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source: trunk/kernel/kern/kernel_init.c @ 536

Last change on this file since 536 was 536, checked in by nicolas.van.phan@…, 6 years ago
TTY MUX 1 : Init tty chdevs in internal_devices_init()
File size: 58.0 KB

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1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017)
6	*
7	* Copyright (c) Sorbonne Universites
8	*
9	* This file is part of ALMOS-MKH.
10	*
11	* ALMOS-MKH is free software; you can redistribute it and/or modify it
12	* under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; version 2.0 of the License.
14	*
15	* ALMOS-MKH is distributed in the hope that it will be useful, but
16	* WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18	* General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
22	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23	*/
24
25	#include <kernel_config.h>
26	#include <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	else if ( func == DEV_FUNC_TXT && info->use_mty0 == 1 )
419	{
420	assert(impl == IMPL_TXT_MTY,
421	"Internal TTYs should have MTY implementation\n");
422
423	for ( channel = 0; channel < channels; channel++ )
424	{
425	int rx;
426	for ( rx = 0; rx <= 1; rx++ )
427	{
428	// skip MTY0_TX since it has already been initialized
429	if ( channel == 0 && rx == 0 ) continue;
430
431	// create chdev in local cluster
432	chdev_ptr = chdev_create( func,
433	impl,
434	channel,
435	rx,
436	base );
437
438	assert( (chdev_ptr != NULL) ,
439	"cannot allocate memory for MTY chdev" );
440
441	// make MTY specific initialization
442	dev_txt_init( chdev_ptr );
443
444	// set the MTY fields in all clusters
445	xptr_t *chdev_entry;
446	if ( rx == 1 ) {
447	chdev_entry = &chdev_dir.txt_rx[channel];
448	} else {
449	chdev_entry = &chdev_dir.txt_tx[channel];
450	}
451	for ( x = 0; x < info->x_max; x++ )
452	{
453	for ( y = 0; y < info->y_max; y++ )
454	{
455	cxy_t cxy = (x<<info->y_width) + y;
456	hal_remote_swd( XPTR( cxy, chdev_entry ),
457	XPTR( local_cxy, chdev_ptr ) );
458	}
459	}
460	}
461	}
462	}
463	}
464	} // end internal_devices_init()
465
466	///////////////////////////////////////////////////////////////////////////////////////////
467	// This function allocates memory and initializes the chdev descriptors for the
468	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
469	// This includes the dynamic linking with the driver for the specified implementation.
470	// These chdev descriptors are distributed on all clusters, using a modulo on a global
471	// index, identically computed in all clusters.
472	// This function is executed in all clusters by the CP0 core, that computes a global index
473	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
474	// the local cluster, because the global index matches the local index.
475	// The relevant entries in all copies of the devices directory are initialised.
476	///////////////////////////////////////////////////////////////////////////////////////////
477	// @ info : pointer on the local boot-info structure.
478	///////////////////////////////////////////////////////////////////////////////////////////
479	static void external_devices_init( boot_info_t * info )
480	{
481	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
482	uint32_t dev_nr; // actual number of external devices
483	xptr_t base; // remote pointer on segment base
484	uint32_t func; // device functionnal index
485	uint32_t impl; // device implementation index
486	uint32_t i; // device index in dev_tbl
487	uint32_t x; // X cluster coordinate
488	uint32_t y; // Y cluster coordinate
489	uint32_t channels; // number of channels
490	uint32_t channel; // channel index
491	uint32_t directions; // number of directions (1 or 2)
492	uint32_t rx; // direction index (0 or 1)
493	chdev_t * chdev; // local pointer on one channel_device descriptor
494	uint32_t ext_chdev_gid; // global index of external chdev
495
496	// get number of peripherals and base of devices array from boot_info
497	dev_nr = info->ext_dev_nr;
498	dev_tbl = info->ext_dev;
499
500	// initializes global index (PIC is already placed in cluster 0
501	ext_chdev_gid = 1;
502
503	// loop on external peripherals
504	for( i = 0 ; i < dev_nr ; i++ )
505	{
506	base = dev_tbl[i].base;
507	channels = dev_tbl[i].channels;
508	func = FUNC_FROM_TYPE( dev_tbl[i].type );
509	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
510
511	// There is one chdev per direction for NIC and for TXT
512	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
513	else directions = 1;
514
515	// do nothing for ROM, that does not require a device descriptor.
516	if( func == DEV_FUNC_ROM ) continue;
517
518	// do nothing for PIC, that is already initialized
519	if( func == DEV_FUNC_PIC ) continue;
520
521	// check PIC device initialized
522	assert( (chdev_dir.pic != XPTR_NULL ) ,
523	"PIC device must be initialized before other devices\n" );
524
525	// check external device functionnal type
526	assert( ( (func == DEV_FUNC_IOB) \|\|
527	(func == DEV_FUNC_IOC) \|\|
528	(func == DEV_FUNC_TXT) \|\|
529	(func == DEV_FUNC_NIC) \|\|
530	(func == DEV_FUNC_FBF) ) ,
531	"undefined external peripheral type\n" );
532
533	// loops on channels
534	for( channel = 0 ; channel < channels ; channel++ )
535	{
536	// loop on directions
537	for( rx = 0 ; rx < directions ; rx++ )
538	{
539	// skip TXT_TX[0] chdev that has already been created & registered
540	if( info->use_mty0 == 0 && (func == DEV_FUNC_TXT) && (channel == 0) && (rx == 0) )
541	{
542	continue;
543	}
544
545	// skip TXT chdevs because they are initialized in internal_devices_init()
546	if ( info->use_mty0 == 1 && func == DEV_FUNC_TXT )
547	{
548	continue;
549	}
550
551	// compute target cluster for chdev[func,channel,direction]
552	uint32_t offset = ext_chdev_gid % ( info->x_size * (info->y_max) ); // [FIXME]
553	uint32_t cx = offset / (info->y_max); // [FIXME]
554	uint32_t cy = offset % (info->y_max); // [FIXME]
555	uint32_t target_cxy = (cx<<info->y_width) + cy;
556
557	// allocate and initialize a local chdev
558	// when local cluster matches target cluster
559	if( target_cxy == local_cxy )
560	{
561	chdev = chdev_create( func,
562	impl,
563	channel,
564	rx, // direction
565	base );
566
567	assert( (chdev != NULL),
568	"cannot allocate external device" );
569
570	// make device type specific initialisation
571	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
572	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
573	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
574	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
575	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
576
577	// all external (shared) devices are remotely accessible
578	// initialize the replicated chdev_dir[x][y] structures
579	// defining the extended pointers on chdev descriptors
580	xptr_t * entry;
581
582	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
583	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
584	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
585	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
586	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
587	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
588	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
589
590	for( x = 0 ; x < info->x_size ; x++ )
591	{
592	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
593	{
594	cxy_t cxy = (x<<info->y_width) + y;
595	hal_remote_swd( XPTR( cxy , entry ),
596	XPTR( local_cxy , chdev ) );
597	}
598	}
599
600	#if( DEBUG_KERNEL_INIT & 0x1 )
601	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
602	printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
603	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
604	#endif
605	} // end if match
606
607	// increment chdev global index (matching or not)
608	ext_chdev_gid++;
609
610	} // end loop on directions
611	} // end loop on channels
612	} // end loop on devices
613	} // end external_devices_init()
614
615	///////////////////////////////////////////////////////////////////////////////////////////
616	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
617	// device, namely the informations attached to the external IOPIC controller, that
618	// must be replicated in all clusters (struct iopic_input).
619	// This initialisation must be done before other devices initialisation because the IRQ
620	// routing infrastructure is required for both internal and external devices init.
621	///////////////////////////////////////////////////////////////////////////////////////////
622	// @ info : pointer on the local boot-info structure.
623	///////////////////////////////////////////////////////////////////////////////////////////
624	static void iopic_init( boot_info_t * info )
625	{
626	boot_device_t * dev_tbl; // pointer on boot_info external devices array
627	uint32_t dev_nr; // actual number of external devices
628	xptr_t base; // remote pointer on segment base
629	uint32_t func; // device functionnal index
630	uint32_t impl; // device implementation index
631	uint32_t i; // device index in dev_tbl
632	uint32_t x; // cluster X coordinate
633	uint32_t y; // cluster Y coordinate
634	bool_t found; // IOPIC found
635	chdev_t * chdev; // pointer on PIC chdev descriptor
636
637	// get number of external peripherals and base of array from boot_info
638	dev_nr = info->ext_dev_nr;
639	dev_tbl = info->ext_dev;
640
641	// loop on external peripherals to get the IOPIC
642	for( i = 0 , found = false ; i < dev_nr ; i++ )
643	{
644	func = FUNC_FROM_TYPE( dev_tbl[i].type );
645
646	if( func == DEV_FUNC_PIC )
647	{
648	base = dev_tbl[i].base;
649	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
650	found = true;
651	break;
652	}
653	}
654
655	assert( found , "PIC device not found\n" );
656
657	// allocate and initialize the PIC chdev in cluster 0
658	chdev = chdev_create( DEV_FUNC_PIC,
659	impl,
660	0, // channel
661	0, // direction,
662	base );
663
664	assert( (chdev != NULL), "no memory for PIC chdev\n" );
665
666	// make PIC device type specific initialisation
667	dev_pic_init( chdev );
668
669	// register, in all clusters, the extended pointer
670	// on PIC chdev in "chdev_dir" array
671	xptr_t * entry = &chdev_dir.pic;
672
673	for( x = 0 ; x < info->x_size ; x++ )
674	{
675	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
676	{
677	cxy_t cxy = (x<<info->y_width) + y;
678	hal_remote_swd( XPTR( cxy , entry ) ,
679	XPTR( local_cxy , chdev ) );
680	}
681	}
682
683	// initialize, in all clusters, the "iopic_input" structure
684	// defining how external IRQs are connected to IOPIC
685
686	// register default value for unused inputs
687	for( x = 0 ; x < info->x_size ; x++ )
688	{
689	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
690	{
691	cxy_t cxy = (x<<info->y_width) + y;
692	hal_remote_memset( XPTR( cxy , &iopic_input ) , 0xFF , sizeof(iopic_input_t) );
693	}
694	}
695
696	// register input IRQ index for valid inputs
697	uint32_t id; // input IRQ index
698	uint8_t valid; // input IRQ is connected
699	uint32_t type; // source device type
700	uint8_t channel; // source device channel
701	uint8_t is_rx; // source device direction
702	uint32_t * ptr; // local pointer on one field in iopic_input stucture
703
704	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
705	{
706	valid = dev_tbl[i].irq[id].valid;
707	type = dev_tbl[i].irq[id].dev_type;
708	channel = dev_tbl[i].irq[id].channel;
709	is_rx = dev_tbl[i].irq[id].is_rx;
710	func = FUNC_FROM_TYPE( type );
711
712	// get pointer on relevant field in iopic_input
713	if( valid )
714	{
715	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
716	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
717	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
718	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
719	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
720	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
721	else assert( false , "illegal source device for IOPIC input" );
722
723	// set one entry in all "iopic_input" structures
724	for( x = 0 ; x < info->x_size ; x++ )
725	{
726	for( y = 0 ; y < info->y_max; y++ ) // [FIXME]
727	{
728	cxy_t cxy = (x<<info->y_width) + y;
729	hal_remote_swd( XPTR( cxy , ptr ) , id );
730	}
731	}
732	}
733	}
734
735	#if( DEBUG_KERNEL_INIT & 0x1 )
736	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
737	{
738	printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
739	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
740	dev_pic_inputs_display();
741	}
742	#endif
743
744	} // end iopic_init()
745
746	///////////////////////////////////////////////////////////////////////////////////////////
747	// This function is called by all CP0s in all cluster to complete the PIC device
748	// initialisation, namely the informations attached to the LAPIC controller.
749	// This initialisation must be done after the IOPIC initialisation, but before other
750	// devices initialisation because the IRQ routing infrastructure is required for both
751	// internal and external devices initialisation.
752	///////////////////////////////////////////////////////////////////////////////////////////
753	// @ info : pointer on the local boot-info structure.
754	///////////////////////////////////////////////////////////////////////////////////////////
755	static void lapic_init( boot_info_t * info )
756	{
757	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
758	uint32_t dev_nr; // number of internal devices
759	uint32_t i; // device index in dev_tbl
760	xptr_t base; // remote pointer on segment base
761	uint32_t func; // device functionnal type in boot_info
762	bool_t found; // LAPIC found
763
764	// get number of internal peripherals and base
765	dev_nr = info->int_dev_nr;
766	dev_tbl = info->int_dev;
767
768	// loop on internal peripherals to get the lapic device
769	for( i = 0 , found = false ; i < dev_nr ; i++ )
770	{
771	func = FUNC_FROM_TYPE( dev_tbl[i].type );
772
773	if( func == DEV_FUNC_ICU )
774	{
775	base = dev_tbl[i].base;
776	found = true;
777	break;
778	}
779	}
780
781	// if the LAPIC controller is not defined in the boot_info,
782	// we simply don't initialize the PIC extensions in the kernel,
783	// making the assumption that the LAPIC related informations
784	// are hidden in the hardware specific PIC driver.
785	if( found )
786	{
787	// initialise the PIC extensions for
788	// the core descriptor and core manager extensions
789	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
790
791	// initialize the "lapic_input" structure
792	// defining how internal IRQs are connected to LAPIC
793	uint32_t id;
794	uint8_t valid;
795	uint8_t channel;
796	uint32_t func;
797
798	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
799	{
800	valid = dev_tbl[i].irq[id].valid;
801	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
802	channel = dev_tbl[i].irq[id].channel;
803
804	if( valid ) // only valid local IRQs are registered
805	{
806	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
807	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
808	else if( func == DEV_FUNC_TXT ) lapic_input.mtty = id;
809	else assert( false , "illegal source device for LAPIC input" );
810	}
811	}
812	}
813	} // end lapic_init()
814
815	///////////////////////////////////////////////////////////////////////////////////////////
816	// This static function returns the identifiers of the calling core.
817	///////////////////////////////////////////////////////////////////////////////////////////
818	// @ info : pointer on boot_info structure.
819	// @ lid : [out] core local index in cluster.
820	// @ cxy : [out] cluster identifier.
821	// @ lid : [out] core global identifier (hardware).
822	// @ return 0 if success / return EINVAL if not found.
823	///////////////////////////////////////////////////////////////////////////////////////////
824	static error_t get_core_identifiers( boot_info_t * info,
825	lid_t * lid,
826	cxy_t * cxy,
827	gid_t * gid )
828	{
829	uint32_t i;
830	gid_t global_id;
831
832	// get global identifier from hardware register
833	global_id = hal_get_gid();
834
835	// makes an associative search in boot_info to get (cxy,lid) from global_id
836	for( i = 0 ; i < info->cores_nr ; i++ )
837	{
838	if( global_id == info->core[i].gid )
839	{
840	*lid = info->core[i].lid;
841	*cxy = info->core[i].cxy;
842	*gid = global_id;
843	return 0;
844	}
845	}
846	return EINVAL;
847	}
848
849	///////////////////////////////////////////////////////////////////////////////////////////
850	// This function is the entry point for the kernel initialisation.
851	// It is executed by all cores in all clusters, but only core[0], called CP0,
852	// initializes the shared resources such as the cluster manager, or the local peripherals.
853	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
854	// only information contained in the local boot_info_t structure, set by the bootloader.
855	// Only CP0 in cluster 0 print the log messages.
856	///////////////////////////////////////////////////////////////////////////////////////////
857	// @ info : pointer on the local boot-info structure.
858	///////////////////////////////////////////////////////////////////////////////////////////
859	void kernel_init( boot_info_t * info )
860	{
861	lid_t core_lid = -1; // running core local index
862	cxy_t core_cxy = -1; // running core cluster identifier
863	gid_t core_gid; // running core hardware identifier
864	cluster_t * cluster; // pointer on local cluster manager
865	core_t * core; // pointer on running core descriptor
866	thread_t * thread; // pointer on idle thread descriptor
867
868	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
869	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
870	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
871	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
872
873	error_t error;
874	reg_t status; // running core status register
875
876	/////////////////////////////////////////////////////////////////////////////////
877	// STEP 0 : Each core get its core identifier from boot_info, and makes
878	// a partial initialisation of its private idle thread descriptor.
879	// CP0 initializes the "local_cxy" global variable.
880	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
881	/////////////////////////////////////////////////////////////////////////////////
882
883	error = get_core_identifiers( info,
884	&core_lid,
885	&core_cxy,
886	&core_gid );
887
888	// CP0 initializes cluster identifier
889	if( core_lid == 0 ) local_cxy = info->cxy;
890
891	// each core gets a pointer on its private idle thread descriptor
892	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
893
894	// each core registers this thread pointer in hardware register
895	hal_set_current_thread( thread );
896
897	// each core register core descriptor pointer in idle thread descriptor
898	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
899
900	// each core initializes the idle thread lists of locks
901	list_root_init( &thread->locks_root );
902	xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) );
903	thread->local_locks = 0;
904	thread->remote_locks = 0;
905
906	// CP0 in cluster 0 initializes TXT0 chdev descriptor
907	if( core_cxy == 0 && core_lid == 0 ) // [MODIF]
908	{
909	if( info->use_mty0 == 1 ) {
910	mtty0_device_init( info );
911	} else {
912	txt0_device_init( info );
913	}
914	}
915	// [FIXME]
916
917	/////////////////////////////////////////////////////////////////////////////////
918	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
919	(info->x_size * (info->y_max)) );
920	barrier_wait( &local_barrier , info->cores_nr );
921	/////////////////////////////////////////////////////////////////////////////////
922
923	#if DEBUG_KERNEL_INIT
924	if( (core_lid == 0) & (local_cxy == 0) )
925	printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / cycle %d\n",
926	__FUNCTION__, (uint32_t)hal_get_cycles() );
927	#endif
928
929	/////////////////////////////////////////////////////////////////////////////
930	// STEP 1 : all cores check core identifier.
931	// CP0 initializes the local cluster manager.
932	// This includes the memory allocators.
933	/////////////////////////////////////////////////////////////////////////////
934
935	// all cores check identifiers
936	if( error )
937	{
938	assert( false ,
939	"illegal core identifiers gid = %x / cxy = %x / lid = %d",
940	core_lid , core_cxy , core_lid );
941	}
942
943	// CP0 initializes cluster manager
944	if( core_lid == 0 )
945	{
946	error = cluster_init( info );
947
948	if( error )
949	{
950	assert( false ,
951	"cannot initialise cluster %x", local_cxy );
952	}
953	}
954
955	/////////////////////////////////////////////////////////////////////////////////
956	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
957	(info->x_size * (info->y_max)) );
958	barrier_wait( &local_barrier , info->cores_nr );
959	/////////////////////////////////////////////////////////////////////////////////
960
961	#if DEBUG_KERNEL_INIT
962	if( (core_lid == 0) & (local_cxy == 0) )
963	printk("\n[DBG] %s : exit barrier 1 : clusters initialised / cycle %d\n",
964	__FUNCTION__, (uint32_t)hal_get_cycles() );
965	#endif
966
967	/////////////////////////////////////////////////////////////////////////////////
968	// STEP 2 : CP0 initializes the process_zero descriptor.
969	// CP0 in cluster 0 initializes the IOPIC device.
970	/////////////////////////////////////////////////////////////////////////////////
971
972	// all cores get pointer on local cluster manager & core descriptor
973	cluster = &cluster_manager;
974	core = &cluster->core_tbl[core_lid];
975
976	// all CP0s initialize the process_zero descriptor
977	if( core_lid == 0 ) process_zero_create( &process_zero );
978
979	// CP0 in cluster 0 initializes the PIC chdev,
980	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
981
982	////////////////////////////////////////////////////////////////////////////////
983	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
984	(info->x_size * (info->y_max)) );
985	barrier_wait( &local_barrier , info->cores_nr );
986	////////////////////////////////////////////////////////////////////////////////
987
988	#if DEBUG_KERNEL_INIT
989	if( (core_lid == 0) & (local_cxy == 0) )
990	printk("\n[DBG] %s : exit barrier 2 : PIC initialised / cycle %d\n",
991	__FUNCTION__, (uint32_t)hal_get_cycles() );
992	#endif
993
994	////////////////////////////////////////////////////////////////////////////////
995	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
996	// CP0 initializes the internal chdev descriptors
997	// CP0 initialize the local external chdev descriptors
998	////////////////////////////////////////////////////////////////////////////////
999
1000	// all CP0s initialize their local LAPIC extension,
1001	if( core_lid == 0 ) lapic_init( info );
1002
1003	// CP0 scan the internal (private) peripherals,
1004	// and allocates memory for the corresponding chdev descriptors.
1005	if( core_lid == 0 ) internal_devices_init( info );
1006
1007
1008	// All CP0s contribute to initialise external peripheral chdev descriptors.
1009	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
1010	// and allocates memory for the chdev descriptors that must be placed
1011	// on the (cxy) cluster according to the global index value.
1012
1013	if( core_lid == 0 ) external_devices_init( info );
1014
1015	/////////////////////////////////////////////////////////////////////////////////
1016	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1017	(info->x_size * (info->y_max)) );
1018	barrier_wait( &local_barrier , info->cores_nr );
1019	/////////////////////////////////////////////////////////////////////////////////
1020
1021	#if DEBUG_KERNEL_INIT
1022	if( (core_lid == 0) & (local_cxy == 0) )
1023	printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / cycle %d\n",
1024	__FUNCTION__, (uint32_t)hal_get_cycles() );
1025	#endif
1026
1027	#if( DEBUG_KERNEL_INIT & 1 )
1028	if( (core_lid == 0) & (local_cxy == 0) )
1029	chdev_dir_display();
1030	#endif
1031
1032	/////////////////////////////////////////////////////////////////////////////////
1033	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
1034	// Alh cores initialize IDLE thread.
1035	// Only CP0 in cluster 0 creates the VFS root inode.
1036	// It access the boot device to initialize the file system context.
1037	/////////////////////////////////////////////////////////////////////////////////
1038
1039	// All cores enable the shared IPI channel
1040	dev_pic_enable_ipi();
1041	hal_enable_irq( &status );
1042
1043	#if DEBUG_KERNEL_INIT
1044	printk("\n[DBG] %s: IPI enabled for core %d cluster %d\n", __FUNCTION__,
1045	core_lid, local_cxy);
1046	#endif
1047
1048	// all cores initialize the idle thread descriptor
1049	thread_idle_init( thread,
1050	THREAD_IDLE,
1051	&thread_idle_func,
1052	NULL,
1053	core_lid );
1054
1055	// all cores unblock idle thread, and register it in scheduler
1056	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1057	core->scheduler.idle = thread;
1058
1059	#if( DEBUG_KERNEL_INIT & 1 )
1060	sched_display( core_lid );
1061	#endif
1062
1063	// CPO in cluster 0 creates the VFS root
1064	if( (core_lid == 0) && (local_cxy == 0 ) )
1065	{
1066	vfs_root_inode_xp = XPTR_NULL;
1067
1068	// File System must be FATFS in this implementation,
1069	// but other File System can be introduced here
1070	if( CONFIG_VFS_ROOT_IS_FATFS )
1071	{
1072	// 1. allocate memory for FATFS context in cluster 0
1073	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1074
1075	assert( (fatfs_ctx != NULL) ,
1076	"cannot create FATFS context in cluster 0\n" );
1077
1078	// 2. access boot device to initialize FATFS context
1079	fatfs_ctx_init( fatfs_ctx );
1080
1081	// 3. get various informations from FATFS context
1082	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1083	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1084	fatfs_ctx->sectors_per_cluster;
1085	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1086
1087	// 4. create VFS root inode in cluster 0
1088	error = vfs_inode_create( XPTR_NULL, // dentry_xp
1089	FS_TYPE_FATFS, // fs_type
1090	INODE_TYPE_DIR, // inode_type
1091	(void *)(intptr_t)root_dir_cluster, // extend
1092	0, // attr
1093	0, // rights
1094	0, // uid
1095	0, // gid
1096	&vfs_root_inode_xp ); // return
1097
1098	assert( (error == 0) ,
1099	"cannot create VFS root inode\n" );
1100
1101	// 5. initialize VFS context for FAT in cluster 0
1102	vfs_ctx_init( FS_TYPE_FATFS, // file system type
1103	0, // attributes
1104	total_clusters,
1105	cluster_size,
1106	vfs_root_inode_xp, // VFS root
1107	fatfs_ctx ); // extend
1108
1109	// 6. check initialisation
1110	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1111	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1112	"illegal value for FATFS context in cluster %x\n", local_cxy );
1113	}
1114	else
1115	{
1116	assert( false ,
1117	"root FS must be FATFS" );
1118	}
1119
1120	// register VFS root inode in process_zero descriptor of cluster 0
1121	process_zero.vfs_root_xp = vfs_root_inode_xp;
1122	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1123	}
1124
1125	/////////////////////////////////////////////////////////////////////////////////
1126	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1127	(info->x_size * (info->y_max)) );
1128	barrier_wait( &local_barrier , info->cores_nr );
1129	/////////////////////////////////////////////////////////////////////////////////
1130
1131	#if DEBUG_KERNEL_INIT
1132	if( (core_lid == 0) & (local_cxy == 0) )
1133	printk("\n[DBG] %s : exit barrier 4 : VFS_root = %l in cluster 0 / cycle %d\n",
1134	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1135	#endif
1136
1137	/////////////////////////////////////////////////////////////////////////////////
1138	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1139	// and initialise both the local FS context and the local VFS context
1140	// from values stored in cluster 0.
1141	// They get the VFS root inode extended pointer from cluster 0.
1142	/////////////////////////////////////////////////////////////////////////////////
1143
1144	if( (core_lid == 0) && (local_cxy != 0) )
1145	{
1146	// File System must be FATFS in this implementation,
1147	// but other File System can be introduced here
1148	if( CONFIG_VFS_ROOT_IS_FATFS )
1149	{
1150	// 1. allocate memory for local FATFS context
1151	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1152
1153	assert( (local_fatfs_ctx != NULL) ,
1154	"cannot create FATFS context in cluster %x\n", local_cxy );
1155
1156	// 2. get local pointer on VFS context for FATFS
1157	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1158
1159	// 3. get local pointer on FATFS context in cluster 0
1160	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1161
1162	// 4. copy FATFS context from cluster 0 to local cluster
1163	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1164	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1165
1166	// 5. copy VFS context from cluster 0 to local cluster
1167	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1168	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1169
1170	// 6. update extend field in local copy of VFS context
1171	vfs_ctx->extend = local_fatfs_ctx;
1172
1173	// 7. check initialisation
1174	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1175	"illegal value for FATFS context in cluster %x\n", local_cxy );
1176	}
1177
1178	// get extended pointer on VFS root inode from cluster 0
1179	vfs_root_inode_xp = hal_remote_lwd( XPTR( 0 , &process_zero.vfs_root_xp ) );
1180
1181	// update local process_zero descriptor
1182	process_zero.vfs_root_xp = vfs_root_inode_xp;
1183	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1184	}
1185
1186	/////////////////////////////////////////////////////////////////////////////////
1187	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1188	(info->x_size * (info->y_max)) );
1189	barrier_wait( &local_barrier , info->cores_nr );
1190	/////////////////////////////////////////////////////////////////////////////////
1191
1192	#if DEBUG_KERNEL_INIT
1193	if( (core_lid == 0) & (local_cxy == 0) )
1194	printk("\n[DBG] %s : exit barrier 5 : VFS_root = %l in cluster 0 / cycle %d\n",
1195	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1196	#endif
1197
1198	/////////////////////////////////////////////////////////////////////////////////
1199	// STEP 6 : CP0 in cluster IO makes the global DEVFS tree initialisation:
1200	// It creates the DEVFS directory "dev", and the DEVFS "external"
1201	// directory in cluster IO and mount these inodes into VFS.
1202	/////////////////////////////////////////////////////////////////////////////////
1203
1204	if( (core_lid == 0) && (local_cxy == 0) ) // [FIXME]
1205	{
1206	// create "dev" and "external" directories.
1207	devfs_global_init( process_zero.vfs_root_xp,
1208	&devfs_dev_inode_xp,
1209	&devfs_external_inode_xp );
1210
1211	// creates the DEVFS context in cluster IO
1212	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1213
1214	assert( (devfs_ctx != NULL) ,
1215	"cannot create DEVFS context in cluster IO\n");
1216
1217	// register DEVFS root and external directories
1218	devfs_ctx_init( devfs_ctx, devfs_dev_inode_xp, devfs_external_inode_xp );
1219	}
1220
1221	/////////////////////////////////////////////////////////////////////////////////
1222	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1223	(info->x_size * (info->y_max)) );
1224	barrier_wait( &local_barrier , info->cores_nr );
1225	/////////////////////////////////////////////////////////////////////////////////
1226
1227	#if DEBUG_KERNEL_INIT
1228	if( (core_lid == 0) & (local_cxy == 0) )
1229	printk("\n[DBG] %s : exit barrier 6 : dev_root = %l in cluster 0 / cycle %d\n",
1230	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1231	#endif
1232
1233	/////////////////////////////////////////////////////////////////////////////////
1234	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1235	// Each CP0 get the "dev" and "external" extended pointers from
1236	// values stored in cluster IO.
1237	// Then each CP0 in cluster(i) creates the DEVFS "internal directory,
1238	// and creates the pseudo-files for all chdevs in cluster (i).
1239	/////////////////////////////////////////////////////////////////////////////////
1240
1241	if( core_lid == 0 )
1242	{
1243	// get extended pointer on "extend" field of VFS context for DEVFS in cluster IO
1244	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend ); // [FIXME]
1245
1246	// get pointer on DEVFS context in cluster 0
1247	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1248
1249	devfs_dev_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1250	devfs_external_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1251
1252	// populate DEVFS in all clusters
1253	devfs_local_init( devfs_dev_inode_xp,
1254	devfs_external_inode_xp,
1255	&devfs_internal_inode_xp );
1256	}
1257
1258	/////////////////////////////////////////////////////////////////////////////////
1259	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1260	(info->x_size * (info->y_max)) );
1261	barrier_wait( &local_barrier , info->cores_nr );
1262	/////////////////////////////////////////////////////////////////////////////////
1263
1264	#if DEBUG_KERNEL_INIT
1265	if( (core_lid == 0) & (local_cxy == 0) )
1266	printk("\n[DBG] %s : exit barrier 7 : dev_root = %l in cluster 0 / cycle %d\n",
1267	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1268	#endif
1269
1270	/////////////////////////////////////////////////////////////////////////////////
1271	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1272	/////////////////////////////////////////////////////////////////////////////////
1273
1274	if( (core_lid == 0) && (local_cxy == 0) )
1275	{
1276
1277	#if( DEBUG_KERNEL_INIT & 1 )
1278	vfs_display( vfs_root_inode_xp );
1279	#endif
1280
1281	process_init_create();
1282	}
1283
1284	/////////////////////////////////////////////////////////////////////////////////
1285	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ), // [FIXME]
1286	(info->x_size * (info->y_max)) );
1287	barrier_wait( &local_barrier , info->cores_nr );
1288	/////////////////////////////////////////////////////////////////////////////////
1289
1290	#if DEBUG_KERNEL_INIT
1291	if( (core_lid == 0) & (local_cxy == 0) )
1292	printk("\n[DBG] %s : exit barrier 8 : process init created / cycle %d\n",
1293	__FUNCTION__ , (uint32_t)hal_get_cycles() );
1294	#endif
1295
1296	#if (DEBUG_KERNEL_INIT & 1)
1297	if( (core_lid == 0) & (local_cxy == 0) )
1298	sched_display( 0 );
1299	#endif
1300
1301	/////////////////////////////////////////////////////////////////////////////////
1302	// STEP 9 : CP0 in cluster 0 print banner
1303	/////////////////////////////////////////////////////////////////////////////////
1304
1305	if( (core_lid == 0) && (local_cxy == 0) ) // [FIXME]
1306	{
1307	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1308
1309	#if( DEBUG_KERNEL_INIT & 1 )
1310	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1311	" - thread descriptor : %d bytes\n"
1312	" - process descriptor : %d bytes\n"
1313	" - cluster manager : %d bytes\n"
1314	" - chdev descriptor : %d bytes\n"
1315	" - core descriptor : %d bytes\n"
1316	" - scheduler : %d bytes\n"
1317	" - rpc fifo : %d bytes\n"
1318	" - page descriptor : %d bytes\n"
1319	" - mapper root : %d bytes\n"
1320	" - ppm manager : %d bytes\n"
1321	" - kcm manager : %d bytes\n"
1322	" - khm manager : %d bytes\n"
1323	" - vmm manager : %d bytes\n"
1324	" - gpt root : %d bytes\n"
1325	" - list item : %d bytes\n"
1326	" - xlist item : %d bytes\n"
1327	" - spinlock : %d bytes\n"
1328	" - remote spinlock : %d bytes\n"
1329	" - rwlock : %d bytes\n"
1330	" - remote rwlock : %d bytes\n",
1331	sizeof( thread_t ),
1332	sizeof( process_t ),
1333	sizeof( cluster_t ),
1334	sizeof( chdev_t ),
1335	sizeof( core_t ),
1336	sizeof( scheduler_t ),
1337	sizeof( remote_fifo_t ),
1338	sizeof( page_t ),
1339	sizeof( mapper_t ),
1340	sizeof( ppm_t ),
1341	sizeof( kcm_t ),
1342	sizeof( khm_t ),
1343	sizeof( vmm_t ),
1344	sizeof( gpt_t ),
1345	sizeof( list_entry_t ),
1346	sizeof( xlist_entry_t ),
1347	sizeof( spinlock_t ),
1348	sizeof( remote_spinlock_t ),
1349	sizeof( rwlock_t ),
1350	sizeof( remote_rwlock_t ));
1351	#endif
1352
1353	}
1354
1355	// each core activates its private TICK IRQ
1356	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1357
1358	#if DEBUG_KERNEL_INIT
1359	printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1360	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1361	#endif
1362
1363	// each core jump to thread_idle_func
1364	thread_idle_func();
1365	}
1366

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