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source: trunk/kernel/kern/kernel_init.c @ 657

Last change on this file since 657 was 657, checked in by alain, 4 years ago
Introduce remote_buf.c/.h & socket.c/.h files. Update dev_nic.c/.h files.
File size: 65.3 KB

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1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017,2018,2019,2020)
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_macros.h>
32	#include <hal_ppm.h>
33	#include <barrier.h>
34	#include <xbarrier.h>
35	#include <remote_fifo.h>
36	#include <core.h>
37	#include <list.h>
38	#include <xlist.h>
39	#include <xhtab.h>
40	#include <thread.h>
41	#include <scheduler.h>
42	#include <kmem.h>
43	#include <cluster.h>
44	#include <string.h>
45	#include <memcpy.h>
46	#include <ppm.h>
47	#include <page.h>
48	#include <chdev.h>
49	#include <boot_info.h>
50	#include <dqdt.h>
51	#include <dev_mmc.h>
52	#include <dev_dma.h>
53	#include <dev_iob.h>
54	#include <dev_ioc.h>
55	#include <dev_txt.h>
56	#include <dev_pic.h>
57	#include <printk.h>
58	#include <vfs.h>
59	#include <devfs.h>
60	#include <mapper.h>
61
62	///////////////////////////////////////////////////////////////////////////////////////////
63	// All the following global variables are replicated in all clusters.
64	// They are initialised by the kernel_init() function.
65	//
66	// WARNING : The section names have been defined to control the base addresses of the
67	// boot_info structure and the idle thread descriptors, through the kernel.ld script:
68	// - the boot_info structure is built by the bootloader, and used by kernel_init.
69	// it must be the first object in the kdata segment.
70	// - the array of idle threads descriptors must be placed on the first page boundary after
71	// the boot_info structure in the kdata segment.
72	///////////////////////////////////////////////////////////////////////////////////////////
73
74	// This variable defines the local boot_info structure
75	__attribute__((section(".kinfo")))
76	boot_info_t boot_info;
77
78	// This variable defines the "idle" threads descriptors array
79	__attribute__((section(".kidle")))
80	char idle_threads[CONFIG_THREAD_DESC_SIZE *
81	CONFIG_MAX_LOCAL_CORES] CONFIG_PPM_PAGE_ALIGNED;
82
83	// This variable defines the local cluster manager
84	__attribute__((section(".kdata")))
85	cluster_t cluster_manager CONFIG_CACHE_LINE_ALIGNED;
86
87	// This variable defines the TXT_TX[0] chdev
88	__attribute__((section(".kdata")))
89	chdev_t txt0_tx_chdev CONFIG_CACHE_LINE_ALIGNED;
90
91	// This variable defines the TXT_RX[0] chdev
92	__attribute__((section(".kdata")))
93	chdev_t txt0_rx_chdev CONFIG_CACHE_LINE_ALIGNED;
94
95	// This variables define the kernel process0 descriptor
96	__attribute__((section(".kdata")))
97	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
98
99	// This variable defines a set of extended pointers on the distributed chdevs
100	__attribute__((section(".kdata")))
101	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
102
103	// This variable contains the input IRQ indexes for the IOPIC controller
104	__attribute__((section(".kdata")))
105	iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
106
107	// This variable contains the input IRQ indexes for the LAPIC controller
108	__attribute__((section(".kdata")))
109	lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
110
111	// This variable defines the local cluster identifier
112	__attribute__((section(".kdata")))
113	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
114
115	// This variable is used for core[0] cores synchronisation in kernel_init()
116	__attribute__((section(".kdata")))
117	xbarrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119	// This variable is used for local cores synchronisation in kernel_init()
120	__attribute__((section(".kdata")))
121	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
122
123	// This variable defines the array of supported File System contexts
124	__attribute__((section(".kdata")))
125	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
126
127	// This array is used for debug, and describes the kernel locks usage,
128	// It must be kept consistent with the defines in kernel_config.h file.
129	__attribute__((section(".kdata")))
130	char * lock_type_str[] =
131	{
132	"unused_0", // 0
133
134	"CLUSTER_KCM", // 1
135	"SCHED_STATE", // 2
136	"VMM_STACK", // 3
137	"VMM_MMAP", // 4
138	"KCM_STATE", // 5
139	"KHM_STATE", // 6
140	"HTAB_STATE", // 7
141
142	"VFS_CTX", // 8
143	"PPM_FREE", // 9
144	"THREAD_JOIN", // 10
145	"XHTAB_STATE", // 11
146	"CHDEV_QUEUE", // 12
147	"CHDEV_TXT0", // 13
148	"CHDEV_TXTLIST", // 14
149	"PAGE_STATE", // 15
150	"MUTEX_STATE", // 16
151	"CONDVAR_STATE", // 17
152	"SEM_STATE", // 18
153	"PROCESS_CWD", // 19
154	"BARRIER_STATE", // 20
155
156	"CLUSTER_PREFTBL", // 21
157
158	"PPM_DIRTY", // 22
159	"CLUSTER_LOCALS", // 23
160	"CLUSTER_COPIES", // 24
161	"PROCESS_CHILDREN", // 25
162	"PROCESS_USERSYNC", // 26
163	"PROCESS_FDARRAY", // 27
164	"PROCESS_DIR", // 28
165	"VMM_VSL", // 29
166
167	"PROCESS_THTBL", // 30
168
169	"MAPPER_STATE", // 31
170	"VFS_SIZE", // 32
171	"VFS_FILE", // 33
172	"VFS_MAIN", // 34
173	"FATFS_FAT", // 35
174	"FBF_WINDOWS", // 36
175	};
176
177	// debug variables to analyse the sys_read() and sys_write() syscalls timing
178
179	#if DEBUG_SYS_READ
180	uint32_t enter_sys_read;
181	uint32_t exit_sys_read;
182
183	uint32_t enter_devfs_read;
184	uint32_t exit_devfs_read;
185
186	uint32_t enter_txt_read;
187	uint32_t exit_txt_read;
188
189	uint32_t enter_chdev_cmd_read;
190	uint32_t exit_chdev_cmd_read;
191
192	uint32_t enter_chdev_server_read;
193	uint32_t exit_chdev_server_read;
194
195	uint32_t enter_tty_cmd_read;
196	uint32_t exit_tty_cmd_read;
197
198	uint32_t enter_tty_isr_read;
199	uint32_t exit_tty_isr_read;
200	#endif
201
202	// these debug variables are used to analyse the sys_write() syscall timing
203
204	#if DEBUG_SYS_WRITE
205	uint32_t enter_sys_write;
206	uint32_t exit_sys_write;
207
208	uint32_t enter_devfs_write;
209	uint32_t exit_devfs_write;
210
211	uint32_t enter_txt_write;
212	uint32_t exit_txt_write;
213
214	uint32_t enter_chdev_cmd_write;
215	uint32_t exit_chdev_cmd_write;
216
217	uint32_t enter_chdev_server_write;
218	uint32_t exit_chdev_server_write;
219
220	uint32_t enter_tty_cmd_write;
221	uint32_t exit_tty_cmd_write;
222
223	uint32_t enter_tty_isr_write;
224	uint32_t exit_tty_isr_write;
225	#endif
226
227	// intrumentation variables : cumulated costs per syscall type in cluster
228
229	#if CONFIG_INSTRUMENTATION_SYSCALLS
230	__attribute__((section(".kdata")))
231	uint32_t syscalls_cumul_cost[SYSCALLS_NR];
232
233	__attribute__((section(".kdata")))
234	uint32_t syscalls_occurences[SYSCALLS_NR];
235	#endif
236
237	///////////////////////////////////////////////////////////////////////////////////////////
238	// This function displays the ALMOS_MKH banner.
239	///////////////////////////////////////////////////////////////////////////////////////////
240	static void print_banner( uint32_t nclusters , uint32_t ncores )
241	{
242	printk("\n"
243	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
244	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
245	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
246	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
247	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
248	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
249	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
250	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
251	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
252	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
253	CONFIG_VERSION , nclusters , ncores );
254	}
255
256
257	///////////////////////////////////////////////////////////////////////////////////////////
258	// This function initializes the TXT_TX[0] and TXT_RX[0] chdev descriptors, implementing
259	// the "kernel terminal", shared by all kernel instances for debug messages.
260	// These chdev are implemented as global variables (replicated in all clusters),
261	// because this terminal is used before the kmem allocator initialisation, but only
262	// the chdevs in cluster 0 are registered in the "chdev_dir" directory.
263	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
264	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
265	// Note: The TXT_RX[0] chdev is created, but is not used by ALMOS-MKH (september 2018).
266	///////////////////////////////////////////////////////////////////////////////////////////
267	// @ info : pointer on the local boot-info structure.
268	///////////////////////////////////////////////////////////////////////////////////////////
269	static void __attribute__ ((noinline)) txt0_device_init( boot_info_t * info )
270	{
271	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
272	uint32_t dev_nr; // actual number of devices in this cluster
273	xptr_t base; // remote pointer on segment base
274	uint32_t func; // device functional index
275	uint32_t impl; // device implementation index
276	uint32_t i; // device index in dev_tbl
277	uint32_t x; // X cluster coordinate
278	uint32_t y; // Y cluster coordinate
279
280	// get number of peripherals and base of devices array from boot_info
281	dev_nr = info->ext_dev_nr;
282	dev_tbl = info->ext_dev;
283
284	// loop on external peripherals to find TXT device
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	// initialize TXT_TX[0] chdev
294	txt0_tx_chdev.func = func;
295	txt0_tx_chdev.impl = impl;
296	txt0_tx_chdev.channel = 0;
297	txt0_tx_chdev.base = base;
298	txt0_tx_chdev.is_rx = false;
299	remote_busylock_init( XPTR( local_cxy , &txt0_tx_chdev.wait_lock ),
300	LOCK_CHDEV_TXT0 );
301
302	// initialize TXT_RX[0] chdev
303	txt0_rx_chdev.func = func;
304	txt0_rx_chdev.impl = impl;
305	txt0_rx_chdev.channel = 0;
306	txt0_rx_chdev.base = base;
307	txt0_rx_chdev.is_rx = true;
308	remote_busylock_init( XPTR( local_cxy , &txt0_rx_chdev.wait_lock ),
309	LOCK_CHDEV_TXT0 );
310
311	// make TXT specific initialisations
312	dev_txt_init( &txt0_tx_chdev );
313	dev_txt_init( &txt0_rx_chdev );
314
315	// register TXT_TX[0] & TXT_RX[0] in chdev_dir[x][y]
316	// for all valid clusters
317	for( x = 0 ; x < info->x_size ; x++ )
318	{
319	for( y = 0 ; y < info->y_size ; y++ )
320	{
321	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
322
323	if( cluster_is_active( cxy ) )
324	{
325	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
326	XPTR( local_cxy , &txt0_tx_chdev ) );
327	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_rx[0] ) ,
328	XPTR( local_cxy , &txt0_rx_chdev ) );
329	}
330	}
331	}
332
333	hal_fence();
334	}
335	} // end loop on devices
336	} // end txt0_device_init()
337
338	///////////////////////////////////////////////////////////////////////////////////////////
339	// This function allocates memory and initializes the chdev descriptors for the internal
340	// peripherals contained in the local cluster, other than the LAPIC, as specified by
341	// the boot_info, including the linking with the driver for the specified implementation.
342	// The relevant entries in all copies of the devices directory are initialised.
343	///////////////////////////////////////////////////////////////////////////////////////////
344	// @ info : pointer on the local boot-info structure.
345	///////////////////////////////////////////////////////////////////////////////////////////
346	static void __attribute__ ((noinline)) internal_devices_init( boot_info_t * info )
347	{
348	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
349	uint32_t dev_nr; // actual number of devices in this cluster
350	xptr_t base; // remote pointer on segment base
351	uint32_t func; // device functionnal index
352	uint32_t impl; // device implementation index
353	uint32_t i; // device index in dev_tbl
354	uint32_t x; // X cluster coordinate
355	uint32_t y; // Y cluster coordinate
356	uint32_t channels; // number of channels
357	uint32_t channel; // channel index
358	chdev_t * chdev_ptr; // local pointer on created chdev
359
360	// get number of internal peripherals and base from boot_info
361	dev_nr = info->int_dev_nr;
362	dev_tbl = info->int_dev;
363
364	// loop on internal peripherals
365	for( i = 0 ; i < dev_nr ; i++ )
366	{
367	base = dev_tbl[i].base;
368	channels = dev_tbl[i].channels;
369	func = FUNC_FROM_TYPE( dev_tbl[i].type );
370	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
371
372	//////////////////////////
373	if( func == DEV_FUNC_MMC )
374	{
375
376	// check channels
377	if( channels != 1 )
378	{
379	printk("\n[PANIC] in %s : MMC device must be single channel\n",
380	__FUNCTION__ );
381	hal_core_sleep();
382	}
383
384	// create chdev in local cluster
385	chdev_ptr = chdev_create( func,
386	impl,
387	0, // channel
388	false, // direction
389	base );
390
391	// check memory
392	if( chdev_ptr == NULL )
393	{
394	printk("\n[PANIC] in %s : cannot create MMC chdev\n",
395	__FUNCTION__ );
396	hal_core_sleep();
397	}
398
399	// make MMC specific initialisation
400	dev_mmc_init( chdev_ptr );
401
402	// set the MMC field in all chdev_dir[x][y] structures
403	for( x = 0 ; x < info->x_size ; x++ )
404	{
405	for( y = 0 ; y < info->y_size ; y++ )
406	{
407	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
408
409	if( cluster_is_active( cxy ) )
410	{
411	hal_remote_s64( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
412	XPTR( local_cxy , chdev_ptr ) );
413	}
414	}
415	}
416
417	#if( DEBUG_KERNEL_INIT & 0x1 )
418	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
419	printk("\n[%s] : created MMC in cluster %x / chdev = %x\n",
420	__FUNCTION__ , local_cxy , chdev_ptr );
421	#endif
422	}
423	///////////////////////////////
424	else if( func == DEV_FUNC_DMA )
425	{
426	// create one chdev per channel in local cluster
427	for( channel = 0 ; channel < channels ; channel++ )
428	{
429	// create chdev[channel] in local cluster
430	chdev_ptr = chdev_create( func,
431	impl,
432	channel,
433	false, // direction
434	base );
435
436	// check memory
437	if( chdev_ptr == NULL )
438	{
439	printk("\n[PANIC] in %s : cannot create DMA chdev\n",
440	__FUNCTION__ );
441	hal_core_sleep();
442	}
443
444	// make DMA specific initialisation
445	dev_dma_init( chdev_ptr );
446
447	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
448	// structure because the DMA device is not remotely accessible.
449	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
450
451	#if( DEBUG_KERNEL_INIT & 0x1 )
452	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
453	printk("\n[%s] : created DMA[%d] in cluster %x / chdev = %x\n",
454	__FUNCTION__ , channel , local_cxy , chdev_ptr );
455	#endif
456	}
457	}
458	}
459	} // end internal_devices_init()
460
461	///////////////////////////////////////////////////////////////////////////////////////////
462	// This function allocates memory and initializes the chdev descriptors for the
463	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
464	// This includes the dynamic linking with the driver for the specified implementation.
465	// These chdev descriptors are distributed on all clusters, using a modulo on a global
466	// index, identically computed in all clusters.
467	// This function is executed in all clusters by the core[0] core, that computes a global index
468	// for all external chdevs. Each core[0] core creates only the chdevs that must be placed in
469	// the local cluster, because the global index matches the local index.
470	// The relevant entries in all copies of the devices directory are initialised.
471	///////////////////////////////////////////////////////////////////////////////////////////
472	// @ info : pointer on the local boot-info structure.
473	///////////////////////////////////////////////////////////////////////////////////////////
474	static void external_devices_init( boot_info_t * info )
475	{
476	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
477	uint32_t dev_nr; // actual number of external devices
478	xptr_t base; // remote pointer on segment base
479	uint32_t func; // device functionnal index
480	uint32_t impl; // device implementation index
481	uint32_t i; // device index in dev_tbl
482	uint32_t x; // X cluster coordinate
483	uint32_t y; // Y cluster coordinate
484	uint32_t channels; // number of channels
485	uint32_t channel; // channel index
486	uint32_t directions; // number of directions (1 or 2)
487	uint32_t rx; // direction index (0 or 1)
488	chdev_t * chdev; // local pointer on one channel_device descriptor
489	uint32_t ext_chdev_gid; // global index of external chdev
490
491	// get number of peripherals and base of devices array from boot_info
492	dev_nr = info->ext_dev_nr;
493	dev_tbl = info->ext_dev;
494
495	// initializes global index (PIC is already placed in cluster 0
496	ext_chdev_gid = 1;
497
498	// loop on external peripherals
499	for( i = 0 ; i < dev_nr ; i++ )
500	{
501	base = dev_tbl[i].base;
502	channels = dev_tbl[i].channels;
503	func = FUNC_FROM_TYPE( dev_tbl[i].type );
504	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
505
506	// There is one chdev per direction for NIC and for TXT
507	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
508	else directions = 1;
509
510	// do nothing for ROM, that does not require a device descriptor.
511	if( func == DEV_FUNC_ROM ) continue;
512
513	// do nothing for PIC, that is already initialized
514	if( func == DEV_FUNC_PIC ) continue;
515
516	// check PIC device initialized
517	if( chdev_dir.pic == XPTR_NULL )
518	{
519	printk("\n[PANIC] in %s : PIC device must be initialized first\n",
520	__FUNCTION__ );
521	hal_core_sleep();
522	}
523
524	// check external device functionnal type
525	if( (func != DEV_FUNC_IOB) && (func != DEV_FUNC_IOC) && (func != DEV_FUNC_TXT) &&
526	(func != DEV_FUNC_NIC) && (func != DEV_FUNC_FBF) )
527	{
528	printk("\n[PANIC] in %s : undefined peripheral type\n",
529	__FUNCTION__ );
530	hal_core_sleep();
531	}
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 TXT0 that has already been initialized
540	if( (func == DEV_FUNC_TXT) && (channel == 0) ) continue;
541
542	// all kernel instances compute the target cluster for all chdevs,
543	// computing the global index ext_chdev_gid[func,channel,direction]
544	cxy_t target_cxy;
545	while( 1 )
546	{
547	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
548	uint32_t x = offset / info->y_size;
549	uint32_t y = offset % info->y_size;
550
551	target_cxy = HAL_CXY_FROM_XY( x , y );
552
553	// exit loop if target cluster is active
554	if( cluster_is_active( target_cxy ) ) break;
555
556	// increment global index otherwise
557	ext_chdev_gid++;
558	}
559
560	// allocate and initialize a local chdev
561	// when local cluster matches target cluster
562	if( target_cxy == local_cxy )
563	{
564
565	#if( DEBUG_KERNEL_INIT & 0x3 )
566	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
567	printk("\n[%s] : found chdev %s / channel = %d / rx = %d / cluster %x\n",
568	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy );
569	#endif
570	chdev = chdev_create( func,
571	impl,
572	channel,
573	rx, // direction
574	base );
575
576	if( chdev == NULL )
577	{
578	printk("\n[PANIC] in %s : cannot allocate chdev\n",
579	__FUNCTION__ );
580	hal_core_sleep();
581	}
582
583	// make device type specific initialisation
584	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
585	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
586	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
587	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
588	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
589
590	// all external (shared) devices are remotely accessible
591	// initialize the replicated chdev_dir[x][y] structures
592	// defining the extended pointers on chdev descriptors
593	xptr_t * entry = NULL;
594
595	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
596	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
597	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
598	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
599	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
600	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
601	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
602
603	for( x = 0 ; x < info->x_size ; x++ )
604	{
605	for( y = 0 ; y < info->y_size ; y++ )
606	{
607	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
608
609	if( cluster_is_active( cxy ) && ( entry != NULL ) )
610	{
611	hal_remote_s64( XPTR( cxy , entry ),
612	XPTR( local_cxy , chdev ) );
613	}
614	}
615	}
616
617	#if( DEBUG_KERNEL_INIT & 0x3 )
618	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
619	printk("\n[%s] : created chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
620	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
621	#endif
622	} // end if match
623
624	// increment chdev global index (matching or not)
625	ext_chdev_gid++;
626
627	} // end loop on directions
628	} // end loop on channels
629	} // end loop on devices
630	} // end external_devices_init()
631
632	///////////////////////////////////////////////////////////////////////////////////////////
633	// This function is called by core[0] in cluster 0 to allocate memory and initialize the PIC
634	// device, namely the informations attached to the external IOPIC controller, that
635	// must be replicated in all clusters (struct iopic_input).
636	// This initialisation must be done before other devices initialisation because the IRQ
637	// routing infrastructure is required for both internal and external devices init.
638	///////////////////////////////////////////////////////////////////////////////////////////
639	// @ info : pointer on the local boot-info structure.
640	///////////////////////////////////////////////////////////////////////////////////////////
641	static void __attribute__ ((noinline)) iopic_init( boot_info_t * info )
642	{
643	boot_device_t * dev_tbl; // pointer on boot_info external devices array
644	uint32_t dev_nr; // actual number of external devices
645	xptr_t base; // remote pointer on segment base
646	uint32_t func; // device functionnal index
647	uint32_t impl; // device implementation index
648	uint32_t i; // device index in dev_tbl
649	uint32_t x; // cluster X coordinate
650	uint32_t y; // cluster Y coordinate
651	bool_t found; // IOPIC found
652	chdev_t * chdev; // pointer on PIC chdev descriptor
653
654	// get number of external peripherals and base of array from boot_info
655	dev_nr = info->ext_dev_nr;
656	dev_tbl = info->ext_dev;
657
658	// avoid GCC warning
659	base = XPTR_NULL;
660	impl = 0;
661
662	// loop on external peripherals to get the IOPIC
663	for( i = 0 , found = false ; i < dev_nr ; i++ )
664	{
665	func = FUNC_FROM_TYPE( dev_tbl[i].type );
666
667	if( func == DEV_FUNC_PIC )
668	{
669	base = dev_tbl[i].base;
670	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
671	found = true;
672	break;
673	}
674	}
675
676	// check PIC existence
677	if( found == false )
678	{
679	printk("\n[PANIC] in %s : PIC device not found\n",
680	__FUNCTION__ );
681	hal_core_sleep();
682	}
683
684	// allocate and initialize the PIC chdev in cluster 0
685	chdev = chdev_create( DEV_FUNC_PIC,
686	impl,
687	0, // channel
688	0, // direction,
689	base );
690
691	// check memory
692	if( chdev == NULL )
693	{
694	printk("\n[PANIC] in %s : no memory for PIC chdev\n",
695	__FUNCTION__ );
696	hal_core_sleep();
697	}
698
699	// make PIC device type specific initialisation
700	dev_pic_init( chdev );
701
702	// register, in all clusters, the extended pointer
703	// on PIC chdev in "chdev_dir" array
704	xptr_t * entry = &chdev_dir.pic;
705
706	for( x = 0 ; x < info->x_size ; x++ )
707	{
708	for( y = 0 ; y < info->y_size ; y++ )
709	{
710	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
711
712	if( cluster_is_active( cxy ) )
713	{
714	hal_remote_s64( XPTR( cxy , entry ) ,
715	XPTR( local_cxy , chdev ) );
716	}
717	}
718	}
719
720	// initialize, in all clusters, the "iopic_input" structure
721	// defining how external IRQs are connected to IOPIC
722
723	// register default value for unused inputs
724	for( x = 0 ; x < info->x_size ; x++ )
725	{
726	for( y = 0 ; y < info->y_size ; y++ )
727	{
728	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
729
730	if( cluster_is_active( cxy ) )
731	{
732	hal_remote_memset( XPTR( cxy , &iopic_input ),
733	0xFF , sizeof(iopic_input_t) );
734	}
735	}
736	}
737
738	// register input IRQ index for valid inputs
739	uint32_t id; // input IRQ index
740	uint8_t valid; // input IRQ is connected
741	uint32_t type; // source device type
742	uint8_t channel; // source device channel
743	uint8_t is_rx; // source device direction
744	uint32_t * ptr = NULL; // local pointer on one field in iopic_input stucture
745
746	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
747	{
748	valid = dev_tbl[i].irq[id].valid;
749	type = dev_tbl[i].irq[id].dev_type;
750	channel = dev_tbl[i].irq[id].channel;
751	is_rx = dev_tbl[i].irq[id].is_rx;
752	func = FUNC_FROM_TYPE( type );
753
754	// get pointer on relevant field in iopic_input
755	if( valid )
756	{
757	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
758	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
759	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
760	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
761	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
762	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
763	else
764	{
765	printk("\n[PANIC] in %s : illegal source device for IOPIC input\n",
766	__FUNCTION__ );
767	hal_core_sleep();
768	}
769
770	// set one entry in all "iopic_input" structures
771	for( x = 0 ; x < info->x_size ; x++ )
772	{
773	for( y = 0 ; y < info->y_size ; y++ )
774	{
775	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
776
777	if( cluster_is_active( cxy ) )
778	{
779	hal_remote_s64( XPTR( cxy , ptr ) , id );
780	}
781	}
782	}
783	}
784	}
785
786	#if( DEBUG_KERNEL_INIT & 0x1 )
787	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
788	{
789	printk("\n[%s] created PIC chdev in cluster %x at cycle %d\n",
790	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
791	dev_pic_inputs_display();
792	}
793	#endif
794
795	} // end iopic_init()
796
797	///////////////////////////////////////////////////////////////////////////////////////////
798	// This function is called by all core[0]s in all cluster to complete the PIC device
799	// initialisation, namely the informations attached to the LAPIC controller.
800	// This initialisation must be done after the IOPIC initialisation, but before other
801	// devices initialisation because the IRQ routing infrastructure is required for both
802	// internal and external devices initialisation.
803	///////////////////////////////////////////////////////////////////////////////////////////
804	// @ info : pointer on the local boot-info structure.
805	///////////////////////////////////////////////////////////////////////////////////////////
806	static void __attribute__ ((noinline)) lapic_init( boot_info_t * info )
807	{
808	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
809	uint32_t dev_nr; // number of internal devices
810	uint32_t i; // device index in dev_tbl
811	xptr_t base; // remote pointer on segment base
812	uint32_t func; // device functionnal type in boot_info
813	bool_t found; // LAPIC found
814
815	// get number of internal peripherals and base
816	dev_nr = info->int_dev_nr;
817	dev_tbl = info->int_dev;
818
819	// loop on internal peripherals to get the lapic device
820	for( i = 0 , found = false ; i < dev_nr ; i++ )
821	{
822	func = FUNC_FROM_TYPE( dev_tbl[i].type );
823
824	if( func == DEV_FUNC_ICU )
825	{
826	base = dev_tbl[i].base;
827	found = true;
828	break;
829	}
830	}
831
832	// if the LAPIC controller is not defined in the boot_info,
833	// we simply don't initialize the PIC extensions in the kernel,
834	// making the assumption that the LAPIC related informations
835	// are hidden in the hardware specific PIC driver.
836	if( found )
837	{
838	// initialise the PIC extensions for
839	// the core descriptor and core manager extensions
840	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
841
842	// initialize the "lapic_input" structure
843	// defining how internal IRQs are connected to LAPIC
844	uint32_t id;
845	uint8_t valid;
846	uint8_t channel;
847	uint32_t func;
848
849	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
850	{
851	valid = dev_tbl[i].irq[id].valid;
852	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
853	channel = dev_tbl[i].irq[id].channel;
854
855	if( valid ) // only valid local IRQs are registered
856	{
857	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
858	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
859	else
860	{
861	printk("\n[PANIC] in %s : illegal source device for LAPIC input\n",
862	__FUNCTION__ );
863	hal_core_sleep();
864	}
865	}
866	}
867	}
868	} // end lapic_init()
869
870	///////////////////////////////////////////////////////////////////////////////////////////
871	// This static function returns the identifiers of the calling core.
872	///////////////////////////////////////////////////////////////////////////////////////////
873	// @ info : pointer on boot_info structure.
874	// @ lid : [out] core local index in cluster.
875	// @ cxy : [out] cluster identifier.
876	// @ lid : [out] core global identifier (hardware).
877	// @ return 0 if success / return -1 if not found.
878	///////////////////////////////////////////////////////////////////////////////////////////
879	static error_t __attribute__ ((noinline)) get_core_identifiers( boot_info_t * info,
880	lid_t * lid,
881	cxy_t * cxy,
882	gid_t * gid )
883	{
884	uint32_t i;
885	gid_t global_id;
886
887	// get global identifier from hardware register
888	global_id = hal_get_gid();
889
890	// makes an associative search in boot_info to get (cxy,lid) from global_id
891	for( i = 0 ; i < info->cores_nr ; i++ )
892	{
893	if( global_id == info->core[i].gid )
894	{
895	*lid = info->core[i].lid;
896	*cxy = info->core[i].cxy;
897	*gid = global_id;
898	return 0;
899	}
900	}
901	return -1;
902	}
903
904
905
906
907
908	///////////////////////////////////////////////////////////////////////////////////////////
909	// This function is the entry point for the kernel initialisation.
910	// It is executed by all cores in all clusters, but only core[cxy][0] initializes
911	// the shared resources such as the cluster manager, or the local peripherals.
912	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
913	// only information contained in the local boot_info_t structure, set by the bootloader.
914	// Only core[0] in cluster 0 print the log messages.
915	///////////////////////////////////////////////////////////////////////////////////////////
916	// @ info : pointer on the local boot-info structure.
917	///////////////////////////////////////////////////////////////////////////////////////////
918	void kernel_init( boot_info_t * info )
919	{
920	lid_t core_lid = -1; // running core local index
921	cxy_t core_cxy = -1; // running core cluster identifier
922	gid_t core_gid; // running core hardware identifier
923	cluster_t * cluster; // pointer on local cluster manager
924	core_t * core; // pointer on running core descriptor
925	thread_t * thread; // pointer on idle thread descriptor
926
927	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
928	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
929	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
930
931	error_t error;
932	reg_t status; // running core status register
933
934	/////////////////////////////////////////////////////////////////////////////////
935	// STEP 1 : Each core get its core identifier from boot_info, and makes
936	// a partial initialisation of its private idle thread descriptor.
937	// core[0] initializes the "local_cxy" global variable.
938	// core[0] in cluster[0] initializes the TXT0 chdev for log messages.
939	/////////////////////////////////////////////////////////////////////////////////
940
941	error = get_core_identifiers( info,
942	&core_lid,
943	&core_cxy,
944	&core_gid );
945
946	// core[0] initialize cluster identifier
947	if( core_lid == 0 ) local_cxy = info->cxy;
948
949	// each core gets a pointer on its private idle thread descriptor
950	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
951
952	// each core registers this thread pointer in hardware register
953	hal_set_current_thread( thread );
954
955	// each core register core descriptor pointer in idle thread descriptor
956	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
957
958	// each core initializes the idle thread locks counters
959	thread->busylocks = 0;
960
961	#if DEBUG_BUSYLOCK
962	// each core initialise the idle thread list of busylocks
963	xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
964	#endif
965
966	// core[0] initializes cluster info
967	if( core_lid == 0 ) cluster_info_init( info );
968
969	// core[0] in cluster[0] initialises TXT0 chdev descriptor
970	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
971
972	// all cores check identifiers
973	if( error )
974	{
975	printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
976	__FUNCTION__, core_lid, core_cxy, core_lid );
977	hal_core_sleep();
978	}
979
980	/////////////////////////////////////////////////////////////////////////////////
981	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
982	(info->x_size * info->y_size) );
983	barrier_wait( &local_barrier , info->cores_nr );
984	/////////////////////////////////////////////////////////////////////////////////
985
986	#if DEBUG_KERNEL_INIT
987	if( (core_lid == 0) & (local_cxy == 0) )
988	printk("\n[%s] exit barrier 1 : TXT0 initialized / cycle %d\n",
989	__FUNCTION__, (uint32_t)hal_get_cycles() );
990	#endif
991
992	/////////////////////////////////////////////////////////////////////////////////
993	// STEP 2 : core[0] initializes the cluster manager,
994	// including the physical memory allocators.
995	/////////////////////////////////////////////////////////////////////////////////
996
997	// core[0] initialises DQDT (only core[0][0] build the quad-tree)
998	if( core_lid == 0 ) dqdt_init();
999
1000	// core[0] initialize other cluster manager complex structures
1001	if( core_lid == 0 )
1002	{
1003	error = cluster_manager_init( info );
1004
1005	if( error )
1006	{
1007	printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1008	__FUNCTION__, local_cxy );
1009	hal_core_sleep();
1010	}
1011	}
1012
1013	/////////////////////////////////////////////////////////////////////////////////
1014	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1015	(info->x_size * info->y_size) );
1016	barrier_wait( &local_barrier , info->cores_nr );
1017	/////////////////////////////////////////////////////////////////////////////////
1018
1019	#if DEBUG_KERNEL_INIT
1020	if( (core_lid == 0) & (local_cxy == 0) )
1021	printk("\n[%s] exit barrier 2 : cluster manager initialized / cycle %d\n",
1022	__FUNCTION__, (uint32_t)hal_get_cycles() );
1023	#endif
1024
1025	/////////////////////////////////////////////////////////////////////////////////
1026	// STEP 3 : all cores initialize the idle thread descriptor.
1027	// core[0] initializes the process_zero descriptor,
1028	// including the kernel VMM (both GPT and VSL)
1029	/////////////////////////////////////////////////////////////////////////////////
1030
1031	// all cores get pointer on local cluster manager & core descriptor
1032	cluster = &cluster_manager;
1033	core = &cluster->core_tbl[core_lid];
1034
1035	// all cores update the register(s) defining the kernel
1036	// entry points for interrupts, exceptions and syscalls,
1037	// this must be done before VFS initialisation, because
1038	// kernel_init() uses RPCs requiring IPIs...
1039	hal_set_kentry();
1040
1041	// all cores initialize the idle thread descriptor
1042	thread_idle_init( thread,
1043	THREAD_IDLE,
1044	&thread_idle_func,
1045	NULL,
1046	core_lid );
1047
1048	// core[0] initializes the process_zero descriptor,
1049	if( core_lid == 0 ) process_zero_create( &process_zero , info );
1050
1051	/////////////////////////////////////////////////////////////////////////////////
1052	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1053	(info->x_size * info->y_size) );
1054	barrier_wait( &local_barrier , info->cores_nr );
1055	/////////////////////////////////////////////////////////////////////////////////
1056
1057	#if DEBUG_KERNEL_INIT
1058	if( (core_lid == 0) & (local_cxy == 0) )
1059	printk("\n[%s] exit barrier 3 : kernel processs initialized / cycle %d\n",
1060	__FUNCTION__, (uint32_t)hal_get_cycles() );
1061	#endif
1062
1063	/////////////////////////////////////////////////////////////////////////////////
1064	// STEP 4 : all cores initialize their private MMU
1065	// core[0] in cluster 0 initializes the IOPIC device.
1066	/////////////////////////////////////////////////////////////////////////////////
1067
1068	// all cores initialise their MMU
1069	hal_mmu_init( &process_zero.vmm.gpt );
1070
1071	// core[0] in cluster[0] initializes the PIC chdev,
1072	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1073
1074	////////////////////////////////////////////////////////////////////////////////
1075	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1076	(info->x_size * info->y_size) );
1077	barrier_wait( &local_barrier , info->cores_nr );
1078	////////////////////////////////////////////////////////////////////////////////
1079
1080	#if DEBUG_KERNEL_INIT
1081	if( (core_lid == 0) & (local_cxy == 0) )
1082	printk("\n[%s] exit barrier 4 : MMU and IOPIC initialized / cycle %d\n",
1083	__FUNCTION__, (uint32_t)hal_get_cycles() );
1084	#endif
1085
1086	////////////////////////////////////////////////////////////////////////////////
1087	// STEP 5 : core[0] initialize the distibuted LAPIC descriptor.
1088	// core[0] initialize the internal chdev descriptors
1089	// core[0] initialize the local external chdev descriptors
1090	////////////////////////////////////////////////////////////////////////////////
1091
1092	// all core[0]s initialize their local LAPIC extension,
1093	if( core_lid == 0 ) lapic_init( info );
1094
1095	// core[0] scan the internal (private) peripherals,
1096	// and allocates memory for the corresponding chdev descriptors.
1097	if( core_lid == 0 ) internal_devices_init( info );
1098
1099
1100	// All core[0]s contribute to initialise external peripheral chdev descriptors.
1101	// Each core[0][cxy] scan the set of external (shared) peripherals (but the TXT0),
1102	// and allocates memory for the chdev descriptors that must be placed
1103	// on the (cxy) cluster according to the global index value.
1104
1105	if( core_lid == 0 ) external_devices_init( info );
1106
1107	/////////////////////////////////////////////////////////////////////////////////
1108	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1109	(info->x_size * info->y_size) );
1110	barrier_wait( &local_barrier , info->cores_nr );
1111	/////////////////////////////////////////////////////////////////////////////////
1112
1113	#if DEBUG_KERNEL_INIT
1114	if( (core_lid == 0) & (local_cxy == 0) )
1115	printk("\n[%s] exit barrier 5 : chdevs initialised / cycle %d\n",
1116	__FUNCTION__, (uint32_t)hal_get_cycles() );
1117	#endif
1118
1119	#if CONFIG_INSTRUMENTATION_CHDEVS
1120	if( (core_lid == 0) & (local_cxy == 0) )
1121	chdev_dir_display();
1122	#endif
1123
1124	/////////////////////////////////////////////////////////////////////////////////
1125	// STEP 6 : All cores enable IPI (Inter Procesor Interrupt),
1126	// All cores unblock the idle thread, and register it in scheduler.
1127	// The core[0] in cluster defined by the CONFIG_VFS_ROOT_CXY parameter,
1128	// access the IOC device to initialize the VFS for the FS identified
1129	// by the CONFIG_VFS_ROOT_IS_*** parameter. It does the following
1130	// actions in the VFS_ROOT cluster :
1131	// 1. allocate and initialize the selected FS context,
1132	// 2. create and initializes the VFS root inodes,
1133	// 3. initialize the VFS context for FATFS (in fs_context[] array),
1134	// 4. create the <.> and <..> dentries in VFS root directory,
1135	// 5. register the VFS root inode in process_zero descriptor,
1136	// 6. allocate the DEVFS context,
1137	// 7. initialize the VFS context for DEVFS (in fs_context[] array),
1138	// 8. create the <dev> and <external> inodes,
1139	// 9. initialize the DEVFS context.
1140	/////////////////////////////////////////////////////////////////////////////////
1141
1142	// All cores enable IPI
1143	dev_pic_enable_ipi();
1144	hal_enable_irq( &status );
1145
1146	// all cores unblock the idle thread, and register it in scheduler
1147	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1148	core->scheduler.idle = thread;
1149
1150	// core[O] in VFS_ROOT cluster creates the VFS root
1151	if( (core_lid == 0) && (local_cxy == CONFIG_VFS_ROOT_CXY ) )
1152	{
1153	// Only FATFS is supported yet,
1154	// TODO other File System can be introduced below
1155	if( CONFIG_VFS_ROOT_IS_FATFS )
1156	{
1157	// 1. allocate memory and initialize FATFS context in VFS_ROOT cluster
1158	xptr_t fatfs_ctx_xp = fatfs_ctx_alloc( CONFIG_VFS_ROOT_CXY );
1159
1160	if( fatfs_ctx_xp == XPTR_NULL )
1161	{
1162	printk("\n[PANIC] in %s : cannot allocate FATFS context in cluster %x\n",
1163	__FUNCTION__ , CONFIG_VFS_ROOT_CXY );
1164	hal_core_sleep();
1165	}
1166
1167	// initialise FATFS context in VFS_ROOT cluster from IOC device (boot_record)
1168	error = fatfs_ctx_init( fatfs_ctx_xp );
1169
1170	if( error )
1171	{
1172	printk("\n[PANIC] in %s : cannot initialize FATFS context in cluster %x\n",
1173	__FUNCTION__ , CONFIG_VFS_ROOT_CXY );
1174	hal_core_sleep();
1175	}
1176
1177	#if( DEBUG_KERNEL_INIT & 1 )
1178	printk("\n[%s] initialized FATFS context in cluster %x\n",
1179	__FUNCTION__, CONFIG_VFS_ROOT_CXY );
1180	#endif
1181
1182	// get various informations from FATFS context
1183	fatfs_ctx_t * fatfs_ctx_ptr = GET_PTR( fatfs_ctx_xp );
1184
1185	uint32_t root_dir_cluster = hal_remote_l32( XPTR( CONFIG_VFS_ROOT_CXY,
1186	&fatfs_ctx_ptr->root_dir_cluster ) );
1187
1188	uint32_t bytes_per_sector = hal_remote_l32( XPTR( CONFIG_VFS_ROOT_CXY,
1189	&fatfs_ctx_ptr->bytes_per_sector ) );
1190
1191	uint32_t sectors_per_cluster = hal_remote_l32( XPTR( CONFIG_VFS_ROOT_CXY,
1192	&fatfs_ctx_ptr->sectors_per_cluster ) );
1193
1194	uint32_t cluster_size = bytes_per_sector * sectors_per_cluster;
1195
1196	uint32_t fat_sectors_count = hal_remote_l32( XPTR( CONFIG_VFS_ROOT_CXY,
1197	&fatfs_ctx_ptr->fat_sectors_count ) ) << 7;
1198
1199	uint32_t total_clusters = fat_sectors_count << 7;
1200
1201	// 2. create VFS root inode in VFS_ROOT cluster
1202	// TODO define attr, rights, uid, gid
1203	error = vfs_inode_create( CONFIG_VFS_ROOT_CXY, // target cluster
1204	FS_TYPE_FATFS, // fs_type
1205	0, // attr
1206	0, // rights
1207	0, // uid
1208	0, // gid
1209	&vfs_root_inode_xp ); // return
1210	if( error )
1211	{
1212	printk("\n[PANIC] in %s : cannot create VFS root inode in cluster %x\n",
1213	__FUNCTION__ , CONFIG_VFS_ROOT_CXY );
1214	hal_core_sleep();
1215	}
1216
1217	#if( DEBUG_KERNEL_INIT & 1 )
1218	vfs_inode_t * root_inode = GET_PTR( vfs_root_inode_xp );
1219	printk("\n[%s] created </> root inode %x in cluster %x / ctx %x\n",
1220	__FUNCTION__, root_inode, CONFIG_VFS_ROOT_CXY, root_inode->ctx );
1221	#endif
1222
1223	// update FATFS root inode "type" and "extend" fields
1224	vfs_inode_t * vfs_root_inode_ptr = GET_PTR( vfs_root_inode_xp );
1225
1226	hal_remote_s32( XPTR( CONFIG_VFS_ROOT_CXY , &vfs_root_inode_ptr->type ),
1227	INODE_TYPE_DIR );
1228
1229	hal_remote_spt( XPTR( CONFIG_VFS_ROOT_CXY , &vfs_root_inode_ptr->extend ),
1230	(void*)(intptr_t)root_dir_cluster );
1231
1232	// 3. initialize the VFS context for FATFS in VFS_ROOT cluster
1233	vfs_ctx_init( CONFIG_VFS_ROOT_CXY, // target cluster
1234	FS_TYPE_FATFS, // fs type
1235	total_clusters, // number of clusters
1236	cluster_size, // bytes
1237	vfs_root_inode_xp, // VFS root
1238	fatfs_ctx_ptr ); // extend
1239
1240	#if( DEBUG_KERNEL_INIT & 1 )
1241	vfs_ctx_t * vfs_for_fatfs_ctx = &fs_context[FS_TYPE_FATFS];
1242	printk("\n[%s] initialized VFS_for_FATFS context in cluster %x / ctx %x / fs_type %d\n",
1243	__FUNCTION__, CONFIG_VFS_ROOT_CXY, vfs_for_fatfs_ctx, vfs_for_fatfs_ctx->type );
1244	#endif
1245	}
1246	else
1247	{
1248	printk("\n[PANIC] in %s : unsupported VFS type in cluster %x\n",
1249	__FUNCTION__ , CONFIG_VFS_ROOT_CXY );
1250	hal_core_sleep();
1251	}
1252
1253	// 4. create the <.> and <..> dentries in VFS root directory
1254	// the VFS root parent inode is the VFS root inode itself
1255	vfs_add_special_dentries( vfs_root_inode_xp,
1256	vfs_root_inode_xp );
1257
1258	// 5. register VFS root inode in target cluster process_zero descriptor
1259	hal_remote_s64( XPTR( CONFIG_VFS_ROOT_CXY , &process_zero.vfs_root_xp ),
1260	vfs_root_inode_xp );
1261	hal_remote_s64( XPTR( CONFIG_VFS_ROOT_CXY , &process_zero.cwd_xp ),
1262	vfs_root_inode_xp );
1263
1264	// 6. allocate memory for DEVFS context in VFS_ROOT cluster
1265	xptr_t devfs_ctx_xp = devfs_ctx_alloc( CONFIG_VFS_ROOT_CXY );
1266
1267	if( devfs_ctx_xp == XPTR_NULL )
1268	{
1269	printk("\n[PANIC] in %s : cannot create DEVFS context in cluster %x\n",
1270	__FUNCTION__ , CONFIG_VFS_ROOT_CXY );
1271	hal_core_sleep();
1272	}
1273
1274	// 7. initialize the VFS context for DEVFS in VFS_ROOT cluster
1275	vfs_ctx_init( CONFIG_VFS_ROOT_CXY, // target cluster
1276	FS_TYPE_DEVFS, // fs type
1277	0, // total_clusters: unused
1278	0, // cluster_size: unused
1279	vfs_root_inode_xp, // VFS root
1280	GET_PTR( devfs_ctx_xp ) ); // extend
1281
1282	#if( DEBUG_KERNEL_INIT & 1 )
1283	vfs_ctx_t * vfs_for_devfs_ctx = &fs_context[FS_TYPE_DEVFS];
1284	printk("\n[%s] initialized VFS_for_DEVFS context in cluster %x / ctx %x / fs_type %d\n",
1285	__FUNCTION__, CONFIG_VFS_ROOT_CXY, vfs_for_devfs_ctx, vfs_for_devfs_ctx->type );
1286	#endif
1287
1288	// 8. create "dev" and "external" inodes (directories)
1289	devfs_global_init( vfs_root_inode_xp,
1290	&devfs_dev_inode_xp,
1291	&devfs_external_inode_xp );
1292
1293	// 9. initializes DEVFS context in VFS_ROOT cluster
1294	devfs_ctx_init( devfs_ctx_xp,
1295	devfs_dev_inode_xp,
1296	devfs_external_inode_xp );
1297	}
1298
1299	/////////////////////////////////////////////////////////////////////////////////
1300	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1301	(info->x_size * info->y_size) );
1302	barrier_wait( &local_barrier , info->cores_nr );
1303	/////////////////////////////////////////////////////////////////////////////////
1304
1305	#if DEBUG_KERNEL_INIT
1306	if( (core_lid == 0) & (local_cxy == CONFIG_VFS_ROOT_CXY) )
1307	printk("\n[%s] exit barrier 6 : VFS root inode (%x) created in cluster (%x) / cycle %d\n",
1308	__FUNCTION__, GET_CXY(vfs_root_inode_xp),
1309	GET_PTR(vfs_root_inode_xp), (uint32_t)hal_get_cycles() );
1310	#endif
1311
1312	/////////////////////////////////////////////////////////////////////////////////
1313	// STEP 7 : In all clusters other than the VFS_ROOT cluster, the core[0] makes
1314	// the following local actions to complete the VFS initialisation :
1315	// 1. allocate a local context for the selected FS extension,
1316	// 2. copy FS context from VFS_ROOT cluster to local cluster,
1317	// 3. copy VFS_for_FATFS context from VFS_ROOT cluster to local cluster,
1318	// 4. allocate a local context for the DEVFS extension,
1319	// 5. copy DEVFS context from VFS_ROOT cluster to local cluster,
1320	// 6. update the local "root_inode_xp" field in process_zero.
1321	/////////////////////////////////////////////////////////////////////////////////
1322
1323	if( (core_lid == 0) && (local_cxy != CONFIG_VFS_ROOT_CXY) )
1324	{
1325	// only FATFS is supported yet
1326	// TODO other File System can be introduced below
1327	if( CONFIG_VFS_ROOT_IS_FATFS )
1328	{
1329	// 1. allocate a local FATFS context extension
1330	xptr_t local_fatfs_ctx_xp = fatfs_ctx_alloc( local_cxy );
1331
1332	if( local_fatfs_ctx_xp == XPTR_NULL )
1333	{
1334	printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1335	__FUNCTION__ , local_cxy );
1336	hal_core_sleep();
1337	}
1338
1339	// get local pointer on VFS_for_FATFS context (same in all clusters)
1340	vfs_ctx_t * vfs_fat_ctx_ptr = &fs_context[FS_TYPE_FATFS];
1341
1342	// build extended pointer on VFS_for_FATFS "extend" field in VFS_ROOT cluster
1343	xptr_t fatfs_extend_xp = XPTR( CONFIG_VFS_ROOT_CXY , &vfs_fat_ctx_ptr->extend );
1344
1345	// get local pointer on FATFS context in VFS_ROOT cluster
1346	fatfs_ctx_t * remote_fatfs_ctx_ptr = hal_remote_lpt( fatfs_extend_xp );
1347
1348	// build extended pointer on FATFS context in VFS_ROOT cluster
1349	xptr_t remote_fatfs_ctx_xp = XPTR( CONFIG_VFS_ROOT_CXY , remote_fatfs_ctx_ptr );
1350
1351	// 2. copy FATFS context from VFS_ROOT cluster to local cluster
1352	hal_remote_memcpy( local_fatfs_ctx_xp,
1353	remote_fatfs_ctx_xp,
1354	sizeof(fatfs_ctx_t) );
1355
1356	// build extended pointer on remote VFS_for_FATFS context
1357	xptr_t remote_vfs_ctx_xp = XPTR( CONFIG_VFS_ROOT_CXY , vfs_fat_ctx_ptr );
1358
1359	// build extended pointer on local VFS_for_FATFS context
1360	xptr_t local_vfs_ctx_xp = XPTR( local_cxy , vfs_fat_ctx_ptr );
1361
1362	// 3. copy VFS_for_FATFS context from VFS_ROOT cluster to local cluster
1363	hal_remote_memcpy( local_vfs_ctx_xp,
1364	remote_vfs_ctx_xp,
1365	sizeof(vfs_ctx_t) );
1366
1367	// update "extend" field in local VFS_for_FATFS context
1368	vfs_fat_ctx_ptr->extend = GET_PTR( local_fatfs_ctx_xp );
1369
1370	// check local FATFS and VFS context copies
1371	assert( (((fatfs_ctx_t *)vfs_fat_ctx_ptr->extend)->sectors_per_cluster == 8),
1372	"illegal FATFS context in cluster %x\n", local_cxy );
1373
1374	}
1375	else
1376	{
1377	printk("\n[PANIC] in %s : unsupported VFS type in cluster %x\n",
1378	__FUNCTION__ , local_cxy );
1379	hal_core_sleep();
1380	}
1381
1382	// 4. allocate a local DEVFS context extension,
1383	xptr_t local_devfs_ctx_xp = devfs_ctx_alloc( local_cxy );
1384
1385	// get local pointer on VFS_for_DEVFS context (same in all clusters)
1386	vfs_ctx_t * vfs_dev_ctx_ptr = &fs_context[FS_TYPE_DEVFS];
1387
1388	// build extended pointer on VFS_for_DEVFS extend field in VFS_ROOT cluster
1389	xptr_t remote_extend_xp = XPTR( CONFIG_VFS_ROOT_CXY , &vfs_dev_ctx_ptr->extend );
1390
1391	// get local pointer on DEVFS context in VFS_ROOT cluster
1392	devfs_ctx_t * remote_devfs_ctx_ptr = hal_remote_lpt( remote_extend_xp );
1393
1394	// build extended pointer on FATFS context in VFS_ROOT cluster
1395	xptr_t remote_devfs_ctx_xp = XPTR( CONFIG_VFS_ROOT_CXY , remote_devfs_ctx_ptr );
1396
1397	// 5. copy DEVFS context from VFS_ROOT cluster to local cluster
1398	hal_remote_memcpy( local_devfs_ctx_xp,
1399	remote_devfs_ctx_xp,
1400	sizeof(devfs_ctx_t) );
1401
1402	// update "extend" field in local VFS_for_DEVFS context
1403	vfs_dev_ctx_ptr->extend = GET_PTR( local_devfs_ctx_xp );
1404
1405	// get extended pointer on VFS root inode from VFS_ROOT cluster
1406	vfs_root_inode_xp = hal_remote_l64( XPTR( CONFIG_VFS_ROOT_CXY,
1407	&process_zero.vfs_root_xp ) );
1408
1409	// 6. update local process_zero descriptor
1410	process_zero.vfs_root_xp = vfs_root_inode_xp;
1411	process_zero.cwd_xp = vfs_root_inode_xp;
1412	}
1413
1414	/////////////////////////////////////////////////////////////////////////////////
1415	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1416	(info->x_size * info->y_size) );
1417	barrier_wait( &local_barrier , info->cores_nr );
1418	/////////////////////////////////////////////////////////////////////////////////
1419
1420	#if DEBUG_KERNEL_INIT
1421	if( (core_lid == 0) & (local_cxy == 0) )
1422	printk("\n[%s] exit barrier 7 : VFS & DEVFS contexts replicated in all clusters / cycle %d\n",
1423	__FUNCTION__ , (uint32_t)hal_get_cycles() );
1424	#endif
1425
1426	/////////////////////////////////////////////////////////////////////////////////
1427	// STEP 8 : In all clusters in parallel, core[0] completes DEVFS initialization.
1428	// Each core[0] creates the local DEVFS "internal" directory,
1429	// and creates the pseudo-files for chdevs placed in local cluster.
1430	/////////////////////////////////////////////////////////////////////////////////
1431
1432	if( core_lid == 0 )
1433	{
1434	// get local pointer on local DEVFS context
1435	devfs_ctx_t * ctx = fs_context[FS_TYPE_DEVFS].extend;
1436
1437	// populate DEVFS in all clusters
1438	devfs_local_init( ctx->dev_inode_xp,
1439	ctx->external_inode_xp );
1440	}
1441
1442	/////////////////////////////////////////////////////////////////////////////////
1443	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1444	(info->x_size * info->y_size) );
1445	barrier_wait( &local_barrier , info->cores_nr );
1446	/////////////////////////////////////////////////////////////////////////////////
1447
1448	#if DEBUG_KERNEL_INIT
1449	if( (core_lid == 0) & (local_cxy == 0) )
1450	printk("\n[%s] exit barrier 8 : DEVFS initialized in all clusters / cycle %d\n",
1451	__FUNCTION__, (uint32_t)hal_get_cycles() );
1452	#endif
1453
1454	#if( DEBUG_KERNEL_INIT & 1 )
1455	if( (core_lid == 0) & (local_cxy == 0) )
1456	vfs_display( vfs_root_inode_xp );
1457	#endif
1458
1459	/////////////////////////////////////////////////////////////////////////////////
1460	// STEP 9 : core[0] in cluster 0 creates the first user process (process_init).
1461	// This include the process VMM (GPT and VSL) creation.
1462	// Finally, it prints the ALMOS-MKH banner.
1463	/////////////////////////////////////////////////////////////////////////////////
1464
1465	if( (core_lid == 0) && (local_cxy == 0) )
1466	{
1467	process_init_create();
1468	}
1469
1470	#if DEBUG_KERNEL_INIT
1471	if( (core_lid == 0) & (local_cxy == 0) )
1472	printk("\n[%s] exit barrier 9 : process_init created in cluster 0 / cycle %d\n",
1473	__FUNCTION__, (uint32_t)hal_get_cycles() );
1474	#endif
1475
1476	if( (core_lid == 0) && (local_cxy == 0) )
1477	{
1478	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1479	}
1480
1481	#if CONFIG_INSTRUMENTATION_FOOTPRINT
1482	if( (core_lid == 0) & (local_cxy == 0) )
1483	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1484	" - thread descriptor : %d bytes\n"
1485	" - process descriptor : %d bytes\n"
1486	" - cluster manager : %d bytes\n"
1487	" - chdev descriptor : %d bytes\n"
1488	" - core descriptor : %d bytes\n"
1489	" - scheduler : %d bytes\n"
1490	" - rpc fifo : %d bytes\n"
1491	" - page descriptor : %d bytes\n"
1492	" - mapper descriptor : %d bytes\n"
1493	" - vseg descriptor : %d bytes\n"
1494	" - ppm manager : %d bytes\n"
1495	" - kcm manager : %d bytes\n"
1496	" - khm manager : %d bytes\n"
1497	" - vmm manager : %d bytes\n"
1498	" - vfs inode : %d bytes\n"
1499	" - vfs dentry : %d bytes\n"
1500	" - vfs file : %d bytes\n"
1501	" - vfs context : %d bytes\n"
1502	" - xhtab root : %d bytes\n"
1503	" - list item : %d bytes\n"
1504	" - xlist item : %d bytes\n"
1505	" - busylock : %d bytes\n"
1506	" - remote busylock : %d bytes\n"
1507	" - queuelock : %d bytes\n"
1508	" - remote queuelock : %d bytes\n"
1509	" - rwlock : %d bytes\n"
1510	" - remote rwlock : %d bytes\n",
1511	sizeof( thread_t ),
1512	sizeof( process_t ),
1513	sizeof( cluster_t ),
1514	sizeof( chdev_t ),
1515	sizeof( core_t ),
1516	sizeof( scheduler_t ),
1517	sizeof( remote_fifo_t ),
1518	sizeof( page_t ),
1519	sizeof( mapper_t ),
1520	sizeof( vseg_t ),
1521	sizeof( ppm_t ),
1522	sizeof( kcm_t ),
1523	sizeof( khm_t ),
1524	sizeof( vmm_t ),
1525	sizeof( vfs_inode_t ),
1526	sizeof( vfs_dentry_t ),
1527	sizeof( vfs_file_t ),
1528	sizeof( vfs_ctx_t ),
1529	sizeof( xhtab_t ),
1530	sizeof( list_entry_t ),
1531	sizeof( xlist_entry_t ),
1532	sizeof( busylock_t ),
1533	sizeof( remote_busylock_t ),
1534	sizeof( queuelock_t ),
1535	sizeof( remote_queuelock_t ),
1536	sizeof( rwlock_t ),
1537	sizeof( remote_rwlock_t ));
1538	#endif
1539
1540	// each core activates its private TICK IRQ
1541	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1542
1543	/////////////////////////////////////////////////////////////////////////////////
1544	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1545	(info->x_size * info->y_size) );
1546	barrier_wait( &local_barrier , info->cores_nr );
1547	/////////////////////////////////////////////////////////////////////////////////
1548
1549	#if DEBUG_KERNEL_INIT
1550	thread_t * this = CURRENT_THREAD;
1551	printk("\n[%s] : thread[%x,%x] on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1552	__FUNCTION__ , this->process->pid, this->trdid,
1553	local_cxy, core_lid, (uint32_t)hal_get_cycles() );
1554	#endif
1555
1556	// each core jump to thread_idle_func
1557	thread_idle_func();
1558
1559	} // end kernel_init()
1560

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