Context Navigation

source: soft/giet_vm/giet_boot/boot.c @ 291

Last change on this file since 291 was 289, checked in by cfuguet, 11 years ago

Modifications on GIET-VM IOC driver:

Introducing new layer on the IOC driver. Every call to ioc_read, ioc_write, ioc_get_block_size or ioc_init

functions will call the specific driver of the used IOC
controller. Supported IOC controllers are (for now) :

BDV (Soclib Block Device)
HBA
SPI (SDCARD - SPI controller)

All functions of IOC controllers drivers respect the same interface.

To specify the used IOC controller of the platform, a subtype field has been introduced on the map.xml file. This subtype field must be declared on the IOC periph instantiation. Available subtypes (for now) : BDV, HBA or SPI.

File size: 76.5 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, but the
11	// physicals addresses can have up to 40 bits, and use the (unsigned long long) type.
12	// It natively supports clusterised shared mmemory multi-processors architectures,
13	// where each processor is identified by a composite index (cluster_xy, local_id),
14	// and where there is one physical memory bank per cluster.
15	//
16	// This code is executed in the boot phase by proc[0] and performs the following tasks:
17	// - load into memory the giet_vm binary files, contained in a FAT32 file system,
18	// - build the various page tables (one page table per vspace)
19	// - initialize the shedulers (one scheduler per processor)
20	//
21	// 1) The binary files to be loaded are:
22	// - the "map.bin" file contains the hardware architecture description and the
23	// mapping directives. It must be stored in the the seg_boot_mapping segment
24	// (at address seg_boot_mapping_base).
25	// - the "sys.elf" file contains the kernel binary code and data.
26	// - the various "application.elf" files.
27	//
28	// 2) The map.bin file contains the binary representation of the map.xml file defining:
29	// - the hardware architecture: number of clusters, number or processors,
30	// size of the memory segments, and peripherals in each cluster.
31	// - The structure of the various multi-threaded software applications:
32	// number of tasks, communication channels.
33	// - The mapping: placement of virtual objects (vobj) in the virtual segments (vseg),
34	// placement of virtual segments (vseg) in the physical segments (pseg), placement
35	// of software tasks on the processors,
36	//
37	// 3) The GIET-VM uses the paged virtual memory to provides two services:
38	// - classical memory protection, when several independant applications compiled
39	// in different virtual spaces are executing on the same hardware platform.
40	// - data placement in NUMA architectures, when we want to control the placement
41	// of the software objects (virtual segments) on the physical memory banks.
42	//
43	// The page table are statically build in the boot phase, and they do not
44	// change during execution. The GIET uses only 4 Kbytes pages.
45	// As most applications use only a limited number of segments, the number of PT2s
46	// actually used by a given virtual space is generally smaller than 2048, and is
47	// computed during the boot phase.
48	// The max number of virtual spaces (GIET_NB_VSPACE_MAX) is a configuration parameter.
49	//
50	// Each page table (one page table per virtual space) is monolithic, and contains
51	// one PT1 and up to (GIET_NB_PT2_MAX) PT2s. The PT1 is addressed using the ix1 field
52	// (11 bits) of the VPN, and the selected PT2 is addressed using the ix2 field (9 bits).
53	// - PT1[2048] : a first 8K aligned array of unsigned int, indexed by (ix1) field of VPN.
54	// Each entry in the PT1 contains a 32 bits PTD. The MSB bit PTD[31] is
55	// the PTD valid bit, and LSB bits PTD[19:0] are the 20 MSB bits of the physical base
56	// address of the selected PT2.
57	// The PT1 contains 2048 PTD of 4 bytes => 8K bytes.
58	// - PT2[1024][GIET_NB_PT2_MAX] : an array of array of unsigned int.
59	// Each PT2[1024] must be 4K aligned, each entry in a PT2 contains two unsigned int:
60	// the first word contains the protection flags, and the second word contains the PPN.
61	// Each PT2 contains 512 PTE2 of 8bytes => 4K bytes.
62	// The total size of a page table is finally = 8K + (GIET_NB_PT2_MAX)*4K bytes.
63	///////////////////////////////////////////////////////////////////////////////////////
64	// Implementation Notes:
65	//
66	// 1) The cluster_id variable is a linear index in the mapping_info array of clusters.
67	// We use the cluster_xy variable for the tological index = x << Y_WIDTH + y
68	///////////////////////////////////////////////////////////////////////////////////////
69
70	// for vobjs initialisation
71	#include <giet_config.h>
72	#include <mwmr_channel.h>
73	#include <barrier.h>
74	#include <memspace.h>
75	#include <tty_driver.h>
76	#include <xcu_driver.h>
77	#include <ioc_driver.h>
78	#include <dma_driver.h>
79	#include <cma_driver.h>
80	#include <nic_driver.h>
81	#include <ioc_driver.h>
82	#include <mwr_driver.h>
83	#include <ctx_handler.h>
84	#include <irq_handler.h>
85	#include <vmem.h>
86	#include <utils.h>
87	#include <elf-types.h>
88
89	// for boot FAT initialisation
90	#include <fat32.h>
91
92	#include <mips32_registers.h>
93	#include <stdarg.h>
94
95	#if !defined(X_SIZE)
96	# error The X_SIZE value must be defined in the 'hard_config.h' file !
97	#endif
98
99	#if !defined(Y_SIZE)
100	# error The Y_SIZE value must be defined in the 'hard_config.h' file !
101	#endif
102
103	#if !defined(X_WIDTH)
104	# error The X_WIDTH value must be defined in the 'hard_config.h' file !
105	#endif
106
107	#if !defined(Y_WIDTH)
108	# error The Y_WIDTH value must be defined in the 'hard_config.h' file !
109	#endif
110
111	#if !defined(NB_PROCS_MAX)
112	# error The NB_PROCS_MAX value must be defined in the 'hard_config.h' file !
113	#endif
114
115	#if !defined(GIET_NB_VSPACE_MAX)
116	# error The GIET_NB_VSPACE_MAX value must be defined in the 'giet_config.h' file !
117	#endif
118
119	////////////////////////////////////////////////////////////////////////////
120	// Global variables for boot code
121	// Both the page tables for the various virtual spaces, and the schedulers
122	// for the processors are physically distributed on the clusters.
123	// These global variables are just arrays of pointers.
124	////////////////////////////////////////////////////////////////////////////
125
126	// This global variable is allocated in "fat32.c" file
127	extern fat32_fs_t fat;
128
129	// Page table addresses arrays
130	__attribute__((section (".bootdata")))
131	paddr_t _ptabs_paddr[GIET_NB_VSPACE_MAX];
132
133	__attribute__((section (".bootdata")))
134	unsigned int _ptabs_vaddr[GIET_NB_VSPACE_MAX];
135
136	// Next free PT2 index array
137	__attribute__((section (".bootdata")))
138	unsigned int _next_free_pt2[GIET_NB_VSPACE_MAX] =
139	{ [0 ... GIET_NB_VSPACE_MAX - 1] = 0 };
140
141	// Max PT2 index
142	__attribute__((section (".bootdata")))
143	unsigned int _max_pt2[GIET_NB_VSPACE_MAX] =
144	{ [0 ... GIET_NB_VSPACE_MAX - 1] = 0 };
145
146	// Scheduler pointers array (virtual addresses)
147	// indexed by (x,y,lpid) : ((x << Y_WIDTH) + y)*NB_PROCS_MAX + lpid
148	__attribute__((section (".bootdata")))
149	static_scheduler_t* _schedulers[NB_PROCS_MAX<<(X_WIDTH+Y_WIDTH)];
150
151
152	/////////////////////////////////////////////////////////////////////
153	// This function checks consistence beween the mapping_info data
154	// structure (soft), and the giet_config file (hard).
155	/////////////////////////////////////////////////////////////////////
156	void boot_mapping_check()
157	{
158	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
159
160	// checking mapping availability
161	if (header->signature != IN_MAPPING_SIGNATURE)
162	{
163	_puts("\n[BOOT ERROR] Illegal mapping signature: ");
164	_putx(header->signature);
165	_puts("\n");
166	_exit();
167	}
168
169	// checking number of clusters
170	if ( (header->x_size != X_SIZE) \|\|
171	(header->y_size != Y_SIZE) \|\|
172	(header->x_width != X_WIDTH) \|\|
173	(header->y_width != Y_WIDTH) )
174	{
175	_puts("\n[BOOT ERROR] Incoherent X_SIZE or Y_SIZE ");
176	_puts("\n - In hard_config: X_SIZE = ");
177	_putd( X_SIZE );
178	_puts(" / Y_SIZE = ");
179	_putd( Y_SIZE );
180	_puts(" / X_WIDTH = ");
181	_putd( X_WIDTH );
182	_puts(" / Y_WIDTH = ");
183	_putd( Y_WIDTH );
184	_puts("\n - In mapping_info: x_size = ");
185	_putd( header->x_size );
186	_puts(" / y_size = ");
187	_putd( header->y_size );
188	_puts(" / x_width = ");
189	_putd( header->x_width );
190	_puts(" / y_width = ");
191	_putd( header->y_width );
192	_puts("\n");
193	_exit();
194	}
195	// checking number of virtual spaces
196	if (header->vspaces > GIET_NB_VSPACE_MAX)
197	{
198	_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n");
199	_puts("\n");
200	_exit();
201	}
202
203	#if BOOT_DEBUG_MAPPING
204	_puts("\n - x_size = ");
205	_putd( header->x_size );
206	_puts("\n - y_size = ");
207	_putd( header->y_size );
208	_puts("\n - procs = ");
209	_putd( header->procs );
210	_puts("\n - periphs = ");
211	_putd( header->periphs );
212	_puts("\n - vspaces = ");
213	_putd( header->vspaces );
214	_puts("\n - tasks = ");
215	_putd( header->tasks );
216	_puts("\n");
217	_puts("\n - size of header = ");
218	_putd( MAPPING_HEADER_SIZE );
219	_puts("\n - size of cluster = ");
220	_putd( MAPPING_CLUSTER_SIZE );
221	_puts("\n - size of pseg = ");
222	_putd( MAPPING_PSEG_SIZE );
223	_puts("\n - size of proc = ");
224	_putd( MAPPING_PROC_SIZE );
225	_puts("\n - size of vspace = ");
226	_putd( MAPPING_VSPACE_SIZE );
227	_puts("\n - size of vseg = ");
228	_putd( MAPPING_VSEG_SIZE );
229	_puts("\n - size of vobj = ");
230	_putd( MAPPING_VOBJ_SIZE );
231	_puts("\n - size of task = ");
232	_putd( MAPPING_TASK_SIZE );
233	_puts("\n");
234
235	unsigned int cluster_id;
236	mapping_cluster_t * cluster = _get_cluster_base(header);
237	for( cluster_id = 0; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
238	{
239	_puts("\n - cluster[");
240	_putd( cluster[cluster_id].x );
241	_puts(",");
242	_putd( cluster[cluster_id].y );
243	_puts("]\n procs = ");
244	_putd( cluster[cluster_id].procs );
245	_puts("\n psegs = ");
246	_putd( cluster[cluster_id].psegs );
247	_puts("\n periphs = ");
248	_putd( cluster[cluster_id].periphs );
249	_puts("\n");
250	}
251	#endif
252
253	} // end boot_mapping_check()
254
255
256	//////////////////////////////////////////////////////////////////////////////
257	// boot_pseg_get()
258	// This function returns the pointer on a physical segment
259	// identified by the pseg index.
260	//////////////////////////////////////////////////////////////////////////////
261	mapping_pseg_t *boot_pseg_get(unsigned int seg_id)
262	{
263	mapping_header_t* header = (mapping_header_t*)(&seg_boot_mapping_base);
264	mapping_pseg_t * pseg = _get_pseg_base(header);
265
266	// checking argument
267	if (seg_id >= header->psegs)
268	{
269	_puts("\n[BOOT ERROR] : seg_id argument too large\n");
270	_puts(" in function boot_pseg_get()\n");
271	_exit();
272	}
273
274	return &pseg[seg_id];
275	}
276
277	//////////////////////////////////////////////////////////////////////////////
278	// boot_add_pte()
279	// This function registers a new PTE in the page table defined
280	// by the vspace_id argument, and updates both PT1 and PT2.
281	// A new PT2 is used when required.
282	// As the set of PT2s is implemented as a fixed size array (no dynamic
283	// allocation), this function checks a possible overflow of the PT2 array.
284	//////////////////////////////////////////////////////////////////////////////
285	void boot_add_pte(unsigned int vspace_id,
286	unsigned int vpn,
287	unsigned int flags,
288	unsigned int ppn,
289	unsigned int verbose)
290	{
291	unsigned int ix1;
292	unsigned int ix2;
293	paddr_t pt1_pbase; // PT1 physical base address
294	paddr_t pt2_pbase; // PT2 physical base address
295	paddr_t pte_paddr; // PTE physucal address
296	unsigned int pt2_id; // PT2 index
297	unsigned int ptd; // PTD : entry in PT1
298	unsigned int max_pt2; // max number of PT2s for a given vspace
299
300	ix1 = vpn >> 9; // 11 bits
301	ix2 = vpn & 0x1FF; // 9 bits
302
303	// check that the _max_pt2[vspace_id] has been set
304	max_pt2 = _max_pt2[vspace_id];
305
306	if (max_pt2 == 0)
307	{
308	_puts("Undefined page table for vspace ");
309	_putd(vspace_id);
310	_puts("\n");
311	_exit();
312	}
313
314
315	// get page table physical base address
316	pt1_pbase = _ptabs_paddr[vspace_id];
317
318	// get ptd in PT1
319	ptd = _physical_read(pt1_pbase + 4 * ix1);
320
321	if ((ptd & PTE_V) == 0) // invalid PTD: compute PT2 base address,
322	// and set a new PTD in PT1
323	{
324	pt2_id = _next_free_pt2[vspace_id];
325	if (pt2_id == max_pt2)
326	{
327	_puts("\n[BOOT ERROR] in boot_add_pte() function\n");
328	_puts("the length of the ptab vobj is too small\n");
329
330	_puts(" max_pt2 = ");
331	_putd( max_pt2 );
332	_puts("\n");
333	_puts(" pt2_id = ");
334	_putd( pt2_id );
335	_puts("\n");
336
337	_exit();
338	}
339	else
340	{
341	pt2_pbase = pt1_pbase + PT1_SIZE + PT2_SIZE * pt2_id;
342	ptd = PTE_V \| PTE_T \| (unsigned int) (pt2_pbase >> 12);
343	_physical_write( pt1_pbase + 4 * ix1, ptd);
344	_next_free_pt2[vspace_id] = pt2_id + 1;
345	}
346	}
347	else // valid PTD: compute PT2 base address
348	{
349	pt2_pbase = ((paddr_t)(ptd & 0x0FFFFFFF)) << 12;
350	}
351
352	// set PTE in PT2 : flags & PPN in two 32 bits words
353	pte_paddr = pt2_pbase + 8 * ix2;
354	_physical_write(pte_paddr , flags);
355	_physical_write(pte_paddr + 4, ppn);
356
357	if (verbose)
358	{
359	_puts(" / vpn = ");
360	_putx( vpn );
361	_puts(" / ix1 = ");
362	_putx( ix1 );
363	_puts(" / ix2 = ");
364	_putx( ix2 );
365	_puts(" / pt1_pbase = ");
366	_putl( pt1_pbase );
367	_puts(" / ptd = ");
368	_putl( ptd );
369	_puts(" / pt2_pbase = ");
370	_putl( pt2_pbase );
371	_puts(" / pte_paddr = ");
372	_putl( pte_paddr );
373	_puts(" / ppn = ");
374	_putx( ppn );
375	_puts("/\n");
376	}
377
378	} // end boot_add_pte()
379
380
381	/////////////////////////////////////////////////////////////////////
382	// This function build the page table for a given vspace.
383	// The physical base addresses for all vsegs (global and private)
384	// must have been previously computed and stored in the mapping.
385	// It initializes the MWMR channels.
386	/////////////////////////////////////////////////////////////////////
387	void boot_vspace_pt_build(unsigned int vspace_id)
388	{
389	unsigned int vseg_id;
390	unsigned int npages;
391	unsigned int ppn;
392	unsigned int vpn;
393	unsigned int flags;
394	unsigned int page_id;
395	unsigned int verbose = 0; // can be used to activate trace in add_pte()
396
397	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
398	mapping_vspace_t * vspace = _get_vspace_base(header);
399	mapping_vseg_t * vseg = _get_vseg_base(header);
400
401	// private segments
402	for (vseg_id = vspace[vspace_id].vseg_offset;
403	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
404	vseg_id++)
405	{
406	vpn = vseg[vseg_id].vbase >> 12;
407	ppn = (unsigned int) (vseg[vseg_id].pbase >> 12);
408
409	npages = vseg[vseg_id].length >> 12;
410	if ((vseg[vseg_id].length & 0xFFF) != 0) npages++;
411
412	flags = PTE_V;
413	if (vseg[vseg_id].mode & C_MODE_MASK) flags = flags \| PTE_C;
414	if (vseg[vseg_id].mode & X_MODE_MASK) flags = flags \| PTE_X;
415	if (vseg[vseg_id].mode & W_MODE_MASK) flags = flags \| PTE_W;
416	if (vseg[vseg_id].mode & U_MODE_MASK) flags = flags \| PTE_U;
417
418	#if BOOT_DEBUG_PT
419	_puts(vseg[vseg_id].name);
420	_puts(" : flags = ");
421	_putx(flags);
422	_puts(" / npages = ");
423	_putd(npages);
424	_puts(" / pbase = ");
425	_putl(vseg[vseg_id].pbase);
426	_puts("\n");
427	#endif
428	// loop on 4K pages
429	for (page_id = 0; page_id < npages; page_id++)
430	{
431	boot_add_pte(vspace_id, vpn, flags, ppn, verbose);
432	vpn++;
433	ppn++;
434	}
435	}
436
437	// global segments
438	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
439	{
440	vpn = vseg[vseg_id].vbase >> 12;
441	ppn = (unsigned int)(vseg[vseg_id].pbase >> 12);
442	npages = vseg[vseg_id].length >> 12;
443	if ((vseg[vseg_id].length & 0xFFF) != 0) npages++;
444
445	flags = PTE_V;
446	if (vseg[vseg_id].mode & C_MODE_MASK) flags = flags \| PTE_C;
447	if (vseg[vseg_id].mode & X_MODE_MASK) flags = flags \| PTE_X;
448	if (vseg[vseg_id].mode & W_MODE_MASK) flags = flags \| PTE_W;
449	if (vseg[vseg_id].mode & U_MODE_MASK) flags = flags \| PTE_U;
450
451	#if BOOT_DEBUG_PT
452	_puts(vseg[vseg_id].name);
453	_puts(" : flags = ");
454	_putx(flags);
455	_puts(" / npages = ");
456	_putd(npages);
457	_puts(" / pbase = ");
458	_putl(vseg[vseg_id].pbase);
459	_puts("\n");
460	#endif
461	// loop on 4K pages
462	for (page_id = 0; page_id < npages; page_id++)
463	{
464	boot_add_pte(vspace_id, vpn, flags, ppn, verbose);
465	vpn++;
466	ppn++;
467	}
468	}
469	} // end boot_vspace_pt_build()
470
471
472	///////////////////////////////////////////////////////////////////////////
473	// Align the value of paddr or vaddr to the required alignement,
474	// defined by alignPow2 == L2(alignement).
475	///////////////////////////////////////////////////////////////////////////
476	paddr_t paddr_align_to(paddr_t paddr, unsigned int alignPow2)
477	{
478	paddr_t mask = (1 << alignPow2) - 1;
479	return ((paddr + mask) & ~mask);
480	}
481
482	unsigned int vaddr_align_to(unsigned int vaddr, unsigned int alignPow2)
483	{
484	unsigned int mask = (1 << alignPow2) - 1;
485	return ((vaddr + mask) & ~mask);
486	}
487
488	///////////////////////////////////////////////////////////////////////////
489	// Set pbase for a vseg when identity mapping is required.
490	// The length of the vseg must be known.
491	// The ordered linked list of vsegs mapped on pseg must be updated,
492	// and overlap with previously mapped vsegs must be checked.
493	///////////////////////////////////////////////////////////////////////////
494	void boot_vseg_set_paddr_ident(mapping_vseg_t * vseg)
495	{
496	// checking vseg not already mapped
497	if (vseg->mapped != 0)
498	{
499	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
500	_puts( vseg->name );
501	_puts(" already mapped\n");
502	_exit();
503	}
504
505	// computes selected pseg pointer
506	mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid );
507
508	// computes vseg alignment constraint
509	mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base;
510	mapping_vobj_t* vobj_base = _get_vobj_base( header );
511	unsigned int align = vobj_base[vseg->vobj_offset].align;
512	if ( vobj_base[vseg->vobj_offset].align < 12 ) align = 12;
513
514	// computes required_pbase for identity mapping,
515	paddr_t required_pbase = (paddr_t)vseg->vbase;
516
517	// checks identity constraint against alignment constraint
518	if ( paddr_align_to( required_pbase, align) != required_pbase )
519	{
520	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
521	_puts( vseg->name );
522	_puts(" has uncompatible identity and alignment constraints\n");
523	_exit();
524	}
525
526	// We are looking for a contiguous space in target pseg.
527	// If there is vsegs already mapped, we scan the vsegs list to:
528	// - check overlap with already mapped vsegs,
529	// - try mapping in holes between already mapped vsegs,
530	// - update the ordered linked list if success
531	// We don't enter the loop if no vsegs is already mapped.
532	// implementation note: The next_vseg field is unsigned int,
533	// but we use it to store a MIP32 pointer on a vseg...
534
535	mapping_vseg_t* curr = 0;
536	mapping_vseg_t* prev = 0;
537	unsigned int min_pbase = pseg->base;
538
539	for ( curr = (mapping_vseg_t*)pseg->next_vseg ;
540	(curr != 0) && (vseg->mapped == 0) ;
541	curr = (mapping_vseg_t*)curr->next_vseg )
542	{
543	// looking before current vseg
544	if( (required_pbase >= min_pbase) &&
545	(curr->pbase >= (required_pbase + vseg->length)) ) // space found
546	{
547	vseg->pbase = required_pbase;
548	vseg->mapped = 1;
549
550	// update linked list
551	vseg->next_vseg = (unsigned int)curr;
552	if( curr == (mapping_vseg_t*)pseg->next_vseg )
553	pseg->next_vseg = (unsigned int)vseg;
554	else
555	prev->next_vseg = (unsigned int)vseg;
556	}
557	else // looking in space after curr
558	{
559	prev = curr;
560	min_pbase = curr->pbase + curr->length;
561	}
562	}
563
564	// no success in the loop
565	if( (vseg->mapped == 0) &&
566	(required_pbase >= min_pbase) &&
567	((required_pbase + vseg->length) <= (pseg->base + pseg->length)) )
568	{
569	vseg->pbase = required_pbase;
570	vseg->mapped = 1;
571
572	// update linked list
573	vseg->next_vseg = 0;
574	if ((curr == 0) && (prev == 0)) pseg->next_vseg = (unsigned int)vseg;
575	else prev->next_vseg = (unsigned int)vseg;
576	}
577
578	if( vseg->mapped == 0 )
579	{
580	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr_ident() : vseg ");
581	_puts( vseg->name );
582	_puts(" cannot be mapped on pseg ");
583	_puts( pseg->name );
584	_puts("\n");
585	_exit();
586	}
587	} // end boot_vseg_set_paddr_ident()
588
589
590	////////////////////////////////////////////////////////////////////////////
591	// Set pbase for a vseg when there is no identity mapping constraint.
592	// This is the physical memory allocator (written by Q.Meunier).
593	// The length of the vseg must be known.
594	// All identity mapping vsegs must be already mapped.
595	// We use a linked list of already mapped vsegs, ordered by incresing pbase.
596	// We try to place the vseg in the "first fit" hole in this list.
597	////////////////////////////////////////////////////////////////////////////
598	void boot_vseg_set_paddr(mapping_vseg_t * vseg)
599	{
600	// checking vseg not already mapped
601	if ( vseg->mapped != 0 )
602	{
603	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr() : vseg ");
604	_puts( vseg->name );
605	_puts(" already mapped\n");
606	_exit();
607	}
608
609	// computes selected pseg pointer
610	mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid );
611
612	// computes vseg alignment constraint
613	mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base;
614	mapping_vobj_t* vobj_base = _get_vobj_base( header );
615	unsigned int align = vobj_base[vseg->vobj_offset].align;
616	if ( vobj_base[vseg->vobj_offset].align < 12 ) align = 12;
617
618	// initialise physical base address, with alignment constraint
619	paddr_t possible_pbase = paddr_align_to( pseg->base, align );
620
621	// We are looking for a contiguous space in target pseg
622	// If there is vsegs already mapped, we scan the vsegs list to:
623	// - try mapping in holes between already mapped vsegs,
624	// - update the ordered linked list if success
625	// We don't enter the loop if no vsegs is already mapped.
626	// implementation note: The next_vseg field is unsigned int,
627	// but we use it to store a MIP32 pointer on a vseg...
628
629	mapping_vseg_t* curr = 0;
630	mapping_vseg_t* prev = 0;
631
632	for( curr = (mapping_vseg_t*)pseg->next_vseg ;
633	(curr != 0) && (vseg->mapped == 0) ;
634	curr = (mapping_vseg_t*)curr->next_vseg )
635	{
636	// looking for space before current vseg
637	if ( (curr->pbase >= possible_pbase + vseg->length) ) // space before curr
638	{
639	vseg->pbase = possible_pbase;
640	vseg->mapped = 1;
641
642	// update linked list
643	vseg->next_vseg = (unsigned int)curr;
644	if( curr == (mapping_vseg_t*)pseg->next_vseg )
645	pseg->next_vseg = (unsigned int)vseg;
646	else
647	prev->next_vseg = (unsigned int)vseg;
648	}
649	else // looking for space after curr
650	{
651	possible_pbase = paddr_align_to( curr->pbase + curr->length, align );
652	prev = curr;
653	}
654	}
655
656	// when no space found, try to allocate space after already mapped vsegs
657	if( (vseg->mapped == 0) &&
658	((possible_pbase + vseg->length) <= (pseg->base + pseg->length)) )
659	{
660	vseg->pbase = possible_pbase;
661	vseg->mapped = 1;
662
663	// update linked list
664	vseg->next_vseg = 0;
665	if ((curr == 0 ) && (prev == 0)) pseg->next_vseg = (unsigned int)vseg;
666	else prev->next_vseg = (unsigned int)vseg;
667	}
668
669	if( vseg->mapped == 0 )
670	{
671	_puts("\n[BOOT ERROR] in boot_vseg_set_paddr() : vseg ");
672	_puts( vseg->name );
673	_puts(" cannot be mapped on pseg ");
674	_puts( pseg->name );
675	_puts("\n");
676	_exit();
677	}
678	} // end boot_vseg_set_paddr()
679
680	///////////////////////////////////////////////////////////////////////////
681	// This function computes the physical base address for a vseg
682	// as specified in the mapping info data structure.
683	// It updates the pbase and the length fields of the vseg.
684	// It updates the pbase and vbase fields of all vobjs in the vseg.
685	// It updates the _ptabs_paddr[] and _ptabs_vaddr[] arrays.
686	// It is a global vseg if vspace_id = (-1).
687	///////////////////////////////////////////////////////////////////////////
688	void boot_vseg_map(mapping_vseg_t * vseg, unsigned int vspace_id)
689	{
690	unsigned int vobj_id;
691	unsigned int cur_vaddr;
692	paddr_t cur_paddr;
693	paddr_t cur_length;
694	unsigned int offset;
695
696	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
697	mapping_vobj_t * vobj = _get_vobj_base(header);
698
699	// loop on the vobjs contained in vseg to compute
700	// the vseg length, required for mapping.
701	cur_length = 0;
702	for ( vobj_id = vseg->vobj_offset;
703	vobj_id < (vseg->vobj_offset + vseg->vobjs);
704	vobj_id++ )
705	{
706	if (vobj[vobj_id].align)
707	{
708	cur_length = vaddr_align_to(cur_length, vobj[vobj_id].align);
709	}
710	cur_length += vobj[vobj_id].length;
711	}
712	vseg->length = paddr_align_to(cur_length, 12);
713
714	// mapping: computes vseg pbase address
715	if (vseg->ident != 0) // identity mapping
716	{
717	boot_vseg_set_paddr_ident( vseg );
718	}
719	else // unconstrained mapping
720	{
721	boot_vseg_set_paddr( vseg );
722	}
723
724	// second loop on vobjs contained in vseg to :
725	// initialize the vaddr and paddr fields of all vobjs,
726	// and initialize the page table pointers arrays
727
728	cur_vaddr = vseg->vbase;
729	cur_paddr = vseg->pbase;
730
731	for (vobj_id = vseg->vobj_offset;
732	vobj_id < (vseg->vobj_offset + vseg->vobjs); vobj_id++)
733	{
734	if (vobj[vobj_id].align)
735	{
736	cur_paddr = paddr_align_to(cur_paddr, vobj[vobj_id].align);
737	cur_vaddr = vaddr_align_to(cur_vaddr, vobj[vobj_id].align);
738	}
739	// set vaddr/paddr for current vobj
740	vobj[vobj_id].vaddr = cur_vaddr;
741	vobj[vobj_id].paddr = cur_paddr;
742
743	// initialize _ptabs_vaddr[] & boot_ptabs-paddr[] if PTAB
744	if (vobj[vobj_id].type == VOBJ_TYPE_PTAB)
745	{
746	if (vspace_id == ((unsigned int) -1)) // global vseg
747	{
748	_puts("\n[BOOT ERROR] in boot_vseg_map() function: ");
749	_puts("a PTAB vobj cannot be global");
750	_exit();
751	}
752	// we need at least one PT2
753	if (vobj[vobj_id].length < (PT1_SIZE + PT2_SIZE))
754	{
755	_puts("\n[BOOT ERROR] in boot_vseg_map() function, ");
756	_puts("PTAB too small, minumum size is: ");
757	_putx(PT1_SIZE + PT2_SIZE);
758	_exit();
759	}
760	// register both physical and virtual page table address
761	_ptabs_vaddr[vspace_id] = vobj[vobj_id].vaddr;
762	_ptabs_paddr[vspace_id] = vobj[vobj_id].paddr;
763
764	// reset all valid bits in PT1
765	for ( offset = 0 ; offset < 8192 ; offset = offset + 4)
766	{
767	_physical_write(cur_paddr + offset, 0);
768	}
769
770	// computing the number of second level pages
771	_max_pt2[vspace_id] = (vobj[vobj_id].length - PT1_SIZE) / PT2_SIZE;
772	}
773
774	// set next vaddr/paddr
775	cur_vaddr = cur_vaddr + vobj[vobj_id].length;
776	cur_paddr = cur_paddr + vobj[vobj_id].length;
777	} // end for vobjs
778
779	} // end boot_vseg_map()
780
781	/////////////////////////////////////////////////////////////////////
782	// This function builds the page tables for all virtual spaces
783	// defined in the mapping_info data structure, in three steps:
784	// - step 1 : It computes the physical base address for global vsegs
785	// and for all associated vobjs.
786	// - step 2 : It computes the physical base address for all private
787	// vsegs and all vobjs in each virtual space.
788	// - step 3 : It actually fill the page table for each vspace.
789	//
790	// Note: It must exist at least one vspace in the mapping_info...
791	/////////////////////////////////////////////////////////////////////
792	void boot_pt_init()
793	{
794	mapping_header_t * header = (mapping_header_t *) &seg_boot_mapping_base;
795	mapping_vspace_t * vspace = _get_vspace_base(header);
796	mapping_vseg_t * vseg = _get_vseg_base(header);
797
798	unsigned int vspace_id;
799	unsigned int vseg_id;
800
801	if (header->vspaces == 0 )
802	{
803	_puts("\n[BOOT ERROR] in boot_pt_init() : mapping ");
804	_puts( header->name );
805	_puts(" contains no vspace\n");
806	_exit();
807	}
808
809	#if BOOT_DEBUG_PT
810	_puts("\n[BOOT DEBUG] **** mapping global vsegs ****\n");
811	#endif
812
813	// step 1 : loop on global vsegs
814
815	// vsegs with identity mapping constraint first
816	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
817	{
818	if (vseg[vseg_id].ident == 1)
819	boot_vseg_map(&vseg[vseg_id], ((unsigned int) (-1)));
820	}
821
822	// unconstrained vsegs second
823	for (vseg_id = 0; vseg_id < header->globals; vseg_id++)
824	{
825	if (vseg[vseg_id].ident == 0)
826	boot_vseg_map(&vseg[vseg_id], ((unsigned int) (-1)));
827	}
828
829	// step 2 : loop on virtual vspaces to map private vsegs
830	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
831	{
832
833	#if BOOT_DEBUG_PT
834	_puts("\n[BOOT DEBUG] ****** mapping private vsegs in vspace ");
835	_puts(vspace[vspace_id].name);
836	_puts(" ******\n");
837	#endif
838
839	// vsegs with identity mapping constraint first
840	for (vseg_id = vspace[vspace_id].vseg_offset;
841	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
842	vseg_id++)
843	{
844	if (vseg[vseg_id].ident == 1)
845	boot_vseg_map(&vseg[vseg_id], vspace_id);
846	}
847	// unconstrained vsegs second
848	for (vseg_id = vspace[vspace_id].vseg_offset;
849	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
850	vseg_id++)
851	{
852	if (vseg[vseg_id].ident == 0)
853	boot_vseg_map(&vseg[vseg_id], vspace_id);
854	}
855	}
856
857	#if BOOT_DEBUG_PT
858	mapping_vseg_t* curr;
859	mapping_pseg_t* pseg = _get_pseg_base(header);
860	unsigned int pseg_id;
861	for( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ )
862	{
863	_puts("\n[BOOT DEBUG] ****** vsegs mapped on pseg ");
864	_puts( pseg[pseg_id].name );
865	_putd( pseg[pseg_id].clusterid);
866	_puts(" ******\n");
867	for( curr = (mapping_vseg_t*)pseg[pseg_id].next_vseg ;
868	curr != 0 ;
869	curr = (mapping_vseg_t*)curr->next_vseg )
870	{
871	_puts(" - vseg ");
872	_puts( curr->name );
873	_puts(" : len = ");
874	_putx( curr->length );
875	_puts(" / vbase ");
876	_putl( curr->vbase );
877	_puts(" / pbase ");
878	_putl( curr->pbase );
879	_puts("\n");
880	}
881	}
882	#endif
883
884	// step 3 : loop on the vspaces to build the page tables
885	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
886	{
887
888	#if BOOT_DEBUG_PT
889	_puts("\n[BOOT DEBUG] ****** building page table for vspace ");
890	_puts(vspace[vspace_id].name);
891	_puts(" ******\n");
892	#endif
893
894	boot_vspace_pt_build(vspace_id);
895
896	_puts("\n[BOOT] Page Table for vspace ");
897	_puts( vspace[vspace_id].name );
898	_puts(" completed at cycle ");
899	_putd( _get_proctime() );
900	_puts("\n");
901
902	#if BOOT_DEBUG_PT
903	_puts(" vaddr = ");
904	_putx( _ptabs_vaddr[vspace_id] );
905	_puts(" / paddr = ");
906	_putl( _ptabs_paddr[vspace_id] );
907	_puts(" / PT2 number = ");
908	_putd( _max_pt2[vspace_id] );
909	_puts("\n");
910	#endif
911	}
912	} // end boot_pt_init()
913
914	///////////////////////////////////////////////////////////////////////////////
915	// This function initializes all private vobjs defined in the vspaces,
916	// such as mwmr channels, barriers and locks, because these vobjs
917	// are not known, and not initialized by the compiler.
918	// The MMU is supposed to be activated...
919	///////////////////////////////////////////////////////////////////////////////
920	void boot_vobjs_init()
921	{
922	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
923	mapping_vspace_t* vspace = _get_vspace_base(header);
924	mapping_vobj_t* vobj = _get_vobj_base(header);
925
926	unsigned int vspace_id;
927	unsigned int vobj_id;
928
929	// loop on the vspaces
930	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
931	{
932
933	#if BOOT_DEBUG_VOBJS
934	_puts("\n[BOOT DEBUG] ****** vobjs initialisation in vspace ");
935	_puts(vspace[vspace_id].name);
936	_puts(" ******\n");
937	#endif
938
939	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id] >> 13) );
940
941	unsigned int ptab_found = 0;
942
943	// loop on the vobjs
944	for (vobj_id = vspace[vspace_id].vobj_offset;
945	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
946	vobj_id++)
947	{
948	switch (vobj[vobj_id].type)
949	{
950	case VOBJ_TYPE_MWMR: // storage capacity is (vobj.length/4 - 5) words
951	{
952	mwmr_channel_t* mwmr = (mwmr_channel_t *) (vobj[vobj_id].vaddr);
953	mwmr->ptw = 0;
954	mwmr->ptr = 0;
955	mwmr->sts = 0;
956	mwmr->width = vobj[vobj_id].init;
957	mwmr->depth = (vobj[vobj_id].length >> 2) - 6;
958	mwmr->lock = 0;
959	#if BOOT_DEBUG_VOBJS
960	_puts("MWMR : ");
961	_puts(vobj[vobj_id].name);
962	_puts(" / depth = ");
963	_putd(mwmr->depth);
964	_puts(" / width = ");
965	_putd(mwmr->width);
966	_puts("\n");
967	#endif
968	break;
969	}
970	case VOBJ_TYPE_ELF: // initialisation done by the loader
971	{
972	#if BOOT_DEBUG_VOBJS
973	_puts("ELF : ");
974	_puts(vobj[vobj_id].name);
975	_puts(" / length = ");
976	_putx(vobj[vobj_id].length);
977	_puts("\n");
978	#endif
979	break;
980	}
981	case VOBJ_TYPE_BLOB: // initialisation done by the loader
982	{
983	#if BOOT_DEBUG_VOBJS
984	_puts("BLOB : ");
985	_puts(vobj[vobj_id].name);
986	_puts(" / length = ");
987	_putx(vobj[vobj_id].length);
988	_puts("\n");
989	#endif
990	break;
991	}
992	case VOBJ_TYPE_BARRIER: // init is the number of participants
993	{
994	giet_barrier_t* barrier = (giet_barrier_t *) (vobj[vobj_id].vaddr);
995	barrier->count = vobj[vobj_id].init;
996	barrier->init = vobj[vobj_id].init;
997	#if BOOT_DEBUG_VOBJS
998	_puts("BARRIER : ");
999	_puts(vobj[vobj_id].name);
1000	_puts(" / init_value = ");
1001	_putd(barrier->init);
1002	_puts("\n");
1003	#endif
1004	break;
1005	}
1006	case VOBJ_TYPE_LOCK: // init value is "not taken"
1007	{
1008	unsigned int* lock = (unsigned int *) (vobj[vobj_id].vaddr);
1009	*lock = 0;
1010	#if BOOT_DEBUG_VOBJS
1011	_puts("LOCK : ");
1012	_puts(vobj[vobj_id].name);
1013	_puts("\n");
1014	#endif
1015	break;
1016	}
1017	case VOBJ_TYPE_BUFFER: // nothing to initialise
1018	{
1019	#if BOOT_DEBUG_VOBJS
1020	_puts("BUFFER : ");
1021	_puts(vobj[vobj_id].name);
1022	_puts(" / paddr = ");
1023	_putl(vobj[vobj_id].paddr);
1024	_puts(" / length = ");
1025	_putx(vobj[vobj_id].length);
1026	_puts("\n");
1027	#endif
1028	break;
1029	}
1030	case VOBJ_TYPE_MEMSPACE:
1031	{
1032	giet_memspace_t* memspace = (giet_memspace_t *) vobj[vobj_id].vaddr;
1033	memspace->buffer = (void *) vobj[vobj_id].vaddr + 8;
1034	memspace->size = vobj[vobj_id].length - 8;
1035	#if BOOT_DEBUG_VOBJS
1036	_puts("MEMSPACE : ");
1037	_puts(vobj[vobj_id].name);
1038	_puts(" / vaddr = ");
1039	_putx(vobj[vobj_id].vaddr);
1040	_puts(" / length = ");
1041	_putx(vobj[vobj_id].length);
1042	_puts(" / buffer = ");
1043	_putx((unsigned int)memspace->buffer);
1044	_puts(" / size = ");
1045	_putx(memspace->size);
1046	_puts("\n");
1047	#endif
1048	break;
1049	}
1050	case VOBJ_TYPE_PTAB: // nothing to initialize
1051	{
1052	ptab_found = 1;
1053	#if BOOT_DEBUG_VOBJS
1054	_puts("PTAB : ");
1055	_puts(vobj[vobj_id].name);
1056	_puts(" / length = ");
1057	_putx(vobj[vobj_id].length);
1058	_puts("\n");
1059	#endif
1060	break;
1061	}
1062	case VOBJ_TYPE_CONST:
1063	{
1064	unsigned int* addr = (unsigned int *) vobj[vobj_id].vaddr;
1065	*addr = vobj[vobj_id].init;
1066	#if BOOT_DEBUG_VOBJS
1067	_puts("CONST : ");
1068	_puts(vobj[vobj_id].name);
1069	_puts(" / Paddr :");
1070	_putl(vobj[vobj_id].paddr);
1071	_puts(" / init = ");
1072	_putx(*addr);
1073	_puts("\n");
1074	#endif
1075	break;
1076	}
1077	default:
1078	{
1079	_puts("\n[BOOT ERROR] illegal vobj type: ");
1080	_putd(vobj[vobj_id].type);
1081	_puts("\n");
1082	_exit();
1083	}
1084	} // end switch type
1085	} // end loop on vobjs
1086	if (ptab_found == 0)
1087	{
1088	_puts("\n[BOOT ERROR] Missing PTAB for vspace ");
1089	_putd(vspace_id);
1090	_exit();
1091	}
1092	} // end loop on vspaces
1093
1094	} // end boot_vobjs_init()
1095
1096	///////////////////////////////////////////////////////////////////////////////
1097	// This function returns in the vbase and length buffers the virtual base
1098	// address and the length of the segment allocated to the schedulers array
1099	// in the cluster defined by the clusterid argument.
1100	///////////////////////////////////////////////////////////////////////////////
1101	void boot_get_sched_vaddr( unsigned int cluster_id,
1102	unsigned int* vbase,
1103	unsigned int* length )
1104	{
1105	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
1106	mapping_vobj_t* vobj = _get_vobj_base(header);
1107	mapping_vseg_t* vseg = _get_vseg_base(header);
1108	mapping_pseg_t* pseg = _get_pseg_base(header);
1109
1110	unsigned int vseg_id;
1111	unsigned int found = 0;
1112
1113	for ( vseg_id = 0 ; (vseg_id < header->vsegs) && (found == 0) ; vseg_id++ )
1114	{
1115	if ( (vobj[vseg[vseg_id].vobj_offset].type == VOBJ_TYPE_SCHED) &&
1116	(pseg[vseg[vseg_id].psegid].clusterid == cluster_id ) )
1117	{
1118	*vbase = vseg[vseg_id].vbase;
1119	*length = vobj[vseg[vseg_id].vobj_offset].length;
1120	found = 1;
1121	}
1122	}
1123	if ( found == 0 )
1124	{
1125	mapping_cluster_t* cluster = _get_cluster_base(header);
1126	_puts("\n[BOOT ERROR] No vobj of type SCHED in cluster [");
1127	_putd( cluster[cluster_id].x );
1128	_puts(",");
1129	_putd( cluster[cluster_id].y );
1130	_puts("]\n");
1131	_exit();
1132	}
1133	} // end boot_get_sched_vaddr()
1134
1135	////////////////////////////////////////////////////////////////////////////////////
1136	// This function initialises all processors schedulers.
1137	// This is done by processor 0, and the MMU must be activated.
1138	// - In Step 1, it initialises the _schedulers[gpid] pointers array, and scan
1139	// the processors to initialise the schedulers, including the
1140	// idle_task context (ltid == 14).
1141	// - In Step 2, it scan all tasks in all vspaces to initialise the tasks contexts,
1142	// as specified in the mapping_info data structure.
1143	////////////////////////////////////////////////////////////////////////////////////
1144	void boot_schedulers_init()
1145	{
1146	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
1147	mapping_cluster_t* cluster = _get_cluster_base(header);
1148	mapping_vspace_t* vspace = _get_vspace_base(header);
1149	mapping_task_t* task = _get_task_base(header);
1150	mapping_vobj_t* vobj = _get_vobj_base(header);
1151	mapping_proc_t* proc = _get_proc_base(header);
1152	mapping_irq_t* irq = _get_irq_base(header);
1153
1154	unsigned int cluster_id; // cluster index in mapping_info
1155	unsigned int proc_id; // processor index in mapping_info
1156	unsigned int irq_id; // irq index in mapping_info
1157	unsigned int vspace_id; // vspace index in mapping_info
1158	unsigned int task_id; // task index in mapping_info
1159
1160	// TTY, NIC, CMA, HBA, TIM and DMA channels allocators
1161	// - TTY[0] is reserved for the kernel
1162	// - In all clusters the first NB_PROCS_MAX timers
1163	// are reserved for the kernel (context switch)
1164
1165	unsigned int alloc_tty_channel = 0; // TTY channel allocator
1166	unsigned int alloc_nic_channel = 0; // NIC channel allocator
1167	unsigned int alloc_cma_channel = 0; // CMA channel allocator
1168	unsigned int alloc_hba_channel = 0; // IOC channel allocator
1169	unsigned int alloc_tim_channel[X_SIZE*Y_SIZE]; // user TIMER allocators
1170
1171	if (NB_TTY_CHANNELS > 1) alloc_tty_channel++;
1172
1173	/////////////////////////////////////////////////////////////////////////
1174	// Step 1 : loop on the clusters and on the processors
1175	// to initialize the schedulers[] array of pointers,
1176	// and the interrupt vectors.
1177	// Implementation note:
1178	// We need to use both proc_id to scan the mapping info structure,
1179	// and lpid to access the schedulers array.
1180	// - the _schedulers[] array of pointers can contain "holes", because
1181	// it is indexed by the global pid = cluster_xy*NB_PROCS_MAX + lpid
1182	// - the mapping info array of processors is contiguous, it is indexed
1183	// by proc_id, and use an offset specific in each cluster.
1184
1185	for (cluster_id = 0 ; cluster_id < X_SIZE*Y_SIZE ; cluster_id++)
1186	{
1187	unsigned int x = cluster[cluster_id].x;
1188	unsigned int y = cluster[cluster_id].y;
1189	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1190
1191	#if BOOT_DEBUG_SCHED
1192	_puts("\n[BOOT DEBUG] Initialise schedulers in cluster[");
1193	_putd( x );
1194	_puts(",");
1195	_putd( y );
1196	_puts("]\n");
1197	#endif
1198	alloc_tim_channel[cluster_id] = NB_PROCS_MAX;
1199
1200	unsigned int lpid; // processor local index in cluster
1201	unsigned int sched_vbase; // schedulers segment virtual base address
1202	unsigned int sched_length; // schedulers segment length
1203	unsigned int nprocs; // number of processors in cluster
1204
1205	nprocs = cluster[cluster_id].procs;
1206
1207	// checking processors number
1208	if ( nprocs > NB_PROCS_MAX )
1209	{
1210	_puts("\n[BOOT ERROR] Too much processors in cluster[");
1211	_putd( x );
1212	_puts(",");
1213	_putd( y );
1214	_puts("]\n");
1215	_exit();
1216	}
1217
1218	// get scheduler array virtual base address and length
1219	boot_get_sched_vaddr( cluster_id, &sched_vbase, &sched_length );
1220
1221	// each processor scheduler requires 4 Kbytes
1222	if ( sched_length < (nprocs<<12) )
1223	{
1224	_puts("\n[BOOT ERROR] Schedulers segment too small in cluster[");
1225	_putd( x );
1226	_puts(",");
1227	_putd( y );
1228	_puts("]\n");
1229	_exit();
1230	}
1231
1232	// loop on processors
1233	for ( proc_id = cluster[cluster_id].proc_offset, lpid = 0 ;
1234	proc_id < cluster[cluster_id].proc_offset + cluster[cluster_id].procs;
1235	proc_id++, lpid++ )
1236	{
1237	// current processor scheduler pointer : psched
1238	static_scheduler_t* psched = (static_scheduler_t*)(sched_vbase+(lpid<<12));
1239
1240	// set the schedulers pointers array
1241	_schedulers[cluster_xy * NB_PROCS_MAX + lpid] = psched;
1242
1243	#if BOOT_DEBUG_SCHED
1244	_puts("\nProc_");
1245	_putd( x );
1246	_puts("_");
1247	_putd( y );
1248	_puts("_");
1249	_putd( lpid );
1250	_puts(" : scheduler virtual base address = ");
1251	_putx( sched_vbase + (lpid<<12) );
1252	_puts("\n");
1253	#endif
1254
1255	// initialise the "tasks" variable : default value is 0
1256	psched->tasks = 0;
1257
1258	// initialise the "current" variable : default value is idle_task
1259	psched->current = IDLE_TASK_INDEX;
1260
1261	// initialise interrupt_vector with default value (valid bit = 0)
1262	unsigned int slot;
1263	for (slot = 0; slot < 32; slot++) psched->interrupt_vector[slot] = 0;
1264
1265	// initialise interrupt vector with the IRQs actually allocated
1266	for (irq_id = proc[proc_id].irq_offset;
1267	irq_id < proc[proc_id].irq_offset + proc[proc_id].irqs;
1268	irq_id++)
1269	{
1270	unsigned int type = irq[irq_id].type;
1271	unsigned int icu_id = irq[irq_id].icuid;
1272	unsigned int isr_id = irq[irq_id].isr;
1273	unsigned int channel = irq[irq_id].channel;
1274
1275	unsigned int value = ((isr_id & 0xFF) ) \|
1276	((type & 0xFF) << 8) \|
1277	((channel & 0x7FFF) << 16) \|
1278	0x80000000; // Valid entry
1279
1280	psched->interrupt_vector[icu_id] = value;
1281
1282	#if BOOT_DEBUG_SCHED
1283	_puts("- IRQ : icu = ");
1284	_putd(icu_id);
1285	_puts(" / type = ");
1286	_putd(type);
1287	_puts(" / isr = ");
1288	_putd(isr_id);
1289	_puts(" / channel = ");
1290	_putd(channel);
1291	_puts(" => vector_entry = ");
1292	_putx( value );
1293	_puts("\n");
1294	#endif
1295	}
1296
1297	// initializes the idle_task context in scheduler:
1298	// - the SR slot is 0xFF03 because this task run in kernel mode.
1299	// - it uses the page table of vspace[0]
1300	// - it uses the kernel TTY terminal
1301	// - slots containing addresses (SP, RA, EPC, PTAB, PTPR)
1302	// must be re-initialised by kernel_parallel_init()
1303
1304	psched->context[IDLE_TASK_INDEX][CTX_SR_ID] = 0xFF03;
1305	psched->context[IDLE_TASK_INDEX][CTX_PTPR_ID] = _ptabs_paddr[0]>>13;
1306	psched->context[IDLE_TASK_INDEX][CTX_PTAB_ID] = _ptabs_vaddr[0];
1307	psched->context[IDLE_TASK_INDEX][CTX_TTY_ID] = 0;
1308	psched->context[IDLE_TASK_INDEX][CTX_LTID_ID] = IDLE_TASK_INDEX;
1309	psched->context[IDLE_TASK_INDEX][CTX_VSID_ID] = 0;
1310	psched->context[IDLE_TASK_INDEX][CTX_RUN_ID] = 1;
1311
1312	} // end for procs
1313	} // end for clusters
1314
1315	///////////////////////////////////////////////////////////////////
1316	// Step 2 : loop on the vspaces and the tasks
1317	// to initialise the schedulers and the task contexts.
1318
1319	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1320	{
1321	// We must set the PTPR depending on the vspace, because the start_vector
1322	// and the stack address are defined in virtual space.
1323	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id] >> 13) );
1324
1325	// loop on the tasks in vspace (task_id is the global index)
1326	for (task_id = vspace[vspace_id].task_offset;
1327	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
1328	task_id++)
1329	{
1330
1331	// compute the cluster coordinates
1332	unsigned int x = cluster[task[task_id].clusterid].x;
1333	unsigned int y = cluster[task[task_id].clusterid].y;
1334	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1335
1336	#if BOOT_DEBUG_SCHED
1337	_puts("\n[BOOT DEBUG] Initialise context for task ");
1338	_puts( task[task_id].name );
1339	_puts(" in vspace ");
1340	_puts( vspace[vspace_id].name );
1341	_puts(" running on cluster[");
1342	_putd( x );
1343	_puts(",");
1344	_putd( y );
1345	_puts("]\n");
1346	#endif
1347	// compute gpid (global processor index) and scheduler base address
1348	unsigned int gpid = cluster_xy * NB_PROCS_MAX + task[task_id].proclocid;
1349	static_scheduler_t* psched = _schedulers[gpid];
1350
1351	// ctx_sr : value required before an eret instruction
1352	unsigned int ctx_sr = 0x0000FF13;
1353
1354	// ctx_ptpr : page table physical base address (shifted by 13 bit)
1355	unsigned int ctx_ptpr = (unsigned int)(_ptabs_paddr[vspace_id] >> 13);
1356
1357	// ctx_ptab : page_table virtual base address
1358	unsigned int ctx_ptab = _ptabs_vaddr[vspace_id];
1359
1360	// ctx_tty : TTY terminal global index provided by the global allocator
1361	unsigned int ctx_tty = 0xFFFFFFFF;
1362	if (task[task_id].use_tty)
1363	{
1364	if (alloc_tty_channel >= NB_TTY_CHANNELS)
1365	{
1366	_puts("\n[BOOT ERROR] TTY index too large for task ");
1367	_puts(task[task_id].name);
1368	_puts(" in vspace ");
1369	_puts(vspace[vspace_id].name);
1370	_puts("\n");
1371	_exit();
1372	}
1373	ctx_tty = alloc_tty_channel;
1374	if (NB_TTY_CHANNELS > 1) alloc_tty_channel++;
1375	}
1376	// ctx_nic : NIC channel global index provided by the global allocator
1377	unsigned int ctx_nic = 0xFFFFFFFF;
1378	if (task[task_id].use_nic)
1379	{
1380	if (alloc_nic_channel >= NB_NIC_CHANNELS)
1381	{
1382	_puts("\n[BOOT ERROR] NIC channel index too large for task ");
1383	_puts(task[task_id].name);
1384	_puts(" in vspace ");
1385	_puts(vspace[vspace_id].name);
1386	_puts("\n");
1387	_exit();
1388	}
1389	ctx_nic = alloc_nic_channel;
1390	alloc_nic_channel++;
1391	}
1392	// ctx_cma : CMA channel global index provided by the global allocator
1393	unsigned int ctx_cma = 0xFFFFFFFF;
1394	if (task[task_id].use_cma)
1395	{
1396	if (alloc_cma_channel >= NB_CMA_CHANNELS)
1397	{
1398	_puts("\n[BOOT ERROR] CMA channel index too large for task ");
1399	_puts(task[task_id].name);
1400	_puts(" in vspace ");
1401	_puts(vspace[vspace_id].name);
1402	_puts("\n");
1403	_exit();
1404	}
1405	ctx_cma = alloc_cma_channel;
1406	alloc_cma_channel++;
1407	}
1408	// ctx_hba : HBA channel global index provided by the global allocator
1409	unsigned int ctx_hba = 0xFFFFFFFF;
1410	if (task[task_id].use_hba)
1411	{
1412	if (alloc_hba_channel >= NB_HBA_CHANNELS)
1413	{
1414	_puts("\n[BOOT ERROR] IOC channel index too large for task ");
1415	_puts(task[task_id].name);
1416	_puts(" in vspace ");
1417	_puts(vspace[vspace_id].name);
1418	_puts("\n");
1419	_exit();
1420	}
1421	ctx_hba = alloc_hba_channel;
1422	alloc_hba_channel++;
1423	}
1424	// ctx_tim : TIM local channel index provided by the cluster allocator
1425	unsigned int ctx_tim = 0xFFFFFFFF;
1426	if (task[task_id].use_tim)
1427	{
1428	unsigned int cluster_id = task[task_id].clusterid;
1429
1430	if ( alloc_tim_channel[cluster_id] >= NB_TIM_CHANNELS )
1431	{
1432	_puts("\n[BOOT ERROR] local TIMER index too large for task ");
1433	_puts(task[task_id].name);
1434	_puts(" in vspace ");
1435	_puts(vspace[vspace_id].name);
1436	_puts("\n");
1437	_exit();
1438	}
1439
1440	// checking that there is an ISR_TIMER installed
1441	unsigned int found = 0;
1442	for ( irq_id = 0 ; irq_id < 32 ; irq_id++ )
1443	{
1444	unsigned int entry = psched->interrupt_vector[irq_id];
1445	unsigned int isr = entry & 0x000000FF;
1446	unsigned int channel = entry>>16;
1447	if ( (isr == ISR_TIMER) && (channel == alloc_tim_channel[cluster_id]) )
1448	{
1449	found = 1;
1450	ctx_tim = alloc_tim_channel[cluster_id];
1451	alloc_tim_channel[cluster_id]++;
1452	break;
1453	}
1454	}
1455	if (!found)
1456	{
1457	_puts("\n[BOOT ERROR] No ISR_TIMER installed for task ");
1458	_puts(task[task_id].name);
1459	_puts(" in vspace ");
1460	_puts(vspace[vspace_id].name);
1461	_puts("\n");
1462	_exit();
1463	}
1464	}
1465	// ctx_epc : Get the virtual address of the memory location containing
1466	// the task entry point : the start_vector is stored by GCC in the seg_data
1467	// segment and we must wait the .elf loading to get the entry point value...
1468	mapping_vobj_t* pvobj = &vobj[vspace[vspace_id].vobj_offset +
1469	vspace[vspace_id].start_offset];
1470	unsigned int ctx_epc = pvobj->vaddr + (task[task_id].startid)*4;
1471
1472	// ctx_sp : Get the vobj containing the stack
1473	unsigned int vobj_id = task[task_id].stack_vobjid + vspace[vspace_id].vobj_offset;
1474	unsigned int ctx_sp = vobj[vobj_id].vaddr + vobj[vobj_id].length;
1475
1476	// get local task index in scheduler
1477	unsigned int ltid = psched->tasks;
1478
1479	// get vspace thread index
1480	unsigned int thread_id = task[task_id].trdid;
1481
1482	if (ltid >= IDLE_TASK_INDEX)
1483	{
1484	_puts("\n[BOOT ERROR] in boot_schedulers_init() : ");
1485	_putd( ltid );
1486	_puts(" tasks allocated to processor ");
1487	_putd( gpid );
1488	_puts(" / max is ");
1489	_putd( IDLE_TASK_INDEX );
1490	_puts("\n");
1491	_exit();
1492	}
1493
1494	// update the "tasks" and "current" fields in scheduler:
1495	// the first task to execute is task 0 as soon as there is at least
1496	// one task allocated to processor.
1497	psched->tasks = ltid + 1;
1498	psched->current = 0;
1499
1500	// initializes the task context in scheduler
1501	psched->context[ltid][CTX_SR_ID] = ctx_sr;
1502	psched->context[ltid][CTX_SP_ID] = ctx_sp;
1503	psched->context[ltid][CTX_EPC_ID] = ctx_epc;
1504	psched->context[ltid][CTX_PTPR_ID] = ctx_ptpr;
1505	psched->context[ltid][CTX_TTY_ID] = ctx_tty;
1506	psched->context[ltid][CTX_CMA_ID] = ctx_cma;
1507	psched->context[ltid][CTX_HBA_ID] = ctx_hba;
1508	psched->context[ltid][CTX_NIC_ID] = ctx_nic;
1509	psched->context[ltid][CTX_TIM_ID] = ctx_tim;
1510	psched->context[ltid][CTX_PTAB_ID] = ctx_ptab;
1511	psched->context[ltid][CTX_LTID_ID] = ltid;
1512	psched->context[ltid][CTX_GTID_ID] = task_id;
1513	psched->context[ltid][CTX_TRDID_ID] = thread_id;
1514	psched->context[ltid][CTX_VSID_ID] = vspace_id;
1515	psched->context[ltid][CTX_RUN_ID] = 1;
1516
1517	#if BOOT_DEBUG_SCHED
1518	_puts("\nTask ");
1519	_putd( task_id );
1520	_puts(" allocated to processor ");
1521	_putd( gpid );
1522	_puts("\n - ctx[LTID] = ");
1523	_putd( psched->context[ltid][CTX_LTID_ID] );
1524	_puts("\n - ctx[SR] = ");
1525	_putx( psched->context[ltid][CTX_SR_ID] );
1526	_puts("\n - ctx[SP] = ");
1527	_putx( psched->context[ltid][CTX_SP_ID] );
1528	_puts("\n - ctx[EPC] = ");
1529	_putx( psched->context[ltid][CTX_EPC_ID] );
1530	_puts("\n - ctx[PTPR] = ");
1531	_putx( psched->context[ltid][CTX_PTPR_ID] );
1532	_puts("\n - ctx[TTY] = ");
1533	_putd( psched->context[ltid][CTX_TTY_ID] );
1534	_puts("\n - ctx[NIC] = ");
1535	_putd( psched->context[ltid][CTX_NIC_ID] );
1536	_puts("\n - ctx[CMA] = ");
1537	_putd( psched->context[ltid][CTX_CMA_ID] );
1538	_puts("\n - ctx[IOC] = ");
1539	_putd( psched->context[ltid][CTX_HBA_ID] );
1540	_puts("\n - ctx[TIM] = ");
1541	_putd( psched->context[ltid][CTX_TIM_ID] );
1542	_puts("\n - ctx[PTAB] = ");
1543	_putx( psched->context[ltid][CTX_PTAB_ID] );
1544	_puts("\n - ctx[GTID] = ");
1545	_putd( psched->context[ltid][CTX_GTID_ID] );
1546	_puts("\n - ctx[VSID] = ");
1547	_putd( psched->context[ltid][CTX_VSID_ID] );
1548	_puts("\n - ctx[TRDID] = ");
1549	_putd( psched->context[ltid][CTX_TRDID_ID] );
1550	_puts("\n");
1551	#endif
1552
1553	} // end loop on tasks
1554	} // end loop on vspaces
1555	} // end _schedulers_init()
1556
1557	//////////////////////////////////////////////////////////////////////////////////
1558	// This function loads the map.bin file from block device.
1559	// The fat global varible is defined in fat32.c file.
1560	//////////////////////////////////////////////////////////////////////////////////
1561	void boot_mapping_init()
1562	{
1563	_ioc_init( 0 );
1564
1565	int fd_id = _fat_open( IOC_BOOT_PA_MODE,
1566	"map.bin",
1567	0 ); // no creation
1568
1569	if ( fd_id == -1 )
1570	{
1571	_puts("\n[BOOT ERROR] : map.bin file not found \n");
1572	_exit();
1573	}
1574
1575	#if BOOT_DEBUG_MAPPING
1576	_puts("\n[BOOT] map.bin file successfully open at cycle ");
1577	_putd(_get_proctime());
1578	_puts("\n");
1579	#endif
1580
1581	unsigned int size = fat.fd[fd_id].file_size;
1582	unsigned int nblocks = size >> 9;
1583	unsigned int offset = size & 0x1FF;
1584	if ( offset ) nblocks++;
1585
1586	unsigned int ok = _fat_read( IOC_BOOT_PA_MODE,
1587	fd_id,
1588	(unsigned int*)( &seg_boot_mapping_base),
1589	nblocks,
1590	0 ); // offset
1591	if ( ok == -1 )
1592	{
1593	_puts("\n[BOOT ERROR] : unable to load map.bin file \n");
1594	_exit();
1595	}
1596	_fat_close( fd_id );
1597
1598	boot_mapping_check();
1599	} // end boot_mapping_init()
1600
1601
1602	//////////////////////////////////////////////////////////////////////////////////
1603	// This function open the .elf file identified by the "pathname" argument.
1604	// It loads the complete file in a dedicated buffer, it copies all loadable
1605	// segments at the memory virtual address defined in the .elf file,
1606	// and close the file.
1607	// Notes:
1608	// - The processor PTPR should contain the value corresponding to the
1609	// vspace containing the .elf file.
1610	// - As this function requires a temporary memory buffer
1611	// to load the complete .elf file before to copy the various segments
1612	// to te proper location, it uses the seg_boot_buffer defined in map.xml.
1613	//////////////////////////////////////////////////////////////////////////////////
1614	void load_one_elf_file( unsigned int mode,
1615	char* pathname,
1616	unsigned int vspace_id ) // to use the proper page_table
1617	{
1618	unsigned int seg_id;
1619
1620	// get boot buffer address and size
1621	char* boot_buffer = (char*)(&seg_boot_buffer_base);
1622	unsigned int boot_buffer_size = (unsigned int)(&seg_boot_buffer_size);
1623
1624	#if BOOT_DEBUG_ELF
1625	_puts("\n[BOOT DEBUG] Start searching file ");
1626	_puts( pathname );
1627	_puts(" at cycle ");
1628	_putd( _get_proctime() );
1629	_puts("\n");
1630	#endif
1631
1632	// open .elf file
1633	int fd_id = _fat_open( mode,
1634	pathname,
1635	0 ); // no creation
1636	if ( fd_id < 0 )
1637	{
1638	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1639	_puts( pathname );
1640	_puts(" not found\n");
1641	_exit();
1642	}
1643
1644	// check boot_buffer size versus file size
1645	if ( fat.fd[fd_id].file_size > boot_buffer_size )
1646	{
1647	_puts("\n[BOOT ERROR] load_one_elf_file() : ");
1648	_puts( pathname );
1649	_puts(" exceeds the seg_boot_buffer size\n");
1650	_exit();
1651	}
1652
1653	// compute number of sectors
1654	unsigned int nbytes = fat.fd[fd_id].file_size;
1655	unsigned int nsectors = nbytes>>9;
1656	if( nbytes & 0x1FF) nsectors++;
1657
1658	// load file in boot_buffer
1659	if( _fat_read( mode,
1660	fd_id,
1661	boot_buffer,
1662	nsectors,
1663	0 ) != nsectors )
1664	{
1665	_puts("\n[BOOT ERROR] load_one_elf_file() : unexpected EOF for file ");
1666	_puts( pathname );
1667	_puts("\n");
1668	_exit();
1669	}
1670
1671	// Check ELF Magic Number in ELF header
1672	Elf32_Ehdr* elf_header_ptr = (Elf32_Ehdr*)boot_buffer;
1673
1674	if ( (elf_header_ptr->e_ident[EI_MAG0] != ELFMAG0) \|\|
1675	(elf_header_ptr->e_ident[EI_MAG1] != ELFMAG1) \|\|
1676	(elf_header_ptr->e_ident[EI_MAG2] != ELFMAG2) \|\|
1677	(elf_header_ptr->e_ident[EI_MAG3] != ELFMAG3) )
1678	{
1679	_puts("\n[BOOT ERROR] load_elf() : file ");
1680	_puts( pathname );
1681	_puts(" does not use ELF format\n");
1682	_exit();
1683	}
1684
1685	// get program header table pointer
1686	unsigned int pht_index = elf_header_ptr->e_phoff;
1687	if( pht_index == 0 )
1688	{
1689	_puts("\n[BOOT ERROR] load_one_elf_file() : file ");
1690	_puts( pathname );
1691	_puts(" does not contain loadable segment\n");
1692	_exit();
1693	}
1694	Elf32_Phdr* elf_pht_ptr = (Elf32_Phdr*)(boot_buffer + pht_index);
1695
1696	// get number of segments
1697	unsigned int nsegments = elf_header_ptr->e_phnum;
1698
1699	#if BOOT_DEBUG_ELF
1700	_puts("\n[BOOT DEBUG] File ");
1701	_puts( pathname );
1702	_puts(" loaded at cycle ");
1703	_putd( _get_proctime() );
1704	_puts(" / bytes = ");
1705	_putd( nbytes );
1706	_puts(" / sectors = ");
1707	_putd( nsectors );
1708	_puts("\n");
1709	#endif
1710
1711	// Loop on loadable segments in the ELF file
1712	for (seg_id = 0 ; seg_id < nsegments ; seg_id++)
1713	{
1714	if(elf_pht_ptr[seg_id].p_type == PT_LOAD)
1715	{
1716	// Get segment attributes
1717	unsigned int seg_vaddr = elf_pht_ptr[seg_id].p_vaddr;
1718	unsigned int seg_offset = elf_pht_ptr[seg_id].p_offset;
1719	unsigned int seg_filesz = elf_pht_ptr[seg_id].p_filesz;
1720	unsigned int seg_memsz = elf_pht_ptr[seg_id].p_memsz;
1721
1722	if( seg_memsz < seg_filesz )
1723	{
1724	_puts("\n[BOOT ERROR] load_one_elf_file() : segment at vaddr = ");
1725	_putx( seg_vaddr );
1726	_puts(" in file ");
1727	_puts( pathname );
1728	_puts(" has a wrong size \n");
1729	_exit();
1730	}
1731
1732	// fill empty space with 0 as required
1733	if( seg_memsz > seg_filesz )
1734	{
1735	unsigned int i;
1736	for( i = seg_filesz ; i < seg_memsz ; i++ ) boot_buffer[i+seg_offset] = 0;
1737	}
1738
1739	unsigned int src_vaddr = (unsigned int)boot_buffer + seg_offset;
1740
1741	#if BOOT_DEBUG_ELF
1742	_puts(" - segment ");
1743	_putd( seg_id );
1744	_puts(" / dst_vaddr = ");
1745	_putx( seg_vaddr );
1746	_puts(" / src_vaddr = ");
1747	_putx( src_vaddr );
1748	_puts(" / size = ");
1749	_putx( seg_filesz );
1750	_puts("\n");
1751	#endif
1752
1753	// copy the segment from boot buffer to destination buffer
1754	if( NB_DMA_CHANNELS > 0 )
1755	{
1756	_dma_copy( vspace_id, // required for V2P translation
1757	(char*)seg_vaddr,
1758	(char*)src_vaddr,
1759	seg_filesz );
1760	}
1761	else
1762	{
1763	_memcpy( (char*)seg_vaddr,
1764	(char*)src_vaddr,
1765	seg_filesz );
1766	}
1767	}
1768	} // end for segments
1769
1770	// close .elf file
1771	_fat_close( fd_id );
1772
1773	} // end load_one_elf_file()
1774
1775
1776	//////////////////////////////////////////////////////////////////////////////////
1777	// This function uses the map.bin data structure to load the "kernel.elf" file
1778	// as well as the various "application.elf" files.
1779	// The "preloader.elf" file is not loaded, because it has been burned in the ROM.
1780	// The "boot.elf" file is not loaded, because it has been loaded by the preloader.
1781	// It scans all vobjs defined in the map.bin data structure to collect
1782	// all .elf files pathnames, and calls the load_one_elf_file() function to
1783	// load all loadable segments at the virtual address found in the .elf file.
1784	//////////////////////////////////////////////////////////////////////////////////
1785	void boot_elf_load()
1786	{
1787	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
1788	mapping_vspace_t* vspace = _get_vspace_base( header );
1789	mapping_vobj_t* vobj = _get_vobj_base( header );
1790	unsigned int vspace_id;
1791	unsigned int vobj_id;
1792	unsigned int found;
1793
1794	// Scan all vobjs corresponding to global vsegs,
1795	// to find the pathname to the kernel.elf file
1796	found = 0;
1797	for( vobj_id = 0 ; vobj_id < header->globals ; vobj_id++ )
1798	{
1799	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
1800	{
1801	found = 1;
1802	break;
1803	}
1804	}
1805
1806	// We need one kernel.elf file
1807	if (found == 0)
1808	{
1809	_puts("[BOOT ERROR] boot_elf_load() : kernel.elf file not found\n");
1810	_exit();
1811	}
1812
1813	load_one_elf_file( IOC_BOOT_VA_MODE,
1814	vobj[vobj_id].binpath,
1815	0 ); // vspace 0
1816
1817	_puts("\n[BOOT] File ");
1818	_puts( vobj[vobj_id].binpath );
1819	_puts(" loaded at cycle ");
1820	_putd( _get_proctime() );
1821	_puts("\n");
1822
1823	// loop on the vspaces, scanning all vobjs in a vspace,
1824	// to find the pathname of the .elf file associated to the vspace.
1825	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
1826	{
1827	// Set PTPR depending on the vspace, as seg_data is defined in virtual space.
1828	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[vspace_id] >> 13) );
1829
1830	// loop on the vobjs in vspace (vobj_id is the global index)
1831	unsigned int found = 0;
1832	for (vobj_id = vspace[vspace_id].vobj_offset;
1833	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1834	vobj_id++)
1835	{
1836	if(vobj[vobj_id].type == VOBJ_TYPE_ELF)
1837	{
1838	found = 1;
1839	break;
1840	}
1841	}
1842
1843	// We want one .elf file per vspace
1844	if (found == 0)
1845	{
1846	_puts("[BOOT ERROR] boot_elf_load() : .elf file not found for vspace ");
1847	_puts( vspace[vspace_id].name );
1848	_puts("\n");
1849	_exit();
1850	}
1851
1852	load_one_elf_file( IOC_BOOT_VA_MODE,
1853	vobj[vobj_id].binpath,
1854	vspace_id );
1855
1856	_puts("\n[BOOT] File ");
1857	_puts( vobj[vobj_id].binpath );
1858	_puts(" loaded at cycle ");
1859	_putd( _get_proctime() );
1860	_puts("\n");
1861
1862	} // end for vspaces
1863
1864	// restaure vspace 0 PTPR
1865	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0] >> 13) );
1866
1867	} // end boot_elf_load()
1868
1869	////////////////////////////////////////////////////////////////////////////////
1870	// This function intializes the periherals and coprocessors, as specified
1871	// in the mapping_info file.
1872	////////////////////////////////////////////////////////////////////////////////
1873	void boot_peripherals_init()
1874	{
1875	mapping_header_t * header = (mapping_header_t *) & seg_boot_mapping_base;
1876	mapping_cluster_t * cluster = _get_cluster_base(header);
1877	mapping_periph_t * periph = _get_periph_base(header);
1878	mapping_vobj_t * vobj = _get_vobj_base(header);
1879	mapping_vspace_t * vspace = _get_vspace_base(header);
1880	mapping_coproc_t * coproc = _get_coproc_base(header);
1881	mapping_cp_port_t * cp_port = _get_cp_port_base(header);
1882
1883	unsigned int cluster_id;
1884	unsigned int periph_id;
1885	unsigned int coproc_id;
1886	unsigned int cp_port_id;
1887	unsigned int channel_id;
1888
1889	// loop on all physical clusters
1890	for (cluster_id = 0; cluster_id < X_SIZE*Y_SIZE; cluster_id++)
1891	{
1892	// computes cluster coordinates
1893	unsigned int x = cluster[cluster_id].x;
1894	unsigned int y = cluster[cluster_id].y;
1895	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
1896
1897	#if BOOT_DEBUG_PERI
1898	_puts("\n[BOOT DEBUG] ****** peripherals initialisation in cluster[");
1899	_putd( x );
1900	_puts(",");
1901	_putd( y );
1902	_puts("] ******\n");
1903	#endif
1904
1905	// loop on peripherals
1906	for (periph_id = cluster[cluster_id].periph_offset;
1907	periph_id < cluster[cluster_id].periph_offset +
1908	cluster[cluster_id].periphs; periph_id++)
1909	{
1910	unsigned int type = periph[periph_id].type;
1911	unsigned int channels = periph[periph_id].channels;
1912
1913	switch (type)
1914	{
1915	case PERIPH_TYPE_IOC: // vci_block_device component
1916	{
1917	// initialize all channels except channel 0 because it has been
1918	// initialize during mapping_info loading
1919	for (channel_id = 1; channel_id < channels; channel_id++)
1920	{
1921	_ioc_init( channel_id );
1922	}
1923	#if BOOT_DEBUG_PERI
1924	_puts("- IOC / channels = ");
1925	_putd(channels);
1926	_puts("\n");
1927	#endif
1928	break;
1929	}
1930	case PERIPH_TYPE_DMA: // vci_multi_dma component
1931	{
1932	for (channel_id = 0; channel_id < channels; channel_id++)
1933	{
1934	_dma_init( cluster_xy, channel_id );
1935	}
1936	#if BOOT_DEBUG_PERI
1937	_puts("- DMA / channels = ");
1938	_putd(channels);
1939	_puts("\n");
1940	#endif
1941	break;
1942	}
1943	case PERIPH_TYPE_FBF: // vci_block_device component
1944	{
1945	// nothing to do
1946	#if BOOT_DEBUG_PERI
1947	_puts("- FBF / channels = ");
1948	_putd(channels);
1949	_puts("\n");
1950	#endif
1951	break;
1952	}
1953	case PERIPH_TYPE_CMA: // vci_chbuf_dma component
1954	{
1955	for (channel_id = 0; channel_id < channels; channel_id++)
1956	{
1957	// TODO
1958	}
1959	#if BOOT_DEBUG_PERI
1960	_puts("- CMA / channels = ");
1961	_putd(channels);
1962	_puts("\n");
1963	#endif
1964	break;
1965	}
1966	case PERIPH_TYPE_NIC: // vci_multi_nic component
1967	{
1968	for (channel_id = 0; channel_id < channels; channel_id++)
1969	{
1970	// TODO
1971	}
1972	#if BOOT_DEBUG_PERI
1973	_puts("- NIC / channels = ");
1974	_putd(channels);
1975	_puts("\n");
1976	#endif
1977	break;
1978	}
1979	case PERIPH_TYPE_XCU: // vci_xicu component
1980	{
1981	// nothing to do
1982	#if BOOT_DEBUG_PERI
1983	_puts("- XCU / channels = ");
1984	_putd(channels);
1985	_puts("\n");
1986	#endif
1987	break;
1988	}
1989	case PERIPH_TYPE_MMC: // vci_memcache config
1990	{
1991	// nothing to do
1992	#if BOOT_DEBUG_PERI
1993	_puts("- MMC / channels = ");
1994	_putd(channels);
1995	_puts("\n");
1996	#endif
1997	break;
1998	}
1999	case PERIPH_TYPE_TTY: // vci_multi_tty component
2000	{
2001	#if BOOT_DEBUG_PERI
2002	_puts("- TTY / channels = ");
2003	_putd(channels);
2004	_puts("\n");
2005	#endif
2006	break;
2007	}
2008	case PERIPH_TYPE_IOB: // vci_io_bridge component
2009	{
2010	if (USE_IOB)
2011	{
2012	// TODO
2013	// get the iommu page table physical address
2014	// define IPI address mapping the IOC interrupt
2015	// set IOMMU page table address
2016	// pseg_base[IOB_IOMMU_PTPR] = ptab_pbase;
2017	// activate IOMMU
2018	// pseg_base[IOB_IOMMU_ACTIVE] = 1;
2019	}
2020	#if BOOT_DEBUG_PERI
2021	_puts("- IOB / channels = ");
2022	_putd(channels);
2023	_puts("\n");
2024	#endif
2025	break;
2026	}
2027	} // end switch periph type
2028	} // end for periphs
2029
2030	#if BOOT_DEBUG_PERI
2031	_puts("\n[BOOT DEBUG] ****** coprocessors initialisation in cluster[");
2032	_putd( x );
2033	_puts(",");
2034	_putd( y );
2035	_puts("] ******\n");
2036	#endif
2037
2038	// loop on coprocessors
2039	for ( coproc_id = cluster[cluster_id].coproc_offset;
2040	coproc_id < cluster[cluster_id].coproc_offset +
2041	cluster[cluster_id].coprocs; coproc_id++ )
2042	{
2043
2044	#if BOOT_DEBUG_PERI
2045	_puts("- coprocessor name : ");
2046	_puts(coproc[coproc_id].name);
2047	_puts(" / nb ports = ");
2048	_putd((unsigned int) coproc[coproc_id].ports);
2049	_puts("\n");
2050	#endif
2051	// loop on the coprocessor ports
2052	for ( cp_port_id = coproc[coproc_id].port_offset;
2053	cp_port_id < coproc[coproc_id].port_offset + coproc[coproc_id].ports;
2054	cp_port_id++ )
2055	{
2056	unsigned int vspace_id = cp_port[cp_port_id].vspaceid;
2057	unsigned int vobj_id = cp_port[cp_port_id].mwmr_vobjid +
2058	vspace[vspace_id].vobj_offset;
2059
2060	// Get MWMR channel base address
2061	paddr_t mwmr_channel_pbase = vobj[vobj_id].paddr;
2062
2063	_mwr_hw_init( cluster_xy,
2064	cp_port_id,
2065	cp_port[cp_port_id].direction,
2066	mwmr_channel_pbase );
2067	#if BOOT_DEBUG_PERI
2068	_puts(" port direction: ");
2069	_putd( (unsigned int)cp_port[cp_port_id].direction );
2070	_puts(" / mwmr_channel_pbase = ");
2071	_putl( mwmr_channel_pbase );
2072	_puts(" / name = ");
2073	_puts(vobj[vobj_id].name);
2074	_puts(" / in vspace ");
2075	_puts(vspace[vspace_id].name);
2076	_puts("\n");
2077	#endif
2078	} // end for cp_ports
2079	} // end for coprocs
2080	} // end for clusters
2081	} // end boot_peripherals_init()
2082
2083	/////////////////////////////////////////////////////////////////////////
2084	// This function is the entry point of the boot code for all processors.
2085	// Most of this code is executed by Processor 0 only.
2086	/////////////////////////////////////////////////////////////////////////
2087	void boot_init()
2088	{
2089	mapping_header_t* header = (mapping_header_t *) & seg_boot_mapping_base;
2090	unsigned int gpid = _get_procid();
2091	unsigned int cluster_xy = gpid / NB_PROCS_MAX;
2092	unsigned int lpid = gpid % NB_PROCS_MAX;
2093
2094	if ( gpid == 0 ) // only Processor 0 does it
2095	{
2096	_puts("\n[BOOT] boot_init start at cycle ");
2097	_putd(_get_proctime());
2098	_puts("\n");
2099
2100	// Loading the map.bin file into memory and checking it
2101	boot_mapping_init();
2102
2103	_puts("\n[BOOT] Mapping ");
2104	_puts( header->name );
2105	_puts(" loaded at cycle ");
2106	_putd(_get_proctime());
2107	_puts("\n");
2108
2109	// Building all page tables
2110	boot_pt_init();
2111
2112	_puts("\n[BOOT] Page Tables initialisation completed at cycle ");
2113	_putd(_get_proctime());
2114	_puts("\n");
2115
2116	// Activating proc 0 MMU
2117	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0]>>13) );
2118	_set_mmu_mode( 0xF );
2119
2120	_puts("\n[BOOT] Processor[0,0,0] : MMU activation at cycle ");
2121	_putd(_get_proctime());
2122	_puts("\n");
2123
2124	// Initialising private vobjs in vspaces
2125	boot_vobjs_init();
2126
2127	_puts("\n[BOOT] Private vobjs initialised at cycle ");
2128	_putd(_get_proctime());
2129	_puts("\n");
2130
2131	// Initializing schedulers
2132	boot_schedulers_init();
2133
2134	_puts("\n[BOOT] All schedulers initialised at cycle ");
2135	_putd(_get_proctime());
2136	_puts("\n");
2137
2138	// Setting CP0_SCHED register for proc 0
2139	_set_sched( (unsigned int)_schedulers[0] );
2140
2141	// Initializing peripherals
2142	boot_peripherals_init();
2143
2144	_puts("\n[BOOT] All peripherals initialised at cycle ");
2145	_putd(_get_proctime());
2146	_puts("\n");
2147
2148	// Loading all .elf files
2149	boot_elf_load();
2150
2151	_puts("\n[BOOT] All ELF files loaded at cycle ");
2152	_putd(_get_proctime());
2153	_puts("\n");
2154
2155	// P0 starts all other processors
2156	unsigned int x,y,p;
2157	for (x = 0 ; x < X_SIZE ; x++)
2158	{
2159	for (y = 0 ; y < Y_SIZE ; y++)
2160	{
2161	for(p = 0; p < NB_PROCS_MAX; p++)
2162	{
2163	if ( (x != 0) \|\| (y != 0) \|\| (p != 0) )
2164	{
2165	_xcu_send_ipi( (x<<Y_WIDTH) + y,
2166	p,
2167	(unsigned int)boot_init );
2168	}
2169	}
2170	}
2171	}
2172	} // end monoprocessor boot
2173
2174	// reset BEV bit in the status register to use GIET exception
2175	// handler instead of the PRELOADER exception handler
2176	_set_sr( 0 );
2177
2178	// all processor initialise SCHED register
2179	_set_sched( (unsigned int)_schedulers[gpid] );
2180
2181	// all processors (but Proc 0) activate MMU
2182	if ( gpid != 0 )
2183	{
2184	_set_mmu_ptpr( (unsigned int)(_ptabs_paddr[0]>>13) );
2185	_set_mmu_mode( 0xF );
2186
2187	_tty_get_lock( 0 );
2188	_puts("\n[BOOT] Processor[");
2189	_putd( cluster_xy >> Y_WIDTH );
2190	_puts(",");
2191	_putd( cluster_xy & ((1<<Y_WIDTH)-1) );
2192	_puts(",");
2193	_putd( lpid );
2194	_puts("] : MMU activation at cycle ");
2195	_putd(_get_proctime());
2196	_puts("\n");
2197	_tty_release_lock( 0 );
2198	}
2199
2200	// all processors jump to kernel_init
2201	unsigned int kernel_entry = (unsigned int)&seg_kernel_init_base;
2202
2203	_tty_get_lock( 0 );
2204	_puts("\n[BOOT] Processor[");
2205	_putd( cluster_xy >> Y_WIDTH );
2206	_puts(",");
2207	_putd( cluster_xy & ((1<<Y_WIDTH)-1) );
2208	_puts(",");
2209	_putd( lpid );
2210	_puts("] enters kernel at cycle ");
2211	_putd( _get_proctime() );
2212	_puts(" / kernel entry = ");
2213	_putx( kernel_entry );
2214	_puts("\n");
2215	_tty_release_lock( 0 );
2216
2217	asm volatile( "jr %0" ::"r"(kernel_entry) );
2218
2219	} // end boot_init()
2220
2221
2222	// Local Variables:
2223	// tab-width: 4
2224	// c-basic-offset: 4
2225	// c-file-offsets:((innamespace . 0)(inline-open . 0))
2226	// indent-tabs-mode: nil
2227	// End:
2228	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
2229

Note: See TracBrowser for help on using the repository browser.

Download in other formats: