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source: trunk/kernel/kern/kernel_init.c @ 635

Last change on this file since 635 was 635, checked in by alain, 5 years ago

This version is a major evolution: The physical memory allocators,
defined in the kmem.c, ppm.c, and kcm.c files have been modified
to support remote accesses. The RPCs that were previously user
to allocate physical memory in a remote cluster have been removed.
This has been done to cure a dead-lock in case of concurrent page-faults.

This version 2.2 has been tested on a (4 clusters / 2 cores per cluster)
TSAR architecture, for both the "sort" and the "fft" applications.

File size: 62.4 KB

Line
1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017,2018,2019)
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	"VFS_CTX", // 5
139	"KCM_STATE", // 6
140	"KHM_STATE", // 7
141	"HTAB_STATE", // 8
142
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	"unused_29", // 29
166
167	"PROCESS_THTBL", // 30
168
169	"MAPPER_STATE", // 31
170	"VFS_SIZE", // 32
171	"VFS_FILE", // 33
172	"VMM_VSL", // 34
173	"VFS_MAIN", // 35
174	"FATFS_FAT", // 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	chdev = chdev_create( func,
565	impl,
566	channel,
567	rx, // direction
568	base );
569
570	if( chdev == NULL )
571	{
572	printk("\n[PANIC] in %s : cannot allocate chdev\n",
573	__FUNCTION__ );
574	hal_core_sleep();
575	}
576
577	// make device type specific initialisation
578	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
579	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
580	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
581	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
582	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
583
584	// all external (shared) devices are remotely accessible
585	// initialize the replicated chdev_dir[x][y] structures
586	// defining the extended pointers on chdev descriptors
587	xptr_t * entry = NULL;
588
589	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
590	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
591	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
592	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
593	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
594	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
595	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
596
597	for( x = 0 ; x < info->x_size ; x++ )
598	{
599	for( y = 0 ; y < info->y_size ; y++ )
600	{
601	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
602
603	if( cluster_is_active( cxy ) && ( entry != NULL ) )
604	{
605	hal_remote_s64( XPTR( cxy , entry ),
606	XPTR( local_cxy , chdev ) );
607	}
608	}
609	}
610
611	#if( DEBUG_KERNEL_INIT & 0x1 )
612	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
613	printk("\n[%s] : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
614	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
615	#endif
616	} // end if match
617
618	// increment chdev global index (matching or not)
619	ext_chdev_gid++;
620
621	} // end loop on directions
622	} // end loop on channels
623	} // end loop on devices
624	} // end external_devices_init()
625
626	///////////////////////////////////////////////////////////////////////////////////////////
627	// This function is called by core[0] in cluster 0 to allocate memory and initialize the PIC
628	// device, namely the informations attached to the external IOPIC controller, that
629	// must be replicated in all clusters (struct iopic_input).
630	// This initialisation must be done before other devices initialisation because the IRQ
631	// routing infrastructure is required for both internal and external devices init.
632	///////////////////////////////////////////////////////////////////////////////////////////
633	// @ info : pointer on the local boot-info structure.
634	///////////////////////////////////////////////////////////////////////////////////////////
635	static void __attribute__ ((noinline)) iopic_init( boot_info_t * info )
636	{
637	boot_device_t * dev_tbl; // pointer on boot_info external devices array
638	uint32_t dev_nr; // actual number of external devices
639	xptr_t base; // remote pointer on segment base
640	uint32_t func; // device functionnal index
641	uint32_t impl; // device implementation index
642	uint32_t i; // device index in dev_tbl
643	uint32_t x; // cluster X coordinate
644	uint32_t y; // cluster Y coordinate
645	bool_t found; // IOPIC found
646	chdev_t * chdev; // pointer on PIC chdev descriptor
647
648	// get number of external peripherals and base of array from boot_info
649	dev_nr = info->ext_dev_nr;
650	dev_tbl = info->ext_dev;
651
652	// avoid GCC warning
653	base = XPTR_NULL;
654	impl = 0;
655
656	// loop on external peripherals to get the IOPIC
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_PIC )
662	{
663	base = dev_tbl[i].base;
664	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
665	found = true;
666	break;
667	}
668	}
669
670	// check PIC existence
671	if( found == false )
672	{
673	printk("\n[PANIC] in %s : PIC device not found\n",
674	__FUNCTION__ );
675	hal_core_sleep();
676	}
677
678	// allocate and initialize the PIC chdev in cluster 0
679	chdev = chdev_create( DEV_FUNC_PIC,
680	impl,
681	0, // channel
682	0, // direction,
683	base );
684
685	// check memory
686	if( chdev == NULL )
687	{
688	printk("\n[PANIC] in %s : no memory for PIC chdev\n",
689	__FUNCTION__ );
690	hal_core_sleep();
691	}
692
693	// make PIC device type specific initialisation
694	dev_pic_init( chdev );
695
696	// register, in all clusters, the extended pointer
697	// on PIC chdev in "chdev_dir" array
698	xptr_t * entry = &chdev_dir.pic;
699
700	for( x = 0 ; x < info->x_size ; x++ )
701	{
702	for( y = 0 ; y < info->y_size ; y++ )
703	{
704	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
705
706	if( cluster_is_active( cxy ) )
707	{
708	hal_remote_s64( XPTR( cxy , entry ) ,
709	XPTR( local_cxy , chdev ) );
710	}
711	}
712	}
713
714	// initialize, in all clusters, the "iopic_input" structure
715	// defining how external IRQs are connected to IOPIC
716
717	// register default value for unused inputs
718	for( x = 0 ; x < info->x_size ; x++ )
719	{
720	for( y = 0 ; y < info->y_size ; y++ )
721	{
722	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
723
724	if( cluster_is_active( cxy ) )
725	{
726	hal_remote_memset( XPTR( cxy , &iopic_input ),
727	0xFF , sizeof(iopic_input_t) );
728	}
729	}
730	}
731
732	// register input IRQ index for valid inputs
733	uint32_t id; // input IRQ index
734	uint8_t valid; // input IRQ is connected
735	uint32_t type; // source device type
736	uint8_t channel; // source device channel
737	uint8_t is_rx; // source device direction
738	uint32_t * ptr = NULL; // local pointer on one field in iopic_input stucture
739
740	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
741	{
742	valid = dev_tbl[i].irq[id].valid;
743	type = dev_tbl[i].irq[id].dev_type;
744	channel = dev_tbl[i].irq[id].channel;
745	is_rx = dev_tbl[i].irq[id].is_rx;
746	func = FUNC_FROM_TYPE( type );
747
748	// get pointer on relevant field in iopic_input
749	if( valid )
750	{
751	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
752	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
753	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
754	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
755	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
756	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
757	else
758	{
759	printk("\n[PANIC] in %s : illegal source device for IOPIC input\n",
760	__FUNCTION__ );
761	hal_core_sleep();
762	}
763
764	// set one entry in all "iopic_input" structures
765	for( x = 0 ; x < info->x_size ; x++ )
766	{
767	for( y = 0 ; y < info->y_size ; y++ )
768	{
769	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
770
771	if( cluster_is_active( cxy ) )
772	{
773	hal_remote_s64( XPTR( cxy , ptr ) , id );
774	}
775	}
776	}
777	}
778	}
779
780	#if( DEBUG_KERNEL_INIT & 0x1 )
781	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
782	{
783	printk("\n[%s] created PIC chdev in cluster %x at cycle %d\n",
784	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
785	dev_pic_inputs_display();
786	}
787	#endif
788
789	} // end iopic_init()
790
791	///////////////////////////////////////////////////////////////////////////////////////////
792	// This function is called by all core[0]s in all cluster to complete the PIC device
793	// initialisation, namely the informations attached to the LAPIC controller.
794	// This initialisation must be done after the IOPIC initialisation, but before other
795	// devices initialisation because the IRQ routing infrastructure is required for both
796	// internal and external devices initialisation.
797	///////////////////////////////////////////////////////////////////////////////////////////
798	// @ info : pointer on the local boot-info structure.
799	///////////////////////////////////////////////////////////////////////////////////////////
800	static void __attribute__ ((noinline)) lapic_init( boot_info_t * info )
801	{
802	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
803	uint32_t dev_nr; // number of internal devices
804	uint32_t i; // device index in dev_tbl
805	xptr_t base; // remote pointer on segment base
806	uint32_t func; // device functionnal type in boot_info
807	bool_t found; // LAPIC found
808
809	// get number of internal peripherals and base
810	dev_nr = info->int_dev_nr;
811	dev_tbl = info->int_dev;
812
813	// loop on internal peripherals to get the lapic device
814	for( i = 0 , found = false ; i < dev_nr ; i++ )
815	{
816	func = FUNC_FROM_TYPE( dev_tbl[i].type );
817
818	if( func == DEV_FUNC_ICU )
819	{
820	base = dev_tbl[i].base;
821	found = true;
822	break;
823	}
824	}
825
826	// if the LAPIC controller is not defined in the boot_info,
827	// we simply don't initialize the PIC extensions in the kernel,
828	// making the assumption that the LAPIC related informations
829	// are hidden in the hardware specific PIC driver.
830	if( found )
831	{
832	// initialise the PIC extensions for
833	// the core descriptor and core manager extensions
834	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
835
836	// initialize the "lapic_input" structure
837	// defining how internal IRQs are connected to LAPIC
838	uint32_t id;
839	uint8_t valid;
840	uint8_t channel;
841	uint32_t func;
842
843	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
844	{
845	valid = dev_tbl[i].irq[id].valid;
846	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
847	channel = dev_tbl[i].irq[id].channel;
848
849	if( valid ) // only valid local IRQs are registered
850	{
851	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
852	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
853	else
854	{
855	printk("\n[PANIC] in %s : illegal source device for LAPIC input\n",
856	__FUNCTION__ );
857	hal_core_sleep();
858	}
859	}
860	}
861	}
862	} // end lapic_init()
863
864	///////////////////////////////////////////////////////////////////////////////////////////
865	// This static function returns the identifiers of the calling core.
866	///////////////////////////////////////////////////////////////////////////////////////////
867	// @ info : pointer on boot_info structure.
868	// @ lid : [out] core local index in cluster.
869	// @ cxy : [out] cluster identifier.
870	// @ lid : [out] core global identifier (hardware).
871	// @ return 0 if success / return EINVAL if not found.
872	///////////////////////////////////////////////////////////////////////////////////////////
873	static error_t __attribute__ ((noinline)) get_core_identifiers( boot_info_t * info,
874	lid_t * lid,
875	cxy_t * cxy,
876	gid_t * gid )
877	{
878	uint32_t i;
879	gid_t global_id;
880
881	// get global identifier from hardware register
882	global_id = hal_get_gid();
883
884	// makes an associative search in boot_info to get (cxy,lid) from global_id
885	for( i = 0 ; i < info->cores_nr ; i++ )
886	{
887	if( global_id == info->core[i].gid )
888	{
889	*lid = info->core[i].lid;
890	*cxy = info->core[i].cxy;
891	*gid = global_id;
892	return 0;
893	}
894	}
895	return EINVAL;
896	}
897
898
899
900
901
902	/////////////////////////////////
903	// kleenex debug function
904	/////////////////////////////////
905	void display_fat( uint32_t step )
906	{
907	fatfs_ctx_t * fatfs_ctx = fs_context[FS_TYPE_FATFS].extend;
908	if( fatfs_ctx != NULL )
909	{
910	printk("\n[%s] step %d at cycle %d\n", __FUNCTION__, step, (uint32_t)hal_get_cycles() );
911	xptr_t mapper_xp = fatfs_ctx->fat_mapper_xp;
912	mapper_display_page( mapper_xp , 0 , 128 );
913	}
914	else
915	{
916	printk("\n[%s] step %d : fatfs context not initialized\n", __FUNCTION__, step );
917	}
918	}
919
920
921
922
923
924	///////////////////////////////////////////////////////////////////////////////////////////
925	// This function is the entry point for the kernel initialisation.
926	// It is executed by all cores in all clusters, but only core[0] initializes
927	// the shared resources such as the cluster manager, or the local peripherals.
928	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
929	// only information contained in the local boot_info_t structure, set by the bootloader.
930	// Only core[0] in cluster 0 print the log messages.
931	///////////////////////////////////////////////////////////////////////////////////////////
932	// @ info : pointer on the local boot-info structure.
933	///////////////////////////////////////////////////////////////////////////////////////////
934	void kernel_init( boot_info_t * info )
935	{
936	lid_t core_lid = -1; // running core local index
937	cxy_t core_cxy = -1; // running core cluster identifier
938	gid_t core_gid; // running core hardware identifier
939	cluster_t * cluster; // pointer on local cluster manager
940	core_t * core; // pointer on running core descriptor
941	thread_t * thread; // pointer on idle thread descriptor
942
943	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
944	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
945	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
946	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
947
948	error_t error;
949	reg_t status; // running core status register
950
951	/////////////////////////////////////////////////////////////////////////////////
952	// STEP 1 : Each core get its core identifier from boot_info, and makes
953	// a partial initialisation of its private idle thread descriptor.
954	// core[0] initializes the "local_cxy" global variable.
955	// core[0] in cluster[0] initializes the TXT0 chdev for log messages.
956	/////////////////////////////////////////////////////////////////////////////////
957
958	error = get_core_identifiers( info,
959	&core_lid,
960	&core_cxy,
961	&core_gid );
962
963	// core[0] initialize cluster identifier
964	if( core_lid == 0 ) local_cxy = info->cxy;
965
966	// each core gets a pointer on its private idle thread descriptor
967	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
968
969	// each core registers this thread pointer in hardware register
970	hal_set_current_thread( thread );
971
972	// each core register core descriptor pointer in idle thread descriptor
973	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
974
975	// each core initializes the idle thread locks counters
976	thread->busylocks = 0;
977
978	#if DEBUG_BUSYLOCK
979	// each core initialise the idle thread list of busylocks
980	xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
981	#endif
982
983	// core[0] initializes cluster info
984	if( core_lid == 0 ) cluster_info_init( info );
985
986	// core[0] in cluster[0] initialises TXT0 chdev descriptor
987	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
988
989	// all cores check identifiers
990	if( error )
991	{
992	printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
993	__FUNCTION__, core_lid, core_cxy, core_lid );
994	hal_core_sleep();
995	}
996
997	/////////////////////////////////////////////////////////////////////////////////
998	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
999	(info->x_size * info->y_size) );
1000	barrier_wait( &local_barrier , info->cores_nr );
1001	/////////////////////////////////////////////////////////////////////////////////
1002
1003	#if DEBUG_KERNEL_INIT
1004	if( (core_lid == 0) & (local_cxy == 0) )
1005	printk("\n[%s] exit barrier 1 : TXT0 initialized / cycle %d\n",
1006	__FUNCTION__, (uint32_t)hal_get_cycles() );
1007	#endif
1008
1009	/////////////////////////////////////////////////////////////////////////////////
1010	// STEP 2 : core[0] initializes the cluter manager,
1011	// including the physical memory allocator.
1012	/////////////////////////////////////////////////////////////////////////////////
1013
1014	// core[0] initialises DQDT (only core[0] in cluster 0 build the quad-tree)
1015	if( core_lid == 0 ) dqdt_init();
1016
1017	// core[0] initialize other cluster manager complex structures
1018	if( core_lid == 0 )
1019	{
1020	error = cluster_manager_init( info );
1021
1022	if( error )
1023	{
1024	printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1025	__FUNCTION__, local_cxy );
1026	hal_core_sleep();
1027	}
1028	}
1029
1030	/////////////////////////////////////////////////////////////////////////////////
1031	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1032	(info->x_size * info->y_size) );
1033	barrier_wait( &local_barrier , info->cores_nr );
1034	/////////////////////////////////////////////////////////////////////////////////
1035
1036	#if DEBUG_KERNEL_INIT
1037	if( (core_lid == 0) & (local_cxy == 0) )
1038	printk("\n[%s] exit barrier 2 : cluster manager initialized / cycle %d\n",
1039	__FUNCTION__, (uint32_t)hal_get_cycles() );
1040	#endif
1041
1042	/////////////////////////////////////////////////////////////////////////////////
1043	// STEP 3 : all cores initialize the idle thread descriptor.
1044	// core[0] initializes the process_zero descriptor,
1045	// including the kernel VMM (both GPT and VSL)
1046	/////////////////////////////////////////////////////////////////////////////////
1047
1048	// all cores get pointer on local cluster manager & core descriptor
1049	cluster = &cluster_manager;
1050	core = &cluster->core_tbl[core_lid];
1051
1052	// all cores update the register(s) defining the kernel
1053	// entry points for interrupts, exceptions and syscalls,
1054	// this must be done before VFS initialisation, because
1055	// kernel_init() uses RPCs requiring IPIs...
1056	hal_set_kentry();
1057
1058	// all cores initialize the idle thread descriptor
1059	thread_idle_init( thread,
1060	THREAD_IDLE,
1061	&thread_idle_func,
1062	NULL,
1063	core_lid );
1064
1065	// core[0] initializes the process_zero descriptor,
1066	if( core_lid == 0 ) process_zero_create( &process_zero , info );
1067
1068	/////////////////////////////////////////////////////////////////////////////////
1069	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1070	(info->x_size * info->y_size) );
1071	barrier_wait( &local_barrier , info->cores_nr );
1072	/////////////////////////////////////////////////////////////////////////////////
1073
1074	#if DEBUG_KERNEL_INIT
1075	if( (core_lid == 0) & (local_cxy == 0) )
1076	printk("\n[%s] exit barrier 3 : kernel processs initialized / cycle %d\n",
1077	__FUNCTION__, (uint32_t)hal_get_cycles() );
1078	#endif
1079
1080	/////////////////////////////////////////////////////////////////////////////////
1081	// STEP 4 : all cores initialize their private MMU
1082	// core[0] in cluster 0 initializes the IOPIC device.
1083	/////////////////////////////////////////////////////////////////////////////////
1084
1085	// all cores initialise their MMU
1086	hal_mmu_init( &process_zero.vmm.gpt );
1087
1088	// core[0] in cluster[0] initializes the PIC chdev,
1089	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1090
1091	////////////////////////////////////////////////////////////////////////////////
1092	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1093	(info->x_size * info->y_size) );
1094	barrier_wait( &local_barrier , info->cores_nr );
1095	////////////////////////////////////////////////////////////////////////////////
1096
1097	#if DEBUG_KERNEL_INIT
1098	if( (core_lid == 0) & (local_cxy == 0) )
1099	printk("\n[%s] exit barrier 4 : MMU and IOPIC initialized / cycle %d\n",
1100	__FUNCTION__, (uint32_t)hal_get_cycles() );
1101	#endif
1102
1103	////////////////////////////////////////////////////////////////////////////////
1104	// STEP 5 : core[0] initializes the distibuted LAPIC descriptor.
1105	// core[0] initializes the internal chdev descriptors
1106	// core[0] initialize the local external chdev descriptors
1107	////////////////////////////////////////////////////////////////////////////////
1108
1109	// all core[0]s initialize their local LAPIC extension,
1110	if( core_lid == 0 ) lapic_init( info );
1111
1112	// core[0] scan the internal (private) peripherals,
1113	// and allocates memory for the corresponding chdev descriptors.
1114	if( core_lid == 0 ) internal_devices_init( info );
1115
1116
1117	// All core[0]s contribute to initialise external peripheral chdev descriptors.
1118	// Each core[0][cxy] scan the set of external (shared) peripherals (but the TXT0),
1119	// and allocates memory for the chdev descriptors that must be placed
1120	// on the (cxy) cluster according to the global index value.
1121
1122	if( core_lid == 0 ) external_devices_init( info );
1123
1124	/////////////////////////////////////////////////////////////////////////////////
1125	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1126	(info->x_size * info->y_size) );
1127	barrier_wait( &local_barrier , info->cores_nr );
1128	/////////////////////////////////////////////////////////////////////////////////
1129
1130	#if DEBUG_KERNEL_INIT
1131	if( (core_lid == 0) & (local_cxy == 0) )
1132	printk("\n[%s] exit barrier 5 : chdevs initialised / cycle %d\n",
1133	__FUNCTION__, (uint32_t)hal_get_cycles() );
1134	#endif
1135
1136	#if( DEBUG_KERNEL_INIT & 1 )
1137	if( (core_lid == 0) & (local_cxy == 0) )
1138	chdev_dir_display();
1139	#endif
1140
1141	/////////////////////////////////////////////////////////////////////////////////
1142	// STEP 6 : all cores enable IPI (Inter Procesor Interrupt),
1143	// all cores unblock the idle thread, and register it in scheduler.
1144	// core[0] in cluster[0] creates the VFS root inode.
1145	// It access the boot device to initialize the file system context.
1146	/////////////////////////////////////////////////////////////////////////////////
1147
1148	// All cores enable IPI
1149	dev_pic_enable_ipi();
1150	hal_enable_irq( &status );
1151
1152	// all cores unblock the idle thread, and register it in scheduler
1153	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1154	core->scheduler.idle = thread;
1155
1156	// core[O] in cluster[0] creates the VFS root
1157	if( (core_lid == 0) && (local_cxy == 0 ) )
1158	{
1159	vfs_root_inode_xp = XPTR_NULL;
1160
1161	// Only FATFS is supported yet,
1162	// other File System can be introduced here
1163	if( CONFIG_VFS_ROOT_IS_FATFS )
1164	{
1165	// 1. allocate memory for FATFS context in cluster 0
1166	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1167
1168	if( fatfs_ctx == NULL )
1169	{
1170	printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1171	__FUNCTION__ );
1172	hal_core_sleep();
1173	}
1174
1175	// 2. access boot device to initialize FATFS context
1176	fatfs_ctx_init( fatfs_ctx );
1177
1178	// 3. get various informations from FATFS context
1179	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1180	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1181	fatfs_ctx->sectors_per_cluster;
1182	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1183
1184	// 4. create VFS root inode in cluster 0
1185	error = vfs_inode_create( FS_TYPE_FATFS, // fs_type
1186	0, // attr
1187	0, // rights
1188	0, // uid
1189	0, // gid
1190	&vfs_root_inode_xp ); // return
1191	if( error )
1192	{
1193	printk("\n[PANIC] in %s : cannot create VFS root inode in cluster 0\n",
1194	__FUNCTION__ );
1195	hal_core_sleep();
1196	}
1197
1198	// 5. update FATFS root inode "type" and "extend" fields
1199	cxy_t vfs_root_cxy = GET_CXY( vfs_root_inode_xp );
1200	vfs_inode_t * vfs_root_ptr = GET_PTR( vfs_root_inode_xp );
1201	hal_remote_s32( XPTR( vfs_root_cxy , &vfs_root_ptr->type ), INODE_TYPE_DIR );
1202	hal_remote_spt( XPTR( vfs_root_cxy , &vfs_root_ptr->extend ),
1203	(void*)(intptr_t)root_dir_cluster );
1204
1205	// 6. initialize the generic VFS context for FATFS
1206	vfs_ctx_init( FS_TYPE_FATFS, // fs type
1207	0, // attributes: unused
1208	total_clusters, // number of clusters
1209	cluster_size, // bytes
1210	vfs_root_inode_xp, // VFS root
1211	fatfs_ctx ); // extend
1212	}
1213	else
1214	{
1215	printk("\n[PANIC] in %s : unsupported VFS type in cluster 0\n",
1216	__FUNCTION__ );
1217	hal_core_sleep();
1218	}
1219
1220	// create the <.> and <..> dentries in VFS root directory
1221	// the VFS root parent inode is the VFS root inode itself
1222	vfs_add_special_dentries( vfs_root_inode_xp,
1223	vfs_root_inode_xp );
1224
1225	// register VFS root inode in process_zero descriptor of cluster 0
1226	process_zero.vfs_root_xp = vfs_root_inode_xp;
1227	process_zero.cwd_xp = vfs_root_inode_xp;
1228	}
1229
1230	/////////////////////////////////////////////////////////////////////////////////
1231	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1232	(info->x_size * info->y_size) );
1233	barrier_wait( &local_barrier , info->cores_nr );
1234	/////////////////////////////////////////////////////////////////////////////////
1235
1236	#if DEBUG_KERNEL_INIT
1237	if( (core_lid == 0) & (local_cxy == 0) )
1238	printk("\n[%s] exit barrier 6 : VFS root (%x,%x) in cluster 0 / cycle %d\n",
1239	__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1240	GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1241	#endif
1242
1243	/////////////////////////////////////////////////////////////////////////////////
1244	// STEP 7 : In all other clusters than cluster[0], the core[0] allocates memory
1245	// for the selected FS context, and initialise the local FS context and
1246	// the local VFS context from values stored in cluster 0.
1247	// They get the VFS root inode extended pointer from cluster 0.
1248	/////////////////////////////////////////////////////////////////////////////////
1249
1250	if( (core_lid == 0) && (local_cxy != 0) )
1251	{
1252	// File System must be FATFS in this implementation,
1253	// but other File System can be introduced here
1254	if( CONFIG_VFS_ROOT_IS_FATFS )
1255	{
1256	// 1. allocate memory for local FATFS context
1257	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1258
1259	// check memory
1260	if( local_fatfs_ctx == NULL )
1261	{
1262	printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1263	__FUNCTION__ , local_cxy );
1264	hal_core_sleep();
1265	}
1266
1267	// 2. get local pointer on VFS context for FATFS
1268	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1269
1270	// 3. get local pointer on FATFS context in cluster 0
1271	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1272
1273	// 4. copy FATFS context from cluster 0 to local cluster
1274	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1275	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1276
1277	// 5. copy VFS context from cluster 0 to local cluster
1278	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1279	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1280
1281	// 6. update extend field in local copy of VFS context
1282	vfs_ctx->extend = local_fatfs_ctx;
1283
1284	if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1285	{
1286	printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1287	__FUNCTION__ , local_cxy );
1288	hal_core_sleep();
1289	}
1290	}
1291
1292	// get extended pointer on VFS root inode from cluster 0
1293	vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1294
1295	// update local process_zero descriptor
1296	process_zero.vfs_root_xp = vfs_root_inode_xp;
1297	process_zero.cwd_xp = vfs_root_inode_xp;
1298	}
1299
1300	/////////////////////////////////////////////////////////////////////////////////
1301	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1302	(info->x_size * info->y_size) );
1303	barrier_wait( &local_barrier , info->cores_nr );
1304	/////////////////////////////////////////////////////////////////////////////////
1305
1306	#if DEBUG_KERNEL_INIT
1307	if( (core_lid == 0) & (local_cxy == 1) )
1308	printk("\n[%s] exit barrier 7 : VFS root (%x,%x) in cluster 1 / cycle %d\n",
1309	__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1310	GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1311	#endif
1312
1313	/////////////////////////////////////////////////////////////////////////////////
1314	// STEP 8 : core[0] in cluster 0 makes the global DEVFS initialisation:
1315	// It initializes the DEVFS context, and creates the DEVFS
1316	// "dev" and "external" inodes in cluster 0.
1317	/////////////////////////////////////////////////////////////////////////////////
1318
1319	if( (core_lid == 0) && (local_cxy == 0) )
1320	{
1321	// 1. allocate memory for DEVFS context extension in cluster 0
1322	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1323
1324	if( devfs_ctx == NULL )
1325	{
1326	printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1327	__FUNCTION__ , local_cxy );
1328	hal_core_sleep();
1329	}
1330
1331	// 2. initialize the DEVFS entry in the vfs_context[] array
1332	vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1333	0, // attributes: unused
1334	0, // total_clusters: unused
1335	0, // cluster_size: unused
1336	vfs_root_inode_xp, // VFS root
1337	devfs_ctx ); // extend
1338
1339	// 3. create "dev" and "external" inodes (directories)
1340	devfs_global_init( process_zero.vfs_root_xp,
1341	&devfs_dev_inode_xp,
1342	&devfs_external_inode_xp );
1343
1344	// 4. initializes DEVFS context extension
1345	devfs_ctx_init( devfs_ctx,
1346	devfs_dev_inode_xp,
1347	devfs_external_inode_xp );
1348	}
1349
1350	/////////////////////////////////////////////////////////////////////////////////
1351	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1352	(info->x_size * info->y_size) );
1353	barrier_wait( &local_barrier , info->cores_nr );
1354	/////////////////////////////////////////////////////////////////////////////////
1355
1356	#if DEBUG_KERNEL_INIT
1357	if( (core_lid == 0) & (local_cxy == 0) )
1358	printk("\n[%s] exit barrier 8 : DEVFS root initialized in cluster 0 / cycle %d\n",
1359	__FUNCTION__, (uint32_t)hal_get_cycles() );
1360	#endif
1361
1362	/////////////////////////////////////////////////////////////////////////////////
1363	// STEP 9 : In all clusters in parallel, core[0] completes DEVFS initialization.
1364	// Each core[0] get the "dev" and "external" extended pointers from
1365	// values stored in cluster(0), creates the DEVFS "internal" directory,
1366	// and creates the pseudo-files for all chdevs in local cluster.
1367	/////////////////////////////////////////////////////////////////////////////////
1368
1369	if( core_lid == 0 )
1370	{
1371	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1372	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1373
1374	// get pointer on DEVFS context in cluster 0
1375	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1376
1377	devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1378	devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1379
1380	// populate DEVFS in all clusters
1381	devfs_local_init( devfs_dev_inode_xp,
1382	devfs_external_inode_xp,
1383	&devfs_internal_inode_xp );
1384	}
1385
1386	/////////////////////////////////////////////////////////////////////////////////
1387	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1388	(info->x_size * info->y_size) );
1389	barrier_wait( &local_barrier , info->cores_nr );
1390	/////////////////////////////////////////////////////////////////////////////////
1391
1392	#if DEBUG_KERNEL_INIT
1393	if( (core_lid == 0) & (local_cxy == 0) )
1394	printk("\n[%s] exit barrier 9 : DEVFS initialized in cluster 0 / cycle %d\n",
1395	__FUNCTION__, (uint32_t)hal_get_cycles() );
1396	#endif
1397
1398	#if( DEBUG_KERNEL_INIT & 1 )
1399	if( (core_lid == 0) & (local_cxy == 0) )
1400	vfs_display( vfs_root_inode_xp );
1401	#endif
1402
1403	/////////////////////////////////////////////////////////////////////////////////
1404	// STEP 10 : core[0] in cluster 0 creates the first user process (process_init).
1405	// This include the first user process VMM (GPT and VSL) creation.
1406	// Finally, it prints the ALMOS-MKH banner.
1407	/////////////////////////////////////////////////////////////////////////////////
1408
1409	if( (core_lid == 0) && (local_cxy == 0) )
1410	{
1411	process_init_create();
1412	}
1413
1414	#if DEBUG_KERNEL_INIT
1415	if( (core_lid == 0) & (local_cxy == 0) )
1416	printk("\n[%s] exit barrier 10 : process_init created in cluster 0 / cycle %d\n",
1417	__FUNCTION__, (uint32_t)hal_get_cycles() );
1418	#endif
1419
1420	#if (DEBUG_KERNEL_INIT & 1)
1421	if( (core_lid == 0) & (local_cxy == 0) )
1422	sched_display( 0 );
1423	#endif
1424
1425	if( (core_lid == 0) && (local_cxy == 0) )
1426	{
1427	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1428	}
1429
1430	#if CONFIG_INSTRUMENTATION_FOOTPRINT
1431	if( (core_lid == 0) & (local_cxy == 0) )
1432	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1433	" - thread descriptor : %d bytes\n"
1434	" - process descriptor : %d bytes\n"
1435	" - cluster manager : %d bytes\n"
1436	" - chdev descriptor : %d bytes\n"
1437	" - core descriptor : %d bytes\n"
1438	" - scheduler : %d bytes\n"
1439	" - rpc fifo : %d bytes\n"
1440	" - page descriptor : %d bytes\n"
1441	" - mapper descriptor : %d bytes\n"
1442	" - vseg descriptor : %d bytes\n"
1443	" - ppm manager : %d bytes\n"
1444	" - kcm manager : %d bytes\n"
1445	" - khm manager : %d bytes\n"
1446	" - vmm manager : %d bytes\n"
1447	" - gpt root : %d bytes\n"
1448	" - vfs inode : %d bytes\n"
1449	" - vfs dentry : %d bytes\n"
1450	" - vfs file : %d bytes\n"
1451	" - vfs context : %d bytes\n"
1452	" - xhtab root : %d bytes\n"
1453	" - list item : %d bytes\n"
1454	" - xlist item : %d bytes\n"
1455	" - busylock : %d bytes\n"
1456	" - remote busylock : %d bytes\n"
1457	" - queuelock : %d bytes\n"
1458	" - remote queuelock : %d bytes\n"
1459	" - rwlock : %d bytes\n"
1460	" - remote rwlock : %d bytes\n",
1461	sizeof( thread_t ),
1462	sizeof( process_t ),
1463	sizeof( cluster_t ),
1464	sizeof( chdev_t ),
1465	sizeof( core_t ),
1466	sizeof( scheduler_t ),
1467	sizeof( remote_fifo_t ),
1468	sizeof( page_t ),
1469	sizeof( mapper_t ),
1470	sizeof( vseg_t ),
1471	sizeof( ppm_t ),
1472	sizeof( kcm_t ),
1473	sizeof( khm_t ),
1474	sizeof( vmm_t ),
1475	sizeof( gpt_t ),
1476	sizeof( vfs_inode_t ),
1477	sizeof( vfs_dentry_t ),
1478	sizeof( vfs_file_t ),
1479	sizeof( vfs_ctx_t ),
1480	sizeof( xhtab_t ),
1481	sizeof( list_entry_t ),
1482	sizeof( xlist_entry_t ),
1483	sizeof( busylock_t ),
1484	sizeof( remote_busylock_t ),
1485	sizeof( queuelock_t ),
1486	sizeof( remote_queuelock_t ),
1487	sizeof( rwlock_t ),
1488	sizeof( remote_rwlock_t ));
1489	#endif
1490
1491	// each core activates its private TICK IRQ
1492	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1493
1494	/////////////////////////////////////////////////////////////////////////////////
1495	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1496	(info->x_size * info->y_size) );
1497	barrier_wait( &local_barrier , info->cores_nr );
1498	/////////////////////////////////////////////////////////////////////////////////
1499
1500	#if DEBUG_KERNEL_INIT
1501	thread_t * this = CURRENT_THREAD;
1502	printk("\n[%s] : thread[%x,%x] on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1503	__FUNCTION__ , this->process->pid, this->trdid,
1504	local_cxy, core_lid, (uint32_t)hal_get_cycles() );
1505	#endif
1506
1507	// each core jump to thread_idle_func
1508	thread_idle_func();
1509
1510	} // end kernel_init()
1511

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