + coproc[coproc_id].ports;
2400	cp_port_id++ )
2401	{
2402	// get global index of associted vobj
2403	unsigned int vobj_id = cp_port[cp_port_id].mwmr_vobj_id;
2404
2405	// get MWMR channel base address
2406	page_table_t* ptab = (page_table_t*)_ptabs_vaddr[0][x][y];
2407	unsigned int vbase = vobj[vobj_id].vbase;
2408	unsigned int ppn;
2409	unsigned int flags;
2410	paddr_t pbase;
2411
2412	_v2p_translate( ptab,
2413	vbase>>12 ,
2414	&ppn,
2415	&flags );
2416
2417	pbase = ((paddr_t)ppn)<<12;
2418
2419	// initialise cp_port
2420	_mwr_hw_init( cluster_xy,
2421	cp_port_id,
2422	cp_port[cp_port_id].direction,
2423	pbase );
2424	#if BOOT_DEBUG_PERI
2425	_puts(" port direction: ");
2426	_putd( (unsigned int)cp_port[cp_port_id].direction );
2427	_puts(" / mwmr_channel_pbase = ");
2428	_putl( pbase );
2429	_puts(" / name = ");
2430	_puts(vobj[vobj_id].name);
2431	_puts("\n");
2432	#endif
2433	} // end for cp_ports
2434	} // end for coprocs
2435	} // end for clusters
2436	} // end boot_peripherals_init()
2437
2438	/////////////////////////////////////////////////////////////////////////
2439	// This function initialises the physical memory allocators in each
2440	// cluster containing a RAM pseg.
2441	/////////////////////////////////////////////////////////////////////////
2442	void boot_pmem_init()
2443	{
2444	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2445	mapping_cluster_t* cluster = _get_cluster_base(header);
2446	mapping_pseg_t* pseg = _get_pseg_base(header);
2447
2448	unsigned int cluster_id;
2449	unsigned int pseg_id;
2450
2451	// scan all clusters
2452	for ( cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++ )
2453	{
2454	// scan the psegs in cluster to find first pseg of type RAM
2455	unsigned int pseg_min = cluster[cluster_id].pseg_offset;
2456	unsigned int pseg_max = pseg_min + cluster[cluster_id].psegs;
2457	for ( pseg_id = pseg_min ; pseg_id < pseg_max ; pseg_id++ )
2458	{
2459	if ( pseg[pseg_id].type == PSEG_TYPE_RAM )
2460	{
2461	unsigned int x = cluster[cluster_id].x;
2462	unsigned int y = cluster[cluster_id].y;
2463	unsigned int base = (unsigned int)pseg[pseg_id].base;
2464	unsigned int size = (unsigned int)pseg[pseg_id].length;
2465	_pmem_alloc_init( x, y, base, size );
2466
2467	#if BOOT_DEBUG_PT
2468	_puts("\n[BOOT DEBUG] pmem allocator initialised in cluster[");
2469	_putd( x );
2470	_puts(",");
2471	_putd( y );
2472	_puts("] base = ");
2473	_putx( base );
2474	_puts(" / size = ");
2475	_putx( size );
2476	_puts("\n");
2477	#endif
2478	break;
2479	}
2480	}
2481	}
2482	} // end boot_pmem_init()
2483
2484	/////////////////////////////////////////////////////////////////////////
2485	// This function is the entry point of the boot code for all processors.
2486	// Most of this code is executed by Processor 0 only.
2487	/////////////////////////////////////////////////////////////////////////
2488	void boot_init()
2489	{
2490	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2491	mapping_cluster_t* cluster = _get_cluster_base(header);
2492	unsigned int gpid = _get_procid();
2493
2494	if ( gpid == 0 ) // only Processor 0 does it
2495	{
2496	_puts("\n[BOOT] boot_init start at cycle ");
2497	_putd(_get_proctime());
2498	_puts("\n");
2499
2500	// Load the map.bin file into memory and check it
2501	boot_mapping_init();
2502
2503	_puts("\n[BOOT] Mapping \"");
2504	_puts( header->name );
2505	_puts("\" loaded at cycle ");
2506	_putd(_get_proctime());
2507	_puts("\n");
2508
2509	// Initializes the physical memory allocators
2510	boot_pmem_init();
2511
2512	_puts("\n[BOOT] Physical memory allocators initialised at cycle ");
2513	_putd(_get_proctime());
2514	_puts("\n");
2515
2516	// Build page tables
2517	_ptabs_init();
2518
2519	_puts("\n[BOOT] Page tables initialised at cycle ");
2520	_putd(_get_proctime());
2521	_puts("\n");
2522
2523	// Activate MMU for proc [0,0,0]
2524	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0][0][0]>>13) );
2525	_set_mmu_mode( 0xF );
2526
2527	_puts("\n[BOOT] Processor[0,0,0] : MMU activation at cycle ");
2528	_putd(_get_proctime());
2529	_puts("\n");
2530
2531	// Initialise private vobjs in vspaces
2532	boot_vobjs_init();
2533
2534	_puts("\n[BOOT] Private vobjs initialised at cycle ");
2535	_putd(_get_proctime());
2536	_puts("\n");
2537
2538	// Initialise schedulers
2539	boot_schedulers_init();
2540
2541	_puts("\n[BOOT] Schedulers initialised at cycle ");
2542	_putd(_get_proctime());
2543	_puts("\n");
2544
2545	// Set CP0_SCHED register for proc [0,0,0]
2546	_set_sched( (unsigned int)_schedulers[0][0][0] );
2547
2548	// Initialise non replicated peripherals
2549	boot_peripherals_init();
2550
2551	_puts("\n[BOOT] Non replicated peripherals initialised at cycle ");
2552	_putd(_get_proctime());
2553	_puts("\n");
2554
2555	// Loading all .elf files
2556	boot_elf_load();
2557
2558	// P0 starts all other processors
2559	unsigned int clusterid, p;
2560
2561	for ( clusterid = 0 ; clusterid < X_SIZE*Y_SIZE ; clusterid++ )
2562	{
2563	unsigned int nprocs = cluster[clusterid].procs;
2564	unsigned int x = cluster[clusterid].x;
2565	unsigned int y = cluster[clusterid].y;
2566	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
2567
2568	for ( p = 0 ; p < nprocs; p++ )
2569	{
2570	if ( (nprocs > 0) && ((clusterid != 0) \|\| (p != 0)) )
2571	{
2572	_xcu_send_wti( cluster_xy, p, (unsigned int)boot_entry );
2573	}
2574	}
2575	}
2576
2577	} // end monoprocessor boot
2578
2579	///////////////////////////////////////////////////////////////////////////////
2580	// Parallel execution starts actually here
2581	///////////////////////////////////////////////////////////////////////////////
2582
2583	// all processor initialise the SCHED register
2584	// from the _schedulers[x][y][lpid array]
2585	unsigned int cluster_xy = gpid >> P_WIDTH;
2586	unsigned int lpid = gpid & ((1<<P_WIDTH)-1);
2587	unsigned int x = cluster_xy >> Y_WIDTH;
2588	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
2589	_set_sched( (unsigned int)_schedulers[x][y][lpid] );
2590
2591	// all processors (but Proc[0,0,0]) activate MMU
2592	if ( gpid != 0 )
2593	{
2594	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0][x][y]>>13) );
2595	_set_mmu_mode( 0xF );
2596	}
2597
2598	// all processors reset BEV bit in the status register to use
2599	// the GIET_VM exception handler instead of the PRELOADER exception handler
2600	_set_sr( 0 );
2601
2602	// all processors jump to kernel_init
2603	// using the address defined in the giet_vsegs.ld file
2604	unsigned int kernel_entry = (unsigned int)&kernel_init_vbase;
2605	asm volatile( "jr %0" ::"r"(kernel_entry) );
2606
2607	} // end boot_init()
2608
2609
2610	// Local Variables:
2611	// tab-width: 4
2612	// c-basic-offset: 4
2613	// c-file-offsets:((innamespace . 0)(inline-open . 0))
2614	// indent-tabs-mode: nil
2615	// End:
2616	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
2617

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