source: trunk/kernel/kern/kernel_init.c@ 601

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