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source: soft/giet_vm/giet_boot/boot.c @ 304

Last change on this file since 304 was 299, checked in by alain, 11 years ago
ntroducing the TOTAL_PROCS variable in the hard_config.h file (used by the synchronisation barrier in kernel_init.c)
File size: 78.7 KB

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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, but the
11	// physicals addresses can have up to 40 bits, and use the (unsigned long long) type.
12	// It natively supports clusterised shared mmemory 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 is executed in the boot phase by proc[0] and performs the following tasks:
17	// - load into memory the giet_vm binary files, contained in 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).
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: placement 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, when we want to control the placement
41	// of the software objects (virtual segments) on the physical memory banks.
42	//
43	// The page table are statically build in the boot phase, and they do not
44	// change during execution. The GIET uses only 4 Kbytes pages.
45	// As most applications use only a limited number of segments, the number of PT2s
46	// actually used by a given virtual space is generally smaller than 2048, and is
47	// computed during the boot phase.
48	// The max number of virtual spaces (GIET_NB_VSPACE_MAX) is a configuration parameter.
49	//
50	// Each page table (one page table per virtual space) is monolithic, and contains
51	// one PT1 and up to (GIET_NB_PT2_MAX) PT2s. The PT1 is addressed using the ix1 field
52	// (11 bits) of the VPN, and the selected PT2 is addressed using the ix2 field (9 bits).
53	// - PT1[2048] : a first 8K aligned array of unsigned int, indexed by (ix1) field of VPN.
54	// Each entry in the PT1 contains a 32 bits PTD. The MSB bit PTD[31] is
55	// the PTD valid bit, and LSB bits PTD[19:0] are the 20 MSB bits of the physical base
56	// address of the selected PT2.
57	// The PT1 contains 2048 PTD of 4 bytes => 8K bytes.
58	// - PT2[1024][GIET_NB_PT2_MAX] : an array of array of unsigned int.
59	// Each PT2[1024] must be 4K aligned, each entry in a PT2 contains two unsigned int:
60	// the first word contains the protection flags, and the second word contains the PPN.
61	// Each PT2 contains 512 PTE2 of 8bytes => 4K bytes.
62	// The total size of a page table is finally = 8K + (GIET_NB_PT2_MAX)*4K bytes.
63	///////////////////////////////////////////////////////////////////////////////////////
64	// Implementation Notes:
65	//
66	// 1) The cluster_id variable is a linear index in the mapping_info array of clusters.
67	// We use the cluster_xy variable for the tological index = x << Y_WIDTH + y
68	///////////////////////////////////////////////////////////////////////////////////////
69
70	#include <giet_config.h>
71	#include <mwmr_channel.h>
72	#include <barrier.h>
73	#include <memspace.h>
74	#include <tty_driver.h>
75	#include <xcu_driver.h>
76	#include <ioc_driver.h>
77	#include <dma_driver.h>
78	#include <cma_driver.h>
79	#include <nic_driver.h>
80	#include <ioc_driver.h>
81	#include <iob_driver.h>
82	#include <pic_driver.h>
83	#include <mwr_driver.h>
84	#include <ctx_handler.h>
85	#include <irq_handler.h>
86	#include <vmem.h>
87	#include <utils.h>
88	#include <elf-types.h>
89
90	// for boot FAT initialisation
91	#include <fat32.h>
92
93	#include <mips32_registers.h>
94	#include <stdarg.h>
95
96	#if !defined(X_SIZE)
97	# error The X_SIZE value must be defined in the 'hard_config.h' file !
98	#endif
99
100	#if !defined(Y_SIZE)
101	# error The Y_SIZE value must be defined in the 'hard_config.h' file !
102	#endif
103
104	#if !defined(X_WIDTH)
105	# error The X_WIDTH value must be defined in the 'hard_config.h' file !
106	#endif
107
108	#if !defined(Y_WIDTH)
109	# error The Y_WIDTH value must be defined in the 'hard_config.h' file !
110	#endif
111
112	#if !defined(NB_PROCS_MAX)
113	# error The NB_PROCS_MAX value must be defined in the 'hard_config.h' file !
114	#endif
115
116	#if !defined(GIET_NB_VSPACE_MAX)
117	# error The GIET_NB_VSPACE_MAX value must be defined in the 'giet_config.h' file !
118	#endif
119
120	////////////////////////////////////////////////////////////////////////////
121	// Global variables for boot code
122	// Both the page tables for the various virtual spaces, and the schedulers
123	// for the processors are physically distributed on the clusters.
124	// These global variables are just arrays of pointers.
125	////////////////////////////////////////////////////////////////////////////
126
127	// This global variable is allocated in "fat32.c" file
128	extern fat32_fs_t fat;
129
130	// Page table addresses arrays
131	__attribute__((section (".bootdata")))
132	paddr_t _ptabs_paddr[GIET_NB_VSPACE_MAX];
133
134	__attribute__((section (".bootdata")))
135	unsigned int _ptabs_vaddr[GIET_NB_VSPACE_MAX];
136
137	// Next free PT2 index array
138	__attribute__((section (".bootdata")))
139	unsigned int _next_free_pt2[GIET_NB_VSPACE_MAX] =
140	{ [0 ... GIET_NB_VSPACE_MAX - 1] = 0 };
141
142	// Max PT2 index
143	__attribute__((section (".bootdata")))
144	unsigned int _max_pt2[GIET_NB_VSPACE_MAX] =
145	{ [0 ... GIET_NB_VSPACE_MAX - 1] = 0 };
146
147	// Scheduler pointers array (virtual addresses)
148	// indexed by (x,y,lpid) : ((x << Y_WIDTH) + y)*NB_PROCS_MAX + lpid
149	__attribute__((section (".bootdata")))
150	static_scheduler_t* _schedulers[NB_PROCS_MAX<<(X_WIDTH+Y_WIDTH)];
151
152
153	/////////////////////////////////////////////////////////////////////
154	// This function checks consistence beween the mapping_info data
155	// structure (soft), and the giet_config file (hard).
156	/////////////////////////////////////////////////////////////////////
157	void boot_mapping_check()
158	{
159	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
160
161	// checking mapping availability
162	if (header->signature != IN_MAPPING_SIGNATURE)
163	{
164	_puts("\n[BOOT ERROR] Illegal mapping signature: ");
165	_putx(header->signature);
166	_puts("\n");
167	_exit();
168	}
169
170	// checking number of clusters
171	if ( (header->x_size != X_SIZE) \|\|
172	(header->y_size != Y_SIZE) \|\|
173	(header->x_width != X_WIDTH) \|\|
174	(header->y_width != Y_WIDTH) )
175	{
176	_puts("\n[BOOT ERROR] Incoherent X_SIZE or Y_SIZE ");
177	_puts("\n - In hard_config: X_SIZE = ");
178	_putd( X_SIZE );
179	_puts(" / Y_SIZE = ");
180	_putd( Y_SIZE );
181	_puts(" / X_WIDTH = ");
182	_putd( X_WIDTH );
183	_puts(" / Y_WIDTH = ");
184	_putd( Y_WIDTH );
185	_puts("\n - In mapping_info: x_size = ");
186	_putd( header->x_size );
187	_puts(" / y_size = ");
188	_putd( header->y_size );
189	_puts(" / x_width = ");
190	_putd( header->x_width );
191	_puts(" / y_width = ");
192	_putd( header->y_width );
193	_puts("\n");
194	_exit();
195	}
196	// checking number of virtual spaces
197	if (header->vspaces > GIET_NB_VSPACE_MAX)
198	{
199	_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n");
200	_puts("\n");
201	_exit();
202	}
203
204	#if BOOT_DEBUG_MAPPING
205	_puts("\n - x_size = ");
206	_putd( header->x_size );
207	_puts("\n - y_size = ");
208	_putd( header->y_size );
209	_puts("\n - procs = ");
210	_putd( header->procs );
211	_puts("\n - periphs = ");
212	_putd( header->periphs );
213	_puts("\n - vspaces = ");
214	_putd( header->vspaces );
215	_puts("\n - tasks = ");
216	_putd( header->tasks );
217	_puts("\n");
218	_puts("\n - size of header = ");
219	_putd( MAPPING_HEADER_SIZE );
220	_puts("\n - size of cluster = ");
221	_putd( MAPPING_CLUSTER_SIZE );
222	_puts("\n - size of pseg = ");
223	_putd( MAPPING_PSEG_SIZE );
224	_puts("\n - size of proc = ");
225	_putd( MAPPING_PROC_SIZE );
226	_puts("\n - size of vspace = ");
227	_putd( MAPPING_VSPACE_SIZE );
228	_puts("\n - size of vseg = ");
229	_putd( MAPPING_VSEG_SIZE );
230	_puts("\n - size of vobj = ");
231	_putd( MAPPING_VOBJ_SIZE );
232	_puts("\n - size of task = ");
233	_putd( MAPPING_TASK_SIZE );
234	_puts("\n");
235
236	unsigned int cluster_id;
237	mapping_cluster_t * cluster = _get_cluster_base(header);
238	for( cluster_id = 0; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
239	{
240	_puts("\n - cluster[");
241	_putd( cluster[cluster_id].x );
242	_puts(",");
243	_putd( cluster[cluster_id].y );
244	_puts("]\n procs = ");
245	_putd( cluster[cluster_id].procs );
246	_puts("\n psegs = ");
247	_putd( cluster[cluster_id].psegs );
248	_puts("\n periphs = ");
249	_putd( cluster[cluster_id].periphs );
250	_puts("\n");
251	}
252	#endif
253
254	} // end boot_mapping_check()
255
256
257	//////////////////////////////////////////////////////////////////////////////
258	// boot_pseg_get()
259	// This function returns the pointer on a physical segment
260	// identified by the pseg index.
261	//////////////////////////////////////////////////////////////////////////////
262	mapping_pseg_t *boot_pseg_get(unsigned int seg_id)
263	{
264	mapping_header_t* header = (mapping_header_t*)(&seg_boot_mapping_base);
265	mapping_pseg_t * pseg = _get_pseg_base(header);
266
267	// checking argument
268	if (seg_id >= header->psegs)
269	{
270	_puts("\n[BOOT ERROR] : seg_id argument too large\n");
271	_puts(" in function boot_pseg_get()\n");
272	_exit();
273	}
274
275	return &pseg[seg_id];
276	}
277
278	//////////////////////////////////////////////////////////////////////////////
279	// boot_add_pte()
280	// This function registers a new PTE in the page table defined
281	// by the vspace_id argument, and updates both PT1 and PT2.
282	// A new PT2 is used when required.
283	// As the set of PT2s is implemented as a fixed size array (no dynamic
284	// allocation), this function checks a possible overflow of the PT2 array.
285	//////////////////////////////////////////////////////////////////////////////
286	void boot_add_pte(unsigned int vspace_id,
287	unsigned int vpn,
288	unsigned int flags,
289	unsigned int ppn,
290	unsigned int verbose)
291	{
292	unsigned int ix1;
293	unsigned int ix2;
294	paddr_t pt1_pbase; // PT1 physical base address
295	paddr_t pt2_pbase; // PT2 physical base address
296	paddr_t pte_paddr; // PTE physucal address
297	unsigned int pt2_id; // PT2 index
298	unsigned int ptd; // PTD : entry in PT1
299	unsigned int max_pt2; // max number of PT2s for a given vspace
300
301	ix1 = vpn >> 9; // 11 bits
302	ix2 = vpn & 0x1FF; // 9 bits
303
304	// check that the _max_pt2[vspace_id] has been set
305	max_pt2 = _max_pt2[vspace_id];
306
307	if (max_pt2 == 0)
308	{
309	_puts("Undefined page table for vspace ");
310	_putd(vspace_id);
311	_puts("\n");
312	_exit();
313	}
314
315
316	// get page table physical base address
317	pt1_pbase = _ptabs_paddr[vspace_id];
318
319	// get ptd in PT1
320	ptd = _physical_read(pt1_pbase + 4 * ix1);
321
322	if ((ptd & PTE_V) == 0) // invalid PTD: compute PT2 base address,
323	// and set a new PTD in PT1
324	{
325	pt2_id = _next_free_pt2[vspace_id];
326	if (pt2_id == max_pt2)
327	{
328	_puts("\n[BOOT ERROR] in boot_add_pte() function\n");
329	_puts("the length of the ptab vobj is too small\n");
330
331	_puts(" max_pt2 = ");
332	_putd( max_pt2 );
333	_puts("\n");
334	_puts(" pt2_id = ");
335	_putd( pt2_id );
336	_puts("\n");
337
338	_exit();
339	}
340	else
341	{
342	pt2_pbase = pt1_pbase + PT1_SIZE + PT2_SIZE * pt2_id;
343	ptd = PTE_V \| PTE_T \| (unsigned int) (pt2_pbase >> 12);
344	_physical_write( pt1_pbase + 4 * ix1, ptd);
345	_next_free_pt2[vspace_id] = pt2_id + 1;
346	}
347	}
348	else // valid PTD: compute PT2 base address
349	{
350	pt2_pbase = ((paddr_t)(ptd & 0x0FFFFFFF)) << 12;
351	}
352
353	// set PTE in PT2 : flags & PPN in two 32 bits words
354	pte_paddr = pt2_pbase + 8 * ix2;
355	_physical_write(pte_paddr , flags);
356	_physical_write(pte_paddr + 4, ppn);
357
358	if (verbose)
359	{
360	_puts(" / vpn = ");
361	_putx( vpn );
362	_puts(" / ix1 = ");
363	_putx( ix1 );
364	_puts(" / ix2 = ");
365	_putx( ix2 );
366	_puts(" / pt1_pbase = ");
367	_putl( pt1_pbase );
368	_puts(" / ptd = ");
369	_putl( ptd );
370	_puts(" / pt2_pbase = ");
371	_putl( pt2_pbase );
372	_puts(" / pte_paddr = ");
373	_putl( pte_paddr );
374	_puts(" / ppn = ");
375	_putx( ppn );
376	_puts("/\n");
377	}
378
379	} // end boot_add_pte()
380
381
382	/////////////////////////////////////////////////////////////////////
383	// This function build the page table for a given vspace.
384	// The physical base addresses for all vsegs (global and private)
385	// must have been previously computed and stored in the mapping.
386	// It initializes the MWMR channels.
387	/////////////////////////////////////////////////////////////////////
388	void boot_vspace_pt_build(unsigned int vspace_id)
389	{
390	unsigned int vseg_id;
391	unsigned int npages;
392	unsigned int ppn;
393	unsigned int vpn;
394	unsigned int flags;
395	unsigned int page_id;
396	unsigned int verbose = 0; // can be used to activate trace in add_pte()
397
398	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
399	mapping_vspace_t * vspace = _get_vspace_base(header);
400	mapping_vseg_t * vseg = _get_vseg_base(header);
401
402	// private segments
403	for (vseg_id = vspace[vspace_id].vseg_offset;
404	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
405	vseg_id++)
406	{
407	vpn = vseg[vseg_id].vbase >> 12;
408	ppn = (unsigned int) (vseg[vseg_id].pbase >> 12);
409
410	npages = vseg[vseg_id].length >> 12;
411	if ((vseg[vseg_id].length & 0xFFF) != 0) npages++;
412
413	flags = PTE_V;
414	if (vseg[vseg_id].mode & C_MODE_MASK) flags = flags \| PTE_C;
415	if (vseg[vseg_id].mode & X_MODE_MASK) flags = flags \| PTE_X;
416	if (vseg[vseg_id].mode & W_MODE_MASK) flags = flags \| PTE_W;
417	if (vseg[vseg_id].mode & U_MODE_MASK) flags = flags \| PTE_U;
418
419	#if BOOT_DEBUG_PT
420	_puts(vseg[vseg_id].name);
421	_puts(" : flags = ");
422	_putx(flags);
423	_puts(" / npages = ");
424	_putd(npages);
425	_puts(" / pbase = ");
426	_putl(vseg[vseg_id].pbase);
427	_puts("\n");
428	#endif
429	// loop on 4K pages
430	for (page_id = 0; page_id < npages; page_id++)
431	{
432	boot_add_pte(vspace_id, vpn, flags, ppn, verbose);
433	vpn++;
434	ppn++;
435	}
436	}
437
438	// global segments
439	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
440	{
441	vpn = vseg[vseg_id].vbase >> 12;
442	ppn = (unsigned int)(vseg[vseg_id].pbase >> 12);
443	npages = vseg[vseg_id].length >> 12;
444	if ((vseg[vseg_id].length & 0xFFF) != 0) npages++;
445
446	flags = PTE_V;
447	if (vseg[vseg_id].mode & C_MODE_MASK) flags = flags \| PTE_C;
448	if (vseg[vseg_id].mode & X_MODE_MASK) flags = flags \| PTE_X;
449	if (vseg[vseg_id].mode & W_MODE_MASK) flags = flags \| PTE_W;
450	if (vseg[vseg_id].mode & U_MODE_MASK) flags = flags \| PTE_U;
451
452	#if BOOT_DEBUG_PT
453	_puts(vseg[vseg_id].name);
454	_puts(" : flags = ");
455	_putx(flags);
456	_puts(" / npages = ");
457	_putd(npages);
458	_puts(" / pbase = ");
459	_putl(vseg[vseg_id].pbase);
460	_puts("\n");
461	#endif
462	// loop on 4K pages
463	for (page_id = 0; page_id < npages; page_id++)
464	{
465	boot_add_pte(vspace_id, vpn, flags, ppn, verbose);
466	vpn++;
467	ppn++;
468	}
469	}
470	} // end boot_vspace_pt_build()
471
472
473	///////////////////////////////////////////////////////////////////////////
474	// Align the value of paddr or vaddr to the required alignement,
475	// defined by alignPow2 == L2(alignement).
476	///////////////////////////////////////////////////////////////////////////
477	paddr_t paddr_align_to(paddr_t paddr, unsigned int alignPow2)
478	{
479	paddr_t mask = (1 << alignPow2) - 1;
480	return ((paddr + mask) & ~mask);
481	}
482
483	unsigned int vaddr_align_to(unsigned int vaddr, unsigned int alignPow2)
484	{
485	unsigned int mask = (1 << alignPow2) - 1;
486	return ((vaddr + mask) & ~mask);
487	}
488
489	///////////////////////////////////////////////////////////////////////////
490	// Set pbase for a vseg when identity mapping is required.
491	// The length of the vseg must be known.
492	// The ordered linked list of vsegs mapped on pseg must be updated,
493	// and overlap with previously mapped vsegs must be checked.
494	///////////////////////////////////////////////////////////////////////////
495	void boot_vseg_set_paddr_ident(mapping_vseg_t * vseg)
496	{
497	// checking vseg not already mapped
498	if (vseg->mapped != 0)
499	{
500	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
501	_puts( vseg->name );
502	_puts(" already mapped\n");
503	_exit();
504	}
505
506	// computes selected pseg pointer
507	mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid );
508
509	// computes vseg alignment constraint
510	mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base;
511	mapping_vobj_t* vobj_base = _get_vobj_base( header );
512	unsigned int align = vobj_base[vseg->vobj_offset].align;
513	if ( vobj_base[vseg->vobj_offset].align < 12 ) align = 12;
514
515	// computes required_pbase for identity mapping,
516	paddr_t required_pbase = (paddr_t)vseg->vbase;
517
518	// checks identity constraint against alignment constraint
519	if ( paddr_align_to( required_pbase, align) != required_pbase )
520	{
521	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
522	_puts( vseg->name );
523	_puts(" has uncompatible identity and alignment constraints\n");
524	_exit();
525	}
526
527	// We are looking for a contiguous space in target pseg.
528	// If there is vsegs already mapped, we scan the vsegs list to:
529	// - check overlap with already mapped vsegs,
530	// - try mapping in holes between already mapped vsegs,
531	// - update the ordered linked list if success
532	// We don't enter the loop if no vsegs is already mapped.
533	// implementation note: The next_vseg field is unsigned int,
534	// but we use it to store a MIP32 pointer on a vseg...
535
536	mapping_vseg_t* curr = 0;
537	mapping_vseg_t* prev = 0;
538	unsigned int min_pbase = pseg->base;
539
540	for ( curr = (mapping_vseg_t*)pseg->next_vseg ;
541	(curr != 0) && (vseg->mapped == 0) ;
542	curr = (mapping_vseg_t*)curr->next_vseg )
543	{
544	// looking before current vseg
545	if( (required_pbase >= min_pbase) &&
546	(curr->pbase >= (required_pbase + vseg->length)) ) // space found
547	{
548	vseg->pbase = required_pbase;
549	vseg->mapped = 1;
550
551	// update linked list
552	vseg->next_vseg = (unsigned int)curr;
553	if( curr == (mapping_vseg_t*)pseg->next_vseg )
554	pseg->next_vseg = (unsigned int)vseg;
555	else
556	prev->next_vseg = (unsigned int)vseg;
557	}
558	else // looking in space after curr
559	{
560	prev = curr;
561	min_pbase = curr->pbase + curr->length;
562	}
563	}
564
565	// no success in the loop
566	if( (vseg->mapped == 0) &&
567	(required_pbase >= min_pbase) &&
568	((required_pbase + vseg->length) <= (pseg->base + pseg->length)) )
569	{
570	vseg->pbase = required_pbase;
571	vseg->mapped = 1;
572
573	// update linked list
574	vseg->next_vseg = 0;
575	if ((curr == 0) && (prev == 0)) pseg->next_vseg = (unsigned int)vseg;
576	else prev->next_vseg = (unsigned int)vseg;
577	}
578
579	if( vseg->mapped == 0 )
580	{
581	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
582	_puts( vseg->name );
583	_puts(" cannot be mapped on pseg ");
584	_puts( pseg->name );
585	_puts("\n");
586	_exit();
587	}
588	} // end boot_vseg_set_paddr_ident()
589
590
591	////////////////////////////////////////////////////////////////////////////
592	// Set pbase for a vseg when there is no identity mapping constraint.
593	// This is the physical memory allocator (written by Q.Meunier).
594	// The length of the vseg must be known.
595	// All identity mapping vsegs must be already mapped.
596	// We use a linked list of already mapped vsegs, ordered by incresing pbase.
597	// We try to place the vseg in the "first fit" hole in this list.
598	////////////////////////////////////////////////////////////////////////////
599	void boot_vseg_set_paddr(mapping_vseg_t * vseg)
600	{
601	// checking vseg not already mapped
602	if ( vseg->mapped != 0 )
603	{
604	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr() : vseg ");
605	_puts( vseg->name );
606	_puts(" already mapped\n");
607	_exit();
608	}
609
610	// computes selected pseg pointer
611	mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid );
612
613	// computes vseg alignment constraint
614	mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base;
615	mapping_vobj_t* vobj_base = _get_vobj_base( header );
616	unsigned int align = vobj_base[vseg->vobj_offset].align;
617	if ( vobj_base[vseg->vobj_offset].align < 12 ) align = 12;
618
619	// initialise physical base address, with alignment constraint
620	paddr_t possible_pbase = paddr_align_to( pseg->base, align );
621
622	// We are looking for a contiguous space in target pseg
623	// If there is vsegs already mapped, we scan the vsegs list to:
624	// - try mapping in holes between already mapped vsegs,
625	// - update the ordered linked list if success
626	// We don't enter the loop if no vsegs is already mapped.
627	// implementation note: The next_vseg field is unsigned int,
628	// but we use it to store a MIP32 pointer on a vseg...
629
630	mapping_vseg_t* curr = 0;
631	mapping_vseg_t* prev = 0;
632
633	for( curr = (mapping_vseg_t*)pseg->next_vseg ;
634	(curr != 0) && (vseg->mapped == 0) ;
635	curr = (mapping_vseg_t*)curr->next_vseg )
636	{
637	// looking for space before current vseg
638	if ( (curr->pbase >= possible_pbase + vseg->length) ) // space before curr
639	{
640	vseg->pbase = possible_pbase;
641	vseg->mapped = 1;
642
643	// update linked list
644	vseg->next_vseg = (unsigned int)curr;
645	if( curr == (mapping_vseg_t*)pseg->next_vseg )
646	pseg->next_vseg = (unsigned int)vseg;
647	else
648	prev->next_vseg = (unsigned int)vseg;
649	}
650	else // looking for space after curr
651	{
652	possible_pbase = paddr_align_to( curr->pbase + curr->length, align );
653	prev = curr;
654	}
655	}
656
657	// when no space found, try to allocate space after already mapped vsegs
658	if( (vseg->mapped == 0) &&
659	((possible_pbase + vseg->length) <= (pseg->base + pseg->length)) )
660	{
661	vseg->pbase = possible_pbase;
662	vseg->mapped = 1;
663
664	// update linked list
665	vseg->next_vseg = 0;
666	if ((curr == 0 ) && (prev == 0)) pseg->next_vseg = (unsigned int)vseg;
667	else prev->next_vseg = (unsigned int)vseg;
668	}
669
670	if( vseg->mapped == 0 )
671	{
672	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr() : vseg ");
673	_puts( vseg->name );
674	_puts(" cannot be mapped on pseg ");
675	_puts( pseg->name );
676	_puts("\n");
677	_exit();
678	}
679	} // end boot_vseg_set_paddr()
680
681	///////////////////////////////////////////////////////////////////////////
682	// This function computes the physical base address for a vseg
683	// as specified in the mapping info data structure.
684	// It updates the pbase and the length fields of the vseg.
685	// It updates the pbase and vbase fields of all vobjs in the vseg.
686	// It updates the _ptabs_paddr[] and _ptabs_vaddr[] arrays.
687	// It is a global vseg if vspace_id = (-1).
688	///////////////////////////////////////////////////////////////////////////
689	void boot_vseg_map(mapping_vseg_t * vseg, unsigned int vspace_id)
690	{
691	unsigned int vobj_id;
692	unsigned int cur_vaddr;
693	paddr_t cur_paddr;
694	paddr_t cur_length;
695	unsigned int offset;
696
697	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
698	mapping_vobj_t * vobj = _get_vobj_base(header);
699
700	// loop on the vobjs contained in vseg to compute
701	// the vseg length, required for mapping.
702	cur_length = 0;
703	for ( vobj_id = vseg->vobj_offset;
704	vobj_id < (vseg->vobj_offset + vseg->vobjs);
705	vobj_id++ )
706	{
707	if (vobj[vobj_id].align)
708	{
709	cur_length = vaddr_align_to(cur_length, vobj[vobj_id].align);
710	}
711	cur_length += vobj[vobj_id].length;
712	}
713	vseg->length = paddr_align_to(cur_length, 12);
714
715	// mapping: computes vseg pbase address
716	if (vseg->ident != 0) // identity mapping
717	{
718	boot_vseg_set_paddr_ident( vseg );
719	}
720	else // unconstrained mapping
721	{
722	boot_vseg_set_paddr( vseg );
723	}
724
725	// second loop on vobjs contained in vseg to :
726	// initialize the vaddr and paddr fields of all vobjs,
727	// and initialize the page table pointers arrays
728
729	cur_vaddr = vseg->vbase;
730	cur_paddr = vseg->pbase;
731
732	for (vobj_id = vseg->vobj_offset;
733	vobj_id < (vseg->vobj_offset + vseg->vobjs); vobj_id++)
734	{
735	if (vobj[vobj_id].align)
736	{
737	cur_paddr = paddr_align_to(cur_paddr, vobj[vobj_id].align);
738	cur_vaddr = vaddr_align_to(cur_vaddr, vobj[vobj_id].align);
739	}
740	// set vaddr/paddr for current vobj
741	vobj[vobj_id].vaddr = cur_vaddr;
742	vobj[vobj_id].paddr = cur_paddr;
743
744	// initialize _ptabs_vaddr[] & boot_ptabs-paddr[] if PTAB
745	if (vobj[vobj_id].type == VOBJ_TYPE_PTAB)
746	{
747	if (vspace_id == ((unsigned int) -1)) // global vseg
748	{
749	_puts("\n[BOOT ERROR] in boot_vseg_map() function: ");
750	_puts("a PTAB vobj cannot be global");
751	_exit();
752	}
753	// we need at least one PT2
754	if (vobj[vobj_id].length < (PT1_SIZE + PT2_SIZE))
755	{
756	_puts("\n[BOOT ERROR] in boot_vseg_map() function, ");
757	_puts("PTAB too small, minumum size is: ");
758	_putx(PT1_SIZE + PT2_SIZE);
759	_exit();
760	}
761	// register both physical and virtual page table address
762	_ptabs_vaddr[vspace_id] = vobj[vobj_id].vaddr;
763	_ptabs_paddr[vspace_id] = vobj[vobj_id].paddr;
764
765	// reset all valid bits in PT1
766	for ( offset = 0 ; offset < 8192 ; offset = offset + 4)
767	{
768	_physical_write(cur_paddr + offset, 0);
769	}
770
771	// computing the number of second level pages
772	_max_pt2[vspace_id] = (vobj[vobj_id].length - PT1_SIZE) / PT2_SIZE;
773	}
774
775	// set next vaddr/paddr
776	cur_vaddr = cur_vaddr + vobj[vobj_id].length;
777	cur_paddr = cur_paddr + vobj[vobj_id].length;
778	} // end for vobjs
779
780	} // end boot_vseg_map()
781
782	/////////////////////////////////////////////////////////////////////
783	// This function builds the page tables for all virtual spaces
784	// defined in the mapping_info data structure, in three steps:
785	// - step 1 : It computes the physical base address for global vsegs
786	// and for all associated vobjs.
787	// - step 2 : It computes the physical base address for all private
788	// vsegs and all vobjs in each virtual space.
789	// - step 3 : It actually fill the page table for each vspace.
790	//
791	// Note: It must exist at least one vspace in the mapping_info...
792	/////////////////////////////////////////////////////////////////////
793	void boot_pt_init()
794	{
795	mapping_header_t * header = (mapping_header_t *) &seg_boot_mapping_base;
796	mapping_vspace_t * vspace = _get_vspace_base(header);
797	mapping_vseg_t * vseg = _get_vseg_base(header);
798
799	unsigned int vspace_id;
800	unsigned int vseg_id;
801
802	if (header->vspaces == 0 )
803	{
804	_puts("\n[BOOT ERROR] in boot_pt_init() : mapping ");
805	_puts( header->name );
806	_puts(" contains no vspace\n");
807	_exit();
808	}
809
810	#if BOOT_DEBUG_PT
811	_puts("\n[BOOT DEBUG] **** mapping global vsegs ****\n");
812	#endif
813
814	// step 1 : loop on global vsegs
815
816	// vsegs with identity mapping constraint first
817	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
818	{
819	if (vseg[vseg_id].ident == 1)
820	boot_vseg_map(&vseg[vseg_id], ((unsigned int) (-1)));
821	}
822
823	// unconstrained vsegs second
824	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
825	{
826	if (vseg[vseg_id].ident == 0)
827	boot_vseg_map(&vseg[vseg_id], ((unsigned int) (-1)));
828	}
829
830	// step 2 : loop on virtual vspaces to map private vsegs
831	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
832	{
833
834	#if BOOT_DEBUG_PT
835	_puts("\n[BOOT DEBUG] ****** mapping private vsegs in vspace ");
836	_puts(vspace[vspace_id].name);
837	_puts(" ******\n");
838	#endif
839
840	// vsegs with identity mapping constraint first
841	for (vseg_id = vspace[vspace_id].vseg_offset;
842	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
843	vseg_id++)
844	{
845	if (vseg[vseg_id].ident == 1)
846	boot_vseg_map(&vseg[vseg_id], vspace_id);
847	}
848	// unconstrained vsegs second
849	for (vseg_id = vspace[vspace_id].vseg_offset;
850	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
851	vseg_id++)
852	{
853	if (vseg[vseg_id].ident == 0)
854	boot_vseg_map(&vseg[vseg_id], vspace_id);
855	}
856	}
857
858	#if BOOT_DEBUG_PT
859	mapping_vseg_t* curr;
860	mapping_pseg_t* pseg = _get_pseg_base(header);
861	unsigned int pseg_id;
862	for( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ )
863	{
864	_puts("\n[BOOT DEBUG] ****** vsegs mapped on pseg ");
865	_puts( pseg[pseg_id].name );
866	_putd( pseg[pseg_id].clusterid);
867	_puts(" ******\n");
868	for( curr = (mapping_vseg_t*)pseg[pseg_id].next_vseg ;
869	curr != 0 ;
870	curr = (mapping_vseg_t*)curr->next_vseg )
871	{
872	_puts(" - vseg ");
873	_puts( curr->name );
874	_puts(" : len = ");
875	_putx( curr->length );
876	_puts(" / vbase ");
877	_putx( curr->vbase );
878	_puts(" / pbase ");
879	_putl( curr->pbase );
880	_puts("\n");
881	}
882	}
883	#endif
884
885	// step 3 : loop on the vspaces to build the page tables
886	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
887	{
888
889	#if BOOT_DEBUG_PT
890	_puts("\n[BOOT DEBUG] ****** building page table for vspace ");
891	_puts(vspace[vspace_id].name);
892	_puts(" ******\n");
893	#endif
894
895	boot_vspace_pt_build(vspace_id);
896
897	_puts("\n[BOOT] Page Table for vspace \"");
898	_puts( vspace[vspace_id].name );
899	_puts("\" completed at cycle ");
900	_putd( _get_proctime() );
901	_puts("\n");
902
903	#if BOOT_DEBUG_PT
904	_puts(" vaddr = ");
905	_putx( _ptabs_vaddr[vspace_id] );
906	_puts(" / paddr = ");
907	_putl( _ptabs_paddr[vspace_id] );
908	_puts(" / PT2 number = ");
909	_putd( _max_pt2[vspace_id] );
910	_puts("\n");
911	#endif
912	}
913	} // end boot_pt_init()
914
915	///////////////////////////////////////////////////////////////////////////////
916	// This function initializes all private vobjs defined in the vspaces,
917	// such as mwmr channels, barriers and locks, because these vobjs
918	// are not known, and not initialized by the compiler.
919	// The MMU is supposed to be activated...
920	///////////////////////////////////////////////////////////////////////////////
921	void boot_vobjs_init()
922	{
923	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
924	mapping_vspace_t* vspace = _get_vspace_base(header);
925	mapping_vobj_t* vobj = _get_vobj_base(header);
926
927	unsigned int vspace_id;
928	unsigned int vobj_id;
929
930	// loop on the vspaces
931	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
932	{
933
934	#if BOOT_DEBUG_VOBJS
935	_puts("\n[BOOT DEBUG] ****** vobjs initialisation in vspace ");
936	_puts(vspace[vspace_id].name);
937	_puts(" ******\n");
938	#endif
939
940	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id] >> 13) );
941
942	unsigned int ptab_found = 0;
943
944	// loop on the vobjs
945	for (vobj_id = vspace[vspace_id].vobj_offset;
946	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
947	vobj_id++)
948	{
949	switch (vobj[vobj_id].type)
950	{
951	case VOBJ_TYPE_MWMR: // storage capacity is (vobj.length/4 - 5) words
952	{
953	mwmr_channel_t* mwmr = (mwmr_channel_t *) (vobj[vobj_id].vaddr);
954	mwmr->ptw = 0;
955	mwmr->ptr = 0;
956	mwmr->sts = 0;
957	mwmr->width = vobj[vobj_id].init;
958	mwmr->depth = (vobj[vobj_id].length >> 2) - 6;
959	mwmr->lock = 0;
960	#if BOOT_DEBUG_VOBJS
961	_puts("MWMR : ");
962	_puts(vobj[vobj_id].name);
963	_puts(" / depth = ");
964	_putd(mwmr->depth);
965	_puts(" / width = ");
966	_putd(mwmr->width);
967	_puts("\n");
968	#endif
969	break;
970	}
971	case VOBJ_TYPE_ELF: // initialisation done by the loader
972	{
973	#if BOOT_DEBUG_VOBJS
974	_puts("ELF : ");
975	_puts(vobj[vobj_id].name);
976	_puts(" / length = ");
977	_putx(vobj[vobj_id].length);
978	_puts("\n");
979	#endif
980	break;
981	}
982	case VOBJ_TYPE_BLOB: // initialisation done by the loader
983	{
984	#if BOOT_DEBUG_VOBJS
985	_puts("BLOB : ");
986	_puts(vobj[vobj_id].name);
987	_puts(" / length = ");
988	_putx(vobj[vobj_id].length);
989	_puts("\n");
990	#endif
991	break;
992	}
993	case VOBJ_TYPE_BARRIER: // init is the number of participants
994	{
995	giet_barrier_t* barrier = (giet_barrier_t *) (vobj[vobj_id].vaddr);
996	barrier->count = vobj[vobj_id].init;
997	barrier->init = vobj[vobj_id].init;
998	#if BOOT_DEBUG_VOBJS
999	_puts("BARRIER : ");
1000	_puts(vobj[vobj_id].name);
1001	_puts(" / init_value = ");
1002	_putd(barrier->init);
1003	_puts("\n");
1004	#endif
1005	break;
1006	}
1007	case VOBJ_TYPE_LOCK: // init value is "not taken"
1008	{
1009	unsigned int* lock = (unsigned int *) (vobj[vobj_id].vaddr);
1010	*lock = 0;
1011	#if BOOT_DEBUG_VOBJS
1012	_puts("LOCK : ");
1013	_puts(vobj[vobj_id].name);
1014	_puts("\n");
1015	#endif
1016	break;
1017	}
1018	case VOBJ_TYPE_BUFFER: // nothing to initialise
1019	{
1020	#if BOOT_DEBUG_VOBJS
1021	_puts("BUFFER : ");
1022	_puts(vobj[vobj_id].name);
1023	_puts(" / paddr = ");
1024	_putl(vobj[vobj_id].paddr);
1025	_puts(" / length = ");
1026	_putx(vobj[vobj_id].length);
1027	_puts("\n");
1028	#endif
1029	break;
1030	}
1031	case VOBJ_TYPE_MEMSPACE:
1032	{
1033	giet_memspace_t* memspace = (giet_memspace_t *) vobj[vobj_id].vaddr;
1034	memspace->buffer = (void *) vobj[vobj_id].vaddr + 8;
1035	memspace->size = vobj[vobj_id].length - 8;
1036	#if BOOT_DEBUG_VOBJS
1037	_puts("MEMSPACE : ");
1038	_puts(vobj[vobj_id].name);
1039	_puts(" / vaddr = ");
1040	_putx(vobj[vobj_id].vaddr);
1041	_puts(" / length = ");
1042	_putx(vobj[vobj_id].length);
1043	_puts(" / buffer = ");
1044	_putx((unsigned int)memspace->buffer);
1045	_puts(" / size = ");
1046	_putx(memspace->size);
1047	_puts("\n");
1048	#endif
1049	break;
1050	}
1051	case VOBJ_TYPE_PTAB: // nothing to initialize
1052	{
1053	ptab_found = 1;
1054	#if BOOT_DEBUG_VOBJS
1055	_puts("PTAB : ");
1056	_puts(vobj[vobj_id].name);
1057	_puts(" / length = ");
1058	_putx(vobj[vobj_id].length);
1059	_puts("\n");
1060	#endif
1061	break;
1062	}
1063	case VOBJ_TYPE_CONST:
1064	{
1065	unsigned int* addr = (unsigned int *) vobj[vobj_id].vaddr;
1066	*addr = vobj[vobj_id].init;
1067	#if BOOT_DEBUG_VOBJS
1068	_puts("CONST : ");
1069	_puts(vobj[vobj_id].name);
1070	_puts(" / Paddr :");
1071	_putl(vobj[vobj_id].paddr);
1072	_puts(" / init = ");
1073	_putx(*addr);
1074	_puts("\n");
1075	#endif
1076	break;
1077	}
1078	default:
1079	{
1080	_puts("\n[BOOT ERROR] illegal vobj type: ");
1081	_putd(vobj[vobj_id].type);
1082	_puts("\n");
1083	_exit();
1084	}
1085	} // end switch type
1086	} // end loop on vobjs
1087	if (ptab_found == 0)
1088	{
1089	_puts("\n[BOOT ERROR] Missing PTAB for vspace ");
1090	_putd(vspace_id);
1091	_exit();
1092	}
1093	} // end loop on vspaces
1094
1095	} // end boot_vobjs_init()
1096
1097	///////////////////////////////////////////////////////////////////////////////
1098	// This function returns in the vbase and length buffers the virtual base
1099	// address and the length of the segment allocated to the schedulers array
1100	// in the cluster defined by the clusterid argument.
1101	///////////////////////////////////////////////////////////////////////////////
1102	void boot_get_sched_vaddr( unsigned int cluster_id,
1103	unsigned int* vbase,
1104	unsigned int* length )
1105	{
1106	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
1107	mapping_vobj_t* vobj = _get_vobj_base(header);
1108	mapping_vseg_t* vseg = _get_vseg_base(header);
1109	mapping_pseg_t* pseg = _get_pseg_base(header);
1110
1111	unsigned int vseg_id;
1112	unsigned int found = 0;
1113
1114	for ( vseg_id = 0 ; (vseg_id < header->vsegs) && (found == 0) ; vseg_id++ )
1115	{
1116	if ( (vobj[vseg[vseg_id].vobj_offset].type == VOBJ_TYPE_SCHED) &&
1117	(pseg[vseg[vseg_id].psegid].clusterid == cluster_id ) )
1118	{
1119	*vbase = vseg[vseg_id].vbase;
1120	*length = vobj[vseg[vseg_id].vobj_offset].length;
1121	found = 1;
1122	}
1123	}
1124	if ( found == 0 )
1125	{
1126	mapping_cluster_t* cluster = _get_cluster_base(header);
1127	_puts("\n[BOOT ERROR] No vobj of type SCHED in cluster [");
1128	_putd( cluster[cluster_id].x );
1129	_puts(",");
1130	_putd( cluster[cluster_id].y );
1131	_puts("]\n");
1132	_exit();
1133	}
1134	} // end boot_get_sched_vaddr()
1135
1136	////////////////////////////////////////////////////////////////////////////////////
1137	// This function initialises all processors schedulers.
1138	// This is done by processor 0, and the MMU must be activated.
1139	// - In Step 1, it initialises the _schedulers[gpid] pointers array, and scan
1140	// the processors to initialise the schedulers, including the
1141	// idle_task context (ltid == 14).
1142	// - In Step 2, it scan all tasks in all vspaces to initialise the tasks contexts,
1143	// as specified in the mapping_info data structure.
1144	////////////////////////////////////////////////////////////////////////////////////
1145	void boot_schedulers_init()
1146	{
1147	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
1148	mapping_cluster_t* cluster = _get_cluster_base(header);
1149	mapping_vspace_t* vspace = _get_vspace_base(header);
1150	mapping_task_t* task = _get_task_base(header);
1151	mapping_vobj_t* vobj = _get_vobj_base(header);
1152	mapping_periph_t* periph = _get_periph_base(header);
1153	mapping_irq_t* irq = _get_irq_base(header);
1154
1155	unsigned int cluster_id; // cluster index in mapping_info
1156	unsigned int periph_id; // peripheral index in mapping_info
1157	unsigned int irq_id; // irq index in mapping_info
1158	unsigned int vspace_id; // vspace index in mapping_info
1159	unsigned int task_id; // task index in mapping_info
1160
1161	// TTY, NIC, CMA, HBA, TIM and DMA channels allocators
1162	// - TTY[0] is reserved for the kernel
1163	// - In all clusters the first NB_PROCS_MAX timers
1164	// are reserved for the kernel (context switch)
1165
1166	unsigned int alloc_tty_channel = 1; // TTY channel allocator
1167	unsigned int alloc_nic_channel = 0; // NIC channel allocator
1168	unsigned int alloc_cma_channel = 0; // CMA channel allocator
1169	unsigned int alloc_hba_channel = 0; // HBA channel allocator
1170	unsigned int alloc_tim_channel[X_SIZE*Y_SIZE]; // user TIMER allocators
1171
1172	/////////////////////////////////////////////////////////////////////////
1173	// Step 1 : loop on the clusters and on the processors
1174	// to initialize the schedulers[] array of pointers,
1175	// and the interrupt vectors.
1176	// Implementation note:
1177	// We need to use both proc_id to scan the mapping info structure,
1178	// and lpid to access the schedulers array.
1179	// - the _schedulers[] array of pointers can contain "holes", because
1180	// it is indexed by the global pid = cluster_xy*NB_PROCS_MAX + lpid
1181	// - the mapping info array of processors is contiguous, it is indexed
1182	// by proc_id, and use an offset specific in each cluster.
1183
1184	for (cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
1185	{
1186	unsigned int x = cluster[cluster_id].x;
1187	unsigned int y = cluster[cluster_id].y;
1188	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1189
1190	#if BOOT_DEBUG_SCHED
1191	_puts("\n[BOOT DEBUG] Initialise schedulers in cluster[");
1192	_putd( x );
1193	_puts(",");
1194	_putd( y );
1195	_puts("]\n");
1196	#endif
1197	alloc_tim_channel[cluster_id] = NB_PROCS_MAX;
1198
1199	// checking processors number
1200	if ( cluster[cluster_id].procs > NB_PROCS_MAX )
1201	{
1202	_puts("\n[BOOT ERROR] Too much processors in cluster[");
1203	_putd( x );
1204	_puts(",");
1205	_putd( y );
1206	_puts("]\n");
1207	_exit();
1208	}
1209
1210	static_scheduler_t* psched; // schedulers array base address in cluster
1211
1212	// no schedulers initialisation if nprocs == 0
1213	if ( cluster[cluster_id].procs > 0 )
1214	{
1215	// get scheduler array virtual base address and length
1216	unsigned int sched_vbase; // schedulers segment virtual base address
1217	unsigned int sched_length; // schedulers segment length
1218	boot_get_sched_vaddr( cluster_id, &sched_vbase, &sched_length );
1219
1220	if ( sched_length < (cluster[cluster_id].procs<<12) ) // 4 Kbytes per scheduler
1221	{
1222	_puts("\n[BOOT ERROR] Schedulers segment too small in cluster[");
1223	_putd( x );
1224	_puts(",");
1225	_putd( y );
1226	_puts("]\n");
1227	_exit();
1228	}
1229
1230	psched = (static_scheduler_t*)sched_vbase;
1231
1232	// scan cluster peripherals to find the ICU/XCU
1233	unsigned int found = 0;
1234	for ( periph_id = cluster[cluster_id].periph_offset ;
1235	periph_id < cluster[cluster_id].periph_offset + cluster[cluster_id].periphs;
1236	periph_id++ )
1237	{
1238	if( (periph[periph_id].type == PERIPH_TYPE_XCU) \|\|
1239	(periph[periph_id].type == PERIPH_TYPE_ICU) )
1240	{
1241	found = 1;
1242	break;
1243	}
1244	}
1245	if ( found == 0 )
1246	{
1247	_puts("\n[BOOT ERROR] No ICU / XCU component in cluster[");
1248	_putd( x );
1249	_puts(",");
1250	_putd( y );
1251	_puts("]\n");
1252	_exit();
1253	}
1254
1255	// loop on schedulers for default values initialisation
1256	unsigned int lpid;
1257	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1258	{
1259	// set the schedulers pointers array
1260	_schedulers[cluster_xy * NB_PROCS_MAX + lpid] =
1261	(static_scheduler_t*)&psched[lpid];
1262
1263	#if BOOT_DEBUG_SCHED
1264	_puts("\nProc[");
1265	_putd( x );
1266	_puts(",");
1267	_putd( y );
1268	_puts(",");
1269	_putd( lpid );
1270	_puts("] : scheduler virtual base address = ");
1271	_putx( (unsigned int)&psched[lpid] );
1272	_puts("\n");
1273	#endif
1274	// initialise the "tasks" and "current" variables default values
1275	psched[lpid].tasks = 0;
1276	psched[lpid].current = IDLE_TASK_INDEX;
1277
1278	// initialise HWI / PTI / SWI vectors (valid bit = 0)
1279	unsigned int slot;
1280	for (slot = 0; slot < 32; slot++)
1281	{
1282	psched[lpid].hwi_vector[slot] = 0;
1283	psched[lpid].pti_vector[slot] = 0;
1284	psched[lpid].wti_vector[slot] = 0;
1285	}
1286
1287	// initializes the idle_task context in scheduler:
1288	// - the SR slot is 0xFF03 because this task run in kernel mode.
1289	// - it uses the page table of vspace[0]
1290	// - it uses the kernel TTY terminal
1291	// - slots containing addresses (SP, RA, EPC, PTAB, PTPR)
1292	// must be re-initialised by kernel_parallel_init()
1293
1294	psched[lpid].context[IDLE_TASK_INDEX][CTX_CR_ID] = 0;
1295	psched[lpid].context[IDLE_TASK_INDEX][CTX_SR_ID] = 0xFF03;
1296	psched[lpid].context[IDLE_TASK_INDEX][CTX_PTPR_ID] = _ptabs_paddr[0]>>13;
1297	psched[lpid].context[IDLE_TASK_INDEX][CTX_PTAB_ID] = _ptabs_vaddr[0];
1298	psched[lpid].context[IDLE_TASK_INDEX][CTX_TTY_ID] = 0;
1299	psched[lpid].context[IDLE_TASK_INDEX][CTX_LTID_ID] = IDLE_TASK_INDEX;
1300	psched[lpid].context[IDLE_TASK_INDEX][CTX_VSID_ID] = 0;
1301	psched[lpid].context[IDLE_TASK_INDEX][CTX_RUN_ID] = 1;
1302	}
1303
1304
1305	// loop on irqs for actual HWI / PTI / WTI vectors initialisation
1306	for ( irq_id = periph[periph_id].irq_offset ;
1307	irq_id < periph[periph_id].irq_offset + periph[periph_id].irqs ;
1308	irq_id++ )
1309	{
1310	unsigned int lpid = irq[irq_id].dstid;
1311	unsigned int dstx = irq[irq_id].dstx;
1312	unsigned int dsty = irq[irq_id].dsty;
1313	if ( (dstx != x) \|\| (dsty != y) )
1314	{
1315	_puts("\n[BOOT ERROR] Bad IRQ cluster coordinates in cluster[");
1316	_putd( x );
1317	_puts(",");
1318	_putd( y );
1319	_puts("]\n - dstx = ");
1320	_putd( dstx );
1321	_puts("\n - dsty = ");
1322	_putd( dsty );
1323	_puts("\n - x = ");
1324	_putd( x );
1325	_puts("\n - y = ");
1326	_putd( y );
1327	_puts("\n");
1328	_exit();
1329	}
1330	if ( lpid >= cluster[cluster_id].procs )
1331	{
1332	_puts("\n[BOOT ERROR] Bad IRQ processor index in cluster[");
1333	_putd( x );
1334	_puts(",");
1335	_putd( y );
1336	_puts("]\n");
1337	_exit();
1338	}
1339	unsigned int type = irq[irq_id].srctype;
1340	unsigned int index = irq[irq_id].srcid;
1341	unsigned int isr = irq[irq_id].isr;
1342	unsigned int channel = irq[irq_id].channel;
1343
1344	unsigned int entry = ((isr & 0xFFFF) ) \|
1345	((channel & 0x7FFF) << 16) \|
1346	0x80000000; // Valid entry
1347
1348	if (type == IRQ_TYPE_HWI) psched[lpid].hwi_vector[index] = entry;
1349	else if (type == IRQ_TYPE_PTI) psched[lpid].pti_vector[index] = entry;
1350	else if (type == IRQ_TYPE_WTI) psched[lpid].wti_vector[index] = entry;
1351
1352	#if BOOT_DEBUG_SCHED
1353	_puts("- IRQ : type = ");
1354	_putd( type );
1355	_puts(" / index = ");
1356	_putd( index );
1357	_puts(" / isr = ");
1358	_putd( isr );
1359	_puts(" / channel = ");
1360	_putd( channel );
1361	_puts("\n");
1362	#endif
1363
1364	} // end for irqs
1365	} // end if nprocs > 0
1366	} // end for clusters
1367
1368	///////////////////////////////////////////////////////////////////
1369	// Step 2 : loop on the vspaces and the tasks to complete
1370	// the schedulers and task contexts initialisation.
1371
1372	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1373	{
1374	// We must set the PTPR depending on the vspace, because the start_vector
1375	// and the stack address are defined in virtual space.
1376	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id] >> 13) );
1377
1378	// loop on the tasks in vspace (task_id is the global index)
1379	for (task_id = vspace[vspace_id].task_offset;
1380	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
1381	task_id++)
1382	{
1383	// compute the cluster coordinates & local processor index
1384	unsigned int x = cluster[task[task_id].clusterid].x;
1385	unsigned int y = cluster[task[task_id].clusterid].y;
1386	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1387	unsigned int lpid = task[task_id].proclocid;
1388
1389	#if BOOT_DEBUG_SCHED
1390	_puts("\n[BOOT DEBUG] Initialise context for task ");
1391	_puts( task[task_id].name );
1392	_puts(" in vspace ");
1393	_puts( vspace[vspace_id].name );
1394	_puts(" running on cluster[");
1395	_putd( x );
1396	_puts(",");
1397	_putd( y );
1398	_puts("]\n");
1399	#endif
1400	// compute gpid (global processor index) and scheduler base address
1401	unsigned int gpid = cluster_xy * NB_PROCS_MAX + lpid;
1402	static_scheduler_t* psched = _schedulers[gpid];
1403
1404	// ctx_sr : value required before an eret instruction
1405	unsigned int ctx_sr = 0x0000FF13;
1406
1407	// ctx_ptpr : page table physical base address (shifted by 13 bit)
1408	unsigned int ctx_ptpr = (unsigned int)(_ptabs_paddr[vspace_id] >> 13);
1409
1410	// ctx_ptab : page_table virtual base address
1411	unsigned int ctx_ptab = _ptabs_vaddr[vspace_id];
1412
1413	// ctx_tty : TTY terminal global index provided by the global allocator
1414	// Each user terminal is a private ressource: the number of
1415	// requested terminal cannot be larger than NB_TTY_CHANNELS.
1416	unsigned int ctx_tty = 0xFFFFFFFF;
1417	if (task[task_id].use_tty)
1418	{
1419	if (alloc_tty_channel >= NB_TTY_CHANNELS)
1420	{
1421	_puts("\n[BOOT ERROR] TTY channel index too large for task ");
1422	_puts(task[task_id].name);
1423	_puts(" in vspace ");
1424	_puts(vspace[vspace_id].name);
1425	_puts("\n");
1426	_exit();
1427	}
1428	ctx_tty = alloc_tty_channel;
1429	alloc_tty_channel++;
1430	}
1431
1432	// ctx_nic : NIC channel global index provided by the global allocator
1433	// Each channel is a private ressource: the number of
1434	// requested channels cannot be larger than NB_NIC_CHANNELS.
1435	unsigned int ctx_nic = 0xFFFFFFFF;
1436	if (task[task_id].use_nic)
1437	{
1438	if (alloc_nic_channel >= NB_NIC_CHANNELS)
1439	{
1440	_puts("\n[BOOT ERROR] NIC channel index too large for task ");
1441	_puts(task[task_id].name);
1442	_puts(" in vspace ");
1443	_puts(vspace[vspace_id].name);
1444	_puts("\n");
1445	_exit();
1446	}
1447	ctx_nic = alloc_nic_channel;
1448	alloc_nic_channel++;
1449	}
1450
1451	// ctx_cma : CMA channel global index provided by the global allocator
1452	// Each channel is a private ressource: the number of
1453	// requested channels cannot be larger than NB_NIC_CHANNELS.
1454	unsigned int ctx_cma = 0xFFFFFFFF;
1455	if (task[task_id].use_cma)
1456	{
1457	if (alloc_cma_channel >= NB_CMA_CHANNELS)
1458	{
1459	_puts("\n[BOOT ERROR] CMA channel index too large for task ");
1460	_puts(task[task_id].name);
1461	_puts(" in vspace ");
1462	_puts(vspace[vspace_id].name);
1463	_puts("\n");
1464	_exit();
1465	}
1466	ctx_cma = alloc_cma_channel;
1467	alloc_cma_channel++;
1468	}
1469
1470	// ctx_hba : HBA channel global index provided by the global allocator
1471	// Each channel is a private ressource: the number of
1472	// requested channels cannot be larger than NB_NIC_CHANNELS.
1473	unsigned int ctx_hba = 0xFFFFFFFF;
1474	if (task[task_id].use_hba)
1475	{
1476	if (alloc_hba_channel >= NB_IOC_CHANNELS)
1477	{
1478	_puts("\n[BOOT ERROR] IOC channel index too large for task ");
1479	_puts(task[task_id].name);
1480	_puts(" in vspace ");
1481	_puts(vspace[vspace_id].name);
1482	_puts("\n");
1483	_exit();
1484	}
1485	ctx_hba = alloc_hba_channel;
1486	alloc_hba_channel++;
1487	}
1488	// ctx_tim : TIMER local channel index provided by the cluster allocator
1489	// Each timer is a private ressource
1490	unsigned int ctx_tim = 0xFFFFFFFF;
1491	if (task[task_id].use_tim)
1492	{
1493	unsigned int cluster_id = task[task_id].clusterid;
1494
1495	if ( alloc_tim_channel[cluster_id] >= NB_TIM_CHANNELS )
1496	{
1497	_puts("\n[BOOT ERROR] local TIMER index too large for task ");
1498	_puts(task[task_id].name);
1499	_puts(" in vspace ");
1500	_puts(vspace[vspace_id].name);
1501	_puts("\n");
1502	_exit();
1503	}
1504	ctx_tim = alloc_tim_channel[cluster_id];
1505	alloc_tim_channel[cluster_id]++;
1506	}
1507	// ctx_epc : Get the virtual address of the memory location containing
1508	// the task entry point : the start_vector is stored by GCC in the seg_data
1509	// segment and we must wait the .elf loading to get the entry point value...
1510	mapping_vobj_t* pvobj = &vobj[vspace[vspace_id].vobj_offset +
1511	vspace[vspace_id].start_offset];
1512	unsigned int ctx_epc = pvobj->vaddr + (task[task_id].startid)*4;
1513
1514	// ctx_sp : Get the vobj containing the stack
1515	unsigned int vobj_id = task[task_id].stack_vobjid + vspace[vspace_id].vobj_offset;
1516	unsigned int ctx_sp = vobj[vobj_id].vaddr + vobj[vobj_id].length;
1517
1518	// get local task index in scheduler
1519	unsigned int ltid = psched->tasks;
1520
1521	// get vspace thread index
1522	unsigned int thread_id = task[task_id].trdid;
1523
1524	if (ltid >= IDLE_TASK_INDEX)
1525	{
1526	_puts("\n[BOOT ERROR] in boot_schedulers_init() : ");
1527	_putd( ltid );
1528	_puts(" tasks allocated to processor ");
1529	_putd( gpid );
1530	_puts(" / max is ");
1531	_putd( IDLE_TASK_INDEX );
1532	_puts("\n");
1533	_exit();
1534	}
1535
1536	// update the "tasks" and "current" fields in scheduler:
1537	// the first task to execute is task 0 as soon as there is at least
1538	// one task allocated to processor.
1539	psched->tasks = ltid + 1;
1540	psched->current = 0;
1541
1542	// initializes the task context in scheduler
1543	psched->context[ltid][CTX_CR_ID] = 0;
1544	psched->context[ltid][CTX_SR_ID] = ctx_sr;
1545	psched->context[ltid][CTX_SP_ID] = ctx_sp;
1546	psched->context[ltid][CTX_EPC_ID] = ctx_epc;
1547	psched->context[ltid][CTX_PTPR_ID] = ctx_ptpr;
1548	psched->context[ltid][CTX_TTY_ID] = ctx_tty;
1549	psched->context[ltid][CTX_CMA_ID] = ctx_cma;
1550	psched->context[ltid][CTX_HBA_ID] = ctx_hba;
1551	psched->context[ltid][CTX_NIC_ID] = ctx_nic;
1552	psched->context[ltid][CTX_TIM_ID] = ctx_tim;
1553	psched->context[ltid][CTX_PTAB_ID] = ctx_ptab;
1554	psched->context[ltid][CTX_LTID_ID] = ltid;
1555	psched->context[ltid][CTX_GTID_ID] = task_id;
1556	psched->context[ltid][CTX_TRDID_ID] = thread_id;
1557	psched->context[ltid][CTX_VSID_ID] = vspace_id;
1558	psched->context[ltid][CTX_RUN_ID] = 1;
1559
1560	#if BOOT_DEBUG_SCHED
1561	_puts("\nTask ");
1562	_putd( task_id );
1563	_puts(" allocated to processor[");
1564	_putd( x )
1565	_puts(",");
1566	_putd( y )
1567	_puts(",");
1568	_putd( lpid )
1569	_puts("]\n - ctx[LTID] = ");
1570	_putd( psched->context[ltid][CTX_LTID_ID] );
1571	_puts("\n - ctx[SR] = ");
1572	_putx( psched->context[ltid][CTX_SR_ID] );
1573	_puts("\n - ctx[SP] = ");
1574	_putx( psched->context[ltid][CTX_SP_ID] );
1575	_puts("\n - ctx[EPC] = ");
1576	_putx( psched->context[ltid][CTX_EPC_ID] );
1577	_puts("\n - ctx[PTPR] = ");
1578	_putx( psched->context[ltid][CTX_PTPR_ID] );
1579	_puts("\n - ctx[TTY] = ");
1580	_putx( psched->context[ltid][CTX_TTY_ID] );
1581	_puts("\n - ctx[NIC] = ");
1582	_putx( psched->context[ltid][CTX_NIC_ID] );
1583	_puts("\n - ctx[CMA] = ");
1584	_putx( psched->context[ltid][CTX_CMA_ID] );
1585	_puts("\n - ctx[IOC] = ");
1586	_putx( psched->context[ltid][CTX_HBA_ID] );
1587	_puts("\n - ctx[TIM] = ");
1588	_putx( psched->context[ltid][CTX_TIM_ID] );
1589	_puts("\n - ctx[PTAB] = ");
1590	_putx( psched->context[ltid][CTX_PTAB_ID] );
1591	_puts("\n - ctx[GTID] = ");
1592	_putx( psched->context[ltid][CTX_GTID_ID] );
1593	_puts("\n - ctx[VSID] = ");
1594	_putx( psched->context[ltid][CTX_VSID_ID] );
1595	_puts("\n - ctx[TRDID] = ");
1596	_putx( psched->context[ltid][CTX_TRDID_ID] );
1597	_puts("\n");
1598	#endif
1599
1600	} // end loop on tasks
1601	} // end loop on vspaces
1602	} // end _schedulers_init()
1603
1604	//////////////////////////////////////////////////////////////////////////////////
1605	// This function loads the map.bin file from block device.
1606	// The fat global varible is defined in fat32.c file.
1607	//////////////////////////////////////////////////////////////////////////////////
1608	void boot_mapping_init()
1609	{
1610	_ioc_init( 0 );
1611
1612	int fd_id = _fat_open( IOC_BOOT_MODE,
1613	"map.bin",
1614	0 ); // no creation
1615
1616	if ( fd_id == -1 )
1617	{
1618	_puts("\n[BOOT ERROR] : map.bin file not found \n");
1619	_exit();
1620	}
1621
1622	#if BOOT_DEBUG_MAPPING
1623	_puts("\n[BOOT] map.bin file successfully open at cycle ");
1624	_putd(_get_proctime());
1625	_puts("\n");
1626	#endif
1627
1628	unsigned int size = fat.fd[fd_id].file_size;
1629	unsigned int nblocks = size >> 9;
1630	unsigned int offset = size & 0x1FF;
1631	if ( offset ) nblocks++;
1632
1633	unsigned int ok = _fat_read( IOC_BOOT_MODE,
1634	fd_id,
1635	(unsigned int*)( &seg_boot_mapping_base),
1636	nblocks,
1637	0 ); // offset
1638	if ( ok == -1 )
1639	{
1640	_puts("\n[BOOT ERROR] : unable to load map.bin file \n");
1641	_exit();
1642	}
1643	_fat_close( fd_id );
1644
1645	boot_mapping_check();
1646	} // end boot_mapping_init()
1647
1648
1649	//////////////////////////////////////////////////////////////////////////////////
1650	// This function open the .elf file identified by the "pathname" argument.
1651	// It loads the complete file in a dedicated buffer, it copies all loadable
1652	// segments at the memory virtual address defined in the .elf file,
1653	// and close the file.
1654	// Notes:
1655	// - The processor PTPR should contain the value corresponding to the
1656	// vspace containing the .elf file.
1657	// - As this function requires a temporary memory buffer
1658	// to load the complete .elf file before to copy the various segments
1659	// to te proper location, it uses the seg_boot_buffer defined in map.xml.
1660	//////////////////////////////////////////////////////////////////////////////////
1661	void load_one_elf_file( unsigned int mode,
1662	char* pathname,
1663	unsigned int vspace_id ) // to use the proper page_table
1664	{
1665	unsigned int seg_id;
1666
1667	// get boot buffer address and size
1668	char* boot_buffer = (char*)(&seg_boot_buffer_base);
1669	unsigned int boot_buffer_size = (unsigned int)(&seg_boot_buffer_size);
1670
1671	#if BOOT_DEBUG_ELF
1672	_puts("\n[BOOT DEBUG] Start searching file ");
1673	_puts( pathname );
1674	_puts(" at cycle ");
1675	_putd( _get_proctime() );
1676	_puts("\n");
1677	#endif
1678
1679	// open .elf file
1680	int fd_id = _fat_open( mode,
1681	pathname,
1682	0 ); // no creation
1683	if ( fd_id < 0 )
1684	{
1685	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1686	_puts( pathname );
1687	_puts(" not found\n");
1688	_exit();
1689	}
1690
1691	// check boot_buffer size versus file size
1692	if ( fat.fd[fd_id].file_size > boot_buffer_size )
1693	{
1694	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1695	_puts( pathname );
1696	_puts(" exceeds the seg_boot_buffer size\n");
1697	_exit();
1698	}
1699
1700	// compute number of sectors
1701	unsigned int nbytes = fat.fd[fd_id].file_size;
1702	unsigned int nsectors = nbytes>>9;
1703	if( nbytes & 0x1FF) nsectors++;
1704
1705	// load file in boot_buffer
1706	if( _fat_read( mode,
1707	fd_id,
1708	boot_buffer,
1709	nsectors,
1710	0 ) != nsectors )
1711	{
1712	_puts("\n[BOOT ERROR] load_one_elf_file() : unexpected EOF for file ");
1713	_puts( pathname );
1714	_puts("\n");
1715	_exit();
1716	}
1717
1718	// Check ELF Magic Number in ELF header
1719	Elf32_Ehdr* elf_header_ptr = (Elf32_Ehdr*)boot_buffer;
1720
1721	if ( (elf_header_ptr->e_ident[EI_MAG0] != ELFMAG0) \|\|
1722	(elf_header_ptr->e_ident[EI_MAG1] != ELFMAG1) \|\|
1723	(elf_header_ptr->e_ident[EI_MAG2] != ELFMAG2) \|\|
1724	(elf_header_ptr->e_ident[EI_MAG3] != ELFMAG3) )
1725	{
1726	_puts("\n[BOOT ERROR] load_elf() : file ");
1727	_puts( pathname );
1728	_puts(" does not use ELF format\n");
1729	_exit();
1730	}
1731
1732	// get program header table pointer
1733	unsigned int pht_index = elf_header_ptr->e_phoff;
1734	if( pht_index == 0 )
1735	{
1736	_puts("\n[BOOT ERROR] load_one_elf_file() : file ");
1737	_puts( pathname );
1738	_puts(" does not contain loadable segment\n");
1739	_exit();
1740	}
1741	Elf32_Phdr* elf_pht_ptr = (Elf32_Phdr*)(boot_buffer + pht_index);
1742
1743	// get number of segments
1744	unsigned int nsegments = elf_header_ptr->e_phnum;
1745
1746	#if BOOT_DEBUG_ELF
1747	_puts("\n[BOOT DEBUG] File ");
1748	_puts( pathname );
1749	_puts(" loaded at cycle ");
1750	_putd( _get_proctime() );
1751	_puts(" / bytes = ");
1752	_putd( nbytes );
1753	_puts(" / sectors = ");
1754	_putd( nsectors );
1755	_puts("\n");
1756	#endif
1757
1758	// Loop on loadable segments in the ELF file
1759	for (seg_id = 0 ; seg_id < nsegments ; seg_id++)
1760	{
1761	if(elf_pht_ptr[seg_id].p_type == PT_LOAD)
1762	{
1763	// Get segment attributes
1764	unsigned int seg_vaddr = elf_pht_ptr[seg_id].p_vaddr;
1765	unsigned int seg_offset = elf_pht_ptr[seg_id].p_offset;
1766	unsigned int seg_filesz = elf_pht_ptr[seg_id].p_filesz;
1767	unsigned int seg_memsz = elf_pht_ptr[seg_id].p_memsz;
1768
1769	if( seg_memsz < seg_filesz )
1770	{
1771	_puts("\n[BOOT ERROR] load_one_elf_file() : segment at vaddr = ");
1772	_putx( seg_vaddr );
1773	_puts(" in file ");
1774	_puts( pathname );
1775	_puts(" has a wrong size \n");
1776	_exit();
1777	}
1778
1779	// fill empty space with 0 as required
1780	if( seg_memsz > seg_filesz )
1781	{
1782	unsigned int i;
1783	for( i = seg_filesz ; i < seg_memsz ; i++ ) boot_buffer[i+seg_offset] = 0;
1784	}
1785
1786	unsigned int src_vaddr = (unsigned int)boot_buffer + seg_offset;
1787
1788	#if BOOT_DEBUG_ELF
1789	_puts(" - segment ");
1790	_putd( seg_id );
1791	_puts(" / dst_vaddr = ");
1792	_putx( seg_vaddr );
1793	_puts(" / src_vaddr = ");
1794	_putx( src_vaddr );
1795	_puts(" / size = ");
1796	_putx( seg_filesz );
1797	_puts("\n");
1798	#endif
1799
1800	// copy the segment from boot buffer to destination buffer
1801	if( NB_DMA_CHANNELS > 0 )
1802	{
1803	_dma_copy( vspace_id, // required for V2P translation
1804	(char*)seg_vaddr,
1805	(char*)src_vaddr,
1806	seg_filesz );
1807	}
1808	else
1809	{
1810	_memcpy( (char*)seg_vaddr,
1811	(char*)src_vaddr,
1812	seg_filesz );
1813	}
1814	}
1815	} // end for segments
1816
1817	// close .elf file
1818	_fat_close( fd_id );
1819
1820	} // end load_one_elf_file()
1821
1822
1823	//////////////////////////////////////////////////////////////////////////////////
1824	// This function uses the map.bin data structure to load the "kernel.elf" file
1825	// as well as the various "application.elf" files.
1826	// The "preloader.elf" file is not loaded, because it has been burned in the ROM.
1827	// The "boot.elf" file is not loaded, because it has been loaded by the preloader.
1828	// This function scans all vobjs defined in the map.bin data structure to collect
1829	// all .elf files pathnames, and calls the load_one_elf_file() function to
1830	// load all loadable segments at the virtual address found in the .elf file.
1831	//////////////////////////////////////////////////////////////////////////////////
1832	void boot_elf_load()
1833	{
1834	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
1835	mapping_vspace_t* vspace = _get_vspace_base( header );
1836	mapping_vobj_t* vobj = _get_vobj_base( header );
1837	unsigned int vspace_id;
1838	unsigned int vobj_id;
1839	unsigned int found;
1840
1841	// Scan all vobjs corresponding to global vsegs,
1842	// to find the pathname to the kernel.elf file
1843	found = 0;
1844	for( vobj_id = 0 ; vobj_id < header->globals ; vobj_id++ )
1845	{
1846	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
1847	{
1848	found = 1;
1849	break;
1850	}
1851	}
1852
1853	// We need one kernel.elf file
1854	if (found == 0)
1855	{
1856	_puts("[BOOT ERROR] boot_elf_load() : kernel.elf file not found\n");
1857	_exit();
1858	}
1859
1860	load_one_elf_file( IOC_BOOT_MODE,
1861	vobj[vobj_id].binpath,
1862	0 ); // vspace 0
1863
1864	_puts("\n[BOOT] File \"");
1865	_puts( vobj[vobj_id].binpath );
1866	_puts("\" loaded at cycle ");
1867	_putd( _get_proctime() );
1868	_puts("\n");
1869
1870	// loop on the vspaces, scanning all vobjs in a vspace,
1871	// to find the pathname of the .elf file associated to the vspace.
1872	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
1873	{
1874	// Set PTPR depending on the vspace, as seg_data is defined in virtual space.
1875	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id] >> 13) );
1876
1877	// loop on the vobjs in vspace (vobj_id is the global index)
1878	unsigned int found = 0;
1879	for (vobj_id = vspace[vspace_id].vobj_offset;
1880	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1881	vobj_id++)
1882	{
1883	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
1884	{
1885	found = 1;
1886	break;
1887	}
1888	}
1889
1890	// We want one .elf file per vspace
1891	if (found == 0)
1892	{
1893	_puts("[BOOT ERROR] boot_elf_load() : .elf file not found for vspace ");
1894	_puts( vspace[vspace_id].name );
1895	_puts("\n");
1896	_exit();
1897	}
1898
1899	load_one_elf_file( IOC_BOOT_MODE,
1900	vobj[vobj_id].binpath,
1901	vspace_id );
1902
1903	_puts("\n[BOOT] File \"");
1904	_puts( vobj[vobj_id].binpath );
1905	_puts("\" loaded at cycle ");
1906	_putd( _get_proctime() );
1907	_puts("\n");
1908
1909	} // end for vspaces
1910
1911	// restaure vspace 0 PTPR
1912	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0] >> 13) );
1913
1914	} // end boot_elf_load()
1915
1916	////////////////////////////////////////////////////////////////////////////////
1917	// This function intializes the periherals and coprocessors, as specified
1918	// in the mapping_info file.
1919	////////////////////////////////////////////////////////////////////////////////
1920	void boot_peripherals_init()
1921	{
1922	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
1923	mapping_cluster_t * cluster = _get_cluster_base(header);
1924	mapping_periph_t * periph = _get_periph_base(header);
1925	mapping_vobj_t * vobj = _get_vobj_base(header);
1926	mapping_vspace_t * vspace = _get_vspace_base(header);
1927	mapping_coproc_t * coproc = _get_coproc_base(header);
1928	mapping_cp_port_t * cp_port = _get_cp_port_base(header);
1929	mapping_irq_t * irq = _get_irq_base(header);
1930
1931	unsigned int cluster_id;
1932	unsigned int periph_id;
1933	unsigned int coproc_id;
1934	unsigned int cp_port_id;
1935	unsigned int channel_id;
1936
1937	// loop on all physical clusters
1938	for (cluster_id = 0; cluster_id < X_SIZE*Y_SIZE; cluster_id++)
1939	{
1940	// computes cluster coordinates
1941	unsigned int x = cluster[cluster_id].x;
1942	unsigned int y = cluster[cluster_id].y;
1943	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1944
1945	#if BOOT_DEBUG_PERI
1946	_puts("\n[BOOT DEBUG] ****** peripherals initialisation in cluster[");
1947	_putd( x );
1948	_puts(",");
1949	_putd( y );
1950	_puts("] ******\n");
1951	#endif
1952
1953	// loop on peripherals
1954	for (periph_id = cluster[cluster_id].periph_offset;
1955	periph_id < cluster[cluster_id].periph_offset +
1956	cluster[cluster_id].periphs; periph_id++)
1957	{
1958	unsigned int type = periph[periph_id].type;
1959	unsigned int channels = periph[periph_id].channels;
1960
1961	switch (type)
1962	{
1963	case PERIPH_TYPE_IOC: // vci_block_device component
1964	{
1965	// initialize all channels except channel 0 because it has been
1966	// initialized by the preloader.
1967	for (channel_id = 1; channel_id < channels; channel_id++)
1968	{
1969	_ioc_init( channel_id );
1970	}
1971	#if BOOT_DEBUG_PERI
1972	_puts("- IOC / channels = ");
1973	_putd(channels);
1974	_puts("\n");
1975	#endif
1976	break;
1977	}
1978	case PERIPH_TYPE_CMA: // vci_chbuf_dma component
1979	{
1980	for (channel_id = 0; channel_id < channels; channel_id++)
1981	{
1982	// TODO
1983	}
1984	#if BOOT_DEBUG_PERI
1985	_puts("- CMA / channels = ");
1986	_putd(channels);
1987	_puts("\n");
1988	#endif
1989	break;
1990	}
1991	case PERIPH_TYPE_NIC: // vci_multi_nic component
1992	{
1993	for (channel_id = 0; channel_id < channels; channel_id++)
1994	{
1995	// TODO
1996	}
1997	#if BOOT_DEBUG_PERI
1998	_puts("- NIC / channels = ");
1999	_putd(channels);
2000	_puts("\n");
2001	#endif
2002	break;
2003	}
2004	case PERIPH_TYPE_TTY: // vci_multi_tty component
2005	{
2006	// nothing to do
2007	#if BOOT_DEBUG_PERI
2008	_puts("- TTY / channels = ");
2009	_putd(channels);
2010	_puts("\n");
2011	#endif
2012	break;
2013	}
2014	case PERIPH_TYPE_IOB: // vci_io_bridge component
2015	{
2016	// initialize r_xicu_base & r_xicu_size registers
2017	unsigned int base = (unsigned int)&seg_xcu_base;
2018
2019	#if BOOT_DEBUG_PERI
2020	_puts("- IOB / channels = ");
2021	_putd(channels);
2022	_puts(" / XICU_BASE = ");
2023	_putx( base );
2024	_puts(" / XICU_SIZE = ");
2025	_putx( 0x1000 );
2026	_puts("\n");
2027	#endif
2028	_iob_set_xicu_base( cluster_xy, base );
2029	_iob_set_xicu_size( cluster_xy, 0x1000 );
2030
2031	if (GIET_USE_IOMMU)
2032	{
2033	// TODO
2034	// get the iommu page table physical address
2035	// define IPI address mapping the IOC interrupt
2036	// set IOMMU page table address
2037	// pseg_base[IOB_IOMMU_PTPR] = ptab_pbase;
2038	// activate IOMMU
2039	// pseg_base[IOB_IOMMU_ACTIVE] = 1;
2040	}
2041	break;
2042	}
2043	case PERIPH_TYPE_PIC: // vci_iopic component
2044	{
2045
2046	#if BOOT_DEBUG_PERI
2047	_puts("- PIC / channels = ");
2048	_putd(channels);
2049	_puts("\n");
2050	#endif
2051	// scan all HWI IRQs defined in mapping for PIC component,
2052	// and initialises addresses for WTI IRQs
2053	for ( channel_id = periph[periph_id].irq_offset ;
2054	channel_id < periph[periph_id].irq_offset + periph[periph_id].irqs ;
2055	channel_id++ )
2056	{
2057	unsigned int hwi_id = irq[channel_id].srcid; // HWI index in PIC
2058	unsigned int wti_id = irq[channel_id].dstid; // WTI index in XCU
2059	unsigned int x = irq[channel_id].dstx; // XCU X coordinate
2060	unsigned int y = irq[channel_id].dsty; // XCU Y coordinate
2061	unsigned int cluster = (x<<Y_WIDTH) + y; // XCU cluster
2062	unsigned int vaddr;
2063
2064	_xcu_get_wti_address( wti_id, &vaddr );
2065
2066	_pic_init( hwi_id, vaddr, cluster );
2067	#if BOOT_DEBUG_PERI
2068	_puts(" hwi_index = ");
2069	_putd( hwi_id );
2070	_puts(" / wti_index = ");
2071	_putd( wti_id );
2072	_puts(" / vaddr = ");
2073	_putx( vaddr );
2074	_puts(" in cluster[");
2075	_putd( x );
2076	_puts(",");
2077	_putd( y );
2078	_puts("]\n");
2079	#endif
2080	}
2081	break;
2082	}
2083	} // end switch periph type
2084	} // end for periphs
2085
2086	#if BOOT_DEBUG_PERI
2087	_puts("\n[BOOT DEBUG] ****** coprocessors initialisation in cluster[");
2088	_putd( x );
2089	_puts(",");
2090	_putd( y );
2091	_puts("] ******\n");
2092	#endif
2093
2094	// loop on coprocessors
2095	for ( coproc_id = cluster[cluster_id].coproc_offset;
2096	coproc_id < cluster[cluster_id].coproc_offset +
2097	cluster[cluster_id].coprocs; coproc_id++ )
2098	{
2099
2100	#if BOOT_DEBUG_PERI
2101	_puts("- coprocessor name : ");
2102	_puts(coproc[coproc_id].name);
2103	_puts(" / nb ports = ");
2104	_putd((unsigned int) coproc[coproc_id].ports);
2105	_puts("\n");
2106	#endif
2107	// loop on the coprocessor ports
2108	for ( cp_port_id = coproc[coproc_id].port_offset;
2109	cp_port_id < coproc[coproc_id].port_offset + coproc[coproc_id].ports;
2110	cp_port_id++ )
2111	{
2112	unsigned int vspace_id = cp_port[cp_port_id].vspaceid;
2113	unsigned int vobj_id = cp_port[cp_port_id].mwmr_vobjid +
2114	vspace[vspace_id].vobj_offset;
2115
2116	// Get MWMR channel base address
2117	paddr_t mwmr_channel_pbase = vobj[vobj_id].paddr;
2118
2119	_mwr_hw_init( cluster_xy,
2120	cp_port_id,
2121	cp_port[cp_port_id].direction,
2122	mwmr_channel_pbase );
2123	#if BOOT_DEBUG_PERI
2124	_puts(" port direction: ");
2125	_putd( (unsigned int)cp_port[cp_port_id].direction );
2126	_puts(" / mwmr_channel_pbase = ");
2127	_putl( mwmr_channel_pbase );
2128	_puts(" / name = ");
2129	_puts(vobj[vobj_id].name);
2130	_puts(" / in vspace ");
2131	_puts(vspace[vspace_id].name);
2132	_puts("\n");
2133	#endif
2134	} // end for cp_ports
2135	} // end for coprocs
2136	} // end for clusters
2137	} // end boot_peripherals_init()
2138
2139	/////////////////////////////////////////////////////////////////////////
2140	// This function is the entry point of the boot code for all processors.
2141	// Most of this code is executed by Processor 0 only.
2142	/////////////////////////////////////////////////////////////////////////
2143	void boot_init()
2144	{
2145	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
2146	mapping_cluster_t* cluster = _get_cluster_base(header);
2147	unsigned int gpid = _get_procid();
2148
2149	if ( gpid == 0 ) // only Processor 0 does it
2150	{
2151	_puts("\n[BOOT] boot_init start at cycle ");
2152	_putd(_get_proctime());
2153	_puts("\n");
2154
2155	// Loading the map.bin file into memory and checking it
2156	boot_mapping_init();
2157
2158	_puts("\n[BOOT] Mapping \"");
2159	_puts( header->name );
2160	_puts("\" loaded at cycle ");
2161	_putd(_get_proctime());
2162	_puts("\n");
2163
2164	// Building all page tables
2165	boot_pt_init();
2166
2167	// Activating proc 0 MMU
2168	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0]>>13) );
2169	_set_mmu_mode( 0xF );
2170
2171	_puts("\n[BOOT] Processor[0,0,0] : MMU activation at cycle ");
2172	_putd(_get_proctime());
2173	_puts("\n");
2174
2175	// Initialising private vobjs in vspaces
2176	boot_vobjs_init();
2177
2178	_puts("\n[BOOT] Private vobjs initialised at cycle ");
2179	_putd(_get_proctime());
2180	_puts("\n");
2181
2182	// Initializing schedulers
2183	boot_schedulers_init();
2184
2185	_puts("\n[BOOT] Schedulers initialised at cycle ");
2186	_putd(_get_proctime());
2187	_puts("\n");
2188
2189	// Setting CP0_SCHED register for proc 0
2190	_set_sched( (unsigned int)_schedulers[0] );
2191
2192	// Initializing non replicated peripherals
2193	boot_peripherals_init();
2194
2195	_puts("\n[BOOT] Non replicated peripherals initialised at cycle ");
2196	_putd(_get_proctime());
2197	_puts("\n");
2198
2199	// Loading all .elf files
2200	boot_elf_load();
2201
2202	// P0 starts all other processors
2203	unsigned int clusterid, p;
2204
2205	for ( clusterid = 0 ; clusterid < X_SIZE*Y_SIZE ; clusterid++ )
2206	{
2207	unsigned int nprocs = cluster[clusterid].procs;
2208	unsigned int xdest = cluster[clusterid].x;
2209	unsigned int ydest = cluster[clusterid].y;
2210	unsigned int cluster_xy = (xdest<<Y_WIDTH) + ydest;
2211
2212	for ( p = 0 ; p < nprocs; p++ )
2213	{
2214	if ( (nprocs > 0) && ((clusterid != 0) \|\| (p != 0)) )
2215	{
2216	_xcu_send_wti( cluster_xy, p, (unsigned int)boot_init );
2217	}
2218	}
2219	}
2220
2221	} // end monoprocessor boot
2222
2223	// reset BEV bit in the status register to use GIET exception
2224	// handler instead of the PRELOADER exception handler
2225	_set_sr( 0 );
2226
2227	// all processor initialise SCHED register
2228	_set_sched( (unsigned int)_schedulers[gpid] );
2229
2230	// all processors (but Proc 0) activate MMU
2231	if ( gpid != 0 )
2232	{
2233	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0]>>13) );
2234	_set_mmu_mode( 0xF );
2235	}
2236
2237	// all processors jump to kernel_init
2238	unsigned int kernel_entry = (unsigned int)&seg_kernel_init_base;
2239	asm volatile( "jr %0" ::"r"(kernel_entry) );
2240
2241	} // end boot_init()
2242
2243
2244	// Local Variables:
2245	// tab-width: 4
2246	// c-basic-offset: 4
2247	// c-file-offsets:((innamespace . 0)(inline-open . 0))
2248	// indent-tabs-mode: nil
2249	// End:
2250	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
2251

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