Context Navigation

source: trunk/kernel/kern/kernel_init.c @ 608

Last change on this file since 608 was 601, checked in by alain, 6 years ago
Improve the FAT32 file system to support cat, rm, cp commands.
File size: 60.0 KB

Line
1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017)
6	*
7	* Copyright (c) Sorbonne Universites
8	*
9	* This file is part of ALMOS-MKH.
10	*
11	* ALMOS-MKH is free software; you can redistribute it and/or modify it
12	* under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; version 2.0 of the License.
14	*
15	* ALMOS-MKH is distributed in the hope that it will be useful, but
16	* WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18	* General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
22	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23	*/
24
25	#include <kernel_config.h>
26	#include <errno.h>
27	#include <hal_kernel_types.h>
28	#include <hal_special.h>
29	#include <hal_context.h>
30	#include <hal_irqmask.h>
31	#include <hal_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	"VFS_MAIN", // 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	"XHTAB_STATE", // 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
170	"PROCESS_THTBL", // 29
171
172	"MAPPER_STATE", // 30
173	"PROCESS_CWD", // 31
174	"VFS_INODE", // 32
175	"VFS_FILE", // 33
176	"VMM_VSL", // 34
177	"VMM_GPT", // 35
178	};
179
180	// debug variables to analyse the sys_read() and sys_write() syscalls timing
181
182	#if DEBUG_SYS_READ
183	uint32_t enter_sys_read;
184	uint32_t exit_sys_read;
185
186	uint32_t enter_devfs_read;
187	uint32_t exit_devfs_read;
188
189	uint32_t enter_txt_read;
190	uint32_t exit_txt_read;
191
192	uint32_t enter_chdev_cmd_read;
193	uint32_t exit_chdev_cmd_read;
194
195	uint32_t enter_chdev_server_read;
196	uint32_t exit_chdev_server_read;
197
198	uint32_t enter_tty_cmd_read;
199	uint32_t exit_tty_cmd_read;
200
201	uint32_t enter_tty_isr_read;
202	uint32_t exit_tty_isr_read;
203	#endif
204
205	// these debug variables are used to analyse the sys_write() syscall timing
206
207	#if DEBUG_SYS_WRITE
208	uint32_t enter_sys_write;
209	uint32_t exit_sys_write;
210
211	uint32_t enter_devfs_write;
212	uint32_t exit_devfs_write;
213
214	uint32_t enter_txt_write;
215	uint32_t exit_txt_write;
216
217	uint32_t enter_chdev_cmd_write;
218	uint32_t exit_chdev_cmd_write;
219
220	uint32_t enter_chdev_server_write;
221	uint32_t exit_chdev_server_write;
222
223	uint32_t enter_tty_cmd_write;
224	uint32_t exit_tty_cmd_write;
225
226	uint32_t enter_tty_isr_write;
227	uint32_t exit_tty_isr_write;
228	#endif
229
230	// intrumentation variables : cumulated costs per syscall type in cluster
231	uint32_t syscalls_cumul_cost[SYSCALLS_NR];
232
233	// intrumentation variables : number of syscalls per syscal type in cluster
234	uint32_t syscalls_occurences[SYSCALLS_NR];
235
236	///////////////////////////////////////////////////////////////////////////////////////////
237	// This function displays the ALMOS_MKH banner.
238	///////////////////////////////////////////////////////////////////////////////////////////
239	static void print_banner( uint32_t nclusters , uint32_t ncores )
240	{
241	printk("\n"
242	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
243	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
244	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
245	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
246	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
247	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
248	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
249	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
250	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
251	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
252	CONFIG_ALMOS_VERSION , nclusters , ncores );
253	}
254
255
256	///////////////////////////////////////////////////////////////////////////////////////////
257	// This function initializes the TXT_TX[0] and TXT_RX[0] chdev descriptors, implementing
258	// the "kernel terminal", shared by all kernel instances for debug messages.
259	// These chdev are implemented as global variables (replicated in all clusters),
260	// because this terminal is used before the kmem allocator initialisation, but only
261	// the chdevs in cluster 0 are registered in the "chdev_dir" directory.
262	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
263	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
264	// Note: The TXT_RX[0] chdev is created, but is not used by ALMOS-MKH (september 2018).
265	///////////////////////////////////////////////////////////////////////////////////////////
266	// @ info : pointer on the local boot-info structure.
267	///////////////////////////////////////////////////////////////////////////////////////////
268	static void __attribute__ ((noinline)) txt0_device_init( boot_info_t * info )
269	{
270	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
271	uint32_t dev_nr; // actual number of devices in this cluster
272	xptr_t base; // remote pointer on segment base
273	uint32_t func; // device functional index
274	uint32_t impl; // device implementation index
275	uint32_t i; // device index in dev_tbl
276	uint32_t x; // X cluster coordinate
277	uint32_t y; // Y cluster coordinate
278	uint32_t channels; // number of channels
279
280	// get number of peripherals and base of devices array from boot_info
281	dev_nr = info->ext_dev_nr;
282	dev_tbl = info->ext_dev;
283
284	// loop on external peripherals to find TXT device
285	for( i = 0 ; i < dev_nr ; i++ )
286	{
287	base = dev_tbl[i].base;
288	func = FUNC_FROM_TYPE( dev_tbl[i].type );
289	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
290	channels = dev_tbl[i].channels;
291
292	if (func == DEV_FUNC_TXT )
293	{
294	// initialize TXT_TX[0] chdev
295	txt0_tx_chdev.func = func;
296	txt0_tx_chdev.impl = impl;
297	txt0_tx_chdev.channel = 0;
298	txt0_tx_chdev.base = base;
299	txt0_tx_chdev.is_rx = false;
300	remote_busylock_init( XPTR( local_cxy , &txt0_tx_chdev.wait_lock ),
301	LOCK_CHDEV_TXT0 );
302
303	// initialize TXT_RX[0] chdev
304	txt0_rx_chdev.func = func;
305	txt0_rx_chdev.impl = impl;
306	txt0_rx_chdev.channel = 0;
307	txt0_rx_chdev.base = base;
308	txt0_rx_chdev.is_rx = true;
309	remote_busylock_init( XPTR( local_cxy , &txt0_rx_chdev.wait_lock ),
310	LOCK_CHDEV_TXT0 );
311
312	// make TXT specific initialisations
313	dev_txt_init( &txt0_tx_chdev );
314	dev_txt_init( &txt0_rx_chdev );
315
316	// register TXT_TX[0] & TXT_RX[0] in chdev_dir[x][y]
317	// for all valid clusters
318	for( x = 0 ; x < info->x_size ; x++ )
319	{
320	for( y = 0 ; y < info->y_size ; y++ )
321	{
322	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
323
324	if( cluster_is_active( cxy ) )
325	{
326	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
327	XPTR( local_cxy , &txt0_tx_chdev ) );
328	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_rx[0] ) ,
329	XPTR( local_cxy , &txt0_rx_chdev ) );
330	}
331	}
332	}
333
334	hal_fence();
335	}
336	} // end loop on devices
337	} // end txt0_device_init()
338
339	///////////////////////////////////////////////////////////////////////////////////////////
340	// This function allocates memory and initializes the chdev descriptors for the internal
341	// peripherals contained in the local cluster, other than the LAPIC, as specified by
342	// the boot_info, including the linking with the driver for the specified implementation.
343	// The relevant entries in all copies of the devices directory are initialised.
344	///////////////////////////////////////////////////////////////////////////////////////////
345	// @ info : pointer on the local boot-info structure.
346	///////////////////////////////////////////////////////////////////////////////////////////
347	static void __attribute__ ((noinline)) internal_devices_init( boot_info_t * info )
348	{
349	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
350	uint32_t dev_nr; // actual number of devices in this cluster
351	xptr_t base; // remote pointer on segment base
352	uint32_t func; // device functionnal index
353	uint32_t impl; // device implementation index
354	uint32_t i; // device index in dev_tbl
355	uint32_t x; // X cluster coordinate
356	uint32_t y; // Y cluster coordinate
357	uint32_t channels; // number of channels
358	uint32_t channel; // channel index
359	chdev_t * chdev_ptr; // local pointer on created chdev
360
361	// get number of internal peripherals and base from boot_info
362	dev_nr = info->int_dev_nr;
363	dev_tbl = info->int_dev;
364
365	// loop on internal peripherals
366	for( i = 0 ; i < dev_nr ; i++ )
367	{
368	base = dev_tbl[i].base;
369	channels = dev_tbl[i].channels;
370	func = FUNC_FROM_TYPE( dev_tbl[i].type );
371	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
372
373	//////////////////////////
374	if( func == DEV_FUNC_MMC )
375	{
376
377	// check channels
378	if( channels != 1 )
379	{
380	printk("\n[PANIC] in %s : MMC device must be single channel\n",
381	__FUNCTION__ );
382	hal_core_sleep();
383	}
384
385	// create chdev in local cluster
386	chdev_ptr = chdev_create( func,
387	impl,
388	0, // channel
389	false, // direction
390	base );
391
392	// check memory
393	if( chdev_ptr == NULL )
394	{
395	printk("\n[PANIC] in %s : cannot create MMC chdev\n",
396	__FUNCTION__ );
397	hal_core_sleep();
398	}
399
400	// make MMC specific initialisation
401	dev_mmc_init( chdev_ptr );
402
403	// set the MMC field in all chdev_dir[x][y] structures
404	for( x = 0 ; x < info->x_size ; x++ )
405	{
406	for( y = 0 ; y < info->y_size ; y++ )
407	{
408	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
409
410	if( cluster_is_active( cxy ) )
411	{
412	hal_remote_s64( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
413	XPTR( local_cxy , chdev_ptr ) );
414	}
415	}
416	}
417
418	#if( DEBUG_KERNEL_INIT & 0x1 )
419	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
420	printk("\n[%s] : created MMC in cluster %x / chdev = %x\n",
421	__FUNCTION__ , local_cxy , chdev_ptr );
422	#endif
423	}
424	///////////////////////////////
425	else if( func == DEV_FUNC_DMA )
426	{
427	// create one chdev per channel in local cluster
428	for( channel = 0 ; channel < channels ; channel++ )
429	{
430	// create chdev[channel] in local cluster
431	chdev_ptr = chdev_create( func,
432	impl,
433	channel,
434	false, // direction
435	base );
436
437	// check memory
438	if( chdev_ptr == NULL )
439	{
440	printk("\n[PANIC] in %s : cannot create DMA chdev\n",
441	__FUNCTION__ );
442	hal_core_sleep();
443	}
444
445	// make DMA specific initialisation
446	dev_dma_init( chdev_ptr );
447
448	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
449	// structure because the DMA device is not remotely accessible.
450	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
451
452	#if( DEBUG_KERNEL_INIT & 0x1 )
453	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
454	printk("\n[%s] : created DMA[%d] in cluster %x / chdev = %x\n",
455	__FUNCTION__ , channel , local_cxy , chdev_ptr );
456	#endif
457	}
458	}
459	}
460	} // end internal_devices_init()
461
462	///////////////////////////////////////////////////////////////////////////////////////////
463	// This function allocates memory and initializes the chdev descriptors for the
464	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
465	// This includes the dynamic linking with the driver for the specified implementation.
466	// These chdev descriptors are distributed on all clusters, using a modulo on a global
467	// index, identically computed in all clusters.
468	// This function is executed in all clusters by the CP0 core, that computes a global index
469	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
470	// the local cluster, because the global index matches the local index.
471	// The relevant entries in all copies of the devices directory are initialised.
472	///////////////////////////////////////////////////////////////////////////////////////////
473	// @ info : pointer on the local boot-info structure.
474	///////////////////////////////////////////////////////////////////////////////////////////
475	static void external_devices_init( boot_info_t * info )
476	{
477	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
478	uint32_t dev_nr; // actual number of external devices
479	xptr_t base; // remote pointer on segment base
480	uint32_t func; // device functionnal index
481	uint32_t impl; // device implementation index
482	uint32_t i; // device index in dev_tbl
483	uint32_t x; // X cluster coordinate
484	uint32_t y; // Y cluster coordinate
485	uint32_t channels; // number of channels
486	uint32_t channel; // channel index
487	uint32_t directions; // number of directions (1 or 2)
488	uint32_t rx; // direction index (0 or 1)
489	chdev_t * chdev; // local pointer on one channel_device descriptor
490	uint32_t ext_chdev_gid; // global index of external chdev
491
492	// get number of peripherals and base of devices array from boot_info
493	dev_nr = info->ext_dev_nr;
494	dev_tbl = info->ext_dev;
495
496	// initializes global index (PIC is already placed in cluster 0
497	ext_chdev_gid = 1;
498
499	// loop on external peripherals
500	for( i = 0 ; i < dev_nr ; i++ )
501	{
502	base = dev_tbl[i].base;
503	channels = dev_tbl[i].channels;
504	func = FUNC_FROM_TYPE( dev_tbl[i].type );
505	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
506
507	// There is one chdev per direction for NIC and for TXT
508	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
509	else directions = 1;
510
511	// do nothing for ROM, that does not require a device descriptor.
512	if( func == DEV_FUNC_ROM ) continue;
513
514	// do nothing for PIC, that is already initialized
515	if( func == DEV_FUNC_PIC ) continue;
516
517	// check PIC device initialized
518	if( chdev_dir.pic == XPTR_NULL )
519	{
520	printk("\n[PANIC] in %s : PIC device must be initialized first\n",
521	__FUNCTION__ );
522	hal_core_sleep();
523	}
524
525	// check external device functionnal type
526	if( (func != DEV_FUNC_IOB) && (func != DEV_FUNC_IOC) && (func != DEV_FUNC_TXT) &&
527	(func != DEV_FUNC_NIC) && (func != DEV_FUNC_FBF) )
528	{
529	printk("\n[PANIC] in %s : undefined peripheral type\n",
530	__FUNCTION__ );
531	hal_core_sleep();
532	}
533
534	// loops on channels
535	for( channel = 0 ; channel < channels ; channel++ )
536	{
537	// loop on directions
538	for( rx = 0 ; rx < directions ; rx++ )
539	{
540	// skip TXT0 that has already been initialized
541	if( (func == DEV_FUNC_TXT) && (channel == 0) ) continue;
542
543	// all kernel instances compute the target cluster for all chdevs,
544	// computing the global index ext_chdev_gid[func,channel,direction]
545	cxy_t target_cxy;
546	while( 1 )
547	{
548	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
549	uint32_t x = offset / info->y_size;
550	uint32_t y = offset % info->y_size;
551
552	target_cxy = HAL_CXY_FROM_XY( x , y );
553
554	// exit loop if target cluster is active
555	if( cluster_is_active( target_cxy ) ) break;
556
557	// increment global index otherwise
558	ext_chdev_gid++;
559	}
560
561	// allocate and initialize a local chdev
562	// when local cluster matches target cluster
563	if( target_cxy == local_cxy )
564	{
565	chdev = chdev_create( func,
566	impl,
567	channel,
568	rx, // direction
569	base );
570
571	if( chdev == NULL )
572	{
573	printk("\n[PANIC] in %s : cannot allocate chdev\n",
574	__FUNCTION__ );
575	hal_core_sleep();
576	}
577
578	// make device type specific initialisation
579	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
580	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
581	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
582	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
583	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
584
585	// all external (shared) devices are remotely accessible
586	// initialize the replicated chdev_dir[x][y] structures
587	// defining the extended pointers on chdev descriptors
588	xptr_t * entry;
589
590	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
591	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
592	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
593	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
594	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
595	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
596	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
597
598	for( x = 0 ; x < info->x_size ; x++ )
599	{
600	for( y = 0 ; y < info->y_size ; y++ )
601	{
602	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
603
604	if( cluster_is_active( cxy ) )
605	{
606	hal_remote_s64( XPTR( cxy , entry ),
607	XPTR( local_cxy , chdev ) );
608	}
609	}
610	}
611
612	#if( DEBUG_KERNEL_INIT & 0x1 )
613	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
614	printk("\n[%s] : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
615	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
616	#endif
617	} // end if match
618
619	// increment chdev global index (matching or not)
620	ext_chdev_gid++;
621
622	} // end loop on directions
623	} // end loop on channels
624	} // end loop on devices
625	} // end external_devices_init()
626
627	///////////////////////////////////////////////////////////////////////////////////////////
628	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
629	// device, namely the informations attached to the external IOPIC controller, that
630	// must be replicated in all clusters (struct iopic_input).
631	// This initialisation must be done before other devices initialisation because the IRQ
632	// routing infrastructure is required for both internal and external devices init.
633	///////////////////////////////////////////////////////////////////////////////////////////
634	// @ info : pointer on the local boot-info structure.
635	///////////////////////////////////////////////////////////////////////////////////////////
636	static void __attribute__ ((noinline)) iopic_init( boot_info_t * info )
637	{
638	boot_device_t * dev_tbl; // pointer on boot_info external devices array
639	uint32_t dev_nr; // actual number of external devices
640	xptr_t base; // remote pointer on segment base
641	uint32_t func; // device functionnal index
642	uint32_t impl; // device implementation index
643	uint32_t i; // device index in dev_tbl
644	uint32_t x; // cluster X coordinate
645	uint32_t y; // cluster Y coordinate
646	bool_t found; // IOPIC found
647	chdev_t * chdev; // pointer on PIC chdev descriptor
648
649	// get number of external peripherals and base of array from boot_info
650	dev_nr = info->ext_dev_nr;
651	dev_tbl = info->ext_dev;
652
653	// avoid GCC warning
654	base = XPTR_NULL;
655	impl = 0;
656
657	// loop on external peripherals to get the IOPIC
658	for( i = 0 , found = false ; i < dev_nr ; i++ )
659	{
660	func = FUNC_FROM_TYPE( dev_tbl[i].type );
661
662	if( func == DEV_FUNC_PIC )
663	{
664	base = dev_tbl[i].base;
665	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
666	found = true;
667	break;
668	}
669	}
670
671	// check PIC existence
672	if( found == false )
673	{
674	printk("\n[PANIC] in %s : PIC device not found\n",
675	__FUNCTION__ );
676	hal_core_sleep();
677	}
678
679	// allocate and initialize the PIC chdev in cluster 0
680	chdev = chdev_create( DEV_FUNC_PIC,
681	impl,
682	0, // channel
683	0, // direction,
684	base );
685
686	// check memory
687	if( chdev == NULL )
688	{
689	printk("\n[PANIC] in %s : no memory for PIC chdev\n",
690	__FUNCTION__ );
691	hal_core_sleep();
692	}
693
694	// make PIC device type specific initialisation
695	dev_pic_init( chdev );
696
697	// register, in all clusters, the extended pointer
698	// on PIC chdev in "chdev_dir" array
699	xptr_t * entry = &chdev_dir.pic;
700
701	for( x = 0 ; x < info->x_size ; x++ )
702	{
703	for( y = 0 ; y < info->y_size ; y++ )
704	{
705	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
706
707	if( cluster_is_active( cxy ) )
708	{
709	hal_remote_s64( XPTR( cxy , entry ) ,
710	XPTR( local_cxy , chdev ) );
711	}
712	}
713	}
714
715	// initialize, in all clusters, the "iopic_input" structure
716	// defining how external IRQs are connected to IOPIC
717
718	// register default value for unused inputs
719	for( x = 0 ; x < info->x_size ; x++ )
720	{
721	for( y = 0 ; y < info->y_size ; y++ )
722	{
723	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
724
725	if( cluster_is_active( cxy ) )
726	{
727	hal_remote_memset( XPTR( cxy , &iopic_input ),
728	0xFF , sizeof(iopic_input_t) );
729	}
730	}
731	}
732
733	// register input IRQ index for valid inputs
734	uint32_t id; // input IRQ index
735	uint8_t valid; // input IRQ is connected
736	uint32_t type; // source device type
737	uint8_t channel; // source device channel
738	uint8_t is_rx; // source device direction
739	uint32_t * ptr = NULL; // local pointer on one field in iopic_input stucture
740
741	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
742	{
743	valid = dev_tbl[i].irq[id].valid;
744	type = dev_tbl[i].irq[id].dev_type;
745	channel = dev_tbl[i].irq[id].channel;
746	is_rx = dev_tbl[i].irq[id].is_rx;
747	func = FUNC_FROM_TYPE( type );
748
749	// get pointer on relevant field in iopic_input
750	if( valid )
751	{
752	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
753	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
754	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
755	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
756	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
757	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
758	else
759	{
760	printk("\n[PANIC] in %s : illegal source device for IOPIC input\n",
761	__FUNCTION__ );
762	hal_core_sleep();
763	}
764
765	// set one entry in all "iopic_input" structures
766	for( x = 0 ; x < info->x_size ; x++ )
767	{
768	for( y = 0 ; y < info->y_size ; y++ )
769	{
770	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
771
772	if( cluster_is_active( cxy ) )
773	{
774	hal_remote_s64( XPTR( cxy , ptr ) , id );
775	}
776	}
777	}
778	}
779	}
780
781	#if( DEBUG_KERNEL_INIT & 0x1 )
782	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
783	{
784	printk("\n[%s] created PIC chdev in cluster %x at cycle %d\n",
785	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
786	dev_pic_inputs_display();
787	}
788	#endif
789
790	} // end iopic_init()
791
792	///////////////////////////////////////////////////////////////////////////////////////////
793	// This function is called by all CP0s in all cluster to complete the PIC device
794	// initialisation, namely the informations attached to the LAPIC controller.
795	// This initialisation must be done after the IOPIC initialisation, but before other
796	// devices initialisation because the IRQ routing infrastructure is required for both
797	// internal and external devices initialisation.
798	///////////////////////////////////////////////////////////////////////////////////////////
799	// @ info : pointer on the local boot-info structure.
800	///////////////////////////////////////////////////////////////////////////////////////////
801	static void __attribute__ ((noinline)) lapic_init( boot_info_t * info )
802	{
803	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
804	uint32_t dev_nr; // number of internal devices
805	uint32_t i; // device index in dev_tbl
806	xptr_t base; // remote pointer on segment base
807	uint32_t func; // device functionnal type in boot_info
808	bool_t found; // LAPIC found
809
810	// get number of internal peripherals and base
811	dev_nr = info->int_dev_nr;
812	dev_tbl = info->int_dev;
813
814	// loop on internal peripherals to get the lapic device
815	for( i = 0 , found = false ; i < dev_nr ; i++ )
816	{
817	func = FUNC_FROM_TYPE( dev_tbl[i].type );
818
819	if( func == DEV_FUNC_ICU )
820	{
821	base = dev_tbl[i].base;
822	found = true;
823	break;
824	}
825	}
826
827	// if the LAPIC controller is not defined in the boot_info,
828	// we simply don't initialize the PIC extensions in the kernel,
829	// making the assumption that the LAPIC related informations
830	// are hidden in the hardware specific PIC driver.
831	if( found )
832	{
833	// initialise the PIC extensions for
834	// the core descriptor and core manager extensions
835	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
836
837	// initialize the "lapic_input" structure
838	// defining how internal IRQs are connected to LAPIC
839	uint32_t id;
840	uint8_t valid;
841	uint8_t channel;
842	uint32_t func;
843
844	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
845	{
846	valid = dev_tbl[i].irq[id].valid;
847	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
848	channel = dev_tbl[i].irq[id].channel;
849
850	if( valid ) // only valid local IRQs are registered
851	{
852	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
853	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
854	else
855	{
856	printk("\n[PANIC] in %s : illegal source device for LAPIC input\n",
857	__FUNCTION__ );
858	hal_core_sleep();
859	}
860	}
861	}
862	}
863	} // end lapic_init()
864
865	///////////////////////////////////////////////////////////////////////////////////////////
866	// This static function returns the identifiers of the calling core.
867	///////////////////////////////////////////////////////////////////////////////////////////
868	// @ info : pointer on boot_info structure.
869	// @ lid : [out] core local index in cluster.
870	// @ cxy : [out] cluster identifier.
871	// @ lid : [out] core global identifier (hardware).
872	// @ return 0 if success / return EINVAL if not found.
873	///////////////////////////////////////////////////////////////////////////////////////////
874	static error_t __attribute__ ((noinline)) get_core_identifiers( boot_info_t * info,
875	lid_t * lid,
876	cxy_t * cxy,
877	gid_t * gid )
878	{
879	uint32_t i;
880	gid_t global_id;
881
882	// get global identifier from hardware register
883	global_id = hal_get_gid();
884
885	// makes an associative search in boot_info to get (cxy,lid) from global_id
886	for( i = 0 ; i < info->cores_nr ; i++ )
887	{
888	if( global_id == info->core[i].gid )
889	{
890	*lid = info->core[i].lid;
891	*cxy = info->core[i].cxy;
892	*gid = global_id;
893	return 0;
894	}
895	}
896	return EINVAL;
897	}
898
899	///////////////////////////////////////////////////////////////////////////////////////////
900	// This function is the entry point for the kernel initialisation.
901	// It is executed by all cores in all clusters, but only core[0], called CP0,
902	// initializes the shared resources such as the cluster manager, or the local peripherals.
903	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
904	// only information contained in the local boot_info_t structure, set by the bootloader.
905	// Only CP0 in cluster 0 print the log messages.
906	///////////////////////////////////////////////////////////////////////////////////////////
907	// @ info : pointer on the local boot-info structure.
908	///////////////////////////////////////////////////////////////////////////////////////////
909	void kernel_init( boot_info_t * info )
910	{
911	lid_t core_lid = -1; // running core local index
912	cxy_t core_cxy = -1; // running core cluster identifier
913	gid_t core_gid; // running core hardware identifier
914	cluster_t * cluster; // pointer on local cluster manager
915	core_t * core; // pointer on running core descriptor
916	thread_t * thread; // pointer on idle thread descriptor
917
918	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
919	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
920	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
921	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
922
923	error_t error;
924	reg_t status; // running core status register
925
926	/////////////////////////////////////////////////////////////////////////////////
927	// STEP 0 : Each core get its core identifier from boot_info, and makes
928	// a partial initialisation of its private idle thread descriptor.
929	// CP0 initializes the "local_cxy" global variable.
930	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
931	/////////////////////////////////////////////////////////////////////////////////
932
933	error = get_core_identifiers( info,
934	&core_lid,
935	&core_cxy,
936	&core_gid );
937
938	// all CP0s initialize cluster identifier
939	if( core_lid == 0 ) local_cxy = info->cxy;
940
941	// each core gets a pointer on its private idle thread descriptor
942	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
943
944	// each core registers this thread pointer in hardware register
945	hal_set_current_thread( thread );
946
947	// each core register core descriptor pointer in idle thread descriptor
948	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
949
950	// each core initializes the idle thread locks counters
951	thread->busylocks = 0;
952
953	#if DEBUG_BUSYLOCK
954	// each core initialise the idle thread list of busylocks
955	xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
956	#endif
957
958	// all CP0s initialize cluster info
959	if( core_lid == 0 ) cluster_info_init( info );
960
961	// CP0 in cluster 0 initialises TXT0 chdev descriptor
962	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
963
964	/////////////////////////////////////////////////////////////////////////////////
965	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
966	(info->x_size * info->y_size) );
967	barrier_wait( &local_barrier , info->cores_nr );
968	/////////////////////////////////////////////////////////////////////////////////
969
970	#if DEBUG_KERNEL_INIT
971	if( (core_lid == 0) & (local_cxy == 0) )
972	printk("\n[%s] : exit barrier 0 : TXT0 initialized / sr %x / cycle %d\n",
973	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
974	#endif
975
976	/////////////////////////////////////////////////////////////////////////////
977	// STEP 1 : all cores check core identifier.
978	// CP0 initializes the local cluster manager.
979	// This includes the memory allocators.
980	/////////////////////////////////////////////////////////////////////////////
981
982	// all cores check identifiers
983	if( error )
984	{
985	printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
986	__FUNCTION__, core_lid, core_cxy, core_lid );
987	hal_core_sleep();
988	}
989
990	// all CP0s initialise DQDT (only CPO in cluster 0 build the quad-tree)
991	if( core_lid == 0 ) dqdt_init();
992
993	// all CP0s initialize other cluster manager complex structures
994	if( core_lid == 0 )
995	{
996	error = cluster_manager_init( info );
997
998	if( error )
999	{
1000	printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1001	__FUNCTION__, local_cxy );
1002	hal_core_sleep();
1003	}
1004	}
1005
1006	/////////////////////////////////////////////////////////////////////////////////
1007	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1008	(info->x_size * info->y_size) );
1009	barrier_wait( &local_barrier , info->cores_nr );
1010	/////////////////////////////////////////////////////////////////////////////////
1011
1012	#if DEBUG_KERNEL_INIT
1013	if( (core_lid == 0) & (local_cxy == 0) )
1014	printk("\n[%s] : exit barrier 1 : clusters initialised / sr %x / cycle %d\n",
1015	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1016	#endif
1017
1018	/////////////////////////////////////////////////////////////////////////////////
1019	// STEP 2 : CP0 initializes the process_zero descriptor.
1020	// CP0 in cluster 0 initializes the IOPIC device.
1021	/////////////////////////////////////////////////////////////////////////////////
1022
1023	// all cores get pointer on local cluster manager & core descriptor
1024	cluster = &cluster_manager;
1025	core = &cluster->core_tbl[core_lid];
1026
1027	// all CP0s initialize the process_zero descriptor
1028	if( core_lid == 0 ) process_zero_create( &process_zero );
1029
1030	// CP0 in cluster 0 initializes the PIC chdev,
1031	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1032
1033	////////////////////////////////////////////////////////////////////////////////
1034	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1035	(info->x_size * info->y_size) );
1036	barrier_wait( &local_barrier , info->cores_nr );
1037	////////////////////////////////////////////////////////////////////////////////
1038
1039	#if DEBUG_KERNEL_INIT
1040	if( (core_lid == 0) & (local_cxy == 0) )
1041	printk("\n[%s] : exit barrier 2 : PIC initialised / sr %x / cycle %d\n",
1042	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1043	#endif
1044
1045	////////////////////////////////////////////////////////////////////////////////
1046	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
1047	// CP0 initializes the internal chdev descriptors
1048	// CP0 initialize the local external chdev descriptors
1049	////////////////////////////////////////////////////////////////////////////////
1050
1051	// all CP0s initialize their local LAPIC extension,
1052	if( core_lid == 0 ) lapic_init( info );
1053
1054	// CP0 scan the internal (private) peripherals,
1055	// and allocates memory for the corresponding chdev descriptors.
1056	if( core_lid == 0 ) internal_devices_init( info );
1057
1058
1059	// All CP0s contribute to initialise external peripheral chdev descriptors.
1060	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
1061	// and allocates memory for the chdev descriptors that must be placed
1062	// on the (cxy) cluster according to the global index value.
1063
1064	if( core_lid == 0 ) external_devices_init( info );
1065
1066	/////////////////////////////////////////////////////////////////////////////////
1067	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1068	(info->x_size * info->y_size) );
1069	barrier_wait( &local_barrier , info->cores_nr );
1070	/////////////////////////////////////////////////////////////////////////////////
1071
1072	#if DEBUG_KERNEL_INIT
1073	if( (core_lid == 0) & (local_cxy == 0) )
1074	printk("\n[%s] : exit barrier 3 : all chdevs initialised / sr %x / cycle %d\n",
1075	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1076	#endif
1077
1078	#if( DEBUG_KERNEL_INIT & 1 )
1079	if( (core_lid == 0) & (local_cxy == 0) )
1080	chdev_dir_display();
1081	#endif
1082
1083	/////////////////////////////////////////////////////////////////////////////////
1084	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
1085	// Alh cores initialize IDLE thread.
1086	// Only CP0 in cluster 0 creates the VFS root inode.
1087	// It access the boot device to initialize the file system context.
1088	/////////////////////////////////////////////////////////////////////////////////
1089
1090	// All cores enable IPI
1091	dev_pic_enable_ipi();
1092	hal_enable_irq( &status );
1093
1094	// all cores initialize the idle thread descriptor
1095	thread_idle_init( thread,
1096	THREAD_IDLE,
1097	&thread_idle_func,
1098	NULL,
1099	core_lid );
1100
1101	// all cores unblock idle thread, and register it in scheduler
1102	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1103	core->scheduler.idle = thread;
1104
1105	#if( DEBUG_KERNEL_INIT & 1 )
1106	sched_display( core_lid );
1107	#endif
1108
1109	// CPO in cluster 0 creates the VFS root
1110	if( (core_lid == 0) && (local_cxy == 0 ) )
1111	{
1112	vfs_root_inode_xp = XPTR_NULL;
1113
1114	// File System must be FATFS in this implementation,
1115	// but other File System can be introduced here
1116	if( CONFIG_VFS_ROOT_IS_FATFS )
1117	{
1118	// 1. allocate memory for FATFS context extension in cluster 0
1119	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1120
1121	if( fatfs_ctx == NULL )
1122	{
1123	printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1124	__FUNCTION__ );
1125	hal_core_sleep();
1126	}
1127
1128	// 2. access boot device to initialize FATFS context
1129	fatfs_ctx_init( fatfs_ctx );
1130
1131	// 3. get various informations from FATFS context
1132	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1133	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1134	fatfs_ctx->sectors_per_cluster;
1135	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1136
1137	// 4. create VFS root inode in cluster 0
1138	error = vfs_inode_create( XPTR_NULL, // dentry_xp
1139	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	// register VFS root inode in process_zero descriptor of cluster 0
1175	process_zero.vfs_root_xp = vfs_root_inode_xp;
1176	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1177	}
1178
1179	/////////////////////////////////////////////////////////////////////////////////
1180	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1181	(info->x_size * info->y_size) );
1182	barrier_wait( &local_barrier , info->cores_nr );
1183	/////////////////////////////////////////////////////////////////////////////////
1184
1185	#if DEBUG_KERNEL_INIT
1186	if( (core_lid == 0) & (local_cxy == 0) )
1187	printk("\n[%s] : exit barrier 4 : VFS root initialized in cluster 0 / sr %x / cycle %d\n",
1188	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1189	#endif
1190
1191	/////////////////////////////////////////////////////////////////////////////////
1192	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1193	// and initialise both the local FS context and the local VFS context
1194	// from values stored in cluster 0.
1195	// They get the VFS root inode extended pointer from cluster 0.
1196	/////////////////////////////////////////////////////////////////////////////////
1197
1198	if( (core_lid == 0) && (local_cxy != 0) )
1199	{
1200	// File System must be FATFS in this implementation,
1201	// but other File System can be introduced here
1202	if( CONFIG_VFS_ROOT_IS_FATFS )
1203	{
1204	// 1. allocate memory for local FATFS context
1205	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1206
1207	// check memory
1208	if( local_fatfs_ctx == NULL )
1209	{
1210	printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1211	__FUNCTION__ , local_cxy );
1212	hal_core_sleep();
1213	}
1214
1215	// 2. get local pointer on VFS context for FATFS
1216	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1217
1218	// 3. get local pointer on FATFS context in cluster 0
1219	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1220
1221	// 4. copy FATFS context from cluster 0 to local cluster
1222	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1223	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1224
1225	// 5. copy VFS context from cluster 0 to local cluster
1226	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1227	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1228
1229	// 6. update extend field in local copy of VFS context
1230	vfs_ctx->extend = local_fatfs_ctx;
1231
1232	if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1233	{
1234	printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1235	__FUNCTION__ , local_cxy );
1236	hal_core_sleep();
1237	}
1238	}
1239
1240	// get extended pointer on VFS root inode from cluster 0
1241	vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1242
1243	// update local process_zero descriptor
1244	process_zero.vfs_root_xp = vfs_root_inode_xp;
1245	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1246	}
1247
1248	/////////////////////////////////////////////////////////////////////////////////
1249	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1250	(info->x_size * info->y_size) );
1251	barrier_wait( &local_barrier , info->cores_nr );
1252	/////////////////////////////////////////////////////////////////////////////////
1253
1254	#if DEBUG_KERNEL_INIT
1255	if( (core_lid == 0) & (local_cxy == 1) )
1256	printk("\n[%s] : exit barrier 5 : VFS root initialized in cluster 1 / sr %x / cycle %d\n",
1257	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1258	#endif
1259
1260	/////////////////////////////////////////////////////////////////////////////////
1261	// STEP 6 : CP0 in cluster 0 makes the global DEVFS tree initialisation:
1262	// It initializes the DEVFS context, and creates the DEVFS
1263	// "dev" and "external" inodes in cluster 0.
1264	/////////////////////////////////////////////////////////////////////////////////
1265
1266	if( (core_lid == 0) && (local_cxy == 0) )
1267	{
1268	// 1. allocate memory for DEVFS context extension in cluster 0
1269	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1270
1271	if( devfs_ctx == NULL )
1272	{
1273	printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1274	__FUNCTION__ , local_cxy );
1275	hal_core_sleep();
1276	}
1277
1278	// 2. initialize the DEVFS entry in the vfs_context[] array
1279	vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1280	0, // attributes: unused
1281	0, // total_clusters: unused
1282	0, // cluster_size: unused
1283	vfs_root_inode_xp, // VFS root
1284	devfs_ctx ); // extend
1285
1286	// 3. create "dev" and "external" inodes (directories)
1287	devfs_global_init( process_zero.vfs_root_xp,
1288	&devfs_dev_inode_xp,
1289	&devfs_external_inode_xp );
1290
1291	// 4. initializes DEVFS context extension
1292	devfs_ctx_init( devfs_ctx,
1293	devfs_dev_inode_xp,
1294	devfs_external_inode_xp );
1295	}
1296
1297	/////////////////////////////////////////////////////////////////////////////////
1298	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1299	(info->x_size * info->y_size) );
1300	barrier_wait( &local_barrier , info->cores_nr );
1301	/////////////////////////////////////////////////////////////////////////////////
1302
1303	#if DEBUG_KERNEL_INIT
1304	if( (core_lid == 0) & (local_cxy == 0) )
1305	printk("\n[%s] : exit barrier 6 : DEVFS root initialized in cluster 0 / sr %x / cycle %d\n",
1306	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1307	#endif
1308
1309	/////////////////////////////////////////////////////////////////////////////////
1310	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1311	// Each CP0 get the "dev" and "external" extended pointers from
1312	// values stored in cluster 0.
1313	// Then each CP0 in cluster(i) creates the DEVFS "internal" directory,
1314	// and creates the pseudo-files for all chdevs in cluster (i).
1315	/////////////////////////////////////////////////////////////////////////////////
1316
1317	if( core_lid == 0 )
1318	{
1319	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1320	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1321
1322	// get pointer on DEVFS context in cluster 0
1323	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1324
1325	devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1326	devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1327
1328	// populate DEVFS in all clusters
1329	devfs_local_init( devfs_dev_inode_xp,
1330	devfs_external_inode_xp,
1331	&devfs_internal_inode_xp );
1332	}
1333
1334	/////////////////////////////////////////////////////////////////////////////////
1335	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1336	(info->x_size * info->y_size) );
1337	barrier_wait( &local_barrier , info->cores_nr );
1338	/////////////////////////////////////////////////////////////////////////////////
1339
1340	#if DEBUG_KERNEL_INIT
1341	if( (core_lid == 0) & (local_cxy == 0) )
1342	printk("\n[%s] : exit barrier 7 : DEV initialized in cluster 0 / sr %x / cycle %d\n",
1343	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1344	#endif
1345
1346	/////////////////////////////////////////////////////////////////////////////////
1347	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1348	/////////////////////////////////////////////////////////////////////////////////
1349
1350	if( (core_lid == 0) && (local_cxy == 0) )
1351	{
1352
1353	#if( DEBUG_KERNEL_INIT & 1 )
1354	vfs_display( vfs_root_inode_xp );
1355	#endif
1356
1357	process_init_create();
1358	}
1359
1360	/////////////////////////////////////////////////////////////////////////////////
1361	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1362	(info->x_size * info->y_size) );
1363	barrier_wait( &local_barrier , info->cores_nr );
1364	/////////////////////////////////////////////////////////////////////////////////
1365
1366	#if DEBUG_KERNEL_INIT
1367	if( (core_lid == 0) & (local_cxy == 0) )
1368	printk("\n[%s] : exit barrier 8 : process init created / sr %x / cycle %d\n",
1369	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1370	#endif
1371
1372	#if (DEBUG_KERNEL_INIT & 1)
1373	if( (core_lid == 0) & (local_cxy == 0) )
1374	sched_display( 0 );
1375	#endif
1376
1377	/////////////////////////////////////////////////////////////////////////////////
1378	// STEP 9 : CP0 in cluster 0 print banner
1379	/////////////////////////////////////////////////////////////////////////////////
1380
1381	if( (core_lid == 0) && (local_cxy == 0) )
1382	{
1383	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1384
1385	#if( DEBUG_KERNEL_INIT & 1 )
1386	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1387	" - thread descriptor : %d bytes\n"
1388	" - process descriptor : %d bytes\n"
1389	" - cluster manager : %d bytes\n"
1390	" - chdev descriptor : %d bytes\n"
1391	" - core descriptor : %d bytes\n"
1392	" - scheduler : %d bytes\n"
1393	" - rpc fifo : %d bytes\n"
1394	" - page descriptor : %d bytes\n"
1395	" - mapper root : %d bytes\n"
1396	" - ppm manager : %d bytes\n"
1397	" - kcm manager : %d bytes\n"
1398	" - khm manager : %d bytes\n"
1399	" - vmm manager : %d bytes\n"
1400	" - gpt root : %d bytes\n"
1401	" - list item : %d bytes\n"
1402	" - xlist item : %d bytes\n"
1403	" - busylock : %d bytes\n"
1404	" - remote busylock : %d bytes\n"
1405	" - queuelock : %d bytes\n"
1406	" - remote queuelock : %d bytes\n"
1407	" - rwlock : %d bytes\n"
1408	" - remote rwlock : %d bytes\n",
1409	sizeof( thread_t ),
1410	sizeof( process_t ),
1411	sizeof( cluster_t ),
1412	sizeof( chdev_t ),
1413	sizeof( core_t ),
1414	sizeof( scheduler_t ),
1415	sizeof( remote_fifo_t ),
1416	sizeof( page_t ),
1417	sizeof( mapper_t ),
1418	sizeof( ppm_t ),
1419	sizeof( kcm_t ),
1420	sizeof( khm_t ),
1421	sizeof( vmm_t ),
1422	sizeof( gpt_t ),
1423	sizeof( list_entry_t ),
1424	sizeof( xlist_entry_t ),
1425	sizeof( busylock_t ),
1426	sizeof( remote_busylock_t ),
1427	sizeof( queuelock_t ),
1428	sizeof( remote_queuelock_t ),
1429	sizeof( rwlock_t ),
1430	sizeof( remote_rwlock_t ));
1431	#endif
1432
1433	}
1434
1435	// each core activates its private TICK IRQ
1436	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1437
1438	#if DEBUG_KERNEL_INIT
1439	printk("\n[%s] : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1440	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1441	#endif
1442
1443	// each core jump to thread_idle_func
1444	thread_idle_func();
1445	}
1446

Note: See TracBrowser for help on using the repository browser.

Download in other formats: