source: trunk/kernel/kern/kernel_init.c@ 103

Last change on this file since 103 was 103, checked in by alain, 9 years ago

Introducing a nolock_printk() function used by kernel_init.
File size: 38.9 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#include <soclib_tty.h>
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")))
76boot_info_t boot_info;
77
78// This variable defines the "idle" threads descriptors array
79__attribute__((section(".kidle")))
80char 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")))
85cluster_t cluster_manager CONFIG_CACHE_LINE_ALIGNED;
86
87// This variables define the kernel process0 descriptor
88__attribute__((section(".kdata")))
89process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
90
91// This variable defines extended pointers on the distributed chdevs
92__attribute__((section(".kdata")))
93chdev_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")))
97chdev_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")))
101chdev_icu_input_t chdev_icu_input CONFIG_CACHE_LINE_ALIGNED;
102
103// This variable defines the local cluster identifier
104__attribute__((section(".kdata")))
105cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
106
107// This variable defines the TXT0 chdev descriptor
108__attribute__((section(".kdata")))
109chdev_t txt0_chdev CONFIG_CACHE_LINE_ALIGNED;
110
111// This variable is used for CP0 cores sychronisation in kernel_init()
112__attribute__((section(".kdata")))
113remote_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")))
117barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119// This variable defines the array of supported File System contexts
120__attribute__((section(".kdata")))
121vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
122
123
124///////////////////////////////////////////////////////////////////////////////////////////
125// This function displays the ALMOS_MKH banner.
126///////////////////////////////////////////////////////////////////////////////////////////
127static 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///////////////////////////////////////////////////////////////////////////////////////////
155static 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 // TODO use generic device initialisation
192 // hal_drivers_txt_init( &txt0_chdev );
193
194 if( impl == IMPL_TXT_TTY )
195 {
196 txt0_chdev.cmd = &soclib_tty_cmd;
197 txt0_chdev.isr = &soclib_tty_isr;
198 soclib_tty_init( &txt0_chdev );
199 }
200
201 // initialize the replicated chdev_dir[x][y] structures
202 for( x = 0 ; x < info->x_size ; x++ )
203 {
204 for( y = 0 ; y < info->y_size ; y++ )
205 {
206 cxy_t cxy = (x<<info->y_width) + y;
207 hal_remote_swd( XPTR( cxy , &chdev_dir.txt[0] ) ,
208 XPTR( local_cxy , &txt0_chdev ) );
209 }
210 }
211
212 kinit_dmsg("\n[INFO] %s : core[%x][0] created TXT0 chdev"
213 " / paddr = %l at cycle %d\n",
214 __FUNCTION__ , local_cxy , chdev_func_str( func ),
215 XPTR(local_cxy , &txt0_chdev) , hal_get_cycles() );
216 }
217
218 } // end loop on devices
219
220} // end txt0_device_init()
221
222///////////////////////////////////////////////////////////////////////////////////////////
223// This static function allocates memory for the chdev (channel_device) descriptors
224// associated to the internal peripherals contained in the local cluster. These internal
225// devices (ICU, MMC, DMA) chdev descriptors are placed in the local cluster.
226// It initialises these device descriptors as specified by the boot_info_t structure,
227// including the dynamic linking with the driver for the specified implementation.
228// Finally, all copies of the devices directory are initialised.
229///////////////////////////////////////////////////////////////////////////////////////////
230// @ info : pointer on the local boot-info structure.
231///////////////////////////////////////////////////////////////////////////////////////////
232static void internal_devices_init( boot_info_t * info )
233{
234 boot_device_t * dev; // pointer on boot_info device (ICU/MMC/DMA)
235 uint32_t x; // X cluster coordinate
236 uint32_t y; // Y cluster coordinate
237 chdev_t * chdev_ptr; // local pointer on chdev descriptor
238 xptr_t chdev_xp; // extended pointer on chdev descriptor
239
240 /////////// ICU //////////
241
242 dev = &info->dev_icu;
243
244 assert( ((info->cores_nr == 0) || (dev->channels != 0)) , __FUNCTION__ ,
245 "ICU device must exist in cluster containing cores" );
246
247 assert( (dev->channels == 1) , __FUNCTION__ ,
248 "channels number must be 1 for ICU device" );
249
250 assert( (FUNC_FROM_TYPE( dev->type ) == DEV_FUNC_ICU ) , __FUNCTION__ ,
251 " inconsistent ICU device type");
252
253 // create one chdev in local cluster
254 chdev_ptr = chdev_create( FUNC_FROM_TYPE( dev->type ),
255 IMPL_FROM_TYPE( dev->type ),
256 0, // channel
257 false, // TX
258 dev->base );
259
260 assert( (chdev_ptr != NULL) , __FUNCTION__ , "cannot allocate ICU chdev" );
261
262 // get extended pointer on chdev descriptor
263 chdev_xp = XPTR( local_cxy , chdev_ptr );
264
265 // make ICU specific initialisation
266 // TODO remove these three parameters
267 dev_icu_init( chdev_ptr , dev->param0 , dev->param1 , dev->param2 );
268
269 // initialize the ICU field in the chdev_dir[x][y] structures
270 // replicated in all clusters, and containing extended pointers
271 // on all remotely accessible devices
272 for( x = 0 ; x < info->x_size ; x++ )
273 {
274 for( y = 0 ; y < info->y_size ; y++ )
275 {
276 cxy_t cxy = (x<<info->y_width) + y;
277 hal_remote_swd( XPTR( cxy , &chdev_dir.icu[local_cxy] ) , chdev_xp );
278 }
279 }
280
281 // initialize the entries of the local chdev_icu_input structure
282 // defining how internal peripherals are connected to ICU
283 uint32_t id;
284 uint8_t valid;
285 uint32_t src_type;
286 uint8_t src_ch;
287 uint32_t src_func;
288 for( id = 0 ; id < CONFIG_MAX_HWIS_PER_ICU ; id++ )
289 {
290 valid = dev->irq[id].valid;
291 src_type = dev->irq[id].dev_type;
292 src_ch = dev->irq[id].channel;
293 src_func = FUNC_FROM_TYPE( src_type );
294
295 if( valid ) // only valid local IRQs are registered
296 {
297 if ( src_func == DEV_FUNC_MMC ) chdev_icu_input.mmc = id;
298 else if( src_func == DEV_FUNC_DMA ) chdev_icu_input.dma[src_ch] = id;
299 else assert( false , __FUNCTION__ , "illegal source device for ICU input" );
300 }
301 }
302
303 kinit_dmsg("\n[INFO] %s : core[%x][0] created ICU chdev at cycle %d\n",
304 __FUNCTION__ , local_cxy , hal_get_cycles() );
305
306 /////////// MMC internal chdev ///////////
307
308 dev = &info->dev_mmc;
309
310 if( dev->channels != 0 ) // MMC device is defined
311 {
312 assert( (dev->channels == 1) , __FUNCTION__ ,
313 "channels number must be 1 for MMC device" );
314
315 assert( (FUNC_FROM_TYPE( dev->type ) == DEV_FUNC_MMC ) , __FUNCTION__ ,
316 " inconsistent MMC device type");
317
318 // create one chdev in local cluster
319 chdev_ptr = chdev_create( FUNC_FROM_TYPE( dev->type ),
320 IMPL_FROM_TYPE( dev->type ),
321 0, // channel
322 false, // TX
323 dev->base );
324
325 assert( (chdev_ptr != NULL) , __FUNCTION__ , "cannot allocate MMC chdev" );
326
327 // get extended pointer on chdev descriptor
328 chdev_xp = XPTR( local_cxy , chdev_ptr );
329
330 // make MMC specific initialisation
331 dev_mmc_init( chdev_ptr );
332
333 // initialize the MMC field in the chdev_dir[x][y] structures
334 // replicated in all clusters, and containing extended pointers
335 // on all remotely accessible devices
336 for( x = 0 ; x < info->x_size ; x++ )
337 {
338 for( y = 0 ; y < info->y_size ; y++ )
339 {
340 cxy_t cxy = (x<<info->y_width) + y;
341 hal_remote_swd( XPTR( cxy , &chdev_dir.mmc[local_cxy] ) , chdev_xp );
342 }
343 }
344
345 kinit_dmsg("\n[INFO] %s : core[%x][0] created MMC chdev at cycle %d\n",
346 __FUNCTION__ , local_cxy , hal_get_cycles() );
347 }
348
349 /////////// DMA internal chdevs //////////
350
351 dev = &info->dev_dma;
352
353 if( dev->channels != 0 ) // DMA device is defined
354 {
355 assert( (FUNC_FROM_TYPE( dev->type ) == DEV_FUNC_DMA ) , __FUNCTION__ ,
356 " inconsistent DMA device type");
357
358 // create one chdev per channel in local cluster
359 uint32_t channel;
360 for( channel = 0 ; channel < dev->channels ; channel++ )
361 {
362 chdev_ptr = chdev_create( FUNC_FROM_TYPE( dev->type ),
363 IMPL_FROM_TYPE( dev->type ),
364 channel, // channel
365 false, // TX
366 dev->base );
367
368 assert( (chdev_ptr != NULL) , __FUNCTION__ , "cannot allocate DMA chdev" );
369
370 // get extended pointer on channel descriptor
371 chdev_xp = XPTR( local_cxy , chdev_ptr );
372
373 // make DMA specific initialisation
374 dev_dma_init( chdev_ptr );
375
376 // initialize only the DMA[channel] field in the local chdev_dir[x][y]
377 // structure because the DMA device is not remotely accessible.
378 chdev_dir.dma[channel] = chdev_xp;
379
380 kinit_dmsg("\n[INFO] %s : core[%x][0] created DMA[%d] chdev at cycle %d\n",
381 __FUNCTION__ , local_cxy , channel , hal_get_cycles() );
382 }
383 }
384} // end internal_devices_init()
385
386///////////////////////////////////////////////////////////////////////////////////////////
387// This static function allocates memory for the chdev descriptors associated
388// to the external (shared) peripherals contained in the local cluster. These external
389// devices (IOB, IOC, TXT, NIC, etc ) are distributed on all clusters.
390// It initialises these device descriptors as specified by the boot_info_t structure,
391// including the dynamic linking with the driver for the specified implementation.
392// Finally, all copies of the devices directory are initialised.
393//
394// The number of channel_devices depends on the device functionnal type.
395// There is three nested loops to build the full set of external channel_devices:
396// - loop on external devices.
397// - loop on channels for multi-channels devices.
398// - loop on directions (RX/TX) for NIC device.
399// The set of channel_devices is indexed by the chdev_gid global index, that is used
400// to select the cluster containing a given chdev[func,channel,direction].
401// All clusters scan the full set of chdevs, but only the cluster matching
402// (chdev_gid % (x_size*y_size)) create the corresponding chdev.
403//
404// TODO check that cluster IO contains a PIC [AG]
405// TODO make a default initialisation for the chdev_dir structure (XPTR_NULL ) [AG]
406///////////////////////////////////////////////////////////////////////////////////////////
407// @ info : pointer on the local boot-info structure.
408///////////////////////////////////////////////////////////////////////////////////////////
409static void external_devices_init( boot_info_t * info )
410{
411 boot_device_t * dev_tbl; // pointer on array of devices in boot_info
412 uint32_t dev_nr; // actual number of devices in this cluster
413 xptr_t base; // remote pointer on segment base
414 uint32_t type; // peripheral type
415 uint32_t func; // device functionnal index
416 uint32_t impl; // device implementation index
417 uint32_t i; // device index in dev_tbl
418 uint32_t x; // X cluster coordinate
419 uint32_t y; // Y cluster coordinate
420 uint32_t channels_nr; // number of channels
421 uint32_t channel; // channel index
422 uint32_t directions_nr; // number of directions
423 uint32_t direction; // direction index
424 uint32_t p0; // device parameter 0
425 uint32_t p1; // device parameter 1
426 uint32_t p2; // device parameter 2
427 uint32_t p3; // device parameter 3
428 uint32_t first_channel; // used in loop on channels
429
430 chdev_t * chdev; // local pointer on one channel_device descriptor
431 xptr_t chdev_xp; // extended pointer on channel_device descriptor
432 uint32_t chdev_gid = 0; // global index of channel_device descriptor
433
434 // get number of peripherals and base of devices array from boot_info
435 dev_nr = info->ext_dev_nr;
436 dev_tbl = info->ext_dev;
437
438 // loop on external peripherals
439 for( i = 0 ; i < dev_nr ; i++ )
440 {
441 base = dev_tbl[i].base;
442 type = dev_tbl[i].type;
443 channels_nr = dev_tbl[i].channels;
444 p0 = dev_tbl[i].param0;
445 p1 = dev_tbl[i].param1;
446 p2 = dev_tbl[i].param2;
447 p3 = dev_tbl[i].param3;
448
449 func = FUNC_FROM_TYPE( type );
450 impl = IMPL_FROM_TYPE( type );
451
452 // There is one chdev per direction for NIC
453 if (func == DEV_FUNC_NIC) directions_nr = 2;
454 else directions_nr = 1;
455
456 // The TXT0 chdev has already been created
457 if (func == DEV_FUNC_TXT) first_channel = 1;
458 else first_channel = 0;
459
460 // do nothing for ROM, that does not require a device descriptor.
461 if( func == DEV_FUNC_ROM ) continue;
462
463 // check external device functionnal type
464 if( (func != DEV_FUNC_IOB) &&
465 (func != DEV_FUNC_PIC) &&
466 (func != DEV_FUNC_IOC) &&
467 (func != DEV_FUNC_TXT) &&
468 (func != DEV_FUNC_NIC) &&
469 (func != DEV_FUNC_FBF) )
470 {
471 assert( false , __FUNCTION__ , "undefined external peripheral type" );
472 }
473
474 // loops on channels
475 for( channel = first_channel ; channel < channels_nr ; channel++ )
476 {
477 // loop on directions
478 for( direction = 0 ; direction < directions_nr ; direction++ )
479 {
480 // get target cluster for chdev[func,channel,direction]
481 uint32_t offset = chdev_gid % ( info->x_size * info->y_size );
482 uint32_t cx = offset / info->y_size;
483 uint32_t cy = offset % info->y_size;
484 uint32_t target_cxy = (cx<<info->y_width) + cy;
485
486 // allocate and initialize a local chdev
487 // if local cluster matches target cluster
488 if( target_cxy == local_cxy )
489 {
490 chdev = chdev_create( func,
491 impl,
492 channel,
493 direction,
494 base );
495
496 assert( (chdev != NULL), __FUNCTION__ ,
497 "cannot allocate external device" );
498
499 // get extended pointer on chdev
500 chdev_xp = XPTR( local_cxy , chdev );
501
502 // make device type specific initialisation
503 // the number of parameters depends on the device type
504 // TODO : remove the parameters that must be provided by the drivers
505 if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
506 else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
507 else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
508 else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
509 else if( func == DEV_FUNC_PIC ) dev_pic_init( chdev , p0 );
510 else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev , p0 , p1 );
511 else
512 {
513 assert( false , __FUNCTION__ , "undefined device type" );
514 }
515
516 // all external (shared) devices are remotely accessible
517 // initialize the replicated chdev_dir[x][y] structures
518 // defining the extended pointers on chdev descriptors
519 xptr_t * entry;
520
521 if( func == DEV_FUNC_IOB ) entry = &chdev_dir.iob;
522 if( func == DEV_FUNC_PIC ) entry = &chdev_dir.pic;
523 if( func == DEV_FUNC_TXT ) entry = &chdev_dir.txt[channel];
524 if( func == DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
525 if( func == DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
526 if( func == DEV_FUNC_NIC ) entry = &chdev_dir.nic_tx[channel];
527
528 for( x = 0 ; x < info->x_size ; x++ )
529 {
530 for( y = 0 ; y < info->y_size ; y++ )
531 {
532 cxy_t cxy = (x<<info->y_width) + y;
533 hal_remote_swd( XPTR( cxy , entry ) , chdev_xp );
534 }
535 }
536
537 kinit_dmsg("\n[INFO] %s : core[%x][0] create chdev %s[%d] at cycle %d\n",
538 __FUNCTION__ , local_cxy , chdev_func_str( func ),
539 channel , hal_get_cycles() );
540
541 } // end if match
542
543 // increment chdev global index (matching or not)
544 chdev_gid++;
545
546 } // end loop on directions
547
548 } // end loop on channels
549
550 // initialize the entries of the local chdev_pic_input structure
551 // defining how external peripherals are connected to PIC
552 if( func == DEV_FUNC_PIC )
553 {
554 uint32_t id;
555 uint8_t valid;
556 uint32_t dev_type;
557 uint8_t channel;
558 uint8_t is_rx;
559
560 // loop on PIC inputs
561 for( id = 0 ; id < CONFIG_MAX_IRQS_PER_PIC ; id++ )
562 {
563 valid = dev_tbl[i].irq[id].valid;
564 dev_type = dev_tbl[i].irq[id].dev_type;
565 channel = dev_tbl[i].irq[id].channel;
566 is_rx = dev_tbl[i].irq[id].is_rx;
567
568 if( valid ) // only valid inputs are registered
569 {
570 uint32_t * index; // local pointer on one entry
571 uint16_t dev_func = FUNC_FROM_TYPE( dev_type );
572
573 if( dev_func == DEV_FUNC_TXT )
574 {
575 index = &chdev_pic_input.txt[channel];
576 }
577 else if( dev_func == DEV_FUNC_IOC )
578 {
579 index = &chdev_pic_input.ioc[channel];
580 }
581 else if( (dev_func == DEV_FUNC_NIC) && (is_rx == 0) )
582 {
583 index = &chdev_pic_input.nic_tx[channel];
584 }
585 else if( (dev_func == DEV_FUNC_NIC) && (is_rx != 0) )
586 {
587 index = &chdev_pic_input.nic_rx[channel];
588 }
589 else
590 {
591 assert( false , __FUNCTION__ , "illegal source device for PIC input" );
592 }
593
594 // set entry in local structure
595 *index = id;
596 }
597 } // end loop on PIC inputs
598 } // end PIC
599 } // end loop on devices
600} // end external_devices_init()
601
602
603///////////////////////////////////////////////////////////////////////////////////////////
604// This static function returns the identifiers of the calling core.
605///////////////////////////////////////////////////////////////////////////////////////////
606// @ info : pointer on boot_info structure.
607// @ lid : [out] core local index in cluster.
608// @ cxy : [out] cluster identifier.
609// @ lid : [out] core global identifier (hardware).
610// @ return 0 if success / return EINVAL if not found.
611///////////////////////////////////////////////////////////////////////////////////////////
612static error_t get_core_identifiers( boot_info_t * info,
613 lid_t * lid,
614 cxy_t * cxy,
615 gid_t * gid )
616{
617 uint32_t i;
618 gid_t global_id;
619
620 // get global identifier from hardware register
621 global_id = hal_get_gid();
622
623 // makes an associative search in boot_info to get (cxy,lid) from global_id
624 for( i = 0 ; i < info->cores_nr ; i++ )
625 {
626 if( global_id == info->core[i].gid )
627 {
628 *lid = info->core[i].lid;
629 *cxy = info->core[i].cxy;
630 *gid = global_id;
631 return 0;
632 }
633 }
634 return EINVAL;
635}
636
637///////////////////////////////////////////////////////////////////////////////////////////
638// This function is the entry point for the kernel initialisation.
639// It is executed by all cores in all clusters, but only core[0], called CP0,
640// initializes the shared resources such as the cluster manager, or the local peripherals.
641// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
642// only information contained in the local boot_info_t structure, set by the bootloader.
643// Only CP0 in cluster 0 print the log messages.
644///////////////////////////////////////////////////////////////////////////////////////////
645// @ info : pointer on the local boot-info structure.
646///////////////////////////////////////////////////////////////////////////////////////////
647void kernel_init( boot_info_t * info )
648{
649 lid_t core_lid = -1; // running core local index
650 cxy_t core_cxy = -1; // running core cluster identifier
651 gid_t core_gid; // running core hardware identifier
652 cluster_t * cluster; // pointer on local cluster manager
653 core_t * core; // pointer on running core descriptor
654 thread_t * thread; // pointer on idle thread descriptor
655 error_t error;
656
657 // all cores get and check core identifiers
658 error = get_core_identifiers( info,
659 &core_lid,
660 &core_cxy,
661 &core_gid );
662
663 // CP0 initialise cluster identifier
664 if( core_lid == 0 ) local_cxy = info->cxy;
665
666 // each core get pointer on its private idle thread descriptor
667 thread = (thread_t *)( idle_threads + (core_lid * CONFIG_THREAD_DESC_SIZE) );
668
669 // each core registers this thread pointer in hardware register
670 hal_set_current_thread( thread );
671
672 // CP0 in I/O cluster initialises TXT0 chdev descriptor
673 if( (core_lid == 0) && (core_cxy == info->io_cxy) ) txt0_device_init( info );
674
675 /////////////////////////////////////////////////////////////////////////////////
676 // global & local synchro to protect access to TXT0 terminal
677 if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
678 (info->x_size * info->y_size) );
679 barrier_wait( &local_barrier , info->cores_nr );
680 /////////////////////////////////////////////////////////////////////////////////
681
682 if( (core_lid == 0) && (local_cxy == info->io_cxy) )
683 {
684 kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 0 at cycle %d\n",
685 __FUNCTION__ , core_cxy , core_lid , hal_get_cycles() );
686 }
687
688 // all cores check core identifiers
689 if( error )
690 {
691 nolock_printk("\n[PANIC] in %s : illegal core identifiers"
692 " gid = %x / cxy = %x / lid = %d\n",
693 __FUNCTION__ , core_lid , core_cxy , core_lid );
694 hal_core_sleep();
695 }
696
697 // CP0 initializes the local cluster manager (cores and memory allocators)
698 if( core_lid == 0 )
699 {
700 error = cluster_init( info );
701
702 if( error )
703 {
704 nolock_printk("\n[PANIC] in %s : cannot initialise cluster manager in cluster %x",
705 __FUNCTION__ , local_cxy );
706 hal_core_sleep();
707 }
708 }
709
710 /////////////////////////////////////////////////////////////////////////////////
711 // global & local synchro, to protect access to cluster manager
712 if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
713 (info->x_size * info->y_size) );
714 barrier_wait( &local_barrier , info->cores_nr );
715 /////////////////////////////////////////////////////////////////////////////////
716
717 if( (core_lid == 0) && (local_cxy == info->io_cxy) )
718 {
719 kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 1 at cycle %d\n",
720 __FUNCTION__ , core_cxy , core_lid , hal_get_cycles() );
721 }
722
723 // all cores get pointer on local cluster manager and on core descriptor
724 cluster = &cluster_manager;
725 core = &cluster->core_tbl[core_lid];
726
727 // CP0 initializes the process_zero descriptor
728 if( core_lid == 0 ) process_reference_init( &process_zero , 0 , XPTR_NULL );
729
730 // CP0 allocates and initialises the internal peripheral chdev descriptors.
731 // Each CP0[cxy] scan the set of its internal (private) peripherals,
732 // and allocate memory for the corresponding chdev descriptors.
733 if( core_lid == 0 ) internal_devices_init( info );
734
735 // CP0 allocates one WTI mailbbox per core for Inter Processor Interrupt
736 // this must be done after ICU chdev initialisation, by CP0 only, and before
737 // external devices initialisation to enforce the rule :
738 // "The WTI index for the IPI routed to core[lid] is lid"
739 if( core_lid == 1 )
740 {
741 uint32_t wti_id;
742 uint32_t lid;
743 for( lid = 0 ; lid < LOCAL_CLUSTER->cores_nr ; lid++ )
744 {
745 wti_id = dev_icu_wti_alloc();
746
747 if( wti_id != lid )
748 {
749 nolock_printk("\n[PANIC] in %s : WTI index for IPI = %d / core_lid = %d",
750 __FUNCTION__ , wti_id , lid );
751 hal_core_sleep();
752 }
753
754 dev_icu_enable_irq( lid , WTI_TYPE , wti_id , NULL );
755 }
756 }
757
758 // All CP0s contribute to initialise external peripheral chdev descriptors.
759 // Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
760 // and allocates memory for the chdev descriptors that must be placed
761 // on the (cxy) cluster according to the global index value.
762 if( core_lid == 0 ) external_devices_init( info );
763
764 /////////////////////////////////////////////////////////////////////////////////
765 // global &local synchro to protect access to peripherals
766 if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
767 (info->x_size * info->y_size) );
768 barrier_wait( &local_barrier , info->cores_nr );
769 /////////////////////////////////////////////////////////////////////////////////
770
771 if( (core_lid == 0) && (local_cxy == info->io_cxy) )
772 {
773 kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 2 at cycle %d\n",
774 __FUNCTION__ , core_cxy , core_lid , hal_get_cycles() );
775 }
776
777 error = thread_kernel_init( thread,
778 THREAD_IDLE,
779 &thread_idle_func,
780 NULL,
781 core_lid );
782 if( error )
783 {
784 nolock_printk("\n[PANIC] in %s : core[%x][%d] cannot initialize idle thread\n",
785 __FUNCTION__ , local_cxy , core_lid );
786 hal_core_sleep();
787 }
788
789 // register idle thread in scheduler
790 core->scheduler.idle = thread;
791
792 // activate the idle thread
793 thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
794
795 if( (core_lid == 0) && (local_cxy == info->io_cxy) )
796 {
797 kinit_dmsg("\n[INFO] %s : core[%x][%d] created idle thread %x at cycle %d\n",
798 __FUNCTION__ , core_cxy , core_lid , thread , hal_get_cycles());
799 }
800
801 // CP0 in all clusters initializes cooperatively VFS and DEVFS
802 if( (core_lid == 0) )
803 {
804 xptr_t root_inode_xp;
805
806 // initialize root File System (must be FATFS in this implementation)
807 if( CONFIG_VFS_ROOT_IS_FATFS )
808 {
809 root_inode_xp = fatfs_init();
810 }
811 else
812 {
813 nolock_printk("\n[PANIC] in %s : root FS must be FATFS\n", __FUNCTION__ );
814 hal_core_sleep();
815 }
816
817 if( root_inode_xp == XPTR_NULL )
818 {
819 nolock_printk("\n[PANIC] in %s : core[%x][%d] cannot initialize file system\n",
820 __FUNCTION__ , local_cxy , core_lid );
821 hal_core_sleep();
822 }
823
824 // register VFS root inode in process_zero
825 process_zero.vfs_root_xp = root_inode_xp;
826 process_zero.vfs_cwd_xp = root_inode_xp;
827
828 // mount the DEVFS File system
829 devfs_mount( root_inode_xp , "dev" );
830 }
831
832
833 // CP0 in I/O cluster creates the process_init and print banner
834 if( (core_lid == 0) && (local_cxy == info->io_cxy) )
835 {
836 process_init_create();
837
838 print_banner( (info->x_size * info->y_size) , info->cores_nr );
839
840 kinit_dmsg("\n\n*** memory fooprint of main kernet objects ***\n"
841 " - thread descriptor : %d bytes\n"
842 " - process descriptor : %d bytes\n"
843 " - cluster manager : %d bytes\n"
844 " - chdev descriptor : %d bytes\n"
845 " - core descriptor : %d bytes\n"
846 " - scheduler : %d bytes\n"
847 " - rpc fifo : %d bytes\n"
848 " - page descriptor : %d bytes\n"
849 " - mapper root : %d bytes\n"
850 " - ppm manager : %d bytes\n"
851 " - kcm manager : %d bytes\n"
852 " - khm manager : %d bytes\n"
853 " - vmm manager : %d bytes\n"
854 " - gpt root : %d bytes\n"
855 " - list item : %d bytes\n"
856 " - xlist item : %d bytes\n"
857 " - spinlock : %d bytes\n"
858 " - remote spinlock : %d bytes\n"
859 " - rwlock : %d bytes\n"
860 " - remote rwlock : %d bytes\n",
861 sizeof( thread_t ),
862 sizeof( process_t ),
863 sizeof( cluster_t ),
864 sizeof( chdev_t ),
865 sizeof( core_t ),
866 sizeof( scheduler_t ),
867 sizeof( rpc_fifo_t ),
868 sizeof( page_t ),
869 sizeof( mapper_t ),
870 sizeof( ppm_t ),
871 sizeof( kcm_t ),
872 sizeof( khm_t ),
873 sizeof( vmm_t ),
874 sizeof( gpt_t ),
875 sizeof( list_entry_t ),
876 sizeof( xlist_entry_t ),
877 sizeof( spinlock_t ),
878 sizeof( remote_spinlock_t ),
879 sizeof( rwlock_t ),
880 sizeof( remote_rwlock_t ));
881 }
882
883 /////////////////////////////////////////////////////////////////////////////////
884 // global syncho to protect access to File System
885 if( core_lid == 0 ) remote_barrier( XPTR( info->io_cxy , &global_barrier ),
886 (info->x_size * info->y_size) );
887 barrier_wait( &local_barrier , info->cores_nr );
888 /////////////////////////////////////////////////////////////////////////////////
889
890 if( (core_lid == 0) && (local_cxy == info->io_cxy) )
891 {
892 kinit_dmsg("\n[INFO] %s : core[%x][%d] exit barrier 3 at cycle %d\n",
893 __FUNCTION__ , core_cxy , core_lid , hal_get_cycles() );
894 }
895
896 // each core activates its private PTI IRQ
897 dev_icu_set_period( core_lid , CONFIG_SCHED_TICK_PERIOD );
898 dev_icu_enable_irq( core_lid , PTI_TYPE , core_lid , NULL );
899
900 // each core get its private IRQ masks values
901 uint32_t hwi_mask;
902 uint32_t wti_mask;
903 uint32_t pti_mask;
904 dev_icu_get_masks( core_lid , &hwi_mask , &wti_mask , &pti_mask );
905
906 thread_dmsg("\n[INFO] %s : core[%x][%d] complete kernel init at cycle %d\n"
907 " hwi_mask = %x / wti_mask = %x / pti_mask = %x\n",
908 __FUNCTION__ , local_cxy , core_lid , hal_get_cycles() ,
909 hwi_mask , wti_mask , pti_mask );
910
911 // each core jump to idle thread
912 thread_idle_func();
913
914} // end kernel_init()
915
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