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source: trunk/kernel/kern/kernel_init.c @ 535

Last change on this file since 535 was 535, checked in by nicolas.van.phan@…, 7 years ago
Replace TXT0 by MTTY0 for LETI
File size: 56.0 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_kernel_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 <remote_fifo.h>
35	#include <core.h>
36	#include <list.h>
37	#include <xlist.h>
38	#include <xhtab.h>
39	#include <thread.h>
40	#include <scheduler.h>
41	#include <kmem.h>
42	#include <cluster.h>
43	#include <string.h>
44	#include <memcpy.h>
45	#include <ppm.h>
46	#include <page.h>
47	#include <chdev.h>
48	#include <boot_info.h>
49	#include <dqdt.h>
50	#include <dev_mmc.h>
51	#include <dev_dma.h>
52	#include <dev_iob.h>
53	#include <dev_ioc.h>
54	#include <dev_txt.h>
55	#include <dev_pic.h>
56	#include <printk.h>
57	#include <vfs.h>
58	#include <devfs.h>
59	#include <mapper.h>
60
61	///////////////////////////////////////////////////////////////////////////////////////////
62	// All the following global variables are replicated in all clusters.
63	// They are initialised by the kernel_init() function.
64	//
65	// WARNING : The section names have been defined to control the base addresses of the
66	// boot_info structure and the idle thread descriptors, through the kernel.ld script:
67	// - the boot_info structure is built by the bootloader, and used by kernel_init.
68	// it must be the first object in the kdata segment.
69	// - the array of idle threads descriptors must be placed on the first page boundary after
70	// the boot_info structure in the kdata segment.
71	///////////////////////////////////////////////////////////////////////////////////////////
72
73	// This variable defines the local boot_info structure
74	__attribute__((section(".kinfo")))
75	boot_info_t boot_info;
76
77	// This variable defines the "idle" threads descriptors array
78	__attribute__((section(".kidle")))
79	char idle_threads[CONFIG_THREAD_DESC_SIZE *
80	CONFIG_MAX_LOCAL_CORES] CONFIG_PPM_PAGE_ALIGNED;
81
82	// This variable defines the local cluster manager
83	__attribute__((section(".kdata")))
84	cluster_t cluster_manager CONFIG_CACHE_LINE_ALIGNED;
85
86	// This variable defines the TXT0 kernel terminal (TX only)
87	__attribute__((section(".kdata")))
88	chdev_t txt0_chdev CONFIG_CACHE_LINE_ALIGNED;
89
90	// This variables define the kernel process0 descriptor
91	__attribute__((section(".kdata")))
92	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
93
94	// This variable defines extended pointers on the distributed chdevs
95	__attribute__((section(".kdata")))
96	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
97
98	// This variable contains the input IRQ indexes for the IOPIC controller
99	__attribute__((section(".kdata")))
100	iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
101
102	// This variable contains the input IRQ indexes for the LAPIC controller
103	__attribute__((section(".kdata")))
104	lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
105
106	// This variable defines the local cluster identifier
107	__attribute__((section(".kdata")))
108	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
109
110	// This variable is used for CP0 cores synchronisation in kernel_init()
111	__attribute__((section(".kdata")))
112	remote_barrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
113
114	// This variable is used for local cores synchronisation in kernel_init()
115	__attribute__((section(".kdata")))
116	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
117
118	// This variable defines the array of supported File System contexts
119	__attribute__((section(".kdata")))
120	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
121
122	// kernel_init is the entry point defined in hal/tsar_mips32/kernel.ld
123	// It will be used by the bootloader.
124	extern void kernel_init( boot_info_t * info );
125
126	// these debug variables are used to analyse the sys_read() syscall timing
127
128	#if DEBUG_SYS_READ
129	uint32_t enter_sys_read;
130	uint32_t exit_sys_read;
131
132	uint32_t enter_devfs_read;
133	uint32_t exit_devfs_read;
134
135	uint32_t enter_txt_read;
136	uint32_t exit_txt_read;
137
138	uint32_t enter_chdev_cmd_read;
139	uint32_t exit_chdev_cmd_read;
140
141	uint32_t enter_chdev_server_read;
142	uint32_t exit_chdev_server_read;
143
144	uint32_t enter_tty_cmd_read;
145	uint32_t exit_tty_cmd_read;
146
147	uint32_t enter_tty_isr_read;
148	uint32_t exit_tty_isr_read;
149	#endif
150
151	// these debug variables are used to analyse the sys_write() syscall timing
152
153	#if DEBUG_SYS_WRITE
154	uint32_t enter_sys_write;
155	uint32_t exit_sys_write;
156
157	uint32_t enter_devfs_write;
158	uint32_t exit_devfs_write;
159
160	uint32_t enter_txt_write;
161	uint32_t exit_txt_write;
162
163	uint32_t enter_chdev_cmd_write;
164	uint32_t exit_chdev_cmd_write;
165
166	uint32_t enter_chdev_server_write;
167	uint32_t exit_chdev_server_write;
168
169	uint32_t enter_tty_cmd_write;
170	uint32_t exit_tty_cmd_write;
171
172	uint32_t enter_tty_isr_write;
173	uint32_t exit_tty_isr_write;
174	#endif
175
176	///////////////////////////////////////////////////////////////////////////////////////////
177	// This function displays the ALMOS_MKH banner.
178	///////////////////////////////////////////////////////////////////////////////////////////
179	static void print_banner( uint32_t nclusters , uint32_t ncores )
180	{
181	printk("\n"
182	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
183	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
184	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
185	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
186	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
187	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
188	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
189	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
190	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
191	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
192	CONFIG_ALMOS_VERSION , nclusters , ncores );
193	}
194
195
196	///////////////////////////////////////////////////////////////////////////////////////////
197	// This function initializes the TXT0 chdev descriptor, that is the "kernel terminal",
198	// shared by all kernel instances for debug messages.
199	// It is a global variable (replicated in all clusters), because this terminal is used
200	// before the kmem allocator initialisation, but only the instance in cluster containing
201	// the calling core is registered in the "chdev_dir" directory.
202	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
203	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
204	///////////////////////////////////////////////////////////////////////////////////////////
205	// @ info : pointer on the local boot-info structure.
206	///////////////////////////////////////////////////////////////////////////////////////////
207	static void txt0_device_init( boot_info_t * info )
208	{
209	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
210	uint32_t dev_nr; // actual number of devices in this cluster
211	xptr_t base; // remote pointer on segment base
212	uint32_t func; // device functional index
213	uint32_t impl; // device implementation index
214	uint32_t i; // device index in dev_tbl
215	uint32_t x; // X cluster coordinate
216	uint32_t y; // Y cluster coordinate
217	uint32_t channels; // number of channels
218
219	// get number of peripherals and base of devices array from boot_info
220	dev_nr = info->ext_dev_nr;
221	dev_tbl = info->ext_dev;
222
223	// loop on external peripherals to find TXT device
224	for( i = 0 ; i < dev_nr ; i++ )
225	{
226	base = dev_tbl[i].base;
227	func = FUNC_FROM_TYPE( dev_tbl[i].type );
228	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
229	channels = dev_tbl[i].channels;
230
231	if (func == DEV_FUNC_TXT )
232	{
233	assert( (channels > 0) , "number of TXT channels cannot be 0\n");
234
235	// initializes TXT_TX[0] chdev
236	txt0_chdev.func = func;
237	txt0_chdev.impl = impl;
238	txt0_chdev.channel = 0;
239	txt0_chdev.base = base;
240	txt0_chdev.is_rx = false;
241
242	// initializes lock
243	remote_spinlock_init( XPTR( local_cxy , &txt0_chdev.wait_lock ) );
244
245	// TXT specific initialisation:
246	// no server thread & no IRQ routing for channel 0
247	dev_txt_init( &txt0_chdev );
248
249	// register the TXT0 in all chdev_dir[x][y] structures
250	for( x = 0 ; x < info->x_size ; x++ )
251	{
252	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
253	{
254	cxy_t cxy = (x<<info->y_width) + y;
255	hal_remote_swd( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
256	XPTR( local_cxy , &txt0_chdev ) );
257	}
258	}
259	}
260	} // end loop on devices
261	} // end txt0_device_init()
262
263	///////////////////////////////////////////////////////////////////////////////////////////
264	// This function is the same as txt0_device_init() but uses the internal multi_tty device
265	// attached to cluster (0,0) instead of the external tty_tsar.
266	// This function is used instead of txt0_device_init() only for TSAR LETI.
267	///////////////////////////////////////////////////////////////////////////////////////////
268	// @ info : pointer on the local boot-info structure.
269	///////////////////////////////////////////////////////////////////////////////////////////
270	static void mtty0_device_init( boot_info_t * info)
271	{
272	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
273	uint32_t dev_nr; // actual number of devices in this cluster
274	xptr_t base; // remote pointer on segment base
275	uint32_t func; // device functional index
276	uint32_t impl; // device implementation index
277	uint32_t i; // device index in dev_tbl
278	uint32_t x; // X cluster coordinate
279	uint32_t y; // Y cluster coordinate
280
281	dev_nr = info->int_dev_nr;
282	dev_tbl = info->int_dev;
283
284	// Loop on internal peripherals of cluster (0,0) to find MTY0
285	for ( i = 0; i < dev_nr; i++ )
286	{
287	base = dev_tbl[i].base;
288	func = FUNC_FROM_TYPE( dev_tbl[i].type );
289	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
290
291	if ( func == DEV_FUNC_TXT )
292	{
293	txt0_chdev.func = func;
294	txt0_chdev.impl = impl;
295	txt0_chdev.channel = 0;
296	txt0_chdev.base = base;
297	txt0_chdev.is_rx = false;
298
299	// Initialize MTY0 chdev lock
300	remote_spinlock_init( XPTR( local_cxy, &txt0_chdev.wait_lock ) );
301
302	// MTY specific initialization
303	dev_txt_init( &txt0_chdev );
304
305	// register the MTY in all chdev_dir[x][y] structures
306	for( x = 0 ; x < info->x_size ; x++ )
307	{
308	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
309	{
310	cxy_t cxy = (x<<info->y_width) + y;
311	hal_remote_swd( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
312	XPTR( local_cxy , &txt0_chdev ) );
313	}
314	}
315	}
316	} // end loop on internal devices
317	} // end mty0_device_init()
318
319	///////////////////////////////////////////////////////////////////////////////////////////
320	// This function allocates memory and initializes the chdev descriptors for the internal
321	// peripherals contained in the local cluster, other than the LAPIC, as specified by
322	// the boot_info, including the linking with the driver for the specified implementation.
323	// The relevant entries in all copies of the devices directory are initialised.
324	///////////////////////////////////////////////////////////////////////////////////////////
325	// @ info : pointer on the local boot-info structure.
326	///////////////////////////////////////////////////////////////////////////////////////////
327	static void internal_devices_init( boot_info_t * info )
328	{
329	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
330	uint32_t dev_nr; // actual number of devices in this cluster
331	xptr_t base; // remote pointer on segment base
332	uint32_t func; // device functionnal index
333	uint32_t impl; // device implementation index
334	uint32_t i; // device index in dev_tbl
335	uint32_t x; // X cluster coordinate
336	uint32_t y; // Y cluster coordinate
337	uint32_t channels; // number of channels
338	uint32_t channel; // channel index
339	chdev_t * chdev_ptr; // local pointer on created chdev
340
341	// get number of internal peripherals and base from boot_info
342	dev_nr = info->int_dev_nr;
343	dev_tbl = info->int_dev;
344
345	// loop on internal peripherals
346	for( i = 0 ; i < dev_nr ; i++ )
347	{
348	base = dev_tbl[i].base;
349	channels = dev_tbl[i].channels;
350	func = FUNC_FROM_TYPE( dev_tbl[i].type );
351	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
352
353	//////////////////////////
354	if( func == DEV_FUNC_MMC )
355	{
356	assert( (channels == 1) , "MMC device must be single channel\n" );
357
358	// create chdev in local cluster
359	chdev_ptr = chdev_create( func,
360	impl,
361	0, // channel
362	false, // direction
363	base );
364
365	assert( (chdev_ptr != NULL) ,
366	"cannot allocate memory for MMC chdev\n" );
367
368	// make MMC specific initialisation
369	dev_mmc_init( chdev_ptr );
370
371	// set the MMC field in all chdev_dir[x][y] structures
372	for( x = 0 ; x < info->x_size ; x++ )
373	{
374	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
375	{
376	cxy_t cxy = (x<<info->y_width) + y;
377	hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
378	XPTR( local_cxy , chdev_ptr ) );
379	}
380	}
381
382	#if( DEBUG_KERNEL_INIT & 0x1 )
383	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
384	printk("\n[DBG] %s : created MMC in cluster %x / chdev = %x\n",
385	__FUNCTION__ , local_cxy , chdev_ptr );
386	#endif
387	}
388	///////////////////////////////
389	else if( func == DEV_FUNC_DMA )
390	{
391	// create one chdev per channel in local cluster
392	for( channel = 0 ; channel < channels ; channel++ )
393	{
394	// create chdev[channel] in local cluster
395	chdev_ptr = chdev_create( func,
396	impl,
397	channel,
398	false, // direction
399	base );
400
401	assert( (chdev_ptr != NULL) , "cannot allocate memory for DMA chdev" );
402
403	// make DMA specific initialisation
404	dev_dma_init( chdev_ptr );
405
406	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
407	// structure because the DMA device is not remotely accessible.
408	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
409
410	#if( DEBUG_KERNEL_INIT & 0x1 )
411	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
412	printk("\n[DBG] %s : created DMA[%d] in cluster %x / chdev = %x\n",
413	__FUNCTION__ , channel , local_cxy , chdev_ptr );
414	#endif
415	}
416	}
417	}
418	} // end internal_devices_init()
419
420	///////////////////////////////////////////////////////////////////////////////////////////
421	// This function allocates memory and initializes the chdev descriptors for the
422	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
423	// This includes the dynamic linking with the driver for the specified implementation.
424	// These chdev descriptors are distributed on all clusters, using a modulo on a global
425	// index, identically computed in all clusters.
426	// This function is executed in all clusters by the CP0 core, that computes a global index
427	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
428	// the local cluster, because the global index matches the local index.
429	// The relevant entries in all copies of the devices directory are initialised.
430	///////////////////////////////////////////////////////////////////////////////////////////
431	// @ info : pointer on the local boot-info structure.
432	///////////////////////////////////////////////////////////////////////////////////////////
433	static void external_devices_init( boot_info_t * info )
434	{
435	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
436	uint32_t dev_nr; // actual number of external devices
437	xptr_t base; // remote pointer on segment base
438	uint32_t func; // device functionnal index
439	uint32_t impl; // device implementation index
440	uint32_t i; // device index in dev_tbl
441	uint32_t x; // X cluster coordinate
442	uint32_t y; // Y cluster coordinate
443	uint32_t channels; // number of channels
444	uint32_t channel; // channel index
445	uint32_t directions; // number of directions (1 or 2)
446	uint32_t rx; // direction index (0 or 1)
447	chdev_t * chdev; // local pointer on one channel_device descriptor
448	uint32_t ext_chdev_gid; // global index of external chdev
449
450	// get number of peripherals and base of devices array from boot_info
451	dev_nr = info->ext_dev_nr;
452	dev_tbl = info->ext_dev;
453
454	// initializes global index (PIC is already placed in cluster 0
455	ext_chdev_gid = 1;
456
457	// loop on external peripherals
458	for( i = 0 ; i < dev_nr ; i++ )
459	{
460	base = dev_tbl[i].base;
461	channels = dev_tbl[i].channels;
462	func = FUNC_FROM_TYPE( dev_tbl[i].type );
463	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
464
465	// There is one chdev per direction for NIC and for TXT
466	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
467	else directions = 1;
468
469	// do nothing for ROM, that does not require a device descriptor.
470	if( func == DEV_FUNC_ROM ) continue;
471
472	// do nothing for PIC, that is already initialized
473	if( func == DEV_FUNC_PIC ) continue;
474
475	// check PIC device initialized
476	assert( (chdev_dir.pic != XPTR_NULL ) ,
477	"PIC device must be initialized before other devices\n" );
478
479	// check external device functionnal type
480	assert( ( (func == DEV_FUNC_IOB) \|\|
481	(func == DEV_FUNC_IOC) \|\|
482	(func == DEV_FUNC_TXT) \|\|
483	(func == DEV_FUNC_NIC) \|\|
484	(func == DEV_FUNC_FBF) ) ,
485	"undefined external peripheral type\n" );
486
487	// loops on channels
488	for( channel = 0 ; channel < channels ; channel++ )
489	{
490	// loop on directions
491	for( rx = 0 ; rx < directions ; rx++ )
492	{
493	// skip TXT_TX[0] chdev that has already been created & registered
494	if( (func == DEV_FUNC_TXT) && (channel == 0) && (rx == 0) ) continue;
495
496	// compute target cluster for chdev[func,channel,direction]
497	uint32_t offset = ext_chdev_gid % ( info->x_size * (info->y_max) ); // [FIXME]
498	uint32_t cx = offset / (info->y_max); // [FIXME]
499	uint32_t cy = offset % (info->y_max); // [FIXME]
500	uint32_t target_cxy = (cx<<info->y_width) + cy;
501
502	// allocate and initialize a local chdev
503	// when local cluster matches target cluster
504	if( target_cxy == local_cxy )
505	{
506	chdev = chdev_create( func,
507	impl,
508	channel,
509	rx, // direction
510	base );
511
512	assert( (chdev != NULL),
513	"cannot allocate external device" );
514
515	// make device type specific initialisation
516	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
517	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
518	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
519	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
520	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
521
522	// all external (shared) devices are remotely accessible
523	// initialize the replicated chdev_dir[x][y] structures
524	// defining the extended pointers on chdev descriptors
525	xptr_t * entry;
526
527	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
528	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
529	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
530	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
531	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
532	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
533	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
534
535	for( x = 0 ; x < info->x_size ; x++ )
536	{
537	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
538	{
539	cxy_t cxy = (x<<info->y_width) + y;
540	hal_remote_swd( XPTR( cxy , entry ),
541	XPTR( local_cxy , chdev ) );
542	}
543	}
544
545	#if( DEBUG_KERNEL_INIT & 0x1 )
546	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
547	printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
548	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
549	#endif
550	} // end if match
551
552	// increment chdev global index (matching or not)
553	ext_chdev_gid++;
554
555	} // end loop on directions
556	} // end loop on channels
557	} // end loop on devices
558	} // end external_devices_init()
559
560	///////////////////////////////////////////////////////////////////////////////////////////
561	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
562	// device, namely the informations attached to the external IOPIC controller, that
563	// must be replicated in all clusters (struct iopic_input).
564	// This initialisation must be done before other devices initialisation because the IRQ
565	// routing infrastructure is required for both internal and external devices init.
566	///////////////////////////////////////////////////////////////////////////////////////////
567	// @ info : pointer on the local boot-info structure.
568	///////////////////////////////////////////////////////////////////////////////////////////
569	static void iopic_init( boot_info_t * info )
570	{
571	boot_device_t * dev_tbl; // pointer on boot_info external devices array
572	uint32_t dev_nr; // actual number of external devices
573	xptr_t base; // remote pointer on segment base
574	uint32_t func; // device functionnal index
575	uint32_t impl; // device implementation index
576	uint32_t i; // device index in dev_tbl
577	uint32_t x; // cluster X coordinate
578	uint32_t y; // cluster Y coordinate
579	bool_t found; // IOPIC found
580	chdev_t * chdev; // pointer on PIC chdev descriptor
581
582	// get number of external peripherals and base of array from boot_info
583	dev_nr = info->ext_dev_nr;
584	dev_tbl = info->ext_dev;
585
586	// loop on external peripherals to get the IOPIC
587	for( i = 0 , found = false ; i < dev_nr ; i++ )
588	{
589	func = FUNC_FROM_TYPE( dev_tbl[i].type );
590
591	if( func == DEV_FUNC_PIC )
592	{
593	base = dev_tbl[i].base;
594	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
595	found = true;
596	break;
597	}
598	}
599
600	assert( found , "PIC device not found\n" );
601
602	// allocate and initialize the PIC chdev in cluster 0
603	chdev = chdev_create( DEV_FUNC_PIC,
604	impl,
605	0, // channel
606	0, // direction,
607	base );
608
609	assert( (chdev != NULL), "no memory for PIC chdev\n" );
610
611	// make PIC device type specific initialisation
612	dev_pic_init( chdev );
613
614	// register, in all clusters, the extended pointer
615	// on PIC chdev in "chdev_dir" array
616	xptr_t * entry = &chdev_dir.pic;
617
618	for( x = 0 ; x < info->x_size ; x++ )
619	{
620	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
621	{
622	cxy_t cxy = (x<<info->y_width) + y;
623	hal_remote_swd( XPTR( cxy , entry ) ,
624	XPTR( local_cxy , chdev ) );
625	}
626	}
627
628	// initialize, in all clusters, the "iopic_input" structure
629	// defining how external IRQs are connected to IOPIC
630
631	// register default value for unused inputs
632	for( x = 0 ; x < info->x_size ; x++ )
633	{
634	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
635	{
636	cxy_t cxy = (x<<info->y_width) + y;
637	hal_remote_memset( XPTR( cxy , &iopic_input ) , 0xFF , sizeof(iopic_input_t) );
638	}
639	}
640
641	// register input IRQ index for valid inputs
642	uint32_t id; // input IRQ index
643	uint8_t valid; // input IRQ is connected
644	uint32_t type; // source device type
645	uint8_t channel; // source device channel
646	uint8_t is_rx; // source device direction
647	uint32_t * ptr; // local pointer on one field in iopic_input stucture
648
649	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
650	{
651	valid = dev_tbl[i].irq[id].valid;
652	type = dev_tbl[i].irq[id].dev_type;
653	channel = dev_tbl[i].irq[id].channel;
654	is_rx = dev_tbl[i].irq[id].is_rx;
655	func = FUNC_FROM_TYPE( type );
656
657	// get pointer on relevant field in iopic_input
658	if( valid )
659	{
660	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
661	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
662	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
663	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
664	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
665	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
666	else assert( false , "illegal source device for IOPIC input" );
667
668	// set one entry in all "iopic_input" structures
669	for( x = 0 ; x < info->x_size ; x++ )
670	{
671	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
672	{
673	cxy_t cxy = (x<<info->y_width) + y;
674	hal_remote_swd( XPTR( cxy , ptr ) , id );
675	}
676	}
677	}
678	}
679
680	#if( DEBUG_KERNEL_INIT & 0x1 )
681	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
682	{
683	printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
684	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
685	dev_pic_inputs_display();
686	}
687	#endif
688
689	} // end iopic_init()
690
691	///////////////////////////////////////////////////////////////////////////////////////////
692	// This function is called by all CP0s in all cluster to complete the PIC device
693	// initialisation, namely the informations attached to the LAPIC controller.
694	// This initialisation must be done after the IOPIC initialisation, but before other
695	// devices initialisation because the IRQ routing infrastructure is required for both
696	// internal and external devices initialisation.
697	///////////////////////////////////////////////////////////////////////////////////////////
698	// @ info : pointer on the local boot-info structure.
699	///////////////////////////////////////////////////////////////////////////////////////////
700	static void lapic_init( boot_info_t * info )
701	{
702	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
703	uint32_t dev_nr; // number of internal devices
704	uint32_t i; // device index in dev_tbl
705	xptr_t base; // remote pointer on segment base
706	uint32_t func; // device functionnal type in boot_info
707	bool_t found; // LAPIC found
708
709	// get number of internal peripherals and base
710	dev_nr = info->int_dev_nr;
711	dev_tbl = info->int_dev;
712
713	// loop on internal peripherals to get the lapic device
714	for( i = 0 , found = false ; i < dev_nr ; i++ )
715	{
716	func = FUNC_FROM_TYPE( dev_tbl[i].type );
717
718	if( func == DEV_FUNC_ICU )
719	{
720	base = dev_tbl[i].base;
721	found = true;
722	break;
723	}
724	}
725
726	// if the LAPIC controller is not defined in the boot_info,
727	// we simply don't initialize the PIC extensions in the kernel,
728	// making the assumption that the LAPIC related informations
729	// are hidden in the hardware specific PIC driver.
730	if( found )
731	{
732	// initialise the PIC extensions for
733	// the core descriptor and core manager extensions
734	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
735
736	// initialize the "lapic_input" structure
737	// defining how internal IRQs are connected to LAPIC
738	uint32_t id;
739	uint8_t valid;
740	uint8_t channel;
741	uint32_t func;
742
743	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
744	{
745	valid = dev_tbl[i].irq[id].valid;
746	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
747	channel = dev_tbl[i].irq[id].channel;
748
749	if( valid ) // only valid local IRQs are registered
750	{
751	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
752	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
753	else if( func == DEV_FUNC_TXT ) lapic_input.mtty = id;
754	else assert( false , "illegal source device for LAPIC input" );
755	}
756	}
757	}
758	} // end lapic_init()
759
760	///////////////////////////////////////////////////////////////////////////////////////////
761	// This static function returns the identifiers of the calling core.
762	///////////////////////////////////////////////////////////////////////////////////////////
763	// @ info : pointer on boot_info structure.
764	// @ lid : [out] core local index in cluster.
765	// @ cxy : [out] cluster identifier.
766	// @ lid : [out] core global identifier (hardware).
767	// @ return 0 if success / return EINVAL if not found.
768	///////////////////////////////////////////////////////////////////////////////////////////
769	static error_t get_core_identifiers( boot_info_t * info,
770	lid_t * lid,
771	cxy_t * cxy,
772	gid_t * gid )
773	{
774	uint32_t i;
775	gid_t global_id;
776
777	// get global identifier from hardware register
778	global_id = hal_get_gid();
779
780	// makes an associative search in boot_info to get (cxy,lid) from global_id
781	for( i = 0 ; i < info->cores_nr ; i++ )
782	{
783	if( global_id == info->core[i].gid )
784	{
785	*lid = info->core[i].lid;
786	*cxy = info->core[i].cxy;
787	*gid = global_id;
788	return 0;
789	}
790	}
791	return EINVAL;
792	}
793
794	///////////////////////////////////////////////////////////////////////////////////////////
795	// This function is the entry point for the kernel initialisation.
796	// It is executed by all cores in all clusters, but only core[0], called CP0,
797	// initializes the shared resources such as the cluster manager, or the local peripherals.
798	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
799	// only information contained in the local boot_info_t structure, set by the bootloader.
800	// Only CP0 in cluster 0 print the log messages.
801	///////////////////////////////////////////////////////////////////////////////////////////
802	// @ info : pointer on the local boot-info structure.
803	///////////////////////////////////////////////////////////////////////////////////////////
804	void kernel_init( boot_info_t * info )
805	{
806	lid_t core_lid = -1; // running core local index
807	cxy_t core_cxy = -1; // running core cluster identifier
808	gid_t core_gid; // running core hardware identifier
809	cluster_t * cluster; // pointer on local cluster manager
810	core_t * core; // pointer on running core descriptor
811	thread_t * thread; // pointer on idle thread descriptor
812
813	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
814	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
815	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
816	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
817
818	error_t error;
819	reg_t status; // running core status register
820
821	/////////////////////////////////////////////////////////////////////////////////
822	// STEP 0 : Each core get its core identifier from boot_info, and makes
823	// a partial initialisation of its private idle thread descriptor.
824	// CP0 initializes the "local_cxy" global variable.
825	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
826	/////////////////////////////////////////////////////////////////////////////////
827
828	error = get_core_identifiers( info,
829	&core_lid,
830	&core_cxy,
831	&core_gid );
832
833	// CP0 initializes cluster identifier
834	if( core_lid == 0 ) local_cxy = info->cxy;
835
836	// each core gets a pointer on its private idle thread descriptor
837	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
838
839	// each core registers this thread pointer in hardware register
840	hal_set_current_thread( thread );
841
842	// each core register core descriptor pointer in idle thread descriptor
843	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
844
845	// each core initializes the idle thread lists of locks
846	list_root_init( &thread->locks_root );
847	xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) );
848	thread->local_locks = 0;
849	thread->remote_locks = 0;
850
851	// CP0 in cluster 0 initializes TXT0 chdev descriptor
852	if( core_cxy == 0 && core_lid == 0 ) // [MODIF]
853	{
854	if( info->use_mty0 == 1 ) {
855	mtty0_device_init( info );
856	} else {
857	txt0_device_init( info );
858	}
859	}
860	// [FIXME]
861
862	/////////////////////////////////////////////////////////////////////////////////
863	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
864	(info->x_size * (info->y_max)) );
865	barrier_wait( &local_barrier , info->cores_nr );
866	/////////////////////////////////////////////////////////////////////////////////
867
868	#if DEBUG_KERNEL_INIT
869	if( (core_lid == 0) & (local_cxy == 0) )
870	printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / cycle %d\n",
871	__FUNCTION__, (uint32_t)hal_get_cycles() );
872	#endif
873
874	/////////////////////////////////////////////////////////////////////////////
875	// STEP 1 : all cores check core identifier.
876	// CP0 initializes the local cluster manager.
877	// This includes the memory allocators.
878	/////////////////////////////////////////////////////////////////////////////
879
880	// all cores check identifiers
881	if( error )
882	{
883	assert( false ,
884	"illegal core identifiers gid = %x / cxy = %x / lid = %d",
885	core_lid , core_cxy , core_lid );
886	}
887
888	// CP0 initializes cluster manager
889	if( core_lid == 0 )
890	{
891	error = cluster_init( info );
892
893	if( error )
894	{
895	assert( false ,
896	"cannot initialise cluster %x", local_cxy );
897	}
898	}
899
900	/////////////////////////////////////////////////////////////////////////////////
901	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
902	(info->x_size * (info->y_max)) );
903	barrier_wait( &local_barrier , info->cores_nr );
904	/////////////////////////////////////////////////////////////////////////////////
905
906	#if DEBUG_KERNEL_INIT
907	if( (core_lid == 0) & (local_cxy == 0) )
908	printk("\n[DBG] %s : exit barrier 1 : clusters initialised / cycle %d\n",
909	__FUNCTION__, (uint32_t)hal_get_cycles() );
910	#endif
911
912	/////////////////////////////////////////////////////////////////////////////////
913	// STEP 2 : CP0 initializes the process_zero descriptor.
914	// CP0 in cluster 0 initializes the IOPIC device.
915	/////////////////////////////////////////////////////////////////////////////////
916
917	// all cores get pointer on local cluster manager & core descriptor
918	cluster = &cluster_manager;
919	core = &cluster->core_tbl[core_lid];
920
921	// all CP0s initialize the process_zero descriptor
922	if( core_lid == 0 ) process_zero_create( &process_zero );
923
924	// CP0 in cluster 0 initializes the PIC chdev,
925	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
926
927	////////////////////////////////////////////////////////////////////////////////
928	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
929	(info->x_size * (info->y_max)) );
930	barrier_wait( &local_barrier , info->cores_nr );
931	////////////////////////////////////////////////////////////////////////////////
932
933	#if DEBUG_KERNEL_INIT
934	if( (core_lid == 0) & (local_cxy == 0) )
935	printk("\n[DBG] %s : exit barrier 2 : PIC initialised / cycle %d\n",
936	__FUNCTION__, (uint32_t)hal_get_cycles() );
937	#endif
938
939	////////////////////////////////////////////////////////////////////////////////
940	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
941	// CP0 initializes the internal chdev descriptors
942	// CP0 initialize the local external chdev descriptors
943	////////////////////////////////////////////////////////////////////////////////
944
945	// all CP0s initialize their local LAPIC extension,
946	if( core_lid == 0 ) lapic_init( info );
947
948	// CP0 scan the internal (private) peripherals,
949	// and allocates memory for the corresponding chdev descriptors.
950	if( core_lid == 0 ) internal_devices_init( info );
951
952
953	// All CP0s contribute to initialise external peripheral chdev descriptors.
954	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
955	// and allocates memory for the chdev descriptors that must be placed
956	// on the (cxy) cluster according to the global index value.
957
958	if( core_lid == 0 ) external_devices_init( info );
959
960	/////////////////////////////////////////////////////////////////////////////////
961	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
962	(info->x_size * (info->y_max)) );
963	barrier_wait( &local_barrier , info->cores_nr );
964	/////////////////////////////////////////////////////////////////////////////////
965
966	#if DEBUG_KERNEL_INIT
967	if( (core_lid == 0) & (local_cxy == 0) )
968	printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / cycle %d\n",
969	__FUNCTION__, (uint32_t)hal_get_cycles() );
970	#endif
971
972	#if( DEBUG_KERNEL_INIT & 1 )
973	if( (core_lid == 0) & (local_cxy == 0) )
974	chdev_dir_display();
975	#endif
976
977	/////////////////////////////////////////////////////////////////////////////////
978	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
979	// Alh cores initialize IDLE thread.
980	// Only CP0 in cluster 0 creates the VFS root inode.
981	// It access the boot device to initialize the file system context.
982	/////////////////////////////////////////////////////////////////////////////////
983
984	// All cores enable the shared IPI channel
985	dev_pic_enable_ipi();
986	hal_enable_irq( &status );
987
988	#if DEBUG_KERNEL_INIT
989	printk("\n[DBG] %s: IPI enabled for core %d cluster %d\n", __FUNCTION__,
990	core_lid, local_cxy);
991	#endif
992
993	// all cores initialize the idle thread descriptor
994	thread_idle_init( thread,
995	THREAD_IDLE,
996	&thread_idle_func,
997	NULL,
998	core_lid );
999
1000	// all cores unblock idle thread, and register it in scheduler
1001	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1002	core->scheduler.idle = thread;
1003
1004	#if( DEBUG_KERNEL_INIT & 1 )
1005	sched_display( core_lid );
1006	#endif
1007
1008	// CPO in cluster 0 creates the VFS root
1009	if( (core_lid == 0) && (local_cxy == 0 ) )
1010	{
1011	vfs_root_inode_xp = XPTR_NULL;
1012
1013	// File System must be FATFS in this implementation,
1014	// but other File System can be introduced here
1015	if( CONFIG_VFS_ROOT_IS_FATFS )
1016	{
1017	// 1. allocate memory for FATFS context in cluster 0
1018	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1019
1020	assert( (fatfs_ctx != NULL) ,
1021	"cannot create FATFS context in cluster 0\n" );
1022
1023	// 2. access boot device to initialize FATFS context
1024	fatfs_ctx_init( fatfs_ctx );
1025
1026	// 3. get various informations from FATFS context
1027	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1028	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1029	fatfs_ctx->sectors_per_cluster;
1030	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1031
1032	// 4. create VFS root inode in cluster 0
1033	error = vfs_inode_create( XPTR_NULL, // dentry_xp
1034	FS_TYPE_FATFS, // fs_type
1035	INODE_TYPE_DIR, // inode_type
1036	(void *)(intptr_t)root_dir_cluster, // extend
1037	0, // attr
1038	0, // rights
1039	0, // uid
1040	0, // gid
1041	&vfs_root_inode_xp ); // return
1042
1043	assert( (error == 0) ,
1044	"cannot create VFS root inode\n" );
1045
1046	// 5. initialize VFS context for FAT in cluster 0
1047	vfs_ctx_init( FS_TYPE_FATFS, // file system type
1048	0, // attributes
1049	total_clusters,
1050	cluster_size,
1051	vfs_root_inode_xp, // VFS root
1052	fatfs_ctx ); // extend
1053
1054	// 6. check initialisation
1055	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1056	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1057	"illegal value for FATFS context in cluster %x\n", local_cxy );
1058	}
1059	else
1060	{
1061	assert( false ,
1062	"root FS must be FATFS" );
1063	}
1064
1065	// register VFS root inode in process_zero descriptor of cluster 0
1066	process_zero.vfs_root_xp = vfs_root_inode_xp;
1067	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1068	}
1069
1070	/////////////////////////////////////////////////////////////////////////////////
1071	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1072	(info->x_size * (info->y_max)) );
1073	barrier_wait( &local_barrier , info->cores_nr );
1074	/////////////////////////////////////////////////////////////////////////////////
1075
1076	#if DEBUG_KERNEL_INIT
1077	if( (core_lid == 0) & (local_cxy == 0) )
1078	printk("\n[DBG] %s : exit barrier 4 : VFS_root = %l in cluster 0 / cycle %d\n",
1079	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1080	#endif
1081
1082	/////////////////////////////////////////////////////////////////////////////////
1083	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1084	// and initialise both the local FS context and the local VFS context
1085	// from values stored in cluster 0.
1086	// They get the VFS root inode extended pointer from cluster 0.
1087	/////////////////////////////////////////////////////////////////////////////////
1088
1089	if( (core_lid == 0) && (local_cxy != 0) )
1090	{
1091	// File System must be FATFS in this implementation,
1092	// but other File System can be introduced here
1093	if( CONFIG_VFS_ROOT_IS_FATFS )
1094	{
1095	// 1. allocate memory for local FATFS context
1096	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1097
1098	assert( (local_fatfs_ctx != NULL) ,
1099	"cannot create FATFS context in cluster %x\n", local_cxy );
1100
1101	// 2. get local pointer on VFS context for FATFS
1102	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1103
1104	// 3. get local pointer on FATFS context in cluster 0
1105	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1106
1107	// 4. copy FATFS context from cluster 0 to local cluster
1108	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1109	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1110
1111	// 5. copy VFS context from cluster 0 to local cluster
1112	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1113	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1114
1115	// 6. update extend field in local copy of VFS context
1116	vfs_ctx->extend = local_fatfs_ctx;
1117
1118	// 7. check initialisation
1119	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1120	"illegal value for FATFS context in cluster %x\n", local_cxy );
1121	}
1122
1123	// get extended pointer on VFS root inode from cluster 0
1124	vfs_root_inode_xp = hal_remote_lwd( XPTR( 0 , &process_zero.vfs_root_xp ) );
1125
1126	// update local process_zero descriptor
1127	process_zero.vfs_root_xp = vfs_root_inode_xp;
1128	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1129	}
1130
1131	/////////////////////////////////////////////////////////////////////////////////
1132	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1133	(info->x_size * (info->y_max)) );
1134	barrier_wait( &local_barrier , info->cores_nr );
1135	/////////////////////////////////////////////////////////////////////////////////
1136
1137	#if DEBUG_KERNEL_INIT
1138	if( (core_lid == 0) & (local_cxy == 0) )
1139	printk("\n[DBG] %s : exit barrier 5 : VFS_root = %l in cluster 0 / cycle %d\n",
1140	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1141	#endif
1142
1143	/////////////////////////////////////////////////////////////////////////////////
1144	// STEP 6 : CP0 in cluster IO makes the global DEVFS tree initialisation:
1145	// It creates the DEVFS directory "dev", and the DEVFS "external"
1146	// directory in cluster IO and mount these inodes into VFS.
1147	/////////////////////////////////////////////////////////////////////////////////
1148
1149	if( (core_lid == 0) && (local_cxy == 0) ) // [FIXME]
1150	{
1151	// create "dev" and "external" directories.
1152	devfs_global_init( process_zero.vfs_root_xp,
1153	&devfs_dev_inode_xp,
1154	&devfs_external_inode_xp );
1155
1156	// creates the DEVFS context in cluster IO
1157	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1158
1159	assert( (devfs_ctx != NULL) ,
1160	"cannot create DEVFS context in cluster IO\n");
1161
1162	// register DEVFS root and external directories
1163	devfs_ctx_init( devfs_ctx, devfs_dev_inode_xp, devfs_external_inode_xp );
1164	}
1165
1166	/////////////////////////////////////////////////////////////////////////////////
1167	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1168	(info->x_size * (info->y_max)) );
1169	barrier_wait( &local_barrier , info->cores_nr );
1170	/////////////////////////////////////////////////////////////////////////////////
1171
1172	#if DEBUG_KERNEL_INIT
1173	if( (core_lid == 0) & (local_cxy == 0) )
1174	printk("\n[DBG] %s : exit barrier 6 : dev_root = %l in cluster 0 / cycle %d\n",
1175	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1176	#endif
1177
1178	/////////////////////////////////////////////////////////////////////////////////
1179	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1180	// Each CP0 get the "dev" and "external" extended pointers from
1181	// values stored in cluster IO.
1182	// Then each CP0 in cluster(i) creates the DEVFS "internal directory,
1183	// and creates the pseudo-files for all chdevs in cluster (i).
1184	/////////////////////////////////////////////////////////////////////////////////
1185
1186	if( core_lid == 0 )
1187	{
1188	// get extended pointer on "extend" field of VFS context for DEVFS in cluster IO
1189	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend ); // [FIXME]
1190
1191	// get pointer on DEVFS context in cluster 0
1192	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1193
1194	devfs_dev_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1195	devfs_external_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1196
1197	// populate DEVFS in all clusters
1198	devfs_local_init( devfs_dev_inode_xp,
1199	devfs_external_inode_xp,
1200	&devfs_internal_inode_xp );
1201	}
1202
1203	/////////////////////////////////////////////////////////////////////////////////
1204	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1205	(info->x_size * (info->y_max)) );
1206	barrier_wait( &local_barrier , info->cores_nr );
1207	/////////////////////////////////////////////////////////////////////////////////
1208
1209	#if DEBUG_KERNEL_INIT
1210	if( (core_lid == 0) & (local_cxy == 0) )
1211	printk("\n[DBG] %s : exit barrier 7 : dev_root = %l in cluster 0 / cycle %d\n",
1212	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1213	#endif
1214
1215	/////////////////////////////////////////////////////////////////////////////////
1216	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1217	/////////////////////////////////////////////////////////////////////////////////
1218
1219	if( (core_lid == 0) && (local_cxy == 0) )
1220	{
1221
1222	#if( DEBUG_KERNEL_INIT & 1 )
1223	vfs_display( vfs_root_inode_xp );
1224	#endif
1225
1226	process_init_create();
1227	}
1228
1229	/////////////////////////////////////////////////////////////////////////////////
1230	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1231	(info->x_size * (info->y_max)) );
1232	barrier_wait( &local_barrier , info->cores_nr );
1233	/////////////////////////////////////////////////////////////////////////////////
1234
1235	#if DEBUG_KERNEL_INIT
1236	if( (core_lid == 0) & (local_cxy == 0) )
1237	printk("\n[DBG] %s : exit barrier 8 : process init created / cycle %d\n",
1238	__FUNCTION__ , (uint32_t)hal_get_cycles() );
1239	#endif
1240
1241	#if (DEBUG_KERNEL_INIT & 1)
1242	if( (core_lid == 0) & (local_cxy == 0) )
1243	sched_display( 0 );
1244	#endif
1245
1246	/////////////////////////////////////////////////////////////////////////////////
1247	// STEP 9 : CP0 in cluster 0 print banner
1248	/////////////////////////////////////////////////////////////////////////////////
1249
1250	if( (core_lid == 0) && (local_cxy == 0) ) // [FIXME]
1251	{
1252	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1253
1254	#if( DEBUG_KERNEL_INIT & 1 )
1255	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1256	" - thread descriptor : %d bytes\n"
1257	" - process descriptor : %d bytes\n"
1258	" - cluster manager : %d bytes\n"
1259	" - chdev descriptor : %d bytes\n"
1260	" - core descriptor : %d bytes\n"
1261	" - scheduler : %d bytes\n"
1262	" - rpc fifo : %d bytes\n"
1263	" - page descriptor : %d bytes\n"
1264	" - mapper root : %d bytes\n"
1265	" - ppm manager : %d bytes\n"
1266	" - kcm manager : %d bytes\n"
1267	" - khm manager : %d bytes\n"
1268	" - vmm manager : %d bytes\n"
1269	" - gpt root : %d bytes\n"
1270	" - list item : %d bytes\n"
1271	" - xlist item : %d bytes\n"
1272	" - spinlock : %d bytes\n"
1273	" - remote spinlock : %d bytes\n"
1274	" - rwlock : %d bytes\n"
1275	" - remote rwlock : %d bytes\n",
1276	sizeof( thread_t ),
1277	sizeof( process_t ),
1278	sizeof( cluster_t ),
1279	sizeof( chdev_t ),
1280	sizeof( core_t ),
1281	sizeof( scheduler_t ),
1282	sizeof( remote_fifo_t ),
1283	sizeof( page_t ),
1284	sizeof( mapper_t ),
1285	sizeof( ppm_t ),
1286	sizeof( kcm_t ),
1287	sizeof( khm_t ),
1288	sizeof( vmm_t ),
1289	sizeof( gpt_t ),
1290	sizeof( list_entry_t ),
1291	sizeof( xlist_entry_t ),
1292	sizeof( spinlock_t ),
1293	sizeof( remote_spinlock_t ),
1294	sizeof( rwlock_t ),
1295	sizeof( remote_rwlock_t ));
1296	#endif
1297
1298	}
1299
1300	// each core activates its private TICK IRQ
1301	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1302
1303	#if DEBUG_KERNEL_INIT
1304	printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1305	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1306	#endif
1307
1308	// each core jump to thread_idle_func
1309	thread_idle_func();
1310	}
1311

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