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source: soft/giet_vm/giet_boot/boot.c @ 384

Last change on this file since 384 was 369, checked in by alain, 10 years ago
adapt the boot code to the new barrier structure.
File size: 91.4 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 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, 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, 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 <bdv_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(SEG_BOOT_MAPPING_BASE)
113	# error: The SEG_BOOT_MAPPING_BASE value must be defined in the hard_config.h file !
114	#endif
115
116	#if !defined(NB_PROCS_MAX)
117	# error: The NB_PROCS_MAX value must be defined in the 'hard_config.h' file !
118	#endif
119
120	#if !defined(GIET_NB_VSPACE_MAX)
121	# error: The GIET_NB_VSPACE_MAX value must be defined in the 'giet_config.h' file !
122	#endif
123
124	#if !defined(GIET_ELF_BUFFER_SIZE)
125	# error: The GIET_ELF_BUFFER_SIZE value must be defined in the giet_config.h file !
126	#endif
127
128	////////////////////////////////////////////////////////////////////////////
129	// Global variables for boot code
130	// Both the page tables for the various virtual spaces, and the schedulers
131	// for the processors are physically distributed on the clusters.
132	////////////////////////////////////////////////////////////////////////////
133
134	extern void boot_entry();
135
136	// This global variable is allocated in "fat32.c" file
137	extern fat32_fs_t fat;
138
139	// Page tables virtual base addresses (one per vspace)
140	__attribute__((section (".bootdata")))
141	unsigned int _ptabs_vaddr[GIET_NB_VSPACE_MAX];
142
143	// Page tables physical base addresses (one per vspace / one per cluster)
144	__attribute__((section (".bootdata")))
145	paddr_t _ptabs_paddr[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
146
147	// Page table max_pt2 (one per vspace / one per cluster )
148	__attribute__((section (".bootdata")))
149	unsigned int _ptabs_max_pt2[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
150
151	// Page tables pt2 allocators (one per vspace / one per cluster)
152	__attribute__((section (".bootdata")))
153	unsigned int _ptabs_next_pt2[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
154
155	// Scheduler pointers array (virtual addresses)
156	// indexed by (x,y,lpid) : (((x << Y_WIDTH) + y) * NB_PROCS_MAX) + lpid
157	__attribute__((section (".bootdata")))
158	static_scheduler_t* _schedulers[1<<X_WIDTH][1<<Y_WIDTH][NB_PROCS_MAX];
159
160	// Temporaty buffer used to load one complete .elf file
161	__attribute__((section (".bootdata")))
162	char boot_elf_buffer[GIET_ELF_BUFFER_SIZE] __attribute__((aligned(512)));
163
164	/////////////////////////////////////////////////////////////////////
165	// This function checks consistence beween the mapping_info data
166	// structure (soft), and the giet_config file (hard).
167	/////////////////////////////////////////////////////////////////////
168	void boot_mapping_check()
169	{
170	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
171
172	// checking mapping availability
173	if (header->signature != IN_MAPPING_SIGNATURE)
174	{
175	_puts("\n[BOOT ERROR] Illegal mapping signature: ");
176	_putx(header->signature);
177	_puts("\n");
178	_exit();
179	}
180
181	// checking number of clusters
182	if ( (header->x_size != X_SIZE) \|\|
183	(header->y_size != Y_SIZE) \|\|
184	(header->x_width != X_WIDTH) \|\|
185	(header->y_width != Y_WIDTH) )
186	{
187	_puts("\n[BOOT ERROR] Incoherent X_SIZE or Y_SIZE ");
188	_puts("\n - In hard_config: X_SIZE = ");
189	_putd( X_SIZE );
190	_puts(" / Y_SIZE = ");
191	_putd( Y_SIZE );
192	_puts(" / X_WIDTH = ");
193	_putd( X_WIDTH );
194	_puts(" / Y_WIDTH = ");
195	_putd( Y_WIDTH );
196	_puts("\n - In mapping_info: x_size = ");
197	_putd( header->x_size );
198	_puts(" / y_size = ");
199	_putd( header->y_size );
200	_puts(" / x_width = ");
201	_putd( header->x_width );
202	_puts(" / y_width = ");
203	_putd( header->y_width );
204	_puts("\n");
205	_exit();
206	}
207	// checking number of virtual spaces
208	if (header->vspaces > GIET_NB_VSPACE_MAX)
209	{
210	_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n");
211	_puts("\n");
212	_exit();
213	}
214
215	#if BOOT_DEBUG_MAPPING
216	_puts("\n - x_size = ");
217	_putd( header->x_size );
218	_puts("\n - y_size = ");
219	_putd( header->y_size );
220	_puts("\n - procs = ");
221	_putd( header->procs );
222	_puts("\n - periphs = ");
223	_putd( header->periphs );
224	_puts("\n - vspaces = ");
225	_putd( header->vspaces );
226	_puts("\n - tasks = ");
227	_putd( header->tasks );
228	_puts("\n");
229	_puts("\n - size of header = ");
230	_putd( MAPPING_HEADER_SIZE );
231	_puts("\n - size of cluster = ");
232	_putd( MAPPING_CLUSTER_SIZE );
233	_puts("\n - size of pseg = ");
234	_putd( MAPPING_PSEG_SIZE );
235	_puts("\n - size of proc = ");
236	_putd( MAPPING_PROC_SIZE );
237	_puts("\n - size of vspace = ");
238	_putd( MAPPING_VSPACE_SIZE );
239	_puts("\n - size of vseg = ");
240	_putd( MAPPING_VSEG_SIZE );
241	_puts("\n - size of vobj = ");
242	_putd( MAPPING_VOBJ_SIZE );
243	_puts("\n - size of task = ");
244	_putd( MAPPING_TASK_SIZE );
245	_puts("\n");
246
247	unsigned int cluster_id;
248	mapping_cluster_t * cluster = _get_cluster_base(header);
249	for( cluster_id = 0; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
250	{
251	_puts("\n - cluster[");
252	_putd( cluster[cluster_id].x );
253	_puts(",");
254	_putd( cluster[cluster_id].y );
255	_puts("]\n procs = ");
256	_putd( cluster[cluster_id].procs );
257	_puts("\n psegs = ");
258	_putd( cluster[cluster_id].psegs );
259	_puts("\n periphs = ");
260	_putd( cluster[cluster_id].periphs );
261	_puts("\n");
262	}
263	#endif
264
265	} // end boot_mapping_check()
266
267
268	//////////////////////////////////////////////////////////////////////////////
269	// boot_pseg_get()
270	// This function returns the pointer on a physical segment
271	// identified by the pseg index.
272	//////////////////////////////////////////////////////////////////////////////
273	mapping_pseg_t *boot_pseg_get(unsigned int seg_id)
274	{
275	mapping_header_t* header = (mapping_header_t*)SEG_BOOT_MAPPING_BASE;
276	mapping_pseg_t * pseg = _get_pseg_base(header);
277
278	// checking argument
279	if (seg_id >= header->psegs)
280	{
281	_puts("\n[BOOT ERROR] : seg_id argument too large\n");
282	_puts(" in function boot_pseg_get()\n");
283	_exit();
284	}
285
286	return &pseg[seg_id];
287	}
288
289	//////////////////////////////////////////////////////////////////////////////
290	// boot_add_pte()
291	// This function registers a new PTE in the page table defined
292	// by the vspace_id argument, and the (x,y) coordinates.
293	// It updates both the PT1 and PT2, and a new PT2 is used if required.
294	// As the set of PT2s is implemented as a fixed size array (no dynamic
295	// allocation), this function checks a possible overflow of the PT2 array.
296	//////////////////////////////////////////////////////////////////////////////
297	void boot_add_pte(unsigned int vspace_id,
298	unsigned int x,
299	unsigned int y,
300	unsigned int vpn,
301	unsigned int flags,
302	unsigned int ppn,
303	unsigned int verbose)
304	{
305	unsigned int ix1;
306	unsigned int ix2;
307	paddr_t pt2_pbase; // PT2 physical base address
308	paddr_t pte_paddr; // PTE physical address
309	unsigned int pt2_id; // PT2 index
310	unsigned int ptd; // PTD : entry in PT1
311
312	ix1 = vpn >> 9; // 11 bits
313	ix2 = vpn & 0x1FF; // 9 bits
314
315	// get page table physical base address and size
316	paddr_t pt1_pbase = _ptabs_paddr[vspace_id][x][y];
317	unsigned int max_pt2 = _ptabs_max_pt2[vspace_id][x][y];
318
319	if (max_pt2 == 0)
320	{
321	_puts("Undefined page table for vspace ");
322	_putd(vspace_id);
323	_puts("\n");
324	_exit();
325	}
326
327	// get ptd in PT1
328	ptd = _physical_read(pt1_pbase + 4 * ix1);
329
330	if ((ptd & PTE_V) == 0) // undefined PTD: compute PT2 base address,
331	// and set a new PTD in PT1
332	{
333	pt2_id = _ptabs_next_pt2[vspace_id][x][y];
334	if (pt2_id == max_pt2)
335	{
336	_puts("\n[BOOT ERROR] in boot_add_pte() function\n");
337	_puts("the length of the PTAB vobj is too small\n");
338	_puts(" max_pt2 = ");
339	_putd( max_pt2 );
340	_puts("\n");
341	_puts(" pt2_id = ");
342	_putd( pt2_id );
343	_puts("\n");
344	_exit();
345	}
346
347	pt2_pbase = pt1_pbase + PT1_SIZE + PT2_SIZE * pt2_id;
348	ptd = PTE_V \| PTE_T \| (unsigned int) (pt2_pbase >> 12);
349	_physical_write( pt1_pbase + 4 * ix1, ptd);
350	_ptabs_next_pt2[vspace_id][x][y] = pt2_id + 1;
351	}
352	else // valid PTD: compute PT2 base address
353	{
354	pt2_pbase = ((paddr_t)(ptd & 0x0FFFFFFF)) << 12;
355	}
356
357	// set PTE in PT2 : flags & PPN in two 32 bits words
358	pte_paddr = pt2_pbase + 8 * ix2;
359	_physical_write(pte_paddr , flags);
360	_physical_write(pte_paddr + 4, ppn);
361
362	if (verbose)
363	{
364	_puts(" / vpn = ");
365	_putx( vpn );
366	_puts(" / ix1 = ");
367	_putx( ix1 );
368	_puts(" / ix2 = ");
369	_putx( ix2 );
370	_puts(" / pt1_pbase = ");
371	_putl( pt1_pbase );
372	_puts(" / ptd = ");
373	_putl( ptd );
374	_puts(" / pt2_pbase = ");
375	_putl( pt2_pbase );
376	_puts(" / pte_paddr = ");
377	_putl( pte_paddr );
378	_puts(" / ppn = ");
379	_putx( ppn );
380	_puts("/\n");
381	}
382
383	} // end boot_add_pte()
384
385
386	////////////////////////////////////////////////////////////////////////
387	// This function build the page table(s) for a given vspace.
388	// It build as many pages tables as the number of vobjs having
389	// the PTAB type in the vspace, because page tables can be replicated.
390	// The physical base addresses for all vsegs (global and private)
391	// must have been previously computed and stored in the mapping.
392	//
393	// General rule regarding local / shared vsegs:
394	// - shared vsegs are mapped in all page tables
395	// - local vsegs are mapped only in the "local" page table
396	////////////////////////////////////////////////////////////////////////
397	void boot_vspace_pt_build(unsigned int vspace_id)
398	{
399	unsigned int ptab_id; // global index for a vseg containing a PTAB
400	unsigned int priv_id; // global index for a private vseg in a vspace
401	unsigned int glob_id; // global index for a global vseg
402	unsigned int npages;
403	unsigned int ppn;
404	unsigned int vpn;
405	unsigned int flags;
406	unsigned int page_id;
407	unsigned int verbose = 0; // can be used to activate trace in add_pte()
408
409	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
410	mapping_vspace_t * vspace = _get_vspace_base(header);
411	mapping_vseg_t * vseg = _get_vseg_base(header);
412	mapping_vobj_t * vobj = _get_vobj_base(header);
413	mapping_pseg_t * pseg = _get_pseg_base(header);
414	mapping_cluster_t * cluster = _get_cluster_base(header);
415
416	// external loop on private vsegs to find all PTAB vobjs in vspace
417	for (ptab_id = vspace[vspace_id].vseg_offset;
418	ptab_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
419	ptab_id++)
420	{
421	// get global index of first vobj in vseg
422	unsigned int vobj_id = vseg[ptab_id].vobj_offset;
423
424	if ( vobj[vobj_id].type == VOBJ_TYPE_PTAB )
425	{
426	// get cluster coordinates for the PTAB
427	unsigned int ptab_pseg_id = vseg[ptab_id].psegid;
428	unsigned int ptab_cluster_id = pseg[ptab_pseg_id].clusterid;
429	unsigned int x_ptab = cluster[ptab_cluster_id].x;
430	unsigned int y_ptab = cluster[ptab_cluster_id].y;
431
432	// internal loop on private vsegs to build
433	// the (vspace_id, x_ptab, y_ptab) page table
434	for (priv_id = vspace[vspace_id].vseg_offset;
435	priv_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
436	priv_id++)
437	{
438	// get cluster coordinates for private vseg
439	unsigned int priv_pseg_id = vseg[priv_id].psegid;
440	unsigned int priv_cluster_id = pseg[priv_pseg_id].clusterid;
441	unsigned int x_priv = cluster[priv_cluster_id].x;
442	unsigned int y_priv = cluster[priv_cluster_id].y;
443
444	// only non local or matching private vsegs must be mapped
445	if ( (vseg[priv_id].local == 0 ) \|\|
446	((x_ptab == x_priv) && (y_ptab == y_priv)) )
447	{
448	vpn = vseg[priv_id].vbase >> 12;
449	ppn = (unsigned int) (vseg[priv_id].pbase >> 12);
450	npages = vseg[priv_id].length >> 12;
451	if ((vseg[priv_id].length & 0xFFF) != 0) npages++;
452
453	flags = PTE_V;
454	if (vseg[priv_id].mode & C_MODE_MASK) flags \|= PTE_C;
455	if (vseg[priv_id].mode & X_MODE_MASK) flags \|= PTE_X;
456	if (vseg[priv_id].mode & W_MODE_MASK) flags \|= PTE_W;
457	if (vseg[priv_id].mode & U_MODE_MASK) flags \|= PTE_U;
458
459	// The three flags (Local, Remote and Dirty) are set to 1 to reduce
460	// latency of TLB miss (L/R) and write (D): Avoid hardware update
461	// mechanism for these flags because GIET_VM does use these flags.
462
463	flags \|= PTE_L;
464	flags \|= PTE_R;
465	flags \|= PTE_D;
466
467	#if BOOT_DEBUG_PT
468	_puts(vseg[priv_id].name);
469	_puts(" : flags = ");
470	_putx(flags);
471	_puts(" / npages = ");
472	_putd(npages);
473	_puts(" / pbase = ");
474	_putl(vseg[priv_id].pbase);
475	_puts("\n");
476	#endif
477	// loop on 4K pages
478	for (page_id = 0; page_id < npages; page_id++)
479	{
480	boot_add_pte(vspace_id, x_ptab, y_ptab, vpn, flags, ppn, verbose);
481	vpn++;
482	ppn++;
483	}
484	}
485	} // end internal loop on private vsegs
486
487	// internal loop on global vsegs to build the (x_ptab,y_ptab) page table
488	for (glob_id = 0; glob_id < header->globals; glob_id++)
489	{
490	// get cluster coordinates for global vseg
491	unsigned int glob_pseg_id = vseg[glob_id].psegid;
492	unsigned int glob_cluster_id = pseg[glob_pseg_id].clusterid;
493	unsigned int x_glob = cluster[glob_cluster_id].x;
494	unsigned int y_glob = cluster[glob_cluster_id].y;
495
496	// only non local or matching global vsegs must be mapped
497	if ( (vseg[glob_id].local == 0 ) \|\|
498	((x_ptab == x_glob) && (y_ptab == y_glob)) )
499	{
500	vpn = vseg[glob_id].vbase >> 12;
501	ppn = (unsigned int)(vseg[glob_id].pbase >> 12);
502	npages = vseg[glob_id].length >> 12;
503	if ((vseg[glob_id].length & 0xFFF) != 0) npages++;
504
505	flags = PTE_V;
506	if (vseg[glob_id].mode & C_MODE_MASK) flags \|= PTE_C;
507	if (vseg[glob_id].mode & X_MODE_MASK) flags \|= PTE_X;
508	if (vseg[glob_id].mode & W_MODE_MASK) flags \|= PTE_W;
509	if (vseg[glob_id].mode & U_MODE_MASK) flags \|= PTE_U;
510
511	// Flags set for optimization (as explained above)
512
513	flags \|= PTE_L;
514	flags \|= PTE_R;
515	flags \|= PTE_D;
516
517	#if BOOT_DEBUG_PT
518	_puts(vseg[glob_id].name);
519	_puts(" : flags = ");
520	_putx(flags);
521	_puts(" / npages = ");
522	_putd(npages);
523	_puts(" / pbase = ");
524	_putl(vseg[glob_id].pbase);
525	_puts("\n");
526	#endif
527	// loop on 4K pages
528	for (page_id = 0; page_id < npages; page_id++)
529	{
530	boot_add_pte(vspace_id, x_ptab, y_ptab, vpn, flags, ppn, verbose);
531	vpn++;
532	ppn++;
533	}
534	}
535	} // end internal loop on global vsegs
536
537	_puts("\n[BOOT] Page Table for vspace ");
538	_puts( vspace[vspace_id].name );
539	_puts(" in cluster[");
540	_putd( x_ptab );
541	_puts(",");
542	_putd( y_ptab );
543	_puts("] completed at cycle ");
544	_putd( _get_proctime() );
545	_puts("\n");
546
547	#if BOOT_DEBUG_PT
548	_puts("vaddr = ");
549	_putx( _ptabs_vaddr[vspace_id] );
550	_puts(" / paddr = ");
551	_putl( _ptabs_paddr[vspace_id][x_ptab][y_ptab] );
552	_puts(" / PT2 number = ");
553	_putd( _ptabs_next_pt2[vspace_id][x_ptab][y_ptab] );
554	_puts("\n");
555	#endif
556
557	} // end if PTAB
558	} // end first loop on private vsegs
559	} // end boot_vspace_pt_build()
560
561
562	///////////////////////////////////////////////////////////////////////////
563	// Align the value of paddr or vaddr to the required alignement,
564	// defined by alignPow2 == L2(alignement).
565	///////////////////////////////////////////////////////////////////////////
566	paddr_t paddr_align_to(paddr_t paddr, unsigned int alignPow2)
567	{
568	paddr_t mask = (1 << alignPow2) - 1;
569	return ((paddr + mask) & ~mask);
570	}
571
572	unsigned int vaddr_align_to(unsigned int vaddr, unsigned int alignPow2)
573	{
574	unsigned int mask = (1 << alignPow2) - 1;
575	return ((vaddr + mask) & ~mask);
576	}
577
578	///////////////////////////////////////////////////////////////////////////
579	// Set pbase for a vseg when identity mapping is required.
580	// The length of the vseg must be known.
581	// The ordered linked list of vsegs mapped on pseg is updated,
582	// and overlap with previously mapped vsegs is checked.
583	///////////////////////////////////////////////////////////////////////////
584	void boot_vseg_set_paddr_ident(mapping_vseg_t * vseg)
585	{
586	// checking vseg not already mapped
587	if (vseg->mapped != 0)
588	{
589	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
590	_puts( vseg->name );
591	_puts(" already mapped\n");
592	_exit();
593	}
594
595	// computes selected pseg pointer
596	mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid );
597
598	// computes vseg alignment constraint
599	mapping_header_t* header = (mapping_header_t*)SEG_BOOT_MAPPING_BASE;
600	mapping_vobj_t* vobj_base = _get_vobj_base( header );
601	unsigned int align = vobj_base[vseg->vobj_offset].align;
602	if ( vobj_base[vseg->vobj_offset].align < 12 ) align = 12;
603
604	// computes required_pbase for identity mapping,
605	paddr_t required_pbase = (paddr_t)vseg->vbase;
606
607	// checks identity constraint against alignment constraint
608	if ( paddr_align_to( required_pbase, align) != required_pbase )
609	{
610	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
611	_puts( vseg->name );
612	_puts(" has uncompatible identity and alignment constraints\n");
613	_exit();
614	}
615
616	// We are looking for a contiguous space in target pseg.
617	// If there is vsegs already mapped, we scan the vsegs list to:
618	// - check overlap with already mapped vsegs,
619	// - try mapping in holes between already mapped vsegs,
620	// - update the ordered linked list if success
621	// We don't enter the loop if no vsegs is already mapped.
622	// implementation note: The next_vseg field is unsigned int,
623	// but we use it to store a MIP32 pointer on a vseg...
624
625	mapping_vseg_t* curr = 0;
626	mapping_vseg_t* prev = 0;
627	unsigned int min_pbase = pseg->base;
628
629	for ( curr = (mapping_vseg_t*)pseg->next_vseg ;
630	(curr != 0) && (vseg->mapped == 0) ;
631	curr = (mapping_vseg_t*)curr->next_vseg )
632	{
633	// looking before current vseg
634	if( (required_pbase >= min_pbase) &&
635	(curr->pbase >= (required_pbase + vseg->length)) ) // space found
636	{
637	vseg->pbase = required_pbase;
638	vseg->mapped = 1;
639
640	// update linked list
641	vseg->next_vseg = (unsigned int)curr;
642	if( curr == (mapping_vseg_t*)pseg->next_vseg )
643	pseg->next_vseg = (unsigned int)vseg;
644	else
645	prev->next_vseg = (unsigned int)vseg;
646	}
647	else // looking in space after curr
648	{
649	prev = curr;
650	min_pbase = curr->pbase + curr->length;
651	}
652	}
653
654	// no success in the loop
655	if( (vseg->mapped == 0) &&
656	(required_pbase >= min_pbase) &&
657	((required_pbase + vseg->length) <= (pseg->base + pseg->length)) )
658	{
659	vseg->pbase = required_pbase;
660	vseg->mapped = 1;
661
662	// update linked list
663	vseg->next_vseg = 0;
664	if ((curr == 0) && (prev == 0)) pseg->next_vseg = (unsigned int)vseg;
665	else prev->next_vseg = (unsigned int)vseg;
666	}
667
668	if( vseg->mapped == 0 )
669	{
670	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
671	_puts( vseg->name );
672	_puts(" cannot be mapped on pseg ");
673	_puts( pseg->name );
674	_puts("\n");
675	_exit();
676	}
677	} // end boot_vseg_set_paddr_ident()
678
679
680	////////////////////////////////////////////////////////////////////////////
681	// Set pbase for a vseg when there is no identity mapping constraint.
682	// This is the physical memory allocator (written by Q.Meunier).
683	// The length of the vseg must be known.
684	// All identity mapping vsegs must be already mapped.
685	// We use a linked list of already mapped vsegs, ordered by incresing pbase.
686	// We try to place the vseg in the "first fit" hole in this list.
687	////////////////////////////////////////////////////////////////////////////
688	void boot_vseg_set_paddr(mapping_vseg_t * vseg)
689	{
690	// checking vseg not already mapped
691	if ( vseg->mapped != 0 )
692	{
693	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr() : vseg ");
694	_puts( vseg->name );
695	_puts(" already mapped\n");
696	_exit();
697	}
698
699	// computes selected pseg pointer
700	mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid );
701
702	// computes vseg alignment constraint
703	mapping_header_t* header = (mapping_header_t*)SEG_BOOT_MAPPING_BASE;
704	mapping_vobj_t* vobj_base = _get_vobj_base( header );
705	unsigned int align = vobj_base[vseg->vobj_offset].align;
706	if ( vobj_base[vseg->vobj_offset].align < 12 ) align = 12;
707
708	// initialise physical base address, with alignment constraint
709	paddr_t possible_pbase = paddr_align_to( pseg->base, align );
710
711	// We are looking for a contiguous space in target pseg
712	// If there is vsegs already mapped, we scan the vsegs list to:
713	// - try mapping in holes between already mapped vsegs,
714	// - update the ordered linked list if success
715	// We don't enter the loop if no vsegs is already mapped.
716	// implementation note: The next_vseg field is unsigned int,
717	// but we use it to store a MIP32 pointer on a vseg...
718
719	mapping_vseg_t* curr = 0;
720	mapping_vseg_t* prev = 0;
721
722	for( curr = (mapping_vseg_t*)pseg->next_vseg ;
723	(curr != 0) && (vseg->mapped == 0) ;
724	curr = (mapping_vseg_t*)curr->next_vseg )
725	{
726	// looking for space before current vseg
727	if ( (curr->pbase >= possible_pbase + vseg->length) ) // space before curr
728	{
729	vseg->pbase = possible_pbase;
730	vseg->mapped = 1;
731
732	// update linked list
733	vseg->next_vseg = (unsigned int)curr;
734	if( curr == (mapping_vseg_t*)pseg->next_vseg )
735	pseg->next_vseg = (unsigned int)vseg;
736	else
737	prev->next_vseg = (unsigned int)vseg;
738	}
739	else // looking for space after curr
740	{
741	possible_pbase = paddr_align_to( curr->pbase + curr->length, align );
742	prev = curr;
743	}
744	}
745
746	// when no space found, try to allocate space after already mapped vsegs
747	if( (vseg->mapped == 0) &&
748	((possible_pbase + vseg->length) <= (pseg->base + pseg->length)) )
749	{
750	vseg->pbase = possible_pbase;
751	vseg->mapped = 1;
752
753	// update linked list
754	vseg->next_vseg = 0;
755	if ((curr == 0 ) && (prev == 0)) pseg->next_vseg = (unsigned int)vseg;
756	else prev->next_vseg = (unsigned int)vseg;
757	}
758
759	if( vseg->mapped == 0 )
760	{
761	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr() : vseg ");
762	_puts( vseg->name );
763	_puts(" cannot be mapped on pseg ");
764	_puts( pseg->name );
765	_puts(" in cluster[");
766	_putd( pseg->clusterid );
767	_puts("]\n");
768	_exit();
769	}
770	} // end boot_vseg_set_paddr()
771
772	///////////////////////////////////////////////////////////////////////////
773	// This function computes the physical base address for a vseg
774	// as specified in the mapping info data structure.
775	// It updates the pbase and the length fields of the vseg.
776	// It updates the pbase and vbase fields of all vobjs in the vseg.
777	// It updates the _ptabs_paddr[] and _ptabs_vaddr[], _ptabs_max_pt2[],
778	// and _ptabs_next_pt2[] arrays.
779	// It is a global vseg if vspace_id = (-1).
780	///////////////////////////////////////////////////////////////////////////
781	void boot_vseg_map(mapping_vseg_t * vseg, unsigned int vspace_id)
782	{
783	unsigned int vobj_id;
784	unsigned int cur_vaddr;
785	paddr_t cur_paddr;
786	paddr_t cur_length;
787	unsigned int offset;
788
789	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
790	mapping_vobj_t * vobj = _get_vobj_base(header);
791
792	// first loop on the vobjs contained in vseg to compute
793	// the vseg length, required for mapping.
794	cur_length = 0;
795	for ( vobj_id = vseg->vobj_offset;
796	vobj_id < (vseg->vobj_offset + vseg->vobjs);
797	vobj_id++ )
798	{
799	if (vobj[vobj_id].align)
800	{
801	cur_length = vaddr_align_to(cur_length, vobj[vobj_id].align);
802	}
803	cur_length += vobj[vobj_id].length;
804	}
805	vseg->length = paddr_align_to(cur_length, 12);
806
807	// mapping: computes vseg pbase address
808	if (vseg->ident != 0) // identity mapping
809	{
810	boot_vseg_set_paddr_ident( vseg );
811	}
812	else // unconstrained mapping
813	{
814	boot_vseg_set_paddr( vseg );
815	}
816
817	// second loop on vobjs contained in vseg to :
818	// initialize the vaddr and paddr fields of all vobjs,
819	// and initialize the page table pointers arrays
820
821	cur_vaddr = vseg->vbase;
822	cur_paddr = vseg->pbase;
823
824	for (vobj_id = vseg->vobj_offset;
825	vobj_id < (vseg->vobj_offset + vseg->vobjs); vobj_id++)
826	{
827	if (vobj[vobj_id].align)
828	{
829	cur_paddr = paddr_align_to(cur_paddr, vobj[vobj_id].align);
830	cur_vaddr = vaddr_align_to(cur_vaddr, vobj[vobj_id].align);
831	}
832	// set vaddr/paddr for current vobj
833	vobj[vobj_id].vaddr = cur_vaddr;
834	vobj[vobj_id].paddr = cur_paddr;
835
836	// initialize _ptabs_vaddr[] , _ptabs-paddr[] , _ptabs_max_pt2[] if PTAB
837	if (vobj[vobj_id].type == VOBJ_TYPE_PTAB)
838	{
839	if (vspace_id == ((unsigned int) -1)) // global vseg
840	{
841	_puts("\n[BOOT ERROR] in boot_vseg_map() function: ");
842	_puts("a PTAB vobj cannot be global");
843	_exit();
844	}
845	// we need at least one PT2
846	if (vobj[vobj_id].length < (PT1_SIZE + PT2_SIZE))
847	{
848	_puts("\n[BOOT ERROR] in boot_vseg_map() function, ");
849	_puts("PTAB too small, minumum size is: ");
850	_putx(PT1_SIZE + PT2_SIZE);
851	_exit();
852	}
853	// get cluster coordinates for PTAB
854	unsigned int cluster_xy = (unsigned int)(cur_paddr>>32);
855	unsigned int x = cluster_xy >> Y_WIDTH;
856	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
857
858	// register physical and virtual page table addresses, size, and next PT2
859	_ptabs_vaddr[vspace_id] = vobj[vobj_id].vaddr;
860	_ptabs_paddr[vspace_id][x][y] = vobj[vobj_id].paddr;
861	_ptabs_max_pt2[vspace_id][x][y] = (vobj[vobj_id].length - PT1_SIZE) / PT2_SIZE;
862	_ptabs_next_pt2[vspace_id][x][y] = 0;
863
864	// reset all valid bits in PT1
865	for ( offset = 0 ; offset < 8192 ; offset = offset + 4)
866	{
867	_physical_write(cur_paddr + offset, 0);
868	}
869	}
870
871	// set next vaddr/paddr
872	cur_vaddr = cur_vaddr + vobj[vobj_id].length;
873	cur_paddr = cur_paddr + vobj[vobj_id].length;
874	} // end for vobjs
875
876	} // end boot_vseg_map()
877
878	///////////////////////////////////////////////////////////////////////////
879	// This function builds the page tables for all virtual spaces
880	// defined in the mapping_info data structure, in three steps:
881	// - step 1 : It computes the physical base address for global vsegs
882	// and for all associated vobjs.
883	// - step 2 : It computes the physical base address for all private
884	// vsegs and all vobjs in each virtual space.
885	// - step 3 : It actually fill the page table(s) for each vspace.
886	//
887	// It must exist at least one vspace in the mapping.
888	// For each vspace, it can exist one page table per cluster.
889	///////////////////////////////////////////////////////////////////////////
890	void boot_pt_init()
891	{
892	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
893	mapping_vspace_t * vspace = _get_vspace_base(header);
894	mapping_vseg_t * vseg = _get_vseg_base(header);
895
896	unsigned int vspace_id;
897	unsigned int vseg_id;
898
899	if (header->vspaces == 0 )
900	{
901	_puts("\n[BOOT ERROR] in boot_pt_init() : mapping ");
902	_puts( header->name );
903	_puts(" contains no vspace\n");
904	_exit();
905	}
906
907	#if BOOT_DEBUG_PT
908	_puts("\n[BOOT DEBUG] **** mapping global vsegs ****\n");
909	#endif
910
911	//////////////////////////////////
912	// step 1 : loop on global vsegs
913
914	// vsegs with identity mapping constraint first
915	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
916	{
917	if (vseg[vseg_id].ident == 1)
918	boot_vseg_map(&vseg[vseg_id], ((unsigned int) (-1)));
919	}
920
921	// unconstrained vsegs second
922	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
923	{
924	if (vseg[vseg_id].ident == 0)
925	boot_vseg_map(&vseg[vseg_id], ((unsigned int) (-1)));
926	}
927
928	////////////////////////////////////////////////////////////
929	// step 2 : loop on virtual vspaces to map private vsegs
930
931	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
932	{
933
934	#if BOOT_DEBUG_PT
935	_puts("\n[BOOT DEBUG] ****** mapping private vsegs in vspace ");
936	_puts(vspace[vspace_id].name);
937	_puts(" ******\n");
938	#endif
939
940	for (vseg_id = vspace[vspace_id].vseg_offset;
941	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
942	vseg_id++)
943	{
944	// private vsegs cannot be identity mapping
945	if (vseg[vseg_id].ident != 0)
946	{
947	_puts("\n[BOOT ERROR] in boot_pt_init() : vspace ");
948	_puts( vspace[vspace_id].name );
949	_puts(" contains vseg with identity mapping\n");
950	_exit();
951	}
952
953	boot_vseg_map(&vseg[vseg_id], vspace_id);
954	}
955	}
956
957	#if BOOT_DEBUG_PT
958	mapping_vseg_t* curr;
959	mapping_pseg_t* pseg = _get_pseg_base(header);
960	mapping_cluster_t* cluster = _get_cluster_base(header);
961	unsigned int pseg_id;
962	for( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ )
963	{
964	unsigned int cluster_id = pseg[pseg_id].clusterid;
965	_puts("\n[BOOT DEBUG] ****** vsegs mapped on pseg ");
966	_puts( pseg[pseg_id].name );
967	_puts(" in cluster[");
968	_putd( cluster[cluster_id].x );
969	_puts(",");
970	_putd( cluster[cluster_id].y );
971	_puts("] ******\n");
972	for( curr = (mapping_vseg_t*)pseg[pseg_id].next_vseg ;
973	curr != 0 ;
974	curr = (mapping_vseg_t*)curr->next_vseg )
975	{
976	_puts(" - vseg ");
977	_puts( curr->name );
978	_puts(" : len = ");
979	_putx( curr->length );
980	_puts(" / vbase ");
981	_putx( curr->vbase );
982	_puts(" / pbase ");
983	_putl( curr->pbase );
984	_puts("\n");
985	}
986	}
987	#endif
988
989	/////////////////////////////////////////////////////////////
990	// step 3 : loop on the vspaces to build the page tables
991	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
992	{
993
994	#if BOOT_DEBUG_PT
995	_puts("\n[BOOT DEBUG] ****** building page table for vspace ");
996	_puts(vspace[vspace_id].name);
997	_puts(" ******\n");
998	#endif
999
1000	boot_vspace_pt_build(vspace_id);
1001
1002	}
1003	} // end boot_pt_init()
1004
1005	///////////////////////////////////////////////////////////////////////////////
1006	// This function initializes all private vobjs defined in the vspaces,
1007	// such as mwmr channels, barriers and locks, because these vobjs
1008	// are not known, and not initialized by the compiler.
1009	// The MMU is supposed to be activated...
1010	///////////////////////////////////////////////////////////////////////////////
1011	void boot_vobjs_init()
1012	{
1013	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1014	mapping_vspace_t* vspace = _get_vspace_base(header);
1015	mapping_vobj_t* vobj = _get_vobj_base(header);
1016
1017	unsigned int vspace_id;
1018	unsigned int vobj_id;
1019
1020	// loop on the vspaces
1021	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1022	{
1023
1024	#if BOOT_DEBUG_VOBJS
1025	_puts("\n[BOOT DEBUG] ****** vobjs initialisation in vspace ");
1026	_puts(vspace[vspace_id].name);
1027	_puts(" ******\n");
1028	#endif
1029
1030	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id][0][0] >> 13) );
1031
1032	unsigned int ptab_found = 0;
1033
1034	// loop on the vobjs
1035	for (vobj_id = vspace[vspace_id].vobj_offset;
1036	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1037	vobj_id++)
1038	{
1039	switch (vobj[vobj_id].type)
1040	{
1041	case VOBJ_TYPE_MWMR: // storage capacity is (vobj.length/4 - 5) words
1042	{
1043	#if BOOT_DEBUG_VOBJS
1044	_puts("MWMR : ");
1045	_puts(vobj[vobj_id].name);
1046	_puts(" / vaddr = ");
1047	_putx(vobj[vobj_id].vaddr);
1048	_puts(" / paddr = ");
1049	_putl(vobj[vobj_id].paddr);
1050	_puts(" / length = ");
1051	_putx(vobj[vobj_id].length);
1052	_puts("\n");
1053	#endif
1054	mwmr_channel_t* mwmr = (mwmr_channel_t *) (vobj[vobj_id].vaddr);
1055	mwmr->ptw = 0;
1056	mwmr->ptr = 0;
1057	mwmr->sts = 0;
1058	mwmr->width = vobj[vobj_id].init;
1059	mwmr->depth = (vobj[vobj_id].length >> 2) - 6;
1060	mwmr->lock = 0;
1061	#if BOOT_DEBUG_VOBJS
1062	_puts(" fifo depth = ");
1063	_putd(mwmr->depth);
1064	_puts(" / width = ");
1065	_putd(mwmr->width);
1066	_puts("\n");
1067	#endif
1068	break;
1069	}
1070	case VOBJ_TYPE_ELF: // initialisation done by the loader
1071	{
1072	#if BOOT_DEBUG_VOBJS
1073	_puts("ELF : ");
1074	_puts(vobj[vobj_id].name);
1075	_puts(" / vaddr = ");
1076	_putx(vobj[vobj_id].vaddr);
1077	_puts(" / paddr = ");
1078	_putl(vobj[vobj_id].paddr);
1079	_puts(" / length = ");
1080	_putx(vobj[vobj_id].length);
1081	_puts("\n");
1082	#endif
1083	break;
1084	}
1085	case VOBJ_TYPE_BLOB: // initialisation done by the loader
1086	{
1087	#if BOOT_DEBUG_VOBJS
1088	_puts("BLOB : ");
1089	_puts(vobj[vobj_id].name);
1090	_puts(" / vaddr = ");
1091	_putx(vobj[vobj_id].vaddr);
1092	_puts(" / paddr = ");
1093	_putl(vobj[vobj_id].paddr);
1094	_puts(" / length = ");
1095	_putx(vobj[vobj_id].length);
1096	_puts("\n");
1097	#endif
1098	break;
1099	}
1100	case VOBJ_TYPE_BARRIER: // init is the number of participants
1101	{
1102	#if BOOT_DEBUG_VOBJS
1103	_puts("BARRIER : ");
1104	_puts(vobj[vobj_id].name);
1105	_puts(" / vaddr = ");
1106	_putx(vobj[vobj_id].vaddr);
1107	_puts(" / paddr = ");
1108	_putl(vobj[vobj_id].paddr);
1109	_puts(" / length = ");
1110	_putx(vobj[vobj_id].length);
1111	_puts("\n");
1112	#endif
1113	giet_barrier_t* barrier = (giet_barrier_t *) (vobj[vobj_id].vaddr);
1114	barrier->count = vobj[vobj_id].init;
1115	barrier->ntasks = vobj[vobj_id].init;
1116	barrier->sense = 0;
1117	#if BOOT_DEBUG_VOBJS
1118	_puts(" init_value = ");
1119	_putd(barrier->init);
1120	_puts("\n");
1121	#endif
1122	break;
1123	}
1124	case VOBJ_TYPE_LOCK: // init value is "not taken"
1125	{
1126	#if BOOT_DEBUG_VOBJS
1127	_puts("LOCK : ");
1128	_puts(vobj[vobj_id].name);
1129	_puts(" / vaddr = ");
1130	_putx(vobj[vobj_id].vaddr);
1131	_puts(" / paddr = ");
1132	_putl(vobj[vobj_id].paddr);
1133	_puts(" / length = ");
1134	_putx(vobj[vobj_id].length);
1135	_puts("\n");
1136	#endif
1137	unsigned int* lock = (unsigned int *) (vobj[vobj_id].vaddr);
1138	*lock = 0;
1139	break;
1140	}
1141	case VOBJ_TYPE_BUFFER: // nothing to initialise
1142	{
1143	#if BOOT_DEBUG_VOBJS
1144	_puts("BUFFER : ");
1145	_puts(vobj[vobj_id].name);
1146	_puts(" / vaddr = ");
1147	_putx(vobj[vobj_id].vaddr);
1148	_puts(" / paddr = ");
1149	_putl(vobj[vobj_id].paddr);
1150	_puts(" / length = ");
1151	_putx(vobj[vobj_id].length);
1152	_puts("\n");
1153	#endif
1154	break;
1155	}
1156	case VOBJ_TYPE_MEMSPACE:
1157	{
1158	#if BOOT_DEBUG_VOBJS
1159	_puts("MEMSPACE : ");
1160	_puts(vobj[vobj_id].name);
1161	_puts(" / vaddr = ");
1162	_putx(vobj[vobj_id].vaddr);
1163	_puts(" / paddr = ");
1164	_putl(vobj[vobj_id].paddr);
1165	_puts(" / length = ");
1166	_putx(vobj[vobj_id].length);
1167	_puts("\n");
1168	#endif
1169	giet_memspace_t* memspace = (giet_memspace_t *) vobj[vobj_id].vaddr;
1170	memspace->buffer = (void *) vobj[vobj_id].vaddr + 8;
1171	memspace->size = vobj[vobj_id].length - 8;
1172	#if BOOT_DEBUG_VOBJS
1173	_puts(" buffer vbase = ");
1174	_putx((unsigned int)memspace->buffer);
1175	_puts(" / size = ");
1176	_putx(memspace->size);
1177	_puts("\n");
1178	#endif
1179	break;
1180	}
1181	case VOBJ_TYPE_PTAB: // nothing to initialize
1182	{
1183	#if BOOT_DEBUG_VOBJS
1184	_puts("PTAB : ");
1185	_puts(vobj[vobj_id].name);
1186	_puts(" / vaddr = ");
1187	_putx(vobj[vobj_id].vaddr);
1188	_puts(" / paddr = ");
1189	_putl(vobj[vobj_id].paddr);
1190	_puts(" / length = ");
1191	_putx(vobj[vobj_id].length);
1192	_puts("\n");
1193	#endif
1194	ptab_found = 1;
1195	break;
1196	}
1197	case VOBJ_TYPE_CONST:
1198	{
1199	#if BOOT_DEBUG_VOBJS
1200	_puts("CONST : ");
1201	_puts(vobj[vobj_id].name);
1202	_puts(" / vaddr = ");
1203	_putx(vobj[vobj_id].vaddr);
1204	_puts(" / paddr = ");
1205	_putl(vobj[vobj_id].paddr);
1206	_puts(" / length = ");
1207	_putx(vobj[vobj_id].length);
1208	_puts(" / init = ");
1209	_putx(vobj[vobj_id].init);
1210	_puts("\n");
1211	#endif
1212	unsigned int* addr = (unsigned int *) vobj[vobj_id].vaddr;
1213	*addr = vobj[vobj_id].init;
1214
1215	#if BOOT_DEBUG_VOBJS
1216	_puts(" init = ");
1217	_putx(*addr);
1218	_puts("\n");
1219	#endif
1220	break;
1221	}
1222	default:
1223	{
1224	_puts("\n[BOOT ERROR] illegal vobj type: ");
1225	_putd(vobj[vobj_id].type);
1226	_puts("\n");
1227	_exit();
1228	}
1229	} // end switch type
1230	} // end loop on vobjs
1231	if (ptab_found == 0)
1232	{
1233	_puts("\n[BOOT ERROR] Missing PTAB for vspace ");
1234	_putd(vspace_id);
1235	_exit();
1236	}
1237	} // end loop on vspaces
1238
1239	} // end boot_vobjs_init()
1240
1241	///////////////////////////////////////////////////////////////////////////////
1242	// This function returns in the vbase and length buffers the virtual base
1243	// address and the length of the segment allocated to the schedulers array
1244	// in the cluster defined by the clusterid argument.
1245	///////////////////////////////////////////////////////////////////////////////
1246	void boot_get_sched_vaddr( unsigned int cluster_id,
1247	unsigned int* vbase,
1248	unsigned int* length )
1249	{
1250	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1251	mapping_vobj_t* vobj = _get_vobj_base(header);
1252	mapping_vseg_t* vseg = _get_vseg_base(header);
1253	mapping_pseg_t* pseg = _get_pseg_base(header);
1254
1255	unsigned int vseg_id;
1256	unsigned int found = 0;
1257
1258	for ( vseg_id = 0 ; (vseg_id < header->vsegs) && (found == 0) ; vseg_id++ )
1259	{
1260	if ( (vobj[vseg[vseg_id].vobj_offset].type == VOBJ_TYPE_SCHED) &&
1261	(pseg[vseg[vseg_id].psegid].clusterid == cluster_id ) )
1262	{
1263	*vbase = vseg[vseg_id].vbase;
1264	*length = vobj[vseg[vseg_id].vobj_offset].length;
1265	found = 1;
1266	}
1267	}
1268	if ( found == 0 )
1269	{
1270	mapping_cluster_t* cluster = _get_cluster_base(header);
1271	_puts("\n[BOOT ERROR] No vobj of type SCHED in cluster [");
1272	_putd( cluster[cluster_id].x );
1273	_puts(",");
1274	_putd( cluster[cluster_id].y );
1275	_puts("]\n");
1276	_exit();
1277	}
1278	} // end boot_get_sched_vaddr()
1279
1280	////////////////////////////////////////////////////////////////////////////////////
1281	// This function initialises all processors schedulers.
1282	// This is done by processor 0, and the MMU must be activated.
1283	// - In Step 1, it initialises the _schedulers[] pointers array, and scan
1284	// the processors to initialise the schedulers, including the
1285	// idle_task context (ltid == 14) and HWI / SWI / PTI vectors.
1286	// - In Step 2, it scan all tasks in all vspaces to complete the tasks contexts,
1287	// initialisation as specified in the mapping_info data structure.
1288	////////////////////////////////////////////////////////////////////////////////////
1289	void boot_schedulers_init()
1290	{
1291	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1292	mapping_cluster_t* cluster = _get_cluster_base(header);
1293	mapping_vspace_t* vspace = _get_vspace_base(header);
1294	mapping_task_t* task = _get_task_base(header);
1295	mapping_vobj_t* vobj = _get_vobj_base(header);
1296	mapping_periph_t* periph = _get_periph_base(header);
1297	mapping_irq_t* irq = _get_irq_base(header);
1298
1299	unsigned int cluster_id; // cluster index in mapping_info
1300	unsigned int periph_id; // peripheral index in mapping_info
1301	unsigned int irq_id; // irq index in mapping_info
1302	unsigned int vspace_id; // vspace index in mapping_info
1303	unsigned int task_id; // task index in mapping_info
1304	unsigned int vobj_id; // vobj index in mapping_info
1305
1306	unsigned int lpid; // local processor index (for several loops)
1307
1308	// TTY, NIC, CMA, HBA, user timer, and WTI channel allocators to user tasks:
1309	// - TTY[0] is reserved for the kernel
1310	// - In all clusters the first NB_PROCS_MAX timers
1311	// are reserved for the kernel (context switch)
1312	unsigned int alloc_tty_channel = 1; // global
1313	unsigned int alloc_nic_channel = 0; // global
1314	unsigned int alloc_cma_channel = 0; // global
1315	unsigned int alloc_hba_channel = 0; // global
1316	unsigned int alloc_tim_channel[X_SIZE*Y_SIZE]; // one per cluster
1317
1318	// WTI allocators to processors
1319	// In all clusters, first NB_PROCS_MAX WTIs are for WAKUP
1320	unsigned int alloc_wti_channel[X_SIZE*Y_SIZE]; // one per cluster
1321
1322	// pointers on the XCU and PIC peripherals
1323	mapping_periph_t* xcu = NULL;
1324	mapping_periph_t* pic = NULL;
1325
1326	// schedulers array base address in a cluster
1327	unsigned int sched_vbase;
1328	unsigned int sched_length;
1329	static_scheduler_t* psched;
1330
1331	/////////////////////////////////////////////////////////////////////////
1332	// Step 1 : loop on the clusters and on the processors
1333	// to initialize the schedulers[] array of pointers,
1334	// and the interrupt vectors.
1335	// Implementation note:
1336	// We need to use both (proc_id) to scan the mapping info structure,
1337	// and (x,y,lpid) to access the schedulers array.
1338
1339	for (cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
1340	{
1341	unsigned int x = cluster[cluster_id].x;
1342	unsigned int y = cluster[cluster_id].y;
1343
1344	#if BOOT_DEBUG_SCHED
1345	_puts("\n[BOOT DEBUG] Initialise schedulers in cluster[");
1346	_putd( x );
1347	_puts(",");
1348	_putd( y );
1349	_puts("]\n");
1350	#endif
1351	alloc_tim_channel[cluster_id] = NB_PROCS_MAX;
1352	alloc_wti_channel[cluster_id] = NB_PROCS_MAX;
1353
1354	// checking processors number
1355	if ( cluster[cluster_id].procs > NB_PROCS_MAX )
1356	{
1357	_puts("\n[BOOT ERROR] Too much processors in cluster[");
1358	_putd( x );
1359	_puts(",");
1360	_putd( y );
1361	_puts("]\n");
1362	_exit();
1363	}
1364
1365	// no schedulers initialisation if nprocs == 0
1366	if ( cluster[cluster_id].procs > 0 )
1367	{
1368	// get scheduler array virtual base address from mapping
1369	boot_get_sched_vaddr( cluster_id, &sched_vbase, &sched_length );
1370
1371	if ( sched_length < (cluster[cluster_id].procs<<12) ) // 4 Kbytes per scheduler
1372	{
1373	_puts("\n[BOOT ERROR] Schedulers segment too small in cluster[");
1374	_putd( x );
1375	_puts(",");
1376	_putd( y );
1377	_puts("]\n");
1378	_exit();
1379	}
1380
1381	psched = (static_scheduler_t*)sched_vbase;
1382
1383	// scan peripherals to find the ICU/XCU and the PIC component
1384
1385	xcu = NULL;
1386	for ( periph_id = cluster[cluster_id].periph_offset ;
1387	periph_id < cluster[cluster_id].periph_offset + cluster[cluster_id].periphs;
1388	periph_id++ )
1389	{
1390	if( (periph[periph_id].type == PERIPH_TYPE_XCU) \|\|
1391	(periph[periph_id].type == PERIPH_TYPE_ICU) )
1392	{
1393	xcu = &periph[periph_id];
1394
1395	if ( xcu->arg < cluster[cluster_id].procs )
1396	{
1397	_puts("\n[BOOT ERROR] Not enough inputs for XCU[");
1398	_putd( x );
1399	_puts(",");
1400	_putd( y );
1401	_puts("]\n");
1402	_exit();
1403	}
1404	}
1405	if( periph[periph_id].type == PERIPH_TYPE_PIC )
1406	{
1407	pic = &periph[periph_id];
1408	}
1409	}
1410	if ( xcu == NULL )
1411	{
1412	_puts("\n[BOOT ERROR] No ICU / XCU component in cluster[");
1413	_putd( x );
1414	_puts(",");
1415	_putd( y );
1416	_puts("]\n");
1417	_exit();
1418	}
1419
1420	// loop on processors for sechedulers default values
1421	// initialisation, including WTI and PTI vectors
1422	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1423	{
1424	// set the schedulers pointers array
1425	_schedulers[x][y][lpid] = (static_scheduler_t*)&psched[lpid];
1426
1427	#if BOOT_DEBUG_SCHED
1428	_puts("\nProc[");
1429	_putd( x );
1430	_puts(",");
1431	_putd( y );
1432	_puts(",");
1433	_putd( lpid );
1434	_puts("] : scheduler virtual base address = ");
1435	_putx( (unsigned int)&psched[lpid] );
1436	_puts("\n");
1437	#endif
1438	// initialise the "tasks" and "current" variables default values
1439	psched[lpid].tasks = 0;
1440	psched[lpid].current = IDLE_TASK_INDEX;
1441
1442	// default values for HWI / PTI / SWI vectors (valid bit = 0)
1443	unsigned int slot;
1444	for (slot = 0; slot < 32; slot++)
1445	{
1446	psched[lpid].hwi_vector[slot] = 0;
1447	psched[lpid].pti_vector[slot] = 0;
1448	psched[lpid].wti_vector[slot] = 0;
1449	}
1450
1451	// WTI[lpid] <= ISR_WAKUP / PTI[lpid] <= ISR_TICK
1452	psched[lpid].wti_vector[lpid] = ISR_WAKUP \| 0x80000000;
1453	psched[lpid].pti_vector[lpid] = ISR_TICK \| 0x80000000;
1454
1455	// initializes the idle_task context in scheduler:
1456	// - the SR slot is 0xFF03 because this task run in kernel mode.
1457	// - it uses the page table of vspace[0]
1458	// - it uses the kernel TTY terminal
1459	// - slots containing addresses (SP, RA, EPC, PTAB, PTPR)
1460	// must be re-initialised by kernel_parallel_init()
1461
1462	psched[lpid].context[IDLE_TASK_INDEX][CTX_CR_ID] = 0;
1463	psched[lpid].context[IDLE_TASK_INDEX][CTX_SR_ID] = 0xFF03;
1464	psched[lpid].context[IDLE_TASK_INDEX][CTX_PTPR_ID] = _ptabs_paddr[0][x][y]>>13;
1465	psched[lpid].context[IDLE_TASK_INDEX][CTX_PTAB_ID] = _ptabs_vaddr[0];
1466	psched[lpid].context[IDLE_TASK_INDEX][CTX_TTY_ID] = 0;
1467	psched[lpid].context[IDLE_TASK_INDEX][CTX_LTID_ID] = IDLE_TASK_INDEX;
1468	psched[lpid].context[IDLE_TASK_INDEX][CTX_VSID_ID] = 0;
1469	psched[lpid].context[IDLE_TASK_INDEX][CTX_RUN_ID] = 1;
1470	} // end for processors
1471
1472	// scan HWIs connected to local XCU
1473	// for round-robin allocation to processors
1474	lpid = 0;
1475	for ( irq_id = xcu->irq_offset ;
1476	irq_id < xcu->irq_offset + xcu->irqs ;
1477	irq_id++ )
1478	{
1479	unsigned int type = irq[irq_id].srctype;
1480	unsigned int srcid = irq[irq_id].srcid;
1481	unsigned int isr = irq[irq_id].isr & 0xFFFF;
1482	unsigned int channel = irq[irq_id].channel << 16;
1483
1484	if ( (type != IRQ_TYPE_HWI) \|\| (srcid > 31) )
1485	{
1486	_puts("\n[BOOT ERROR] Bad IRQ in XCU of cluster[");
1487	_putd( x );
1488	_puts(",");
1489	_putd( y );
1490	_puts("]\n");
1491	_exit();
1492	}
1493
1494	psched[lpid].hwi_vector[srcid] = isr \| channel \| 0x80000000;
1495	lpid = (lpid + 1) % cluster[cluster_id].procs;
1496
1497	} // end for irqs
1498	} // end if nprocs > 0
1499	} // end for clusters
1500
1501	// If there is an external PIC component, we scan HWIs connected to PIC
1502	// for Round Robin allocation (as WTI) to processors.
1503	// We allocate one WTI per processor, starting from proc[0,0,0],
1504	// and we increment (cluster_id, lpid) as required.
1505	if ( pic != NULL )
1506	{
1507	unsigned int cluster_id = 0; // index in clusters array
1508	unsigned int lpid = 0; // processor local index
1509
1510	// scan IRQS defined in PIC
1511	for ( irq_id = pic->irq_offset ;
1512	irq_id < pic->irq_offset + pic->irqs ;
1513	irq_id++ )
1514	{
1515	// compute next values for (cluster_id,lpid)
1516	// if no more procesor available in current cluster
1517	unsigned int overflow = 0;
1518	while ( (lpid >= cluster[cluster_id].procs) \|\|
1519	(alloc_wti_channel[cluster_id] >= xcu->arg) )
1520	{
1521	overflow++;
1522	cluster_id = (cluster_id + 1) % (X_SIZE*Y_SIZE);
1523	lpid = 0;
1524
1525	// overflow detection
1526	if ( overflow > (X_SIZEY_SIZENB_PROCS_MAX*32) )
1527	{
1528	_puts("\n[BOOT ERROR] Not enough processors for external IRQs\n");
1529	_exit();
1530	}
1531	}
1532
1533	unsigned int type = irq[irq_id].srctype;
1534	unsigned int srcid = irq[irq_id].srcid;
1535	unsigned int isr = irq[irq_id].isr & 0xFFFF;
1536	unsigned int channel = irq[irq_id].channel << 16;
1537
1538	if ( (type != IRQ_TYPE_HWI) \|\| (srcid > 31) )
1539	{
1540	_puts("\n[BOOT ERROR] Bad IRQ in PIC component\n");
1541	_exit();
1542	}
1543
1544	// get scheduler[cluster_id] address
1545	unsigned int x = cluster[cluster_id].x;
1546	unsigned int y = cluster[cluster_id].y;
1547	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1548	psched = _schedulers[x][y][0];
1549
1550	// update WTI vector for scheduler[cluster_id][lpid]
1551	unsigned int index = alloc_wti_channel[cluster_id];
1552	psched[lpid].wti_vector[index] = isr \| channel \| 0x80000000;
1553	alloc_wti_channel[cluster_id] = index + 1;
1554	lpid = lpid + 1;
1555
1556	// update IRQ fields in mapping for PIC initialisation
1557	irq[irq_id].dest_id = index;
1558	irq[irq_id].dest_xy = cluster_xy;
1559
1560	} // end for IRQs
1561	} // end if PIC
1562
1563	#if BOOT_DEBUG_SCHED
1564	for ( cluster_id = 0 ; cluster_id < (X_SIZE*Y_SIZE) ; cluster_id++ )
1565	{
1566	unsigned int x = cluster[cluster_id].x;
1567	unsigned int y = cluster[cluster_id].y;
1568	psched = _schedulers[x][y][0];
1569	unsigned int slot;
1570	unsigned int entry;
1571	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1572	{
1573	_puts("\n*** IRQS for proc[");
1574	_putd( x );
1575	_puts(",");
1576	_putd( y );
1577	_puts(",");
1578	_putd( lpid );
1579	_puts("]\n");
1580	for ( slot = 0 ; slot < 32 ; slot++ )
1581	{
1582	entry = psched[lpid].hwi_vector[slot];
1583	if ( entry & 0x80000000 )
1584	{
1585	_puts(" - HWI ");
1586	_putd( slot );
1587	_puts(" / isrtype = ");
1588	_putd( entry & 0xFFFF );
1589	_puts(" / channel = ");
1590	_putd( (entry >> 16) & 0x7FFF );
1591	_puts("\n");
1592	}
1593	}
1594	for ( slot = 0 ; slot < 32 ; slot++ )
1595	{
1596	entry = psched[lpid].wti_vector[slot];
1597	if ( entry & 0x80000000 )
1598	{
1599	_puts(" - WTI ");
1600	_putd( slot );
1601	_puts(" / isrtype = ");
1602	_putd( entry & 0xFFFF );
1603	_puts(" / channel = ");
1604	_putd( (entry >> 16) & 0x7FFF );
1605	_puts("\n");
1606	}
1607	}
1608	for ( slot = 0 ; slot < 32 ; slot++ )
1609	{
1610	entry = psched[lpid].pti_vector[slot];
1611	if ( entry & 0x80000000 )
1612	{
1613	_puts(" - PTI ");
1614	_putd( slot );
1615	_puts(" / isrtype = ");
1616	_putd( entry & 0xFFFF );
1617	_puts(" / channel = ");
1618	_putd( (entry >> 16) & 0x7FFF );
1619	_puts("\n");
1620	}
1621	}
1622	}
1623	}
1624	#endif
1625
1626	///////////////////////////////////////////////////////////////////
1627	// Step 2 : loop on the vspaces and the tasks to complete
1628	// the schedulers and task contexts initialisation.
1629
1630	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1631	{
1632	// We must set the PTPR depending on the vspace, because the start_vector
1633	// and the stack address are defined in virtual space.
1634	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id][0][0] >> 13) );
1635
1636	// loop on the tasks in vspace (task_id is the global index)
1637	for (task_id = vspace[vspace_id].task_offset;
1638	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
1639	task_id++)
1640	{
1641	// compute the cluster coordinates & local processor index
1642	unsigned int x = cluster[task[task_id].clusterid].x;
1643	unsigned int y = cluster[task[task_id].clusterid].y;
1644	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1645	unsigned int lpid = task[task_id].proclocid;
1646
1647	#if BOOT_DEBUG_SCHED
1648	_puts("\n[BOOT DEBUG] Initialise context for task ");
1649	_puts( task[task_id].name );
1650	_puts(" in vspace ");
1651	_puts( vspace[vspace_id].name );
1652	_puts("\n");
1653	#endif
1654	// compute gpid (global processor index) and scheduler base address
1655	unsigned int gpid = cluster_xy * NB_PROCS_MAX + lpid;
1656	psched = _schedulers[x][y][lpid];
1657
1658	// ctx_sr : value required before an eret instruction
1659	unsigned int ctx_sr = 0x0000FF13;
1660
1661	// ctx_ptpr : page table physical base address (shifted by 13 bit)
1662	unsigned int ctx_ptpr = (unsigned int)(_ptabs_paddr[vspace_id][x][y] >> 13);
1663
1664	// ctx_ptab : page_table virtual base address
1665	unsigned int ctx_ptab = _ptabs_vaddr[vspace_id];
1666
1667	// ctx_tty : TTY terminal global index provided by the global allocator
1668	// Each user terminal is a private ressource: the number of
1669	// requested terminal cannot be larger than NB_TTY_CHANNELS.
1670	unsigned int ctx_tty = 0xFFFFFFFF;
1671	if (task[task_id].use_tty)
1672	{
1673	if (alloc_tty_channel >= NB_TTY_CHANNELS)
1674	{
1675	_puts("\n[BOOT ERROR] TTY channel index too large for task ");
1676	_puts(task[task_id].name);
1677	_puts(" in vspace ");
1678	_puts(vspace[vspace_id].name);
1679	_puts("\n");
1680	_exit();
1681	}
1682	ctx_tty = alloc_tty_channel;
1683	alloc_tty_channel++;
1684	}
1685
1686	// ctx_nic : NIC channel global index provided by the global allocator
1687	// Each channel is a private ressource: the number of
1688	// requested channels cannot be larger than NB_NIC_CHANNELS.
1689	unsigned int ctx_nic = 0xFFFFFFFF;
1690	if (task[task_id].use_nic)
1691	{
1692	if (alloc_nic_channel >= NB_NIC_CHANNELS)
1693	{
1694	_puts("\n[BOOT ERROR] NIC channel index too large for task ");
1695	_puts(task[task_id].name);
1696	_puts(" in vspace ");
1697	_puts(vspace[vspace_id].name);
1698	_puts("\n");
1699	_exit();
1700	}
1701	ctx_nic = alloc_nic_channel;
1702	alloc_nic_channel++;
1703	}
1704
1705	// ctx_cma : CMA channel global index provided by the global allocator
1706	// Each channel is a private ressource: the number of
1707	// requested channels cannot be larger than NB_NIC_CHANNELS.
1708	unsigned int ctx_cma = 0xFFFFFFFF;
1709	if (task[task_id].use_cma)
1710	{
1711	if (alloc_cma_channel >= NB_CMA_CHANNELS)
1712	{
1713	_puts("\n[BOOT ERROR] CMA channel index too large for task ");
1714	_puts(task[task_id].name);
1715	_puts(" in vspace ");
1716	_puts(vspace[vspace_id].name);
1717	_puts("\n");
1718	_exit();
1719	}
1720	ctx_cma = alloc_cma_channel;
1721	alloc_cma_channel++;
1722	}
1723
1724	// ctx_hba : HBA channel global index provided by the global allocator
1725	// Each channel is a private ressource: the number of
1726	// requested channels cannot be larger than NB_NIC_CHANNELS.
1727	unsigned int ctx_hba = 0xFFFFFFFF;
1728	if (task[task_id].use_hba)
1729	{
1730	if (alloc_hba_channel >= NB_IOC_CHANNELS)
1731	{
1732	_puts("\n[BOOT ERROR] IOC channel index too large for task ");
1733	_puts(task[task_id].name);
1734	_puts(" in vspace ");
1735	_puts(vspace[vspace_id].name);
1736	_puts("\n");
1737	_exit();
1738	}
1739	ctx_hba = alloc_hba_channel;
1740	alloc_hba_channel++;
1741	}
1742	// ctx_tim : TIMER local channel index provided by the cluster allocator
1743	// Each timer is a private ressource
1744	unsigned int ctx_tim = 0xFFFFFFFF;
1745	if (task[task_id].use_tim)
1746	{
1747	unsigned int cluster_id = task[task_id].clusterid;
1748
1749	if ( alloc_tim_channel[cluster_id] >= NB_TIM_CHANNELS )
1750	{
1751	_puts("\n[BOOT ERROR] local TIMER index too large for task ");
1752	_puts(task[task_id].name);
1753	_puts(" in vspace ");
1754	_puts(vspace[vspace_id].name);
1755	_puts("\n");
1756	_exit();
1757	}
1758	ctx_tim = alloc_tim_channel[cluster_id];
1759	alloc_tim_channel[cluster_id]++;
1760	}
1761	// ctx_epc : Get the virtual address of the memory location containing
1762	// the task entry point : the start_vector is stored by GCC in the seg_data
1763	// segment and we must wait the .elf loading to get the entry point value...
1764	vobj_id = vspace[vspace_id].start_vobj_id;
1765	unsigned int ctx_epc = vobj[vobj_id].vaddr + (task[task_id].startid)*4;
1766
1767	// ctx_sp : Get the vobj containing the stack
1768	vobj_id = task[task_id].stack_vobj_id;
1769	unsigned int ctx_sp = vobj[vobj_id].vaddr + vobj[vobj_id].length;
1770
1771	// get local task index in scheduler
1772	unsigned int ltid = psched->tasks;
1773
1774	// get vspace thread index
1775	unsigned int thread_id = task[task_id].trdid;
1776
1777	if (ltid >= IDLE_TASK_INDEX)
1778	{
1779	_puts("\n[BOOT ERROR] in boot_schedulers_init() : ");
1780	_putd( ltid );
1781	_puts(" tasks allocated to processor ");
1782	_putd( gpid );
1783	_puts(" / max is ");
1784	_putd( IDLE_TASK_INDEX );
1785	_puts("\n");
1786	_exit();
1787	}
1788
1789	// update the "tasks" and "current" fields in scheduler:
1790	// the first task to execute is task 0 as soon as there is at least
1791	// one task allocated to processor.
1792	psched->tasks = ltid + 1;
1793	psched->current = 0;
1794
1795	// initializes the task context in scheduler
1796	psched->context[ltid][CTX_CR_ID] = 0;
1797	psched->context[ltid][CTX_SR_ID] = ctx_sr;
1798	psched->context[ltid][CTX_SP_ID] = ctx_sp;
1799	psched->context[ltid][CTX_EPC_ID] = ctx_epc;
1800	psched->context[ltid][CTX_PTPR_ID] = ctx_ptpr;
1801	psched->context[ltid][CTX_TTY_ID] = ctx_tty;
1802	psched->context[ltid][CTX_CMA_ID] = ctx_cma;
1803	psched->context[ltid][CTX_HBA_ID] = ctx_hba;
1804	psched->context[ltid][CTX_NIC_ID] = ctx_nic;
1805	psched->context[ltid][CTX_TIM_ID] = ctx_tim;
1806	psched->context[ltid][CTX_PTAB_ID] = ctx_ptab;
1807	psched->context[ltid][CTX_LTID_ID] = ltid;
1808	psched->context[ltid][CTX_GTID_ID] = task_id;
1809	psched->context[ltid][CTX_TRDID_ID] = thread_id;
1810	psched->context[ltid][CTX_VSID_ID] = vspace_id;
1811	psched->context[ltid][CTX_RUN_ID] = 1;
1812
1813	#if BOOT_DEBUG_SCHED
1814	_puts("\nTask ");
1815	_putd( task_id );
1816	_puts(" allocated to processor[");
1817	_putd( x );
1818	_puts(",");
1819	_putd( y );
1820	_puts(",");
1821	_putd( lpid );
1822	_puts("]\n - ctx[LTID] = ");
1823	_putd( psched->context[ltid][CTX_LTID_ID] );
1824	_puts("\n - ctx[SR] = ");
1825	_putx( psched->context[ltid][CTX_SR_ID] );
1826	_puts("\n - ctx[SP] = ");
1827	_putx( psched->context[ltid][CTX_SP_ID] );
1828	_puts("\n - ctx[EPC] = ");
1829	_putx( psched->context[ltid][CTX_EPC_ID] );
1830	_puts("\n - ctx[PTPR] = ");
1831	_putx( psched->context[ltid][CTX_PTPR_ID] );
1832	_puts("\n - ctx[TTY] = ");
1833	_putx( psched->context[ltid][CTX_TTY_ID] );
1834	_puts("\n - ctx[NIC] = ");
1835	_putx( psched->context[ltid][CTX_NIC_ID] );
1836	_puts("\n - ctx[CMA] = ");
1837	_putx( psched->context[ltid][CTX_CMA_ID] );
1838	_puts("\n - ctx[IOC] = ");
1839	_putx( psched->context[ltid][CTX_HBA_ID] );
1840	_puts("\n - ctx[TIM] = ");
1841	_putx( psched->context[ltid][CTX_TIM_ID] );
1842	_puts("\n - ctx[PTAB] = ");
1843	_putx( psched->context[ltid][CTX_PTAB_ID] );
1844	_puts("\n - ctx[GTID] = ");
1845	_putx( psched->context[ltid][CTX_GTID_ID] );
1846	_puts("\n - ctx[VSID] = ");
1847	_putx( psched->context[ltid][CTX_VSID_ID] );
1848	_puts("\n - ctx[TRDID] = ");
1849	_putx( psched->context[ltid][CTX_TRDID_ID] );
1850	_puts("\n");
1851	#endif
1852
1853	} // end loop on tasks
1854	} // end loop on vspaces
1855	} // end _schedulers_init()
1856
1857	//////////////////////////////////////////////////////////////////////////////////
1858	// This function loads the map.bin file from block device.
1859	// The fat global varible is defined in fat32.c file.
1860	//////////////////////////////////////////////////////////////////////////////////
1861	void boot_mapping_init()
1862	{
1863	// desactivates IOC interrupt
1864	_ioc_init( 0 );
1865
1866	// open file "map.bin"
1867	int fd_id = _fat_open( IOC_BOOT_MODE,
1868	"map.bin",
1869	0 ); // no creation
1870	if ( fd_id == -1 )
1871	{
1872	_puts("\n[BOOT ERROR] : map.bin file not found \n");
1873	_exit();
1874	}
1875
1876	#if BOOT_DEBUG_MAPPING
1877	_puts("\n[BOOT] map.bin file successfully open at cycle ");
1878	_putd(_get_proctime());
1879	_puts("\n");
1880	#endif
1881
1882	// get "map.bin" file size (from fat32) and check it
1883	unsigned int size = fat.fd[fd_id].file_size;
1884
1885	if ( size > SEG_BOOT_MAPPING_SIZE )
1886	{
1887	_puts("\n[BOOT ERROR] : allocated segment too small for map.bin file\n");
1888	_exit();
1889	}
1890
1891	// load "map.bin" file into buffer
1892	unsigned int nblocks = size >> 9;
1893	unsigned int offset = size & 0x1FF;
1894	if ( offset ) nblocks++;
1895
1896	unsigned int ok = _fat_read( IOC_BOOT_MODE,
1897	fd_id,
1898	(unsigned int*)SEG_BOOT_MAPPING_BASE,
1899	nblocks,
1900	0 ); // offset
1901	if ( ok == -1 )
1902	{
1903	_puts("\n[BOOT ERROR] : unable to load map.bin file \n");
1904	_exit();
1905	}
1906	_fat_close( fd_id );
1907
1908	// close file "map.bin"
1909	boot_mapping_check();
1910
1911	} // end boot_mapping_init()
1912
1913
1914	/////////////////////////////////////////////////////////////////////////////////////
1915	// This function load all loadable segments for one .elf file, identified
1916	// by the "pathname" argument. Some loadable segments can be copied in several
1917	// clusters: same virtual address but different physical addresses.
1918	// - It open the file.
1919	// - It loads the complete file in the dedicated boot_elf_buffer.
1920	// - It copies each loadable segments at the virtual address defined in
1921	// the .elf file, making several copies if the target vseg is not local.
1922	// - It closes the file.
1923	// This function is supposed to be executed by processor[0,0,0].
1924	// Note:
1925	// We must use physical addresses to reach the destination buffers that
1926	// can be located in remote clusters. We use either a _physical_memcpy(),
1927	// or a _dma_physical_copy() if DMA is available.
1928	//////////////////////////////////////////////////////////////////////////////////////
1929	void load_one_elf_file( unsigned int is_kernel, // kernel file if non zero
1930	char* pathname,
1931	unsigned int vspace_id ) // to scan the proper vspace
1932	{
1933	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1934	mapping_vspace_t * vspace = _get_vspace_base(header);
1935	mapping_vseg_t * vseg = _get_vseg_base(header);
1936	mapping_vobj_t * vobj = _get_vobj_base(header);
1937
1938	unsigned int seg_id;
1939
1940	#if BOOT_DEBUG_ELF
1941	_puts("\n[BOOT DEBUG] Start searching file ");
1942	_puts( pathname );
1943	_puts(" at cycle ");
1944	_putd( _get_proctime() );
1945	_puts("\n");
1946	#endif
1947
1948	// open .elf file
1949	int fd_id = _fat_open( IOC_BOOT_MODE,
1950	pathname,
1951	0 ); // no creation
1952	if ( fd_id < 0 )
1953	{
1954	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1955	_puts( pathname );
1956	_puts(" not found\n");
1957	_exit();
1958	}
1959
1960	// check buffer size versus file size
1961	if ( fat.fd[fd_id].file_size > GIET_ELF_BUFFER_SIZE )
1962	{
1963	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1964	_puts( pathname );
1965	_puts(" exceeds the GIET_ELF_BUFFERSIZE defined in giet_config.h\n");
1966	_exit();
1967	}
1968
1969	// compute number of sectors
1970	unsigned int nbytes = fat.fd[fd_id].file_size;
1971	unsigned int nsectors = nbytes>>9;
1972	if( nbytes & 0x1FF) nsectors++;
1973
1974	// load file in elf buffer
1975	if( _fat_read( IOC_BOOT_MODE,
1976	fd_id,
1977	boot_elf_buffer,
1978	nsectors,
1979	0 ) != nsectors )
1980	{
1981	_puts("\n[BOOT ERROR] load_one_elf_file() : unexpected EOF for file ");
1982	_puts( pathname );
1983	_puts("\n");
1984	_exit();
1985	}
1986
1987	// Check ELF Magic Number in ELF header
1988	Elf32_Ehdr* elf_header_ptr = (Elf32_Ehdr*)boot_elf_buffer;
1989
1990	if ( (elf_header_ptr->e_ident[EI_MAG0] != ELFMAG0) \|\|
1991	(elf_header_ptr->e_ident[EI_MAG1] != ELFMAG1) \|\|
1992	(elf_header_ptr->e_ident[EI_MAG2] != ELFMAG2) \|\|
1993	(elf_header_ptr->e_ident[EI_MAG3] != ELFMAG3) )
1994	{
1995	_puts("\n[BOOT ERROR] load_elf() : file ");
1996	_puts( pathname );
1997	_puts(" does not use ELF format\n");
1998	_exit();
1999	}
2000
2001	// get program header table pointer
2002	unsigned int pht_index = elf_header_ptr->e_phoff;
2003	if( pht_index == 0 )
2004	{
2005	_puts("\n[BOOT ERROR] load_one_elf_file() : file ");
2006	_puts( pathname );
2007	_puts(" does not contain loadable segment\n");
2008	_exit();
2009	}
2010	Elf32_Phdr* elf_pht_ptr = (Elf32_Phdr*)(boot_elf_buffer + pht_index);
2011
2012	// get number of segments
2013	unsigned int nsegments = elf_header_ptr->e_phnum;
2014
2015	_puts("\n[BOOT] File ");
2016	_puts( pathname );
2017	_puts(" loaded at cycle ");
2018	_putd( _get_proctime() );
2019	_puts("\n");
2020
2021	// Loop on loadable segments in the .elf file
2022	for (seg_id = 0 ; seg_id < nsegments ; seg_id++)
2023	{
2024	if(elf_pht_ptr[seg_id].p_type == PT_LOAD)
2025	{
2026	// Get segment attributes
2027	unsigned int seg_vaddr = elf_pht_ptr[seg_id].p_vaddr;
2028	unsigned int seg_offset = elf_pht_ptr[seg_id].p_offset;
2029	unsigned int seg_filesz = elf_pht_ptr[seg_id].p_filesz;
2030	unsigned int seg_memsz = elf_pht_ptr[seg_id].p_memsz;
2031
2032	#if BOOT_DEBUG_ELF
2033	_puts(" - segment ");
2034	_putd( seg_id );
2035	_puts(" / vaddr = ");
2036	_putx( seg_vaddr );
2037	_puts(" / file_size = ");
2038	_putx( seg_filesz );
2039	_puts("\n");
2040	#endif
2041
2042	if( seg_memsz < seg_filesz )
2043	{
2044	_puts("\n[BOOT ERROR] load_one_elf_file() : segment at vaddr = ");
2045	_putx( seg_vaddr );
2046	_puts(" in file ");
2047	_puts( pathname );
2048	_puts(" has memsz < filesz \n");
2049	_exit();
2050	}
2051
2052	// fill empty space with 0 as required
2053	if( seg_memsz > seg_filesz )
2054	{
2055	unsigned int i;
2056	for( i = seg_filesz ; i < seg_memsz ; i++ ) boot_elf_buffer[i+seg_offset] = 0;
2057	}
2058
2059	unsigned int src_vaddr = (unsigned int)boot_elf_buffer + seg_offset;
2060
2061	// search all vsegs matching the virtual address
2062	unsigned int vseg_first;
2063	unsigned int vseg_last;
2064	unsigned int vseg_id;
2065	unsigned int found = 0;
2066	if ( is_kernel )
2067	{
2068	vseg_first = 0;
2069	vseg_last = header->globals;
2070	}
2071	else
2072	{
2073	vseg_first = vspace[vspace_id].vseg_offset;
2074	vseg_last = vseg_first + vspace[vspace_id].vsegs;
2075	}
2076
2077	for ( vseg_id = vseg_first ; vseg_id < vseg_last ; vseg_id++ )
2078	{
2079	if ( seg_vaddr == vseg[vseg_id].vbase ) // matching
2080	{
2081	found = 1;
2082
2083	// get destination buffer physical address and size
2084	paddr_t seg_paddr = vseg[vseg_id].pbase;
2085	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
2086	unsigned int seg_size = vobj[vobj_id].length;
2087
2088	#if BOOT_DEBUG_ELF
2089	_puts(" loaded into vseg ");
2090	_puts( vseg[vseg_id].name );
2091	_puts(" at paddr = ");
2092	_putl( seg_paddr );
2093	_puts(" (buffer size = ");
2094	_putx( seg_size );
2095	_puts(")\n");
2096	#endif
2097	// check vseg size
2098	if ( seg_size < seg_filesz )
2099	{
2100	_puts("\n[BOOT ERROR] in load_one_elf_file()\n");
2101	_puts("vseg ");
2102	_puts( vseg[vseg_id].name );
2103	_puts(" is to small for loadable segment ");
2104	_putx( seg_vaddr );
2105	_puts(" in file ");
2106	_puts( pathname );
2107	_puts(" \n");
2108	_exit();
2109	}
2110
2111	// copy the segment from boot buffer to destination buffer
2112	// using DMA channel[0,0,0] if it is available.
2113	if( NB_DMA_CHANNELS > 0 )
2114	{
2115	_dma_physical_copy( 0, // DMA in cluster[0,0]
2116	0, // DMA channel 0
2117	(paddr_t)seg_paddr, // destination paddr
2118	(paddr_t)src_vaddr, // source paddr
2119	seg_filesz ); // size
2120	}
2121	else
2122	{
2123	_physical_memcpy( (paddr_t)seg_paddr, // destination paddr
2124	(paddr_t)src_vaddr, // source paddr
2125	seg_filesz ); // size
2126	}
2127	}
2128	} // end for vsegs in vspace
2129
2130	// check at least one matching vseg
2131	if ( found == 0 )
2132	{
2133	_puts("\n[BOOT ERROR] in load_one_elf_file()\n");
2134	_puts("vseg for loadable segment ");
2135	_putx( seg_vaddr );
2136	_puts(" in file ");
2137	_puts( pathname );
2138	_puts(" not found \n");
2139	_exit();
2140	}
2141	}
2142	} // end for loadable segments
2143
2144	// close .elf file
2145	_fat_close( fd_id );
2146
2147	} // end load_one_elf_file()
2148
2149
2150	/////i////////////////////////////////////////////////////////////////////////////////
2151	// This function uses the map.bin data structure to load the "kernel.elf" file
2152	// as well as the various "application.elf" files into memory.
2153	// - The "preloader.elf" file is not loaded, because it has been burned in the ROM.
2154	// - The "boot.elf" file is not loaded, because it has been loaded by the preloader.
2155	// This function scans all vobjs defined in the map.bin data structure to collect
2156	// all .elf files pathnames, and calls the load_one_elf_file() for each .elf file.
2157	// As the code can be replicated in several vsegs, the same code can be copied
2158	// in one or several clusters by the load_one_elf_file() function.
2159	//////////////////////////////////////////////////////////////////////////////////////
2160	void boot_elf_load()
2161	{
2162	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2163	mapping_vspace_t* vspace = _get_vspace_base( header );
2164	mapping_vobj_t* vobj = _get_vobj_base( header );
2165	unsigned int vspace_id;
2166	unsigned int vobj_id;
2167	unsigned int found;
2168
2169	// Scan all vobjs corresponding to global vsegs,
2170	// to find the pathname to the kernel.elf file
2171	found = 0;
2172	for( vobj_id = 0 ; vobj_id < header->globals ; vobj_id++ )
2173	{
2174	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
2175	{
2176	found = 1;
2177	break;
2178	}
2179	}
2180
2181	// We need one kernel.elf file
2182	if (found == 0)
2183	{
2184	_puts("[BOOT ERROR] boot_elf_load() : kernel.elf file not found\n");
2185	_exit();
2186	}
2187
2188	// Load the kernel
2189	load_one_elf_file( 1, // kernel file
2190	vobj[vobj_id].binpath, // file pathname
2191	0 ); // vspace 0
2192
2193	// loop on the vspaces, scanning all vobjs in the vspace,
2194	// to find the pathname of the .elf file associated to the vspace.
2195	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
2196	{
2197	// loop on the vobjs in vspace (vobj_id is the global index)
2198	unsigned int found = 0;
2199	for (vobj_id = vspace[vspace_id].vobj_offset;
2200	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
2201	vobj_id++)
2202	{
2203	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
2204	{
2205	found = 1;
2206	break;
2207	}
2208	}
2209
2210	// We want one .elf file per vspace
2211	if (found == 0)
2212	{
2213	_puts("[BOOT ERROR] boot_elf_load() : .elf file not found for vspace ");
2214	_puts( vspace[vspace_id].name );
2215	_puts("\n");
2216	_exit();
2217	}
2218
2219	load_one_elf_file( 0, // not a kernel file
2220	vobj[vobj_id].binpath, // file pathname
2221	vspace_id ); // vspace index
2222
2223	} // end for vspaces
2224
2225	} // end boot_elf_load()
2226
2227	////////////////////////////////////////////////////////////////////////////////
2228	// This function intializes the periherals and coprocessors, as specified
2229	// in the mapping_info file.
2230	////////////////////////////////////////////////////////////////////////////////
2231	void boot_peripherals_init()
2232	{
2233	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2234	mapping_cluster_t * cluster = _get_cluster_base(header);
2235	mapping_periph_t * periph = _get_periph_base(header);
2236	mapping_vobj_t * vobj = _get_vobj_base(header);
2237	mapping_coproc_t * coproc = _get_coproc_base(header);
2238	mapping_cp_port_t * cp_port = _get_cp_port_base(header);
2239	mapping_irq_t * irq = _get_irq_base(header);
2240
2241	unsigned int cluster_id;
2242	unsigned int periph_id;
2243	unsigned int coproc_id;
2244	unsigned int cp_port_id;
2245	unsigned int channel_id;
2246
2247	// loop on all physical clusters
2248	for (cluster_id = 0; cluster_id < X_SIZE*Y_SIZE; cluster_id++)
2249	{
2250	// computes cluster coordinates
2251	unsigned int x = cluster[cluster_id].x;
2252	unsigned int y = cluster[cluster_id].y;
2253	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
2254
2255	#if BOOT_DEBUG_PERI
2256	_puts("\n[BOOT DEBUG] Peripherals initialisation in cluster[");
2257	_putd( x );
2258	_puts(",");
2259	_putd( y );
2260	_puts("]\n");
2261	#endif
2262
2263	// loop on peripherals
2264	for (periph_id = cluster[cluster_id].periph_offset;
2265	periph_id < cluster[cluster_id].periph_offset +
2266	cluster[cluster_id].periphs; periph_id++)
2267	{
2268	unsigned int type = periph[periph_id].type;
2269	unsigned int subtype = periph[periph_id].subtype;
2270	unsigned int channels = periph[periph_id].channels;
2271
2272	switch (type)
2273	{
2274	case PERIPH_TYPE_IOC: // vci_block_device component
2275	{
2276	if ( subtype == PERIPH_SUBTYPE_BDV )
2277	{
2278	_bdv_lock.value = 0;
2279	#if BOOT_DEBUG_PERI
2280	_puts("- BDV : channels = ");
2281	_putd(channels);
2282	_puts("\n");
2283	#endif
2284	}
2285	else if ( subtype == PERIPH_SUBTYPE_HBA )
2286	{
2287	// TODO
2288	}
2289	else if ( subtype == PERIPH_SUBTYPE_SPI )
2290	{
2291	// TODO
2292	}
2293	break;
2294	}
2295	case PERIPH_TYPE_CMA: // vci_chbuf_dma component
2296	{
2297	for (channel_id = 0; channel_id < channels; channel_id++)
2298	{
2299	// TODO
2300	}
2301	#if BOOT_DEBUG_PERI
2302	_puts("- CMA : channels = ");
2303	_putd(channels);
2304	_puts("\n");
2305	#endif
2306	break;
2307	}
2308	case PERIPH_TYPE_NIC: // vci_multi_nic component
2309	{
2310	for (channel_id = 0; channel_id < channels; channel_id++)
2311	{
2312	// TODO
2313	}
2314	#if BOOT_DEBUG_PERI
2315	_puts("- NIC : channels = ");
2316	_putd(channels);
2317	_puts("\n");
2318	#endif
2319	break;
2320	}
2321	case PERIPH_TYPE_TTY: // vci_multi_tty component
2322	{
2323	for (channel_id = 0; channel_id < channels; channel_id++)
2324	{
2325	_tty_lock[channel_id].value = 0;
2326	_tty_rx_full[channel_id] = 0;
2327	}
2328	#if BOOT_DEBUG_PERI
2329	_puts("- TTY : channels = ");
2330	_putd(channels);
2331	_puts("\n");
2332	#endif
2333	break;
2334	}
2335	case PERIPH_TYPE_IOB: // vci_io_bridge component
2336	{
2337	if (GIET_USE_IOMMU)
2338	{
2339	// TODO
2340	// get the iommu page table physical address
2341	// set IOMMU page table address
2342	// pseg_base[IOB_IOMMU_PTPR] = ptab_pbase;
2343	// activate IOMMU
2344	// pseg_base[IOB_IOMMU_ACTIVE] = 1;
2345	}
2346	break;
2347	}
2348	case PERIPH_TYPE_PIC: // vci_iopic component
2349	{
2350	#if BOOT_DEBUG_PERI
2351	_puts("- PIC : channels = ");
2352	_putd(channels);
2353	_puts("\n");
2354	#endif
2355	// scan all IRQs defined in mapping for PIC component,
2356	// and initialises addresses for WTI IRQs
2357	for ( channel_id = periph[periph_id].irq_offset ;
2358	channel_id < periph[periph_id].irq_offset + periph[periph_id].irqs ;
2359	channel_id++ )
2360	{
2361	unsigned int hwi_id = irq[channel_id].srcid; // HWI index in PIC
2362	unsigned int wti_id = irq[channel_id].dest_id; // WTI index in XCU
2363	unsigned int cluster_xy = irq[channel_id].dest_xy; // XCU coordinates
2364	unsigned int vaddr;
2365
2366	_xcu_get_wti_address( wti_id, &vaddr );
2367
2368	_pic_init( hwi_id, vaddr, cluster_xy );
2369	#if BOOT_DEBUG_PERI
2370	_puts(" hwi_index = ");
2371	_putd( hwi_id );
2372	_puts(" / wti_index = ");
2373	_putd( wti_id );
2374	_puts(" / vaddr = ");
2375	_putx( vaddr );
2376	_puts(" in cluster[");
2377	_putd( cluster_xy >> Y_WIDTH );
2378	_puts(",");
2379	_putd( cluster_xy & ((1<<Y_WIDTH)-1) );
2380	_puts("]\n");
2381	#endif
2382	}
2383	break;
2384	}
2385	} // end switch periph type
2386	} // end for periphs
2387
2388	#if BOOT_DEBUG_PERI
2389	_puts("\n[BOOT DEBUG] Coprocessors initialisation in cluster[");
2390	_putd( x );
2391	_puts(",");
2392	_putd( y );
2393	_puts("]\n");
2394	#endif
2395
2396	// loop on coprocessors
2397	for ( coproc_id = cluster[cluster_id].coproc_offset;
2398	coproc_id < cluster[cluster_id].coproc_offset +
2399	cluster[cluster_id].coprocs; coproc_id++ )
2400	{
2401
2402	#if BOOT_DEBUG_PERI
2403	_puts("- coprocessor name : ");
2404	_puts(coproc[coproc_id].name);
2405	_puts(" / nb ports = ");
2406	_putd((unsigned int) coproc[coproc_id].ports);
2407	_puts("\n");
2408	#endif
2409	// loop on the coprocessor ports
2410	for ( cp_port_id = coproc[coproc_id].port_offset;
2411	cp_port_id < coproc[coproc_id].port_offset + coproc[coproc_id].ports;
2412	cp_port_id++ )
2413	{
2414	// Get global index of associted vobj
2415	unsigned int vobj_id = cp_port[cp_port_id].mwmr_vobj_id;
2416
2417	// Get MWMR channel base address
2418	paddr_t mwmr_channel_pbase = vobj[vobj_id].paddr;
2419
2420	_mwr_hw_init( cluster_xy,
2421	cp_port_id,
2422	cp_port[cp_port_id].direction,
2423	mwmr_channel_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( mwmr_channel_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 is the entry point of the boot code for all processors.
2440	// Most of this code is executed by Processor 0 only.
2441	/////////////////////////////////////////////////////////////////////////
2442	void boot_init()
2443	{
2444	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2445	mapping_cluster_t* cluster = _get_cluster_base(header);
2446	unsigned int gpid = _get_procid();
2447
2448	if ( gpid == 0 ) // only Processor 0 does it
2449	{
2450	_puts("\n[BOOT] boot_init start at cycle ");
2451	_putd(_get_proctime());
2452	_puts("\n");
2453
2454	// Load the map.bin file into memory and check it
2455	boot_mapping_init();
2456
2457	_puts("\n[BOOT] Mapping \"");
2458	_puts( header->name );
2459	_puts("\" loaded at cycle ");
2460	_putd(_get_proctime());
2461	_puts("\n");
2462
2463	// Build page tables
2464	boot_pt_init();
2465
2466	// Activate MMU for proc [0,0,0]
2467	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0][0][0]>>13) );
2468	_set_mmu_mode( 0xF );
2469
2470	_puts("\n[BOOT] Processor[0,0,0] : MMU activation at cycle ");
2471	_putd(_get_proctime());
2472	_puts("\n");
2473
2474	// Initialise private vobjs in vspaces
2475	boot_vobjs_init();
2476
2477	_puts("\n[BOOT] Private vobjs initialised at cycle ");
2478	_putd(_get_proctime());
2479	_puts("\n");
2480
2481	// Initialise schedulers
2482	boot_schedulers_init();
2483
2484	_puts("\n[BOOT] Schedulers initialised at cycle ");
2485	_putd(_get_proctime());
2486	_puts("\n");
2487
2488	// Set CP0_SCHED register for proc [0,0,0]
2489	_set_sched( (unsigned int)_schedulers[0][0][0] );
2490
2491	// Initialise non replicated peripherals
2492	boot_peripherals_init();
2493
2494	_puts("\n[BOOT] Non replicated peripherals initialised at cycle ");
2495	_putd(_get_proctime());
2496	_puts("\n");
2497
2498	// Loading all .elf files
2499	boot_elf_load();
2500
2501	// P0 starts all other processors
2502	unsigned int clusterid, p;
2503
2504	for ( clusterid = 0 ; clusterid < X_SIZE*Y_SIZE ; clusterid++ )
2505	{
2506	unsigned int nprocs = cluster[clusterid].procs;
2507	unsigned int x = cluster[clusterid].x;
2508	unsigned int y = cluster[clusterid].y;
2509	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
2510
2511	for ( p = 0 ; p < nprocs; p++ )
2512	{
2513	if ( (nprocs > 0) && ((clusterid != 0) \|\| (p != 0)) )
2514	{
2515	_xcu_send_wti( cluster_xy, p, (unsigned int)boot_entry );
2516	}
2517	}
2518	}
2519
2520	} // end monoprocessor boot
2521
2522	///////////////////////////////////////////////////////////////////////////////
2523	// Parallel execution starts actually here
2524	///////////////////////////////////////////////////////////////////////////////
2525
2526	// all processors reset BEV bit in the status register to use
2527	// the GIET_VM exception handler instead of the PRELOADER exception handler
2528	_set_sr( 0 );
2529
2530	// all processor initialise the SCHED register
2531	// from the _schedulers[x][y][lpid array]
2532	unsigned int cluster_xy = gpid / NB_PROCS_MAX;
2533	unsigned int lpid = gpid % NB_PROCS_MAX;
2534	unsigned int x = cluster_xy >> Y_WIDTH;
2535	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
2536	_set_sched( (unsigned int)_schedulers[x][y][lpid] );
2537
2538	// all processors (but Proc[0,0,0]) activate MMU
2539	if ( gpid != 0 )
2540	{
2541	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0][x][y]>>13) );
2542	_set_mmu_mode( 0xF );
2543	}
2544
2545	// all processors jump to kernel_init
2546	// using the address defined in the giet_vsegs.ld file
2547	unsigned int kernel_entry = (unsigned int)&kernel_init_vbase;
2548	asm volatile( "jr %0" ::"r"(kernel_entry) );
2549
2550	} // end boot_init()
2551
2552
2553	// Local Variables:
2554	// tab-width: 4
2555	// c-basic-offset: 4
2556	// c-file-offsets:((innamespace . 0)(inline-open . 0))
2557	// indent-tabs-mode: nil
2558	// End:
2559	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
2560

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