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source: trunk/kernel/kern/kernel_init.c @ 459

Last change on this file since 459 was 457, checked in by alain, 6 years ago
This version modifies the exec syscall and fixes a large number of small bugs. The version number has been updated (0.1)
File size: 53.2 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
123	// these debug variables are used to analyse the sys_read() syscall timing
124
125	#if DEBUG_SYS_READ
126	uint32_t enter_sys_read;
127	uint32_t exit_sys_read;
128
129	uint32_t enter_devfs_read;
130	uint32_t exit_devfs_read;
131
132	uint32_t enter_txt_read;
133	uint32_t exit_txt_read;
134
135	uint32_t enter_chdev_cmd_read;
136	uint32_t exit_chdev_cmd_read;
137
138	uint32_t enter_chdev_server_read;
139	uint32_t exit_chdev_server_read;
140
141	uint32_t enter_tty_cmd_read;
142	uint32_t exit_tty_cmd_read;
143
144	uint32_t enter_tty_isr_read;
145	uint32_t exit_tty_isr_read;
146	#endif
147
148	// these debug variables are used to analyse the sys_write() syscall timing
149
150	#if DEBUG_SYS_WRITE
151	uint32_t enter_sys_write;
152	uint32_t exit_sys_write;
153
154	uint32_t enter_devfs_write;
155	uint32_t exit_devfs_write;
156
157	uint32_t enter_txt_write;
158	uint32_t exit_txt_write;
159
160	uint32_t enter_chdev_cmd_write;
161	uint32_t exit_chdev_cmd_write;
162
163	uint32_t enter_chdev_server_write;
164	uint32_t exit_chdev_server_write;
165
166	uint32_t enter_tty_cmd_write;
167	uint32_t exit_tty_cmd_write;
168
169	uint32_t enter_tty_isr_write;
170	uint32_t exit_tty_isr_write;
171	#endif
172
173	///////////////////////////////////////////////////////////////////////////////////////////
174	// This function displays the ALMOS_MKH banner.
175	///////////////////////////////////////////////////////////////////////////////////////////
176	static void print_banner( uint32_t nclusters , uint32_t ncores )
177	{
178	printk("\n"
179	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
180	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
181	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
182	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
183	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
184	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
185	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
186	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
187	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
188	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
189	CONFIG_ALMOS_VERSION , nclusters , ncores );
190	}
191
192
193	///////////////////////////////////////////////////////////////////////////////////////////
194	// This function initializes the TXT0 chdev descriptor, that is the "kernel terminal",
195	// shared by all kernel instances for debug messages.
196	// It is a global variable (replicated in all clusters), because this terminal is used
197	// before the kmem allocator initialisation, but only the instance in cluster containing
198	// the calling core is registered in the "chdev_dir" directory.
199	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
200	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
201	///////////////////////////////////////////////////////////////////////////////////////////
202	// @ info : pointer on the local boot-info structure.
203	///////////////////////////////////////////////////////////////////////////////////////////
204	static void txt0_device_init( boot_info_t * info )
205	{
206	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
207	uint32_t dev_nr; // actual number of devices in this cluster
208	xptr_t base; // remote pointer on segment base
209	uint32_t func; // device functional index
210	uint32_t impl; // device implementation index
211	uint32_t i; // device index in dev_tbl
212	uint32_t x; // X cluster coordinate
213	uint32_t y; // Y cluster coordinate
214	uint32_t channels; // number of channels
215
216	// get number of peripherals and base of devices array from boot_info
217	dev_nr = info->ext_dev_nr;
218	dev_tbl = info->ext_dev;
219
220	// loop on external peripherals to find TXT device
221	for( i = 0 ; i < dev_nr ; i++ )
222	{
223	base = dev_tbl[i].base;
224	func = FUNC_FROM_TYPE( dev_tbl[i].type );
225	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
226	channels = dev_tbl[i].channels;
227
228	if (func == DEV_FUNC_TXT )
229	{
230	assert( (channels > 0) , __FUNCTION__ , "number of TXT channels cannot be 0\n");
231
232	// initializes TXT_TX[0] chdev
233	txt0_chdev.func = func;
234	txt0_chdev.impl = impl;
235	txt0_chdev.channel = 0;
236	txt0_chdev.base = base;
237	txt0_chdev.is_rx = false;
238
239	// initializes lock
240	remote_spinlock_init( XPTR( local_cxy , &txt0_chdev.wait_lock ) );
241
242	// TXT specific initialisation:
243	// no server thread & no IRQ routing for channel 0
244	dev_txt_init( &txt0_chdev );
245
246	// register the TXT0 in all chdev_dir[x][y] structures
247	for( x = 0 ; x < info->x_size ; x++ )
248	{
249	for( y = 0 ; y < info->y_size ; y++ )
250	{
251	cxy_t cxy = (x<<info->y_width) + y;
252	hal_remote_swd( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
253	XPTR( local_cxy , &txt0_chdev ) );
254	}
255	}
256	}
257	} // end loop on devices
258	} // end txt0_device_init()
259
260	///////////////////////////////////////////////////////////////////////////////////////////
261	// This function allocates memory and initializes the chdev descriptors for the internal
262	// peripherals contained in the local cluster, other than the LAPIC, as specified by
263	// the boot_info, including the linking with the driver for the specified implementation.
264	// The relevant entries in all copies of the devices directory are initialised.
265	///////////////////////////////////////////////////////////////////////////////////////////
266	// @ info : pointer on the local boot-info structure.
267	///////////////////////////////////////////////////////////////////////////////////////////
268	static void internal_devices_init( boot_info_t * info )
269	{
270	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
271	uint32_t dev_nr; // actual number of devices in this cluster
272	xptr_t base; // remote pointer on segment base
273	uint32_t func; // device functionnal index
274	uint32_t impl; // device implementation index
275	uint32_t i; // device index in dev_tbl
276	uint32_t x; // X cluster coordinate
277	uint32_t y; // Y cluster coordinate
278	uint32_t channels; // number of channels
279	uint32_t channel; // channel index
280	chdev_t * chdev_ptr; // local pointer on created chdev
281
282	// get number of internal peripherals and base from boot_info
283	dev_nr = info->int_dev_nr;
284	dev_tbl = info->int_dev;
285
286	// loop on internal peripherals
287	for( i = 0 ; i < dev_nr ; i++ )
288	{
289	base = dev_tbl[i].base;
290	channels = dev_tbl[i].channels;
291	func = FUNC_FROM_TYPE( dev_tbl[i].type );
292	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
293
294	//////////////////////////
295	if( func == DEV_FUNC_MMC )
296	{
297	assert( (channels == 1) , __FUNCTION__ ,
298	"MMC device must be single channel\n" );
299
300	// create chdev in local cluster
301	chdev_ptr = chdev_create( func,
302	impl,
303	0, // channel
304	false, // direction
305	base );
306
307	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
308	"cannot allocate memory for MMC chdev\n" );
309
310	// make MMC specific initialisation
311	dev_mmc_init( chdev_ptr );
312
313	// set the MMC field in all chdev_dir[x][y] structures
314	for( x = 0 ; x < info->x_size ; x++ )
315	{
316	for( y = 0 ; y < info->y_size ; y++ )
317	{
318	cxy_t cxy = (x<<info->y_width) + y;
319	hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
320	XPTR( local_cxy , chdev_ptr ) );
321	}
322	}
323
324	#if( DEBUG_KERNEL_INIT & 0x1 )
325	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
326	printk("\n[DBG] %s : created MMC in cluster %x / chdev = %x\n",
327	__FUNCTION__ , local_cxy , chdev_ptr );
328	#endif
329	}
330	///////////////////////////////
331	else if( func == DEV_FUNC_DMA )
332	{
333	// create one chdev per channel in local cluster
334	for( channel = 0 ; channel < channels ; channel++ )
335	{
336	// create chdev[channel] in local cluster
337	chdev_ptr = chdev_create( func,
338	impl,
339	channel,
340	false, // direction
341	base );
342
343	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
344	"cannot allocate memory for DMA chdev" );
345
346	// make DMA specific initialisation
347	dev_dma_init( chdev_ptr );
348
349	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
350	// structure because the DMA device is not remotely accessible.
351	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
352
353	#if( DEBUG_KERNEL_INIT & 0x1 )
354	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
355	printk("\n[DBG] %s : created DMA[%d] in cluster %x / chdev = %x\n",
356	__FUNCTION__ , channel , local_cxy , chdev_ptr );
357	#endif
358	}
359	}
360	}
361	} // end internal_devices_init()
362
363	///////////////////////////////////////////////////////////////////////////////////////////
364	// This function allocates memory and initializes the chdev descriptors for the
365	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
366	// This includes the dynamic linking with the driver for the specified implementation.
367	// These chdev descriptors are distributed on all clusters, using a modulo on a global
368	// index, identically computed in all clusters.
369	// This function is executed in all clusters by the CP0 core, that computes a global index
370	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
371	// the local cluster, because the global index matches the local index.
372	// The relevant entries in all copies of the devices directory are initialised.
373	///////////////////////////////////////////////////////////////////////////////////////////
374	// @ info : pointer on the local boot-info structure.
375	///////////////////////////////////////////////////////////////////////////////////////////
376	static void external_devices_init( boot_info_t * info )
377	{
378	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
379	uint32_t dev_nr; // actual number of external devices
380	xptr_t base; // remote pointer on segment base
381	uint32_t func; // device functionnal index
382	uint32_t impl; // device implementation index
383	uint32_t i; // device index in dev_tbl
384	uint32_t x; // X cluster coordinate
385	uint32_t y; // Y cluster coordinate
386	uint32_t channels; // number of channels
387	uint32_t channel; // channel index
388	uint32_t directions; // number of directions (1 or 2)
389	uint32_t rx; // direction index (0 or 1)
390	chdev_t * chdev; // local pointer on one channel_device descriptor
391	uint32_t ext_chdev_gid; // global index of external chdev
392
393	// get number of peripherals and base of devices array from boot_info
394	dev_nr = info->ext_dev_nr;
395	dev_tbl = info->ext_dev;
396
397	// initializes global index (PIC is already placed in cluster 0
398	ext_chdev_gid = 1;
399
400	// loop on external peripherals
401	for( i = 0 ; i < dev_nr ; i++ )
402	{
403	base = dev_tbl[i].base;
404	channels = dev_tbl[i].channels;
405	func = FUNC_FROM_TYPE( dev_tbl[i].type );
406	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
407
408	// There is one chdev per direction for NIC and for TXT
409	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
410	else directions = 1;
411
412	// do nothing for ROM, that does not require a device descriptor.
413	if( func == DEV_FUNC_ROM ) continue;
414
415	// do nothing for PIC, that is already initialized
416	if( func == DEV_FUNC_PIC ) continue;
417
418	// check PIC device initialized
419	assert( (chdev_dir.pic != XPTR_NULL ) , __FUNCTION__ ,
420	"PIC device must be initialized before other devices\n" );
421
422	// check external device functionnal type
423	assert( ( (func == DEV_FUNC_IOB) \|\|
424	(func == DEV_FUNC_IOC) \|\|
425	(func == DEV_FUNC_TXT) \|\|
426	(func == DEV_FUNC_NIC) \|\|
427	(func == DEV_FUNC_FBF) ) , __FUNCTION__ ,
428	"undefined external peripheral type\n" );
429
430	// loops on channels
431	for( channel = 0 ; channel < channels ; channel++ )
432	{
433	// loop on directions
434	for( rx = 0 ; rx < directions ; rx++ )
435	{
436	// skip TXT_TX[0] chdev that has already been created & registered
437	if( (func == DEV_FUNC_TXT) && (channel == 0) && (rx == 0) ) continue;
438
439	// compute target cluster for chdev[func,channel,direction]
440	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
441	uint32_t cx = offset / info->y_size;
442	uint32_t cy = offset % info->y_size;
443	uint32_t target_cxy = (cx<<info->y_width) + cy;
444
445	// allocate and initialize a local chdev
446	// when local cluster matches target cluster
447	if( target_cxy == local_cxy )
448	{
449	chdev = chdev_create( func,
450	impl,
451	channel,
452	rx, // direction
453	base );
454
455	assert( (chdev != NULL), __FUNCTION__ ,
456	"cannot allocate external device" );
457
458	// make device type specific initialisation
459	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
460	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
461	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
462	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
463	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
464
465	// all external (shared) devices are remotely accessible
466	// initialize the replicated chdev_dir[x][y] structures
467	// defining the extended pointers on chdev descriptors
468	xptr_t * entry;
469
470	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
471	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
472	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
473	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
474	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
475	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
476	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
477
478	for( x = 0 ; x < info->x_size ; x++ )
479	{
480	for( y = 0 ; y < info->y_size ; y++ )
481	{
482	cxy_t cxy = (x<<info->y_width) + y;
483	hal_remote_swd( XPTR( cxy , entry ),
484	XPTR( local_cxy , chdev ) );
485	}
486	}
487
488	#if( DEBUG_KERNEL_INIT & 0x1 )
489	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
490	printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
491	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
492	#endif
493	} // end if match
494
495	// increment chdev global index (matching or not)
496	ext_chdev_gid++;
497
498	} // end loop on directions
499	} // end loop on channels
500	} // end loop on devices
501	} // end external_devices_init()
502
503	///////////////////////////////////////////////////////////////////////////////////////////
504	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
505	// device, namely the informations attached to the external IOPIC controller, that
506	// must be replicated in all clusters (struct iopic_input).
507	// This initialisation must be done before other devices initialisation because the IRQ
508	// routing infrastructure is required for both internal and external devices init.
509	///////////////////////////////////////////////////////////////////////////////////////////
510	// @ info : pointer on the local boot-info structure.
511	///////////////////////////////////////////////////////////////////////////////////////////
512	static void iopic_init( boot_info_t * info )
513	{
514	boot_device_t * dev_tbl; // pointer on boot_info external devices array
515	uint32_t dev_nr; // actual number of external devices
516	xptr_t base; // remote pointer on segment base
517	uint32_t func; // device functionnal index
518	uint32_t impl; // device implementation index
519	uint32_t i; // device index in dev_tbl
520	uint32_t x; // cluster X coordinate
521	uint32_t y; // cluster Y coordinate
522	bool_t found; // IOPIC found
523	chdev_t * chdev; // pointer on PIC chdev descriptor
524
525	// get number of external peripherals and base of array from boot_info
526	dev_nr = info->ext_dev_nr;
527	dev_tbl = info->ext_dev;
528
529	// loop on external peripherals to get the IOPIC
530	for( i = 0 , found = false ; i < dev_nr ; i++ )
531	{
532	func = FUNC_FROM_TYPE( dev_tbl[i].type );
533
534	if( func == DEV_FUNC_PIC )
535	{
536	base = dev_tbl[i].base;
537	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
538	found = true;
539	break;
540	}
541	}
542
543	assert( found , __FUNCTION__ , "PIC device not found\n" );
544
545	// allocate and initialize the PIC chdev in cluster 0
546	chdev = chdev_create( DEV_FUNC_PIC,
547	impl,
548	0, // channel
549	0, // direction,
550	base );
551
552	assert( (chdev != NULL), __FUNCTION__ , "no memory for PIC chdev\n" );
553
554	// make PIC device type specific initialisation
555	dev_pic_init( chdev );
556
557	// register, in all clusters, the extended pointer
558	// on PIC chdev in "chdev_dir" array
559	xptr_t * entry = &chdev_dir.pic;
560
561	for( x = 0 ; x < info->x_size ; x++ )
562	{
563	for( y = 0 ; y < info->y_size ; y++ )
564	{
565	cxy_t cxy = (x<<info->y_width) + y;
566	hal_remote_swd( XPTR( cxy , entry ) ,
567	XPTR( local_cxy , chdev ) );
568	}
569	}
570
571	// initialize, in all clusters, the "iopic_input" structure
572	// defining how external IRQs are connected to IOPIC
573
574	// register default value for unused inputs
575	for( x = 0 ; x < info->x_size ; x++ )
576	{
577	for( y = 0 ; y < info->y_size ; y++ )
578	{
579	cxy_t cxy = (x<<info->y_width) + y;
580	hal_remote_memset( XPTR( cxy , &iopic_input ) , 0xFF , sizeof(iopic_input_t) );
581	}
582	}
583
584	// register input IRQ index for valid inputs
585	uint32_t id; // input IRQ index
586	uint8_t valid; // input IRQ is connected
587	uint32_t type; // source device type
588	uint8_t channel; // source device channel
589	uint8_t is_rx; // source device direction
590	uint32_t * ptr; // local pointer on one field in iopic_input stucture
591
592	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
593	{
594	valid = dev_tbl[i].irq[id].valid;
595	type = dev_tbl[i].irq[id].dev_type;
596	channel = dev_tbl[i].irq[id].channel;
597	is_rx = dev_tbl[i].irq[id].is_rx;
598	func = FUNC_FROM_TYPE( type );
599
600	// get pointer on relevant field in iopic_input
601	if( valid )
602	{
603	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
604	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
605	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
606	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
607	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
608	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
609	else assert( false , __FUNCTION__ , "illegal source device for IOPIC input" );
610
611	// set one entry in all "iopic_input" structures
612	for( x = 0 ; x < info->x_size ; x++ )
613	{
614	for( y = 0 ; y < info->y_size ; y++ )
615	{
616	cxy_t cxy = (x<<info->y_width) + y;
617	hal_remote_swd( XPTR( cxy , ptr ) , id );
618	}
619	}
620	}
621	}
622
623	#if( DEBUG_KERNEL_INIT & 0x1 )
624	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
625	{
626	printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
627	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
628	dev_pic_inputs_display();
629	}
630	#endif
631
632	} // end iopic_init()
633
634	///////////////////////////////////////////////////////////////////////////////////////////
635	// This function is called by all CP0s in all cluster to complete the PIC device
636	// initialisation, namely the informations attached to the LAPIC controller.
637	// This initialisation must be done after the IOPIC initialisation, but before other
638	// devices initialisation because the IRQ routing infrastructure is required for both
639	// internal and external devices initialisation.
640	///////////////////////////////////////////////////////////////////////////////////////////
641	// @ info : pointer on the local boot-info structure.
642	///////////////////////////////////////////////////////////////////////////////////////////
643	static void lapic_init( boot_info_t * info )
644	{
645	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
646	uint32_t dev_nr; // number of internal devices
647	uint32_t i; // device index in dev_tbl
648	xptr_t base; // remote pointer on segment base
649	uint32_t func; // device functionnal type in boot_info
650	bool_t found; // LAPIC found
651
652	// get number of internal peripherals and base
653	dev_nr = info->int_dev_nr;
654	dev_tbl = info->int_dev;
655
656	// loop on internal peripherals to get the lapic device
657	for( i = 0 , found = false ; i < dev_nr ; i++ )
658	{
659	func = FUNC_FROM_TYPE( dev_tbl[i].type );
660
661	if( func == DEV_FUNC_ICU )
662	{
663	base = dev_tbl[i].base;
664	found = true;
665	break;
666	}
667	}
668
669	// if the LAPIC controller is not defined in the boot_info,
670	// we simply don't initialize the PIC extensions in the kernel,
671	// making the assumption that the LAPIC related informations
672	// are hidden in the hardware specific PIC driver.
673	if( found )
674	{
675	// initialise the PIC extensions for
676	// the core descriptor and core manager extensions
677	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
678
679	// initialize the "lapic_input" structure
680	// defining how internal IRQs are connected to LAPIC
681	uint32_t id;
682	uint8_t valid;
683	uint8_t channel;
684	uint32_t func;
685
686	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
687	{
688	valid = dev_tbl[i].irq[id].valid;
689	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
690	channel = dev_tbl[i].irq[id].channel;
691
692	if( valid ) // only valid local IRQs are registered
693	{
694	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
695	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
696	else assert( false , __FUNCTION__ , "illegal source device for LAPIC input" );
697	}
698	}
699	}
700	} // end lapic_init()
701
702	///////////////////////////////////////////////////////////////////////////////////////////
703	// This static function returns the identifiers of the calling core.
704	///////////////////////////////////////////////////////////////////////////////////////////
705	// @ info : pointer on boot_info structure.
706	// @ lid : [out] core local index in cluster.
707	// @ cxy : [out] cluster identifier.
708	// @ lid : [out] core global identifier (hardware).
709	// @ return 0 if success / return EINVAL if not found.
710	///////////////////////////////////////////////////////////////////////////////////////////
711	static error_t get_core_identifiers( boot_info_t * info,
712	lid_t * lid,
713	cxy_t * cxy,
714	gid_t * gid )
715	{
716	uint32_t i;
717	gid_t global_id;
718
719	// get global identifier from hardware register
720	global_id = hal_get_gid();
721
722	// makes an associative search in boot_info to get (cxy,lid) from global_id
723	for( i = 0 ; i < info->cores_nr ; i++ )
724	{
725	if( global_id == info->core[i].gid )
726	{
727	*lid = info->core[i].lid;
728	*cxy = info->core[i].cxy;
729	*gid = global_id;
730	return 0;
731	}
732	}
733	return EINVAL;
734	}
735
736	///////////////////////////////////////////////////////////////////////////////////////////
737	// This function is the entry point for the kernel initialisation.
738	// It is executed by all cores in all clusters, but only core[0], called CP0,
739	// initializes the shared resources such as the cluster manager, or the local peripherals.
740	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
741	// only information contained in the local boot_info_t structure, set by the bootloader.
742	// Only CP0 in cluster 0 print the log messages.
743	///////////////////////////////////////////////////////////////////////////////////////////
744	// @ info : pointer on the local boot-info structure.
745	///////////////////////////////////////////////////////////////////////////////////////////
746	void kernel_init( boot_info_t * info )
747	{
748	lid_t core_lid = -1; // running core local index
749	cxy_t core_cxy = -1; // running core cluster identifier
750	gid_t core_gid; // running core hardware identifier
751	cluster_t * cluster; // pointer on local cluster manager
752	core_t * core; // pointer on running core descriptor
753	thread_t * thread; // pointer on idle thread descriptor
754
755	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
756	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
757	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
758	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
759
760	error_t error;
761	reg_t status; // running core status register
762
763	/////////////////////////////////////////////////////////////////////////////////
764	// STEP 0 : Each core get its core identifier from boot_info, and makes
765	// a partial initialisation of its private idle thread descriptor.
766	// CP0 initializes the "local_cxy" global variable.
767	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
768	/////////////////////////////////////////////////////////////////////////////////
769
770	error = get_core_identifiers( info,
771	&core_lid,
772	&core_cxy,
773	&core_gid );
774
775	// CP0 initializes cluster identifier
776	if( core_lid == 0 ) local_cxy = info->cxy;
777
778	// each core gets a pointer on its private idle thread descriptor
779	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
780
781	// each core registers this thread pointer in hardware register
782	hal_set_current_thread( thread );
783
784	// each core register core descriptor pointer in idle thread descriptor
785	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
786
787	// each core initializes the idle thread lists of locks
788	list_root_init( &thread->locks_root );
789	xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) );
790	thread->local_locks = 0;
791	thread->remote_locks = 0;
792
793	// CP0 in cluster 0 initialises TXT0 chdev descriptor
794	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
795
796	/////////////////////////////////////////////////////////////////////////////////
797	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
798	(info->x_size * info->y_size) );
799	barrier_wait( &local_barrier , info->cores_nr );
800	/////////////////////////////////////////////////////////////////////////////////
801
802	#if DEBUG_KERNEL_INIT
803	if( (core_lid == 0) & (local_cxy == 0) )
804	printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / cycle %d\n",
805	__FUNCTION__, (uint32_t)hal_get_cycles() );
806	#endif
807
808	/////////////////////////////////////////////////////////////////////////////
809	// STEP 1 : all cores check core identifier.
810	// CP0 initializes the local cluster manager.
811	// This includes the memory allocators.
812	/////////////////////////////////////////////////////////////////////////////
813
814	// all cores check identifiers
815	if( error )
816	{
817	assert( false , __FUNCTION__ ,
818	"illegal core identifiers gid = %x / cxy = %x / lid = %d",
819	core_lid , core_cxy , core_lid );
820	}
821
822	// CP0 initializes cluster manager
823	if( core_lid == 0 )
824	{
825	error = cluster_init( info );
826
827	if( error )
828	{
829	assert( false , __FUNCTION__ ,
830	"cannot initialise cluster %x", local_cxy );
831	}
832	}
833
834	/////////////////////////////////////////////////////////////////////////////////
835	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
836	(info->x_size * info->y_size) );
837	barrier_wait( &local_barrier , info->cores_nr );
838	/////////////////////////////////////////////////////////////////////////////////
839
840	#if DEBUG_KERNEL_INIT
841	if( (core_lid == 0) & (local_cxy == 0) )
842	printk("\n[DBG] %s : exit barrier 1 : clusters initialised / cycle %d\n",
843	__FUNCTION__, (uint32_t)hal_get_cycles() );
844	#endif
845
846	/////////////////////////////////////////////////////////////////////////////////
847	// STEP 2 : CP0 initializes the process_zero descriptor.
848	// CP0 in cluster 0 initializes the IOPIC device.
849	/////////////////////////////////////////////////////////////////////////////////
850
851	// all cores get pointer on local cluster manager & core descriptor
852	cluster = &cluster_manager;
853	core = &cluster->core_tbl[core_lid];
854
855	// all CP0s initialize the process_zero descriptor
856	if( core_lid == 0 ) process_zero_create( &process_zero );
857
858	// CP0 in cluster 0 initializes the PIC chdev,
859	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
860
861	////////////////////////////////////////////////////////////////////////////////
862	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
863	(info->x_size * info->y_size) );
864	barrier_wait( &local_barrier , info->cores_nr );
865	////////////////////////////////////////////////////////////////////////////////
866
867	#if DEBUG_KERNEL_INIT
868	if( (core_lid == 0) & (local_cxy == 0) )
869	printk("\n[DBG] %s : exit barrier 2 : PIC initialised / cycle %d\n",
870	__FUNCTION__, (uint32_t)hal_get_cycles() );
871	#endif
872
873	////////////////////////////////////////////////////////////////////////////////
874	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
875	// CP0 initializes the internal chdev descriptors
876	// CP0 initialize the local external chdev descriptors
877	////////////////////////////////////////////////////////////////////////////////
878
879	// all CP0s initialize their local LAPIC extension,
880	if( core_lid == 0 ) lapic_init( info );
881
882	// CP0 scan the internal (private) peripherals,
883	// and allocates memory for the corresponding chdev descriptors.
884	if( core_lid == 0 ) internal_devices_init( info );
885
886
887	// All CP0s contribute to initialise external peripheral chdev descriptors.
888	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
889	// and allocates memory for the chdev descriptors that must be placed
890	// on the (cxy) cluster according to the global index value.
891
892	if( core_lid == 0 ) external_devices_init( info );
893
894	/////////////////////////////////////////////////////////////////////////////////
895	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
896	(info->x_size * info->y_size) );
897	barrier_wait( &local_barrier , info->cores_nr );
898	/////////////////////////////////////////////////////////////////////////////////
899
900	#if DEBUG_KERNEL_INIT
901	if( (core_lid == 0) & (local_cxy == 0) )
902	printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / cycle %d\n",
903	__FUNCTION__, (uint32_t)hal_get_cycles() );
904	#endif
905
906	#if( DEBUG_KERNEL_INIT & 1 )
907	if( (core_lid == 0) & (local_cxy == 0) )
908	chdev_dir_display();
909	#endif
910
911	/////////////////////////////////////////////////////////////////////////////////
912	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
913	// Alh cores initialize IDLE thread.
914	// Only CP0 in cluster 0 creates the VFS root inode.
915	// It access the boot device to initialize the file system context.
916	/////////////////////////////////////////////////////////////////////////////////
917
918	// All cores enable the shared IPI channel
919	dev_pic_enable_ipi();
920	hal_enable_irq( &status );
921
922	// all cores initialize the idle thread descriptor
923	thread_idle_init( thread,
924	THREAD_IDLE,
925	&thread_idle_func,
926	NULL,
927	core_lid );
928
929	// all cores unblock idle thread, and register it in scheduler
930	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
931	core->scheduler.idle = thread;
932
933	#if( DEBUG_KERNEL_INIT & 1 )
934	sched_display( core_lid );
935	#endif
936
937	// CPO in cluster 0 creates the VFS root
938	if( (core_lid == 0) && (local_cxy == 0 ) )
939	{
940	vfs_root_inode_xp = XPTR_NULL;
941
942	// File System must be FATFS in this implementation,
943	// but other File System can be introduced here
944	if( CONFIG_VFS_ROOT_IS_FATFS )
945	{
946	// 1. allocate memory for FATFS context in cluster 0
947	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
948
949	assert( (fatfs_ctx != NULL) , __FUNCTION__ ,
950	"cannot create FATFS context in cluster 0\n" );
951
952	// 2. access boot device to initialize FATFS context
953	fatfs_ctx_init( fatfs_ctx );
954
955	// 3. get various informations from FATFS context
956	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
957	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
958	fatfs_ctx->sectors_per_cluster;
959	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
960
961	// 4. create VFS root inode in cluster 0
962	error = vfs_inode_create( XPTR_NULL, // dentry_xp
963	FS_TYPE_FATFS, // fs_type
964	INODE_TYPE_DIR, // inode_type
965	(void *)(intptr_t)root_dir_cluster, // extend
966	0, // attr
967	0, // rights
968	0, // uid
969	0, // gid
970	&vfs_root_inode_xp ); // return
971
972	assert( (error == 0) , __FUNCTION__ ,
973	"cannot create VFS root inode\n" );
974
975	// 5. initialize VFS context for FAT in cluster 0
976	vfs_ctx_init( FS_TYPE_FATFS, // file system type
977	0, // attributes
978	total_clusters,
979	cluster_size,
980	vfs_root_inode_xp, // VFS root
981	fatfs_ctx ); // extend
982
983	// 6. check initialisation
984	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
985	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
986	__FUNCTION__ , "illegal value for FATFS context in cluster %x\n", local_cxy );
987	}
988	else
989	{
990	assert( false , __FUNCTION__ ,
991	"root FS must be FATFS" );
992	}
993
994	// register VFS root inode in process_zero descriptor of cluster 0
995	process_zero.vfs_root_xp = vfs_root_inode_xp;
996	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
997	}
998
999	/////////////////////////////////////////////////////////////////////////////////
1000	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1001	(info->x_size * info->y_size) );
1002	barrier_wait( &local_barrier , info->cores_nr );
1003	/////////////////////////////////////////////////////////////////////////////////
1004
1005	#if DEBUG_KERNEL_INIT
1006	if( (core_lid == 0) & (local_cxy == 0) )
1007	printk("\n[DBG] %s : exit barrier 4 : VFS_root = %l in cluster 0 / cycle %d\n",
1008	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1009	#endif
1010
1011	/////////////////////////////////////////////////////////////////////////////////
1012	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1013	// and initialise both the local FS context and the local VFS context
1014	// from values stored in cluster 0.
1015	// They get the VFS root inode extended pointer from cluster 0.
1016	/////////////////////////////////////////////////////////////////////////////////
1017
1018	if( (core_lid == 0) && (local_cxy != 0) )
1019	{
1020	// File System must be FATFS in this implementation,
1021	// but other File System can be introduced here
1022	if( CONFIG_VFS_ROOT_IS_FATFS )
1023	{
1024	// 1. allocate memory for local FATFS context
1025	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1026
1027	assert( (local_fatfs_ctx != NULL) , __FUNCTION__ ,
1028	"cannot create FATFS context in cluster %x\n", local_cxy );
1029
1030	// 2. get local pointer on VFS context for FATFS
1031	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1032
1033	// 3. get local pointer on FATFS context in cluster 0
1034	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1035
1036	// 4. copy FATFS context from cluster 0 to local cluster
1037	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1038	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1039
1040	// 5. copy VFS context from cluster 0 to local cluster
1041	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1042	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1043
1044	// 6. update extend field in local copy of VFS context
1045	vfs_ctx->extend = local_fatfs_ctx;
1046
1047	// 7. check initialisation
1048	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1049	__FUNCTION__ , "illegal value for FATFS context in cluster %x\n", local_cxy );
1050	}
1051
1052	// get extended pointer on VFS root inode from cluster 0
1053	vfs_root_inode_xp = hal_remote_lwd( XPTR( 0 , &process_zero.vfs_root_xp ) );
1054
1055	// update local process_zero descriptor
1056	process_zero.vfs_root_xp = vfs_root_inode_xp;
1057	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1058	}
1059
1060	/////////////////////////////////////////////////////////////////////////////////
1061	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1062	(info->x_size * info->y_size) );
1063	barrier_wait( &local_barrier , info->cores_nr );
1064	/////////////////////////////////////////////////////////////////////////////////
1065
1066	#if DEBUG_KERNEL_INIT
1067	if( (core_lid == 0) & (local_cxy == 0) )
1068	printk("\n[DBG] %s : exit barrier 5 : VFS_root = %l in cluster 0 / cycle %d\n",
1069	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1070	#endif
1071
1072	/////////////////////////////////////////////////////////////////////////////////
1073	// STEP 6 : CP0 in cluster IO makes the global DEVFS tree initialisation:
1074	// It creates the DEVFS directory "dev", and the DEVFS "external"
1075	// directory in cluster IO and mount these inodes into VFS.
1076	/////////////////////////////////////////////////////////////////////////////////
1077
1078	if( (core_lid == 0) && (local_cxy == 0) )
1079	{
1080	// create "dev" and "external" directories.
1081	devfs_global_init( process_zero.vfs_root_xp,
1082	&devfs_dev_inode_xp,
1083	&devfs_external_inode_xp );
1084
1085	// creates the DEVFS context in cluster IO
1086	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1087
1088	assert( (devfs_ctx != NULL) , __FUNCTION__ ,
1089	"cannot create DEVFS context in cluster IO\n");
1090
1091	// register DEVFS root and external directories
1092	devfs_ctx_init( devfs_ctx, devfs_dev_inode_xp, devfs_external_inode_xp );
1093	}
1094
1095	/////////////////////////////////////////////////////////////////////////////////
1096	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1097	(info->x_size * info->y_size) );
1098	barrier_wait( &local_barrier , info->cores_nr );
1099	/////////////////////////////////////////////////////////////////////////////////
1100
1101	#if DEBUG_KERNEL_INIT
1102	if( (core_lid == 0) & (local_cxy == 0) )
1103	printk("\n[DBG] %s : exit barrier 6 : dev_root = %l in cluster 0 / cycle %d\n",
1104	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1105	#endif
1106
1107	/////////////////////////////////////////////////////////////////////////////////
1108	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1109	// Each CP0 get the "dev" and "external" extended pointers from
1110	// values stored in cluster IO.
1111	// Then each CP0 in cluster(i) creates the DEVFS "internal directory,
1112	// and creates the pseudo-files for all chdevs in cluster (i).
1113	/////////////////////////////////////////////////////////////////////////////////
1114
1115	if( core_lid == 0 )
1116	{
1117	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1118	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1119
1120	// get pointer on DEVFS context in cluster 0
1121	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1122
1123	devfs_dev_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1124	devfs_external_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1125
1126	// populate DEVFS in all clusters
1127	devfs_local_init( devfs_dev_inode_xp,
1128	devfs_external_inode_xp,
1129	&devfs_internal_inode_xp );
1130	}
1131
1132	/////////////////////////////////////////////////////////////////////////////////
1133	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1134	(info->x_size * info->y_size) );
1135	barrier_wait( &local_barrier , info->cores_nr );
1136	/////////////////////////////////////////////////////////////////////////////////
1137
1138	#if DEBUG_KERNEL_INIT
1139	if( (core_lid == 0) & (local_cxy == 0) )
1140	printk("\n[DBG] %s : exit barrier 7 : dev_root = %l in cluster 0 / cycle %d\n",
1141	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1142	#endif
1143
1144	/////////////////////////////////////////////////////////////////////////////////
1145	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1146	/////////////////////////////////////////////////////////////////////////////////
1147
1148	if( (core_lid == 0) && (local_cxy == 0) )
1149	{
1150
1151	#if( DEBUG_KERNEL_INIT & 1 )
1152	vfs_display( vfs_root_inode_xp );
1153	#endif
1154
1155	process_init_create();
1156	}
1157
1158	/////////////////////////////////////////////////////////////////////////////////
1159	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1160	(info->x_size * info->y_size) );
1161	barrier_wait( &local_barrier , info->cores_nr );
1162	/////////////////////////////////////////////////////////////////////////////////
1163
1164	#if DEBUG_KERNEL_INIT
1165	if( (core_lid == 0) & (local_cxy == 0) )
1166	printk("\n[DBG] %s : exit barrier 8 : process init created / cycle %d\n",
1167	__FUNCTION__ , (uint32_t)hal_get_cycles() );
1168	#endif
1169
1170	#if (DEBUG_KERNEL_INIT & 1)
1171	if( (core_lid == 0) & (local_cxy == 0) )
1172	sched_display( 0 );
1173	#endif
1174
1175	/////////////////////////////////////////////////////////////////////////////////
1176	// STEP 9 : CP0 in cluster 0 print banner
1177	/////////////////////////////////////////////////////////////////////////////////
1178
1179	if( (core_lid == 0) && (local_cxy == 0) )
1180	{
1181	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1182
1183	#if( DEBUG_KERNEL_INIT & 1 )
1184	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1185	" - thread descriptor : %d bytes\n"
1186	" - process descriptor : %d bytes\n"
1187	" - cluster manager : %d bytes\n"
1188	" - chdev descriptor : %d bytes\n"
1189	" - core descriptor : %d bytes\n"
1190	" - scheduler : %d bytes\n"
1191	" - rpc fifo : %d bytes\n"
1192	" - page descriptor : %d bytes\n"
1193	" - mapper root : %d bytes\n"
1194	" - ppm manager : %d bytes\n"
1195	" - kcm manager : %d bytes\n"
1196	" - khm manager : %d bytes\n"
1197	" - vmm manager : %d bytes\n"
1198	" - gpt root : %d bytes\n"
1199	" - list item : %d bytes\n"
1200	" - xlist item : %d bytes\n"
1201	" - spinlock : %d bytes\n"
1202	" - remote spinlock : %d bytes\n"
1203	" - rwlock : %d bytes\n"
1204	" - remote rwlock : %d bytes\n",
1205	sizeof( thread_t ),
1206	sizeof( process_t ),
1207	sizeof( cluster_t ),
1208	sizeof( chdev_t ),
1209	sizeof( core_t ),
1210	sizeof( scheduler_t ),
1211	sizeof( remote_fifo_t ),
1212	sizeof( page_t ),
1213	sizeof( mapper_t ),
1214	sizeof( ppm_t ),
1215	sizeof( kcm_t ),
1216	sizeof( khm_t ),
1217	sizeof( vmm_t ),
1218	sizeof( gpt_t ),
1219	sizeof( list_entry_t ),
1220	sizeof( xlist_entry_t ),
1221	sizeof( spinlock_t ),
1222	sizeof( remote_spinlock_t ),
1223	sizeof( rwlock_t ),
1224	sizeof( remote_rwlock_t ));
1225	#endif
1226
1227	}
1228
1229	// each core activates its private TICK IRQ
1230	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1231
1232	#if DEBUG_KERNEL_INIT
1233	printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1234	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1235	#endif
1236
1237	// each core jump to thread_idle_func
1238	thread_idle_func();
1239	}
1240

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