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kernel_init.c @ 490

Last change on this file since 490 was 490, checked in by viala@…, 6 years ago

Minor: Add extern prototype for kernel_init function.

Also I add documentation from where this function is called.

Gcc warning fixed:
`
kern/kernel_init.c: At top level:
kern/kernel_init.c:744:6: warning: no previous declaration for 'kernel_init'
[-Wmissing-declarations]

void kernel_init( boot_info_t * info )

File size: 53.4 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_ppm.h>
32	#include <barrier.h>
33	#include <remote_barrier.h>
34	#include <remote_fifo.h>
35	#include <core.h>
36	#include <list.h>
37	#include <xlist.h>
38	#include <xhtab.h>
39	#include <thread.h>
40	#include <scheduler.h>
41	#include <kmem.h>
42	#include <cluster.h>
43	#include <string.h>
44	#include <memcpy.h>
45	#include <ppm.h>
46	#include <page.h>
47	#include <chdev.h>
48	#include <boot_info.h>
49	#include <dqdt.h>
50	#include <dev_mmc.h>
51	#include <dev_dma.h>
52	#include <dev_iob.h>
53	#include <dev_ioc.h>
54	#include <dev_txt.h>
55	#include <dev_pic.h>
56	#include <printk.h>
57	#include <vfs.h>
58	#include <devfs.h>
59	#include <mapper.h>
60
61	///////////////////////////////////////////////////////////////////////////////////////////
62	// All the following global variables are replicated in all clusters.
63	// They are initialised by the kernel_init() function.
64	//
65	// WARNING : The section names have been defined to control the base addresses of the
66	// boot_info structure and the idle thread descriptors, through the kernel.ld script:
67	// - the boot_info structure is built by the bootloader, and used by kernel_init.
68	// it must be the first object in the kdata segment.
69	// - the array of idle threads descriptors must be placed on the first page boundary after
70	// the boot_info structure in the kdata segment.
71	///////////////////////////////////////////////////////////////////////////////////////////
72
73	// This variable defines the local boot_info structure
74	__attribute__((section(".kinfo")))
75	boot_info_t boot_info;
76
77	// This variable defines the "idle" threads descriptors array
78	__attribute__((section(".kidle")))
79	char idle_threads[CONFIG_THREAD_DESC_SIZE *
80	CONFIG_MAX_LOCAL_CORES] CONFIG_PPM_PAGE_ALIGNED;
81
82	// This variable defines the local cluster manager
83	__attribute__((section(".kdata")))
84	cluster_t cluster_manager CONFIG_CACHE_LINE_ALIGNED;
85
86	// This variable defines the TXT0 kernel terminal (TX only)
87	__attribute__((section(".kdata")))
88	chdev_t txt0_chdev CONFIG_CACHE_LINE_ALIGNED;
89
90	// This variables define the kernel process0 descriptor
91	__attribute__((section(".kdata")))
92	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
93
94	// This variable defines extended pointers on the distributed chdevs
95	__attribute__((section(".kdata")))
96	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
97
98	// This variable contains the input IRQ indexes for the IOPIC controller
99	__attribute__((section(".kdata")))
100	iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
101
102	// This variable contains the input IRQ indexes for the LAPIC controller
103	__attribute__((section(".kdata")))
104	lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
105
106	// This variable defines the local cluster identifier
107	__attribute__((section(".kdata")))
108	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
109
110	// This variable is used for CP0 cores synchronisation in kernel_init()
111	__attribute__((section(".kdata")))
112	remote_barrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
113
114	// This variable is used for local cores synchronisation in kernel_init()
115	__attribute__((section(".kdata")))
116	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
117
118	// This variable defines the array of supported File System contexts
119	__attribute__((section(".kdata")))
120	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
121
122	// kernel_init is the entry point defined in hal/tsar_mips32/kernel.ld
123	// It will be used by the bootloader.
124	extern void kernel_init( boot_info_t * info );
125
126	// these debug variables are used to analyse the sys_read() syscall timing
127
128	#if DEBUG_SYS_READ
129	uint32_t enter_sys_read;
130	uint32_t exit_sys_read;
131
132	uint32_t enter_devfs_read;
133	uint32_t exit_devfs_read;
134
135	uint32_t enter_txt_read;
136	uint32_t exit_txt_read;
137
138	uint32_t enter_chdev_cmd_read;
139	uint32_t exit_chdev_cmd_read;
140
141	uint32_t enter_chdev_server_read;
142	uint32_t exit_chdev_server_read;
143
144	uint32_t enter_tty_cmd_read;
145	uint32_t exit_tty_cmd_read;
146
147	uint32_t enter_tty_isr_read;
148	uint32_t exit_tty_isr_read;
149	#endif
150
151	// these debug variables are used to analyse the sys_write() syscall timing
152
153	#if DEBUG_SYS_WRITE
154	uint32_t enter_sys_write;
155	uint32_t exit_sys_write;
156
157	uint32_t enter_devfs_write;
158	uint32_t exit_devfs_write;
159
160	uint32_t enter_txt_write;
161	uint32_t exit_txt_write;
162
163	uint32_t enter_chdev_cmd_write;
164	uint32_t exit_chdev_cmd_write;
165
166	uint32_t enter_chdev_server_write;
167	uint32_t exit_chdev_server_write;
168
169	uint32_t enter_tty_cmd_write;
170	uint32_t exit_tty_cmd_write;
171
172	uint32_t enter_tty_isr_write;
173	uint32_t exit_tty_isr_write;
174	#endif
175
176	///////////////////////////////////////////////////////////////////////////////////////////
177	// This function displays the ALMOS_MKH banner.
178	///////////////////////////////////////////////////////////////////////////////////////////
179	static void print_banner( uint32_t nclusters , uint32_t ncores )
180	{
181	printk("\n"
182	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
183	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
184	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
185	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
186	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
187	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
188	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
189	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
190	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
191	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
192	CONFIG_ALMOS_VERSION , nclusters , ncores );
193	}
194
195
196	///////////////////////////////////////////////////////////////////////////////////////////
197	// This function initializes the TXT0 chdev descriptor, that is the "kernel terminal",
198	// shared by all kernel instances for debug messages.
199	// It is a global variable (replicated in all clusters), because this terminal is used
200	// before the kmem allocator initialisation, but only the instance in cluster containing
201	// the calling core is registered in the "chdev_dir" directory.
202	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
203	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
204	///////////////////////////////////////////////////////////////////////////////////////////
205	// @ info : pointer on the local boot-info structure.
206	///////////////////////////////////////////////////////////////////////////////////////////
207	static void txt0_device_init( boot_info_t * info )
208	{
209	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
210	uint32_t dev_nr; // actual number of devices in this cluster
211	xptr_t base; // remote pointer on segment base
212	uint32_t func; // device functional index
213	uint32_t impl; // device implementation index
214	uint32_t i; // device index in dev_tbl
215	uint32_t x; // X cluster coordinate
216	uint32_t y; // Y cluster coordinate
217	uint32_t channels; // number of channels
218
219	// get number of peripherals and base of devices array from boot_info
220	dev_nr = info->ext_dev_nr;
221	dev_tbl = info->ext_dev;
222
223	// loop on external peripherals to find TXT device
224	for( i = 0 ; i < dev_nr ; i++ )
225	{
226	base = dev_tbl[i].base;
227	func = FUNC_FROM_TYPE( dev_tbl[i].type );
228	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
229	channels = dev_tbl[i].channels;
230
231	if (func == DEV_FUNC_TXT )
232	{
233	assert( (channels > 0) , __FUNCTION__ , "number of TXT channels cannot be 0\n");
234
235	// initializes TXT_TX[0] chdev
236	txt0_chdev.func = func;
237	txt0_chdev.impl = impl;
238	txt0_chdev.channel = 0;
239	txt0_chdev.base = base;
240	txt0_chdev.is_rx = false;
241
242	// initializes lock
243	remote_spinlock_init( XPTR( local_cxy , &txt0_chdev.wait_lock ) );
244
245	// TXT specific initialisation:
246	// no server thread & no IRQ routing for channel 0
247	dev_txt_init( &txt0_chdev );
248
249	// register the TXT0 in all chdev_dir[x][y] structures
250	for( x = 0 ; x < info->x_size ; x++ )
251	{
252	for( y = 0 ; y < info->y_size ; y++ )
253	{
254	cxy_t cxy = (x<<info->y_width) + y;
255	hal_remote_swd( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
256	XPTR( local_cxy , &txt0_chdev ) );
257	}
258	}
259	}
260	} // end loop on devices
261	} // end txt0_device_init()
262
263	///////////////////////////////////////////////////////////////////////////////////////////
264	// This function allocates memory and initializes the chdev descriptors for the internal
265	// peripherals contained in the local cluster, other than the LAPIC, as specified by
266	// the boot_info, including the linking with the driver for the specified implementation.
267	// The relevant entries in all copies of the devices directory are initialised.
268	///////////////////////////////////////////////////////////////////////////////////////////
269	// @ info : pointer on the local boot-info structure.
270	///////////////////////////////////////////////////////////////////////////////////////////
271	static void internal_devices_init( boot_info_t * info )
272	{
273	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
274	uint32_t dev_nr; // actual number of devices in this cluster
275	xptr_t base; // remote pointer on segment base
276	uint32_t func; // device functionnal index
277	uint32_t impl; // device implementation index
278	uint32_t i; // device index in dev_tbl
279	uint32_t x; // X cluster coordinate
280	uint32_t y; // Y cluster coordinate
281	uint32_t channels; // number of channels
282	uint32_t channel; // channel index
283	chdev_t * chdev_ptr; // local pointer on created chdev
284
285	// get number of internal peripherals and base from boot_info
286	dev_nr = info->int_dev_nr;
287	dev_tbl = info->int_dev;
288
289	// loop on internal peripherals
290	for( i = 0 ; i < dev_nr ; i++ )
291	{
292	base = dev_tbl[i].base;
293	channels = dev_tbl[i].channels;
294	func = FUNC_FROM_TYPE( dev_tbl[i].type );
295	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
296
297	//////////////////////////
298	if( func == DEV_FUNC_MMC )
299	{
300	assert( (channels == 1) , __FUNCTION__ ,
301	"MMC device must be single channel\n" );
302
303	// create chdev in local cluster
304	chdev_ptr = chdev_create( func,
305	impl,
306	0, // channel
307	false, // direction
308	base );
309
310	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
311	"cannot allocate memory for MMC chdev\n" );
312
313	// make MMC specific initialisation
314	dev_mmc_init( chdev_ptr );
315
316	// set the MMC field in all chdev_dir[x][y] structures
317	for( x = 0 ; x < info->x_size ; x++ )
318	{
319	for( y = 0 ; y < info->y_size ; y++ )
320	{
321	cxy_t cxy = (x<<info->y_width) + y;
322	hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
323	XPTR( local_cxy , chdev_ptr ) );
324	}
325	}
326
327	#if( DEBUG_KERNEL_INIT & 0x1 )
328	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
329	printk("\n[DBG] %s : created MMC in cluster %x / chdev = %x\n",
330	__FUNCTION__ , local_cxy , chdev_ptr );
331	#endif
332	}
333	///////////////////////////////
334	else if( func == DEV_FUNC_DMA )
335	{
336	// create one chdev per channel in local cluster
337	for( channel = 0 ; channel < channels ; channel++ )
338	{
339	// create chdev[channel] in local cluster
340	chdev_ptr = chdev_create( func,
341	impl,
342	channel,
343	false, // direction
344	base );
345
346	assert( (chdev_ptr != NULL) , __FUNCTION__ ,
347	"cannot allocate memory for DMA chdev" );
348
349	// make DMA specific initialisation
350	dev_dma_init( chdev_ptr );
351
352	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
353	// structure because the DMA device is not remotely accessible.
354	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
355
356	#if( DEBUG_KERNEL_INIT & 0x1 )
357	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
358	printk("\n[DBG] %s : created DMA[%d] in cluster %x / chdev = %x\n",
359	__FUNCTION__ , channel , local_cxy , chdev_ptr );
360	#endif
361	}
362	}
363	}
364	} // end internal_devices_init()
365
366	///////////////////////////////////////////////////////////////////////////////////////////
367	// This function allocates memory and initializes the chdev descriptors for the
368	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
369	// This includes the dynamic linking with the driver for the specified implementation.
370	// These chdev descriptors are distributed on all clusters, using a modulo on a global
371	// index, identically computed in all clusters.
372	// This function is executed in all clusters by the CP0 core, that computes a global index
373	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
374	// the local cluster, because the global index matches the local index.
375	// The relevant entries in all copies of the devices directory are initialised.
376	///////////////////////////////////////////////////////////////////////////////////////////
377	// @ info : pointer on the local boot-info structure.
378	///////////////////////////////////////////////////////////////////////////////////////////
379	static void external_devices_init( boot_info_t * info )
380	{
381	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
382	uint32_t dev_nr; // actual number of external devices
383	xptr_t base; // remote pointer on segment base
384	uint32_t func; // device functionnal index
385	uint32_t impl; // device implementation index
386	uint32_t i; // device index in dev_tbl
387	uint32_t x; // X cluster coordinate
388	uint32_t y; // Y cluster coordinate
389	uint32_t channels; // number of channels
390	uint32_t channel; // channel index
391	uint32_t directions; // number of directions (1 or 2)
392	uint32_t rx; // direction index (0 or 1)
393	chdev_t * chdev; // local pointer on one channel_device descriptor
394	uint32_t ext_chdev_gid; // global index of external chdev
395
396	// get number of peripherals and base of devices array from boot_info
397	dev_nr = info->ext_dev_nr;
398	dev_tbl = info->ext_dev;
399
400	// initializes global index (PIC is already placed in cluster 0
401	ext_chdev_gid = 1;
402
403	// loop on external peripherals
404	for( i = 0 ; i < dev_nr ; i++ )
405	{
406	base = dev_tbl[i].base;
407	channels = dev_tbl[i].channels;
408	func = FUNC_FROM_TYPE( dev_tbl[i].type );
409	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
410
411	// There is one chdev per direction for NIC and for TXT
412	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
413	else directions = 1;
414
415	// do nothing for ROM, that does not require a device descriptor.
416	if( func == DEV_FUNC_ROM ) continue;
417
418	// do nothing for PIC, that is already initialized
419	if( func == DEV_FUNC_PIC ) continue;
420
421	// check PIC device initialized
422	assert( (chdev_dir.pic != XPTR_NULL ) , __FUNCTION__ ,
423	"PIC device must be initialized before other devices\n" );
424
425	// check external device functionnal type
426	assert( ( (func == DEV_FUNC_IOB) \|\|
427	(func == DEV_FUNC_IOC) \|\|
428	(func == DEV_FUNC_TXT) \|\|
429	(func == DEV_FUNC_NIC) \|\|
430	(func == DEV_FUNC_FBF) ) , __FUNCTION__ ,
431	"undefined external peripheral type\n" );
432
433	// loops on channels
434	for( channel = 0 ; channel < channels ; channel++ )
435	{
436	// loop on directions
437	for( rx = 0 ; rx < directions ; rx++ )
438	{
439	// skip TXT_TX[0] chdev that has already been created & registered
440	if( (func == DEV_FUNC_TXT) && (channel == 0) && (rx == 0) ) continue;
441
442	// compute target cluster for chdev[func,channel,direction]
443	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
444	uint32_t cx = offset / info->y_size;
445	uint32_t cy = offset % info->y_size;
446	uint32_t target_cxy = (cx<<info->y_width) + cy;
447
448	// allocate and initialize a local chdev
449	// when local cluster matches target cluster
450	if( target_cxy == local_cxy )
451	{
452	chdev = chdev_create( func,
453	impl,
454	channel,
455	rx, // direction
456	base );
457
458	assert( (chdev != NULL), __FUNCTION__ ,
459	"cannot allocate external device" );
460
461	// make device type specific initialisation
462	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
463	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
464	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
465	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
466	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
467
468	// all external (shared) devices are remotely accessible
469	// initialize the replicated chdev_dir[x][y] structures
470	// defining the extended pointers on chdev descriptors
471	xptr_t * entry;
472
473	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
474	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
475	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
476	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
477	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
478	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
479	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
480
481	for( x = 0 ; x < info->x_size ; x++ )
482	{
483	for( y = 0 ; y < info->y_size ; y++ )
484	{
485	cxy_t cxy = (x<<info->y_width) + y;
486	hal_remote_swd( XPTR( cxy , entry ),
487	XPTR( local_cxy , chdev ) );
488	}
489	}
490
491	#if( DEBUG_KERNEL_INIT & 0x1 )
492	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
493	printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
494	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
495	#endif
496	} // end if match
497
498	// increment chdev global index (matching or not)
499	ext_chdev_gid++;
500
501	} // end loop on directions
502	} // end loop on channels
503	} // end loop on devices
504	} // end external_devices_init()
505
506	///////////////////////////////////////////////////////////////////////////////////////////
507	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
508	// device, namely the informations attached to the external IOPIC controller, that
509	// must be replicated in all clusters (struct iopic_input).
510	// This initialisation must be done before other devices initialisation because the IRQ
511	// routing infrastructure is required for both internal and external devices init.
512	///////////////////////////////////////////////////////////////////////////////////////////
513	// @ info : pointer on the local boot-info structure.
514	///////////////////////////////////////////////////////////////////////////////////////////
515	static void iopic_init( boot_info_t * info )
516	{
517	boot_device_t * dev_tbl; // pointer on boot_info external devices array
518	uint32_t dev_nr; // actual number of external devices
519	xptr_t base; // remote pointer on segment base
520	uint32_t func; // device functionnal index
521	uint32_t impl; // device implementation index
522	uint32_t i; // device index in dev_tbl
523	uint32_t x; // cluster X coordinate
524	uint32_t y; // cluster Y coordinate
525	bool_t found; // IOPIC found
526	chdev_t * chdev; // pointer on PIC chdev descriptor
527
528	// get number of external peripherals and base of array from boot_info
529	dev_nr = info->ext_dev_nr;
530	dev_tbl = info->ext_dev;
531
532	// loop on external peripherals to get the IOPIC
533	for( i = 0 , found = false ; i < dev_nr ; i++ )
534	{
535	func = FUNC_FROM_TYPE( dev_tbl[i].type );
536
537	if( func == DEV_FUNC_PIC )
538	{
539	base = dev_tbl[i].base;
540	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
541	found = true;
542	break;
543	}
544	}
545
546	assert( found , __FUNCTION__ , "PIC device not found\n" );
547
548	// allocate and initialize the PIC chdev in cluster 0
549	chdev = chdev_create( DEV_FUNC_PIC,
550	impl,
551	0, // channel
552	0, // direction,
553	base );
554
555	assert( (chdev != NULL), __FUNCTION__ , "no memory for PIC chdev\n" );
556
557	// make PIC device type specific initialisation
558	dev_pic_init( chdev );
559
560	// register, in all clusters, the extended pointer
561	// on PIC chdev in "chdev_dir" array
562	xptr_t * entry = &chdev_dir.pic;
563
564	for( x = 0 ; x < info->x_size ; x++ )
565	{
566	for( y = 0 ; y < info->y_size ; y++ )
567	{
568	cxy_t cxy = (x<<info->y_width) + y;
569	hal_remote_swd( XPTR( cxy , entry ) ,
570	XPTR( local_cxy , chdev ) );
571	}
572	}
573
574	// initialize, in all clusters, the "iopic_input" structure
575	// defining how external IRQs are connected to IOPIC
576
577	// register default value for unused inputs
578	for( x = 0 ; x < info->x_size ; x++ )
579	{
580	for( y = 0 ; y < info->y_size ; y++ )
581	{
582	cxy_t cxy = (x<<info->y_width) + y;
583	hal_remote_memset( XPTR( cxy , &iopic_input ) , 0xFF , sizeof(iopic_input_t) );
584	}
585	}
586
587	// register input IRQ index for valid inputs
588	uint32_t id; // input IRQ index
589	uint8_t valid; // input IRQ is connected
590	uint32_t type; // source device type
591	uint8_t channel; // source device channel
592	uint8_t is_rx; // source device direction
593	uint32_t * ptr; // local pointer on one field in iopic_input stucture
594
595	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
596	{
597	valid = dev_tbl[i].irq[id].valid;
598	type = dev_tbl[i].irq[id].dev_type;
599	channel = dev_tbl[i].irq[id].channel;
600	is_rx = dev_tbl[i].irq[id].is_rx;
601	func = FUNC_FROM_TYPE( type );
602
603	// get pointer on relevant field in iopic_input
604	if( valid )
605	{
606	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
607	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
608	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
609	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
610	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
611	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
612	else assert( false , __FUNCTION__ , "illegal source device for IOPIC input" );
613
614	// set one entry in all "iopic_input" structures
615	for( x = 0 ; x < info->x_size ; x++ )
616	{
617	for( y = 0 ; y < info->y_size ; y++ )
618	{
619	cxy_t cxy = (x<<info->y_width) + y;
620	hal_remote_swd( XPTR( cxy , ptr ) , id );
621	}
622	}
623	}
624	}
625
626	#if( DEBUG_KERNEL_INIT & 0x1 )
627	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
628	{
629	printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
630	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
631	dev_pic_inputs_display();
632	}
633	#endif
634
635	} // end iopic_init()
636
637	///////////////////////////////////////////////////////////////////////////////////////////
638	// This function is called by all CP0s in all cluster to complete the PIC device
639	// initialisation, namely the informations attached to the LAPIC controller.
640	// This initialisation must be done after the IOPIC initialisation, but before other
641	// devices initialisation because the IRQ routing infrastructure is required for both
642	// internal and external devices initialisation.
643	///////////////////////////////////////////////////////////////////////////////////////////
644	// @ info : pointer on the local boot-info structure.
645	///////////////////////////////////////////////////////////////////////////////////////////
646	static void lapic_init( boot_info_t * info )
647	{
648	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
649	uint32_t dev_nr; // number of internal devices
650	uint32_t i; // device index in dev_tbl
651	xptr_t base; // remote pointer on segment base
652	uint32_t func; // device functionnal type in boot_info
653	bool_t found; // LAPIC found
654
655	// get number of internal peripherals and base
656	dev_nr = info->int_dev_nr;
657	dev_tbl = info->int_dev;
658
659	// loop on internal peripherals to get the lapic device
660	for( i = 0 , found = false ; i < dev_nr ; i++ )
661	{
662	func = FUNC_FROM_TYPE( dev_tbl[i].type );
663
664	if( func == DEV_FUNC_ICU )
665	{
666	base = dev_tbl[i].base;
667	found = true;
668	break;
669	}
670	}
671
672	// if the LAPIC controller is not defined in the boot_info,
673	// we simply don't initialize the PIC extensions in the kernel,
674	// making the assumption that the LAPIC related informations
675	// are hidden in the hardware specific PIC driver.
676	if( found )
677	{
678	// initialise the PIC extensions for
679	// the core descriptor and core manager extensions
680	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
681
682	// initialize the "lapic_input" structure
683	// defining how internal IRQs are connected to LAPIC
684	uint32_t id;
685	uint8_t valid;
686	uint8_t channel;
687	uint32_t func;
688
689	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
690	{
691	valid = dev_tbl[i].irq[id].valid;
692	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
693	channel = dev_tbl[i].irq[id].channel;
694
695	if( valid ) // only valid local IRQs are registered
696	{
697	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
698	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
699	else assert( false , __FUNCTION__ , "illegal source device for LAPIC input" );
700	}
701	}
702	}
703	} // end lapic_init()
704
705	///////////////////////////////////////////////////////////////////////////////////////////
706	// This static function returns the identifiers of the calling core.
707	///////////////////////////////////////////////////////////////////////////////////////////
708	// @ info : pointer on boot_info structure.
709	// @ lid : [out] core local index in cluster.
710	// @ cxy : [out] cluster identifier.
711	// @ lid : [out] core global identifier (hardware).
712	// @ return 0 if success / return EINVAL if not found.
713	///////////////////////////////////////////////////////////////////////////////////////////
714	static error_t get_core_identifiers( boot_info_t * info,
715	lid_t * lid,
716	cxy_t * cxy,
717	gid_t * gid )
718	{
719	uint32_t i;
720	gid_t global_id;
721
722	// get global identifier from hardware register
723	global_id = hal_get_gid();
724
725	// makes an associative search in boot_info to get (cxy,lid) from global_id
726	for( i = 0 ; i < info->cores_nr ; i++ )
727	{
728	if( global_id == info->core[i].gid )
729	{
730	*lid = info->core[i].lid;
731	*cxy = info->core[i].cxy;
732	*gid = global_id;
733	return 0;
734	}
735	}
736	return EINVAL;
737	}
738
739	///////////////////////////////////////////////////////////////////////////////////////////
740	// This function is the entry point for the kernel initialisation.
741	// It is executed by all cores in all clusters, but only core[0], called CP0,
742	// initializes the shared resources such as the cluster manager, or the local peripherals.
743	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
744	// only information contained in the local boot_info_t structure, set by the bootloader.
745	// Only CP0 in cluster 0 print the log messages.
746	///////////////////////////////////////////////////////////////////////////////////////////
747	// @ info : pointer on the local boot-info structure.
748	///////////////////////////////////////////////////////////////////////////////////////////
749	void kernel_init( boot_info_t * info )
750	{
751	lid_t core_lid = -1; // running core local index
752	cxy_t core_cxy = -1; // running core cluster identifier
753	gid_t core_gid; // running core hardware identifier
754	cluster_t * cluster; // pointer on local cluster manager
755	core_t * core; // pointer on running core descriptor
756	thread_t * thread; // pointer on idle thread descriptor
757
758	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
759	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
760	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
761	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
762
763	error_t error;
764	reg_t status; // running core status register
765
766	/////////////////////////////////////////////////////////////////////////////////
767	// STEP 0 : Each core get its core identifier from boot_info, and makes
768	// a partial initialisation of its private idle thread descriptor.
769	// CP0 initializes the "local_cxy" global variable.
770	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
771	/////////////////////////////////////////////////////////////////////////////////
772
773	error = get_core_identifiers( info,
774	&core_lid,
775	&core_cxy,
776	&core_gid );
777
778	// CP0 initializes cluster identifier
779	if( core_lid == 0 ) local_cxy = info->cxy;
780
781	// each core gets a pointer on its private idle thread descriptor
782	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
783
784	// each core registers this thread pointer in hardware register
785	hal_set_current_thread( thread );
786
787	// each core register core descriptor pointer in idle thread descriptor
788	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
789
790	// each core initializes the idle thread lists of locks
791	list_root_init( &thread->locks_root );
792	xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) );
793	thread->local_locks = 0;
794	thread->remote_locks = 0;
795
796	// CP0 in cluster 0 initialises TXT0 chdev descriptor
797	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
798
799	/////////////////////////////////////////////////////////////////////////////////
800	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
801	(info->x_size * info->y_size) );
802	barrier_wait( &local_barrier , info->cores_nr );
803	/////////////////////////////////////////////////////////////////////////////////
804
805	#if DEBUG_KERNEL_INIT
806	if( (core_lid == 0) & (local_cxy == 0) )
807	printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / cycle %d\n",
808	__FUNCTION__, (uint32_t)hal_get_cycles() );
809	#endif
810
811	/////////////////////////////////////////////////////////////////////////////
812	// STEP 1 : all cores check core identifier.
813	// CP0 initializes the local cluster manager.
814	// This includes the memory allocators.
815	/////////////////////////////////////////////////////////////////////////////
816
817	// all cores check identifiers
818	if( error )
819	{
820	assert( false , __FUNCTION__ ,
821	"illegal core identifiers gid = %x / cxy = %x / lid = %d",
822	core_lid , core_cxy , core_lid );
823	}
824
825	// CP0 initializes cluster manager
826	if( core_lid == 0 )
827	{
828	error = cluster_init( info );
829
830	if( error )
831	{
832	assert( false , __FUNCTION__ ,
833	"cannot initialise cluster %x", local_cxy );
834	}
835	}
836
837	/////////////////////////////////////////////////////////////////////////////////
838	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
839	(info->x_size * info->y_size) );
840	barrier_wait( &local_barrier , info->cores_nr );
841	/////////////////////////////////////////////////////////////////////////////////
842
843	#if DEBUG_KERNEL_INIT
844	if( (core_lid == 0) & (local_cxy == 0) )
845	printk("\n[DBG] %s : exit barrier 1 : clusters initialised / cycle %d\n",
846	__FUNCTION__, (uint32_t)hal_get_cycles() );
847	#endif
848
849	/////////////////////////////////////////////////////////////////////////////////
850	// STEP 2 : CP0 initializes the process_zero descriptor.
851	// CP0 in cluster 0 initializes the IOPIC device.
852	/////////////////////////////////////////////////////////////////////////////////
853
854	// all cores get pointer on local cluster manager & core descriptor
855	cluster = &cluster_manager;
856	core = &cluster->core_tbl[core_lid];
857
858	// all CP0s initialize the process_zero descriptor
859	if( core_lid == 0 ) process_zero_create( &process_zero );
860
861	// CP0 in cluster 0 initializes the PIC chdev,
862	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
863
864	////////////////////////////////////////////////////////////////////////////////
865	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
866	(info->x_size * info->y_size) );
867	barrier_wait( &local_barrier , info->cores_nr );
868	////////////////////////////////////////////////////////////////////////////////
869
870	#if DEBUG_KERNEL_INIT
871	if( (core_lid == 0) & (local_cxy == 0) )
872	printk("\n[DBG] %s : exit barrier 2 : PIC initialised / cycle %d\n",
873	__FUNCTION__, (uint32_t)hal_get_cycles() );
874	#endif
875
876	////////////////////////////////////////////////////////////////////////////////
877	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
878	// CP0 initializes the internal chdev descriptors
879	// CP0 initialize the local external chdev descriptors
880	////////////////////////////////////////////////////////////////////////////////
881
882	// all CP0s initialize their local LAPIC extension,
883	if( core_lid == 0 ) lapic_init( info );
884
885	// CP0 scan the internal (private) peripherals,
886	// and allocates memory for the corresponding chdev descriptors.
887	if( core_lid == 0 ) internal_devices_init( info );
888
889
890	// All CP0s contribute to initialise external peripheral chdev descriptors.
891	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
892	// and allocates memory for the chdev descriptors that must be placed
893	// on the (cxy) cluster according to the global index value.
894
895	if( core_lid == 0 ) external_devices_init( info );
896
897	/////////////////////////////////////////////////////////////////////////////////
898	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
899	(info->x_size * info->y_size) );
900	barrier_wait( &local_barrier , info->cores_nr );
901	/////////////////////////////////////////////////////////////////////////////////
902
903	#if DEBUG_KERNEL_INIT
904	if( (core_lid == 0) & (local_cxy == 0) )
905	printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / cycle %d\n",
906	__FUNCTION__, (uint32_t)hal_get_cycles() );
907	#endif
908
909	#if( DEBUG_KERNEL_INIT & 1 )
910	if( (core_lid == 0) & (local_cxy == 0) )
911	chdev_dir_display();
912	#endif
913
914	/////////////////////////////////////////////////////////////////////////////////
915	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
916	// Alh cores initialize IDLE thread.
917	// Only CP0 in cluster 0 creates the VFS root inode.
918	// It access the boot device to initialize the file system context.
919	/////////////////////////////////////////////////////////////////////////////////
920
921	// All cores enable the shared IPI channel
922	dev_pic_enable_ipi();
923	hal_enable_irq( &status );
924
925	// all cores initialize the idle thread descriptor
926	thread_idle_init( thread,
927	THREAD_IDLE,
928	&thread_idle_func,
929	NULL,
930	core_lid );
931
932	// all cores unblock idle thread, and register it in scheduler
933	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
934	core->scheduler.idle = thread;
935
936	#if( DEBUG_KERNEL_INIT & 1 )
937	sched_display( core_lid );
938	#endif
939
940	// CPO in cluster 0 creates the VFS root
941	if( (core_lid == 0) && (local_cxy == 0 ) )
942	{
943	vfs_root_inode_xp = XPTR_NULL;
944
945	// File System must be FATFS in this implementation,
946	// but other File System can be introduced here
947	if( CONFIG_VFS_ROOT_IS_FATFS )
948	{
949	// 1. allocate memory for FATFS context in cluster 0
950	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
951
952	assert( (fatfs_ctx != NULL) , __FUNCTION__ ,
953	"cannot create FATFS context in cluster 0\n" );
954
955	// 2. access boot device to initialize FATFS context
956	fatfs_ctx_init( fatfs_ctx );
957
958	// 3. get various informations from FATFS context
959	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
960	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
961	fatfs_ctx->sectors_per_cluster;
962	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
963
964	// 4. create VFS root inode in cluster 0
965	error = vfs_inode_create( XPTR_NULL, // dentry_xp
966	FS_TYPE_FATFS, // fs_type
967	INODE_TYPE_DIR, // inode_type
968	(void *)(intptr_t)root_dir_cluster, // extend
969	0, // attr
970	0, // rights
971	0, // uid
972	0, // gid
973	&vfs_root_inode_xp ); // return
974
975	assert( (error == 0) , __FUNCTION__ ,
976	"cannot create VFS root inode\n" );
977
978	// 5. initialize VFS context for FAT in cluster 0
979	vfs_ctx_init( FS_TYPE_FATFS, // file system type
980	0, // attributes
981	total_clusters,
982	cluster_size,
983	vfs_root_inode_xp, // VFS root
984	fatfs_ctx ); // extend
985
986	// 6. check initialisation
987	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
988	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
989	__FUNCTION__ , "illegal value for FATFS context in cluster %x\n", local_cxy );
990	}
991	else
992	{
993	assert( false , __FUNCTION__ ,
994	"root FS must be FATFS" );
995	}
996
997	// register VFS root inode in process_zero descriptor of cluster 0
998	process_zero.vfs_root_xp = vfs_root_inode_xp;
999	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1000	}
1001
1002	/////////////////////////////////////////////////////////////////////////////////
1003	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1004	(info->x_size * info->y_size) );
1005	barrier_wait( &local_barrier , info->cores_nr );
1006	/////////////////////////////////////////////////////////////////////////////////
1007
1008	#if DEBUG_KERNEL_INIT
1009	if( (core_lid == 0) & (local_cxy == 0) )
1010	printk("\n[DBG] %s : exit barrier 4 : VFS_root = %l in cluster 0 / cycle %d\n",
1011	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1012	#endif
1013
1014	/////////////////////////////////////////////////////////////////////////////////
1015	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1016	// and initialise both the local FS context and the local VFS context
1017	// from values stored in cluster 0.
1018	// They get the VFS root inode extended pointer from cluster 0.
1019	/////////////////////////////////////////////////////////////////////////////////
1020
1021	if( (core_lid == 0) && (local_cxy != 0) )
1022	{
1023	// File System must be FATFS in this implementation,
1024	// but other File System can be introduced here
1025	if( CONFIG_VFS_ROOT_IS_FATFS )
1026	{
1027	// 1. allocate memory for local FATFS context
1028	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1029
1030	assert( (local_fatfs_ctx != NULL) , __FUNCTION__ ,
1031	"cannot create FATFS context in cluster %x\n", local_cxy );
1032
1033	// 2. get local pointer on VFS context for FATFS
1034	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1035
1036	// 3. get local pointer on FATFS context in cluster 0
1037	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1038
1039	// 4. copy FATFS context from cluster 0 to local cluster
1040	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1041	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1042
1043	// 5. copy VFS context from cluster 0 to local cluster
1044	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1045	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1046
1047	// 6. update extend field in local copy of VFS context
1048	vfs_ctx->extend = local_fatfs_ctx;
1049
1050	// 7. check initialisation
1051	assert( (((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster == 8),
1052	__FUNCTION__ , "illegal value for FATFS context in cluster %x\n", local_cxy );
1053	}
1054
1055	// get extended pointer on VFS root inode from cluster 0
1056	vfs_root_inode_xp = hal_remote_lwd( XPTR( 0 , &process_zero.vfs_root_xp ) );
1057
1058	// update local process_zero descriptor
1059	process_zero.vfs_root_xp = vfs_root_inode_xp;
1060	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1061	}
1062
1063	/////////////////////////////////////////////////////////////////////////////////
1064	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1065	(info->x_size * info->y_size) );
1066	barrier_wait( &local_barrier , info->cores_nr );
1067	/////////////////////////////////////////////////////////////////////////////////
1068
1069	#if DEBUG_KERNEL_INIT
1070	if( (core_lid == 0) & (local_cxy == 0) )
1071	printk("\n[DBG] %s : exit barrier 5 : VFS_root = %l in cluster 0 / cycle %d\n",
1072	__FUNCTION__, vfs_root_inode_xp , (uint32_t)hal_get_cycles());
1073	#endif
1074
1075	/////////////////////////////////////////////////////////////////////////////////
1076	// STEP 6 : CP0 in cluster IO makes the global DEVFS tree initialisation:
1077	// It creates the DEVFS directory "dev", and the DEVFS "external"
1078	// directory in cluster IO and mount these inodes into VFS.
1079	/////////////////////////////////////////////////////////////////////////////////
1080
1081	if( (core_lid == 0) && (local_cxy == 0) )
1082	{
1083	// create "dev" and "external" directories.
1084	devfs_global_init( process_zero.vfs_root_xp,
1085	&devfs_dev_inode_xp,
1086	&devfs_external_inode_xp );
1087
1088	// creates the DEVFS context in cluster IO
1089	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1090
1091	assert( (devfs_ctx != NULL) , __FUNCTION__ ,
1092	"cannot create DEVFS context in cluster IO\n");
1093
1094	// register DEVFS root and external directories
1095	devfs_ctx_init( devfs_ctx, devfs_dev_inode_xp, devfs_external_inode_xp );
1096	}
1097
1098	/////////////////////////////////////////////////////////////////////////////////
1099	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1100	(info->x_size * info->y_size) );
1101	barrier_wait( &local_barrier , info->cores_nr );
1102	/////////////////////////////////////////////////////////////////////////////////
1103
1104	#if DEBUG_KERNEL_INIT
1105	if( (core_lid == 0) & (local_cxy == 0) )
1106	printk("\n[DBG] %s : exit barrier 6 : dev_root = %l in cluster 0 / cycle %d\n",
1107	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1108	#endif
1109
1110	/////////////////////////////////////////////////////////////////////////////////
1111	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1112	// Each CP0 get the "dev" and "external" extended pointers from
1113	// values stored in cluster IO.
1114	// Then each CP0 in cluster(i) creates the DEVFS "internal directory,
1115	// and creates the pseudo-files for all chdevs in cluster (i).
1116	/////////////////////////////////////////////////////////////////////////////////
1117
1118	if( core_lid == 0 )
1119	{
1120	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1121	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1122
1123	// get pointer on DEVFS context in cluster 0
1124	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1125
1126	devfs_dev_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1127	devfs_external_inode_xp = hal_remote_lwd( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1128
1129	// populate DEVFS in all clusters
1130	devfs_local_init( devfs_dev_inode_xp,
1131	devfs_external_inode_xp,
1132	&devfs_internal_inode_xp );
1133	}
1134
1135	/////////////////////////////////////////////////////////////////////////////////
1136	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1137	(info->x_size * info->y_size) );
1138	barrier_wait( &local_barrier , info->cores_nr );
1139	/////////////////////////////////////////////////////////////////////////////////
1140
1141	#if DEBUG_KERNEL_INIT
1142	if( (core_lid == 0) & (local_cxy == 0) )
1143	printk("\n[DBG] %s : exit barrier 7 : dev_root = %l in cluster 0 / cycle %d\n",
1144	__FUNCTION__, devfs_dev_inode_xp , (uint32_t)hal_get_cycles() );
1145	#endif
1146
1147	/////////////////////////////////////////////////////////////////////////////////
1148	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1149	/////////////////////////////////////////////////////////////////////////////////
1150
1151	if( (core_lid == 0) && (local_cxy == 0) )
1152	{
1153
1154	#if( DEBUG_KERNEL_INIT & 1 )
1155	vfs_display( vfs_root_inode_xp );
1156	#endif
1157
1158	process_init_create();
1159	}
1160
1161	/////////////////////////////////////////////////////////////////////////////////
1162	if( core_lid == 0 ) remote_barrier( XPTR( 0 , &global_barrier ),
1163	(info->x_size * info->y_size) );
1164	barrier_wait( &local_barrier , info->cores_nr );
1165	/////////////////////////////////////////////////////////////////////////////////
1166
1167	#if DEBUG_KERNEL_INIT
1168	if( (core_lid == 0) & (local_cxy == 0) )
1169	printk("\n[DBG] %s : exit barrier 8 : process init created / cycle %d\n",
1170	__FUNCTION__ , (uint32_t)hal_get_cycles() );
1171	#endif
1172
1173	#if (DEBUG_KERNEL_INIT & 1)
1174	if( (core_lid == 0) & (local_cxy == 0) )
1175	sched_display( 0 );
1176	#endif
1177
1178	/////////////////////////////////////////////////////////////////////////////////
1179	// STEP 9 : CP0 in cluster 0 print banner
1180	/////////////////////////////////////////////////////////////////////////////////
1181
1182	if( (core_lid == 0) && (local_cxy == 0) )
1183	{
1184	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1185
1186	#if( DEBUG_KERNEL_INIT & 1 )
1187	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1188	" - thread descriptor : %d bytes\n"
1189	" - process descriptor : %d bytes\n"
1190	" - cluster manager : %d bytes\n"
1191	" - chdev descriptor : %d bytes\n"
1192	" - core descriptor : %d bytes\n"
1193	" - scheduler : %d bytes\n"
1194	" - rpc fifo : %d bytes\n"
1195	" - page descriptor : %d bytes\n"
1196	" - mapper root : %d bytes\n"
1197	" - ppm manager : %d bytes\n"
1198	" - kcm manager : %d bytes\n"
1199	" - khm manager : %d bytes\n"
1200	" - vmm manager : %d bytes\n"
1201	" - gpt root : %d bytes\n"
1202	" - list item : %d bytes\n"
1203	" - xlist item : %d bytes\n"
1204	" - spinlock : %d bytes\n"
1205	" - remote spinlock : %d bytes\n"
1206	" - rwlock : %d bytes\n"
1207	" - remote rwlock : %d bytes\n",
1208	sizeof( thread_t ),
1209	sizeof( process_t ),
1210	sizeof( cluster_t ),
1211	sizeof( chdev_t ),
1212	sizeof( core_t ),
1213	sizeof( scheduler_t ),
1214	sizeof( remote_fifo_t ),
1215	sizeof( page_t ),
1216	sizeof( mapper_t ),
1217	sizeof( ppm_t ),
1218	sizeof( kcm_t ),
1219	sizeof( khm_t ),
1220	sizeof( vmm_t ),
1221	sizeof( gpt_t ),
1222	sizeof( list_entry_t ),
1223	sizeof( xlist_entry_t ),
1224	sizeof( spinlock_t ),
1225	sizeof( remote_spinlock_t ),
1226	sizeof( rwlock_t ),
1227	sizeof( remote_rwlock_t ));
1228	#endif
1229
1230	}
1231
1232	// each core activates its private TICK IRQ
1233	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1234
1235	#if DEBUG_KERNEL_INIT
1236	printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1237	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1238	#endif
1239
1240	// each core jump to thread_idle_func
1241	thread_idle_func();
1242	}
1243

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source: trunk/kernel/kern/kernel_init.c @ 490

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