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source: trunk/kernel/kern/kernel_init.c @ 88

Last change on this file since 88 was 77, checked in by max@…, 8 years ago
Start hiding the architecture-specific drivers behind the hal_drivers_xx interface.
File size: 38.0 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_types.h>
28	#include <hal_special.h>
29	#include <hal_context.h>
30	#include <barrier.h>
31	#include <remote_barrier.h>
32	#include <core.h>
33	#include <list.h>
34	#include <xlist.h>
35	#include <thread.h>
36	#include <scheduler.h>
37	#include <kmem.h>
38	#include <cluster.h>
39	#include <string.h>
40	#include <memcpy.h>
41	#include <ppm.h>
42	#include <page.h>
43	#include <chdev.h>
44	#include <boot_info.h>
45	#include <dqdt.h>
46	#include <dev_icu.h>
47	#include <dev_mmc.h>
48	#include <dev_dma.h>
49	#include <dev_iob.h>
50	#include <dev_ioc.h>
51	#include <dev_txt.h>
52	#include <dev_pic.h>
53	#include <printk.h>
54	#include <vfs.h>
55	#include <hal_drivers.h>
56	#include <devfs.h>
57	#include <mapper.h>
58
59
60	#define KERNEL_INIT_SYNCHRO 0xA5A5B5B5
61
62	///////////////////////////////////////////////////////////////////////////////////////////
63	// All these 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 build by the bootloader, and used by kernel_init.
69	// it must be 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 variables define the kernel process0 descriptor
88	__attribute__((section(".kdata")))
89	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
90
91	// This variable defines extended pointers on the distributed chdevs
92	__attribute__((section(".kdata")))
93	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
94
95	// This variable contains the input IRQ indexes for the PIC device
96	__attribute__((section(".kdata")))
97	chdev_pic_input_t chdev_pic_input CONFIG_CACHE_LINE_ALIGNED;
98
99	// This variable contains the input IRQ indexes for the ICU device
100	__attribute__((section(".kdata")))
101	chdev_icu_input_t chdev_icu_input CONFIG_CACHE_LINE_ALIGNED;
102
103	// This variable defines the local cluster identifier
104	__attribute__((section(".kdata")))
105	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
106
107	// This variable defines the TXT0 chdev descriptor
108	__attribute__((section(".kdata")))
109	chdev_t txt0_chdev CONFIG_CACHE_LINE_ALIGNED;
110
111	// This variable is used for CP0 cores sychronisation in kernel_init()
112	__attribute__((section(".kdata")))
113	remote_barrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
114
115	// This variable is used for local cores sychronisation in kernel_init()
116	__attribute__((section(".kdata")))
117	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119	// This variable defines the array of supported File System contexts
120	__attribute__((section(".kdata")))
121	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
122
123
124	///////////////////////////////////////////////////////////////////////////////////////////
125	// This function displays the ALMOS_MKH banner.
126	///////////////////////////////////////////////////////////////////////////////////////////
127	static void print_banner( uint32_t nclusters , uint32_t ncores )
128	{
129	printk("\n"
130	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
131	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
132	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
133	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
134	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
135	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
136	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
137	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
138	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
139	"\n\n\t\t\t Version 0.0 : %d clusters / %d cores per cluster\n\n", nclusters , ncores );
140	}
141
142
143	///////////////////////////////////////////////////////////////////////////////////////////
144	// This static function initializes the TXT0 chdev descriptor, associated to the "kernel
145	// terminal", and shared by all kernel instances for debug messages. It also register it
146	// in the chdev directory, containing extended pointers on all chdevs.
147	// The global variable txt0_chdev is replicated in all clusters, but only the chdev
148	// allocated in I/O cluster is used by ALMOS-MKH.
149	// Therefore, this function must be called by a thread running in the I/O cluster.
150	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
151	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
152	///////////////////////////////////////////////////////////////////////////////////////////
153	// @ info : pointer on the local boot-info structure.
154	///////////////////////////////////////////////////////////////////////////////////////////
155	static void txt0_device_init( boot_info_t * info )
156	{
157	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
158	uint32_t dev_nr; // actual number of devices in this cluster
159	xptr_t base; // remote pointer on segment base
160	uint32_t type; // peripheral type
161	uint32_t func; // device functionnal index
162	uint32_t impl; // device implementation index
163	uint32_t i; // device index in dev_tbl
164	uint32_t x; // X cluster coordinate
165	uint32_t y; // Y cluster coordinate
166
167	// get number of peripherals and base of devices array from boot_info
168	dev_nr = info->ext_dev_nr;
169	dev_tbl = info->ext_dev;
170
171	// loop on external peripherals to find TXT device
172	for( i = 0 ; i < dev_nr ; i++ )
173	{
174	base = dev_tbl[i].base;
175	type = dev_tbl[i].type;
176	func = FUNC_FROM_TYPE( type );
177	impl = IMPL_FROM_TYPE( type );
178
179	if (func == DEV_FUNC_TXT )
180	{
181	// initialize basic fields
182	txt0_chdev.func = func;
183	txt0_chdev.impl = impl;
184	txt0_chdev.channel = 0;
185	txt0_chdev.is_rx = 0;
186	txt0_chdev.base = base;
187
188	// initialize lock
189	remote_spinlock_init( XPTR( local_cxy , &txt0_chdev.wait_lock ) );
190
191	// complete TXT-specific initialization
192	hal_drivers_txt_init( &txt0_chdev );
193
194	// initialize the replicated chdev_dir[x][y] structures
195	for( x = 0 ; x < info->x_size ; x++ )
196	{
197	for( y = 0 ; y < info->y_size ; y++ )
198	{
199	cxy_t cxy = (x<<info->y_width) + y;
200	hal_remote_swd( XPTR( cxy , &chdev_dir.txt[0] ) ,
201	XPTR( local_cxy , &txt0_chdev ) );
202	}
203	}
204
205	kinit_dmsg("\n[INFO] %s : core[%x][0] created TXT0 chdev"
206	" / paddr = %l at cycle %d\n",
207	__FUNCTION__ , local_cxy , chdev_func_str( func ),
208	XPTR(local_cxy , &txt0_chdev) , hal_time_stamp() );
209	}
210
211	} // end loop on devices
212
213	} // end txt0_device_init()
214
215	///////////////////////////////////////////////////////////////////////////////////////////
216	// This static function allocates memory for the chdev (channel_device) descriptors
217	// associated to the internal peripherals contained in the local cluster. These internal
218	// devices (ICU, MMC, DMA) chdev descriptors are placed in the local cluster.
219	// It initialises these device descriptors as specified by the boot_info_t structure,
220	// including the dynamic linking with the driver for the specified implementation.
221	// Finally, all copies of the devices directory are initialised.
222	///////////////////////////////////////////////////////////////////////////////////////////
223	// @ info : pointer on the local boot-info structure.
224	///////////////////////////////////////////////////////////////////////////////////////////
225	static void internal_devices_init( boot_info_t * info )
226	{
227	boot_device_t * dev; // pointer on boot_info device (ICU/MMC/DMA)
228	uint32_t x; // X cluster coordinate
229	uint32_t y; // Y cluster coordinate
230	chdev_t * chdev_ptr; // local pointer on chdev descriptor
231	xptr_t chdev_xp; // extended pointer on chdev descriptor
232
233	/////////// ICU //////////
234
235	dev = &info->dev_icu;
236
237	assert( ((info->cores_nr == 0) \|\| (dev->channels != 0)) , __FUNCTION__ ,
238	"ICU device must exist in cluster containing cores" );
239
240	assert( (dev->channels == 1) , __FUNCTION__ ,
241	"channels number must be 1 for ICU device" );
242
243	assert( (FUNC_FROM_TYPE( dev->type ) == DEV_FUNC_ICU ) , __FUNCTION__ ,
244	" inconsistent ICU device type");
245
246	// create one chdev in local cluster
247	chdev_ptr = chdev_create( FUNC_FROM_TYPE( dev->type ),
248	IMPL_FROM_TYPE( dev->type ),
249	0, // channel
250	false, // TX
251	dev->base );
252
253	assert( (chdev_ptr != NULL) , __FUNCTION__ , "cannot allocate ICU chdev" );
254
255	// get extended pointer on chdev descriptor
256	chdev_xp = XPTR( local_cxy , chdev_ptr );
257
258	// make ICU specific initialisation
259	// TODO remove these three parameters
260	dev_icu_init( chdev_ptr , dev->param0 , dev->param1 , dev->param2 );
261
262	// initialize the ICU field in the chdev_dir[x][y] structures
263	// replicated in all clusters, and containing extended pointers
264	// on all remotely accessible devices
265	for( x = 0 ; x < info->x_size ; x++ )
266	{
267	for( y = 0 ; y < info->y_size ; y++ )
268	{
269	cxy_t cxy = (x<<info->y_width) + y;
270	hal_remote_swd( XPTR( cxy , &chdev_dir.icu[local_cxy] ) , chdev_xp );
271	}
272	}
273
274	// initialize the entries of the local chdev_icu_input structure
275	// defining how internal peripherals are connected to ICU
276	uint32_t id;
277	uint8_t valid;
278	uint32_t src_type;
279	uint8_t src_ch;
280	uint32_t src_func;
281	for( id = 0 ; id < CONFIG_MAX_HWIS_PER_ICU ; id++ )
282	{
283	valid = dev->irq[id].valid;
284	src_type = dev->irq[id].dev_type;
285	src_ch = dev->irq[id].channel;
286	src_func = FUNC_FROM_TYPE( src_type );
287
288	if( valid ) // only valid local IRQs are registered
289	{
290	if ( src_func == DEV_FUNC_MMC ) chdev_icu_input.mmc = id;
291	else if( src_func == DEV_FUNC_DMA ) chdev_icu_input.dma[src_ch] = id;
292	else assert( false , __FUNCTION__ , "illegal source device for ICU input" );
293	}
294	}
295
296	kinit_dmsg("\n[INFO] %s : core[%x][0] created ICU chdev at cycle %d\n",
297	__FUNCTION__ , local_cxy , hal_time_stamp() );
298
299	/////////// MMC internal chdev ///////////
300
301	dev = &info->dev_mmc;
302
303	if( dev->channels != 0 ) // MMC device is defined
304	{
305	assert( (dev->channels == 1) , __FUNCTION__ ,
306	"channels number must be 1 for MMC device" );
307
308	assert( (FUNC_FROM_TYPE( dev->type ) == DEV_FUNC_MMC ) , __FUNCTION__ ,
309	" inconsistent MMC device type");
310
311	// create one chdev in local cluster
312	chdev_ptr = chdev_create( FUNC_FROM_TYPE( dev->type ),
313	IMPL_FROM_TYPE( dev->type ),
314	0, // channel
315	false, // TX
316	dev->base );
317
318	assert( (chdev_ptr != NULL) , __FUNCTION__ , "cannot allocate MMC chdev" );
319
320	// get extended pointer on chdev descriptor
321	chdev_xp = XPTR( local_cxy , chdev_ptr );
322
323	// make MMC specific initialisation
324	dev_mmc_init( chdev_ptr );
325
326	// initialize the MMC field in the chdev_dir[x][y] structures
327	// replicated in all clusters, and containing extended pointers
328	// on all remotely accessible devices
329	for( x = 0 ; x < info->x_size ; x++ )
330	{
331	for( y = 0 ; y < info->y_size ; y++ )
332	{
333	cxy_t cxy = (x<<info->y_width) + y;
334	hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ) , chdev_xp );
335	}
336	}
337
338	kinit_dmsg("\n[INFO] %s : core[%x][0] created MMC chdev at cycle %d\n",
339	__FUNCTION__ , local_cxy , hal_time_stamp() );
340	}
341
342	/////////// DMA internal chdevs //////////
343
344	dev = &info->dev_dma;
345
346	if( dev->channels != 0 ) // DMA device is defined
347	{
348	assert( (FUNC_FROM_TYPE( dev->type ) == DEV_FUNC_DMA ) , __FUNCTION__ ,
349	" inconsistent DMA device type");
350
351	// create one chdev per channel in local cluster
352	uint32_t channel;
353	for( channel = 0 ; channel < dev->channels ; channel++ )
354	{
355	chdev_ptr = chdev_create( FUNC_FROM_TYPE( dev->type ),
356	IMPL_FROM_TYPE( dev->type ),
357	channel, // channel
358	false, // TX
359	dev->base );
360
361	assert( (chdev_ptr != NULL) , __FUNCTION__ , "cannot allocate DMA chdev" );
362
363	// get extended pointer on channel descriptor
364	chdev_xp = XPTR( local_cxy , chdev_ptr );
365
366	// make DMA specific initialisation
367	dev_dma_init( chdev_ptr );
368
369	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
370	// structure because the DMA device is not remotely accessible.
371	chdev_dir.dma[channel] = chdev_xp;
372
373	kinit_dmsg("\n[INFO] %s : core[%x][0] created DMA[%d] chdev at cycle %d\n",
374	__FUNCTION__ , local_cxy , channel , hal_time_stamp() );
375	}
376	}
377	} // end internal_devices_init()
378
379	///////////////////////////////////////////////////////////////////////////////////////////
380	// This static function allocates memory for the chdev descriptors associated
381	// to the external (shared) peripherals contained in the local cluster. These external
382	// devices (IOB, IOC, TXT, NIC, etc ) are distributed on all clusters.
383	// It initialises these device descriptors as specified by the boot_info_t structure,
384	// including the dynamic linking with the driver for the specified implementation.
385	// Finally, all copies of the devices directory are initialised.
386	//
387	// The number of channel_devices depends on the device functionnal type.
388	// There is three nested loops to build the full set of external channel_devices:
389	// - loop on external devices.
390	// - loop on channels for multi-channels devices.
391	// - loop on directions (RX/TX) for NIC device.
392	// The set of channel_devices is indexed by the chdev_gid global index, that is used
393	// to select the cluster containing a given chdev[func,channel,direction].
394	// All clusters scan the full set of chdevs, but only the cluster matching
395	// (chdev_gid % (x_size*y_size)) create the corresponding chdev.
396	//
397	// TODO check that cluster IO contains a PIC [AG]
398	// TODO make a default initialisation for the chdev_dir structure (XPTR_NULL ) [AG]
399	///////////////////////////////////////////////////////////////////////////////////////////
400	// @ info : pointer on the local boot-info structure.
401	///////////////////////////////////////////////////////////////////////////////////////////
402	static void external_devices_init( boot_info_t * info )
403	{
404	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
405	uint32_t dev_nr; // actual number of devices in this cluster
406	xptr_t base; // remote pointer on segment base
407	uint32_t type; // peripheral type
408	uint32_t func; // device functionnal index
409	uint32_t impl; // device implementation index
410	uint32_t i; // device index in dev_tbl
411	uint32_t x; // X cluster coordinate
412	uint32_t y; // Y cluster coordinate
413	uint32_t channels_nr; // number of channels
414	uint32_t channel; // channel index
415	uint32_t directions_nr; // number of directions
416	uint32_t direction; // direction index
417	uint32_t p0; // device parameter 0
418	uint32_t p1; // device parameter 1
419	uint32_t p2; // device parameter 2
420	uint32_t p3; // device parameter 3
421	uint32_t first_channel; // used in loop on channels
422
423	chdev_t * chdev; // local pointer on one channel_device descriptor
424	xptr_t chdev_xp; // extended pointer on channel_device descriptor
425	uint32_t chdev_gid = 0; // global index of channel_device descriptor
426
427	// get number of peripherals and base of devices array from boot_info
428	dev_nr = info->ext_dev_nr;
429	dev_tbl = info->ext_dev;
430
431	// loop on external peripherals
432	for( i = 0 ; i < dev_nr ; i++ )
433	{
434	base = dev_tbl[i].base;
435	type = dev_tbl[i].type;
436	channels_nr = dev_tbl[i].channels;
437	p0 = dev_tbl[i].param0;
438	p1 = dev_tbl[i].param1;
439	p2 = dev_tbl[i].param2;
440	p3 = dev_tbl[i].param3;
441
442	func = FUNC_FROM_TYPE( type );
443	impl = IMPL_FROM_TYPE( type );
444
445	// There is one chdev per direction for NIC
446	if (func == DEV_FUNC_NIC) directions_nr = 2;
447	else directions_nr = 1;
448
449	// The TXT0 chdev has already been created
450	if (func == DEV_FUNC_TXT) first_channel = 1;
451	else first_channel = 0;
452
453	// do nothing for ROM, that does not require a device descriptor.
454	if( func == DEV_FUNC_ROM ) continue;
455
456	// check external device functionnal type
457	if( (func != DEV_FUNC_IOB) &&
458	(func != DEV_FUNC_PIC) &&
459	(func != DEV_FUNC_IOC) &&
460	(func != DEV_FUNC_TXT) &&
461	(func != DEV_FUNC_NIC) &&
462	(func != DEV_FUNC_FBF) )
463	{
464	assert( false , __FUNCTION__ , "undefined external peripheral type" );
465	}
466
467	// loops on channels
468	for( channel = first_channel ; channel < channels_nr ; channel++ )
469	{
470	// loop on directions
471	for( direction = 0 ; direction < directions_nr ; direction++ )
472	{
473	// get target cluster for chdev[func,channel,direction]
474	uint32_t offset = chdev_gid % ( info->x_size * info->y_size );
475	uint32_t cx = offset / info->y_size;
476	uint32_t cy = offset % info->y_size;
477	uint32_t target_cxy = (cx<<info->y_width) + cy;
478
479	// allocate and initialize a local chdev
480	// if local cluster matches target cluster
481	if( target_cxy == local_cxy )
482	{
483	chdev = chdev_create( func,
484	impl,
485	channel,
486	direction,
487	base );
488
489	assert( (chdev != NULL), __FUNCTION__ ,
490	"cannot allocate external device" );
491
492	// get extended pointer on chdev
493	chdev_xp = XPTR( local_cxy , chdev );
494
495	// make device type specific initialisation
496	// the number of parameters depends on the device type
497	// TODO : remove the parameters that must be provided by the drivers
498	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
499	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
500	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
501	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
502	else if( func == DEV_FUNC_PIC ) dev_pic_init( chdev , p0 );
503	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev , p0 , p1 );
504	else
505	{
506	assert( false , __FUNCTION__ , "undefined device type" );
507	}
508
509	// all external (shared) devices are remotely accessible
510	// initialize the replicated chdev_dir[x][y] structures
511	// defining the extended pointers on chdev descriptors
512	xptr_t * entry;
513
514	if( func == DEV_FUNC_IOB ) entry = &chdev_dir.iob;
515	if( func == DEV_FUNC_PIC ) entry = &chdev_dir.pic;
516	if( func == DEV_FUNC_TXT ) entry = &chdev_dir.txt[channel];
517	if( func == DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
518	if( func == DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
519	if( func == DEV_FUNC_NIC ) entry = &chdev_dir.nic_tx[channel];
520
521	for( x = 0 ; x < info->x_size ; x++ )
522	{
523	for( y = 0 ; y < info->y_size ; y++ )
524	{
525	cxy_t cxy = (x<<info->y_width) + y;
526	hal_remote_swd( XPTR( cxy , entry ) , chdev_xp );
527	}
528	}
529
530	kinit_dmsg("\n[INFO] %s : core[%x][0] create chdev %s[%d] at cycle %d\n",
531	__FUNCTION__ , local_cxy , chdev_func_str( func ),
532	channel , hal_time_stamp() );
533
534	} // end if match
535
536	// increment chdev global index (matching or not)
537	chdev_gid++;
538
539	} // end loop on directions
540
541	} // end loop on channels
542
543	// initialize the entries of the local chdev_pic_input structure
544	// defining how external peripherals are connected to PIC
545	if( func == DEV_FUNC_PIC )
546	{
547	uint32_t id;
548	uint8_t valid;
549	uint32_t dev_type;
550	uint8_t channel;
551	uint8_t is_rx;
552
553	// loop on PIC inputs
554	for( id = 0 ; id < CONFIG_MAX_IRQS_PER_PIC ; id++ )
555	{
556	valid = dev_tbl[i].irq[id].valid;
557	dev_type = dev_tbl[i].irq[id].dev_type;
558	channel = dev_tbl[i].irq[id].channel;
559	is_rx = dev_tbl[i].irq[id].is_rx;
560
561	if( valid ) // only valid inputs are registered
562	{
563	uint32_t * index; // local pointer on one entry
564	uint16_t dev_func = FUNC_FROM_TYPE( dev_type );
565
566	if( dev_func == DEV_FUNC_TXT )
567	{
568	index = &chdev_pic_input.txt[channel];
569	}
570	else if( dev_func == DEV_FUNC_IOC )
571	{
572	index = &chdev_pic_input.ioc[channel];
573	}
574	else if( (dev_func == DEV_FUNC_NIC) && (is_rx == 0) )
575	{
576	index = &chdev_pic_input.nic_tx[channel];
577	}
578	else if( (dev_func == DEV_FUNC_NIC) && (is_rx != 0) )
579	{
580	index = &chdev_pic_input.nic_rx[channel];
581	}
582	else
583	{
584	assert( false , __FUNCTION__ , "illegal source device for PIC input" );
585	}
586
587	// set entry in local structure
588	*index = id;
589	}
590	} // end loop on PIC inputs
591	} // end PIC
592	} // end loop on devices
593	} // end external_devices_init()
594
595
596	///////////////////////////////////////////////////////////////////////////////////////////
597	// This static function returns the identifiers of the calling core.
598	///////////////////////////////////////////////////////////////////////////////////////////
599	// @ info : pointer on boot_info structure.
600	// @ lid : [out] core local index in cluster.
601	// @ cxy : [out] cluster identifier.
602	// @ lid : [out] core global identifier (hardware).
603	// @ return 0 if success / return EINVAL if not found.
604	///////////////////////////////////////////////////////////////////////////////////////////
605	static error_t get_core_identifiers( boot_info_t * info,
606	lid_t * lid,
607	cxy_t * cxy,
608	gid_t * gid )
609	{
610	uint32_t i;
611	gid_t global_id;
612
613	// get global identifier from hardware register
614	global_id = hal_get_gid();
615
616	// makes an associative search in boot_info to get (cxy,lid) from global_id
617	for( i = 0 ; i < info->cores_nr ; i++ )
618	{
619	if( global_id == info->core[i].gid )
620	{
621	*lid = info->core[i].lid;
622	*cxy = info->core[i].cxy;
623	*gid = global_id;
624	return 0;
625	}
626	}
627	return EINVAL;
628	}
629
630	///////////////////////////////////////////////////////////////////////////////////////////
631	// This function is the entry point for the kernel initialisation.
632	// It is executed by all cores in all clusters, but only core[0], called CP0,
633	// initializes the shared resources such as the cluster manager, or the local peripherals.
634	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
635	// only information contained in the local boot_info_t structure, set by the bootloader.
636	///////////////////////////////////////////////////////////////////////////////////////////
637	// @ info : pointer on the local boot-info structure.
638	///////////////////////////////////////////////////////////////////////////////////////////
639	void kernel_init( boot_info_t * info )
640	{
641	lid_t core_lid = -1; // running core local index
642	cxy_t core_cxy = -1; // running core cluster identifier
643	gid_t core_gid; // running core hardware identifier
644	cluster_t * cluster; // pointer on local cluster manager
645	core_t * core; // pointer on running core descriptor
646	thread_t * thread; // pointer on idle thread descriptor
647	error_t error;
648
649	// all cores get core identifiers
650	error = get_core_identifiers( info,
651	&core_lid,
652	&core_cxy,
653	&core_gid );
654
655	// CP0 initialise cluster identifier
656	if( core_lid == 0 ) local_cxy = info->cxy;
657
658	// each core get pointer on its private idle thread descriptor
659	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
660
661	// each core registers this thread pointer in hardware register
662	hal_set_current_thread( thread );
663
664	#ifdef __HAL_x86_64__
665	return;
666	#endif
667
668	// CP0 in I/O cluster initialises TXT0 chdev descriptor
669	if( (core_lid == 0) && (core_cxy == info->io_cxy) ) txt0_device_init( info );
670
671	/////////////////////////////////////////////////////////////////////////////////
672	// global & local synchro to protect access to TXT0 terminal
673	if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
674	(info->x_size * info->y_size) );
675	barrier_wait( &local_barrier , info->cores_nr );
676	/////////////////////////////////////////////////////////////////////////////////
677
678	kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 0 at cycle %d\n",
679	__FUNCTION__ , core_cxy , core_lid , hal_time_stamp() );
680
681	// all cores check core identifiers
682	if( error )
683	{
684	printk("\n[PANIC] in %s : illegal core identifiers"
685	" gid = %x / cxy = %x / lid = %d\n",
686	__FUNCTION__ , core_lid , core_cxy , core_lid );
687	hal_core_sleep();
688	}
689
690	// CP0 initializes the local cluster manager (cores and memory allocators)
691	if( core_lid == 0 )
692	{
693	error = cluster_init( info );
694
695	if( error )
696	{
697	printk("\n[PANIC] in %s : cannot initialise cluster manager in cluster %x",
698	__FUNCTION__ , local_cxy );
699	hal_core_sleep();
700	}
701	}
702
703	/////////////////////////////////////////////////////////////////////////////////
704	// global & local synchro, to protect access to cluster manager
705	if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
706	(info->x_size * info->y_size) );
707	barrier_wait( &local_barrier , info->cores_nr );
708	/////////////////////////////////////////////////////////////////////////////////
709
710	kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 1 at cycle %d\n",
711	__FUNCTION__ , core_cxy , core_lid , hal_time_stamp() );
712
713	// all cores get pointer on local cluster manager and on core descriptor
714	cluster = &cluster_manager;
715	core = &cluster->core_tbl[core_lid];
716
717	// CP0 initializes the process_zero descriptor
718	if( core_lid == 0 ) process_zero_init( info );
719
720	// CP0 allocates and initialises the internal peripheral chdev descriptors.
721	// Each CP0[cxy] scan the set of its internal (private) peripherals,
722	// and allocate memory for the corresponding chdev descriptors.
723	if( core_lid == 0 ) internal_devices_init( info );
724
725	// CP0 allocates one WTI mailbbox per core for Inter Processor Interrupt
726	// this must be done after ICU chdev initialisation, by CP0 only, and before
727	// external devices initialisation to enforce the rule :
728	// "The WTI index for the IPI routed to core[lid] is lid"
729	if( core_lid == 0 )
730	{
731	uint32_t wti_id;
732	uint32_t lid;
733	for( lid = 0 ; lid < LOCAL_CLUSTER->cores_nr ; lid++ )
734	{
735	wti_id = dev_icu_wti_alloc();
736
737	if( wti_id != lid )
738	{
739	printk("\n[PANIC] in %s : WTI index for IPI = %d / core_lid = %d",
740	__FUNCTION__ , wti_id , lid );
741	hal_core_sleep();
742	}
743
744	dev_icu_enable_irq( lid , WTI_TYPE , wti_id , NULL );
745	}
746	}
747
748	// All CP0s contribute to initialise external peripheral chdev descriptors.
749	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
750	// and allocates memory for the chdev descriptors that must be placed
751	// on the (cxy) cluster according to the global index value.
752	if( core_lid == 0 ) external_devices_init( info );
753
754	/////////////////////////////////////////////////////////////////////////////////
755	// global &local synchro to protect access to peripherals
756	if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
757	(info->x_size * info->y_size) );
758	barrier_wait( &local_barrier , info->cores_nr );
759	/////////////////////////////////////////////////////////////////////////////////
760
761	kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 2 at cycle %d\n",
762	__FUNCTION__ , core_cxy , core_lid , hal_time_stamp() );
763
764
765	error = thread_kernel_init( thread,
766	THREAD_IDLE,
767	&thread_idle_func,
768	NULL,
769	core_lid );
770	if( error )
771	{
772	printk("\n[PANIC] in %s : core[%x][%d] cannot initialize idle thread\n",
773	__FUNCTION__ , local_cxy , core_lid );
774	hal_core_sleep();
775	}
776	else
777	{
778	// register idle thread in scheduler
779	core->scheduler.idle = thread;
780
781	// activate the idle thread
782	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
783
784	kinit_dmsg("\n[INFO] %s : core[%x][%d] created idle thread %x at cycle %d\n",
785	__FUNCTION__ , core_cxy , core_lid , thread , hal_time_stamp());
786	}
787
788	// CP0 in all clusters initializes cooperatively VFS and DEVFS
789	if( (core_lid == 0) )
790	{
791	xptr_t root_inode_xp;
792
793	// initialize root File System (must be FATFS in this implementation)
794	if( CONFIG_VFS_ROOT_IS_FATFS )
795	{
796	root_inode_xp = fatfs_init();
797	}
798	else
799	{
800	printk("\n[PANIC] in %s : root FS must be FATFS\n", __FUNCTION__ );
801	hal_core_sleep();
802	}
803
804	if( root_inode_xp == XPTR_NULL )
805	{
806	printk("\n[PANIC] in %s : core[%x][%d] cannot initialize file system\n",
807	__FUNCTION__ , local_cxy , core_lid );
808	hal_core_sleep();
809	}
810
811	// mount the DEVFS File system
812	devfs_mount( root_inode_xp , "dev" );
813	}
814
815	// CP0 in I/O cluster print banner
816	if( (core_lid == 0) && (local_cxy == info->io_cxy) )
817	{
818	print_banner( (info->x_size * info->y_size) , info->cores_nr );
819
820	kinit_dmsg("\n\n* memory fooprint of main kernet objects *\n"
821	" - thread descriptor : %d bytes\n"
822	" - process descriptor : %d bytes\n"
823	" - cluster manager : %d bytes\n"
824	" - chdev descriptor : %d bytes\n"
825	" - core descriptor : %d bytes\n"
826	" - scheduler : %d bytes\n"
827	" - rpc fifo : %d bytes\n"
828	" - page descriptor : %d bytes\n"
829	" - mapper root : %d bytes\n"
830	" - ppm manager : %d bytes\n"
831	" - kcm manager : %d bytes\n"
832	" - khm manager : %d bytes\n"
833	" - vmm manager : %d bytes\n"
834	" - gpt root : %d bytes\n"
835	" - list item : %d bytes\n"
836	" - xlist item : %d bytes\n"
837	" - spinlock : %d bytes\n"
838	" - remote spinlock : %d bytes\n"
839	" - rwlock : %d bytes\n"
840	" - remote rwlock : %d bytes\n",
841	sizeof( thread_t ),
842	sizeof( process_t ),
843	sizeof( cluster_t ),
844	sizeof( chdev_t ),
845	sizeof( core_t ),
846	sizeof( scheduler_t ),
847	sizeof( rpc_fifo_t ),
848	sizeof( page_t ),
849	sizeof( mapper_t ),
850	sizeof( ppm_t ),
851	sizeof( kcm_t ),
852	sizeof( khm_t ),
853	sizeof( vmm_t ),
854	sizeof( gpt_t ),
855	sizeof( list_entry_t ),
856	sizeof( xlist_entry_t ),
857	sizeof( spinlock_t ),
858	sizeof( remote_spinlock_t ),
859	sizeof( rwlock_t ),
860	sizeof( remote_rwlock_t ));
861	}
862
863	/////////////////////////////////////////////////////////////////////////////////
864	// global syncho to protect access to File System
865	if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
866	(info->x_size * info->y_size) );
867	barrier_wait( &local_barrier , info->cores_nr );
868	/////////////////////////////////////////////////////////////////////////////////
869
870	kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 3 at cycle %d\n",
871	__FUNCTION__ , core_cxy , core_lid , hal_time_stamp() );
872
873	// each core activates its private PTI IRQ
874	dev_icu_set_period( core_lid , CONFIG_SCHED_TICK_PERIOD );
875	dev_icu_enable_irq( core_lid , PTI_TYPE , core_lid , NULL );
876
877	// each core get its private IRQ masks values and
878	uint32_t hwi_mask;
879	uint32_t wti_mask;
880	uint32_t pti_mask;
881	dev_icu_get_masks( core_lid , &hwi_mask , &wti_mask , &pti_mask );
882
883	thread_dmsg("\n[INFO] %s : core[%x][%d] activates scheduler at cycle %d\n"
884	" hwi_mask = %x / wti_mask = %x / pti_mask = %x\n",
885	__FUNCTION__ , local_cxy , core_lid , hal_time_stamp() ,
886	hwi_mask , wti_mask , pti_mask );
887
888	// each core jump to idle thread
889	thread_idle_func();
890
891	} // end kernel_init()
892

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