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source: trunk/kernel/kern/kernel_init.c @ 557

Last change on this file since 557 was 556, checked in by nicolas.van.phan@…, 6 years ago
Gather LETI-specific macros into hard_config.h
File size: 60.3 KB

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1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017)
6	*
7	* Copyright (c) Sorbonne Universites
8	*
9	* This file is part of ALMOS-MKH.
10	*
11	* ALMOS-MKH is free software; you can redistribute it and/or modify it
12	* under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; version 2.0 of the License.
14	*
15	* ALMOS-MKH is distributed in the hope that it will be useful, but
16	* WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18	* General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
22	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23	*/
24
25	#include <kernel_config.h>
26	#include <hard_config.h> // for the USE_TXT_XXX macros
27	#include <errno.h>
28	#include <hal_kernel_types.h>
29	#include <hal_special.h>
30	#include <hal_context.h>
31	#include <hal_irqmask.h>
32	#include <hal_ppm.h>
33	#include <barrier.h>
34	#include <remote_barrier.h>
35	#include <remote_fifo.h>
36	#include <core.h>
37	#include <list.h>
38	#include <xlist.h>
39	#include <xhtab.h>
40	#include <thread.h>
41	#include <scheduler.h>
42	#include <kmem.h>
43	#include <cluster.h>
44	#include <string.h>
45	#include <memcpy.h>
46	#include <ppm.h>
47	#include <page.h>
48	#include <chdev.h>
49	#include <boot_info.h>
50	#include <dqdt.h>
51	#include <dev_mmc.h>
52	#include <dev_dma.h>
53	#include <dev_iob.h>
54	#include <dev_ioc.h>
55	#include <dev_txt.h>
56	#include <dev_pic.h>
57	#include <printk.h>
58	#include <vfs.h>
59	#include <devfs.h>
60	#include <mapper.h>
61
62	///////////////////////////////////////////////////////////////////////////////////////////
63	// All the following global variables are replicated in all clusters.
64	// They are initialised by the kernel_init() function.
65	//
66	// WARNING : The section names have been defined to control the base addresses of the
67	// boot_info structure and the idle thread descriptors, through the kernel.ld script:
68	// - the boot_info structure is built by the bootloader, and used by kernel_init.
69	// it must be the first object in the kdata segment.
70	// - the array of idle threads descriptors must be placed on the first page boundary after
71	// the boot_info structure in the kdata segment.
72	///////////////////////////////////////////////////////////////////////////////////////////
73
74	// This variable defines the local boot_info structure
75	__attribute__((section(".kinfo")))
76	boot_info_t boot_info;
77
78	// This variable defines the "idle" threads descriptors array
79	__attribute__((section(".kidle")))
80	char idle_threads[CONFIG_THREAD_DESC_SIZE *
81	CONFIG_MAX_LOCAL_CORES] CONFIG_PPM_PAGE_ALIGNED;
82
83	// This variable defines the local cluster manager
84	__attribute__((section(".kdata")))
85	cluster_t cluster_manager CONFIG_CACHE_LINE_ALIGNED;
86
87	// This variable defines the TXT0 kernel terminal (TX only)
88	__attribute__((section(".kdata")))
89	chdev_t txt0_chdev CONFIG_CACHE_LINE_ALIGNED;
90
91	// This variable defines the TXT0 lock for writing characters to MTY0
92	__attribute__((section(".kdata")))
93	spinlock_t txt0_lock CONFIG_CACHE_LINE_ALIGNED;
94
95	// This variables define the kernel process0 descriptor
96	__attribute__((section(".kdata")))
97	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
98
99	// This variable defines extended pointers on the distributed chdevs
100	__attribute__((section(".kdata")))
101	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
102
103	// This variable contains the input IRQ indexes for the IOPIC controller
104	__attribute__((section(".kdata")))
105	iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
106
107	// This variable contains the input IRQ indexes for the LAPIC controller
108	__attribute__((section(".kdata")))
109	lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
110
111	// This variable defines the local cluster identifier
112	__attribute__((section(".kdata")))
113	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
114
115	// This variable is used for CP0 cores synchronisation in kernel_init()
116	__attribute__((section(".kdata")))
117	remote_barrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119	// This variable is used for local cores synchronisation in kernel_init()
120	__attribute__((section(".kdata")))
121	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
122
123	// This variable defines the array of supported File System contexts
124	__attribute__((section(".kdata")))
125	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
126
127	// kernel_init is the entry point defined in hal/tsar_mips32/kernel.ld
128	// It will be used by the bootloader.
129	extern void kernel_init( boot_info_t * info );
130
131	// these debug variables are used to analyse the sys_read() syscall timing
132
133	#if DEBUG_SYS_READ
134	uint32_t enter_sys_read;
135	uint32_t exit_sys_read;
136
137	uint32_t enter_devfs_read;
138	uint32_t exit_devfs_read;
139
140	uint32_t enter_txt_read;
141	uint32_t exit_txt_read;
142
143	uint32_t enter_chdev_cmd_read;
144	uint32_t exit_chdev_cmd_read;
145
146	uint32_t enter_chdev_server_read;
147	uint32_t exit_chdev_server_read;
148
149	uint32_t enter_tty_cmd_read;
150	uint32_t exit_tty_cmd_read;
151
152	uint32_t enter_tty_isr_read;
153	uint32_t exit_tty_isr_read;
154	#endif
155
156	// these debug variables are used to analyse the sys_write() syscall timing
157
158	#if DEBUG_SYS_WRITE
159	uint32_t enter_sys_write;
160	uint32_t exit_sys_write;
161
162	uint32_t enter_devfs_write;
163	uint32_t exit_devfs_write;
164
165	uint32_t enter_txt_write;
166	uint32_t exit_txt_write;
167
168	uint32_t enter_chdev_cmd_write;
169	uint32_t exit_chdev_cmd_write;
170
171	uint32_t enter_chdev_server_write;
172	uint32_t exit_chdev_server_write;
173
174	uint32_t enter_tty_cmd_write;
175	uint32_t exit_tty_cmd_write;
176
177	uint32_t enter_tty_isr_write;
178	uint32_t exit_tty_isr_write;
179	#endif
180
181	///////////////////////////////////////////////////////////////////////////////////////////
182	// This function displays the ALMOS_MKH banner.
183	///////////////////////////////////////////////////////////////////////////////////////////
184	static void print_banner( uint32_t nclusters , uint32_t ncores )
185	{
186	printk("\n"
187	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
188	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
189	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
190	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
191	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
192	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
193	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
194	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
195	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
196	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
197	CONFIG_ALMOS_VERSION , nclusters , ncores );
198	}
199
200
201	///////////////////////////////////////////////////////////////////////////////////////////
202	// This function initializes the TXT0 chdev descriptor, that is the "kernel terminal",
203	// shared by all kernel instances for debug messages.
204	// It is a global variable (replicated in all clusters), because this terminal is used
205	// before the kmem allocator initialisation, but only the instance in cluster containing
206	// the calling core is registered in the "chdev_dir" directory.
207	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
208	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
209	///////////////////////////////////////////////////////////////////////////////////////////
210	// @ info : pointer on the local boot-info structure.
211	///////////////////////////////////////////////////////////////////////////////////////////
212	static void txt0_device_init( boot_info_t * info )
213	{
214	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
215	uint32_t dev_nr; // actual number of devices in this cluster
216	xptr_t base; // remote pointer on segment base
217	uint32_t func; // device functional index
218	uint32_t impl; // device implementation index
219	uint32_t i; // device index in dev_tbl
220	uint32_t x; // X cluster coordinate
221	uint32_t y; // Y cluster coordinate
222	uint32_t channels; // number of channels
223
224	// get number of peripherals and base of devices array from boot_info
225	dev_nr = info->ext_dev_nr;
226	dev_tbl = info->ext_dev;
227
228	// loop on external peripherals to find TXT device
229	for( i = 0 ; i < dev_nr ; i++ )
230	{
231	base = dev_tbl[i].base;
232	func = FUNC_FROM_TYPE( dev_tbl[i].type );
233	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
234	channels = dev_tbl[i].channels;
235
236	if (func == DEV_FUNC_TXT )
237	{
238	assert( (channels > 0) , "number of TXT channels cannot be 0\n");
239
240	// initializes TXT_TX[0] chdev
241	txt0_chdev.func = func;
242	txt0_chdev.impl = impl;
243	txt0_chdev.channel = 0;
244	txt0_chdev.base = base;
245	txt0_chdev.is_rx = false;
246
247	// initializes lock
248	remote_spinlock_init( XPTR( local_cxy , &txt0_chdev.wait_lock ) );
249
250	// TXT specific initialisation:
251	// no server thread & no IRQ routing for channel 0
252	dev_txt_init( &txt0_chdev );
253
254	// register the TXT0 in all chdev_dir[x][y] structures
255	for( x = 0 ; x < info->x_size ; x++ )
256	{
257	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
258	{
259	cxy_t cxy = (x<<info->y_width) + y;
260	hal_remote_swd( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
261	XPTR( local_cxy , &txt0_chdev ) );
262	}
263	}
264	}
265	} // end loop on devices
266	} // end txt0_device_init()
267
268	///////////////////////////////////////////////////////////////////////////////////////////
269	// This function is the same as txt0_device_init() but uses the internal multi_tty device
270	// attached to cluster (0,0) instead of the external tty_tsar.
271	// This function is used instead of txt0_device_init() only for TSAR LETI.
272	///////////////////////////////////////////////////////////////////////////////////////////
273	// @ info : pointer on the local boot-info structure.
274	///////////////////////////////////////////////////////////////////////////////////////////
275	static void mtty0_device_init( boot_info_t * info)
276	{
277	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
278	uint32_t dev_nr; // actual number of devices in this cluster
279	xptr_t base; // remote pointer on segment base
280	uint32_t func; // device functional index
281	uint32_t impl; // device implementation index
282	uint32_t i; // device index in dev_tbl
283	uint32_t x; // X cluster coordinate
284	uint32_t y; // Y cluster coordinate
285
286	dev_nr = info->int_dev_nr;
287	dev_tbl = info->int_dev;
288
289	// Initialize spinlock for writing to MTY0
290	spinlock_init(&txt0_lock);
291
292	// Loop on internal peripherals of cluster (0,0) to find MTY0
293	for ( i = 0; i < dev_nr; i++ )
294	{
295	base = dev_tbl[i].base;
296	func = FUNC_FROM_TYPE( dev_tbl[i].type );
297	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
298
299	if ( func == DEV_FUNC_TXT )
300	{
301	txt0_chdev.func = func;
302	txt0_chdev.impl = impl;
303	txt0_chdev.channel = 0;
304	txt0_chdev.base = base;
305	txt0_chdev.is_rx = false;
306
307	// Initialize MTY0 chdev lock
308	remote_spinlock_init( XPTR( local_cxy, &txt0_chdev.wait_lock ) );
309
310	// MTY specific initialization
311	dev_txt_init( &txt0_chdev );
312
313	// register the MTY in all chdev_dir[x][y] structures
314	for( x = 0 ; x < info->x_size ; x++ )
315	{
316	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
317	{
318	cxy_t cxy = (x<<info->y_width) + y;
319	hal_remote_swd( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
320	XPTR( local_cxy , &txt0_chdev ) );
321	}
322	}
323	}
324	} // end loop on internal devices
325	} // end mty0_device_init()
326
327	///////////////////////////////////////////////////////////////////////////////////////////
328	// This function allocates memory and initializes the chdev descriptors for the internal
329	// peripherals contained in the local cluster, other than the LAPIC, as specified by
330	// the boot_info, including the linking with the driver for the specified implementation.
331	// The relevant entries in all copies of the devices directory are initialised.
332	///////////////////////////////////////////////////////////////////////////////////////////
333	// @ info : pointer on the local boot-info structure.
334	///////////////////////////////////////////////////////////////////////////////////////////
335	static void internal_devices_init( boot_info_t * info )
336	{
337	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
338	uint32_t dev_nr; // actual number of devices in this cluster
339	xptr_t base; // remote pointer on segment base
340	uint32_t func; // device functionnal index
341	uint32_t impl; // device implementation index
342	uint32_t i; // device index in dev_tbl
343	uint32_t x; // X cluster coordinate
344	uint32_t y; // Y cluster coordinate
345	uint32_t channels; // number of channels
346	uint32_t channel; // channel index
347	chdev_t * chdev_ptr; // local pointer on created chdev
348
349	// get number of internal peripherals and base from boot_info
350	dev_nr = info->int_dev_nr;
351	dev_tbl = info->int_dev;
352
353	// loop on internal peripherals
354	for( i = 0 ; i < dev_nr ; i++ )
355	{
356	base = dev_tbl[i].base;
357	channels = dev_tbl[i].channels;
358	func = FUNC_FROM_TYPE( dev_tbl[i].type );
359	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
360
361	//////////////////////////
362	if( func == DEV_FUNC_MMC )
363	{
364	assert( (channels == 1) , "MMC device must be single channel\n" );
365
366	// create chdev in local cluster
367	chdev_ptr = chdev_create( func,
368	impl,
369	0, // channel
370	false, // direction
371	base );
372
373	assert( (chdev_ptr != NULL) ,
374	"cannot allocate memory for MMC chdev\n" );
375
376	// make MMC specific initialisation
377	dev_mmc_init( chdev_ptr );
378
379	// set the MMC field in all chdev_dir[x][y] structures
380	for( x = 0 ; x < info->x_size ; x++ )
381	{
382	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
383	{
384	cxy_t cxy = (x<<info->y_width) + y;
385	hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
386	XPTR( local_cxy , chdev_ptr ) );
387	}
388	}
389
390	#if( DEBUG_KERNEL_INIT & 0x1 )
391	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
392	printk("\n[DBG] %s : created MMC in cluster %x / chdev = %x\n",
393	__FUNCTION__ , local_cxy , chdev_ptr );
394	#endif
395	}
396	///////////////////////////////
397	else if( func == DEV_FUNC_DMA )
398	{
399	// create one chdev per channel in local cluster
400	for( channel = 0 ; channel < channels ; channel++ )
401	{
402	// create chdev[channel] in local cluster
403	chdev_ptr = chdev_create( func,
404	impl,
405	channel,
406	false, // direction
407	base );
408
409	assert( (chdev_ptr != NULL) , "cannot allocate memory for DMA chdev" );
410
411	// make DMA specific initialisation
412	dev_dma_init( chdev_ptr );
413
414	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
415	// structure because the DMA device is not remotely accessible.
416	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
417
418	#if( DEBUG_KERNEL_INIT & 0x1 )
419	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
420	printk("\n[DBG] %s : created DMA[%d] in cluster %x / chdev = %x\n",
421	__FUNCTION__ , channel , local_cxy , chdev_ptr );
422	#endif
423	}
424	}
425
426	///////////////////////////////
427	else if ( func == DEV_FUNC_TXT && USE_TXT_MTY == 1 )
428	{
429	assert(impl == IMPL_TXT_MTY,
430	"Internal TTYs should have MTY implementation\n");
431
432	for ( channel = 0; channel < channels; channel++ )
433	{
434	int rx;
435	for ( rx = 0; rx <= 1; rx++ )
436	{
437	// skip MTY0_TX since it has already been initialized
438	if ( channel == 0 && rx == 0 ) continue;
439
440	// create chdev in local cluster
441	chdev_ptr = chdev_create( func,
442	impl,
443	channel,
444	rx,
445	base );
446
447	assert( (chdev_ptr != NULL) ,
448	"cannot allocate memory for MTY chdev" );
449
450	// make MTY specific initialization
451	dev_txt_init( chdev_ptr );
452
453	// set the MTY fields in all clusters
454	xptr_t *chdev_entry;
455	if ( rx == 1 ) {
456	chdev_entry = &chdev_dir.txt_rx[channel];
457	} else {
458	chdev_entry = &chdev_dir.txt_tx[channel];
459	}
460	for ( x = 0; x < info->x_max; x++ )
461	{
462	for ( y = 0; y < info->y_max; y++ )
463	{
464	cxy_t cxy = (x<<info->y_width) + y;
465	hal_remote_swd( XPTR( cxy, chdev_entry ),
466	XPTR( local_cxy, chdev_ptr ) );
467	}
468	}
469	#if( DEBUG_KERNEL_INIT & 0x1 )
470	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
471	printk("\n[DBG] %s : created MTY[%d] in cluster %x / chdev = %x\n",
472	__FUNCTION__ , channel , local_cxy , chdev_ptr );
473	#endif
474	}
475	}
476	}
477
478	///////////////////////////////
479	else if ( func == DEV_FUNC_IOC )
480	{
481	assert(impl == IMPL_IOC_SPI, __FUNCTION__,
482	"Internal IOC should have SPI implementation\n");
483
484	for ( channel = 0; channel < channels; channel++ )
485	{
486	// create chdev in local cluster
487	chdev_ptr = chdev_create( func,
488	impl,
489	channel,
490	0,
491	base );
492
493	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
494	"cannot allocate memory for IOC chdev" );
495
496	// make IOC specific initialization
497	dev_ioc_init( chdev_ptr );
498
499	// set the IOC fields in all clusters
500	xptr_t *chdev_entry = &chdev_dir.ioc[channel];
501	for ( x = 0; x < info->x_max; x++ )
502	{
503	for ( y = 0; y < info->y_max; y++ )
504	{
505	cxy_t cxy = (x<<info->y_width) + y;
506	hal_remote_swd( XPTR( cxy, chdev_entry ),
507	XPTR( local_cxy, chdev_ptr ) );
508	}
509	}
510	#if( DEBUG_KERNEL_INIT & 0x1 )
511	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
512	printk("\n[DBG] %s : created IOC[%d] in cluster %x / chdev = %x\n",
513	__FUNCTION__ , channel , local_cxy , chdev_ptr );
514	#endif
515	}
516	}
517
518	}
519	} // end internal_devices_init()
520
521	///////////////////////////////////////////////////////////////////////////////////////////
522	// This function allocates memory and initializes the chdev descriptors for the
523	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
524	// This includes the dynamic linking with the driver for the specified implementation.
525	// These chdev descriptors are distributed on all clusters, using a modulo on a global
526	// index, identically computed in all clusters.
527	// This function is executed in all clusters by the CP0 core, that computes a global index
528	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
529	// the local cluster, because the global index matches the local index.
530	// The relevant entries in all copies of the devices directory are initialised.
531	///////////////////////////////////////////////////////////////////////////////////////////
532	// @ info : pointer on the local boot-info structure.
533	///////////////////////////////////////////////////////////////////////////////////////////
534	static void external_devices_init( boot_info_t * info )
535	{
536	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
537	uint32_t dev_nr; // actual number of external devices
538	xptr_t base; // remote pointer on segment base
539	uint32_t func; // device functionnal index
540	uint32_t impl; // device implementation index
541	uint32_t i; // device index in dev_tbl
542	uint32_t x; // X cluster coordinate
543	uint32_t y; // Y cluster coordinate
544	uint32_t channels; // number of channels
545	uint32_t channel; // channel index
546	uint32_t directions; // number of directions (1 or 2)
547	uint32_t rx; // direction index (0 or 1)
548	chdev_t * chdev; // local pointer on one channel_device descriptor
549	uint32_t ext_chdev_gid; // global index of external chdev
550
551	// get number of peripherals and base of devices array from boot_info
552	dev_nr = info->ext_dev_nr;
553	dev_tbl = info->ext_dev;
554
555	// initializes global index (PIC is already placed in cluster 0
556	ext_chdev_gid = 1;
557
558	// loop on external peripherals
559	for( i = 0 ; i < dev_nr ; i++ )
560	{
561	base = dev_tbl[i].base;
562	channels = dev_tbl[i].channels;
563	func = FUNC_FROM_TYPE( dev_tbl[i].type );
564	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
565
566	// There is one chdev per direction for NIC and for TXT
567	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
568	else directions = 1;
569
570	// do nothing for ROM, that does not require a device descriptor.
571	if( func == DEV_FUNC_ROM ) continue;
572
573	// do nothing for PIC, that is already initialized
574	if( func == DEV_FUNC_PIC ) continue;
575
576	// check PIC device initialized
577	assert( (chdev_dir.pic != XPTR_NULL ) ,
578	"PIC device must be initialized before other devices\n" );
579
580	// check external device functionnal type
581	assert( ( (func == DEV_FUNC_IOB) \|\|
582	(func == DEV_FUNC_IOC) \|\|
583	(func == DEV_FUNC_TXT) \|\|
584	(func == DEV_FUNC_NIC) \|\|
585	(func == DEV_FUNC_FBF) ) ,
586	"undefined external peripheral type\n" );
587
588	// loops on channels
589	for( channel = 0 ; channel < channels ; channel++ )
590	{
591	// loop on directions
592	for( rx = 0 ; rx < directions ; rx++ )
593	{
594	// skip TXT_TX[0] chdev that has already been created & registered
595	if( USE_TXT_MTY == 0 && (func == DEV_FUNC_TXT) && (channel == 0) && (rx == 0) )
596	{
597	continue;
598	}
599
600	// skip TXT chdevs because they are initialized in internal_devices_init()
601	if ( USE_TXT_MTY == 1 && func == DEV_FUNC_TXT )
602	{
603	continue;
604	}
605
606	if ( func == DEV_FUNC_IOC && impl == IMPL_IOC_SPI )
607	{
608	continue;
609	}
610
611	// compute target cluster for chdev[func,channel,direction]
612	uint32_t offset = ext_chdev_gid % ( info->x_size * (info->y_max) ); // [FIXME]
613	uint32_t cx = offset / (info->y_max); // [FIXME]
614	uint32_t cy = offset % (info->y_max); // [FIXME]
615	uint32_t target_cxy = (cx<<info->y_width) + cy;
616
617	// allocate and initialize a local chdev
618	// when local cluster matches target cluster
619	if( target_cxy == local_cxy )
620	{
621	chdev = chdev_create( func,
622	impl,
623	channel,
624	rx, // direction
625	base );
626
627	assert( (chdev != NULL),
628	"cannot allocate external device" );
629
630	// make device type specific initialisation
631	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
632	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
633	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
634	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
635	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
636
637	// all external (shared) devices are remotely accessible
638	// initialize the replicated chdev_dir[x][y] structures
639	// defining the extended pointers on chdev descriptors
640	xptr_t * entry;
641
642	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
643	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
644	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
645	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
646	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
647	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
648	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
649
650	for( x = 0 ; x < info->x_size ; x++ )
651	{
652	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
653	{
654	cxy_t cxy = (x<<info->y_width) + y;
655	hal_remote_swd( XPTR( cxy , entry ),
656	XPTR( local_cxy , chdev ) );
657	}
658	}
659
660	#if( DEBUG_KERNEL_INIT & 0x1 )
661	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
662	printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
663	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
664	#endif
665	} // end if match
666
667	// increment chdev global index (matching or not)
668	ext_chdev_gid++;
669
670	} // end loop on directions
671	} // end loop on channels
672	} // end loop on devices
673	} // end external_devices_init()
674
675	///////////////////////////////////////////////////////////////////////////////////////////
676	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
677	// device, namely the informations attached to the external IOPIC controller, that
678	// must be replicated in all clusters (struct iopic_input).
679	// This initialisation must be done before other devices initialisation because the IRQ
680	// routing infrastructure is required for both internal and external devices init.
681	///////////////////////////////////////////////////////////////////////////////////////////
682	// @ info : pointer on the local boot-info structure.
683	///////////////////////////////////////////////////////////////////////////////////////////
684	static void iopic_init( boot_info_t * info )
685	{
686	boot_device_t * dev_tbl; // pointer on boot_info external devices array
687	uint32_t dev_nr; // actual number of external devices
688	xptr_t base; // remote pointer on segment base
689	uint32_t func; // device functionnal index
690	uint32_t impl; // device implementation index
691	uint32_t i; // device index in dev_tbl
692	uint32_t x; // cluster X coordinate
693	uint32_t y; // cluster Y coordinate
694	bool_t found; // IOPIC found
695	chdev_t * chdev; // pointer on PIC chdev descriptor
696
697	// get number of external peripherals and base of array from boot_info
698	dev_nr = info->ext_dev_nr;
699	dev_tbl = info->ext_dev;
700
701	// loop on external peripherals to get the IOPIC
702	for( i = 0 , found = false ; i < dev_nr ; i++ )
703	{
704	func = FUNC_FROM_TYPE( dev_tbl[i].type );
705
706	if( func == DEV_FUNC_PIC )
707	{
708	base = dev_tbl[i].base;
709	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
710	found = true;
711	break;
712	}
713	}
714
715	assert( found , "PIC device not found\n" );
716
717	// allocate and initialize the PIC chdev in cluster 0
718	chdev = chdev_create( DEV_FUNC_PIC,
719	impl,
720	0, // channel
721	0, // direction,
722	base );
723
724	assert( (chdev != NULL), "no memory for PIC chdev\n" );
725
726	// make PIC device type specific initialisation
727	dev_pic_init( chdev );
728
729	// register, in all clusters, the extended pointer
730	// on PIC chdev in "chdev_dir" array
731	xptr_t * entry = &chdev_dir.pic;
732
733	for( x = 0 ; x < info->x_size ; x++ )
734	{
735	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
736	{
737	cxy_t cxy = (x<<info->y_width) + y;
738	hal_remote_swd( XPTR( cxy , entry ) ,
739	XPTR( local_cxy , chdev ) );
740	}
741	}
742
743	// initialize, in all clusters, the "iopic_input" structure
744	// defining how external IRQs are connected to IOPIC
745
746	// register default value for unused inputs
747	for( x = 0 ; x < info->x_size ; x++ )
748	{
749	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
750	{
751	cxy_t cxy = (x<<info->y_width) + y;
752	hal_remote_memset( XPTR( cxy , &iopic_input ) , 0xFF , sizeof(iopic_input_t) );
753	}
754	}
755
756	// register input IRQ index for valid inputs
757	uint32_t id; // input IRQ index
758	uint8_t valid; // input IRQ is connected
759	uint32_t type; // source device type
760	uint8_t channel; // source device channel
761	uint8_t is_rx; // source device direction
762	uint32_t * ptr; // local pointer on one field in iopic_input stucture
763
764	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
765	{
766	valid = dev_tbl[i].irq[id].valid;
767	type = dev_tbl[i].irq[id].dev_type;
768	channel = dev_tbl[i].irq[id].channel;
769	is_rx = dev_tbl[i].irq[id].is_rx;
770	func = FUNC_FROM_TYPE( type );
771
772	// get pointer on relevant field in iopic_input
773	if( valid )
774	{
775	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
776	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
777	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
778	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
779	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
780	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
781	else assert( false , "illegal source device for IOPIC input" );
782
783	// set one entry in all "iopic_input" structures
784	for( x = 0 ; x < info->x_size ; x++ )
785	{
786	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
787	{
788	cxy_t cxy = (x<<info->y_width) + y;
789	hal_remote_swd( XPTR( cxy , ptr ) , id );
790	}
791	}
792	}
793	}
794
795	#if( DEBUG_KERNEL_INIT & 0x1 )
796	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
797	{
798	printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
799	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
800	dev_pic_inputs_display();
801	}
802	#endif
803
804	} // end iopic_init()
805
806	///////////////////////////////////////////////////////////////////////////////////////////
807	// This function is called by all CP0s in all cluster to complete the PIC device
808	// initialisation, namely the informations attached to the LAPIC controller.
809	// This initialisation must be done after the IOPIC initialisation, but before other
810	// devices initialisation because the IRQ routing infrastructure is required for both
811	// internal and external devices initialisation.
812	///////////////////////////////////////////////////////////////////////////////////////////
813	// @ info : pointer on the local boot-info structure.
814	///////////////////////////////////////////////////////////////////////////////////////////
815	static void lapic_init( boot_info_t * info )
816	{
817	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
818	uint32_t dev_nr; // number of internal devices
819	uint32_t i; // device index in dev_tbl
820	xptr_t base; // remote pointer on segment base
821	uint32_t func; // device functionnal type in boot_info
822	bool_t found; // LAPIC found
823
824	// get number of internal peripherals and base
825	dev_nr = info->int_dev_nr;
826	dev_tbl = info->int_dev;
827
828	// loop on internal peripherals to get the lapic device
829	for( i = 0 , found = false ; i < dev_nr ; i++ )
830	{
831	func = FUNC_FROM_TYPE( dev_tbl[i].type );
832
833	if( func == DEV_FUNC_ICU )
834	{
835	base = dev_tbl[i].base;
836	found = true;
837	break;
838	}
839	}
840
841	// if the LAPIC controller is not defined in the boot_info,
842	// we simply don't initialize the PIC extensions in the kernel,
843	// making the assumption that the LAPIC related informations
844	// are hidden in the hardware specific PIC driver.
845	if( found )
846	{
847	// initialise the PIC extensions for
848	// the core descriptor and core manager extensions
849	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
850
851	// initialize the "lapic_input" structure
852	// defining how internal IRQs are connected to LAPIC
853	uint32_t id;
854	uint8_t valid;
855	uint8_t channel;
856	uint32_t func;
857
858	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
859	{
860	valid = dev_tbl[i].irq[id].valid;
861	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
862	channel = dev_tbl[i].irq[id].channel;
863
864	if( valid ) // only valid local IRQs are registered
865	{
866	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
867	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
868	else if( func == DEV_FUNC_TXT ) lapic_input.mtty = id;
869	else if( func == DEV_FUNC_IOC ) lapic_input.sdcard = id;
870	else assert( false , "illegal source device for LAPIC input" );
871	}
872	}
873	}
874	} // end lapic_init()
875
876	///////////////////////////////////////////////////////////////////////////////////////////
877	// This static function returns the identifiers of the calling core.
878	///////////////////////////////////////////////////////////////////////////////////////////
879	// @ info : pointer on boot_info structure.
880	// @ lid : [out] core local index in cluster.
881	// @ cxy : [out] cluster identifier.
882	// @ lid : [out] core global identifier (hardware).
883	// @ return 0 if success / return EINVAL if not found.
884	///////////////////////////////////////////////////////////////////////////////////////////
885	static error_t get_core_identifiers( boot_info_t * info,
886	lid_t * lid,
887	cxy_t * cxy,
888	gid_t * gid )
889	{
890	uint32_t i;
891	gid_t global_id;
892
893	// get global identifier from hardware register
894	global_id = hal_get_gid();
895
896	// makes an associative search in boot_info to get (cxy,lid) from global_id
897	for( i = 0 ; i < info->cores_nr ; i++ )
898	{
899	if( global_id == info->core[i].gid )
900	{
901	*lid = info->core[i].lid;
902	*cxy = info->core[i].cxy;
903	*gid = global_id;
904	return 0;
905	}
906	}
907	return EINVAL;
908	}
909
910	///////////////////////////////////////////////////////////////////////////////////////////
911	// This function is the entry point for the kernel initialisation.
912	// It is executed by all cores in all clusters, but only core[0], called CP0,
913	// initializes the shared resources such as the cluster manager, or the local peripherals.
914	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
915	// only information contained in the local boot_info_t structure, set by the bootloader.
916	// Only CP0 in cluster 0 print the log messages.
917	///////////////////////////////////////////////////////////////////////////////////////////
918	// @ info : pointer on the local boot-info structure.
919	///////////////////////////////////////////////////////////////////////////////////////////
920	void kernel_init( boot_info_t * info )
921	{
922	lid_t core_lid = -1; // running core local index
923	cxy_t core_cxy = -1; // running core cluster identifier
924	gid_t core_gid; // running core hardware identifier
925	cluster_t * cluster; // pointer on local cluster manager
926	core_t * core; // pointer on running core descriptor
927	thread_t * thread; // pointer on idle thread descriptor
928
929	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
930	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
931	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
932	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
933
934	error_t error;
935	reg_t status; // running core status register
936
937	/////////////////////////////////////////////////////////////////////////////////
938	// STEP 0 : Each core get its core identifier from boot_info, and makes
939	// a partial initialisation of its private idle thread descriptor.
940	// CP0 initializes the "local_cxy" global variable.
941	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
942	/////////////////////////////////////////////////////////////////////////////////
943
944	error = get_core_identifiers( info,
945	&core_lid,
946	&core_cxy,
947	&core_gid );
948
949	// CP0 initializes cluster identifier
950	if( core_lid == 0 ) local_cxy = info->cxy;
951
952	// each core gets a pointer on its private idle thread descriptor
953	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
954
955	// each core registers this thread pointer in hardware register
956	hal_set_current_thread( thread );
957
958	// each core register core descriptor pointer in idle thread descriptor
959	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
960
961	// each core initializes the idle thread lists of locks
962	list_root_init( &thread->locks_root );
963	xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) );
964	thread->local_locks = 0;
965	thread->remote_locks = 0;
966
967	// CP0 in cluster 0 initializes TXT0 chdev descriptor
968	if( core_cxy == 0 && core_lid == 0 ) // [MODIF]
969	{
970	if( USE_TXT_MTY == 1 ) {
971	mtty0_device_init( info );
972	} else {
973	txt0_device_init( info );
974	}
975	}
976	// [FIXME]
977
978	/////////////////////////////////////////////////////////////////////////////////
979	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
980	(info->x_size * (info->y_max)) );
981	barrier_wait( &local_barrier , info->cores_nr );
982	/////////////////////////////////////////////////////////////////////////////////
983
984	#if DEBUG_KERNEL_INIT
985	if( (core_lid == 0) & (local_cxy == 0) )
986	printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / cycle %d\n",
987	__FUNCTION__, (uint32_t)hal_get_cycles() );
988	#endif
989
990	/////////////////////////////////////////////////////////////////////////////
991	// STEP 1 : all cores check core identifier.
992	// CP0 initializes the local cluster manager.
993	// This includes the memory allocators.
994	/////////////////////////////////////////////////////////////////////////////
995
996	// all cores check identifiers
997	if( error )
998	{
999	assert( false ,
1000	"illegal core identifiers gid = %x / cxy = %x / lid = %d",
1001	core_lid , core_cxy , core_lid );
1002	}
1003
1004	// CP0 initializes cluster manager
1005	if( core_lid == 0 )
1006	{
1007	error = cluster_init( info );
1008
1009	if( error )
1010	{
1011	assert( false ,
1012	"cannot initialise cluster %x", local_cxy );
1013	}
1014	}
1015
1016	/////////////////////////////////////////////////////////////////////////////////
1017	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1018	(info->x_size * (info->y_max)) );
1019	barrier_wait( &local_barrier , info->cores_nr );
1020	/////////////////////////////////////////////////////////////////////////////////
1021
1022	#if DEBUG_KERNEL_INIT
1023	if( (core_lid == 0) & (local_cxy == 0) )
1024	printk("\n[DBG] %s : exit barrier 1 : clusters initialised / cycle %d\n",
1025	__FUNCTION__, (uint32_t)hal_get_cycles() );
1026	#endif
1027
1028	/////////////////////////////////////////////////////////////////////////////////
1029	// STEP 2 : CP0 initializes the process_zero descriptor.
1030	// CP0 in cluster 0 initializes the IOPIC device.
1031	/////////////////////////////////////////////////////////////////////////////////
1032
1033	// all cores get pointer on local cluster manager & core descriptor
1034	cluster = &cluster_manager;
1035	core = &cluster->core_tbl[core_lid];
1036
1037	// all CP0s initialize the process_zero descriptor
1038	if( core_lid == 0 ) process_zero_create( &process_zero );
1039
1040	// CP0 in cluster 0 initializes the PIC chdev,
1041	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1042
1043	////////////////////////////////////////////////////////////////////////////////
1044	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1045	(info->x_size * (info->y_max)) );
1046	barrier_wait( &local_barrier , info->cores_nr );
1047	////////////////////////////////////////////////////////////////////////////////
1048
1049	#if DEBUG_KERNEL_INIT
1050	if( (core_lid == 0) & (local_cxy == 0) )
1051	printk("\n[DBG] %s : exit barrier 2 : PIC initialised / cycle %d\n",
1052	__FUNCTION__, (uint32_t)hal_get_cycles() );
1053	#endif
1054
1055	////////////////////////////////////////////////////////////////////////////////
1056	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
1057	// CP0 initializes the internal chdev descriptors
1058	// CP0 initialize the local external chdev descriptors
1059	////////////////////////////////////////////////////////////////////////////////
1060
1061	// all CP0s initialize their local LAPIC extension,
1062	if( core_lid == 0 ) lapic_init( info );
1063
1064	// CP0 scan the internal (private) peripherals,
1065	// and allocates memory for the corresponding chdev descriptors.
1066	if( core_lid == 0 ) internal_devices_init( info );
1067
1068
1069	// All CP0s contribute to initialise external peripheral chdev descriptors.
1070	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
1071	// and allocates memory for the chdev descriptors that must be placed
1072	// on the (cxy) cluster according to the global index value.
1073
1074	if( core_lid == 0 ) external_devices_init( info );
1075
1076	/////////////////////////////////////////////////////////////////////////////////
1077	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1078	(info->x_size * (info->y_max)) );
1079	barrier_wait( &local_barrier , info->cores_nr );
1080	/////////////////////////////////////////////////////////////////////////////////
1081
1082	#if DEBUG_KERNEL_INIT
1083	if( (core_lid == 0) & (local_cxy == 0) )
1084	printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / cycle %d\n",
1085	__FUNCTION__, (uint32_t)hal_get_cycles() );
1086	#endif
1087
1088	#if( DEBUG_KERNEL_INIT & 1 )
1089	if( (core_lid == 0) & (local_cxy == 0) )
1090	chdev_dir_display();
1091	#endif
1092
1093	/////////////////////////////////////////////////////////////////////////////////
1094	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
1095	// Alh cores initialize IDLE thread.
1096	// Only CP0 in cluster 0 creates the VFS root inode.
1097	// It access the boot device to initialize the file system context.
1098	/////////////////////////////////////////////////////////////////////////////////
1099
1100	// All cores enable the shared IPI channel
1101	dev_pic_enable_ipi();
1102	hal_enable_irq( &status );
1103
1104	#if DEBUG_KERNEL_INIT
1105	printk("\n[DBG] %s: IPI enabled for core %d cluster %d\n", __FUNCTION__,
1106	core_lid, local_cxy);
1107	#endif
1108
1109	// all cores initialize the idle thread descriptor
1110	thread_idle_init( thread,
1111	THREAD_IDLE,
1112	&thread_idle_func,
1113	NULL,
1114	core_lid );
1115
1116	// all cores unblock idle thread, and register it in scheduler
1117	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1118	core->scheduler.idle = thread;
1119
1120	#if( DEBUG_KERNEL_INIT & 1 )
1121	sched_display( core_lid );
1122	#endif
1123
1124	// CPO in cluster 0 creates the VFS root
1125	if( (core_lid == 0) && (local_cxy == 0 ) )
1126	{
1127	vfs_root_inode_xp = XPTR_NULL;
1128
1129	// File System must be FATFS in this implementation,
1130	// but other File System can be introduced here
1131	if( CONFIG_VFS_ROOT_IS_FATFS )
1132	{
1133	// 1. allocate memory for FATFS context in cluster 0
1134	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1135
1136	assert( (fatfs_ctx != NULL) ,
1137	"cannot create FATFS context in cluster 0\n" );
1138
1139	// 2. access boot device to initialize FATFS context
1140	fatfs_ctx_init( fatfs_ctx );
1141
1142	// 3. get various informations from FATFS context
1143	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1144	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1145	fatfs_ctx->sectors_per_cluster;
1146	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1147
1148	// 4. create VFS root inode in cluster 0
1149	error = vfs_inode_create( XPTR_NULL, // dentry_xp
1150	FS_TYPE_FATFS, // fs_type
1151	INODE_TYPE_DIR, // inode_type
1152	(void *)(intptr_t)root_dir_cluster, // extend
1153	0, // attr
1154	0, // rights
1155	0, // uid
1156	0, // gid
1157	&vfs_root_inode_xp ); // return
1158
1159	assert( (error == 0) ,
1160	"cannot create VFS root inode\n" );
1161
1162	// 5. initialize VFS context for FAT in cluster 0
1163	vfs_ctx_init( FS_TYPE_FATFS, // file system type
1164	0, // attributes
1165	total_clusters,
1166	cluster_size,
1167	vfs_root_inode_xp, // VFS root
1168	fatfs_ctx ); // extend
1169
1170	// 6. check initialisation
1171	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1172	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1173	"illegal value for FATFS context in cluster %x\n", local_cxy );
1174	}
1175	else
1176	{
1177	assert( false ,
1178	"root FS must be FATFS" );
1179	}
1180
1181	// register VFS root inode in process_zero descriptor of cluster 0
1182	process_zero.vfs_root_xp = vfs_root_inode_xp;
1183	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1184	}
1185
1186	/////////////////////////////////////////////////////////////////////////////////
1187	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1188	(info->x_size * (info->y_max)) );
1189	barrier_wait( &local_barrier , info->cores_nr );
1190	/////////////////////////////////////////////////////////////////////////////////
1191
1192	#if DEBUG_KERNEL_INIT
1193	if( (core_lid == 0) & (local_cxy == 0) )
1194	printk("\n[DBG] %s : exit barrier 4 : VFS_root = %l in cluster 0 / cycle %d\n",
1195	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1196	#endif
1197
1198	/////////////////////////////////////////////////////////////////////////////////
1199	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1200	// and initialise both the local FS context and the local VFS context
1201	// from values stored in cluster 0.
1202	// They get the VFS root inode extended pointer from cluster 0.
1203	/////////////////////////////////////////////////////////////////////////////////
1204
1205	if( (core_lid == 0) && (local_cxy != 0) )
1206	{
1207	// File System must be FATFS in this implementation,
1208	// but other File System can be introduced here
1209	if( CONFIG_VFS_ROOT_IS_FATFS )
1210	{
1211	// 1. allocate memory for local FATFS context
1212	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1213
1214	assert( (local_fatfs_ctx != NULL) ,
1215	"cannot create FATFS context in cluster %x\n", local_cxy );
1216
1217	// 2. get local pointer on VFS context for FATFS
1218	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1219
1220	// 3. get local pointer on FATFS context in cluster 0
1221	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1222
1223	// 4. copy FATFS context from cluster 0 to local cluster
1224	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1225	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1226
1227	// 5. copy VFS context from cluster 0 to local cluster
1228	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1229	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1230
1231	// 6. update extend field in local copy of VFS context
1232	vfs_ctx->extend = local_fatfs_ctx;
1233
1234	// 7. check initialisation
1235	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1236	"illegal value for FATFS context in cluster %x\n", local_cxy );
1237	}
1238
1239	// get extended pointer on VFS root inode from cluster 0
1240	vfs_root_inode_xp = hal_remote_lwd( XPTR( 0 , &process_zero.vfs_root_xp ) );
1241
1242	// update local process_zero descriptor
1243	process_zero.vfs_root_xp = vfs_root_inode_xp;
1244	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1245	}
1246
1247	/////////////////////////////////////////////////////////////////////////////////
1248	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1249	(info->x_size * (info->y_max)) );
1250	barrier_wait( &local_barrier , info->cores_nr );
1251	/////////////////////////////////////////////////////////////////////////////////
1252
1253	#if DEBUG_KERNEL_INIT
1254	if( (core_lid == 0) & (local_cxy == 0) )
1255	printk("\n[DBG] %s : exit barrier 5 : VFS_root = %l in cluster 0 / cycle %d\n",
1256	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1257	#endif
1258
1259	/////////////////////////////////////////////////////////////////////////////////
1260	// STEP 6 : CP0 in cluster IO makes the global DEVFS tree initialisation:
1261	// It creates the DEVFS directory "dev", and the DEVFS "external"
1262	// directory in cluster IO and mount these inodes into VFS.
1263	/////////////////////////////////////////////////////////////////////////////////
1264
1265	if( (core_lid == 0) && (local_cxy == 0) ) // [FIXME]
1266	{
1267	// create "dev" and "external" directories.
1268	devfs_global_init( process_zero.vfs_root_xp,
1269	&devfs_dev_inode_xp,
1270	&devfs_external_inode_xp );
1271
1272	// creates the DEVFS context in cluster IO
1273	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1274
1275	assert( (devfs_ctx != NULL) ,
1276	"cannot create DEVFS context in cluster IO\n");
1277
1278	// register DEVFS root and external directories
1279	devfs_ctx_init( devfs_ctx, devfs_dev_inode_xp, devfs_external_inode_xp );
1280	}
1281
1282	/////////////////////////////////////////////////////////////////////////////////
1283	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1284	(info->x_size * (info->y_max)) );
1285	barrier_wait( &local_barrier , info->cores_nr );
1286	/////////////////////////////////////////////////////////////////////////////////
1287
1288	#if DEBUG_KERNEL_INIT
1289	if( (core_lid == 0) & (local_cxy == 0) )
1290	printk("\n[DBG] %s : exit barrier 6 : dev_root = %l in cluster 0 / cycle %d\n",
1291	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1292	#endif
1293
1294	/////////////////////////////////////////////////////////////////////////////////
1295	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1296	// Each CP0 get the "dev" and "external" extended pointers from
1297	// values stored in cluster IO.
1298	// Then each CP0 in cluster(i) creates the DEVFS "internal directory,
1299	// and creates the pseudo-files for all chdevs in cluster (i).
1300	/////////////////////////////////////////////////////////////////////////////////
1301
1302	if( core_lid == 0 )
1303	{
1304	// get extended pointer on "extend" field of VFS context for DEVFS in cluster IO
1305	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend ); // [FIXME]
1306
1307	// get pointer on DEVFS context in cluster 0
1308	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1309
1310	devfs_dev_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1311	devfs_external_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1312
1313	// populate DEVFS in all clusters
1314	devfs_local_init( devfs_dev_inode_xp,
1315	devfs_external_inode_xp,
1316	&devfs_internal_inode_xp );
1317	}
1318
1319	/////////////////////////////////////////////////////////////////////////////////
1320	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1321	(info->x_size * (info->y_max)) );
1322	barrier_wait( &local_barrier , info->cores_nr );
1323	/////////////////////////////////////////////////////////////////////////////////
1324
1325	#if DEBUG_KERNEL_INIT
1326	if( (core_lid == 0) & (local_cxy == 0) )
1327	printk("\n[DBG] %s : exit barrier 7 : dev_root = %l in cluster 0 / cycle %d\n",
1328	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1329	#endif
1330
1331	/////////////////////////////////////////////////////////////////////////////////
1332	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1333	/////////////////////////////////////////////////////////////////////////////////
1334
1335	if( (core_lid == 0) && (local_cxy == 0) )
1336	{
1337
1338	#if( DEBUG_KERNEL_INIT & 1 )
1339	vfs_display( vfs_root_inode_xp );
1340	#endif
1341
1342	process_init_create();
1343	}
1344
1345	/////////////////////////////////////////////////////////////////////////////////
1346	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1347	(info->x_size * (info->y_max)) );
1348	barrier_wait( &local_barrier , info->cores_nr );
1349	/////////////////////////////////////////////////////////////////////////////////
1350
1351	#if DEBUG_KERNEL_INIT
1352	if( (core_lid == 0) & (local_cxy == 0) )
1353	printk("\n[DBG] %s : exit barrier 8 : process init created / cycle %d\n",
1354	__FUNCTION__ , (uint32_t)hal_get_cycles() );
1355	#endif
1356
1357	#if (DEBUG_KERNEL_INIT & 1)
1358	if( (core_lid == 0) /& (local_cxy == 0)/ )
1359	sched_display( 0 );
1360	#endif
1361
1362	/////////////////////////////////////////////////////////////////////////////////
1363	// STEP 9 : CP0 in cluster 0 print banner
1364	/////////////////////////////////////////////////////////////////////////////////
1365
1366	if( (core_lid == 0) && (local_cxy == 0) ) // [FIXME]
1367	{
1368	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1369
1370	#if( DEBUG_KERNEL_INIT & 1 )
1371	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1372	" - thread descriptor : %d bytes\n"
1373	" - process descriptor : %d bytes\n"
1374	" - cluster manager : %d bytes\n"
1375	" - chdev descriptor : %d bytes\n"
1376	" - core descriptor : %d bytes\n"
1377	" - scheduler : %d bytes\n"
1378	" - rpc fifo : %d bytes\n"
1379	" - page descriptor : %d bytes\n"
1380	" - mapper root : %d bytes\n"
1381	" - ppm manager : %d bytes\n"
1382	" - kcm manager : %d bytes\n"
1383	" - khm manager : %d bytes\n"
1384	" - vmm manager : %d bytes\n"
1385	" - gpt root : %d bytes\n"
1386	" - list item : %d bytes\n"
1387	" - xlist item : %d bytes\n"
1388	" - spinlock : %d bytes\n"
1389	" - remote spinlock : %d bytes\n"
1390	" - rwlock : %d bytes\n"
1391	" - remote rwlock : %d bytes\n",
1392	sizeof( thread_t ),
1393	sizeof( process_t ),
1394	sizeof( cluster_t ),
1395	sizeof( chdev_t ),
1396	sizeof( core_t ),
1397	sizeof( scheduler_t ),
1398	sizeof( remote_fifo_t ),
1399	sizeof( page_t ),
1400	sizeof( mapper_t ),
1401	sizeof( ppm_t ),
1402	sizeof( kcm_t ),
1403	sizeof( khm_t ),
1404	sizeof( vmm_t ),
1405	sizeof( gpt_t ),
1406	sizeof( list_entry_t ),
1407	sizeof( xlist_entry_t ),
1408	sizeof( spinlock_t ),
1409	sizeof( remote_spinlock_t ),
1410	sizeof( rwlock_t ),
1411	sizeof( remote_rwlock_t ));
1412	#endif
1413
1414	}
1415
1416	// each core activates its private TICK IRQ
1417	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1418
1419	#if DEBUG_KERNEL_INIT
1420	printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1421	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1422	#endif
1423
1424	// each core jump to thread_idle_func
1425	thread_idle_func();
1426	}
1427

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