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source: trunk/kernel/kern/kernel_init.c @ 310

Last change on this file since 310 was 296, checked in by alain, 7 years ago
Several modifs in the generic scheduler and in the hal_context to fix the context switch mechanism.
File size: 53.6 KB

Line
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 <errno.h>
27	#include <hal_types.h>
28	#include <hal_special.h>
29	#include <hal_context.h>
30	#include <hal_irqmask.h>
31	#include <hal_ppm.h>
32	#include <barrier.h>
33	#include <remote_barrier.h>
34	#include <core.h>
35	#include <list.h>
36	#include <xlist.h>
37	#include <xhtab.h>
38	#include <thread.h>
39	#include <scheduler.h>
40	#include <kmem.h>
41	#include <cluster.h>
42	#include <string.h>
43	#include <memcpy.h>
44	#include <ppm.h>
45	#include <page.h>
46	#include <chdev.h>
47	#include <boot_info.h>
48	#include <dqdt.h>
49	#include <dev_mmc.h>
50	#include <dev_dma.h>
51	#include <dev_iob.h>
52	#include <dev_ioc.h>
53	#include <dev_txt.h>
54	#include <dev_pic.h>
55	#include <printk.h>
56	#include <vfs.h>
57	#include <devfs.h>
58	#include <mapper.h>
59
60	#define KERNEL_INIT_SYNCHRO 0xA5A5B5B5
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
88	__attribute__((section(".kdata")))
89	chdev_t txt0_chdev CONFIG_CACHE_LINE_ALIGNED;
90
91	// This variables define the kernel process0 descriptor
92	__attribute__((section(".kdata")))
93	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
94
95	// This variable defines extended pointers on the distributed chdevs
96	__attribute__((section(".kdata")))
97	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
98
99	// This variable contains the input IRQ indexes for the IOPIC controller
100	__attribute__((section(".kdata")))
101	iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
102
103	// This variable contains the input IRQ indexes for the LAPIC controller
104	__attribute__((section(".kdata")))
105	lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
106
107	// This variable defines the local cluster identifier
108	__attribute__((section(".kdata")))
109	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
110
111	// This variable is used for CP0 cores synchronisation in kernel_init()
112	__attribute__((section(".kdata")))
113	remote_barrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
114
115	// This variable is used for local cores synchronisation in kernel_init()
116	__attribute__((section(".kdata")))
117	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119	// This variable defines the array of supported File System contexts
120	__attribute__((section(".kdata")))
121	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
122
123
124	///////////////////////////////////////////////////////////////////////////////////////////
125	// This function displays the ALMOS_MKH banner.
126	///////////////////////////////////////////////////////////////////////////////////////////
127	static void print_banner( uint32_t nclusters , uint32_t ncores )
128	{
129	printk("\n"
130	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
131	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
132	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
133	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
134	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
135	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
136	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
137	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
138	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
139	"\n\n\t\t\t Version 0.0 : %d cluster(s) / %d core(s) per cluster\n\n", nclusters , ncores );
140	}
141
142
143	///////////////////////////////////////////////////////////////////////////////////////////
144	// This function initializes the TXT0 chdev descriptor, that is the "kernel terminal",
145	// shared by all kernel instances for debug messages.
146	// It is a global variable (replicated in all clusters), because this terminal is used
147	// before the kmem allocator initialisation, but only the instance in cluster containing
148	// the calling core is registered in the "chdev_dir" directory.
149	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
150	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
151	///////////////////////////////////////////////////////////////////////////////////////////
152	// @ info : pointer on the local boot-info structure.
153	///////////////////////////////////////////////////////////////////////////////////////////
154	static void txt0_device_init( boot_info_t * info )
155	{
156	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
157	uint32_t dev_nr; // actual number of devices in this cluster
158	xptr_t base; // remote pointer on segment base
159	uint32_t func; // device functional index
160	uint32_t impl; // device implementation index
161	uint32_t i; // device index in dev_tbl
162	uint32_t x; // X cluster coordinate
163	uint32_t y; // Y cluster coordinate
164	uint32_t channels; // number of channels
165
166	// get number of peripherals and base of devices array from boot_info
167	dev_nr = info->ext_dev_nr;
168	dev_tbl = info->ext_dev;
169
170	// loop on external peripherals to find TXT device
171	for( i = 0 ; i < dev_nr ; i++ )
172	{
173	base = dev_tbl[i].base;
174	func = FUNC_FROM_TYPE( dev_tbl[i].type );
175	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
176	channels = dev_tbl[i].channels;
177
178	if (func == DEV_FUNC_TXT )
179	{
180	assert( (channels > 0) , __FUNCTION__ ,
181	"numner of TXT channels cannot be 0\n");
182
183	// initializes TXT0 basic fields
184	txt0_chdev.func = func;
185	txt0_chdev.impl = impl;
186	txt0_chdev.channel = 0;
187	txt0_chdev.base = base;
188	txt0_chdev.is_rx = false;
189
190	// initializes lock
191	remote_spinlock_init( XPTR( local_cxy , &txt0_chdev.wait_lock ) );
192
193	// TXT specific initialisation:
194	// no server thread & no IRQ routing for channel 0
195	dev_txt_init( &txt0_chdev );
196
197	// register the TXT0 in all chdev_dir[x][y] structures
198	for( x = 0 ; x < info->x_size ; x++ )
199	{
200	for( y = 0 ; y < info->y_size ; y++ )
201	{
202	cxy_t cxy = (x<<info->y_width) + y;
203	hal_remote_swd( XPTR( cxy , &chdev_dir.txt[0] ) ,
204	XPTR( local_cxy , &txt0_chdev ) );
205	}
206	}
207
208	kinit_dmsg("\n[INFO] %s created TXT0 chdev in cluster %x at cycle %d\n",
209	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
210	}
211	} // end loop on devices
212	} // end txt0_device_init()
213
214	///////////////////////////////////////////////////////////////////////////////////////////
215	// This function allocates memory and initializes the chdev descriptors for the internal
216	// peripherals contained in the local cluster, other than the LAPIC, as specified by
217	// the boot_info, including the linking with the driver for the specified implementation.
218	// The relevant entries in all copies of the devices directory are initialised.
219	///////////////////////////////////////////////////////////////////////////////////////////
220	// @ info : pointer on the local boot-info structure.
221	///////////////////////////////////////////////////////////////////////////////////////////
222	static void internal_devices_init( boot_info_t * info )
223	{
224	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
225	uint32_t dev_nr; // actual number of devices in this cluster
226	xptr_t base; // remote pointer on segment base
227	uint32_t func; // device functionnal index
228	uint32_t impl; // device implementation index
229	uint32_t i; // device index in dev_tbl
230	uint32_t x; // X cluster coordinate
231	uint32_t y; // Y cluster coordinate
232	uint32_t channels; // number of channels
233	uint32_t channel; // channel index
234	chdev_t * chdev_ptr; // local pointer on created chdev
235
236	// get number of internal peripherals and base from boot_info
237	dev_nr = info->int_dev_nr;
238	dev_tbl = info->int_dev;
239
240	// loop on internal peripherals
241	for( i = 0 ; i < dev_nr ; i++ )
242	{
243	base = dev_tbl[i].base;
244	channels = dev_tbl[i].channels;
245	func = FUNC_FROM_TYPE( dev_tbl[i].type );
246	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
247
248	//////////////////////////
249	if( func == DEV_FUNC_MMC )
250	{
251	assert( (channels == 1) , __FUNCTION__ ,
252	"MMC device must be single channel\n" );
253
254	// create chdev in local cluster
255	chdev_ptr = chdev_create( func,
256	impl,
257	0, // channel
258	false, // direction
259	base );
260
261	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
262	"cannot allocate memory for MMC chdev\n" );
263
264	// make MMC specific initialisation
265	dev_mmc_init( chdev_ptr );
266
267	// set the MMC field in all chdev_dir[x][y] structures
268	for( x = 0 ; x < info->x_size ; x++ )
269	{
270	for( y = 0 ; y < info->y_size ; y++ )
271	{
272	cxy_t cxy = (x<<info->y_width) + y;
273	hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
274	XPTR( local_cxy , chdev_ptr ) );
275	}
276	}
277
278	kinit_dmsg("\n[INFO] %s created MMC in cluster %x / chdev = %x\n",
279	__FUNCTION__ , channel , local_cxy , chdev_ptr );
280	}
281	///////////////////////////////
282	else if( func == DEV_FUNC_DMA )
283	{
284	// create one chdev per channel in local cluster
285	for( channel = 0 ; channel < channels ; channel++ )
286	{
287	// create chdev[channel] in local cluster
288	chdev_ptr = chdev_create( func,
289	impl,
290	channel,
291	false, // direction
292	base );
293
294	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
295	"cannot allocate memory for DMA chdev" );
296
297	// make DMA specific initialisation
298	dev_dma_init( chdev_ptr );
299
300	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
301	// structure because the DMA device is not remotely accessible.
302	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
303
304	kinit_dmsg("\n[INFO] %s created DMA[%d] in cluster %x / chdev = %x\n",
305	__FUNCTION__ , channel , local_cxy , chdev_ptr );
306	}
307	}
308	}
309	} // end internal_devices_init()
310
311	///////////////////////////////////////////////////////////////////////////////////////////
312	// This function allocates memory and initializes the chdev descriptors for the
313	// external (shared) peripherals other than the IOPIC, as specified by the boot_info,
314	// including the dynamic linking with the driver for the specified implementation.
315	// These chdev descriptors are distributed on all clusters, using a modulo on a global
316	// index, identically computed in all clusters: In each cluster, the local CP0 core
317	// computes the global index for all external chdevs, and creates only the chdevs that
318	// must be placed in the local cluster.
319	// The relevant entries in all copies of the devices directory are initialised.
320	///////////////////////////////////////////////////////////////////////////////////////////
321	// @ info : pointer on the local boot-info structure.
322	///////////////////////////////////////////////////////////////////////////////////////////
323	static void external_devices_init( boot_info_t * info )
324	{
325	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
326	uint32_t dev_nr; // actual number of external devices
327	xptr_t base; // remote pointer on segment base
328	uint32_t func; // device functionnal index
329	uint32_t impl; // device implementation index
330	uint32_t i; // device index in dev_tbl
331	uint32_t x; // X cluster coordinate
332	uint32_t y; // Y cluster coordinate
333	uint32_t channels; // number of channels
334	uint32_t channel; // channel index
335	uint32_t directions; // number of directions (1 or 2)
336	uint32_t rx; // direction index (0 or 1)
337	uint32_t first_channel; // used in loop on channels for TXT
338	chdev_t * chdev; // local pointer on one channel_device descriptor
339	uint32_t ext_chdev_gid; // global index of external chdev
340
341	// get number of peripherals and base of devices array from boot_info
342	dev_nr = info->ext_dev_nr;
343	dev_tbl = info->ext_dev;
344
345	// initializes global index (PIC is already placed in cluster 0
346	ext_chdev_gid = 1;
347
348	// loop on external peripherals
349	for( i = 0 ; i < dev_nr ; i++ )
350	{
351	base = dev_tbl[i].base;
352	channels = dev_tbl[i].channels;
353	func = FUNC_FROM_TYPE( dev_tbl[i].type );
354	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
355
356	// There is one chdev per direction for NIC
357	if (func == DEV_FUNC_NIC) directions = 2;
358	else directions = 1;
359
360	// The TXT0 chdev has already been created
361	if (func == DEV_FUNC_TXT) first_channel = 1;
362	else first_channel = 0;
363
364	// do nothing for RO, that does not require a device descriptor.
365	if( func == DEV_FUNC_ROM ) continue;
366
367	// do nothing for PIC, that is already initialized
368	if( func == DEV_FUNC_PIC ) continue;
369
370	// check PIC device initialized
371	assert( (chdev_dir.pic != XPTR_NULL ) , __FUNCTION__ ,
372	"PIC device must be initialized before other devices\n" );
373
374	// check external device functionnal type
375	assert( ( (func == DEV_FUNC_IOB) \|\|
376	(func == DEV_FUNC_IOC) \|\|
377	(func == DEV_FUNC_TXT) \|\|
378	(func == DEV_FUNC_NIC) \|\|
379	(func == DEV_FUNC_FBF) ) , __FUNCTION__ ,
380	"undefined external peripheral type\n" );
381
382	// loops on channels
383	for( channel = first_channel ; channel < channels ; channel++ )
384	{
385	// loop on directions
386	for( rx = 0 ; rx < directions ; rx++ )
387	{
388	// compute target cluster for chdev[func,channel,direction]
389	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
390	uint32_t cx = offset / info->y_size;
391	uint32_t cy = offset % info->y_size;
392	uint32_t target_cxy = (cx<<info->y_width) + cy;
393
394	// allocate and initialize a local chdev
395	// if local cluster matches target cluster
396	if( target_cxy == local_cxy )
397	{
398	chdev = chdev_create( func,
399	impl,
400	channel,
401	rx, // direction
402	base );
403
404	assert( (chdev != NULL), __FUNCTION__ ,
405	"cannot allocate external device" );
406
407	// make device type specific initialisation
408	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
409	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
410	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
411	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
412	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
413
414	// all external (shared) devices are remotely accessible
415	// initialize the replicated chdev_dir[x][y] structures
416	// defining the extended pointers on chdev descriptors
417	xptr_t * entry;
418
419	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
420	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
421	if(func==DEV_FUNC_TXT ) entry = &chdev_dir.txt[channel];
422	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
423	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
424	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
425
426	for( x = 0 ; x < info->x_size ; x++ )
427	{
428	for( y = 0 ; y < info->y_size ; y++ )
429	{
430	cxy_t cxy = (x<<info->y_width) + y;
431	hal_remote_swd( XPTR( cxy , entry ),
432	XPTR( local_cxy , chdev ) );
433	}
434	}
435
436	kinit_dmsg("\n[INFO] %s create chdev %s[%d] in cluster %x / chdev = %x\n",
437	__FUNCTION__ , chdev_func_str( func ), channel , local_cxy , chdev );
438
439	} // end if match
440
441	// increment chdev global index (matching or not)
442	ext_chdev_gid++;
443
444	} // end loop on directions
445	} // end loop on channels
446	} // end loop on devices
447	} // end external_devices_init()
448
449	///////////////////////////////////////////////////////////////////////////////////////////
450	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
451	// device, namely the informations attached to the external IOPIC controller.
452	// This initialisation must be done before other devices initialisation because the IRQ
453	// routing infrastructure is required for internal and external devices initialisation.
454	///////////////////////////////////////////////////////////////////////////////////////////
455	// @ info : pointer on the local boot-info structure.
456	///////////////////////////////////////////////////////////////////////////////////////////
457	static void iopic_init( boot_info_t * info )
458	{
459	boot_device_t * dev_tbl; // pointer on boot_info external devices array
460	uint32_t dev_nr; // actual number of external devices
461	xptr_t base; // remote pointer on segment base
462	uint32_t func; // device functionnal index
463	uint32_t impl; // device implementation index
464	uint32_t i; // device index in dev_tbl
465	uint32_t x; // cluster X coordinate
466	uint32_t y; // cluster Y coordinate
467	bool_t found; // IOPIC found
468	chdev_t * chdev; // pointer on PIC chdev descriptor
469
470	// get number of external peripherals and base of array from boot_info
471	dev_nr = info->ext_dev_nr;
472	dev_tbl = info->ext_dev;
473
474	// loop on external peripherals to get the IOPIC
475	for( i = 0 , found = false ; i < dev_nr ; i++ )
476	{
477	func = FUNC_FROM_TYPE( dev_tbl[i].type );
478
479	if( func == DEV_FUNC_PIC )
480	{
481	base = dev_tbl[i].base;
482	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
483	found = true;
484	break;
485	}
486	}
487
488	assert( found , __FUNCTION__ , "PIC device not found\n" );
489
490	// allocate and initialize the PIC chdev in local cluster
491	chdev = chdev_create( func,
492	impl,
493	0, // channel
494	0, // direction,
495	base );
496
497	assert( (chdev != NULL), __FUNCTION__ , "no memory for PIC chdev\n" );
498
499	// make PIC device type specific initialisation
500	dev_pic_init( chdev );
501
502	// register extended pointer on PIC chdev in "chdev_dir" array in all clusters
503	xptr_t * entry = &chdev_dir.pic;
504
505	for( x = 0 ; x < info->x_size ; x++ )
506	{
507	for( y = 0 ; y < info->y_size ; y++ )
508	{
509	cxy_t cxy = (x<<info->y_width) + y;
510	hal_remote_swd( XPTR( cxy , entry ) ,
511	XPTR( local_cxy , chdev ) );
512	}
513	}
514
515	// initialize the "iopic_input" structure
516	// defining how external IRQs are connected to IOPIC
517	uint32_t id;
518	uint8_t valid;
519	uint32_t type;
520	uint8_t channel;
521	uint8_t is_rx;
522
523	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
524	{
525	valid = dev_tbl[i].irq[id].valid;
526	type = dev_tbl[i].irq[id].dev_type;
527	channel = dev_tbl[i].irq[id].channel;
528	is_rx = dev_tbl[i].irq[id].is_rx;
529
530	if( valid ) // only valid inputs are registered
531	{
532	uint32_t * index; // local pointer on one entry
533	uint16_t func = FUNC_FROM_TYPE( type );
534
535	if ( func == DEV_FUNC_TXT )
536	index = &iopic_input.txt[channel];
537	else if( func == DEV_FUNC_IOC )
538	index = &iopic_input.ioc[channel];
539	else if( (func == DEV_FUNC_NIC) && (is_rx == 0) )
540	index = &iopic_input.nic_tx[channel];
541	else if( (func == DEV_FUNC_NIC) && (is_rx != 0) )
542	index = &iopic_input.nic_rx[channel];
543	else if( func == DEV_FUNC_IOB )
544	index = &iopic_input.iob;
545	else
546	assert( false , __FUNCTION__ , "illegal source device for IOPIC input" );
547
548	// set entry in local structure
549	*index = id;
550	}
551	}
552
553	kinit_dmsg("\n[INFO] %s created PIC chdev in cluster %x at cycle %d\n",
554	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
555
556	} // end iopic_init()
557
558	///////////////////////////////////////////////////////////////////////////////////////////
559	// This function is called by all CP0s in all cluster to complete the PIC device
560	// initialisation, namely the informations attached to the LAPIC controller.
561	// This initialisation must be done after the IOPIC initialisation, but before other
562	// devices initialisation because the IRQ routing infrastructure is required for both
563	// internal and external devices initialisation.
564	///////////////////////////////////////////////////////////////////////////////////////////
565	// @ info : pointer on the local boot-info structure.
566	///////////////////////////////////////////////////////////////////////////////////////////
567	static void lapic_init( boot_info_t * info )
568	{
569	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
570	uint32_t dev_nr; // number of internal devices
571	uint32_t i; // device index in dev_tbl
572	xptr_t base; // remote pointer on segment base
573	uint32_t func; // device functionnal type in boot_info
574	bool_t found; // LAPIC found
575
576	// get number of internal peripherals and base
577	dev_nr = info->int_dev_nr;
578	dev_tbl = info->int_dev;
579
580	// loop on internal peripherals to get the lapic device
581	for( i = 0 , found = false ; i < dev_nr ; i++ )
582	{
583	func = FUNC_FROM_TYPE( dev_tbl[i].type );
584
585	if( func == DEV_FUNC_ICU )
586	{
587	base = dev_tbl[i].base;
588	found = true;
589	break;
590	}
591	}
592
593	// if the LAPIC controller is not defined in the boot_info,
594	// we simply don't initialize the PIC extensions in the kernel,
595	// making the assumption that the LAPIC related informations
596	// are hidden in the hardware specific PIC driver.
597	if( found )
598	{
599	// initialise the PIC extensions for
600	// the core descriptor and core manager extensions
601	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
602
603	// initialize the "lapic_input" structure
604	// defining how internal IRQs are connected to LAPIC
605	uint32_t id;
606	uint8_t valid;
607	uint8_t channel;
608	uint32_t func;
609
610	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
611	{
612	valid = dev_tbl[i].irq[id].valid;
613	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
614	channel = dev_tbl[i].irq[id].channel;
615
616	if( valid ) // only valid local IRQs are registered
617	{
618	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
619	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
620	else assert( false , __FUNCTION__ , "illegal source device for LAPIC input" );
621	}
622	}
623	}
624	} // end lapic_init()
625
626	///////////////////////////////////////////////////////////////////////////////////////////
627	// This static function returns the identifiers of the calling core.
628	///////////////////////////////////////////////////////////////////////////////////////////
629	// @ info : pointer on boot_info structure.
630	// @ lid : [out] core local index in cluster.
631	// @ cxy : [out] cluster identifier.
632	// @ lid : [out] core global identifier (hardware).
633	// @ return 0 if success / return EINVAL if not found.
634	///////////////////////////////////////////////////////////////////////////////////////////
635	static error_t get_core_identifiers( boot_info_t * info,
636	lid_t * lid,
637	cxy_t * cxy,
638	gid_t * gid )
639	{
640	uint32_t i;
641	gid_t global_id;
642
643	// get global identifier from hardware register
644	global_id = hal_get_gid();
645
646	// makes an associative search in boot_info to get (cxy,lid) from global_id
647	for( i = 0 ; i < info->cores_nr ; i++ )
648	{
649	if( global_id == info->core[i].gid )
650	{
651	*lid = info->core[i].lid;
652	*cxy = info->core[i].cxy;
653	*gid = global_id;
654	return 0;
655	}
656	}
657	return EINVAL;
658	}
659
660	////////////////////////////////////////////////////////////////////////////////////////////
661	// This function display on TXT0 the content of the external chdev directory,
662	// in the local cluster.
663	////////////////////////////////////////////////////////////////////////////////////////////
664	static void chdev_dir_display( )
665	{
666	cxy_t iob_cxy = GET_CXY( chdev_dir.iob );
667	chdev_t * iob_ptr = (chdev_t *)GET_PTR( chdev_dir.iob );
668	xptr_t iob_base = hal_remote_lwd( XPTR( iob_cxy , &iob_ptr->base ) );
669
670	cxy_t pic_cxy = GET_CXY( chdev_dir.pic );
671	chdev_t * pic_ptr = (chdev_t *)GET_PTR( chdev_dir.pic );
672	xptr_t pic_base = hal_remote_lwd( XPTR( pic_cxy , &pic_ptr->base ) );
673
674	cxy_t txt0_cxy = GET_CXY( chdev_dir.txt[0] );
675	chdev_t * txt0_ptr = (chdev_t *)GET_PTR( chdev_dir.txt[0] );
676	xptr_t txt0_base = hal_remote_lwd( XPTR( txt0_cxy , &txt0_ptr->base ) );
677
678	cxy_t txt1_cxy = GET_CXY( chdev_dir.txt[1] );
679	chdev_t * txt1_ptr = (chdev_t *)GET_PTR( chdev_dir.txt[1] );
680	xptr_t txt1_base = hal_remote_lwd( XPTR( txt1_cxy , &txt1_ptr->base ) );
681
682	cxy_t txt2_cxy = GET_CXY( chdev_dir.txt[2] );
683	chdev_t * txt2_ptr = (chdev_t *)GET_PTR( chdev_dir.txt[2] );
684	xptr_t txt2_base = hal_remote_lwd( XPTR( txt2_cxy , &txt2_ptr->base ) );
685
686	cxy_t ioc_cxy = GET_CXY( chdev_dir.ioc[0] );
687	chdev_t * ioc_ptr = (chdev_t *)GET_PTR( chdev_dir.ioc[0] );
688	xptr_t ioc_base = hal_remote_lwd( XPTR( ioc_cxy , &ioc_ptr->base ) );
689
690	cxy_t fbf_cxy = GET_CXY( chdev_dir.fbf[0] );
691	chdev_t * fbf_ptr = (chdev_t *)GET_PTR( chdev_dir.fbf[0] );
692	xptr_t fbf_base = hal_remote_lwd( XPTR( fbf_cxy , &fbf_ptr->base ) );
693
694	cxy_t nic_rx_cxy = GET_CXY( chdev_dir.nic_rx[0] );
695	chdev_t * nic_rx_ptr = (chdev_t *)GET_PTR( chdev_dir.nic_rx[0] );
696	xptr_t nic_rx_base = hal_remote_lwd( XPTR( nic_rx_cxy , &nic_rx_ptr->base ) );
697
698	cxy_t nic_tx_cxy = GET_CXY( chdev_dir.nic_tx[0] );
699	chdev_t * nic_tx_ptr = (chdev_t *)GET_PTR( chdev_dir.nic_tx[0] );
700	xptr_t nic_tx_base = hal_remote_lwd( XPTR( nic_tx_cxy , &nic_tx_ptr->base ) );
701
702	printk("\n*** external chdev directory in cluster %x\n"
703	" - iob = %l / base = %l\n"
704	" - pic = %l / base = %l\n"
705	" - txt[0] = %l / base = %l\n"
706	" - txt[1] = %l / base = %l\n"
707	" - txt[2] = %l / base = %l\n"
708	" - ioc[0] = %l / base = %l\n"
709	" - fbf[0] = %l / base = %l\n"
710	" - nic_rx[0] = %l / base = %l\n"
711	" - nic_tx[0] = %l / base = %l\n",
712	local_cxy,
713	chdev_dir.iob, iob_base,
714	chdev_dir.pic, pic_base,
715	chdev_dir.txt[0], txt0_base,
716	chdev_dir.txt[1], txt1_base,
717	chdev_dir.txt[2], txt2_base,
718	chdev_dir.ioc[0], ioc_base,
719	chdev_dir.fbf[0], fbf_base,
720	chdev_dir.nic_rx[0], nic_rx_base,
721	chdev_dir.nic_tx[0], nic_tx_base );
722	}
723
724	///////////////////////////////////////////////////////////////////////////////////////////
725	// This function is the entry point for the kernel initialisation.
726	// It is executed by all cores in all clusters, but only core[0], called CP0,
727	// initializes the shared resources such as the cluster manager, or the local peripherals.
728	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
729	// only information contained in the local boot_info_t structure, set by the bootloader.
730	// Only CP0 in cluster 0 print the log messages.
731	///////////////////////////////////////////////////////////////////////////////////////////
732	// @ info : pointer on the local boot-info structure.
733	///////////////////////////////////////////////////////////////////////////////////////////
734	void kernel_init( boot_info_t * info )
735	{
736	lid_t core_lid = -1; // running core local index
737	cxy_t core_cxy = -1; // running core cluster identifier
738	gid_t core_gid; // running core hardware identifier
739	cluster_t * cluster; // pointer on local cluster manager
740	core_t * core; // pointer on running core descriptor
741	thread_t * thread; // pointer on idle thread descriptor
742
743	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
744	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
745	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
746	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
747
748	error_t error;
749	reg_t status; // running core status register
750
751	cxy_t io_cxy = info->io_cxy;
752
753	/////////////////////////////////////////////////////////////////////////////////
754	// STEP 0 : Each core get its core identifier from boot_info, and makes
755	// a partial initialisation of its private idle thread descriptor.
756	// CP0 initializes the "local_cxy" global variable.
757	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
758	/////////////////////////////////////////////////////////////////////////////////
759
760	error = get_core_identifiers( info,
761	&core_lid,
762	&core_cxy,
763	&core_gid );
764
765	// CP0 initializes cluster identifier
766	if( core_lid == 0 ) local_cxy = info->cxy;
767
768	// each core gets a pointer on its private idle thread descriptor
769	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
770
771	// each core registers this thread pointer in hardware register
772	hal_set_current_thread( thread );
773
774	// each core initializes the idle thread "locks_root" and "xlocks_root" fields
775	list_root_init( &thread->locks_root );
776	xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) );
777
778	// CP0 in I/O cluster initialises TXT0 chdev descriptor
779	if( (core_lid == 0) && (core_cxy == io_cxy) ) txt0_device_init( info );
780
781	/////////////////////////////////////////////////////////////////////////////////
782	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
783	(info->x_size * info->y_size) );
784	barrier_wait( &local_barrier , info->cores_nr );
785
786	if( (core_lid == 0) && (local_cxy == 0) )
787	kinit_dmsg("\n[INFO] %s : exit barrier 0 : TXT0 initialized / cycle %d\n",
788	__FUNCTION__, hal_time_stamp() );
789
790	/////////////////////////////////////////////////////////////////////////////
791	// STEP 1 : all cores check its core identifier.
792	// CP0 initializes the local cluster manager.
793	// This includes the memory allocators.
794	/////////////////////////////////////////////////////////////////////////////
795
796	// all cores check identifiers
797	if( error )
798	{
799	printk("\n[PANIC] in %s : illegal core identifiers"
800	" gid = %x / cxy = %x / lid = %d\n",
801	__FUNCTION__ , core_lid , core_cxy , core_lid );
802	hal_core_sleep();
803	}
804
805	// CP0 initializes cluster manager
806	if( core_lid == 0 )
807	{
808	error = cluster_init( info );
809
810	if( error )
811	{
812	printk("\n[PANIC] in %s : cannot initialise cluster %x",
813	__FUNCTION__ , local_cxy );
814	hal_core_sleep();
815	}
816	}
817
818	/////////////////////////////////////////////////////////////////////////////////
819	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
820	(info->x_size * info->y_size) );
821	barrier_wait( &local_barrier , info->cores_nr );
822	/////////////////////////////////////////////////////////////////////////////////
823
824	if( (core_lid == 0) && (local_cxy == 0) )
825	kinit_dmsg("\n[INFO] %s : exit barrier 1 : clusters initialised / cycle %d\n",
826	__FUNCTION__, hal_time_stamp() );
827
828	/////////////////////////////////////////////////////////////////////////////////
829	// STEP 2 : all CP0s initialize the process_zero descriptor.
830	// CP0 in cluster 0 initializes the IOPIC device.
831	/////////////////////////////////////////////////////////////////////////////////
832
833	// all cores get pointer on local cluster manager & core descriptor
834	cluster = &cluster_manager;
835	core = &cluster->core_tbl[core_lid];
836
837	// all CP0s initialize the process_zero descriptor
838	if( core_lid == 0 ) process_reference_init( &process_zero , 0 , XPTR_NULL );
839
840	// CP0 in cluster 0 initializes the PIC chdev,
841	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
842
843	////////////////////////////////////////////////////////////////////////////////
844	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
845	(info->x_size * info->y_size) );
846	barrier_wait( &local_barrier , info->cores_nr );
847	////////////////////////////////////////////////////////////////////////////////
848
849	if( (core_lid == 0) && (local_cxy == 0) )
850	kinit_dmsg("\n[INFO] %s : exit barrier 2 : PIC initialised / cycle %d\n",
851	__FUNCTION__, hal_time_stamp() );
852
853	////////////////////////////////////////////////////////////////////////////////
854	// STEP 3 : all CP0s initialize the distibuted LAPIC descriptor.
855	// all CP0s initialize the internal chdev descriptors
856	// all CP0s initialize the local external chdev descriptors
857	////////////////////////////////////////////////////////////////////////////////
858
859	// all CP0s initialize their local LAPIC extension,
860	if( core_lid == 0 ) lapic_init( info );
861
862	// CP0 scan the internal (private) peripherals,
863	// and allocates memory for the corresponding chdev descriptors.
864	if( core_lid == 0 ) internal_devices_init( info );
865
866
867	// All CP0s contribute to initialise external peripheral chdev descriptors.
868	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
869	// and allocates memory for the chdev descriptors that must be placed
870	// on the (cxy) cluster according to the global index value.
871
872	if( core_lid == 0 ) external_devices_init( info );
873
874	/////////////////////////////////////////////////////////////////////////////////
875	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
876	(info->x_size * info->y_size) );
877	barrier_wait( &local_barrier , info->cores_nr );
878	/////////////////////////////////////////////////////////////////////////////////
879
880	if( (core_lid == 0) && (local_cxy == 0) )
881	kinit_dmsg("\n[INFO] %s : exit barrier 3 : all chdev initialised / cycle %d\n",
882	__FUNCTION__, hal_time_stamp());
883
884	/////////////////////////////////////////////////////////////////////////////////
885	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
886	// All cores initialise specific core registers
887	// Alh cores initialize IDLE thread.
888	// Only CP0 in cluster 0 creates the VFS root inode.
889	// It access the boot device to initialize the file system context.
890	/////////////////////////////////////////////////////////////////////////////////
891
892	if( CONFIG_KINIT_DEBUG ) chdev_dir_display();
893
894	// All cores enable the shared IPI channel
895	dev_pic_enable_ipi();
896	hal_enable_irq( &status );
897
898	// All cores initialize specific core registers
899	hal_core_init( info );
900
901	kinit_dmsg("\n[INFO] %s : IRQs enabled for core[%x,%d] / SR = %x\n",
902	__FUNCTION__ , local_cxy , core_lid , hal_get_sr() );
903
904	// all cores initialize the idle thread descriptor
905	error = thread_kernel_init( thread,
906	THREAD_IDLE,
907	&thread_idle_func,
908	NULL,
909	core_lid );
910	if( error )
911	{
912	printk("\n[PANIC] in %s : core[%x][%d] cannot initialize idle thread\n",
913	__FUNCTION__ , local_cxy , core_lid );
914	hal_core_sleep();
915	}
916
917	// all cores unblock idle thread, and register it in scheduler
918	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
919	core->scheduler.idle = thread;
920
921	if( (core_lid == 0) && (local_cxy == 0) )
922	{
923	kinit_dmsg("\n[INFO] %s : initialized idle thread %x on core[%x,%d] / cycle %d\n",
924	__FUNCTION__ , thread->trdid , local_cxy, core_lid, (uint32_t)hal_time_stamp());
925	}
926
927	#if CONFIG_KINIT_DEBUG
928	sched_display();
929	#endif
930
931	// CPO in cluster 0 creates the VFS root
932	if( (core_lid == 0) && (local_cxy == 0 ) )
933	{
934	vfs_root_inode_xp = XPTR_NULL;
935
936	// File System must be FATFS in this implementation,
937	// but other File System can be introduced here
938	if( CONFIG_VFS_ROOT_IS_FATFS )
939	{
940	// 1. create FATFS context in cluster 0
941	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
942
943	assert( (fatfs_ctx != NULL) , __FUNCTION__ ,
944	"cannot create FATFS context in cluster 0\n" );
945
946	// 2. access boot device to initialize FATFS context
947	fatfs_ctx_init( fatfs_ctx );
948
949	// 3. get various informations from FATFS context
950	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
951	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
952	fatfs_ctx->sectors_per_cluster;
953	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
954
955	// 4. create VFS root inode in cluster 0
956	error = vfs_inode_create( XPTR_NULL, // dentry_xp
957	FS_TYPE_FATFS, // fs_type
958	INODE_TYPE_DIR, // inode_type
959	(void *)(intptr_t)root_dir_cluster, // extend
960	0, // attr
961	0, // rights
962	0, // uid
963	0, // gid
964	&vfs_root_inode_xp ); // return
965
966	assert( (error == 0) , __FUNCTION__ ,
967	"cannot create VFS root inode\n" );
968
969	// 5. initialize VFS context for FAT in cluster 0
970	vfs_ctx_init( FS_TYPE_FATFS, // file system type
971	0, // attributes
972	total_clusters,
973	cluster_size,
974	vfs_root_inode_xp, // VFS root
975	fatfs_ctx ); // extend
976	}
977	else
978	{
979	printk("\n[PANIC] in %s : root FS must be FATFS\n", __FUNCTION__ );
980	hal_core_sleep();
981	}
982
983	// register VFS root inode in process_zero
984	process_zero.vfs_root_xp = vfs_root_inode_xp;
985	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
986	}
987
988	/////////////////////////////////////////////////////////////////////////////////
989	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
990	(info->x_size * info->y_size) );
991	barrier_wait( &local_barrier , info->cores_nr );
992	/////////////////////////////////////////////////////////////////////////////////
993
994	if( (core_lid == 0) && (local_cxy == 0) )
995	kinit_dmsg("\n[INFO] %s : exit barrier 4 : VFS_root = %l in cluster 0 / cycle %d\n",
996	__FUNCTION__, vfs_root_inode_xp , hal_time_stamp());
997
998	/////////////////////////////////////////////////////////////////////////////////
999	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1000	// and initialise both the local FS context and the local VFS context
1001	// from values stored in cluster 0.
1002	// They get the VFS root inode extended pointer from cluster 0.
1003	/////////////////////////////////////////////////////////////////////////////////
1004
1005	if( (core_lid == 0) && (local_cxy != 0) )
1006	{
1007	// File System must be FATFS in this implementation,
1008	// but other File System can be introduced here
1009	if( CONFIG_VFS_ROOT_IS_FATFS )
1010	{
1011	// allocate memory for FATFS context
1012	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1013
1014	assert( (fatfs_ctx != NULL) , __FUNCTION__ , "cannot create FATFS context\n" );
1015
1016	// get local pointer on VFS context for FATFS
1017	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1018
1019	// copy VFS context from cluster 0 to local cluster
1020	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1021	XPTR( 0 , vfs_ctx ),
1022	sizeof(vfs_ctx_t) );
1023
1024	// copy FATFS context from cluster 0 to local cluster
1025	hal_remote_memcpy( XPTR( local_cxy , fatfs_ctx ),
1026	XPTR( 0 , fatfs_ctx ),
1027	sizeof(fatfs_ctx_t) );
1028
1029	// update extend field in local copy of VFS context
1030	vfs_ctx->extend = fatfs_ctx;
1031	}
1032
1033	// get extended pointer on VFS root inode from cluster 0
1034	vfs_root_inode_xp = hal_remote_lwd( XPTR( 0 , &process_zero.vfs_root_xp ) );
1035
1036	// update local process_zero descriptor
1037	process_zero.vfs_root_xp = vfs_root_inode_xp;
1038	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1039	}
1040
1041	/////////////////////////////////////////////////////////////////////////////////
1042	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
1043	(info->x_size * info->y_size) );
1044	barrier_wait( &local_barrier , info->cores_nr );
1045	/////////////////////////////////////////////////////////////////////////////////
1046
1047	if( (core_lid == 0) && (local_cxy == io_cxy) )
1048	kinit_dmsg("\n[INFO] %s : exit barrier 5 : VFS_root = %l in cluster IO / cycle %d\n",
1049	__FUNCTION__, vfs_root_inode_xp , hal_time_stamp() );
1050
1051	/////////////////////////////////////////////////////////////////////////////////
1052	// STEP 6 : CP0 in cluster IO makes the global DEVFS tree initialisation:
1053	// It creates the DEVFS directory "dev", and the DEVFS "external"
1054	// directory in cluster IO and mount these inodes into VFS.
1055	/////////////////////////////////////////////////////////////////////////////////
1056
1057	if( (core_lid == 0) && (local_cxy == io_cxy) )
1058	{
1059	// create "dev" and "external" directories.
1060	devfs_global_init( process_zero.vfs_root_xp,
1061	&devfs_dev_inode_xp,
1062	&devfs_external_inode_xp );
1063
1064	// creates the DEVFS context in cluster IO
1065	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1066
1067	assert( (devfs_ctx != NULL) , __FUNCTION__ ,
1068	"cannot create DEVFS context in cluster IO\n");
1069
1070	// register DEVFS root and external directories
1071	devfs_ctx_init( devfs_ctx, devfs_dev_inode_xp, devfs_external_inode_xp );
1072	}
1073
1074	/////////////////////////////////////////////////////////////////////////////////
1075	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
1076	(info->x_size * info->y_size) );
1077	barrier_wait( &local_barrier , info->cores_nr );
1078	/////////////////////////////////////////////////////////////////////////////////
1079
1080	if( (core_lid == 0) && (local_cxy == io_cxy) )
1081	kinit_dmsg("\n[INFO] %s : exit barrier 6 : dev_root = %l in cluster IO / cycle %d\n",
1082	__FUNCTION__, devfs_dev_inode_xp , hal_time_stamp() );
1083
1084	/////////////////////////////////////////////////////////////////////////////////
1085	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1086	// Each CP0 get the "dev" and "external" extended pointers from
1087	// values stored in cluster IO.
1088	// Then CP0 in cluster(i) creates the DEVFS "internal directory,
1089	// and creates the pseudo-files for all chdevs in cluster (i).
1090	/////////////////////////////////////////////////////////////////////////////////
1091
1092	if( core_lid == 0 )
1093	{
1094	// get extended pointer on "extend" field of VFS context for DEVFS in cluster IO
1095	xptr_t extend_xp = XPTR( io_cxy , &fs_context[FS_TYPE_DEVFS].extend );
1096
1097	// get pointer on DEVFS context in cluster IO
1098	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1099
1100	devfs_dev_inode_xp = hal_remote_lwd( XPTR( io_cxy ,
1101	&devfs_ctx->dev_inode_xp ) );
1102	devfs_external_inode_xp = hal_remote_lwd( XPTR( io_cxy ,
1103	&devfs_ctx->external_inode_xp ) );
1104
1105	// populate DEVFS in all clusters
1106	devfs_local_init( devfs_dev_inode_xp,
1107	devfs_external_inode_xp,
1108	&devfs_internal_inode_xp );
1109	}
1110
1111	/////////////////////////////////////////////////////////////////////////////////
1112	if( core_lid == 0 ) remote_barrier( XPTR( io_cxy , &global_barrier ),
1113	(info->x_size * info->y_size) );
1114	barrier_wait( &local_barrier , info->cores_nr );
1115	/////////////////////////////////////////////////////////////////////////////////
1116
1117	if( (core_lid == 0) && (local_cxy == 0) )
1118	kinit_dmsg("\n[INFO] %s : exit barrier 7 : dev_root = %l in cluster 0 / cycle %d\n",
1119	__FUNCTION__, devfs_dev_inode_xp , hal_time_stamp() );
1120
1121	#if CONFIG_KINIT_DEBUG
1122	vfs_display( vfs_root_inode_xp );
1123	#endif
1124
1125	/////////////////////////////////////////////////////////////////////////////////
1126	// STEP 8 : CP0 in I/O cluster creates the first user process (process_init)
1127	/////////////////////////////////////////////////////////////////////////////////
1128
1129	if( (core_lid == 0) && (local_cxy == io_cxy) )
1130	{
1131	process_init_create();
1132	}
1133
1134	/////////////////////////////////////////////////////////////////////////////////
1135	if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
1136	(info->x_size * info->y_size) );
1137	barrier_wait( &local_barrier , info->cores_nr );
1138	/////////////////////////////////////////////////////////////////////////////////
1139
1140	if( (core_lid == 0) && (local_cxy == 0) )
1141	kinit_dmsg("\n[INFO] %s : exit barrier 8 : process init created / cycle %d\n",
1142	__FUNCTION__ , hal_time_stamp() );
1143
1144	/////////////////////////////////////////////////////////////////////////////////
1145	// STEP 9 : CP0 in cluster 0 print banner
1146	/////////////////////////////////////////////////////////////////////////////////
1147
1148	if( (core_lid == 0) && (local_cxy == io_cxy) )
1149	{
1150	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1151
1152	kinit_dmsg("\n\n* memory fooprint for main kernet objects *\n\n"
1153	" - thread descriptor : %d bytes\n"
1154	" - process descriptor : %d bytes\n"
1155	" - cluster manager : %d bytes\n"
1156	" - chdev descriptor : %d bytes\n"
1157	" - core descriptor : %d bytes\n"
1158	" - scheduler : %d bytes\n"
1159	" - rpc fifo : %d bytes\n"
1160	" - page descriptor : %d bytes\n"
1161	" - mapper root : %d bytes\n"
1162	" - ppm manager : %d bytes\n"
1163	" - kcm manager : %d bytes\n"
1164	" - khm manager : %d bytes\n"
1165	" - vmm manager : %d bytes\n"
1166	" - gpt root : %d bytes\n"
1167	" - list item : %d bytes\n"
1168	" - xlist item : %d bytes\n"
1169	" - spinlock : %d bytes\n"
1170	" - remote spinlock : %d bytes\n"
1171	" - rwlock : %d bytes\n"
1172	" - remote rwlock : %d bytes\n",
1173	sizeof( thread_t ),
1174	sizeof( process_t ),
1175	sizeof( cluster_t ),
1176	sizeof( chdev_t ),
1177	sizeof( core_t ),
1178	sizeof( scheduler_t ),
1179	sizeof( rpc_fifo_t ),
1180	sizeof( page_t ),
1181	sizeof( mapper_t ),
1182	sizeof( ppm_t ),
1183	sizeof( kcm_t ),
1184	sizeof( khm_t ),
1185	sizeof( vmm_t ),
1186	sizeof( gpt_t ),
1187	sizeof( list_entry_t ),
1188	sizeof( xlist_entry_t ),
1189	sizeof( spinlock_t ),
1190	sizeof( remote_spinlock_t ),
1191	sizeof( rwlock_t ),
1192	sizeof( remote_rwlock_t ));
1193	}
1194
1195	// each core activates its private TICK IRQ
1196	dev_pic_enable_timer( CONFIG_SCHED_TICK_PERIOD );
1197
1198	// each core jump to idle thread
1199	thread_idle_func();
1200	}
1201

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