source: trunk/kernel/kern/kernel_init.c@ 583

Last change on this file since 583 was 583, checked in by alain, 8 years ago

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1/*
2 * kernel_init.c - kernel parallel initialization
3 *
4 * Authors : Mohamed Lamine Karaoui (2015)
5 * Alain Greiner (2016,2017)
6 *
7 * Copyright (c) Sorbonne Universites
8 *
9 * This file is part of ALMOS-MKH.
10 *
11 * ALMOS-MKH is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; version 2.0 of the License.
14 *
15 * ALMOS-MKH is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include <kernel_config.h>
26#include <errno.h>
27#include <hal_kernel_types.h>
28#include <hal_special.h>
29#include <hal_context.h>
30#include <hal_irqmask.h>
31#include <hal_macros.h>
32#include <hal_ppm.h>
33#include <barrier.h>
34#include <xbarrier.h>
35#include <remote_fifo.h>
36#include <core.h>
37#include <list.h>
38#include <xlist.h>
39#include <xhtab.h>
40#include <thread.h>
41#include <scheduler.h>
42#include <kmem.h>
43#include <cluster.h>
44#include <string.h>
45#include <memcpy.h>
46#include <ppm.h>
47#include <page.h>
48#include <chdev.h>
49#include <boot_info.h>
50#include <dqdt.h>
51#include <dev_mmc.h>
52#include <dev_dma.h>
53#include <dev_iob.h>
54#include <dev_ioc.h>
55#include <dev_txt.h>
56#include <dev_pic.h>
57#include <printk.h>
58#include <vfs.h>
59#include <devfs.h>
60#include <mapper.h>
61
62///////////////////////////////////////////////////////////////////////////////////////////
63// All the following global variables are replicated in all clusters.
64// They are initialised by the kernel_init() function.
65//
66// WARNING : The section names have been defined to control the base addresses of the
67// boot_info structure and the idle thread descriptors, through the kernel.ld script:
68// - the boot_info structure is built by the bootloader, and used by kernel_init.
69// it must be the first object in the kdata segment.
70// - the array of idle threads descriptors must be placed on the first page boundary after
71// the boot_info structure in the kdata segment.
72///////////////////////////////////////////////////////////////////////////////////////////
73
74// This variable defines the local boot_info structure
75__attribute__((section(".kinfo")))
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 variable defines the TXT_TX[0] chdev
88__attribute__((section(".kdata")))
89chdev_t txt0_tx_chdev CONFIG_CACHE_LINE_ALIGNED;
90
91// This variable defines the TXT_RX[0] chdev
92__attribute__((section(".kdata")))
93chdev_t txt0_rx_chdev CONFIG_CACHE_LINE_ALIGNED;
94
95// This variables define the kernel process0 descriptor
96__attribute__((section(".kdata")))
97process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
98
99// This variable defines extended pointers on the distributed chdevs
100__attribute__((section(".kdata")))
101chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
102
103// This variable contains the input IRQ indexes for the IOPIC controller
104__attribute__((section(".kdata")))
105iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
106
107// This variable contains the input IRQ indexes for the LAPIC controller
108__attribute__((section(".kdata")))
109lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
110
111// This variable defines the local cluster identifier
112__attribute__((section(".kdata")))
113cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
114
115// This variable is used for CP0 cores synchronisation in kernel_init()
116__attribute__((section(".kdata")))
117xbarrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119// This variable is used for local cores synchronisation in kernel_init()
120__attribute__((section(".kdata")))
121barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
122
123// This variable defines the array of supported File System contexts
124__attribute__((section(".kdata")))
125vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
126
127// kernel_init is the entry point defined in hal/tsar_mips32/kernel.ld
128// It is used by the bootloader.
129extern void kernel_init( boot_info_t * info );
130
131// This array is used for debug, and describes the kernel locks usage,
132// It must be kept consistent with the defines in kernel_config.h file.
133char * lock_type_str[] =
134{
135 "unused_0", // 0
136
137 "CLUSTER_KCM", // 1
138 "PPM_FREE", // 2
139 "SCHED_STATE", // 3
140 "VMM_STACK", // 4
141 "VMM_MMAP", // 5
142 "VFS_CTX", // 6
143 "KCM_STATE", // 7
144 "KHM_STATE", // 8
145 "HTAB_STATE", // 9
146
147 "THREAD_JOIN", // 10
148 "VFS_MAIN", // 11
149 "CHDEV_QUEUE", // 12
150 "CHDEV_TXT0", // 13
151 "CHDEV_TXTLIST", // 14
152 "PAGE_STATE", // 15
153 "MUTEX_STATE", // 16
154 "CONDVAR_STATE", // 17
155 "SEM_STATE", // 18
156 "XHTAB_STATE", // 19
157
158 "unused_20", // 20
159
160 "CLUSTER_PREFTBL", // 21
161 "PPM_DIRTY", // 22
162
163 "CLUSTER_LOCALS", // 23
164 "CLUSTER_COPIES", // 24
165 "PROCESS_CHILDREN", // 25
166 "PROCESS_USERSYNC", // 26
167 "PROCESS_FDARRAY", // 27
168
169 "MAPPER_STATE", // 28
170 "PROCESS_THTBL", // 29
171
172 "PROCESS_CWD", // 30
173 "VFS_INODE", // 31
174 "VFS_FILE", // 32
175 "VMM_VSL", // 33
176 "VMM_GPT", // 34
177};
178
179// these debug variables are used to analyse the sys_read() and sys_write() syscalls timing
180
181#if DEBUG_SYS_READ
182uint32_t enter_sys_read;
183uint32_t exit_sys_read;
184
185uint32_t enter_devfs_read;
186uint32_t exit_devfs_read;
187
188uint32_t enter_txt_read;
189uint32_t exit_txt_read;
190
191uint32_t enter_chdev_cmd_read;
192uint32_t exit_chdev_cmd_read;
193
194uint32_t enter_chdev_server_read;
195uint32_t exit_chdev_server_read;
196
197uint32_t enter_tty_cmd_read;
198uint32_t exit_tty_cmd_read;
199
200uint32_t enter_tty_isr_read;
201uint32_t exit_tty_isr_read;
202#endif
203
204// these debug variables are used to analyse the sys_write() syscall timing
205
206#if DEBUG_SYS_WRITE
207uint32_t enter_sys_write;
208uint32_t exit_sys_write;
209
210uint32_t enter_devfs_write;
211uint32_t exit_devfs_write;
212
213uint32_t enter_txt_write;
214uint32_t exit_txt_write;
215
216uint32_t enter_chdev_cmd_write;
217uint32_t exit_chdev_cmd_write;
218
219uint32_t enter_chdev_server_write;
220uint32_t exit_chdev_server_write;
221
222uint32_t enter_tty_cmd_write;
223uint32_t exit_tty_cmd_write;
224
225uint32_t enter_tty_isr_write;
226uint32_t exit_tty_isr_write;
227#endif
228
229// intrumentation variables : cumulated costs per syscall type in cluster
230uint32_t syscalls_cumul_cost[SYSCALLS_NR];
231
232// intrumentation variables : number of syscalls per syscal type in cluster
233uint32_t syscalls_occurences[SYSCALLS_NR];
234
235///////////////////////////////////////////////////////////////////////////////////////////
236// This function displays the ALMOS_MKH banner.
237///////////////////////////////////////////////////////////////////////////////////////////
238static void print_banner( uint32_t nclusters , uint32_t ncores )
239{
240 printk("\n"
241 " _ __ __ _____ ______ __ __ _ __ _ _ \n"
242 " /\\ | | | \\ / | / ___ \\ / _____| | \\ / | | | / / | | | | \n"
243 " / \\ | | | \\/ | | / \\ | | / | \\/ | | |/ / | | | | \n"
244 " / /\\ \\ | | | |\\ /| | | | | | | |_____ ___ | |\\ /| | | / | |___| | \n"
245 " / /__\\ \\ | | | | \\/ | | | | | | \\_____ \\ |___| | | \\/ | | | \\ | ___ | \n"
246 " / ______ \\ | | | | | | | | | | | | | | | | | |\\ \\ | | | | \n"
247 " / / \\ \\ | |____ | | | | | \\___/ | _____/ | | | | | | | \\ \\ | | | | \n"
248 " /_/ \\_\\ |______| |_| |_| \\_____/ |______/ |_| |_| |_| \\_\\ |_| |_| \n"
249 "\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
250 "\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
251 CONFIG_ALMOS_VERSION , nclusters , ncores );
252}
253
254
255///////////////////////////////////////////////////////////////////////////////////////////
256// This function initializes the TXT_TX[0] and TXT_RX[0] chdev descriptors, implementing
257// the "kernel terminal", shared by all kernel instances for debug messages.
258// These chdev are implemented as global variables (replicated in all clusters),
259// because this terminal is used before the kmem allocator initialisation, but only
260// the chdevs in cluster 0 are registered in the "chdev_dir" directory.
261// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
262// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
263// Note: The TXT_RX[0] chdev is created, but is not used by ALMOS-MKH (september 2018).
264///////////////////////////////////////////////////////////////////////////////////////////
265// @ info : pointer on the local boot-info structure.
266///////////////////////////////////////////////////////////////////////////////////////////
267static void __attribute__ ((noinline)) txt0_device_init( boot_info_t * info )
268{
269 boot_device_t * dev_tbl; // pointer on array of devices in boot_info
270 uint32_t dev_nr; // actual number of devices in this cluster
271 xptr_t base; // remote pointer on segment base
272 uint32_t func; // device functional index
273 uint32_t impl; // device implementation index
274 uint32_t i; // device index in dev_tbl
275 uint32_t x; // X cluster coordinate
276 uint32_t y; // Y cluster coordinate
277 uint32_t channels; // number of channels
278
279 // get number of peripherals and base of devices array from boot_info
280 dev_nr = info->ext_dev_nr;
281 dev_tbl = info->ext_dev;
282
283 // loop on external peripherals to find TXT device
284 for( i = 0 ; i < dev_nr ; i++ )
285 {
286 base = dev_tbl[i].base;
287 func = FUNC_FROM_TYPE( dev_tbl[i].type );
288 impl = IMPL_FROM_TYPE( dev_tbl[i].type );
289 channels = dev_tbl[i].channels;
290
291 if (func == DEV_FUNC_TXT )
292 {
293 // initialize TXT_TX[0] chdev
294 txt0_tx_chdev.func = func;
295 txt0_tx_chdev.impl = impl;
296 txt0_tx_chdev.channel = 0;
297 txt0_tx_chdev.base = base;
298 txt0_tx_chdev.is_rx = false;
299 remote_busylock_init( XPTR( local_cxy , &txt0_tx_chdev.wait_lock ),
300 LOCK_CHDEV_TXT0 );
301
302 // initialize TXT_RX[0] chdev
303 txt0_rx_chdev.func = func;
304 txt0_rx_chdev.impl = impl;
305 txt0_rx_chdev.channel = 0;
306 txt0_rx_chdev.base = base;
307 txt0_rx_chdev.is_rx = true;
308 remote_busylock_init( XPTR( local_cxy , &txt0_rx_chdev.wait_lock ),
309 LOCK_CHDEV_TXT0 );
310
311 // make TXT specific initialisations
312 dev_txt_init( &txt0_tx_chdev );
313 dev_txt_init( &txt0_rx_chdev );
314
315 // register TXT_TX[0] & TXT_RX[0] in chdev_dir[x][y]
316 // for all valid clusters
317 for( x = 0 ; x < info->x_size ; x++ )
318 {
319 for( y = 0 ; y < info->y_size ; y++ )
320 {
321 cxy_t cxy = HAL_CXY_FROM_XY( x , y );
322
323 if( cluster_is_active( cxy ) )
324 {
325 hal_remote_s64( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
326 XPTR( local_cxy , &txt0_tx_chdev ) );
327 hal_remote_s64( XPTR( cxy , &chdev_dir.txt_rx[0] ) ,
328 XPTR( local_cxy , &txt0_rx_chdev ) );
329 }
330 }
331 }
332
333 hal_fence();
334 }
335 } // end loop on devices
336} // end txt0_device_init()
337
338///////////////////////////////////////////////////////////////////////////////////////////
339// This function allocates memory and initializes the chdev descriptors for the internal
340// peripherals contained in the local cluster, other than the LAPIC, as specified by
341// the boot_info, including the linking with the driver for the specified implementation.
342// The relevant entries in all copies of the devices directory are initialised.
343///////////////////////////////////////////////////////////////////////////////////////////
344// @ info : pointer on the local boot-info structure.
345///////////////////////////////////////////////////////////////////////////////////////////
346static void __attribute__ ((noinline)) internal_devices_init( boot_info_t * info )
347{
348 boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
349 uint32_t dev_nr; // actual number of devices in this cluster
350 xptr_t base; // remote pointer on segment base
351 uint32_t func; // device functionnal index
352 uint32_t impl; // device implementation index
353 uint32_t i; // device index in dev_tbl
354 uint32_t x; // X cluster coordinate
355 uint32_t y; // Y cluster coordinate
356 uint32_t channels; // number of channels
357 uint32_t channel; // channel index
358 chdev_t * chdev_ptr; // local pointer on created chdev
359
360 // get number of internal peripherals and base from boot_info
361 dev_nr = info->int_dev_nr;
362 dev_tbl = info->int_dev;
363
364 // loop on internal peripherals
365 for( i = 0 ; i < dev_nr ; i++ )
366 {
367 base = dev_tbl[i].base;
368 channels = dev_tbl[i].channels;
369 func = FUNC_FROM_TYPE( dev_tbl[i].type );
370 impl = IMPL_FROM_TYPE( dev_tbl[i].type );
371
372 //////////////////////////
373 if( func == DEV_FUNC_MMC )
374 {
375
376 // check channels
377 if( channels != 1 )
378 {
379 printk("\n[PANIC] in %s : MMC device must be single channel\n",
380 __FUNCTION__ );
381 hal_core_sleep();
382 }
383
384 // create chdev in local cluster
385 chdev_ptr = chdev_create( func,
386 impl,
387 0, // channel
388 false, // direction
389 base );
390
391 // check memory
392 if( chdev_ptr == NULL )
393 {
394 printk("\n[PANIC] in %s : cannot create MMC chdev\n",
395 __FUNCTION__ );
396 hal_core_sleep();
397 }
398
399 // make MMC specific initialisation
400 dev_mmc_init( chdev_ptr );
401
402 // set the MMC field in all chdev_dir[x][y] structures
403 for( x = 0 ; x < info->x_size ; x++ )
404 {
405 for( y = 0 ; y < info->y_size ; y++ )
406 {
407 cxy_t cxy = HAL_CXY_FROM_XY( x , y );
408
409 if( cluster_is_active( cxy ) )
410 {
411 hal_remote_s64( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
412 XPTR( local_cxy , chdev_ptr ) );
413 }
414 }
415 }
416
417#if( DEBUG_KERNEL_INIT & 0x1 )
418if( hal_time_stamp() > DEBUG_KERNEL_INIT )
419printk("\n[DBG] %s : created MMC in cluster %x / chdev = %x\n",
420__FUNCTION__ , local_cxy , chdev_ptr );
421#endif
422 }
423 ///////////////////////////////
424 else if( func == DEV_FUNC_DMA )
425 {
426 // create one chdev per channel in local cluster
427 for( channel = 0 ; channel < channels ; channel++ )
428 {
429 // create chdev[channel] in local cluster
430 chdev_ptr = chdev_create( func,
431 impl,
432 channel,
433 false, // direction
434 base );
435
436 // check memory
437 if( chdev_ptr == NULL )
438 {
439 printk("\n[PANIC] in %s : cannot create DMA chdev\n",
440 __FUNCTION__ );
441 hal_core_sleep();
442 }
443
444 // make DMA specific initialisation
445 dev_dma_init( chdev_ptr );
446
447 // initialize only the DMA[channel] field in the local chdev_dir[x][y]
448 // structure because the DMA device is not remotely accessible.
449 chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
450
451#if( DEBUG_KERNEL_INIT & 0x1 )
452if( hal_time_stamp() > DEBUG_KERNEL_INIT )
453printk("\n[DBG] %s : created DMA[%d] in cluster %x / chdev = %x\n",
454__FUNCTION__ , channel , local_cxy , chdev_ptr );
455#endif
456 }
457 }
458 }
459} // end internal_devices_init()
460
461///////////////////////////////////////////////////////////////////////////////////////////
462// This function allocates memory and initializes the chdev descriptors for the
463// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
464// This includes the dynamic linking with the driver for the specified implementation.
465// These chdev descriptors are distributed on all clusters, using a modulo on a global
466// index, identically computed in all clusters.
467// This function is executed in all clusters by the CP0 core, that computes a global index
468// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
469// the local cluster, because the global index matches the local index.
470// The relevant entries in all copies of the devices directory are initialised.
471///////////////////////////////////////////////////////////////////////////////////////////
472// @ info : pointer on the local boot-info structure.
473///////////////////////////////////////////////////////////////////////////////////////////
474static void external_devices_init( boot_info_t * info )
475{
476 boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
477 uint32_t dev_nr; // actual number of external devices
478 xptr_t base; // remote pointer on segment base
479 uint32_t func; // device functionnal index
480 uint32_t impl; // device implementation index
481 uint32_t i; // device index in dev_tbl
482 uint32_t x; // X cluster coordinate
483 uint32_t y; // Y cluster coordinate
484 uint32_t channels; // number of channels
485 uint32_t channel; // channel index
486 uint32_t directions; // number of directions (1 or 2)
487 uint32_t rx; // direction index (0 or 1)
488 chdev_t * chdev; // local pointer on one channel_device descriptor
489 uint32_t ext_chdev_gid; // global index of external chdev
490
491 // get number of peripherals and base of devices array from boot_info
492 dev_nr = info->ext_dev_nr;
493 dev_tbl = info->ext_dev;
494
495 // initializes global index (PIC is already placed in cluster 0
496 ext_chdev_gid = 1;
497
498 // loop on external peripherals
499 for( i = 0 ; i < dev_nr ; i++ )
500 {
501 base = dev_tbl[i].base;
502 channels = dev_tbl[i].channels;
503 func = FUNC_FROM_TYPE( dev_tbl[i].type );
504 impl = IMPL_FROM_TYPE( dev_tbl[i].type );
505
506 // There is one chdev per direction for NIC and for TXT
507 if((func == DEV_FUNC_NIC) || (func == DEV_FUNC_TXT)) directions = 2;
508 else directions = 1;
509
510 // do nothing for ROM, that does not require a device descriptor.
511 if( func == DEV_FUNC_ROM ) continue;
512
513 // do nothing for PIC, that is already initialized
514 if( func == DEV_FUNC_PIC ) continue;
515
516 // check PIC device initialized
517 if( chdev_dir.pic == XPTR_NULL )
518 {
519 printk("\n[PANIC] in %s : PIC device must be initialized first\n",
520 __FUNCTION__ );
521 hal_core_sleep();
522 }
523
524 // check external device functionnal type
525 if( (func != DEV_FUNC_IOB) && (func != DEV_FUNC_IOC) && (func != DEV_FUNC_TXT) &&
526 (func != DEV_FUNC_NIC) && (func != DEV_FUNC_FBF) )
527 {
528 printk("\n[PANIC] in %s : undefined peripheral type\n",
529 __FUNCTION__ );
530 hal_core_sleep();
531 }
532
533 // loops on channels
534 for( channel = 0 ; channel < channels ; channel++ )
535 {
536 // loop on directions
537 for( rx = 0 ; rx < directions ; rx++ )
538 {
539 // skip TXT0 that has already been initialized
540 if( (func == DEV_FUNC_TXT) && (channel == 0) ) continue;
541
542 // all kernel instances compute the target cluster for all chdevs,
543 // computing the global index ext_chdev_gid[func,channel,direction]
544 cxy_t target_cxy;
545 while( 1 )
546 {
547 uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
548 uint32_t x = offset / info->y_size;
549 uint32_t y = offset % info->y_size;
550
551 target_cxy = HAL_CXY_FROM_XY( x , y );
552
553 // exit loop if target cluster is active
554 if( cluster_is_active( target_cxy ) ) break;
555
556 // increment global index otherwise
557 ext_chdev_gid++;
558 }
559
560 // allocate and initialize a local chdev
561 // when local cluster matches target cluster
562 if( target_cxy == local_cxy )
563 {
564 chdev = chdev_create( func,
565 impl,
566 channel,
567 rx, // direction
568 base );
569
570 if( chdev == NULL )
571 {
572 printk("\n[PANIC] in %s : cannot allocate chdev\n",
573 __FUNCTION__ );
574 hal_core_sleep();
575 }
576
577 // make device type specific initialisation
578 if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
579 else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
580 else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
581 else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
582 else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
583
584 // all external (shared) devices are remotely accessible
585 // initialize the replicated chdev_dir[x][y] structures
586 // defining the extended pointers on chdev descriptors
587 xptr_t * entry;
588
589 if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
590 if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
591 if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
592 if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
593 if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
594 if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
595 if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
596
597 for( x = 0 ; x < info->x_size ; x++ )
598 {
599 for( y = 0 ; y < info->y_size ; y++ )
600 {
601 cxy_t cxy = HAL_CXY_FROM_XY( x , y );
602
603 if( cluster_is_active( cxy ) )
604 {
605 hal_remote_s64( XPTR( cxy , entry ),
606 XPTR( local_cxy , chdev ) );
607 }
608 }
609 }
610
611#if( DEBUG_KERNEL_INIT & 0x1 )
612if( hal_time_stamp() > DEBUG_KERNEL_INIT )
613printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
614__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
615#endif
616 } // end if match
617
618 // increment chdev global index (matching or not)
619 ext_chdev_gid++;
620
621 } // end loop on directions
622 } // end loop on channels
623 } // end loop on devices
624} // end external_devices_init()
625
626///////////////////////////////////////////////////////////////////////////////////////////
627// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
628// device, namely the informations attached to the external IOPIC controller, that
629// must be replicated in all clusters (struct iopic_input).
630// This initialisation must be done before other devices initialisation because the IRQ
631// routing infrastructure is required for both internal and external devices init.
632///////////////////////////////////////////////////////////////////////////////////////////
633// @ info : pointer on the local boot-info structure.
634///////////////////////////////////////////////////////////////////////////////////////////
635static void __attribute__ ((noinline)) iopic_init( boot_info_t * info )
636{
637 boot_device_t * dev_tbl; // pointer on boot_info external devices array
638 uint32_t dev_nr; // actual number of external devices
639 xptr_t base; // remote pointer on segment base
640 uint32_t func; // device functionnal index
641 uint32_t impl; // device implementation index
642 uint32_t i; // device index in dev_tbl
643 uint32_t x; // cluster X coordinate
644 uint32_t y; // cluster Y coordinate
645 bool_t found; // IOPIC found
646 chdev_t * chdev; // pointer on PIC chdev descriptor
647
648 // get number of external peripherals and base of array from boot_info
649 dev_nr = info->ext_dev_nr;
650 dev_tbl = info->ext_dev;
651
652 // avoid GCC warning
653 base = XPTR_NULL;
654 impl = 0;
655
656 // loop on external peripherals to get the IOPIC
657 for( i = 0 , found = false ; i < dev_nr ; i++ )
658 {
659 func = FUNC_FROM_TYPE( dev_tbl[i].type );
660
661 if( func == DEV_FUNC_PIC )
662 {
663 base = dev_tbl[i].base;
664 impl = IMPL_FROM_TYPE( dev_tbl[i].type );
665 found = true;
666 break;
667 }
668 }
669
670 // check PIC existence
671 if( found == false )
672 {
673 printk("\n[PANIC] in %s : PIC device not found\n",
674 __FUNCTION__ );
675 hal_core_sleep();
676 }
677
678 // allocate and initialize the PIC chdev in cluster 0
679 chdev = chdev_create( DEV_FUNC_PIC,
680 impl,
681 0, // channel
682 0, // direction,
683 base );
684
685 // check memory
686 if( chdev == NULL )
687 {
688 printk("\n[PANIC] in %s : no memory for PIC chdev\n",
689 __FUNCTION__ );
690 hal_core_sleep();
691 }
692
693 // make PIC device type specific initialisation
694 dev_pic_init( chdev );
695
696 // register, in all clusters, the extended pointer
697 // on PIC chdev in "chdev_dir" array
698 xptr_t * entry = &chdev_dir.pic;
699
700 for( x = 0 ; x < info->x_size ; x++ )
701 {
702 for( y = 0 ; y < info->y_size ; y++ )
703 {
704 cxy_t cxy = HAL_CXY_FROM_XY( x , y );
705
706 if( cluster_is_active( cxy ) )
707 {
708 hal_remote_s64( XPTR( cxy , entry ) ,
709 XPTR( local_cxy , chdev ) );
710 }
711 }
712 }
713
714 // initialize, in all clusters, the "iopic_input" structure
715 // defining how external IRQs are connected to IOPIC
716
717 // register default value for unused inputs
718 for( x = 0 ; x < info->x_size ; x++ )
719 {
720 for( y = 0 ; y < info->y_size ; y++ )
721 {
722 cxy_t cxy = HAL_CXY_FROM_XY( x , y );
723
724 if( cluster_is_active( cxy ) )
725 {
726 hal_remote_memset( XPTR( cxy , &iopic_input ),
727 0xFF , sizeof(iopic_input_t) );
728 }
729 }
730 }
731
732 // register input IRQ index for valid inputs
733 uint32_t id; // input IRQ index
734 uint8_t valid; // input IRQ is connected
735 uint32_t type; // source device type
736 uint8_t channel; // source device channel
737 uint8_t is_rx; // source device direction
738 uint32_t * ptr = NULL; // local pointer on one field in iopic_input stucture
739
740 for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
741 {
742 valid = dev_tbl[i].irq[id].valid;
743 type = dev_tbl[i].irq[id].dev_type;
744 channel = dev_tbl[i].irq[id].channel;
745 is_rx = dev_tbl[i].irq[id].is_rx;
746 func = FUNC_FROM_TYPE( type );
747
748 // get pointer on relevant field in iopic_input
749 if( valid )
750 {
751 if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
752 else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
753 else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
754 else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
755 else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
756 else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
757 else
758 {
759 printk("\n[PANIC] in %s : illegal source device for IOPIC input\n",
760 __FUNCTION__ );
761 hal_core_sleep();
762 }
763
764 // set one entry in all "iopic_input" structures
765 for( x = 0 ; x < info->x_size ; x++ )
766 {
767 for( y = 0 ; y < info->y_size ; y++ )
768 {
769 cxy_t cxy = HAL_CXY_FROM_XY( x , y );
770
771 if( cluster_is_active( cxy ) )
772 {
773 hal_remote_s64( XPTR( cxy , ptr ) , id );
774 }
775 }
776 }
777 }
778 }
779
780#if( DEBUG_KERNEL_INIT & 0x1 )
781if( hal_tim_stamp() > DEBUG_KERNEL_INIT )
782{
783 printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
784 __FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
785 dev_pic_inputs_display();
786}
787#endif
788
789} // end iopic_init()
790
791///////////////////////////////////////////////////////////////////////////////////////////
792// This function is called by all CP0s in all cluster to complete the PIC device
793// initialisation, namely the informations attached to the LAPIC controller.
794// This initialisation must be done after the IOPIC initialisation, but before other
795// devices initialisation because the IRQ routing infrastructure is required for both
796// internal and external devices initialisation.
797///////////////////////////////////////////////////////////////////////////////////////////
798// @ info : pointer on the local boot-info structure.
799///////////////////////////////////////////////////////////////////////////////////////////
800static void __attribute__ ((noinline)) lapic_init( boot_info_t * info )
801{
802 boot_device_t * dev_tbl; // pointer on boot_info internal devices array
803 uint32_t dev_nr; // number of internal devices
804 uint32_t i; // device index in dev_tbl
805 xptr_t base; // remote pointer on segment base
806 uint32_t func; // device functionnal type in boot_info
807 bool_t found; // LAPIC found
808
809 // get number of internal peripherals and base
810 dev_nr = info->int_dev_nr;
811 dev_tbl = info->int_dev;
812
813 // loop on internal peripherals to get the lapic device
814 for( i = 0 , found = false ; i < dev_nr ; i++ )
815 {
816 func = FUNC_FROM_TYPE( dev_tbl[i].type );
817
818 if( func == DEV_FUNC_ICU )
819 {
820 base = dev_tbl[i].base;
821 found = true;
822 break;
823 }
824 }
825
826 // if the LAPIC controller is not defined in the boot_info,
827 // we simply don't initialize the PIC extensions in the kernel,
828 // making the assumption that the LAPIC related informations
829 // are hidden in the hardware specific PIC driver.
830 if( found )
831 {
832 // initialise the PIC extensions for
833 // the core descriptor and core manager extensions
834 dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
835
836 // initialize the "lapic_input" structure
837 // defining how internal IRQs are connected to LAPIC
838 uint32_t id;
839 uint8_t valid;
840 uint8_t channel;
841 uint32_t func;
842
843 for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
844 {
845 valid = dev_tbl[i].irq[id].valid;
846 func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
847 channel = dev_tbl[i].irq[id].channel;
848
849 if( valid ) // only valid local IRQs are registered
850 {
851 if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
852 else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
853 else
854 {
855 printk("\n[PANIC] in %s : illegal source device for LAPIC input\n",
856 __FUNCTION__ );
857 hal_core_sleep();
858 }
859 }
860 }
861 }
862} // end lapic_init()
863
864///////////////////////////////////////////////////////////////////////////////////////////
865// This static function returns the identifiers of the calling core.
866///////////////////////////////////////////////////////////////////////////////////////////
867// @ info : pointer on boot_info structure.
868// @ lid : [out] core local index in cluster.
869// @ cxy : [out] cluster identifier.
870// @ lid : [out] core global identifier (hardware).
871// @ return 0 if success / return EINVAL if not found.
872///////////////////////////////////////////////////////////////////////////////////////////
873static error_t __attribute__ ((noinline)) get_core_identifiers( boot_info_t * info,
874 lid_t * lid,
875 cxy_t * cxy,
876 gid_t * gid )
877{
878 uint32_t i;
879 gid_t global_id;
880
881 // get global identifier from hardware register
882 global_id = hal_get_gid();
883
884 // makes an associative search in boot_info to get (cxy,lid) from global_id
885 for( i = 0 ; i < info->cores_nr ; i++ )
886 {
887 if( global_id == info->core[i].gid )
888 {
889 *lid = info->core[i].lid;
890 *cxy = info->core[i].cxy;
891 *gid = global_id;
892 return 0;
893 }
894 }
895 return EINVAL;
896}
897
898///////////////////////////////////////////////////////////////////////////////////////////
899// This function is the entry point for the kernel initialisation.
900// It is executed by all cores in all clusters, but only core[0], called CP0,
901// initializes the shared resources such as the cluster manager, or the local peripherals.
902// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
903// only information contained in the local boot_info_t structure, set by the bootloader.
904// Only CP0 in cluster 0 print the log messages.
905///////////////////////////////////////////////////////////////////////////////////////////
906// @ info : pointer on the local boot-info structure.
907///////////////////////////////////////////////////////////////////////////////////////////
908void kernel_init( boot_info_t * info )
909{
910 lid_t core_lid = -1; // running core local index
911 cxy_t core_cxy = -1; // running core cluster identifier
912 gid_t core_gid; // running core hardware identifier
913 cluster_t * cluster; // pointer on local cluster manager
914 core_t * core; // pointer on running core descriptor
915 thread_t * thread; // pointer on idle thread descriptor
916
917 xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
918 xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
919 xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
920 xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
921
922 error_t error;
923 reg_t status; // running core status register
924
925 /////////////////////////////////////////////////////////////////////////////////
926 // STEP 0 : Each core get its core identifier from boot_info, and makes
927 // a partial initialisation of its private idle thread descriptor.
928 // CP0 initializes the "local_cxy" global variable.
929 // CP0 in cluster IO initializes the TXT0 chdev to print log messages.
930 /////////////////////////////////////////////////////////////////////////////////
931
932 error = get_core_identifiers( info,
933 &core_lid,
934 &core_cxy,
935 &core_gid );
936
937 // all CP0s initialize cluster identifier
938 if( core_lid == 0 ) local_cxy = info->cxy;
939
940 // each core gets a pointer on its private idle thread descriptor
941 thread = (thread_t *)( idle_threads + (core_lid * CONFIG_THREAD_DESC_SIZE) );
942
943 // each core registers this thread pointer in hardware register
944 hal_set_current_thread( thread );
945
946 // each core register core descriptor pointer in idle thread descriptor
947 thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
948
949 // each core initializes the idle thread locks counters
950 thread->busylocks = 0;
951
952#if DEBUG_BUSYLOCK
953 // each core initialise the idle thread list of busylocks
954 xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
955#endif
956
957 // all CP0s initialize cluster info
958 if( core_lid == 0 ) cluster_info_init( info );
959
960 // CP0 in cluster 0 initialises TXT0 chdev descriptor
961 if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
962
963 /////////////////////////////////////////////////////////////////////////////////
964 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
965 (info->x_size * info->y_size) );
966 barrier_wait( &local_barrier , info->cores_nr );
967 /////////////////////////////////////////////////////////////////////////////////
968
969#if DEBUG_KERNEL_INIT
970if( (core_lid == 0) & (local_cxy == 0) )
971printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / sr %x / cycle %d\n",
972__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
973#endif
974
975 /////////////////////////////////////////////////////////////////////////////
976 // STEP 1 : all cores check core identifier.
977 // CP0 initializes the local cluster manager.
978 // This includes the memory allocators.
979 /////////////////////////////////////////////////////////////////////////////
980
981 // all cores check identifiers
982 if( error )
983 {
984 printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
985 __FUNCTION__, core_lid, core_cxy, core_lid );
986 hal_core_sleep();
987 }
988
989 // all CP0s initialise DQDT (only CPO in cluster 0 build the quad-tree)
990 if( core_lid == 0 ) dqdt_init();
991
992 // all CP0s initialize other cluster manager complex structures
993 if( core_lid == 0 )
994 {
995 error = cluster_manager_init( info );
996
997 if( error )
998 {
999 printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1000 __FUNCTION__, local_cxy );
1001 hal_core_sleep();
1002 }
1003 }
1004
1005 /////////////////////////////////////////////////////////////////////////////////
1006 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1007 (info->x_size * info->y_size) );
1008 barrier_wait( &local_barrier , info->cores_nr );
1009 /////////////////////////////////////////////////////////////////////////////////
1010
1011#if DEBUG_KERNEL_INIT
1012if( (core_lid == 0) & (local_cxy == 0) )
1013printk("\n[DBG] %s : exit barrier 1 : clusters initialised / sr %x / cycle %d\n",
1014__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1015#endif
1016
1017 /////////////////////////////////////////////////////////////////////////////////
1018 // STEP 2 : CP0 initializes the process_zero descriptor.
1019 // CP0 in cluster 0 initializes the IOPIC device.
1020 /////////////////////////////////////////////////////////////////////////////////
1021
1022 // all cores get pointer on local cluster manager & core descriptor
1023 cluster = &cluster_manager;
1024 core = &cluster->core_tbl[core_lid];
1025
1026 // all CP0s initialize the process_zero descriptor
1027 if( core_lid == 0 ) process_zero_create( &process_zero );
1028
1029 // CP0 in cluster 0 initializes the PIC chdev,
1030 if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1031
1032 ////////////////////////////////////////////////////////////////////////////////
1033 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1034 (info->x_size * info->y_size) );
1035 barrier_wait( &local_barrier , info->cores_nr );
1036 ////////////////////////////////////////////////////////////////////////////////
1037
1038#if DEBUG_KERNEL_INIT
1039if( (core_lid == 0) & (local_cxy == 0) )
1040printk("\n[DBG] %s : exit barrier 2 : PIC initialised / sr %x / cycle %d\n",
1041__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1042#endif
1043
1044 ////////////////////////////////////////////////////////////////////////////////
1045 // STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
1046 // CP0 initializes the internal chdev descriptors
1047 // CP0 initialize the local external chdev descriptors
1048 ////////////////////////////////////////////////////////////////////////////////
1049
1050 // all CP0s initialize their local LAPIC extension,
1051 if( core_lid == 0 ) lapic_init( info );
1052
1053 // CP0 scan the internal (private) peripherals,
1054 // and allocates memory for the corresponding chdev descriptors.
1055 if( core_lid == 0 ) internal_devices_init( info );
1056
1057
1058 // All CP0s contribute to initialise external peripheral chdev descriptors.
1059 // Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
1060 // and allocates memory for the chdev descriptors that must be placed
1061 // on the (cxy) cluster according to the global index value.
1062
1063 if( core_lid == 0 ) external_devices_init( info );
1064
1065 /////////////////////////////////////////////////////////////////////////////////
1066 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1067 (info->x_size * info->y_size) );
1068 barrier_wait( &local_barrier , info->cores_nr );
1069 /////////////////////////////////////////////////////////////////////////////////
1070
1071#if DEBUG_KERNEL_INIT
1072if( (core_lid == 0) & (local_cxy == 0) )
1073printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / sr %x / cycle %d\n",
1074__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1075#endif
1076
1077#if( DEBUG_KERNEL_INIT & 1 )
1078if( (core_lid == 0) & (local_cxy == 0) )
1079chdev_dir_display();
1080#endif
1081
1082 /////////////////////////////////////////////////////////////////////////////////
1083 // STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
1084 // Alh cores initialize IDLE thread.
1085 // Only CP0 in cluster 0 creates the VFS root inode.
1086 // It access the boot device to initialize the file system context.
1087 /////////////////////////////////////////////////////////////////////////////////
1088
1089 // All cores enable IPI
1090 dev_pic_enable_ipi();
1091 hal_enable_irq( &status );
1092
1093 // all cores initialize the idle thread descriptor
1094 thread_idle_init( thread,
1095 THREAD_IDLE,
1096 &thread_idle_func,
1097 NULL,
1098 core_lid );
1099
1100 // all cores unblock idle thread, and register it in scheduler
1101 thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1102 core->scheduler.idle = thread;
1103
1104#if( DEBUG_KERNEL_INIT & 1 )
1105sched_display( core_lid );
1106#endif
1107
1108 // CPO in cluster 0 creates the VFS root
1109 if( (core_lid == 0) && (local_cxy == 0 ) )
1110 {
1111 vfs_root_inode_xp = XPTR_NULL;
1112
1113 // File System must be FATFS in this implementation,
1114 // but other File System can be introduced here
1115 if( CONFIG_VFS_ROOT_IS_FATFS )
1116 {
1117 // 1. allocate memory for FATFS context in cluster 0
1118 fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1119
1120 if( fatfs_ctx == NULL )
1121 {
1122 printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1123 __FUNCTION__ );
1124 hal_core_sleep();
1125 }
1126
1127 // 2. access boot device to initialize FATFS context
1128 fatfs_ctx_init( fatfs_ctx );
1129
1130 // 3. get various informations from FATFS context
1131 uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1132 uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1133 fatfs_ctx->sectors_per_cluster;
1134 uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1135
1136 // 4. initialize the FATFS entry in the vfs_context[] array
1137 vfs_ctx_init( FS_TYPE_FATFS, // fs type
1138 0, // attributes: unused
1139 total_clusters,
1140 cluster_size,
1141 vfs_root_inode_xp, // VFS root
1142 fatfs_ctx ); // extend
1143
1144 // 5. create VFS root inode in cluster 0
1145 error = vfs_inode_create( XPTR_NULL, // dentry_xp
1146 FS_TYPE_FATFS, // fs_type
1147 INODE_TYPE_DIR, // inode_type
1148 (void *)(intptr_t)root_dir_cluster, // extend
1149 0, // attr
1150 0, // rights
1151 0, // uid
1152 0, // gid
1153 &vfs_root_inode_xp ); // return
1154 if( error )
1155 {
1156 printk("\n[PANIC] in %s : cannot create VFS root inode in cluster 0\n",
1157 __FUNCTION__ );
1158 hal_core_sleep();
1159 }
1160
1161 // 6. update the FATFS entry in vfs_context[] array
1162 fs_context[FS_TYPE_FATFS].vfs_root_xp = vfs_root_inode_xp;
1163
1164 // 7. check FATFS initialization
1165 vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1166
1167 if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1168 {
1169 printk("\n[PANIC] in %s : illegal FATFS context in cluster 0\n",
1170 __FUNCTION__ );
1171 hal_core_sleep();
1172 }
1173
1174 }
1175 else
1176 {
1177 printk("\n[PANIC] in %s : unsupported VFS type in cluster 0\n",
1178 __FUNCTION__ );
1179 hal_core_sleep();
1180 }
1181
1182 // register VFS root inode in process_zero descriptor of cluster 0
1183 process_zero.vfs_root_xp = vfs_root_inode_xp;
1184 process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1185 }
1186
1187 /////////////////////////////////////////////////////////////////////////////////
1188 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1189 (info->x_size * info->y_size) );
1190 barrier_wait( &local_barrier , info->cores_nr );
1191 /////////////////////////////////////////////////////////////////////////////////
1192
1193#if DEBUG_KERNEL_INIT
1194if( (core_lid == 0) & (local_cxy == 0) )
1195printk("\n[DBG] %s : exit barrier 4 : VFS root initialized in cluster 0 / sr %x / cycle %d\n",
1196__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1197#endif
1198
1199 /////////////////////////////////////////////////////////////////////////////////
1200 // STEP 5 : Other CP0s allocate memory for the selected FS context,
1201 // and initialise both the local FS context and the local VFS context
1202 // from values stored in cluster 0.
1203 // They get the VFS root inode extended pointer from cluster 0.
1204 /////////////////////////////////////////////////////////////////////////////////
1205
1206 if( (core_lid == 0) && (local_cxy != 0) )
1207 {
1208 // File System must be FATFS in this implementation,
1209 // but other File System can be introduced here
1210 if( CONFIG_VFS_ROOT_IS_FATFS )
1211 {
1212 // 1. allocate memory for local FATFS context
1213 fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1214
1215 // check memory
1216 if( local_fatfs_ctx == NULL )
1217 {
1218 printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1219 __FUNCTION__ , local_cxy );
1220 hal_core_sleep();
1221 }
1222
1223 // 2. get local pointer on VFS context for FATFS
1224 vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1225
1226 // 3. get local pointer on FATFS context in cluster 0
1227 fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1228
1229 // 4. copy FATFS context from cluster 0 to local cluster
1230 hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1231 XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1232
1233 // 5. copy VFS context from cluster 0 to local cluster
1234 hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1235 XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1236
1237 // 6. update extend field in local copy of VFS context
1238 vfs_ctx->extend = local_fatfs_ctx;
1239
1240 if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1241 {
1242 printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1243 __FUNCTION__ , local_cxy );
1244 hal_core_sleep();
1245 }
1246 }
1247
1248 // get extended pointer on VFS root inode from cluster 0
1249 vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1250
1251 // update local process_zero descriptor
1252 process_zero.vfs_root_xp = vfs_root_inode_xp;
1253 process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1254 }
1255
1256 /////////////////////////////////////////////////////////////////////////////////
1257 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1258 (info->x_size * info->y_size) );
1259 barrier_wait( &local_barrier , info->cores_nr );
1260 /////////////////////////////////////////////////////////////////////////////////
1261
1262#if DEBUG_KERNEL_INIT
1263if( (core_lid == 0) & (local_cxy == 1) )
1264printk("\n[DBG] %s : exit barrier 5 : VFS root initialized in cluster 1 / sr %x / cycle %d\n",
1265__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1266#endif
1267
1268 /////////////////////////////////////////////////////////////////////////////////
1269 // STEP 6 : CP0 in cluster 0 makes the global DEVFS tree initialisation:
1270 // It initializes the DEVFS context, and creates the DEVFS
1271 // "dev" and "external" inodes in cluster 0.
1272 /////////////////////////////////////////////////////////////////////////////////
1273
1274 if( (core_lid == 0) && (local_cxy == 0) )
1275 {
1276 // 1. allocate memory for DEVFS context extension in cluster 0
1277 devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1278
1279 if( devfs_ctx == NULL )
1280 {
1281 printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1282 __FUNCTION__ , local_cxy );
1283 hal_core_sleep();
1284 }
1285
1286 // 2. initialize the DEVFS entry in the vfs_context[] array
1287 vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1288 0, // attributes: unused
1289 0, // total_clusters: unused
1290 0, // cluster_size: unused
1291 vfs_root_inode_xp, // VFS root
1292 devfs_ctx ); // extend
1293
1294 // 3. create "dev" and "external" inodes (directories)
1295 devfs_global_init( process_zero.vfs_root_xp,
1296 &devfs_dev_inode_xp,
1297 &devfs_external_inode_xp );
1298
1299 // 4. initializes DEVFS context extension
1300 devfs_ctx_init( devfs_ctx,
1301 devfs_dev_inode_xp,
1302 devfs_external_inode_xp );
1303 }
1304
1305 /////////////////////////////////////////////////////////////////////////////////
1306 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1307 (info->x_size * info->y_size) );
1308 barrier_wait( &local_barrier , info->cores_nr );
1309 /////////////////////////////////////////////////////////////////////////////////
1310
1311#if DEBUG_KERNEL_INIT
1312if( (core_lid == 0) & (local_cxy == 0) )
1313printk("\n[DBG] %s : exit barrier 6 : DEVFS root initialized in cluster 0 / sr %x / cycle %d\n",
1314__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1315#endif
1316
1317 /////////////////////////////////////////////////////////////////////////////////
1318 // STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1319 // Each CP0 get the "dev" and "external" extended pointers from
1320 // values stored in cluster 0.
1321 // Then each CP0 in cluster(i) creates the DEVFS "internal" directory,
1322 // and creates the pseudo-files for all chdevs in cluster (i).
1323 /////////////////////////////////////////////////////////////////////////////////
1324
1325 if( core_lid == 0 )
1326 {
1327 // get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1328 xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1329
1330 // get pointer on DEVFS context in cluster 0
1331 devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1332
1333 devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1334 devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1335
1336 // populate DEVFS in all clusters
1337 devfs_local_init( devfs_dev_inode_xp,
1338 devfs_external_inode_xp,
1339 &devfs_internal_inode_xp );
1340 }
1341
1342 /////////////////////////////////////////////////////////////////////////////////
1343 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1344 (info->x_size * info->y_size) );
1345 barrier_wait( &local_barrier , info->cores_nr );
1346 /////////////////////////////////////////////////////////////////////////////////
1347
1348#if DEBUG_KERNEL_INIT
1349if( (core_lid == 0) & (local_cxy == 0) )
1350printk("\n[DBG] %s : exit barrier 7 : DEV initialized in cluster 0 / sr %x / cycle %d\n",
1351__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1352#endif
1353
1354 /////////////////////////////////////////////////////////////////////////////////
1355 // STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1356 /////////////////////////////////////////////////////////////////////////////////
1357
1358 if( (core_lid == 0) && (local_cxy == 0) )
1359 {
1360
1361#if( DEBUG_KERNEL_INIT & 1 )
1362vfs_display( vfs_root_inode_xp );
1363#endif
1364
1365 process_init_create();
1366 }
1367
1368 /////////////////////////////////////////////////////////////////////////////////
1369 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1370 (info->x_size * info->y_size) );
1371 barrier_wait( &local_barrier , info->cores_nr );
1372 /////////////////////////////////////////////////////////////////////////////////
1373
1374#if DEBUG_KERNEL_INIT
1375if( (core_lid == 0) & (local_cxy == 0) )
1376printk("\n[DBG] %s : exit barrier 8 : process init created / sr %x / cycle %d\n",
1377__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1378#endif
1379
1380#if (DEBUG_KERNEL_INIT & 1)
1381if( (core_lid == 0) & (local_cxy == 0) )
1382sched_display( 0 );
1383#endif
1384
1385 /////////////////////////////////////////////////////////////////////////////////
1386 // STEP 9 : CP0 in cluster 0 print banner
1387 /////////////////////////////////////////////////////////////////////////////////
1388
1389 if( (core_lid == 0) && (local_cxy == 0) )
1390 {
1391 print_banner( (info->x_size * info->y_size) , info->cores_nr );
1392
1393#if( DEBUG_KERNEL_INIT & 1 )
1394printk("\n\n***** memory fooprint for main kernel objects\n\n"
1395 " - thread descriptor : %d bytes\n"
1396 " - process descriptor : %d bytes\n"
1397 " - cluster manager : %d bytes\n"
1398 " - chdev descriptor : %d bytes\n"
1399 " - core descriptor : %d bytes\n"
1400 " - scheduler : %d bytes\n"
1401 " - rpc fifo : %d bytes\n"
1402 " - page descriptor : %d bytes\n"
1403 " - mapper root : %d bytes\n"
1404 " - ppm manager : %d bytes\n"
1405 " - kcm manager : %d bytes\n"
1406 " - khm manager : %d bytes\n"
1407 " - vmm manager : %d bytes\n"
1408 " - gpt root : %d bytes\n"
1409 " - list item : %d bytes\n"
1410 " - xlist item : %d bytes\n"
1411 " - busylock : %d bytes\n"
1412 " - remote busylock : %d bytes\n"
1413 " - queuelock : %d bytes\n"
1414 " - remote queuelock : %d bytes\n"
1415 " - rwlock : %d bytes\n"
1416 " - remote rwlock : %d bytes\n",
1417 sizeof( thread_t ),
1418 sizeof( process_t ),
1419 sizeof( cluster_t ),
1420 sizeof( chdev_t ),
1421 sizeof( core_t ),
1422 sizeof( scheduler_t ),
1423 sizeof( remote_fifo_t ),
1424 sizeof( page_t ),
1425 sizeof( mapper_t ),
1426 sizeof( ppm_t ),
1427 sizeof( kcm_t ),
1428 sizeof( khm_t ),
1429 sizeof( vmm_t ),
1430 sizeof( gpt_t ),
1431 sizeof( list_entry_t ),
1432 sizeof( xlist_entry_t ),
1433 sizeof( busylock_t ),
1434 sizeof( remote_busylock_t ),
1435 sizeof( queuelock_t ),
1436 sizeof( remote_queuelock_t ),
1437 sizeof( rwlock_t ),
1438 sizeof( remote_rwlock_t ));
1439#endif
1440
1441 }
1442
1443 // each core activates its private TICK IRQ
1444 dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1445
1446#if DEBUG_KERNEL_INIT
1447printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1448__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1449#endif
1450
1451 // each core jump to thread_idle_func
1452 thread_idle_func();
1453}
1454
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