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source: trunk/kernel/kern/kernel_init.c @ 615

Last change on this file since 615 was 614, checked in by alain, 6 years ago

1) introduce a dev_ioc_sync_write() function in IOC API,

to improve the DEVFS synchronous update.

2) fix a big bug in both the user_dir_create() and user_dir_destroy()

functions: add an extended pointer on the reference client process
in the function's arguments.

File size: 60.5 KB

Line
1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017,2018)
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 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 CP0 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	// kernel_init is the entry point defined in hal/tsar_mips32/kernel.ld
128	// It is used by the bootloader.
129	extern void kernel_init( boot_info_t * info );
130
131	// This array is used for debug, and describes the kernel locks usage,
132	// It must be kept consistent with the defines in kernel_config.h file.
133	char * lock_type_str[] =
134	{
135	"unused_0", // 0
136
137	"CLUSTER_KCM", // 1
138	"PPM_FREE", // 2
139	"SCHED_STATE", // 3
140	"VMM_STACK", // 4
141	"VMM_MMAP", // 5
142	"VFS_CTX", // 6
143	"KCM_STATE", // 7
144	"KHM_STATE", // 8
145	"HTAB_STATE", // 9
146
147	"THREAD_JOIN", // 10
148	"XHTAB_STATE", // 11
149	"CHDEV_QUEUE", // 12
150	"CHDEV_TXT0", // 13
151	"CHDEV_TXTLIST", // 14
152	"PAGE_STATE", // 15
153	"MUTEX_STATE", // 16
154	"CONDVAR_STATE", // 17
155	"SEM_STATE", // 18
156	"RPOCESS_CWD", // 19
157
158	"unused_20", // 20
159
160	"CLUSTER_PREFTBL", // 21
161
162	"PPM_DIRTY", // 22
163	"CLUSTER_LOCALS", // 23
164	"CLUSTER_COPIES", // 24
165	"PROCESS_CHILDREN", // 25
166	"PROCESS_USERSYNC", // 26
167	"PROCESS_FDARRAY", // 27
168	"FATFS_FREE", // 28
169	"PROCESS_DIR", // 29
170
171	"PROCESS_THTBL", // 30
172
173	"MAPPER_STATE", // 31
174	"VFS_SIZE", // 32
175	"VFS_FILE", // 33
176	"VMM_VSL", // 34
177	"VMM_GPT", // 35
178	"VFS_MAIN", // 36
179	};
180
181	// debug variables to analyse the sys_read() and sys_write() syscalls timing
182
183	#if DEBUG_SYS_READ
184	uint32_t enter_sys_read;
185	uint32_t exit_sys_read;
186
187	uint32_t enter_devfs_read;
188	uint32_t exit_devfs_read;
189
190	uint32_t enter_txt_read;
191	uint32_t exit_txt_read;
192
193	uint32_t enter_chdev_cmd_read;
194	uint32_t exit_chdev_cmd_read;
195
196	uint32_t enter_chdev_server_read;
197	uint32_t exit_chdev_server_read;
198
199	uint32_t enter_tty_cmd_read;
200	uint32_t exit_tty_cmd_read;
201
202	uint32_t enter_tty_isr_read;
203	uint32_t exit_tty_isr_read;
204	#endif
205
206	// these debug variables are used to analyse the sys_write() syscall timing
207
208	#if DEBUG_SYS_WRITE
209	uint32_t enter_sys_write;
210	uint32_t exit_sys_write;
211
212	uint32_t enter_devfs_write;
213	uint32_t exit_devfs_write;
214
215	uint32_t enter_txt_write;
216	uint32_t exit_txt_write;
217
218	uint32_t enter_chdev_cmd_write;
219	uint32_t exit_chdev_cmd_write;
220
221	uint32_t enter_chdev_server_write;
222	uint32_t exit_chdev_server_write;
223
224	uint32_t enter_tty_cmd_write;
225	uint32_t exit_tty_cmd_write;
226
227	uint32_t enter_tty_isr_write;
228	uint32_t exit_tty_isr_write;
229	#endif
230
231	// intrumentation variables : cumulated costs per syscall type in cluster
232	uint32_t syscalls_cumul_cost[SYSCALLS_NR];
233
234	// intrumentation variables : number of syscalls per syscal type in cluster
235	uint32_t syscalls_occurences[SYSCALLS_NR];
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 CP0 core, that computes a global index
470	// for all external chdevs. Each CP0 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 CP0 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 CP0s 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	// This function is the entry point for the kernel initialisation.
902	// It is executed by all cores in all clusters, but only core[0], called CP0,
903	// initializes the shared resources such as the cluster manager, or the local peripherals.
904	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
905	// only information contained in the local boot_info_t structure, set by the bootloader.
906	// Only CP0 in cluster 0 print the log messages.
907	///////////////////////////////////////////////////////////////////////////////////////////
908	// @ info : pointer on the local boot-info structure.
909	///////////////////////////////////////////////////////////////////////////////////////////
910	void kernel_init( boot_info_t * info )
911	{
912	lid_t core_lid = -1; // running core local index
913	cxy_t core_cxy = -1; // running core cluster identifier
914	gid_t core_gid; // running core hardware identifier
915	cluster_t * cluster; // pointer on local cluster manager
916	core_t * core; // pointer on running core descriptor
917	thread_t * thread; // pointer on idle thread descriptor
918
919	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
920	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
921	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
922	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
923
924	error_t error;
925	reg_t status; // running core status register
926
927	/////////////////////////////////////////////////////////////////////////////////
928	// STEP 0 : Each core get its core identifier from boot_info, and makes
929	// a partial initialisation of its private idle thread descriptor.
930	// CP0 initializes the "local_cxy" global variable.
931	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
932	/////////////////////////////////////////////////////////////////////////////////
933
934	error = get_core_identifiers( info,
935	&core_lid,
936	&core_cxy,
937	&core_gid );
938
939	// all CP0s initialize cluster identifier
940	if( core_lid == 0 ) local_cxy = info->cxy;
941
942	// each core gets a pointer on its private idle thread descriptor
943	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
944
945	// each core registers this thread pointer in hardware register
946	hal_set_current_thread( thread );
947
948	// each core register core descriptor pointer in idle thread descriptor
949	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
950
951	// each core initializes the idle thread locks counters
952	thread->busylocks = 0;
953
954	#if DEBUG_BUSYLOCK
955	// each core initialise the idle thread list of busylocks
956	xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
957	#endif
958
959	// all CP0s initialize cluster info
960	if( core_lid == 0 ) cluster_info_init( info );
961
962	// CP0 in cluster 0 initialises TXT0 chdev descriptor
963	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
964
965	/////////////////////////////////////////////////////////////////////////////////
966	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
967	(info->x_size * info->y_size) );
968	barrier_wait( &local_barrier , info->cores_nr );
969	/////////////////////////////////////////////////////////////////////////////////
970
971	#if DEBUG_KERNEL_INIT
972	if( (core_lid == 0) & (local_cxy == 0) )
973	printk("\n[%s] : exit barrier 0 : TXT0 initialized / cycle %d\n",
974	__FUNCTION__, (uint32_t)hal_get_cycles() );
975	#endif
976
977	/////////////////////////////////////////////////////////////////////////////
978	// STEP 1 : all cores check core identifier.
979	// CP0 initializes the local cluster manager.
980	// This includes the memory allocators.
981	/////////////////////////////////////////////////////////////////////////////
982
983	// all cores check identifiers
984	if( error )
985	{
986	printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
987	__FUNCTION__, core_lid, core_cxy, core_lid );
988	hal_core_sleep();
989	}
990
991	// all CP0s initialise DQDT (only CPO in cluster 0 build the quad-tree)
992	if( core_lid == 0 ) dqdt_init();
993
994	// all CP0s initialize other cluster manager complex structures
995	if( core_lid == 0 )
996	{
997	error = cluster_manager_init( info );
998
999	if( error )
1000	{
1001	printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1002	__FUNCTION__, local_cxy );
1003	hal_core_sleep();
1004	}
1005	}
1006
1007	/////////////////////////////////////////////////////////////////////////////////
1008	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1009	(info->x_size * info->y_size) );
1010	barrier_wait( &local_barrier , info->cores_nr );
1011	/////////////////////////////////////////////////////////////////////////////////
1012
1013	#if DEBUG_KERNEL_INIT
1014	if( (core_lid == 0) & (local_cxy == 0) )
1015	printk("\n[%s] : exit barrier 1 : clusters initialised / cycle %d\n",
1016	__FUNCTION__, (uint32_t)hal_get_cycles() );
1017	#endif
1018
1019	/////////////////////////////////////////////////////////////////////////////////
1020	// STEP 2 : CP0 initializes the process_zero descriptor.
1021	// CP0 in cluster 0 initializes the IOPIC device.
1022	/////////////////////////////////////////////////////////////////////////////////
1023
1024	// all cores get pointer on local cluster manager & core descriptor
1025	cluster = &cluster_manager;
1026	core = &cluster->core_tbl[core_lid];
1027
1028	// all CP0s initialize the process_zero descriptor
1029	if( core_lid == 0 ) process_zero_create( &process_zero );
1030
1031	// CP0 in cluster 0 initializes the PIC chdev,
1032	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1033
1034	////////////////////////////////////////////////////////////////////////////////
1035	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1036	(info->x_size * info->y_size) );
1037	barrier_wait( &local_barrier , info->cores_nr );
1038	////////////////////////////////////////////////////////////////////////////////
1039
1040	#if DEBUG_KERNEL_INIT
1041	if( (core_lid == 0) & (local_cxy == 0) )
1042	printk("\n[%s] : exit barrier 2 : PIC initialised / cycle %d\n",
1043	__FUNCTION__, (uint32_t)hal_get_cycles() );
1044	#endif
1045
1046	////////////////////////////////////////////////////////////////////////////////
1047	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
1048	// CP0 initializes the internal chdev descriptors
1049	// CP0 initialize the local external chdev descriptors
1050	////////////////////////////////////////////////////////////////////////////////
1051
1052	// all CP0s initialize their local LAPIC extension,
1053	if( core_lid == 0 ) lapic_init( info );
1054
1055	// CP0 scan the internal (private) peripherals,
1056	// and allocates memory for the corresponding chdev descriptors.
1057	if( core_lid == 0 ) internal_devices_init( info );
1058
1059
1060	// All CP0s contribute to initialise external peripheral chdev descriptors.
1061	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
1062	// and allocates memory for the chdev descriptors that must be placed
1063	// on the (cxy) cluster according to the global index value.
1064
1065	if( core_lid == 0 ) external_devices_init( info );
1066
1067	/////////////////////////////////////////////////////////////////////////////////
1068	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1069	(info->x_size * info->y_size) );
1070	barrier_wait( &local_barrier , info->cores_nr );
1071	/////////////////////////////////////////////////////////////////////////////////
1072
1073	#if DEBUG_KERNEL_INIT
1074	if( (core_lid == 0) & (local_cxy == 0) )
1075	printk("\n[%s] : exit barrier 3 : all chdevs initialised / cycle %d\n",
1076	__FUNCTION__, (uint32_t)hal_get_cycles() );
1077	#endif
1078
1079	#if( DEBUG_KERNEL_INIT & 1 )
1080	if( (core_lid == 0) & (local_cxy == 0) )
1081	chdev_dir_display();
1082	#endif
1083
1084	/////////////////////////////////////////////////////////////////////////////////
1085	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
1086	// Alh cores initialize IDLE thread.
1087	// Only CP0 in cluster 0 creates the VFS root inode.
1088	// It access the boot device to initialize the file system context.
1089	/////////////////////////////////////////////////////////////////////////////////
1090
1091	// All cores enable IPI
1092	dev_pic_enable_ipi();
1093	hal_enable_irq( &status );
1094
1095	// all cores initialize the idle thread descriptor
1096	thread_idle_init( thread,
1097	THREAD_IDLE,
1098	&thread_idle_func,
1099	NULL,
1100	core_lid );
1101
1102	// all cores unblock idle thread, and register it in scheduler
1103	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1104	core->scheduler.idle = thread;
1105
1106	#if( DEBUG_KERNEL_INIT & 1 )
1107	sched_display( core_lid );
1108	#endif
1109
1110	// CPO in cluster 0 creates the VFS root
1111	if( (core_lid == 0) && (local_cxy == 0 ) )
1112	{
1113	vfs_root_inode_xp = XPTR_NULL;
1114
1115	// Only FATFS is supported yet,
1116	// other File System can be introduced here
1117	if( CONFIG_VFS_ROOT_IS_FATFS )
1118	{
1119	// 1. allocate memory for FATFS context extension in cluster 0
1120	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1121
1122	if( fatfs_ctx == NULL )
1123	{
1124	printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1125	__FUNCTION__ );
1126	hal_core_sleep();
1127	}
1128
1129	// 2. access boot device to initialize FATFS context
1130	fatfs_ctx_init( fatfs_ctx );
1131
1132	// 3. get various informations from FATFS context
1133	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1134	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1135	fatfs_ctx->sectors_per_cluster;
1136	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1137
1138	// 4. create VFS root inode in cluster 0
1139	error = vfs_inode_create( FS_TYPE_FATFS, // fs_type
1140	INODE_TYPE_DIR, // inode_type
1141	0, // attr
1142	0, // rights
1143	0, // uid
1144	0, // gid
1145	&vfs_root_inode_xp ); // return
1146	if( error )
1147	{
1148	printk("\n[PANIC] in %s : cannot create VFS root inode in cluster 0\n",
1149	__FUNCTION__ );
1150	hal_core_sleep();
1151	}
1152
1153	// 5. update FATFS root inode extension
1154	cxy_t vfs_root_cxy = GET_CXY( vfs_root_inode_xp );
1155	vfs_inode_t * vfs_root_ptr = GET_PTR( vfs_root_inode_xp );
1156	hal_remote_spt( XPTR( vfs_root_cxy , &vfs_root_ptr->extend ),
1157	(void*)(intptr_t)root_dir_cluster );
1158
1159	// 6. initialize the generic VFS context for FATFS
1160	vfs_ctx_init( FS_TYPE_FATFS, // fs type
1161	0, // attributes: unused
1162	total_clusters, // number of clusters
1163	cluster_size, // bytes
1164	vfs_root_inode_xp, // VFS root
1165	fatfs_ctx ); // extend
1166	}
1167	else
1168	{
1169	printk("\n[PANIC] in %s : unsupported VFS type in cluster 0\n",
1170	__FUNCTION__ );
1171	hal_core_sleep();
1172	}
1173
1174	// create the <.> and <..> dentries in VFS root directory
1175	// the VFS root parent inode is the VFS root inode itself
1176	vfs_add_special_dentries( vfs_root_inode_xp,
1177	vfs_root_inode_xp );
1178
1179	// register VFS root inode in process_zero descriptor of cluster 0
1180	process_zero.vfs_root_xp = vfs_root_inode_xp;
1181	process_zero.cwd_xp = vfs_root_inode_xp;
1182	}
1183
1184	/////////////////////////////////////////////////////////////////////////////////
1185	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1186	(info->x_size * info->y_size) );
1187	barrier_wait( &local_barrier , info->cores_nr );
1188	/////////////////////////////////////////////////////////////////////////////////
1189
1190	#if DEBUG_KERNEL_INIT
1191	if( (core_lid == 0) & (local_cxy == 0) )
1192	printk("\n[%s] : exit barrier 4 : VFS root (%x,%x) in cluster 0 / cycle %d\n",
1193	__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1194	GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1195	#endif
1196
1197	/////////////////////////////////////////////////////////////////////////////////
1198	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1199	// and initialise both the local FS context and the local VFS context
1200	// from values stored in cluster 0.
1201	// They get the VFS root inode extended pointer from cluster 0.
1202	/////////////////////////////////////////////////////////////////////////////////
1203
1204	if( (core_lid == 0) && (local_cxy != 0) )
1205	{
1206	// File System must be FATFS in this implementation,
1207	// but other File System can be introduced here
1208	if( CONFIG_VFS_ROOT_IS_FATFS )
1209	{
1210	// 1. allocate memory for local FATFS context
1211	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1212
1213	// check memory
1214	if( local_fatfs_ctx == NULL )
1215	{
1216	printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1217	__FUNCTION__ , local_cxy );
1218	hal_core_sleep();
1219	}
1220
1221	// 2. get local pointer on VFS context for FATFS
1222	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1223
1224	// 3. get local pointer on FATFS context in cluster 0
1225	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1226
1227	// 4. copy FATFS context from cluster 0 to local cluster
1228	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1229	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1230
1231	// 5. copy VFS context from cluster 0 to local cluster
1232	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1233	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1234
1235	// 6. update extend field in local copy of VFS context
1236	vfs_ctx->extend = local_fatfs_ctx;
1237
1238	if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1239	{
1240	printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1241	__FUNCTION__ , local_cxy );
1242	hal_core_sleep();
1243	}
1244	}
1245
1246	// get extended pointer on VFS root inode from cluster 0
1247	vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1248
1249	// update local process_zero descriptor
1250	process_zero.vfs_root_xp = vfs_root_inode_xp;
1251	process_zero.cwd_xp = vfs_root_inode_xp;
1252	}
1253
1254	/////////////////////////////////////////////////////////////////////////////////
1255	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1256	(info->x_size * info->y_size) );
1257	barrier_wait( &local_barrier , info->cores_nr );
1258	/////////////////////////////////////////////////////////////////////////////////
1259
1260	#if DEBUG_KERNEL_INIT
1261	if( (core_lid == 0) & (local_cxy == 1) )
1262	printk("\n[%s] : exit barrier 5 : VFS root (%x,%x) in cluster 1 / cycle %d\n",
1263	__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1264	GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1265	#endif
1266
1267	/////////////////////////////////////////////////////////////////////////////////
1268	// STEP 6 : CP0 in cluster 0 makes the global DEVFS tree initialisation:
1269	// It initializes the DEVFS context, and creates the DEVFS
1270	// "dev" and "external" inodes in cluster 0.
1271	/////////////////////////////////////////////////////////////////////////////////
1272
1273	if( (core_lid == 0) && (local_cxy == 0) )
1274	{
1275	// 1. allocate memory for DEVFS context extension in cluster 0
1276	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1277
1278	if( devfs_ctx == NULL )
1279	{
1280	printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1281	__FUNCTION__ , local_cxy );
1282	hal_core_sleep();
1283	}
1284
1285	// 2. initialize the DEVFS entry in the vfs_context[] array
1286	vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1287	0, // attributes: unused
1288	0, // total_clusters: unused
1289	0, // cluster_size: unused
1290	vfs_root_inode_xp, // VFS root
1291	devfs_ctx ); // extend
1292
1293	// 3. create "dev" and "external" inodes (directories)
1294	devfs_global_init( process_zero.vfs_root_xp,
1295	&devfs_dev_inode_xp,
1296	&devfs_external_inode_xp );
1297
1298	// 4. initializes DEVFS context extension
1299	devfs_ctx_init( devfs_ctx,
1300	devfs_dev_inode_xp,
1301	devfs_external_inode_xp );
1302	}
1303
1304	/////////////////////////////////////////////////////////////////////////////////
1305	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1306	(info->x_size * info->y_size) );
1307	barrier_wait( &local_barrier , info->cores_nr );
1308	/////////////////////////////////////////////////////////////////////////////////
1309
1310	#if DEBUG_KERNEL_INIT
1311	if( (core_lid == 0) & (local_cxy == 0) )
1312	printk("\n[%s] : exit barrier 6 : DEVFS root initialized in cluster 0 / cycle %d\n",
1313	__FUNCTION__, (uint32_t)hal_get_cycles() );
1314	#endif
1315
1316	/////////////////////////////////////////////////////////////////////////////////
1317	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1318	// Each CP0 get the "dev" and "external" extended pointers from
1319	// values stored in cluster 0.
1320	// Then each CP0 in cluster(i) creates the DEVFS "internal" directory,
1321	// and creates the pseudo-files for all chdevs in cluster (i).
1322	/////////////////////////////////////////////////////////////////////////////////
1323
1324	if( core_lid == 0 )
1325	{
1326	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1327	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1328
1329	// get pointer on DEVFS context in cluster 0
1330	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1331
1332	devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1333	devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1334
1335	// populate DEVFS in all clusters
1336	devfs_local_init( devfs_dev_inode_xp,
1337	devfs_external_inode_xp,
1338	&devfs_internal_inode_xp );
1339	}
1340
1341	/////////////////////////////////////////////////////////////////////////////////
1342	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1343	(info->x_size * info->y_size) );
1344	barrier_wait( &local_barrier , info->cores_nr );
1345	/////////////////////////////////////////////////////////////////////////////////
1346
1347	#if DEBUG_KERNEL_INIT
1348	if( (core_lid == 0) & (local_cxy == 0) )
1349	printk("\n[%s] : exit barrier 7 : DEV initialized in cluster 0 / cycle %d\n",
1350	__FUNCTION__, (uint32_t)hal_get_cycles() );
1351	#endif
1352
1353	/////////////////////////////////////////////////////////////////////////////////
1354	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1355	/////////////////////////////////////////////////////////////////////////////////
1356
1357	if( (core_lid == 0) && (local_cxy == 0) )
1358	{
1359
1360	#if( DEBUG_KERNEL_INIT & 1 )
1361	vfs_display( vfs_root_inode_xp );
1362	#endif
1363
1364	process_init_create();
1365	}
1366
1367	/////////////////////////////////////////////////////////////////////////////////
1368	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1369	(info->x_size * info->y_size) );
1370	barrier_wait( &local_barrier , info->cores_nr );
1371	/////////////////////////////////////////////////////////////////////////////////
1372
1373	#if DEBUG_KERNEL_INIT
1374	if( (core_lid == 0) & (local_cxy == 0) )
1375	printk("\n[%s] : exit barrier 8 : process init created / cycle %d\n",
1376	__FUNCTION__, (uint32_t)hal_get_cycles() );
1377	#endif
1378
1379	#if (DEBUG_KERNEL_INIT & 1)
1380	if( (core_lid == 0) & (local_cxy == 0) )
1381	sched_display( 0 );
1382	#endif
1383
1384	/////////////////////////////////////////////////////////////////////////////////
1385	// STEP 9 : CP0 in cluster 0 print banner
1386	/////////////////////////////////////////////////////////////////////////////////
1387
1388	if( (core_lid == 0) && (local_cxy == 0) )
1389	{
1390	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1391
1392	#if( DEBUG_KERNEL_INIT & 1 )
1393	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1394	" - thread descriptor : %d bytes\n"
1395	" - process descriptor : %d bytes\n"
1396	" - cluster manager : %d bytes\n"
1397	" - chdev descriptor : %d bytes\n"
1398	" - core descriptor : %d bytes\n"
1399	" - scheduler : %d bytes\n"
1400	" - rpc fifo : %d bytes\n"
1401	" - page descriptor : %d bytes\n"
1402	" - mapper root : %d bytes\n"
1403	" - ppm manager : %d bytes\n"
1404	" - kcm manager : %d bytes\n"
1405	" - khm manager : %d bytes\n"
1406	" - vmm manager : %d bytes\n"
1407	" - gpt root : %d bytes\n"
1408	" - list item : %d bytes\n"
1409	" - xlist item : %d bytes\n"
1410	" - busylock : %d bytes\n"
1411	" - remote busylock : %d bytes\n"
1412	" - queuelock : %d bytes\n"
1413	" - remote queuelock : %d bytes\n"
1414	" - rwlock : %d bytes\n"
1415	" - remote rwlock : %d bytes\n",
1416	sizeof( thread_t ),
1417	sizeof( process_t ),
1418	sizeof( cluster_t ),
1419	sizeof( chdev_t ),
1420	sizeof( core_t ),
1421	sizeof( scheduler_t ),
1422	sizeof( remote_fifo_t ),
1423	sizeof( page_t ),
1424	sizeof( mapper_t ),
1425	sizeof( ppm_t ),
1426	sizeof( kcm_t ),
1427	sizeof( khm_t ),
1428	sizeof( vmm_t ),
1429	sizeof( gpt_t ),
1430	sizeof( list_entry_t ),
1431	sizeof( xlist_entry_t ),
1432	sizeof( busylock_t ),
1433	sizeof( remote_busylock_t ),
1434	sizeof( queuelock_t ),
1435	sizeof( remote_queuelock_t ),
1436	sizeof( rwlock_t ),
1437	sizeof( remote_rwlock_t ));
1438	#endif
1439
1440	}
1441
1442	// each core activates its private TICK IRQ
1443	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1444
1445	/////////////////////////////////////////////////////////////////////////////////
1446	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1447	(info->x_size * info->y_size) );
1448	barrier_wait( &local_barrier , info->cores_nr );
1449	/////////////////////////////////////////////////////////////////////////////////
1450
1451	#if DEBUG_KERNEL_INIT
1452	thread_t * this = CURRENT_THREAD;
1453	printk("\n[%s] : thread[%x,%x] on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1454	__FUNCTION__ , this->process->pid, this->trdid,
1455	local_cxy, core_lid, (uint32_t)hal_get_cycles() );
1456	#endif
1457
1458	// each core jump to thread_idle_func
1459	thread_idle_func();
1460
1461	} // end kernel_init()
1462

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