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source: soft/giet_vm/giet_boot/boot.c @ 457

Last change on this file since 457 was 452, checked in by alain, 10 years ago
Update the boot.c file to initialise the new slots in task context.
File size: 83.4 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 memory multi-processors architectures,
13	// where each processor is identified by a composite index (cluster_xy, local_id),
14	// and where there is one physical memory bank per cluster.
15	//
16	// This code, executed in the boot phase by proc[0,0,0], performs the following tasks:
17	// - load into memory various binary files, from a FAT32 file system,
18	// - build the various page tables (one page table per vspace)
19	// - initialize the shedulers (one scheduler per processor)
20	//
21	// 1) The binary files to be loaded are:
22	// - the "map.bin" file contains the hardware architecture description and the
23	// mapping directives. It must be stored in the the seg_boot_mapping segment
24	// (at address SEG_BOOT_MAPPING_BASE defined in hard_config.h file).
25	// - the "sys.elf" file contains the kernel binary code and data.
26	// - the various "application.elf" files.
27	//
28	// 2) The map.bin file contains the binary representation of the map.xml file defining:
29	// - the hardware architecture: number of clusters, number or processors,
30	// size of the memory segments, and peripherals in each cluster.
31	// - The structure of the various multi-threaded software applications:
32	// number of tasks, communication channels.
33	// - The mapping: grouping of virtual objects (vobj) in the virtual segments (vseg),
34	// placement of virtual segments (vseg) in the physical segments (pseg), placement
35	// of software tasks on the processors,
36	//
37	// 3) The GIET-VM uses the paged virtual memory to provides two services:
38	// - classical memory protection, when several independant applications compiled
39	// in different virtual spaces are executing on the same hardware platform.
40	// - data placement in NUMA architectures, to control the placement
41	// of the software objects (vsegs) on the physical memory banks (psegs).
42	//
43	// The max number of vspaces (GIET_NB_VSPACE_MAX) is a configuration parameter.
44	// The page table are statically build in the boot phase, and they do not
45	// change during execution.
46	// The GIET_VM uses both small pages (4 Kbytes), and big pages (2 Mbytes).
47	//
48	// Each page table (one page table per virtual space) is monolithic, and contains
49	// one PT1 (8 Kbytes) and a variable number of PT2s (4 Kbytes each). For each vspace,
50	// the numberof PT2s is defined by the size of the PTAB vobj in the mapping.
51	// The PT1 is indexed by the ix1 field (11 bits) of the VPN. Each entry is 32 bits.
52	// A PT2 is indexed the ix2 field (9 bits) of the VPN. Each entry is a double word.
53	// The first word contains the flags, the second word contains the PPN.
54	//
55	// The page tables can be distributed in all clusters.
56	///////////////////////////////////////////////////////////////////////////////////////
57	// Implementation Notes:
58	//
59	// 1) The cluster_id variable is a linear index in the mapping_info array of clusters.
60	// We use the cluster_xy variable for the tological index = x << Y_WIDTH + y
61	//
62	///////////////////////////////////////////////////////////////////////////////////////
63
64	#include <giet_config.h>
65	#include <mapping_info.h>
66	#include <mwmr_channel.h>
67	#include <barrier.h>
68	#include <memspace.h>
69	#include <tty_driver.h>
70	#include <xcu_driver.h>
71	#include <bdv_driver.h>
72	#include <dma_driver.h>
73	#include <cma_driver.h>
74	#include <nic_driver.h>
75	#include <ioc_driver.h>
76	#include <iob_driver.h>
77	#include <pic_driver.h>
78	#include <mwr_driver.h>
79	#include <ctx_handler.h>
80	#include <irq_handler.h>
81	#include <vmem.h>
82	#include <pmem.h>
83	#include <utils.h>
84	#include <elf-types.h>
85
86	// for boot FAT initialisation
87	#include <fat32.h>
88
89	#include <mips32_registers.h>
90	#include <stdarg.h>
91
92	#if !defined(X_SIZE)
93	# error: The X_SIZE value must be defined in the 'hard_config.h' file !
94	#endif
95
96	#if !defined(Y_SIZE)
97	# error: The Y_SIZE value must be defined in the 'hard_config.h' file !
98	#endif
99
100	#if !defined(X_WIDTH)
101	# error: The X_WIDTH value must be defined in the 'hard_config.h' file !
102	#endif
103
104	#if !defined(Y_WIDTH)
105	# error: The Y_WIDTH value must be defined in the 'hard_config.h' file !
106	#endif
107
108	#if !defined(SEG_BOOT_MAPPING_BASE)
109	# error: The SEG_BOOT_MAPPING_BASE 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	#if !defined(GIET_ELF_BUFFER_SIZE)
121	# error: The GIET_ELF_BUFFER_SIZE value must be defined in the giet_config.h file !
122	#endif
123
124	////////////////////////////////////////////////////////////////////////////
125	// Global variables for boot code
126	////////////////////////////////////////////////////////////////////////////
127
128	extern void boot_entry();
129
130	// FAT internal representation for boot code
131	__attribute__((section (".bootdata")))
132	fat32_fs_t fat __attribute__((aligned(512)));
133
134	// Temporaty buffer used to load one complete .elf file
135	__attribute__((section (".bootdata")))
136	char boot_elf_buffer[GIET_ELF_BUFFER_SIZE] __attribute__((aligned(512)));
137
138	// Physical memory allocators array (one per cluster)
139	__attribute__((section (".bootdata")))
140	pmem_alloc_t boot_pmem_alloc[X_SIZE][Y_SIZE];
141
142	// Schedulers virtual base addresses array (one per processor)
143	__attribute__((section (".bootdata")))
144	static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX];
145
146	// Page tables virtual base addresses array (one per vspace)
147	__attribute__((section (".bootdata")))
148	unsigned int _ptabs_vaddr[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
149
150	// Page tables physical base addresses (one per vspace and per cluster)
151	__attribute__((section (".bootdata")))
152	paddr_t _ptabs_paddr[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
153
154	// Page tables pt2 allocators (one per vspace and per cluster)
155	__attribute__((section (".bootdata")))
156	unsigned int _ptabs_next_pt2[GIET_NB_VSPACE_MAX][X_SIZE][Y_SIZE];
157
158	// Page tables max_pt2 (same value for all page tables)
159	__attribute__((section (".bootdata")))
160	unsigned int _ptabs_max_pt2;
161
162	/////////////////////////////////////////////////////////////////////
163	// This function checks consistence beween the mapping_info data
164	// structure (soft), and the giet_config file (hard).
165	/////////////////////////////////////////////////////////////////////
166	void boot_mapping_check()
167	{
168	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
169
170	// checking mapping availability
171	if (header->signature != IN_MAPPING_SIGNATURE)
172	{
173	_puts("\n[BOOT ERROR] Illegal mapping signature: ");
174	_putx(header->signature);
175	_puts("\n");
176	_exit();
177	}
178
179	// checking number of clusters
180	if ( (header->x_size != X_SIZE) \|\|
181	(header->y_size != Y_SIZE) \|\|
182	(header->x_width != X_WIDTH) \|\|
183	(header->y_width != Y_WIDTH) )
184	{
185	_puts("\n[BOOT ERROR] Incoherent X_SIZE or Y_SIZE ");
186	_puts("\n - In hard_config: X_SIZE = ");
187	_putd( X_SIZE );
188	_puts(" / Y_SIZE = ");
189	_putd( Y_SIZE );
190	_puts(" / X_WIDTH = ");
191	_putd( X_WIDTH );
192	_puts(" / Y_WIDTH = ");
193	_putd( Y_WIDTH );
194	_puts("\n - In mapping_info: x_size = ");
195	_putd( header->x_size );
196	_puts(" / y_size = ");
197	_putd( header->y_size );
198	_puts(" / x_width = ");
199	_putd( header->x_width );
200	_puts(" / y_width = ");
201	_putd( header->y_width );
202	_puts("\n");
203	_exit();
204	}
205	// checking number of virtual spaces
206	if (header->vspaces > GIET_NB_VSPACE_MAX)
207	{
208	_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n");
209	_puts("\n");
210	_exit();
211	}
212
213	#if BOOT_DEBUG_MAPPING
214	_puts("\n - x_size = ");
215	_putd( header->x_size );
216	_puts("\n - y_size = ");
217	_putd( header->y_size );
218	_puts("\n - procs = ");
219	_putd( header->procs );
220	_puts("\n - periphs = ");
221	_putd( header->periphs );
222	_puts("\n - vspaces = ");
223	_putd( header->vspaces );
224	_puts("\n - tasks = ");
225	_putd( header->tasks );
226	_puts("\n");
227	_puts("\n - size of header = ");
228	_putd( MAPPING_HEADER_SIZE );
229	_puts("\n - size of cluster = ");
230	_putd( MAPPING_CLUSTER_SIZE );
231	_puts("\n - size of pseg = ");
232	_putd( MAPPING_PSEG_SIZE );
233	_puts("\n - size of proc = ");
234	_putd( MAPPING_PROC_SIZE );
235	_puts("\n - size of vspace = ");
236	_putd( MAPPING_VSPACE_SIZE );
237	_puts("\n - size of vseg = ");
238	_putd( MAPPING_VSEG_SIZE );
239	_puts("\n - size of vobj = ");
240	_putd( MAPPING_VOBJ_SIZE );
241	_puts("\n - size of task = ");
242	_putd( MAPPING_TASK_SIZE );
243	_puts("\n");
244
245	unsigned int cluster_id;
246	mapping_cluster_t * cluster = _get_cluster_base(header);
247	for( cluster_id = 0; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
248	{
249	_puts("\n - cluster[");
250	_putd( cluster[cluster_id].x );
251	_puts(",");
252	_putd( cluster[cluster_id].y );
253	_puts("]\n procs = ");
254	_putd( cluster[cluster_id].procs );
255	_puts("\n psegs = ");
256	_putd( cluster[cluster_id].psegs );
257	_puts("\n periphs = ");
258	_putd( cluster[cluster_id].periphs );
259	_puts("\n");
260	}
261	#endif
262
263	} // end boot_mapping_check()
264
265	//////////////////////////////////////////////////////////////////////////////
266	// This function registers a new PTE1 in the page table defined
267	// by the vspace_id argument, and the (x,y) coordinates.
268	// It updates only the first level PT1.
269	//////////////////////////////////////////////////////////////////////////////
270	void boot_add_pte1( unsigned int vspace_id,
271	unsigned int x,
272	unsigned int y,
273	unsigned int vpn, // 20 bits right-justified
274	unsigned int flags, // 10 bits left-justified
275	unsigned int ppn ) // 28 bits right-justified
276	{
277
278	#if (BOOT_DEBUG_PT > 1)
279	_puts(" - PTE1 in PTAB[");
280	_putd( vspace_id );
281	_puts(",");
282	_putd( x );
283	_puts(",");
284	_putd( y );
285	_puts("] : vpn = ");
286	_putx( vpn );
287	#endif
288
289	// compute index in PT1
290	unsigned int ix1 = vpn >> 9; // 11 bits for ix1
291
292	// get page table physical base address
293	paddr_t pt1_pbase = _ptabs_paddr[vspace_id][x][y];
294
295	// check pt1_base
296	if ( pt1_pbase == 0 )
297	{
298	_puts("\n[BOOT ERROR] in boot_add_pte1() : illegal pbase address for PTAB[");
299	_putd( vspace_id );
300	_puts(",");
301	_putd( x );
302	_puts(",");
303	_putd( y );
304	_puts("]\n");
305	_exit();
306	}
307
308	// compute pte1 : 2 bits V T / 8 bits flags / 3 bits RSVD / 19 bits bppi
309	unsigned int pte1 = PTE_V \|
310	(flags & 0x3FC00000) \|
311	((ppn>>9) & 0x0007FFFF);
312
313	// write pte1 in PT1
314	_physical_write( pt1_pbase + 4*ix1, pte1 );
315
316	#if (BOOT_DEBUG_PT > 1)
317	_puts(" / ppn = ");
318	_putx( ppn );
319	_puts(" / flags = ");
320	_putx( flags );
321	_puts("\n");
322	#endif
323
324	} // end boot_add_pte1()
325
326	//////////////////////////////////////////////////////////////////////////////
327	// This function registers a new PTE2 in the page table defined
328	// by the vspace_id argument, and the (x,y) coordinates.
329	// It updates both the first level PT1 and the second level PT2.
330	// As the set of PT2s is implemented as a fixed size array (no dynamic
331	// allocation), this function checks a possible overflow of the PT2 array.
332	//////////////////////////////////////////////////////////////////////////////
333	void boot_add_pte2( unsigned int vspace_id,
334	unsigned int x,
335	unsigned int y,
336	unsigned int vpn, // 20 bits right-justified
337	unsigned int flags, // 10 bits left-justified
338	unsigned int ppn ) // 28 bits right-justified
339	{
340
341	#if (BOOT_DEBUG_PT > 1)
342	_puts(" - PTE2 in PTAB[");
343	_putd( vspace_id );
344	_puts(",");
345	_putd( x );
346	_puts(",");
347	_putd( y );
348	_puts("] : vpn = ");
349	_putx( vpn );
350	#endif
351
352	unsigned int ix1;
353	unsigned int ix2;
354	paddr_t pt2_pbase; // PT2 physical base address
355	paddr_t pte2_paddr; // PTE2 physical address
356	unsigned int pt2_id; // PT2 index
357	unsigned int ptd; // PTD : entry in PT1
358
359	ix1 = vpn >> 9; // 11 bits for ix1
360	ix2 = vpn & 0x1FF; // 9 bits for ix2
361
362	// get page table physical base address and size
363	paddr_t pt1_pbase = _ptabs_paddr[vspace_id][x][y];
364
365	// check pt1_base
366	if ( pt1_pbase == 0 )
367	{
368	_puts("\n[BOOT ERROR] in boot_add_pte2() : PTAB[");
369	_putd( vspace_id );
370	_puts(",");
371	_putd( x );
372	_puts(",");
373	_putd( y );
374	_puts("] undefined\n");
375	_exit();
376	}
377
378	// get ptd in PT1
379	ptd = _physical_read(pt1_pbase + 4 * ix1);
380
381	if ((ptd & PTE_V) == 0) // undefined PTD: compute PT2 base address,
382	// and set a new PTD in PT1
383	{
384	pt2_id = _ptabs_next_pt2[vspace_id][x][y];
385	if (pt2_id == _ptabs_max_pt2)
386	{
387	_puts("\n[BOOT ERROR] in boot_add_pte2() : PTAB[");
388	_putd( vspace_id );
389	_puts(",");
390	_putd( x );
391	_puts(",");
392	_putd( y );
393	_puts("] contains not enough PT2s\n");
394	_exit();
395	}
396
397	pt2_pbase = pt1_pbase + PT1_SIZE + PT2_SIZE * pt2_id;
398	ptd = PTE_V \| PTE_T \| (unsigned int) (pt2_pbase >> 12);
399	_physical_write( pt1_pbase + 4*ix1, ptd);
400	_ptabs_next_pt2[vspace_id][x][y] = pt2_id + 1;
401	}
402	else // valid PTD: compute PT2 base address
403	{
404	pt2_pbase = ((paddr_t)(ptd & 0x0FFFFFFF)) << 12;
405	}
406
407	// set PTE in PT2 : flags & PPN in two 32 bits words
408	pte2_paddr = pt2_pbase + 8 * ix2;
409	_physical_write(pte2_paddr , (PTE_V \|flags) );
410	_physical_write(pte2_paddr + 4 , ppn);
411
412	#if (BOOT_DEBUG_PT > 1)
413	_puts(" / ppn = ");
414	_putx( ppn );
415	_puts(" / flags = ");
416	_putx( flags );
417	_puts("\n");
418	#endif
419
420	} // end boot_add_pte2()
421
422	////////////////////////////////////////////////////////////////////////////////////
423	// Align the value of paddr or vaddr to the required alignement,
424	// defined by alignPow2 == L2(alignement).
425	////////////////////////////////////////////////////////////////////////////////////
426	paddr_t paddr_align_to(paddr_t paddr, unsigned int alignPow2)
427	{
428	paddr_t mask = (1 << alignPow2) - 1;
429	return ((paddr + mask) & ~mask);
430	}
431
432	unsigned int vaddr_align_to(unsigned int vaddr, unsigned int alignPow2)
433	{
434	unsigned int mask = (1 << alignPow2) - 1;
435	return ((vaddr + mask) & ~mask);
436	}
437
438	/////////////////////////////////////////////////////////////////////////////////////
439	// This function map a vseg identified by the vseg pointer.
440	//
441	// A given vseg can be mapped in Big Physical Pages (BPP: 2 Mbytes) or in a
442	// Small Physical Pages (SPP: 4 Kbytes), depending on the "big" attribute of vseg,
443	// with the following rules:
444	// - SPP : There is only one vseg in a small physical page, but a single vseg
445	// can cover several contiguous small physical pages.
446	// - BPP : It can exist several vsegs in a single big physical page, and a single
447	// vseg can cover several contiguous big physical pages.
448	//
449	// 1) First step: it computes the vseg length, and register it in vseg->length field.
450	// It computes - for each vobj - the actual vbase address, taking into
451	// account the alignment constraints and register it in vobj->vbase field.
452	//
453	// 2) Second step: it allocates the required number of physical pages,
454	// computes the physical base address (if the vseg is not identity mapping),
455	// and register it in the vseg pbase field.
456	// Only the 4 vsegs used by the boot code and the peripheral vsegs
457	// can be identity mapping: The first big physical page in cluster[0,0]
458	// is reserved for the 4 boot vsegs.
459	//
460	// 3) Third step (only for vseg that have the VOBJ_TYPE_PTAB): all page tables
461	// associated to the various vspaces must be packed in the same vseg.
462	// We divide the vseg in M sub-segments, and compute the vbase and pbase
463	// addresses for each page table, and register it in the _ptabs_paddr
464	// and _ptabs_vaddr arrays.
465	//
466	/////////////////////////////////////////////////////////////////////////////////////
467	void boot_vseg_map( mapping_vseg_t* vseg,
468	unsigned int vspace_id )
469	{
470	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
471	mapping_vobj_t* vobj = _get_vobj_base(header);
472	mapping_cluster_t* cluster = _get_cluster_base(header);
473	mapping_pseg_t* pseg = _get_pseg_base(header);
474
475	// compute destination cluster pointer & coordinates
476	pseg = pseg + vseg->psegid;
477	cluster = cluster + pseg->clusterid;
478	unsigned int x_dest = cluster->x;
479	unsigned int y_dest = cluster->y;
480
481	// compute the first vobj global index
482	unsigned int vobj_id = vseg->vobj_offset;
483
484	// compute the "big" vseg attribute
485	unsigned int big = vseg->big;
486
487	// compute the "is_ram" vseg attribute
488	unsigned int is_ram;
489	if ( pseg->type == PSEG_TYPE_RAM ) is_ram = 1;
490	else is_ram = 0;
491
492	// compute the "is_ptab" attribute
493	unsigned int is_ptab;
494	if ( vobj[vobj_id].type == VOBJ_TYPE_PTAB ) is_ptab = 1;
495	else is_ptab = 0;
496
497	// compute actual vspace index
498	unsigned int vsid;
499	if ( vspace_id == 0xFFFFFFFF ) vsid = 0;
500	else vsid = vspace_id;
501
502	//////////// First step : compute vseg length and vobj(s) vbase
503
504	unsigned int vobj_vbase = vseg->vbase; // min vbase for first vobj
505
506	for ( vobj_id = vseg->vobj_offset ;
507	vobj_id < (vseg->vobj_offset + vseg->vobjs) ;
508	vobj_id++ )
509	{
510	// compute and register vobj vbase
511	vobj[vobj_id].vbase = vaddr_align_to( vobj_vbase, vobj[vobj_id].align );
512
513	// compute min vbase for next vobj
514	vobj_vbase = vobj[vobj_id].vbase + vobj[vobj_id].length;
515	}
516
517	// compute and register vseg length (multiple of 4 Kbytes)
518	vseg->length = vaddr_align_to( vobj_vbase - vseg->vbase, 12 );
519
520	//////////// Second step : compute ppn and npages
521	//////////// - if identity mapping : ppn <= vpn
522	//////////// - if vseg is periph : ppn <= pseg.base >> 12
523	//////////// - if vseg is ram : ppn <= physical memory allocator
524
525	unsigned int ppn; // first physical page index ( 28 bits = \|x\|y\|bppi\|sppi\| )
526	unsigned int vpn; // first virtual page index ( 20 bits = \|ix1\|ix2\| )
527	unsigned int vpn_max; // last virtual page index ( 20 bits = \|ix1\|ix2\| )
528
529	vpn = vseg->vbase >> 12;
530	vpn_max = (vseg->vbase + vseg->length - 1) >> 12;
531
532	// compute npages
533	unsigned int npages; // number of required (big or small) pages
534	if ( big == 0 ) npages = vpn_max - vpn + 1; // number of small pages
535	else npages = (vpn_max>>9) - (vpn>>9) + 1; // number of big pages
536
537	// compute ppn
538	if ( vseg->ident ) // identity mapping
539	{
540	ppn = vpn;
541	}
542	else // not identity mapping
543	{
544	if ( is_ram ) // RAM : physical memory allocation required
545	{
546	// compute pointer on physical memory allocator in dest cluster
547	pmem_alloc_t* palloc = &boot_pmem_alloc[x_dest][y_dest];
548
549	if ( big == 0 ) // SPP : small physical pages
550	{
551	// allocate contiguous small physical pages
552	ppn = _get_small_ppn( palloc, npages );
553	}
554	else // BPP : big physical pages
555	{
556
557	// one big page can be shared by several vsegs
558	// we must chek if BPP already allocated
559	if ( is_ptab ) // It cannot be mapped
560	{
561	ppn = _get_big_ppn( palloc, npages );
562	}
563	else // It can be mapped
564	{
565	unsigned int ix1 = vpn >> 9; // 11 bits
566	paddr_t paddr = _ptabs_paddr[vsid][x_dest][y_dest] + (ix1<<2);
567	unsigned int pte1 = _physical_read( paddr );
568	if ( (pte1 & PTE_V) == 0 ) // BPP not allocated yet
569	{
570	// allocate contiguous big physical pages
571	ppn = _get_big_ppn( palloc, npages );
572	}
573	else // BPP already allocated
574	{
575	// test if new vseg has the same mode bits than
576	// the other vsegs in the same big page
577	unsigned int pte1_mode = 0;
578	if (pte1 & PTE_C) pte1_mode \|= C_MODE_MASK;
579	if (pte1 & PTE_X) pte1_mode \|= X_MODE_MASK;
580	if (pte1 & PTE_W) pte1_mode \|= W_MODE_MASK;
581	if (pte1 & PTE_U) pte1_mode \|= U_MODE_MASK;
582	if (vseg->mode != pte1_mode) {
583	_puts("\n[BOOT ERROR] in boot_vseg_map() : vseg ");
584	_puts( vseg->name );
585	_puts(" has different flags (");
586	_putx( vseg->mode );
587	_puts(") than other vsegs sharing the same big page (");
588	_putx( pte1_mode );
589	_puts(")");
590	_exit();
591	}
592
593	ppn = ((pte1 << 9) & 0x0FFFFE00);
594	}
595	}
596	ppn = ppn \| (vpn & 0x1FF);
597	}
598	}
599	else // PERI : no memory allocation required
600	{
601	ppn = pseg->base >> 12;
602	}
603	}
604
605	// update vseg.pbase field and update vsegs chaining
606	vseg->pbase = ((paddr_t)ppn) << 12;
607	vseg->next_vseg = pseg->next_vseg;
608	pseg->next_vseg = (unsigned int)vseg;
609
610
611	//////////// Third step : (only if the vseg is a page table)
612	//////////// - compute the physical & virtual base address for each vspace
613	//////////// by dividing the vseg in several sub-segments.
614	//////////// - register it in _ptabs_vaddr & _ptabs_paddr arrays,
615	//////////// and initialize next_pt2 allocators.
616	//////////// - reset all entries in first level page tables
617
618	if ( is_ptab )
619	{
620	unsigned int vs; // vspace index
621	unsigned int nspaces; // number of vspaces
622	unsigned int nsp; // number of small pages for one PTAB
623	unsigned int offset; // address offset for current PTAB
624
625	nspaces = header->vspaces;
626	offset = 0;
627
628	// each PTAB must be aligned on a 8 Kbytes boundary
629	nsp = ( vseg->length >> 12 ) / nspaces;
630	if ( (nsp & 0x1) == 0x1 ) nsp = nsp - 1;
631
632	// compute max_pt2
633	_ptabs_max_pt2 = ((nsp<<12) - PT1_SIZE) / PT2_SIZE;
634
635	for ( vs = 0 ; vs < nspaces ; vs++ )
636	{
637	_ptabs_vaddr [vs][x_dest][y_dest] = (vpn + offset) << 12;
638	_ptabs_paddr [vs][x_dest][y_dest] = ((paddr_t)(ppn + offset)) << 12;
639	_ptabs_next_pt2[vs][x_dest][y_dest] = 0;
640	offset += nsp;
641
642	// reset all entries in PT1 (8 Kbytes)
643	_physical_memset( _ptabs_paddr[vs][x_dest][y_dest], PT1_SIZE, 0 );
644	}
645	}
646
647	#if BOOT_DEBUG_PT
648	_puts("[BOOT DEBUG] ");
649	_puts( vseg->name );
650	_puts(" in cluster[");
651	_putd( x_dest );
652	_puts(",");
653	_putd( y_dest );
654	_puts("] : vbase = ");
655	_putx( vseg->vbase );
656	_puts(" / length = ");
657	_putx( vseg->length );
658	if ( big ) _puts(" / BIG / npages = ");
659	else _puts(" / SMALL / npages = ");
660	_putd( npages );
661	_puts(" / pbase = ");
662	_putl( vseg->pbase );
663	_puts("\n");
664	#endif
665
666	} // end boot_vseg_map()
667
668	/////////////////////////////////////////////////////////////////////////////////////
669	// For the vseg defined by the vseg pointer, this function register all PTEs
670	// in one or several page tables.
671	// It is a global vseg (kernel vseg) if (vspace_id == 0xFFFFFFFF).
672	// The number of involved PTABs depends on the "local" and "global" attributes:
673	// - PTEs are replicated in all vspaces for a global vseg.
674	// - PTEs are replicated in all clusters for a non local vseg.
675	/////////////////////////////////////////////////////////////////////////////////////
676	void boot_vseg_pte( mapping_vseg_t* vseg,
677	unsigned int vspace_id )
678	{
679	// compute the "global" vseg attribute and actual vspace index
680	unsigned int global;
681	unsigned int vsid;
682	if ( vspace_id == 0xFFFFFFFF )
683	{
684	global = 1;
685	vsid = 0;
686	}
687	else
688	{
689	global = 0;
690	vsid = vspace_id;
691	}
692
693	// compute the "local" and "big" attributes
694	unsigned int local = vseg->local;
695	unsigned int big = vseg->big;
696
697	// compute vseg flags
698	// The three flags (Local, Remote and Dirty) are set to 1 to reduce
699	// latency of TLB miss (L/R) and write (D): Avoid hardware update
700	// mechanism for these flags because GIET_VM does use these flags.
701	unsigned int flags = 0;
702	if (vseg->mode & C_MODE_MASK) flags \|= PTE_C;
703	if (vseg->mode & X_MODE_MASK) flags \|= PTE_X;
704	if (vseg->mode & W_MODE_MASK) flags \|= PTE_W;
705	if (vseg->mode & U_MODE_MASK) flags \|= PTE_U;
706	if ( global ) flags \|= PTE_G;
707	flags \|= PTE_L;
708	flags \|= PTE_R;
709	flags \|= PTE_D;
710
711	// compute VPN, PPN and number of pages (big or small)
712	unsigned int vpn = vseg->vbase >> 12;
713	unsigned int vpn_max = (vseg->vbase + vseg->length - 1) >> 12;
714	unsigned int ppn = (unsigned int)(vseg->pbase >> 12);
715	unsigned int npages;
716	if ( big == 0 ) npages = vpn_max - vpn + 1;
717	else npages = (vpn_max>>9) - (vpn>>9) + 1;
718
719	// compute destination cluster coordinates
720	unsigned int x_dest;
721	unsigned int y_dest;
722	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
723	mapping_cluster_t* cluster = _get_cluster_base(header);
724	mapping_pseg_t* pseg = _get_pseg_base(header);
725	pseg = pseg + vseg->psegid;
726	cluster = cluster + pseg->clusterid;
727	x_dest = cluster->x;
728	y_dest = cluster->y;
729
730	unsigned int p; // iterator for physical page index
731	unsigned int x; // iterator for cluster x coordinate
732	unsigned int y; // iterator for cluster y coordinate
733	unsigned int v; // iterator for vspace index
734
735	// loop on PTEs
736	for ( p = 0 ; p < npages ; p++ )
737	{
738	if ( (local != 0) && (global == 0) ) // one cluster / one vspace
739	{
740	if ( big ) // big pages => PTE1s
741	{
742	boot_add_pte1( vsid,
743	x_dest,
744	y_dest,
745	vpn + (p<<9),
746	flags,
747	ppn + (p<<9) );
748	}
749	else // small pages => PTE2s
750	{
751	boot_add_pte2( vsid,
752	x_dest,
753	y_dest,
754	vpn + p,
755	flags,
756	ppn + p );
757	}
758	}
759	else if ( (local == 0) && (global == 0) ) // all clusters / one vspace
760	{
761	for ( x = 0 ; x < X_SIZE ; x++ )
762	{
763	for ( y = 0 ; y < Y_SIZE ; y++ )
764	{
765	if ( big ) // big pages => PTE1s
766	{
767	boot_add_pte1( vsid,
768	x,
769	y,
770	vpn + (p<<9),
771	flags,
772	ppn + (p<<9) );
773	}
774	else // small pages => PTE2s
775	{
776	boot_add_pte2( vsid,
777	x,
778	y,
779	vpn + p,
780	flags,
781	ppn + p );
782	}
783	}
784	}
785	}
786	else if ( (local != 0) && (global != 0) ) // one cluster / all vspaces
787	{
788	for ( v = 0 ; v < header->vspaces ; v++ )
789	{
790	if ( big ) // big pages => PTE1s
791	{
792	boot_add_pte1( v,
793	x_dest,
794	y_dest,
795	vpn + (p<<9),
796	flags,
797	ppn + (p<<9) );
798	}
799	else // small pages = PTE2s
800	{
801	boot_add_pte2( v,
802	x_dest,
803	y_dest,
804	vpn + p,
805	flags,
806	ppn + p );
807	}
808	}
809	}
810	else if ( (local == 0) && (global != 0) ) // all clusters / all vspaces
811	{
812	for ( x = 0 ; x < X_SIZE ; x++ )
813	{
814	for ( y = 0 ; y < Y_SIZE ; y++ )
815	{
816	for ( v = 0 ; v < header->vspaces ; v++ )
817	{
818	if ( big ) // big pages => PTE1s
819	{
820	boot_add_pte1( v,
821	x,
822	y,
823	vpn + (p<<9),
824	flags,
825	ppn + (p<<9) );
826	}
827	else // small pages -> PTE2s
828	{
829	boot_add_pte2( v,
830	x,
831	y,
832	vpn + p,
833	flags,
834	ppn + p );
835	}
836	}
837	}
838	}
839	}
840	} // end for pages
841	} // end boot_vseg_pte()
842
843	///////////////////////////////////////////////////////////////////////////////
844	// This function initialises the page tables for all vspaces defined
845	// in the mapping_info data structure.
846	// For each vspace, there is one page table per cluster.
847	// In each cluster all page tables for the different vspaces must be
848	// packed in one vseg occupying one single BPP (Big Physical Page).
849	//
850	// For each vseg, the mapping is done in two steps:
851	// 1) mapping : the boot_vseg_map() function allocates contiguous BPPs
852	// or SPPs (if the vseg is not associated to a peripheral), and register
853	// the physical base address in the vseg pbase field. It initialises the
854	// _ptabs_vaddr and _ptabs_paddr arrays if the vseg is a PTAB.
855	//
856	// 2) page table initialisation : the boot_vseg_pte() function initialise
857	// the PTEs (both PTE1 and PTE2) in one or several page tables:
858	// - PTEs are replicated in all vspaces for a global vseg.
859	// - PTEs are replicated in all clusters for a non local vseg.
860	//
861	// We must handle vsegs in the following order
862	// 1) all global vsegs containing a page table,
863	// 2) all global vsegs occupying more than one BPP,
864	// 3) all others global vsegs
865	// 4) all private vsegs in user space.
866	///////////////////////////////////////////////////////////////////////////////
867	void boot_ptabs_init()
868	{
869	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
870	mapping_vspace_t* vspace = _get_vspace_base(header);
871	mapping_vseg_t* vseg = _get_vseg_base(header);
872	mapping_vobj_t* vobj = _get_vobj_base(header);
873
874	unsigned int vspace_id;
875	unsigned int vseg_id;
876
877	if (header->vspaces == 0 )
878	{
879	_puts("\n[BOOT ERROR] in boot_ptabs_init() : mapping ");
880	_puts( header->name );
881	_puts(" contains no vspace\n");
882	_exit();
883	}
884
885	///////// Phase 1 : global vsegs containing a PTAB (two loops required)
886
887	#if BOOT_DEBUG_PT
888	_puts("\n[BOOT DEBUG] map PTAB global vsegs\n");
889	#endif
890
891	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
892	{
893	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
894	if ( (vobj[vobj_id].type == VOBJ_TYPE_PTAB) )
895	{
896	boot_vseg_map( &vseg[vseg_id], 0xFFFFFFFF );
897	vseg[vseg_id].mapped = 1;
898	}
899	}
900
901	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
902	{
903	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
904	if ( (vobj[vobj_id].type == VOBJ_TYPE_PTAB) )
905	{
906	boot_vseg_pte( &vseg[vseg_id], 0xFFFFFFFF );
907	vseg[vseg_id].mapped = 1;
908	}
909	}
910
911	///////// Phase 2 : global vsegs occupying more than one BPP (one loop)
912
913	#if BOOT_DEBUG_PT
914	_puts("\n[BOOT DEBUG] map all multi-BPP global vsegs\n");
915	#endif
916
917	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
918	{
919	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
920	if ( (vobj[vobj_id].length > 0x200000) &&
921	(vseg[vseg_id].mapped == 0) )
922	{
923	boot_vseg_map( &vseg[vseg_id], 0xFFFFFFFF );
924	vseg[vseg_id].mapped = 1;
925	boot_vseg_pte( &vseg[vseg_id], 0xFFFFFFFF );
926	}
927	}
928
929	///////// Phase 3 : all others global vsegs (one loop)
930
931	#if BOOT_DEBUG_PT
932	_puts("\n[BOOT DEBUG] map all others global vsegs\n");
933	#endif
934
935	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
936	{
937	if ( vseg[vseg_id].mapped == 0 )
938	{
939	boot_vseg_map( &vseg[vseg_id], 0xFFFFFFFF );
940	vseg[vseg_id].mapped = 1;
941	boot_vseg_pte( &vseg[vseg_id], 0xFFFFFFFF );
942	}
943	}
944
945	///////// Phase 4 : all private vsegs (two nested loops)
946
947	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
948	{
949
950	#if BOOT_DEBUG_PT
951	_puts("\n[BOOT DEBUG] map private vsegs for vspace ");
952	_puts( vspace[vspace_id].name );
953	_puts("\n");
954	#endif
955
956	for (vseg_id = vspace[vspace_id].vseg_offset;
957	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
958	vseg_id++)
959	{
960	boot_vseg_map( &vseg[vseg_id], vspace_id );
961	vseg[vseg_id].mapped = 1;
962	boot_vseg_pte( &vseg[vseg_id], vspace_id );
963	}
964	}
965
966	#if (BOOT_DEBUG_PT > 1)
967	mapping_vseg_t* curr;
968	mapping_pseg_t* pseg = _get_pseg_base(header);
969	mapping_cluster_t* cluster = _get_cluster_base(header);
970	unsigned int pseg_id;
971	for( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ )
972	{
973	unsigned int cluster_id = pseg[pseg_id].clusterid;
974	_puts("\n[BOOT DEBUG] vsegs mapped on pseg ");
975	_puts( pseg[pseg_id].name );
976	_puts(" in cluster[");
977	_putd( cluster[cluster_id].x );
978	_puts(",");
979	_putd( cluster[cluster_id].y );
980	_puts("]\n");
981	for( curr = (mapping_vseg_t*)pseg[pseg_id].next_vseg ;
982	curr != 0 ;
983	curr = (mapping_vseg_t*)curr->next_vseg )
984	{
985	_puts(" - vseg ");
986	_puts( curr->name );
987	_puts(" : len = ");
988	_putx( curr->length );
989	_puts(" / vbase ");
990	_putx( curr->vbase );
991	_puts(" / pbase ");
992	_putl( curr->pbase );
993	_puts("\n");
994	}
995	}
996	#endif
997
998	} // end boot_ptabs_init()
999
1000	///////////////////////////////////////////////////////////////////////////////
1001	// This function initializes the private vobjs that have the CONST type.
1002	// The MMU is supposed to be activated...
1003	///////////////////////////////////////////////////////////////////////////////
1004	void boot_vobjs_init()
1005	{
1006	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1007	mapping_vspace_t* vspace = _get_vspace_base(header);
1008	mapping_vobj_t* vobj = _get_vobj_base(header);
1009
1010	unsigned int vspace_id;
1011	unsigned int vobj_id;
1012
1013	// loop on the vspaces
1014	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1015	{
1016
1017	#if BOOT_DEBUG_VOBJS
1018	_puts("\n[BOOT DEBUG] ****** vobjs initialisation in vspace ");
1019	_puts(vspace[vspace_id].name);
1020	_puts(" ******\n");
1021	#endif
1022
1023	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id][0][0] >> 13) );
1024
1025	// loop on the vobjs
1026	for (vobj_id = vspace[vspace_id].vobj_offset;
1027	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1028	vobj_id++)
1029	{
1030	if ( (vobj[vobj_id].type) == VOBJ_TYPE_CONST )
1031	{
1032	#if BOOT_DEBUG_VOBJS
1033	_puts("CONST : ");
1034	_puts(vobj[vobj_id].name);
1035	_puts(" / vaddr = ");
1036	_putx(vobj[vobj_id].vaddr);
1037	_puts(" / paddr = ");
1038	_putl(vobj[vobj_id].paddr);
1039	_puts(" / value = ");
1040	_putx(vobj[vobj_id].init);
1041	_puts("\n");
1042	#endif
1043	unsigned int* addr = (unsigned int *) vobj[vobj_id].vbase;
1044	*addr = vobj[vobj_id].init;
1045	}
1046	}
1047	}
1048	} // end boot_vobjs_init()
1049
1050	///////////////////////////////////////////////////////////////////////////////
1051	// This function returns in the vbase and length buffers the virtual base
1052	// address and the length of the segment allocated to the schedulers array
1053	// in the cluster defined by the clusterid argument.
1054	///////////////////////////////////////////////////////////////////////////////
1055	void boot_get_sched_vaddr( unsigned int cluster_id,
1056	unsigned int* vbase,
1057	unsigned int* length )
1058	{
1059	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1060	mapping_vobj_t* vobj = _get_vobj_base(header);
1061	mapping_vseg_t* vseg = _get_vseg_base(header);
1062	mapping_pseg_t* pseg = _get_pseg_base(header);
1063
1064	unsigned int vseg_id;
1065	unsigned int found = 0;
1066
1067	for ( vseg_id = 0 ; (vseg_id < header->vsegs) && (found == 0) ; vseg_id++ )
1068	{
1069	if ( (vobj[vseg[vseg_id].vobj_offset].type == VOBJ_TYPE_SCHED) &&
1070	(pseg[vseg[vseg_id].psegid].clusterid == cluster_id ) )
1071	{
1072	*vbase = vseg[vseg_id].vbase;
1073	*length = vobj[vseg[vseg_id].vobj_offset].length;
1074	found = 1;
1075	}
1076	}
1077	if ( found == 0 )
1078	{
1079	mapping_cluster_t* cluster = _get_cluster_base(header);
1080	_puts("\n[BOOT ERROR] No vobj of type SCHED in cluster [");
1081	_putd( cluster[cluster_id].x );
1082	_puts(",");
1083	_putd( cluster[cluster_id].y );
1084	_puts("]\n");
1085	_exit();
1086	}
1087	} // end boot_get_sched_vaddr()
1088
1089	////////////////////////////////////////////////////////////////////////////////////
1090	// This function initialises all processors schedulers.
1091	// This is done by processor 0, and the MMU must be activated.
1092	// - In Step 1, it initialises the _schedulers[x][y][l] pointers array, and scan
1093	// the processors for a first initialisation of the schedulers:
1094	// idle_task context, and HWI / SWI / PTI vectors.
1095	// - In Step 2, it scan all tasks in all vspaces to complete the tasks contexts,
1096	// initialisation as specified in the mapping_info data structure.
1097	////////////////////////////////////////////////////////////////////////////////////
1098	void boot_schedulers_init()
1099	{
1100	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1101	mapping_cluster_t* cluster = _get_cluster_base(header);
1102	mapping_vspace_t* vspace = _get_vspace_base(header);
1103	mapping_task_t* task = _get_task_base(header);
1104	mapping_vobj_t* vobj = _get_vobj_base(header);
1105	mapping_periph_t* periph = _get_periph_base(header);
1106	mapping_irq_t* irq = _get_irq_base(header);
1107
1108	unsigned int cluster_id; // cluster index in mapping_info
1109	unsigned int periph_id; // peripheral index in mapping_info
1110	unsigned int irq_id; // irq index in mapping_info
1111	unsigned int vspace_id; // vspace index in mapping_info
1112	unsigned int task_id; // task index in mapping_info
1113	unsigned int vobj_id; // vobj index in mapping_info
1114
1115	unsigned int lpid; // local processor index (for several loops)
1116
1117	// WTI allocators to processors (for HWIs translated to WTIs)
1118	// In all clusters the first NB_PROCS_MAX WTIs are reserved for WAKUP
1119	unsigned int alloc_wti_channel[X_SIZE*Y_SIZE]; // one per cluster
1120
1121	// pointers on the XCU and PIC peripherals
1122	mapping_periph_t* xcu = NULL;
1123	mapping_periph_t* pic = NULL;
1124
1125	unsigned int sched_vbase; // schedulers array vbase address in a cluster
1126	unsigned int sched_length; // schedulers array length
1127	static_scheduler_t* psched; // pointer on processor scheduler
1128
1129	/////////////////////////////////////////////////////////////////////////
1130	// Step 1 : loop on the clusters and on the processors
1131	// to initialize the schedulers[] array of pointers,
1132	// idle task context and interrupt vectors.
1133	// Implementation note:
1134	// We need to use both (proc_id) to scan the mapping info structure,
1135	// and (x,y,lpid) to access the schedulers array.
1136
1137	for (cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
1138	{
1139	unsigned int x = cluster[cluster_id].x;
1140	unsigned int y = cluster[cluster_id].y;
1141
1142	#if BOOT_DEBUG_SCHED
1143	_puts("\n[BOOT DEBUG] Initialise schedulers in cluster[");
1144	_putd( x );
1145	_puts(",");
1146	_putd( y );
1147	_puts("]\n");
1148	#endif
1149	alloc_wti_channel[cluster_id] = NB_PROCS_MAX;
1150
1151	// checking processors number
1152	if ( cluster[cluster_id].procs > NB_PROCS_MAX )
1153	{
1154	_puts("\n[BOOT ERROR] Too much processors in cluster[");
1155	_putd( x );
1156	_puts(",");
1157	_putd( y );
1158	_puts("]\n");
1159	_exit();
1160	}
1161
1162	// no schedulers initialisation if nprocs == 0
1163	if ( cluster[cluster_id].procs > 0 )
1164	{
1165	// get scheduler array virtual base address in cluster[cluster_id]
1166	boot_get_sched_vaddr( cluster_id, &sched_vbase, &sched_length );
1167
1168	if ( sched_length < (cluster[cluster_id].procs<<13) ) // 8 Kbytes per scheduler
1169	{
1170	_puts("\n[BOOT ERROR] Schedulers segment too small in cluster[");
1171	_putd( x );
1172	_puts(",");
1173	_putd( y );
1174	_puts("]\n");
1175	_exit();
1176	}
1177
1178	// scan peripherals to find the XCU and the PIC component
1179
1180	xcu = NULL;
1181	for ( periph_id = cluster[cluster_id].periph_offset ;
1182	periph_id < cluster[cluster_id].periph_offset + cluster[cluster_id].periphs;
1183	periph_id++ )
1184	{
1185	if( periph[periph_id].type == PERIPH_TYPE_XCU )
1186	{
1187	xcu = &periph[periph_id];
1188
1189	if ( xcu->arg < cluster[cluster_id].procs )
1190	{
1191	_puts("\n[BOOT ERROR] Not enough inputs for XCU[");
1192	_putd( x );
1193	_puts(",");
1194	_putd( y );
1195	_puts("]\n");
1196	_exit();
1197	}
1198	}
1199	if( periph[periph_id].type == PERIPH_TYPE_PIC )
1200	{
1201	pic = &periph[periph_id];
1202	}
1203	}
1204	if ( xcu == NULL )
1205	{
1206	_puts("\n[BOOT ERROR] No XCU component in cluster[");
1207	_putd( x );
1208	_puts(",");
1209	_putd( y );
1210	_puts("]\n");
1211	_exit();
1212	}
1213
1214	// loop on processors for schedulers default values
1215	// initialisation, including WTI and PTI vectors
1216	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1217	{
1218	// pointer on processor scheduler
1219	psched = (static_scheduler_t*)(sched_vbase + (lpid<<13));
1220
1221	// initialise the schedulers pointers array
1222	_schedulers[x][y][lpid] = psched;
1223
1224	#if BOOT_DEBUG_SCHED
1225	unsigned int sched_vbase = (unsigned int)_schedulers[x][y][lpid];
1226	unsigned int sched_ppn;
1227	unsigned int sched_flags;
1228	paddr_t sched_pbase;
1229
1230	page_table_t* ptab = (page_table_t*)(_ptabs_vaddr[0][x][y]);
1231	_v2p_translate( ptab, sched_vbase>>12, &sched_ppn, &sched_flags );
1232	sched_pbase = ((paddr_t)sched_ppn)<<12;
1233
1234	_puts("\nProc[");
1235	_putd( x );
1236	_puts(",");
1237	_putd( y );
1238	_puts(",");
1239	_putd( lpid );
1240	_puts("] : scheduler vbase = ");
1241	_putx( sched_vbase );
1242	_puts(" : scheduler pbase = ");
1243	_putl( sched_pbase );
1244	_puts("\n");
1245	#endif
1246	// initialise the "tasks" and "current" variables default values
1247	psched->tasks = 0;
1248	psched->current = IDLE_TASK_INDEX;
1249
1250	// default values for HWI / PTI / SWI vectors (valid bit = 0)
1251	unsigned int slot;
1252	for (slot = 0; slot < 32; slot++)
1253	{
1254	psched->hwi_vector[slot] = 0;
1255	psched->pti_vector[slot] = 0;
1256	psched->wti_vector[slot] = 0;
1257	}
1258
1259	// WTI[lpid] <= ISR_WAKUP / PTI[lpid] <= ISR_TICK
1260	psched->wti_vector[lpid] = ISR_WAKUP \| 0x80000000;
1261	psched->pti_vector[lpid] = ISR_TICK \| 0x80000000;
1262
1263	// initializes the idle_task context in scheduler:
1264	// - the SR slot is 0xFF03 because this task run in kernel mode.
1265	// - it uses the page table of vspace[0]
1266	// - it uses the kernel TTY terminal
1267	// - slots containing addresses (SP, RA, EPC)
1268	// must be initialised by kernel_init()
1269
1270	psched->context[IDLE_TASK_INDEX][CTX_CR_ID] = 0;
1271	psched->context[IDLE_TASK_INDEX][CTX_SR_ID] = 0xFF03;
1272	psched->context[IDLE_TASK_INDEX][CTX_PTPR_ID] = _ptabs_paddr[0][x][y]>>13;
1273	psched->context[IDLE_TASK_INDEX][CTX_PTAB_ID] = _ptabs_vaddr[0][x][y];
1274	psched->context[IDLE_TASK_INDEX][CTX_TTY_ID] = 0;
1275	psched->context[IDLE_TASK_INDEX][CTX_LTID_ID] = IDLE_TASK_INDEX;
1276	psched->context[IDLE_TASK_INDEX][CTX_VSID_ID] = 0;
1277	psched->context[IDLE_TASK_INDEX][CTX_RUN_ID] = 1;
1278
1279	} // end for processors
1280
1281	// scan HWIs connected to local XCU
1282	// for round-robin allocation to processors
1283	lpid = 0;
1284	for ( irq_id = xcu->irq_offset ;
1285	irq_id < xcu->irq_offset + xcu->irqs ;
1286	irq_id++ )
1287	{
1288	unsigned int type = irq[irq_id].srctype;
1289	unsigned int srcid = irq[irq_id].srcid;
1290	unsigned int isr = irq[irq_id].isr & 0xFFFF;
1291	unsigned int channel = irq[irq_id].channel << 16;
1292
1293	if ( (type != IRQ_TYPE_HWI) \|\| (srcid > 31) )
1294	{
1295	_puts("\n[BOOT ERROR] Bad IRQ in XCU of cluster[");
1296	_putd( x );
1297	_puts(",");
1298	_putd( y );
1299	_puts("]\n");
1300	_exit();
1301	}
1302
1303	_schedulers[x][y][lpid]->hwi_vector[srcid] = isr \| channel \| 0x80000000;
1304	lpid = (lpid + 1) % cluster[cluster_id].procs;
1305
1306	} // end for irqs
1307	} // end if nprocs > 0
1308	} // end for clusters
1309
1310	// If there is an external PIC component, we scan HWIs connected to PIC
1311	// for Round Robin allocation (as WTI) to processors.
1312	// We allocate one WTI per processor, starting from proc[0,0,0],
1313	// and we increment (cluster_id, lpid) as required.
1314	if ( pic != NULL )
1315	{
1316	unsigned int cluster_id = 0; // index in clusters array
1317	unsigned int lpid = 0; // processor local index
1318
1319	// scan IRQS defined in PIC
1320	for ( irq_id = pic->irq_offset ;
1321	irq_id < pic->irq_offset + pic->irqs ;
1322	irq_id++ )
1323	{
1324	// compute next values for (cluster_id,lpid)
1325	// if no more procesor available in current cluster
1326	unsigned int overflow = 0;
1327	while ( (lpid >= cluster[cluster_id].procs) \|\|
1328	(alloc_wti_channel[cluster_id] >= xcu->arg) )
1329	{
1330	overflow++;
1331	cluster_id = (cluster_id + 1) % (X_SIZE*Y_SIZE);
1332	lpid = 0;
1333
1334	// overflow detection
1335	if ( overflow > (X_SIZEY_SIZENB_PROCS_MAX*32) )
1336	{
1337	_puts("\n[BOOT ERROR] Not enough processors for external IRQs\n");
1338	_exit();
1339	}
1340	}
1341
1342	unsigned int type = irq[irq_id].srctype;
1343	unsigned int srcid = irq[irq_id].srcid;
1344	unsigned int isr = irq[irq_id].isr & 0xFFFF;
1345	unsigned int channel = irq[irq_id].channel << 16;
1346
1347	if ( (type != IRQ_TYPE_HWI) \|\| (srcid > 31) )
1348	{
1349	_puts("\n[BOOT ERROR] Bad IRQ in PIC component\n");
1350	_exit();
1351	}
1352
1353	// get scheduler[cluster_id] address
1354	unsigned int x = cluster[cluster_id].x;
1355	unsigned int y = cluster[cluster_id].y;
1356	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1357	psched = _schedulers[x][y][lpid];
1358
1359	// update WTI vector for scheduler[cluster_id][lpid]
1360	unsigned int index = alloc_wti_channel[cluster_id];
1361	psched->wti_vector[index] = isr \| channel \| 0x80000000;
1362	alloc_wti_channel[cluster_id] = index + 1;
1363	lpid = lpid + 1;
1364
1365	// update IRQ fields in mapping for PIC initialisation
1366	irq[irq_id].dest_id = index;
1367	irq[irq_id].dest_xy = cluster_xy;
1368
1369	} // end for IRQs
1370	} // end if PIC
1371
1372	#if BOOT_DEBUG_SCHED
1373	for ( cluster_id = 0 ; cluster_id < (X_SIZE*Y_SIZE) ; cluster_id++ )
1374	{
1375	unsigned int x = cluster[cluster_id].x;
1376	unsigned int y = cluster[cluster_id].y;
1377	unsigned int slot;
1378	unsigned int entry;
1379	for ( lpid = 0 ; lpid < cluster[cluster_id].procs ; lpid++ )
1380	{
1381	psched = _schedulers[x][y][lpid];
1382
1383	_puts("\n*** IRQS for proc[");
1384	_putd( x );
1385	_puts(",");
1386	_putd( y );
1387	_puts(",");
1388	_putd( lpid );
1389	_puts("]\n");
1390	for ( slot = 0 ; slot < 32 ; slot++ )
1391	{
1392	entry = psched->hwi_vector[slot];
1393	if ( entry & 0x80000000 )
1394	{
1395	_puts(" - HWI ");
1396	_putd( slot );
1397	_puts(" / isrtype = ");
1398	_putd( entry & 0xFFFF );
1399	_puts(" / channel = ");
1400	_putd( (entry >> 16) & 0x7FFF );
1401	_puts("\n");
1402	}
1403	}
1404	for ( slot = 0 ; slot < 32 ; slot++ )
1405	{
1406	entry = psched->wti_vector[slot];
1407	if ( entry & 0x80000000 )
1408	{
1409	_puts(" - WTI ");
1410	_putd( slot );
1411	_puts(" / isrtype = ");
1412	_putd( entry & 0xFFFF );
1413	_puts(" / channel = ");
1414	_putd( (entry >> 16) & 0x7FFF );
1415	_puts("\n");
1416	}
1417	}
1418	for ( slot = 0 ; slot < 32 ; slot++ )
1419	{
1420	entry = psched->pti_vector[slot];
1421	if ( entry & 0x80000000 )
1422	{
1423	_puts(" - PTI ");
1424	_putd( slot );
1425	_puts(" / isrtype = ");
1426	_putd( entry & 0xFFFF );
1427	_puts(" / channel = ");
1428	_putd( (entry >> 16) & 0x7FFF );
1429	_puts("\n");
1430	}
1431	}
1432	}
1433	}
1434	#endif
1435
1436	///////////////////////////////////////////////////////////////////
1437	// Step 2 : loop on the vspaces and the tasks to complete
1438	// the schedulers and task contexts initialisation.
1439
1440	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1441	{
1442	// We must set the PTPR depending on the vspace, because the start_vector
1443	// and the stack address are defined in virtual space.
1444	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id][0][0] >> 13) );
1445
1446	// loop on the tasks in vspace (task_id is the global index in mapping)
1447	for (task_id = vspace[vspace_id].task_offset;
1448	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
1449	task_id++)
1450	{
1451	// compute the cluster coordinates & local processor index
1452	unsigned int x = cluster[task[task_id].clusterid].x;
1453	unsigned int y = cluster[task[task_id].clusterid].y;
1454	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1455	unsigned int lpid = task[task_id].proclocid;
1456
1457	#if BOOT_DEBUG_SCHED
1458	_puts("\n[BOOT DEBUG] Initialise context for task ");
1459	_puts( task[task_id].name );
1460	_puts(" in vspace ");
1461	_puts( vspace[vspace_id].name );
1462	_puts("\n");
1463	#endif
1464	// compute gpid (global processor index) and scheduler base address
1465	unsigned int gpid = (cluster_xy << P_WIDTH) + lpid;
1466	psched = _schedulers[x][y][lpid];
1467
1468	// ctx_sr : value required before an eret instruction
1469	unsigned int ctx_sr = 0x0000FF13;
1470
1471	// ctx_ptpr : page table physical base address (shifted by 13 bit)
1472	unsigned int ctx_ptpr = (unsigned int)(_ptabs_paddr[vspace_id][x][y] >> 13);
1473
1474	// ctx_ptab : page_table virtual base address
1475	unsigned int ctx_ptab = _ptabs_vaddr[vspace_id][x][y];
1476
1477	// ctx_epc : Get the virtual address of the memory location containing
1478	// the task entry point : the start_vector is stored by GCC in the seg_data
1479	// segment and we must wait the .elf loading to get the entry point value...
1480	vobj_id = vspace[vspace_id].start_vobj_id;
1481	unsigned int ctx_epc = vobj[vobj_id].vbase + (task[task_id].startid)*4;
1482
1483	// ctx_sp : Get the vobj containing the stack
1484	vobj_id = task[task_id].stack_vobj_id;
1485	unsigned int ctx_sp = vobj[vobj_id].vbase + vobj[vobj_id].length;
1486
1487	// get local task index in scheduler
1488	unsigned int ltid = psched->tasks;
1489
1490	// get vspace thread index
1491	unsigned int thread_id = task[task_id].trdid;
1492
1493	if (ltid >= IDLE_TASK_INDEX)
1494	{
1495	_puts("\n[BOOT ERROR] in boot_schedulers_init() : ");
1496	_putd( ltid );
1497	_puts(" tasks allocated to processor ");
1498	_putd( gpid );
1499	_puts(" / max is ");
1500	_putd( IDLE_TASK_INDEX );
1501	_puts("\n");
1502	_exit();
1503	}
1504
1505	// update the "tasks" and "current" fields in scheduler:
1506	// the first task to execute is task 0 as soon as there is at least
1507	// one task allocated to processor.
1508	psched->tasks = ltid + 1;
1509	psched->current = 0;
1510
1511	// initializes the task context
1512	psched->context[ltid][CTX_CR_ID] = 0;
1513	psched->context[ltid][CTX_SR_ID] = ctx_sr;
1514	psched->context[ltid][CTX_SP_ID] = ctx_sp;
1515	psched->context[ltid][CTX_EPC_ID] = ctx_epc;
1516	psched->context[ltid][CTX_PTPR_ID] = ctx_ptpr;
1517	psched->context[ltid][CTX_PTAB_ID] = ctx_ptab;
1518	psched->context[ltid][CTX_LTID_ID] = ltid;
1519	psched->context[ltid][CTX_GTID_ID] = task_id;
1520	psched->context[ltid][CTX_TRDID_ID] = thread_id;
1521	psched->context[ltid][CTX_VSID_ID] = vspace_id;
1522	psched->context[ltid][CTX_RUN_ID] = 1;
1523
1524	psched->context[ltid][CTX_TTY_ID] = 0xFFFFFFFF;
1525	psched->context[ltid][CTX_CMA_FB_ID] = 0xFFFFFFFF;
1526	psched->context[ltid][CTX_CMA_RX_ID] = 0xFFFFFFFF;
1527	psched->context[ltid][CTX_CMA_TX_ID] = 0xFFFFFFFF;
1528	psched->context[ltid][CTX_NIC_RX_ID] = 0xFFFFFFFF;
1529	psched->context[ltid][CTX_NIC_TX_ID] = 0xFFFFFFFF;
1530	psched->context[ltid][CTX_TIM_ID] = 0xFFFFFFFF;
1531	psched->context[ltid][CTX_HBA_ID] = 0xFFFFFFFF;
1532
1533	#if BOOT_DEBUG_SCHED
1534	_puts("\nTask ");
1535	_putd( task_id );
1536	_puts(" allocated to processor[");
1537	_putd( x );
1538	_puts(",");
1539	_putd( y );
1540	_puts(",");
1541	_putd( lpid );
1542	_puts("]\n - ctx[LTID] = ");
1543	_putd( psched->context[ltid][CTX_LTID_ID] );
1544	_puts("\n - ctx[SR] = ");
1545	_putx( psched->context[ltid][CTX_SR_ID] );
1546	_puts("\n - ctx[SP] = ");
1547	_putx( psched->context[ltid][CTX_SP_ID] );
1548	_puts("\n - ctx[EPC] = ");
1549	_putx( psched->context[ltid][CTX_EPC_ID] );
1550	_puts("\n - ctx[PTPR] = ");
1551	_putx( psched->context[ltid][CTX_PTPR_ID] );
1552	_puts("\n - ctx[PTAB] = ");
1553	_putx( psched->context[ltid][CTX_PTAB_ID] );
1554	_puts("\n - ctx[GTID] = ");
1555	_putx( psched->context[ltid][CTX_GTID_ID] );
1556	_puts("\n - ctx[VSID] = ");
1557	_putx( psched->context[ltid][CTX_VSID_ID] );
1558	_puts("\n - ctx[TRDID] = ");
1559	_putx( psched->context[ltid][CTX_TRDID_ID] );
1560	_puts("\n");
1561	#endif
1562
1563	} // end loop on tasks
1564	} // end loop on vspaces
1565	} // end boot_schedulers_init()
1566
1567	//////////////////////////////////////////////////////////////////////////////////
1568	// This function loads the map.bin file from block device.
1569	//////////////////////////////////////////////////////////////////////////////////
1570	void boot_mapping_init()
1571	{
1572	// desactivates IOC interrupt
1573	_ioc_init( 0 );
1574
1575	// open file "map.bin"
1576	int fd_id = _fat_open( IOC_BOOT_MODE,
1577	"map.bin",
1578	0 ); // no creation
1579	if ( fd_id == -1 )
1580	{
1581	_puts("\n[BOOT ERROR] : map.bin file not found \n");
1582	_exit();
1583	}
1584
1585	#if BOOT_DEBUG_MAPPING
1586	_puts("\n[BOOT] map.bin file successfully open at cycle ");
1587	_putd(_get_proctime());
1588	_puts("\n");
1589	#endif
1590
1591	// get "map.bin" file size (from fat) and check it
1592	unsigned int size = fat.fd[fd_id].file_size;
1593
1594	if ( size > SEG_BOOT_MAPPING_SIZE )
1595	{
1596	_puts("\n[BOOT ERROR] : allocated segment too small for map.bin file\n");
1597	_exit();
1598	}
1599
1600	// load "map.bin" file into buffer
1601	unsigned int nblocks = size >> 9;
1602	unsigned int offset = size & 0x1FF;
1603	if ( offset ) nblocks++;
1604
1605	unsigned int ok = _fat_read( IOC_BOOT_MODE,
1606	fd_id,
1607	(unsigned int*)SEG_BOOT_MAPPING_BASE,
1608	nblocks,
1609	0 ); // offset
1610	if ( ok == -1 )
1611	{
1612	_puts("\n[BOOT ERROR] : unable to load map.bin file \n");
1613	_exit();
1614	}
1615	_fat_close( fd_id );
1616
1617	// close file "map.bin"
1618	boot_mapping_check();
1619
1620	} // end boot_mapping_init()
1621
1622
1623	/////////////////////////////////////////////////////////////////////////////////////
1624	// This function load all loadable segments for one .elf file, identified
1625	// by the "pathname" argument. Some loadable segments can be copied in several
1626	// clusters: same virtual address but different physical addresses.
1627	// - It open the file.
1628	// - It loads the complete file in the dedicated boot_elf_buffer.
1629	// - It copies each loadable segments at the virtual address defined in
1630	// the .elf file, making several copies if the target vseg is not local.
1631	// - It closes the file.
1632	// This function is supposed to be executed by processor[0,0,0].
1633	// Note:
1634	// We must use physical addresses to reach the destination buffers that
1635	// can be located in remote clusters. We use either a _physical_memcpy(),
1636	// or a _dma_physical_copy() if DMA is available.
1637	//////////////////////////////////////////////////////////////////////////////////////
1638	void load_one_elf_file( unsigned int is_kernel, // kernel file if non zero
1639	char* pathname,
1640	unsigned int vspace_id ) // to scan the proper vspace
1641	{
1642	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1643	mapping_vspace_t * vspace = _get_vspace_base(header);
1644	mapping_vseg_t * vseg = _get_vseg_base(header);
1645	mapping_vobj_t * vobj = _get_vobj_base(header);
1646
1647	unsigned int seg_id;
1648
1649	#if BOOT_DEBUG_ELF
1650	_puts("\n[BOOT DEBUG] Start searching file ");
1651	_puts( pathname );
1652	_puts(" at cycle ");
1653	_putd( _get_proctime() );
1654	_puts("\n");
1655	#endif
1656
1657	// open .elf file
1658	int fd_id = _fat_open( IOC_BOOT_MODE,
1659	pathname,
1660	0 ); // no creation
1661	if ( fd_id < 0 )
1662	{
1663	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1664	_puts( pathname );
1665	_puts(" not found\n");
1666	_exit();
1667	}
1668
1669	// check buffer size versus file size
1670	if ( fat.fd[fd_id].file_size > GIET_ELF_BUFFER_SIZE )
1671	{
1672	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1673	_puts( pathname );
1674	_puts(" exceeds the GIET_ELF_BUFFERSIZE defined in giet_config.h\n");
1675	_exit();
1676	}
1677
1678	// compute number of sectors
1679	unsigned int nbytes = fat.fd[fd_id].file_size;
1680	unsigned int nsectors = nbytes>>9;
1681	if( nbytes & 0x1FF) nsectors++;
1682
1683	// load file in elf buffer
1684	if( _fat_read( IOC_BOOT_MODE,
1685	fd_id,
1686	boot_elf_buffer,
1687	nsectors,
1688	0 ) != nsectors )
1689	{
1690	_puts("\n[BOOT ERROR] load_one_elf_file() : unexpected EOF for file ");
1691	_puts( pathname );
1692	_puts("\n");
1693	_exit();
1694	}
1695
1696	// Check ELF Magic Number in ELF header
1697	Elf32_Ehdr* elf_header_ptr = (Elf32_Ehdr*)boot_elf_buffer;
1698
1699	if ( (elf_header_ptr->e_ident[EI_MAG0] != ELFMAG0) \|\|
1700	(elf_header_ptr->e_ident[EI_MAG1] != ELFMAG1) \|\|
1701	(elf_header_ptr->e_ident[EI_MAG2] != ELFMAG2) \|\|
1702	(elf_header_ptr->e_ident[EI_MAG3] != ELFMAG3) )
1703	{
1704	_puts("\n[BOOT ERROR] load_elf() : file ");
1705	_puts( pathname );
1706	_puts(" does not use ELF format\n");
1707	_exit();
1708	}
1709
1710	// get program header table pointer
1711	unsigned int pht_index = elf_header_ptr->e_phoff;
1712	if( pht_index == 0 )
1713	{
1714	_puts("\n[BOOT ERROR] load_one_elf_file() : file ");
1715	_puts( pathname );
1716	_puts(" does not contain loadable segment\n");
1717	_exit();
1718	}
1719	Elf32_Phdr* elf_pht_ptr = (Elf32_Phdr*)(boot_elf_buffer + pht_index);
1720
1721	// get number of segments
1722	unsigned int nsegments = elf_header_ptr->e_phnum;
1723
1724	_puts("\n[BOOT] File ");
1725	_puts( pathname );
1726	_puts(" loaded at cycle ");
1727	_putd( _get_proctime() );
1728	_puts("\n");
1729
1730	// Loop on loadable segments in the .elf file
1731	for (seg_id = 0 ; seg_id < nsegments ; seg_id++)
1732	{
1733	if(elf_pht_ptr[seg_id].p_type == PT_LOAD)
1734	{
1735	// Get segment attributes
1736	unsigned int seg_vaddr = elf_pht_ptr[seg_id].p_vaddr;
1737	unsigned int seg_offset = elf_pht_ptr[seg_id].p_offset;
1738	unsigned int seg_filesz = elf_pht_ptr[seg_id].p_filesz;
1739	unsigned int seg_memsz = elf_pht_ptr[seg_id].p_memsz;
1740
1741	#if BOOT_DEBUG_ELF
1742	_puts(" - segment ");
1743	_putd( seg_id );
1744	_puts(" / vaddr = ");
1745	_putx( seg_vaddr );
1746	_puts(" / file_size = ");
1747	_putx( seg_filesz );
1748	_puts("\n");
1749	#endif
1750
1751	if( seg_memsz < seg_filesz )
1752	{
1753	_puts("\n[BOOT ERROR] load_one_elf_file() : segment at vaddr = ");
1754	_putx( seg_vaddr );
1755	_puts(" in file ");
1756	_puts( pathname );
1757	_puts(" has memsz < filesz \n");
1758	_exit();
1759	}
1760
1761	// fill empty space with 0 as required
1762	if( seg_memsz > seg_filesz )
1763	{
1764	unsigned int i;
1765	for( i = seg_filesz ; i < seg_memsz ; i++ ) boot_elf_buffer[i+seg_offset] = 0;
1766	}
1767
1768	unsigned int src_vaddr = (unsigned int)boot_elf_buffer + seg_offset;
1769
1770	// search all vsegs matching the virtual address
1771	unsigned int vseg_first;
1772	unsigned int vseg_last;
1773	unsigned int vseg_id;
1774	unsigned int found = 0;
1775	if ( is_kernel )
1776	{
1777	vseg_first = 0;
1778	vseg_last = header->globals;
1779	}
1780	else
1781	{
1782	vseg_first = vspace[vspace_id].vseg_offset;
1783	vseg_last = vseg_first + vspace[vspace_id].vsegs;
1784	}
1785
1786	for ( vseg_id = vseg_first ; vseg_id < vseg_last ; vseg_id++ )
1787	{
1788	if ( seg_vaddr == vseg[vseg_id].vbase ) // matching
1789	{
1790	found = 1;
1791
1792	// get destination buffer physical address and size
1793	paddr_t seg_paddr = vseg[vseg_id].pbase;
1794	unsigned int vobj_id = vseg[vseg_id].vobj_offset;
1795	unsigned int seg_size = vobj[vobj_id].length;
1796
1797	#if BOOT_DEBUG_ELF
1798	_puts(" loaded into vseg ");
1799	_puts( vseg[vseg_id].name );
1800	_puts(" at paddr = ");
1801	_putl( seg_paddr );
1802	_puts(" (buffer size = ");
1803	_putx( seg_size );
1804	_puts(")\n");
1805	#endif
1806	// check vseg size
1807	if ( seg_size < seg_filesz )
1808	{
1809	_puts("\n[BOOT ERROR] in load_one_elf_file()\n");
1810	_puts("vseg ");
1811	_puts( vseg[vseg_id].name );
1812	_puts(" is to small for loadable segment ");
1813	_putx( seg_vaddr );
1814	_puts(" in file ");
1815	_puts( pathname );
1816	_puts(" \n");
1817	_exit();
1818	}
1819
1820	// copy the segment from boot buffer to destination buffer
1821	// using DMA channel[0,0,0] if it is available.
1822	if( NB_DMA_CHANNELS > 0 )
1823	{
1824	_dma_physical_copy( 0, // DMA in cluster[0,0]
1825	0, // DMA channel 0
1826	(paddr_t)seg_paddr, // destination paddr
1827	(paddr_t)src_vaddr, // source paddr
1828	seg_filesz ); // size
1829	}
1830	else
1831	{
1832	_physical_memcpy( (paddr_t)seg_paddr, // destination paddr
1833	(paddr_t)src_vaddr, // source paddr
1834	seg_filesz ); // size
1835	}
1836	}
1837	} // end for vsegs in vspace
1838
1839	// check at least one matching vseg
1840	if ( found == 0 )
1841	{
1842	_puts("\n[BOOT ERROR] in load_one_elf_file()\n");
1843	_puts("vseg for loadable segment ");
1844	_putx( seg_vaddr );
1845	_puts(" in file ");
1846	_puts( pathname );
1847	_puts(" not found: \n");
1848	_puts(" check consistency between the .py and .ld files...\n");
1849	_exit();
1850	}
1851	}
1852	} // end for loadable segments
1853
1854	// close .elf file
1855	_fat_close( fd_id );
1856
1857	} // end load_one_elf_file()
1858
1859
1860	/////i////////////////////////////////////////////////////////////////////////////////
1861	// This function uses the map.bin data structure to load the "kernel.elf" file
1862	// as well as the various "application.elf" files into memory.
1863	// - The "preloader.elf" file is not loaded, because it has been burned in the ROM.
1864	// - The "boot.elf" file is not loaded, because it has been loaded by the preloader.
1865	// This function scans all vobjs defined in the map.bin data structure to collect
1866	// all .elf files pathnames, and calls the load_one_elf_file() for each .elf file.
1867	// As the code can be replicated in several vsegs, the same code can be copied
1868	// in one or several clusters by the load_one_elf_file() function.
1869	//////////////////////////////////////////////////////////////////////////////////////
1870	void boot_elf_load()
1871	{
1872	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1873	mapping_vspace_t* vspace = _get_vspace_base( header );
1874	mapping_vobj_t* vobj = _get_vobj_base( header );
1875	unsigned int vspace_id;
1876	unsigned int vobj_id;
1877	unsigned int found;
1878
1879	// Scan all vobjs corresponding to global vsegs,
1880	// to find the pathname to the kernel.elf file
1881	found = 0;
1882	for( vobj_id = 0 ; vobj_id < header->globals ; vobj_id++ )
1883	{
1884	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
1885	{
1886	found = 1;
1887	break;
1888	}
1889	}
1890
1891	// We need one kernel.elf file
1892	if (found == 0)
1893	{
1894	_puts("[BOOT ERROR] boot_elf_load() : kernel.elf file not found\n");
1895	_exit();
1896	}
1897
1898	// Load the kernel
1899	load_one_elf_file( 1, // kernel file
1900	vobj[vobj_id].binpath, // file pathname
1901	0 ); // vspace 0
1902
1903	// loop on the vspaces, scanning all vobjs in the vspace,
1904	// to find the pathname of the .elf file associated to the vspace.
1905	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
1906	{
1907	// loop on the vobjs in vspace (vobj_id is the global index)
1908	unsigned int found = 0;
1909	for (vobj_id = vspace[vspace_id].vobj_offset;
1910	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1911	vobj_id++)
1912	{
1913	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
1914	{
1915	found = 1;
1916	break;
1917	}
1918	}
1919
1920	// We want one .elf file per vspace
1921	if (found == 0)
1922	{
1923	_puts("[BOOT ERROR] boot_elf_load() : .elf file not found for vspace ");
1924	_puts( vspace[vspace_id].name );
1925	_puts("\n");
1926	_exit();
1927	}
1928
1929	load_one_elf_file( 0, // not a kernel file
1930	vobj[vobj_id].binpath, // file pathname
1931	vspace_id ); // vspace index
1932
1933	} // end for vspaces
1934
1935	} // end boot_elf_load()
1936
1937	////////////////////////////////////////////////////////////////////////////////
1938	// This function intializes the periherals and coprocessors, as specified
1939	// in the mapping_info file.
1940	////////////////////////////////////////////////////////////////////////////////
1941	void boot_peripherals_init()
1942	{
1943	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1944	mapping_cluster_t * cluster = _get_cluster_base(header);
1945	mapping_periph_t * periph = _get_periph_base(header);
1946	mapping_vobj_t * vobj = _get_vobj_base(header);
1947	mapping_coproc_t * coproc = _get_coproc_base(header);
1948	mapping_cp_port_t * cp_port = _get_cp_port_base(header);
1949	mapping_irq_t * irq = _get_irq_base(header);
1950
1951	unsigned int cluster_id;
1952	unsigned int periph_id;
1953	unsigned int coproc_id;
1954	unsigned int cp_port_id;
1955	unsigned int channel_id;
1956
1957	// loop on all physical clusters
1958	for (cluster_id = 0; cluster_id < X_SIZE*Y_SIZE; cluster_id++)
1959	{
1960	// computes cluster coordinates
1961	unsigned int x = cluster[cluster_id].x;
1962	unsigned int y = cluster[cluster_id].y;
1963	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1964
1965	#if BOOT_DEBUG_PERI
1966	_puts("\n[BOOT DEBUG] Peripherals initialisation in cluster[");
1967	_putd( x );
1968	_puts(",");
1969	_putd( y );
1970	_puts("]\n");
1971	#endif
1972
1973	// loop on peripherals
1974	for (periph_id = cluster[cluster_id].periph_offset;
1975	periph_id < cluster[cluster_id].periph_offset +
1976	cluster[cluster_id].periphs; periph_id++)
1977	{
1978	unsigned int type = periph[periph_id].type;
1979	unsigned int subtype = periph[periph_id].subtype;
1980	unsigned int channels = periph[periph_id].channels;
1981
1982	switch (type)
1983	{
1984	case PERIPH_TYPE_IOC: // vci_block_device component
1985	{
1986	if ( subtype == PERIPH_SUBTYPE_BDV )
1987	{
1988	_bdv_lock.value = 0;
1989	#if BOOT_DEBUG_PERI
1990	_puts("- BDV : channels = ");
1991	_putd(channels);
1992	_puts("\n");
1993	#endif
1994	}
1995	else if ( subtype == PERIPH_SUBTYPE_HBA )
1996	{
1997	// TODO
1998	}
1999	else if ( subtype == PERIPH_SUBTYPE_SPI )
2000	{
2001	// TODO
2002	}
2003	break;
2004	}
2005	case PERIPH_TYPE_CMA: // vci_chbuf_dma component
2006	{
2007	for (channel_id = 0; channel_id < channels; channel_id++)
2008	{
2009	// TODO
2010	}
2011	#if BOOT_DEBUG_PERI
2012	_puts("- CMA : channels = ");
2013	_putd(channels);
2014	_puts("\n");
2015	#endif
2016	break;
2017	}
2018	case PERIPH_TYPE_NIC: // vci_multi_nic component
2019	{
2020	for (channel_id = 0; channel_id < channels; channel_id++)
2021	{
2022	// TODO
2023	}
2024	#if BOOT_DEBUG_PERI
2025	_puts("- NIC : channels = ");
2026	_putd(channels);
2027	_puts("\n");
2028	#endif
2029	break;
2030	}
2031	case PERIPH_TYPE_TTY: // vci_multi_tty component
2032	{
2033	for (channel_id = 0; channel_id < channels; channel_id++)
2034	{
2035	_tty_lock[channel_id].value = 0;
2036	_tty_rx_full[channel_id] = 0;
2037	}
2038	#if BOOT_DEBUG_PERI
2039	_puts("- TTY : channels = ");
2040	_putd(channels);
2041	_puts("\n");
2042	#endif
2043	break;
2044	}
2045	case PERIPH_TYPE_IOB: // vci_io_bridge component
2046	{
2047	if (GIET_USE_IOMMU)
2048	{
2049	// TODO
2050	// get the iommu page table physical address
2051	// set IOMMU page table address
2052	// pseg_base[IOB_IOMMU_PTPR] = ptab_pbase;
2053	// activate IOMMU
2054	// pseg_base[IOB_IOMMU_ACTIVE] = 1;
2055	}
2056	break;
2057	}
2058	case PERIPH_TYPE_PIC: // vci_iopic component
2059	{
2060	#if BOOT_DEBUG_PERI
2061	_puts("- PIC : channels = ");
2062	_putd(channels);
2063	_puts("\n");
2064	#endif
2065	// scan all IRQs defined in mapping for PIC component,
2066	// and initialises addresses for WTI IRQs
2067	for ( channel_id = periph[periph_id].irq_offset ;
2068	channel_id < periph[periph_id].irq_offset + periph[periph_id].irqs ;
2069	channel_id++ )
2070	{
2071	unsigned int hwi_id = irq[channel_id].srcid; // HWI index in PIC
2072	unsigned int wti_id = irq[channel_id].dest_id; // WTI index in XCU
2073	unsigned int cluster_xy = irq[channel_id].dest_xy; // XCU coordinates
2074	unsigned int vaddr;
2075
2076	_xcu_get_wti_address( wti_id, &vaddr );
2077	_pic_init( hwi_id, vaddr, cluster_xy );
2078
2079	#if BOOT_DEBUG_PERI
2080	unsigned int address = _pic_get_register( channel_id, IOPIC_ADDRESS );
2081	unsigned int extend = _pic_get_register( channel_id, IOPIC_EXTEND );
2082	_puts(" hwi_index = ");
2083	_putd( hwi_id );
2084	_puts(" / wti_index = ");
2085	_putd( wti_id );
2086	_puts(" / vaddr = ");
2087	_putx( vaddr );
2088	_puts(" in cluster[");
2089	_putd( cluster_xy >> Y_WIDTH );
2090	_puts(",");
2091	_putd( cluster_xy & ((1<<Y_WIDTH)-1) );
2092	_puts("] / checked_xcu_paddr = ");
2093	_putl( (paddr_t)address + (((paddr_t)extend)<<32) );
2094	_puts("\n");
2095	#endif
2096	}
2097	break;
2098	}
2099	} // end switch periph type
2100	} // end for periphs
2101
2102	#if BOOT_DEBUG_PERI
2103	_puts("\n[BOOT DEBUG] Coprocessors initialisation in cluster[");
2104	_putd( x );
2105	_puts(",");
2106	_putd( y );
2107	_puts("]\n");
2108	#endif
2109
2110	// loop on coprocessors
2111	for ( coproc_id = cluster[cluster_id].coproc_offset;
2112	coproc_id < cluster[cluster_id].coproc_offset +
2113	cluster[cluster_id].coprocs; coproc_id++ )
2114	{
2115
2116	#if BOOT_DEBUG_PERI
2117	_puts("- coprocessor name : ");
2118	_puts(coproc[coproc_id].name);
2119	_puts(" / nb ports = ");
2120	_putd((unsigned int) coproc[coproc_id].ports);
2121	_puts("\n");
2122	#endif
2123	// loop on the coprocessor ports
2124	for ( cp_port_id = coproc[coproc_id].port_offset;
2125	cp_port_id < coproc[coproc_id].port_offset + coproc[coproc_id].ports;
2126	cp_port_id++ )
2127	{
2128	// get global index of associted vobj
2129	unsigned int vobj_id = cp_port[cp_port_id].mwmr_vobj_id;
2130
2131	// get MWMR channel base address
2132	page_table_t* ptab = (page_table_t*)_ptabs_vaddr[0][x][y];
2133	unsigned int vbase = vobj[vobj_id].vbase;
2134	unsigned int ppn;
2135	unsigned int flags;
2136	paddr_t pbase;
2137
2138	_v2p_translate( ptab,
2139	vbase>>12 ,
2140	&ppn,
2141	&flags );
2142
2143	pbase = ((paddr_t)ppn)<<12;
2144
2145	// initialise cp_port
2146	_mwr_hw_init( cluster_xy,
2147	cp_port_id,
2148	cp_port[cp_port_id].direction,
2149	pbase );
2150	#if BOOT_DEBUG_PERI
2151	_puts(" port direction: ");
2152	_putd( (unsigned int)cp_port[cp_port_id].direction );
2153	_puts(" / mwmr_channel_pbase = ");
2154	_putl( pbase );
2155	_puts(" / name = ");
2156	_puts(vobj[vobj_id].name);
2157	_puts("\n");
2158	#endif
2159	} // end for cp_ports
2160	} // end for coprocs
2161	} // end for clusters
2162	} // end boot_peripherals_init()
2163
2164	/////////////////////////////////////////////////////////////////////////
2165	// This function initialises the physical memory allocators in each
2166	// cluster containing a RAM pseg.
2167	/////////////////////////////////////////////////////////////////////////
2168	void boot_pmem_init()
2169	{
2170	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2171	mapping_cluster_t* cluster = _get_cluster_base(header);
2172	mapping_pseg_t* pseg = _get_pseg_base(header);
2173
2174	unsigned int cluster_id;
2175	unsigned int pseg_id;
2176
2177	// scan all clusters
2178	for ( cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++ )
2179	{
2180	// scan the psegs in cluster to find first pseg of type RAM
2181	unsigned int pseg_min = cluster[cluster_id].pseg_offset;
2182	unsigned int pseg_max = pseg_min + cluster[cluster_id].psegs;
2183	for ( pseg_id = pseg_min ; pseg_id < pseg_max ; pseg_id++ )
2184	{
2185	if ( pseg[pseg_id].type == PSEG_TYPE_RAM )
2186	{
2187	unsigned int x = cluster[cluster_id].x;
2188	unsigned int y = cluster[cluster_id].y;
2189	unsigned int base = (unsigned int)pseg[pseg_id].base;
2190	unsigned int size = (unsigned int)pseg[pseg_id].length;
2191	_pmem_alloc_init( x, y, base, size );
2192
2193	#if BOOT_DEBUG_PT
2194	_puts("\n[BOOT DEBUG] pmem allocator initialised in cluster[");
2195	_putd( x );
2196	_puts(",");
2197	_putd( y );
2198	_puts("] base = ");
2199	_putx( base );
2200	_puts(" / size = ");
2201	_putx( size );
2202	_puts("\n");
2203	#endif
2204	break;
2205	}
2206	}
2207	}
2208	} // end boot_pmem_init()
2209
2210	/////////////////////////////////////////////////////////////////////////
2211	// This function is the entry point of the boot code for all processors.
2212	// Most of this code is executed by Processor 0 only.
2213	/////////////////////////////////////////////////////////////////////////
2214	void boot_init()
2215	{
2216	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2217	mapping_cluster_t* cluster = _get_cluster_base(header);
2218	unsigned int gpid = _get_procid();
2219
2220	if ( gpid == 0 ) // only Processor 0 does it
2221	{
2222	_puts("\n[BOOT] boot_init start at cycle ");
2223	_putd(_get_proctime());
2224	_puts("\n");
2225
2226	// Load the map.bin file into memory and check it
2227	boot_mapping_init();
2228
2229	_puts("\n[BOOT] Mapping \"");
2230	_puts( header->name );
2231	_puts("\" loaded at cycle ");
2232	_putd(_get_proctime());
2233	_puts("\n");
2234
2235	// Initializes the physical memory allocators
2236	boot_pmem_init();
2237
2238	_puts("\n[BOOT] Physical memory allocators initialised at cycle ");
2239	_putd(_get_proctime());
2240	_puts("\n");
2241
2242	// Build page tables
2243	boot_ptabs_init();
2244
2245	_puts("\n[BOOT] Page tables initialised at cycle ");
2246	_putd(_get_proctime());
2247	_puts("\n");
2248
2249	// Activate MMU for proc [0,0,0]
2250	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0][0][0]>>13) );
2251	_set_mmu_mode( 0xF );
2252
2253	_puts("\n[BOOT] Processor[0,0,0] : MMU activation at cycle ");
2254	_putd(_get_proctime());
2255	_puts("\n");
2256
2257	// Initialise private vobjs in vspaces
2258	boot_vobjs_init();
2259
2260	_puts("\n[BOOT] Private vobjs initialised at cycle ");
2261	_putd(_get_proctime());
2262	_puts("\n");
2263
2264	// Initialise schedulers
2265	boot_schedulers_init();
2266
2267	_puts("\n[BOOT] Schedulers initialised at cycle ");
2268	_putd(_get_proctime());
2269	_puts("\n");
2270
2271	// Set CP0_SCHED register for proc [0,0,0]
2272	_set_sched( (unsigned int)_schedulers[0][0][0] );
2273
2274	// Initialise non replicated peripherals
2275	boot_peripherals_init();
2276
2277	_puts("\n[BOOT] Non replicated peripherals initialised at cycle ");
2278	_putd(_get_proctime());
2279	_puts("\n");
2280
2281	// Loading all .elf files
2282	boot_elf_load();
2283
2284	// P0 starts all other processors
2285	unsigned int clusterid, p;
2286
2287	for ( clusterid = 0 ; clusterid < X_SIZE*Y_SIZE ; clusterid++ )
2288	{
2289	unsigned int nprocs = cluster[clusterid].procs;
2290	unsigned int x = cluster[clusterid].x;
2291	unsigned int y = cluster[clusterid].y;
2292	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
2293
2294	for ( p = 0 ; p < nprocs; p++ )
2295	{
2296	if ( (nprocs > 0) && ((clusterid != 0) \|\| (p != 0)) )
2297	{
2298	_xcu_send_wti( cluster_xy, p, (unsigned int)boot_entry );
2299	}
2300	}
2301	}
2302
2303	} // end monoprocessor boot
2304
2305	///////////////////////////////////////////////////////////////////////////////
2306	// Parallel execution starts actually here
2307	///////////////////////////////////////////////////////////////////////////////
2308
2309	// all processor initialise the SCHED register
2310	// from the _schedulers[x][y][lpid array]
2311	unsigned int cluster_xy = gpid >> P_WIDTH;
2312	unsigned int lpid = gpid & ((1<<P_WIDTH)-1);
2313	unsigned int x = cluster_xy >> Y_WIDTH;
2314	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
2315	_set_sched( (unsigned int)_schedulers[x][y][lpid] );
2316
2317	// all processors (but Proc[0,0,0]) activate MMU
2318	if ( gpid != 0 )
2319	{
2320	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0][x][y]>>13) );
2321	_set_mmu_mode( 0xF );
2322	}
2323
2324	// all processors reset BEV bit in the status register to use
2325	// the GIET_VM exception handler instead of the PRELOADER exception handler
2326	_set_sr( 0 );
2327
2328	// all processors jump to kernel_init
2329	// using the address defined in the giet_vsegs.ld file
2330	unsigned int kernel_entry = (unsigned int)&kernel_init_vbase;
2331	asm volatile( "jr %0" ::"r"(kernel_entry) );
2332
2333	} // end boot_init()
2334
2335
2336	// Local Variables:
2337	// tab-width: 4
2338	// c-basic-offset: 4
2339	// c-file-offsets:((innamespace . 0)(inline-open . 0))
2340	// indent-tabs-mode: nil
2341	// End:
2342	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
2343

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