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source: trunk/kernel/kern/kernel_init.c @ 631

Last change on this file since 631 was 630, checked in by alain, 6 years ago
1) Fix a bug in the vfs_add_special_dentries() function: The <.> and <..> dentries must not be created on IOC and on the mapper for the VFS root directory. 2) Fix a bug in the hal_gpt_allocate_pt2 function, related to the use of the TSAR_LOCKED attribute to avoid concurrent mapping of the PTD1.
File size: 61.9 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	"PPM_FREE", // 2
136	"SCHED_STATE", // 3
137	"VMM_STACK", // 4
138	"VMM_MMAP", // 5
139	"VFS_CTX", // 6
140	"KCM_STATE", // 7
141	"KHM_STATE", // 8
142	"HTAB_STATE", // 9
143
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_ALMOS_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	uint32_t channels; // number of channels
280
281	// get number of peripherals and base of devices array from boot_info
282	dev_nr = info->ext_dev_nr;
283	dev_tbl = info->ext_dev;
284
285	// loop on external peripherals to find TXT device
286	for( i = 0 ; i < dev_nr ; i++ )
287	{
288	base = dev_tbl[i].base;
289	func = FUNC_FROM_TYPE( dev_tbl[i].type );
290	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
291	channels = dev_tbl[i].channels;
292
293	if (func == DEV_FUNC_TXT )
294	{
295	// initialize TXT_TX[0] chdev
296	txt0_tx_chdev.func = func;
297	txt0_tx_chdev.impl = impl;
298	txt0_tx_chdev.channel = 0;
299	txt0_tx_chdev.base = base;
300	txt0_tx_chdev.is_rx = false;
301	remote_busylock_init( XPTR( local_cxy , &txt0_tx_chdev.wait_lock ),
302	LOCK_CHDEV_TXT0 );
303
304	// initialize TXT_RX[0] chdev
305	txt0_rx_chdev.func = func;
306	txt0_rx_chdev.impl = impl;
307	txt0_rx_chdev.channel = 0;
308	txt0_rx_chdev.base = base;
309	txt0_rx_chdev.is_rx = true;
310	remote_busylock_init( XPTR( local_cxy , &txt0_rx_chdev.wait_lock ),
311	LOCK_CHDEV_TXT0 );
312
313	// make TXT specific initialisations
314	dev_txt_init( &txt0_tx_chdev );
315	dev_txt_init( &txt0_rx_chdev );
316
317	// register TXT_TX[0] & TXT_RX[0] in chdev_dir[x][y]
318	// for all valid clusters
319	for( x = 0 ; x < info->x_size ; x++ )
320	{
321	for( y = 0 ; y < info->y_size ; y++ )
322	{
323	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
324
325	if( cluster_is_active( cxy ) )
326	{
327	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
328	XPTR( local_cxy , &txt0_tx_chdev ) );
329	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_rx[0] ) ,
330	XPTR( local_cxy , &txt0_rx_chdev ) );
331	}
332	}
333	}
334
335	hal_fence();
336	}
337	} // end loop on devices
338	} // end txt0_device_init()
339
340	///////////////////////////////////////////////////////////////////////////////////////////
341	// This function allocates memory and initializes the chdev descriptors for the internal
342	// peripherals contained in the local cluster, other than the LAPIC, as specified by
343	// the boot_info, including the linking with the driver for the specified implementation.
344	// The relevant entries in all copies of the devices directory are initialised.
345	///////////////////////////////////////////////////////////////////////////////////////////
346	// @ info : pointer on the local boot-info structure.
347	///////////////////////////////////////////////////////////////////////////////////////////
348	static void __attribute__ ((noinline)) internal_devices_init( boot_info_t * info )
349	{
350	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
351	uint32_t dev_nr; // actual number of devices in this cluster
352	xptr_t base; // remote pointer on segment base
353	uint32_t func; // device functionnal index
354	uint32_t impl; // device implementation index
355	uint32_t i; // device index in dev_tbl
356	uint32_t x; // X cluster coordinate
357	uint32_t y; // Y cluster coordinate
358	uint32_t channels; // number of channels
359	uint32_t channel; // channel index
360	chdev_t * chdev_ptr; // local pointer on created chdev
361
362	// get number of internal peripherals and base from boot_info
363	dev_nr = info->int_dev_nr;
364	dev_tbl = info->int_dev;
365
366	// loop on internal peripherals
367	for( i = 0 ; i < dev_nr ; i++ )
368	{
369	base = dev_tbl[i].base;
370	channels = dev_tbl[i].channels;
371	func = FUNC_FROM_TYPE( dev_tbl[i].type );
372	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
373
374	//////////////////////////
375	if( func == DEV_FUNC_MMC )
376	{
377
378	// check channels
379	if( channels != 1 )
380	{
381	printk("\n[PANIC] in %s : MMC device must be single channel\n",
382	__FUNCTION__ );
383	hal_core_sleep();
384	}
385
386	// create chdev in local cluster
387	chdev_ptr = chdev_create( func,
388	impl,
389	0, // channel
390	false, // direction
391	base );
392
393	// check memory
394	if( chdev_ptr == NULL )
395	{
396	printk("\n[PANIC] in %s : cannot create MMC chdev\n",
397	__FUNCTION__ );
398	hal_core_sleep();
399	}
400
401	// make MMC specific initialisation
402	dev_mmc_init( chdev_ptr );
403
404	// set the MMC field in all chdev_dir[x][y] structures
405	for( x = 0 ; x < info->x_size ; x++ )
406	{
407	for( y = 0 ; y < info->y_size ; y++ )
408	{
409	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
410
411	if( cluster_is_active( cxy ) )
412	{
413	hal_remote_s64( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
414	XPTR( local_cxy , chdev_ptr ) );
415	}
416	}
417	}
418
419	#if( DEBUG_KERNEL_INIT & 0x1 )
420	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
421	printk("\n[%s] : created MMC in cluster %x / chdev = %x\n",
422	__FUNCTION__ , local_cxy , chdev_ptr );
423	#endif
424	}
425	///////////////////////////////
426	else if( func == DEV_FUNC_DMA )
427	{
428	// create one chdev per channel in local cluster
429	for( channel = 0 ; channel < channels ; channel++ )
430	{
431	// create chdev[channel] in local cluster
432	chdev_ptr = chdev_create( func,
433	impl,
434	channel,
435	false, // direction
436	base );
437
438	// check memory
439	if( chdev_ptr == NULL )
440	{
441	printk("\n[PANIC] in %s : cannot create DMA chdev\n",
442	__FUNCTION__ );
443	hal_core_sleep();
444	}
445
446	// make DMA specific initialisation
447	dev_dma_init( chdev_ptr );
448
449	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
450	// structure because the DMA device is not remotely accessible.
451	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
452
453	#if( DEBUG_KERNEL_INIT & 0x1 )
454	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
455	printk("\n[%s] : created DMA[%d] in cluster %x / chdev = %x\n",
456	__FUNCTION__ , channel , local_cxy , chdev_ptr );
457	#endif
458	}
459	}
460	}
461	} // end internal_devices_init()
462
463	///////////////////////////////////////////////////////////////////////////////////////////
464	// This function allocates memory and initializes the chdev descriptors for the
465	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
466	// This includes the dynamic linking with the driver for the specified implementation.
467	// These chdev descriptors are distributed on all clusters, using a modulo on a global
468	// index, identically computed in all clusters.
469	// This function is executed in all clusters by the core[0] core, that computes a global index
470	// for all external chdevs. Each core[0] core creates only the chdevs that must be placed in
471	// the local cluster, because the global index matches the local index.
472	// The relevant entries in all copies of the devices directory are initialised.
473	///////////////////////////////////////////////////////////////////////////////////////////
474	// @ info : pointer on the local boot-info structure.
475	///////////////////////////////////////////////////////////////////////////////////////////
476	static void external_devices_init( boot_info_t * info )
477	{
478	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
479	uint32_t dev_nr; // actual number of external devices
480	xptr_t base; // remote pointer on segment base
481	uint32_t func; // device functionnal index
482	uint32_t impl; // device implementation index
483	uint32_t i; // device index in dev_tbl
484	uint32_t x; // X cluster coordinate
485	uint32_t y; // Y cluster coordinate
486	uint32_t channels; // number of channels
487	uint32_t channel; // channel index
488	uint32_t directions; // number of directions (1 or 2)
489	uint32_t rx; // direction index (0 or 1)
490	chdev_t * chdev; // local pointer on one channel_device descriptor
491	uint32_t ext_chdev_gid; // global index of external chdev
492
493	// get number of peripherals and base of devices array from boot_info
494	dev_nr = info->ext_dev_nr;
495	dev_tbl = info->ext_dev;
496
497	// initializes global index (PIC is already placed in cluster 0
498	ext_chdev_gid = 1;
499
500	// loop on external peripherals
501	for( i = 0 ; i < dev_nr ; i++ )
502	{
503	base = dev_tbl[i].base;
504	channels = dev_tbl[i].channels;
505	func = FUNC_FROM_TYPE( dev_tbl[i].type );
506	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
507
508	// There is one chdev per direction for NIC and for TXT
509	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
510	else directions = 1;
511
512	// do nothing for ROM, that does not require a device descriptor.
513	if( func == DEV_FUNC_ROM ) continue;
514
515	// do nothing for PIC, that is already initialized
516	if( func == DEV_FUNC_PIC ) continue;
517
518	// check PIC device initialized
519	if( chdev_dir.pic == XPTR_NULL )
520	{
521	printk("\n[PANIC] in %s : PIC device must be initialized first\n",
522	__FUNCTION__ );
523	hal_core_sleep();
524	}
525
526	// check external device functionnal type
527	if( (func != DEV_FUNC_IOB) && (func != DEV_FUNC_IOC) && (func != DEV_FUNC_TXT) &&
528	(func != DEV_FUNC_NIC) && (func != DEV_FUNC_FBF) )
529	{
530	printk("\n[PANIC] in %s : undefined peripheral type\n",
531	__FUNCTION__ );
532	hal_core_sleep();
533	}
534
535	// loops on channels
536	for( channel = 0 ; channel < channels ; channel++ )
537	{
538	// loop on directions
539	for( rx = 0 ; rx < directions ; rx++ )
540	{
541	// skip TXT0 that has already been initialized
542	if( (func == DEV_FUNC_TXT) && (channel == 0) ) continue;
543
544	// all kernel instances compute the target cluster for all chdevs,
545	// computing the global index ext_chdev_gid[func,channel,direction]
546	cxy_t target_cxy;
547	while( 1 )
548	{
549	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
550	uint32_t x = offset / info->y_size;
551	uint32_t y = offset % info->y_size;
552
553	target_cxy = HAL_CXY_FROM_XY( x , y );
554
555	// exit loop if target cluster is active
556	if( cluster_is_active( target_cxy ) ) break;
557
558	// increment global index otherwise
559	ext_chdev_gid++;
560	}
561
562	// allocate and initialize a local chdev
563	// when local cluster matches target cluster
564	if( target_cxy == local_cxy )
565	{
566	chdev = chdev_create( func,
567	impl,
568	channel,
569	rx, // direction
570	base );
571
572	if( chdev == NULL )
573	{
574	printk("\n[PANIC] in %s : cannot allocate chdev\n",
575	__FUNCTION__ );
576	hal_core_sleep();
577	}
578
579	// make device type specific initialisation
580	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
581	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
582	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
583	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
584	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
585
586	// all external (shared) devices are remotely accessible
587	// initialize the replicated chdev_dir[x][y] structures
588	// defining the extended pointers on chdev descriptors
589	xptr_t * entry;
590
591	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
592	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
593	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
594	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
595	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
596	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
597	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
598
599	for( x = 0 ; x < info->x_size ; x++ )
600	{
601	for( y = 0 ; y < info->y_size ; y++ )
602	{
603	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
604
605	if( cluster_is_active( cxy ) )
606	{
607	hal_remote_s64( XPTR( cxy , entry ),
608	XPTR( local_cxy , chdev ) );
609	}
610	}
611	}
612
613	#if( DEBUG_KERNEL_INIT & 0x1 )
614	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
615	printk("\n[%s] : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
616	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
617	#endif
618	} // end if match
619
620	// increment chdev global index (matching or not)
621	ext_chdev_gid++;
622
623	} // end loop on directions
624	} // end loop on channels
625	} // end loop on devices
626	} // end external_devices_init()
627
628	///////////////////////////////////////////////////////////////////////////////////////////
629	// This function is called by core[0] in cluster 0 to allocate memory and initialize the PIC
630	// device, namely the informations attached to the external IOPIC controller, that
631	// must be replicated in all clusters (struct iopic_input).
632	// This initialisation must be done before other devices initialisation because the IRQ
633	// routing infrastructure is required for both internal and external devices init.
634	///////////////////////////////////////////////////////////////////////////////////////////
635	// @ info : pointer on the local boot-info structure.
636	///////////////////////////////////////////////////////////////////////////////////////////
637	static void __attribute__ ((noinline)) iopic_init( boot_info_t * info )
638	{
639	boot_device_t * dev_tbl; // pointer on boot_info external devices array
640	uint32_t dev_nr; // actual number of external devices
641	xptr_t base; // remote pointer on segment base
642	uint32_t func; // device functionnal index
643	uint32_t impl; // device implementation index
644	uint32_t i; // device index in dev_tbl
645	uint32_t x; // cluster X coordinate
646	uint32_t y; // cluster Y coordinate
647	bool_t found; // IOPIC found
648	chdev_t * chdev; // pointer on PIC chdev descriptor
649
650	// get number of external peripherals and base of array from boot_info
651	dev_nr = info->ext_dev_nr;
652	dev_tbl = info->ext_dev;
653
654	// avoid GCC warning
655	base = XPTR_NULL;
656	impl = 0;
657
658	// loop on external peripherals to get the IOPIC
659	for( i = 0 , found = false ; i < dev_nr ; i++ )
660	{
661	func = FUNC_FROM_TYPE( dev_tbl[i].type );
662
663	if( func == DEV_FUNC_PIC )
664	{
665	base = dev_tbl[i].base;
666	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
667	found = true;
668	break;
669	}
670	}
671
672	// check PIC existence
673	if( found == false )
674	{
675	printk("\n[PANIC] in %s : PIC device not found\n",
676	__FUNCTION__ );
677	hal_core_sleep();
678	}
679
680	// allocate and initialize the PIC chdev in cluster 0
681	chdev = chdev_create( DEV_FUNC_PIC,
682	impl,
683	0, // channel
684	0, // direction,
685	base );
686
687	// check memory
688	if( chdev == NULL )
689	{
690	printk("\n[PANIC] in %s : no memory for PIC chdev\n",
691	__FUNCTION__ );
692	hal_core_sleep();
693	}
694
695	// make PIC device type specific initialisation
696	dev_pic_init( chdev );
697
698	// register, in all clusters, the extended pointer
699	// on PIC chdev in "chdev_dir" array
700	xptr_t * entry = &chdev_dir.pic;
701
702	for( x = 0 ; x < info->x_size ; x++ )
703	{
704	for( y = 0 ; y < info->y_size ; y++ )
705	{
706	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
707
708	if( cluster_is_active( cxy ) )
709	{
710	hal_remote_s64( XPTR( cxy , entry ) ,
711	XPTR( local_cxy , chdev ) );
712	}
713	}
714	}
715
716	// initialize, in all clusters, the "iopic_input" structure
717	// defining how external IRQs are connected to IOPIC
718
719	// register default value for unused inputs
720	for( x = 0 ; x < info->x_size ; x++ )
721	{
722	for( y = 0 ; y < info->y_size ; y++ )
723	{
724	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
725
726	if( cluster_is_active( cxy ) )
727	{
728	hal_remote_memset( XPTR( cxy , &iopic_input ),
729	0xFF , sizeof(iopic_input_t) );
730	}
731	}
732	}
733
734	// register input IRQ index for valid inputs
735	uint32_t id; // input IRQ index
736	uint8_t valid; // input IRQ is connected
737	uint32_t type; // source device type
738	uint8_t channel; // source device channel
739	uint8_t is_rx; // source device direction
740	uint32_t * ptr = NULL; // local pointer on one field in iopic_input stucture
741
742	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
743	{
744	valid = dev_tbl[i].irq[id].valid;
745	type = dev_tbl[i].irq[id].dev_type;
746	channel = dev_tbl[i].irq[id].channel;
747	is_rx = dev_tbl[i].irq[id].is_rx;
748	func = FUNC_FROM_TYPE( type );
749
750	// get pointer on relevant field in iopic_input
751	if( valid )
752	{
753	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
754	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
755	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
756	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
757	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
758	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
759	else
760	{
761	printk("\n[PANIC] in %s : illegal source device for IOPIC input\n",
762	__FUNCTION__ );
763	hal_core_sleep();
764	}
765
766	// set one entry in all "iopic_input" structures
767	for( x = 0 ; x < info->x_size ; x++ )
768	{
769	for( y = 0 ; y < info->y_size ; y++ )
770	{
771	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
772
773	if( cluster_is_active( cxy ) )
774	{
775	hal_remote_s64( XPTR( cxy , ptr ) , id );
776	}
777	}
778	}
779	}
780	}
781
782	#if( DEBUG_KERNEL_INIT & 0x1 )
783	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
784	{
785	printk("\n[%s] created PIC chdev in cluster %x at cycle %d\n",
786	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
787	dev_pic_inputs_display();
788	}
789	#endif
790
791	} // end iopic_init()
792
793	///////////////////////////////////////////////////////////////////////////////////////////
794	// This function is called by all core[0]s in all cluster to complete the PIC device
795	// initialisation, namely the informations attached to the LAPIC controller.
796	// This initialisation must be done after the IOPIC initialisation, but before other
797	// devices initialisation because the IRQ routing infrastructure is required for both
798	// internal and external devices initialisation.
799	///////////////////////////////////////////////////////////////////////////////////////////
800	// @ info : pointer on the local boot-info structure.
801	///////////////////////////////////////////////////////////////////////////////////////////
802	static void __attribute__ ((noinline)) lapic_init( boot_info_t * info )
803	{
804	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
805	uint32_t dev_nr; // number of internal devices
806	uint32_t i; // device index in dev_tbl
807	xptr_t base; // remote pointer on segment base
808	uint32_t func; // device functionnal type in boot_info
809	bool_t found; // LAPIC found
810
811	// get number of internal peripherals and base
812	dev_nr = info->int_dev_nr;
813	dev_tbl = info->int_dev;
814
815	// loop on internal peripherals to get the lapic device
816	for( i = 0 , found = false ; i < dev_nr ; i++ )
817	{
818	func = FUNC_FROM_TYPE( dev_tbl[i].type );
819
820	if( func == DEV_FUNC_ICU )
821	{
822	base = dev_tbl[i].base;
823	found = true;
824	break;
825	}
826	}
827
828	// if the LAPIC controller is not defined in the boot_info,
829	// we simply don't initialize the PIC extensions in the kernel,
830	// making the assumption that the LAPIC related informations
831	// are hidden in the hardware specific PIC driver.
832	if( found )
833	{
834	// initialise the PIC extensions for
835	// the core descriptor and core manager extensions
836	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
837
838	// initialize the "lapic_input" structure
839	// defining how internal IRQs are connected to LAPIC
840	uint32_t id;
841	uint8_t valid;
842	uint8_t channel;
843	uint32_t func;
844
845	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
846	{
847	valid = dev_tbl[i].irq[id].valid;
848	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
849	channel = dev_tbl[i].irq[id].channel;
850
851	if( valid ) // only valid local IRQs are registered
852	{
853	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
854	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
855	else
856	{
857	printk("\n[PANIC] in %s : illegal source device for LAPIC input\n",
858	__FUNCTION__ );
859	hal_core_sleep();
860	}
861	}
862	}
863	}
864	} // end lapic_init()
865
866	///////////////////////////////////////////////////////////////////////////////////////////
867	// This static function returns the identifiers of the calling core.
868	///////////////////////////////////////////////////////////////////////////////////////////
869	// @ info : pointer on boot_info structure.
870	// @ lid : [out] core local index in cluster.
871	// @ cxy : [out] cluster identifier.
872	// @ lid : [out] core global identifier (hardware).
873	// @ return 0 if success / return EINVAL if not found.
874	///////////////////////////////////////////////////////////////////////////////////////////
875	static error_t __attribute__ ((noinline)) get_core_identifiers( boot_info_t * info,
876	lid_t * lid,
877	cxy_t * cxy,
878	gid_t * gid )
879	{
880	uint32_t i;
881	gid_t global_id;
882
883	// get global identifier from hardware register
884	global_id = hal_get_gid();
885
886	// makes an associative search in boot_info to get (cxy,lid) from global_id
887	for( i = 0 ; i < info->cores_nr ; i++ )
888	{
889	if( global_id == info->core[i].gid )
890	{
891	*lid = info->core[i].lid;
892	*cxy = info->core[i].cxy;
893	*gid = global_id;
894	return 0;
895	}
896	}
897	return EINVAL;
898	}
899
900
901
902
903
904	/////////////////////////////////
905	// kleenex debug function
906	/////////////////////////////////
907	void display_fat( uint32_t step )
908	{
909	fatfs_ctx_t * fatfs_ctx = fs_context[FS_TYPE_FATFS].extend;
910	if( fatfs_ctx != NULL )
911	{
912	printk("\n[%s] step %d at cycle %d\n", __FUNCTION__, step, (uint32_t)hal_get_cycles() );
913	xptr_t mapper_xp = fatfs_ctx->fat_mapper_xp;
914	mapper_display_page( mapper_xp , 0 , 128 );
915	}
916	else
917	{
918	printk("\n[%s] step %d : fatfs context not initialized\n", __FUNCTION__, step );
919	}
920	}
921
922
923
924
925
926	///////////////////////////////////////////////////////////////////////////////////////////
927	// This function is the entry point for the kernel initialisation.
928	// It is executed by all cores in all clusters, but only core[0] initializes
929	// the shared resources such as the cluster manager, or the local peripherals.
930	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
931	// only information contained in the local boot_info_t structure, set by the bootloader.
932	// Only core[0] in cluster 0 print the log messages.
933	///////////////////////////////////////////////////////////////////////////////////////////
934	// @ info : pointer on the local boot-info structure.
935	///////////////////////////////////////////////////////////////////////////////////////////
936	void kernel_init( boot_info_t * info )
937	{
938	lid_t core_lid = -1; // running core local index
939	cxy_t core_cxy = -1; // running core cluster identifier
940	gid_t core_gid; // running core hardware identifier
941	cluster_t * cluster; // pointer on local cluster manager
942	core_t * core; // pointer on running core descriptor
943	thread_t * thread; // pointer on idle thread descriptor
944
945	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
946	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
947	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
948	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
949
950	error_t error;
951	reg_t status; // running core status register
952
953	/////////////////////////////////////////////////////////////////////////////////
954	// STEP 1 : Each core get its core identifier from boot_info, and makes
955	// a partial initialisation of its private idle thread descriptor.
956	// core[0] initializes the "local_cxy" global variable.
957	// core[0] in cluster[0] initializes the TXT0 chdev for log messages.
958	/////////////////////////////////////////////////////////////////////////////////
959
960	error = get_core_identifiers( info,
961	&core_lid,
962	&core_cxy,
963	&core_gid );
964
965	// core[0] initialize cluster identifier
966	if( core_lid == 0 ) local_cxy = info->cxy;
967
968	// each core gets a pointer on its private idle thread descriptor
969	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
970
971	// each core registers this thread pointer in hardware register
972	hal_set_current_thread( thread );
973
974	// each core register core descriptor pointer in idle thread descriptor
975	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
976
977	// each core initializes the idle thread locks counters
978	thread->busylocks = 0;
979
980	#if DEBUG_BUSYLOCK
981	// each core initialise the idle thread list of busylocks
982	xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
983	#endif
984
985	// core[0] initializes cluster info
986	if( core_lid == 0 ) cluster_info_init( info );
987
988	// core[0] in cluster[0] initialises TXT0 chdev descriptor
989	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
990
991	// all cores check identifiers
992	if( error )
993	{
994	printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
995	__FUNCTION__, core_lid, core_cxy, core_lid );
996	hal_core_sleep();
997	}
998
999	/////////////////////////////////////////////////////////////////////////////////
1000	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1001	(info->x_size * info->y_size) );
1002	barrier_wait( &local_barrier , info->cores_nr );
1003	/////////////////////////////////////////////////////////////////////////////////
1004
1005	#if DEBUG_KERNEL_INIT
1006	if( (core_lid == 0) & (local_cxy == 0) )
1007	printk("\n[%s] exit barrier 1 : TXT0 initialized / cycle %d\n",
1008	__FUNCTION__, (uint32_t)hal_get_cycles() );
1009	#endif
1010
1011	/////////////////////////////////////////////////////////////////////////////////
1012	// STEP 2 : core[0] initializes the cluter manager,
1013	// including the physical memory allocator.
1014	/////////////////////////////////////////////////////////////////////////////////
1015
1016	// core[0] initialises DQDT (only core[0] in cluster 0 build the quad-tree)
1017	if( core_lid == 0 ) dqdt_init();
1018
1019	// core[0] initialize other cluster manager complex structures
1020	if( core_lid == 0 )
1021	{
1022	error = cluster_manager_init( info );
1023
1024	if( error )
1025	{
1026	printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1027	__FUNCTION__, local_cxy );
1028	hal_core_sleep();
1029	}
1030	}
1031
1032	/////////////////////////////////////////////////////////////////////////////////
1033	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1034	(info->x_size * info->y_size) );
1035	barrier_wait( &local_barrier , info->cores_nr );
1036	/////////////////////////////////////////////////////////////////////////////////
1037
1038	#if DEBUG_KERNEL_INIT
1039	if( (core_lid == 0) & (local_cxy == 0) )
1040	printk("\n[%s] exit barrier 2 : cluster manager initialized / cycle %d\n",
1041	__FUNCTION__, (uint32_t)hal_get_cycles() );
1042	#endif
1043
1044	/////////////////////////////////////////////////////////////////////////////////
1045	// STEP 3 : all cores initialize the idle thread descriptor.
1046	// core[0] initializes the process_zero descriptor,
1047	// including the kernel VMM (both GPT and VSL)
1048	/////////////////////////////////////////////////////////////////////////////////
1049
1050	// all cores get pointer on local cluster manager & core descriptor
1051	cluster = &cluster_manager;
1052	core = &cluster->core_tbl[core_lid];
1053
1054	// all cores update the register(s) defining the kernel
1055	// entry points for interrupts, exceptions and syscalls,
1056	// this must be done before VFS initialisation, because
1057	// kernel_init() uses RPCs requiring IPIs...
1058	hal_set_kentry();
1059
1060	// all cores initialize the idle thread descriptor
1061	thread_idle_init( thread,
1062	THREAD_IDLE,
1063	&thread_idle_func,
1064	NULL,
1065	core_lid );
1066
1067	// core[0] initializes the process_zero descriptor,
1068	if( core_lid == 0 ) process_zero_create( &process_zero , info );
1069
1070	/////////////////////////////////////////////////////////////////////////////////
1071	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1072	(info->x_size * info->y_size) );
1073	barrier_wait( &local_barrier , info->cores_nr );
1074	/////////////////////////////////////////////////////////////////////////////////
1075
1076	#if DEBUG_KERNEL_INIT
1077	if( (core_lid == 0) & (local_cxy == 0) )
1078	printk("\n[%s] exit barrier 3 : kernel processs initialized / cycle %d\n",
1079	__FUNCTION__, (uint32_t)hal_get_cycles() );
1080	#endif
1081
1082	/////////////////////////////////////////////////////////////////////////////////
1083	// STEP 4 : all cores initialize their private MMU
1084	// core[0] in cluster 0 initializes the IOPIC device.
1085	/////////////////////////////////////////////////////////////////////////////////
1086
1087	// all cores initialise their MMU
1088	hal_mmu_init( &process_zero.vmm.gpt );
1089
1090	// core[0] in cluster[0] initializes the PIC chdev,
1091	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1092
1093	////////////////////////////////////////////////////////////////////////////////
1094	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1095	(info->x_size * info->y_size) );
1096	barrier_wait( &local_barrier , info->cores_nr );
1097	////////////////////////////////////////////////////////////////////////////////
1098
1099	#if DEBUG_KERNEL_INIT
1100	if( (core_lid == 0) & (local_cxy == 0) )
1101	printk("\n[%s] exit barrier 4 : MMU and IOPIC initialized / cycle %d\n",
1102	__FUNCTION__, (uint32_t)hal_get_cycles() );
1103	#endif
1104
1105	////////////////////////////////////////////////////////////////////////////////
1106	// STEP 5 : core[0] initializes the distibuted LAPIC descriptor.
1107	// core[0] initializes the internal chdev descriptors
1108	// core[0] initialize the local external chdev descriptors
1109	////////////////////////////////////////////////////////////////////////////////
1110
1111	// all core[0]s initialize their local LAPIC extension,
1112	if( core_lid == 0 ) lapic_init( info );
1113
1114	// core[0] scan the internal (private) peripherals,
1115	// and allocates memory for the corresponding chdev descriptors.
1116	if( core_lid == 0 ) internal_devices_init( info );
1117
1118
1119	// All core[0]s contribute to initialise external peripheral chdev descriptors.
1120	// Each core[0][cxy] scan the set of external (shared) peripherals (but the TXT0),
1121	// and allocates memory for the chdev descriptors that must be placed
1122	// on the (cxy) cluster according to the global index value.
1123
1124	if( core_lid == 0 ) external_devices_init( info );
1125
1126	/////////////////////////////////////////////////////////////////////////////////
1127	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1128	(info->x_size * info->y_size) );
1129	barrier_wait( &local_barrier , info->cores_nr );
1130	/////////////////////////////////////////////////////////////////////////////////
1131
1132	#if DEBUG_KERNEL_INIT
1133	if( (core_lid == 0) & (local_cxy == 0) )
1134	printk("\n[%s] exit barrier 5 : chdevs initialised / cycle %d\n",
1135	__FUNCTION__, (uint32_t)hal_get_cycles() );
1136	#endif
1137
1138	#if( DEBUG_KERNEL_INIT & 1 )
1139	if( (core_lid == 0) & (local_cxy == 0) )
1140	chdev_dir_display();
1141	#endif
1142
1143	/////////////////////////////////////////////////////////////////////////////////
1144	// STEP 6 : all cores enable IPI (Inter Procesor Interrupt),
1145	// all cores unblock the idle thread, and register it in scheduler.
1146	// core[0] in cluster[0] creates the VFS root inode.
1147	// It access the boot device to initialize the file system context.
1148	/////////////////////////////////////////////////////////////////////////////////
1149
1150	// All cores enable IPI
1151	dev_pic_enable_ipi();
1152	hal_enable_irq( &status );
1153
1154	// all cores unblock the idle thread, and register it in scheduler
1155	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1156	core->scheduler.idle = thread;
1157
1158	// core[O] in cluster[0] creates the VFS root
1159	if( (core_lid == 0) && (local_cxy == 0 ) )
1160	{
1161	vfs_root_inode_xp = XPTR_NULL;
1162
1163	// Only FATFS is supported yet,
1164	// other File System can be introduced here
1165	if( CONFIG_VFS_ROOT_IS_FATFS )
1166	{
1167	// 1. allocate memory for FATFS context in cluster 0
1168	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1169
1170	if( fatfs_ctx == NULL )
1171	{
1172	printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1173	__FUNCTION__ );
1174	hal_core_sleep();
1175	}
1176
1177	// 2. access boot device to initialize FATFS context
1178	fatfs_ctx_init( fatfs_ctx );
1179
1180	// 3. get various informations from FATFS context
1181	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1182	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1183	fatfs_ctx->sectors_per_cluster;
1184	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1185
1186	// 4. create VFS root inode in cluster 0
1187	error = vfs_inode_create( FS_TYPE_FATFS, // fs_type
1188	0, // attr
1189	0, // rights
1190	0, // uid
1191	0, // gid
1192	&vfs_root_inode_xp ); // return
1193	if( error )
1194	{
1195	printk("\n[PANIC] in %s : cannot create VFS root inode in cluster 0\n",
1196	__FUNCTION__ );
1197	hal_core_sleep();
1198	}
1199
1200	// 5. update FATFS root inode "type" and "extend" fields
1201	cxy_t vfs_root_cxy = GET_CXY( vfs_root_inode_xp );
1202	vfs_inode_t * vfs_root_ptr = GET_PTR( vfs_root_inode_xp );
1203	hal_remote_s32( XPTR( vfs_root_cxy , &vfs_root_ptr->type ), INODE_TYPE_DIR );
1204	hal_remote_spt( XPTR( vfs_root_cxy , &vfs_root_ptr->extend ),
1205	(void*)(intptr_t)root_dir_cluster );
1206
1207	// 6. initialize the generic VFS context for FATFS
1208	vfs_ctx_init( FS_TYPE_FATFS, // fs type
1209	0, // attributes: unused
1210	total_clusters, // number of clusters
1211	cluster_size, // bytes
1212	vfs_root_inode_xp, // VFS root
1213	fatfs_ctx ); // extend
1214	}
1215	else
1216	{
1217	printk("\n[PANIC] in %s : unsupported VFS type in cluster 0\n",
1218	__FUNCTION__ );
1219	hal_core_sleep();
1220	}
1221
1222	// create the <.> and <..> dentries in VFS root directory
1223	// the VFS root parent inode is the VFS root inode itself
1224	vfs_add_special_dentries( vfs_root_inode_xp,
1225	vfs_root_inode_xp );
1226
1227	// register VFS root inode in process_zero descriptor of cluster 0
1228	process_zero.vfs_root_xp = vfs_root_inode_xp;
1229	process_zero.cwd_xp = vfs_root_inode_xp;
1230	}
1231
1232	/////////////////////////////////////////////////////////////////////////////////
1233	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1234	(info->x_size * info->y_size) );
1235	barrier_wait( &local_barrier , info->cores_nr );
1236	/////////////////////////////////////////////////////////////////////////////////
1237
1238	#if DEBUG_KERNEL_INIT
1239	if( (core_lid == 0) & (local_cxy == 0) )
1240	printk("\n[%s] exit barrier 6 : VFS root (%x,%x) in cluster 0 / cycle %d\n",
1241	__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1242	GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1243	#endif
1244
1245	/////////////////////////////////////////////////////////////////////////////////
1246	// STEP 7 : In all other clusters than cluster[0], the core[0] allocates memory
1247	// for the selected FS context, and initialise the local FS context and
1248	// the local VFS context from values stored in cluster 0.
1249	// They get the VFS root inode extended pointer from cluster 0.
1250	/////////////////////////////////////////////////////////////////////////////////
1251
1252	if( (core_lid == 0) && (local_cxy != 0) )
1253	{
1254	// File System must be FATFS in this implementation,
1255	// but other File System can be introduced here
1256	if( CONFIG_VFS_ROOT_IS_FATFS )
1257	{
1258	// 1. allocate memory for local FATFS context
1259	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1260
1261	// check memory
1262	if( local_fatfs_ctx == NULL )
1263	{
1264	printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1265	__FUNCTION__ , local_cxy );
1266	hal_core_sleep();
1267	}
1268
1269	// 2. get local pointer on VFS context for FATFS
1270	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1271
1272	// 3. get local pointer on FATFS context in cluster 0
1273	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1274
1275	// 4. copy FATFS context from cluster 0 to local cluster
1276	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1277	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1278
1279	// 5. copy VFS context from cluster 0 to local cluster
1280	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1281	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1282
1283	// 6. update extend field in local copy of VFS context
1284	vfs_ctx->extend = local_fatfs_ctx;
1285
1286	if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1287	{
1288	printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1289	__FUNCTION__ , local_cxy );
1290	hal_core_sleep();
1291	}
1292	}
1293
1294	// get extended pointer on VFS root inode from cluster 0
1295	vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1296
1297	// update local process_zero descriptor
1298	process_zero.vfs_root_xp = vfs_root_inode_xp;
1299	process_zero.cwd_xp = vfs_root_inode_xp;
1300	}
1301
1302	/////////////////////////////////////////////////////////////////////////////////
1303	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1304	(info->x_size * info->y_size) );
1305	barrier_wait( &local_barrier , info->cores_nr );
1306	/////////////////////////////////////////////////////////////////////////////////
1307
1308	#if DEBUG_KERNEL_INIT
1309	if( (core_lid == 0) & (local_cxy == 1) )
1310	printk("\n[%s] exit barrier 7 : VFS root (%x,%x) in cluster 1 / cycle %d\n",
1311	__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1312	GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1313	#endif
1314
1315	/////////////////////////////////////////////////////////////////////////////////
1316	// STEP 8 : core[0] in cluster 0 makes the global DEVFS initialisation:
1317	// It initializes the DEVFS context, and creates the DEVFS
1318	// "dev" and "external" inodes in cluster 0.
1319	/////////////////////////////////////////////////////////////////////////////////
1320
1321	if( (core_lid == 0) && (local_cxy == 0) )
1322	{
1323	// 1. allocate memory for DEVFS context extension in cluster 0
1324	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1325
1326	if( devfs_ctx == NULL )
1327	{
1328	printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1329	__FUNCTION__ , local_cxy );
1330	hal_core_sleep();
1331	}
1332
1333	// 2. initialize the DEVFS entry in the vfs_context[] array
1334	vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1335	0, // attributes: unused
1336	0, // total_clusters: unused
1337	0, // cluster_size: unused
1338	vfs_root_inode_xp, // VFS root
1339	devfs_ctx ); // extend
1340
1341	// 3. create "dev" and "external" inodes (directories)
1342	devfs_global_init( process_zero.vfs_root_xp,
1343	&devfs_dev_inode_xp,
1344	&devfs_external_inode_xp );
1345
1346	// 4. initializes DEVFS context extension
1347	devfs_ctx_init( devfs_ctx,
1348	devfs_dev_inode_xp,
1349	devfs_external_inode_xp );
1350	}
1351
1352	/////////////////////////////////////////////////////////////////////////////////
1353	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1354	(info->x_size * info->y_size) );
1355	barrier_wait( &local_barrier , info->cores_nr );
1356	/////////////////////////////////////////////////////////////////////////////////
1357
1358	#if DEBUG_KERNEL_INIT
1359	if( (core_lid == 0) & (local_cxy == 0) )
1360	printk("\n[%s] exit barrier 8 : DEVFS root initialized in cluster 0 / cycle %d\n",
1361	__FUNCTION__, (uint32_t)hal_get_cycles() );
1362	#endif
1363
1364	/////////////////////////////////////////////////////////////////////////////////
1365	// STEP 9 : In all clusters in parallel, core[0] completes DEVFS initialization.
1366	// Each core[0] get the "dev" and "external" extended pointers from
1367	// values stored in cluster(0), creates the DEVFS "internal" directory,
1368	// and creates the pseudo-files for all chdevs in local cluster.
1369	/////////////////////////////////////////////////////////////////////////////////
1370
1371	if( core_lid == 0 )
1372	{
1373	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1374	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1375
1376	// get pointer on DEVFS context in cluster 0
1377	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1378
1379	devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1380	devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1381
1382	// populate DEVFS in all clusters
1383	devfs_local_init( devfs_dev_inode_xp,
1384	devfs_external_inode_xp,
1385	&devfs_internal_inode_xp );
1386	}
1387
1388	/////////////////////////////////////////////////////////////////////////////////
1389	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1390	(info->x_size * info->y_size) );
1391	barrier_wait( &local_barrier , info->cores_nr );
1392	/////////////////////////////////////////////////////////////////////////////////
1393
1394	#if DEBUG_KERNEL_INIT
1395	if( (core_lid == 0) & (local_cxy == 0) )
1396	printk("\n[%s] exit barrier 9 : DEVFS initialized in cluster 0 / cycle %d\n",
1397	__FUNCTION__, (uint32_t)hal_get_cycles() );
1398	#endif
1399
1400	#if( DEBUG_KERNEL_INIT & 1 )
1401	if( (core_lid == 0) & (local_cxy == 0) )
1402	vfs_display( vfs_root_inode_xp );
1403	#endif
1404
1405	/////////////////////////////////////////////////////////////////////////////////
1406	// STEP 10 : core[0] in cluster 0 creates the first user process (process_init).
1407	// This include the first user process VMM (GPT and VSL) creation.
1408	// Finally, it prints the ALMOS-MKH banner.
1409	/////////////////////////////////////////////////////////////////////////////////
1410
1411	if( (core_lid == 0) && (local_cxy == 0) )
1412	{
1413	process_init_create();
1414	}
1415
1416	#if DEBUG_KERNEL_INIT
1417	if( (core_lid == 0) & (local_cxy == 0) )
1418	printk("\n[%s] exit barrier 10 : process_init created in cluster 0 / cycle %d\n",
1419	__FUNCTION__, (uint32_t)hal_get_cycles() );
1420	#endif
1421
1422	#if (DEBUG_KERNEL_INIT & 1)
1423	if( (core_lid == 0) & (local_cxy == 0) )
1424	sched_display( 0 );
1425	#endif
1426
1427	if( (core_lid == 0) && (local_cxy == 0) )
1428	{
1429	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1430	}
1431
1432	#if( DEBUG_KERNEL_INIT & 1 )
1433	if( (core_lid == 0) & (local_cxy == 0) )
1434	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1435	" - thread descriptor : %d bytes\n"
1436	" - process descriptor : %d bytes\n"
1437	" - cluster manager : %d bytes\n"
1438	" - chdev descriptor : %d bytes\n"
1439	" - core descriptor : %d bytes\n"
1440	" - scheduler : %d bytes\n"
1441	" - rpc fifo : %d bytes\n"
1442	" - page descriptor : %d bytes\n"
1443	" - mapper root : %d bytes\n"
1444	" - ppm manager : %d bytes\n"
1445	" - kcm manager : %d bytes\n"
1446	" - khm manager : %d bytes\n"
1447	" - vmm manager : %d bytes\n"
1448	" - gpt root : %d bytes\n"
1449	" - list item : %d bytes\n"
1450	" - xlist item : %d bytes\n"
1451	" - busylock : %d bytes\n"
1452	" - remote busylock : %d bytes\n"
1453	" - queuelock : %d bytes\n"
1454	" - remote queuelock : %d bytes\n"
1455	" - rwlock : %d bytes\n"
1456	" - remote rwlock : %d bytes\n",
1457	sizeof( thread_t ),
1458	sizeof( process_t ),
1459	sizeof( cluster_t ),
1460	sizeof( chdev_t ),
1461	sizeof( core_t ),
1462	sizeof( scheduler_t ),
1463	sizeof( remote_fifo_t ),
1464	sizeof( page_t ),
1465	sizeof( mapper_t ),
1466	sizeof( ppm_t ),
1467	sizeof( kcm_t ),
1468	sizeof( khm_t ),
1469	sizeof( vmm_t ),
1470	sizeof( gpt_t ),
1471	sizeof( list_entry_t ),
1472	sizeof( xlist_entry_t ),
1473	sizeof( busylock_t ),
1474	sizeof( remote_busylock_t ),
1475	sizeof( queuelock_t ),
1476	sizeof( remote_queuelock_t ),
1477	sizeof( rwlock_t ),
1478	sizeof( remote_rwlock_t ));
1479	#endif
1480
1481	// each core activates its private TICK IRQ
1482	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1483
1484	/////////////////////////////////////////////////////////////////////////////////
1485	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1486	(info->x_size * info->y_size) );
1487	barrier_wait( &local_barrier , info->cores_nr );
1488	/////////////////////////////////////////////////////////////////////////////////
1489
1490	#if( DEBUG_KERNEL_INIT & 1 )
1491	thread_t * this = CURRENT_THREAD;
1492	printk("\n[%s] : thread[%x,%x] on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1493	__FUNCTION__ , this->process->pid, this->trdid,
1494	local_cxy, core_lid, (uint32_t)hal_get_cycles() );
1495	#endif
1496
1497	// each core jump to thread_idle_func
1498	thread_idle_func();
1499
1500	} // end kernel_init()
1501

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