source: trunk/kernel/kern/kernel_init.c@ 635

Last change on this file since 635 was 635, checked in by alain, 7 years ago

This version is a major evolution: The physical memory allocators,
defined in the kmem.c, ppm.c, and kcm.c files have been modified
to support remote accesses. The RPCs that were previously user
to allocate physical memory in a remote cluster have been removed.
This has been done to cure a dead-lock in case of concurrent page-faults.

This version 2.2 has been tested on a (4 clusters / 2 cores per cluster)
TSAR architecture, for both the "sort" and the "fft" applications.
File size: 62.4 KB
Line 
1/*
2 * kernel_init.c - kernel parallel initialization
3 *
4 * Authors : Mohamed Lamine Karaoui (2015)
5 * Alain Greiner (2016,2017,2018,2019)
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 a set of 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 core[0] 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// This array is used for debug, and describes the kernel locks usage,
128// It must be kept consistent with the defines in kernel_config.h file.
129__attribute__((section(".kdata")))
130char * lock_type_str[] =
131{
132 "unused_0", // 0
133
134 "CLUSTER_KCM", // 1
135 "SCHED_STATE", // 2
136 "VMM_STACK", // 3
137 "VMM_MMAP", // 4
138 "VFS_CTX", // 5
139 "KCM_STATE", // 6
140 "KHM_STATE", // 7
141 "HTAB_STATE", // 8
142
143 "PPM_FREE", // 9
144 "THREAD_JOIN", // 10
145 "XHTAB_STATE", // 11
146 "CHDEV_QUEUE", // 12
147 "CHDEV_TXT0", // 13
148 "CHDEV_TXTLIST", // 14
149 "PAGE_STATE", // 15
150 "MUTEX_STATE", // 16
151 "CONDVAR_STATE", // 17
152 "SEM_STATE", // 18
153 "PROCESS_CWD", // 19
154 "BARRIER_STATE", // 20
155
156 "CLUSTER_PREFTBL", // 21
157
158 "PPM_DIRTY", // 22
159 "CLUSTER_LOCALS", // 23
160 "CLUSTER_COPIES", // 24
161 "PROCESS_CHILDREN", // 25
162 "PROCESS_USERSYNC", // 26
163 "PROCESS_FDARRAY", // 27
164 "PROCESS_DIR", // 28
165 "unused_29", // 29
166
167 "PROCESS_THTBL", // 30
168
169 "MAPPER_STATE", // 31
170 "VFS_SIZE", // 32
171 "VFS_FILE", // 33
172 "VMM_VSL", // 34
173 "VFS_MAIN", // 35
174 "FATFS_FAT", // 36
175};
176
177// debug variables to analyse the sys_read() and sys_write() syscalls timing
178
179#if DEBUG_SYS_READ
180uint32_t enter_sys_read;
181uint32_t exit_sys_read;
182
183uint32_t enter_devfs_read;
184uint32_t exit_devfs_read;
185
186uint32_t enter_txt_read;
187uint32_t exit_txt_read;
188
189uint32_t enter_chdev_cmd_read;
190uint32_t exit_chdev_cmd_read;
191
192uint32_t enter_chdev_server_read;
193uint32_t exit_chdev_server_read;
194
195uint32_t enter_tty_cmd_read;
196uint32_t exit_tty_cmd_read;
197
198uint32_t enter_tty_isr_read;
199uint32_t exit_tty_isr_read;
200#endif
201
202// these debug variables are used to analyse the sys_write() syscall timing
203
204#if DEBUG_SYS_WRITE
205uint32_t enter_sys_write;
206uint32_t exit_sys_write;
207
208uint32_t enter_devfs_write;
209uint32_t exit_devfs_write;
210
211uint32_t enter_txt_write;
212uint32_t exit_txt_write;
213
214uint32_t enter_chdev_cmd_write;
215uint32_t exit_chdev_cmd_write;
216
217uint32_t enter_chdev_server_write;
218uint32_t exit_chdev_server_write;
219
220uint32_t enter_tty_cmd_write;
221uint32_t exit_tty_cmd_write;
222
223uint32_t enter_tty_isr_write;
224uint32_t exit_tty_isr_write;
225#endif
226
227// intrumentation variables : cumulated costs per syscall type in cluster
228
229#if CONFIG_INSTRUMENTATION_SYSCALLS
230__attribute__((section(".kdata")))
231uint32_t syscalls_cumul_cost[SYSCALLS_NR];
232
233__attribute__((section(".kdata")))
234uint32_t syscalls_occurences[SYSCALLS_NR];
235#endif
236
237///////////////////////////////////////////////////////////////////////////////////////////
238// This function displays the ALMOS_MKH banner.
239///////////////////////////////////////////////////////////////////////////////////////////
240static void print_banner( uint32_t nclusters , uint32_t ncores )
241{
242 printk("\n"
243 " _ __ __ _____ ______ __ __ _ __ _ _ \n"
244 " /\\ | | | \\ / | / ___ \\ / _____| | \\ / | | | / / | | | | \n"
245 " / \\ | | | \\/ | | / \\ | | / | \\/ | | |/ / | | | | \n"
246 " / /\\ \\ | | | |\\ /| | | | | | | |_____ ___ | |\\ /| | | / | |___| | \n"
247 " / /__\\ \\ | | | | \\/ | | | | | | \\_____ \\ |___| | | \\/ | | | \\ | ___ | \n"
248 " / ______ \\ | | | | | | | | | | | | | | | | | |\\ \\ | | | | \n"
249 " / / \\ \\ | |____ | | | | | \\___/ | _____/ | | | | | | | \\ \\ | | | | \n"
250 " /_/ \\_\\ |______| |_| |_| \\_____/ |______/ |_| |_| |_| \\_\\ |_| |_| \n"
251 "\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
252 "\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
253 CONFIG_VERSION , nclusters , ncores );
254}
255
256
257///////////////////////////////////////////////////////////////////////////////////////////
258// This function initializes the TXT_TX[0] and TXT_RX[0] chdev descriptors, implementing
259// the "kernel terminal", shared by all kernel instances for debug messages.
260// These chdev are implemented as global variables (replicated in all clusters),
261// because this terminal is used before the kmem allocator initialisation, but only
262// the chdevs in cluster 0 are registered in the "chdev_dir" directory.
263// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
264// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
265// Note: The TXT_RX[0] chdev is created, but is not used by ALMOS-MKH (september 2018).
266///////////////////////////////////////////////////////////////////////////////////////////
267// @ info : pointer on the local boot-info structure.
268///////////////////////////////////////////////////////////////////////////////////////////
269static void __attribute__ ((noinline)) txt0_device_init( boot_info_t * info )
270{
271 boot_device_t * dev_tbl; // pointer on array of devices in boot_info
272 uint32_t dev_nr; // actual number of devices in this cluster
273 xptr_t base; // remote pointer on segment base
274 uint32_t func; // device functional index
275 uint32_t impl; // device implementation index
276 uint32_t i; // device index in dev_tbl
277 uint32_t x; // X cluster coordinate
278 uint32_t y; // Y cluster coordinate
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
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[%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[%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 core[0] core, that computes a global index
468// for all external chdevs. Each core[0] 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 = NULL;
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 ) && ( entry != NULL ) )
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[%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 core[0] 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_time_stamp() > DEBUG_KERNEL_INIT )
782{
783 printk("\n[%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 core[0]s 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
900
901
902/////////////////////////////////
903// kleenex debug function
904/////////////////////////////////
905void display_fat( uint32_t step )
906{
907 fatfs_ctx_t * fatfs_ctx = fs_context[FS_TYPE_FATFS].extend;
908 if( fatfs_ctx != NULL )
909 {
910 printk("\n[%s] step %d at cycle %d\n", __FUNCTION__, step, (uint32_t)hal_get_cycles() );
911 xptr_t mapper_xp = fatfs_ctx->fat_mapper_xp;
912 mapper_display_page( mapper_xp , 0 , 128 );
913 }
914 else
915 {
916 printk("\n[%s] step %d : fatfs context not initialized\n", __FUNCTION__, step );
917 }
918}
919
920
921
922
923
924///////////////////////////////////////////////////////////////////////////////////////////
925// This function is the entry point for the kernel initialisation.
926// It is executed by all cores in all clusters, but only core[0] initializes
927// the shared resources such as the cluster manager, or the local peripherals.
928// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
929// only information contained in the local boot_info_t structure, set by the bootloader.
930// Only core[0] in cluster 0 print the log messages.
931///////////////////////////////////////////////////////////////////////////////////////////
932// @ info : pointer on the local boot-info structure.
933///////////////////////////////////////////////////////////////////////////////////////////
934void kernel_init( boot_info_t * info )
935{
936 lid_t core_lid = -1; // running core local index
937 cxy_t core_cxy = -1; // running core cluster identifier
938 gid_t core_gid; // running core hardware identifier
939 cluster_t * cluster; // pointer on local cluster manager
940 core_t * core; // pointer on running core descriptor
941 thread_t * thread; // pointer on idle thread descriptor
942
943 xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
944 xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
945 xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
946 xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
947
948 error_t error;
949 reg_t status; // running core status register
950
951 /////////////////////////////////////////////////////////////////////////////////
952 // STEP 1 : Each core get its core identifier from boot_info, and makes
953 // a partial initialisation of its private idle thread descriptor.
954 // core[0] initializes the "local_cxy" global variable.
955 // core[0] in cluster[0] initializes the TXT0 chdev for log messages.
956 /////////////////////////////////////////////////////////////////////////////////
957
958 error = get_core_identifiers( info,
959 &core_lid,
960 &core_cxy,
961 &core_gid );
962
963 // core[0] initialize cluster identifier
964 if( core_lid == 0 ) local_cxy = info->cxy;
965
966 // each core gets a pointer on its private idle thread descriptor
967 thread = (thread_t *)( idle_threads + (core_lid * CONFIG_THREAD_DESC_SIZE) );
968
969 // each core registers this thread pointer in hardware register
970 hal_set_current_thread( thread );
971
972 // each core register core descriptor pointer in idle thread descriptor
973 thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
974
975 // each core initializes the idle thread locks counters
976 thread->busylocks = 0;
977
978#if DEBUG_BUSYLOCK
979 // each core initialise the idle thread list of busylocks
980 xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
981#endif
982
983 // core[0] initializes cluster info
984 if( core_lid == 0 ) cluster_info_init( info );
985
986 // core[0] in cluster[0] initialises TXT0 chdev descriptor
987 if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
988
989 // all cores check identifiers
990 if( error )
991 {
992 printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
993 __FUNCTION__, core_lid, core_cxy, core_lid );
994 hal_core_sleep();
995 }
996
997 /////////////////////////////////////////////////////////////////////////////////
998 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
999 (info->x_size * info->y_size) );
1000 barrier_wait( &local_barrier , info->cores_nr );
1001 /////////////////////////////////////////////////////////////////////////////////
1002
1003#if DEBUG_KERNEL_INIT
1004if( (core_lid == 0) & (local_cxy == 0) )
1005printk("\n[%s] exit barrier 1 : TXT0 initialized / cycle %d\n",
1006__FUNCTION__, (uint32_t)hal_get_cycles() );
1007#endif
1008
1009 /////////////////////////////////////////////////////////////////////////////////
1010 // STEP 2 : core[0] initializes the cluter manager,
1011 // including the physical memory allocator.
1012 /////////////////////////////////////////////////////////////////////////////////
1013
1014 // core[0] initialises DQDT (only core[0] in cluster 0 build the quad-tree)
1015 if( core_lid == 0 ) dqdt_init();
1016
1017 // core[0] initialize other cluster manager complex structures
1018 if( core_lid == 0 )
1019 {
1020 error = cluster_manager_init( info );
1021
1022 if( error )
1023 {
1024 printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
1025 __FUNCTION__, local_cxy );
1026 hal_core_sleep();
1027 }
1028 }
1029
1030 /////////////////////////////////////////////////////////////////////////////////
1031 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1032 (info->x_size * info->y_size) );
1033 barrier_wait( &local_barrier , info->cores_nr );
1034 /////////////////////////////////////////////////////////////////////////////////
1035
1036#if DEBUG_KERNEL_INIT
1037if( (core_lid == 0) & (local_cxy == 0) )
1038printk("\n[%s] exit barrier 2 : cluster manager initialized / cycle %d\n",
1039__FUNCTION__, (uint32_t)hal_get_cycles() );
1040#endif
1041
1042 /////////////////////////////////////////////////////////////////////////////////
1043 // STEP 3 : all cores initialize the idle thread descriptor.
1044 // core[0] initializes the process_zero descriptor,
1045 // including the kernel VMM (both GPT and VSL)
1046 /////////////////////////////////////////////////////////////////////////////////
1047
1048 // all cores get pointer on local cluster manager & core descriptor
1049 cluster = &cluster_manager;
1050 core = &cluster->core_tbl[core_lid];
1051
1052 // all cores update the register(s) defining the kernel
1053 // entry points for interrupts, exceptions and syscalls,
1054 // this must be done before VFS initialisation, because
1055 // kernel_init() uses RPCs requiring IPIs...
1056 hal_set_kentry();
1057
1058 // all cores initialize the idle thread descriptor
1059 thread_idle_init( thread,
1060 THREAD_IDLE,
1061 &thread_idle_func,
1062 NULL,
1063 core_lid );
1064
1065 // core[0] initializes the process_zero descriptor,
1066 if( core_lid == 0 ) process_zero_create( &process_zero , info );
1067
1068 /////////////////////////////////////////////////////////////////////////////////
1069 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1070 (info->x_size * info->y_size) );
1071 barrier_wait( &local_barrier , info->cores_nr );
1072 /////////////////////////////////////////////////////////////////////////////////
1073
1074#if DEBUG_KERNEL_INIT
1075if( (core_lid == 0) & (local_cxy == 0) )
1076printk("\n[%s] exit barrier 3 : kernel processs initialized / cycle %d\n",
1077__FUNCTION__, (uint32_t)hal_get_cycles() );
1078#endif
1079
1080 /////////////////////////////////////////////////////////////////////////////////
1081 // STEP 4 : all cores initialize their private MMU
1082 // core[0] in cluster 0 initializes the IOPIC device.
1083 /////////////////////////////////////////////////////////////////////////////////
1084
1085 // all cores initialise their MMU
1086 hal_mmu_init( &process_zero.vmm.gpt );
1087
1088 // core[0] in cluster[0] initializes the PIC chdev,
1089 if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
1090
1091 ////////////////////////////////////////////////////////////////////////////////
1092 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1093 (info->x_size * info->y_size) );
1094 barrier_wait( &local_barrier , info->cores_nr );
1095 ////////////////////////////////////////////////////////////////////////////////
1096
1097#if DEBUG_KERNEL_INIT
1098if( (core_lid == 0) & (local_cxy == 0) )
1099printk("\n[%s] exit barrier 4 : MMU and IOPIC initialized / cycle %d\n",
1100__FUNCTION__, (uint32_t)hal_get_cycles() );
1101#endif
1102
1103 ////////////////////////////////////////////////////////////////////////////////
1104 // STEP 5 : core[0] initializes the distibuted LAPIC descriptor.
1105 // core[0] initializes the internal chdev descriptors
1106 // core[0] initialize the local external chdev descriptors
1107 ////////////////////////////////////////////////////////////////////////////////
1108
1109 // all core[0]s initialize their local LAPIC extension,
1110 if( core_lid == 0 ) lapic_init( info );
1111
1112 // core[0] scan the internal (private) peripherals,
1113 // and allocates memory for the corresponding chdev descriptors.
1114 if( core_lid == 0 ) internal_devices_init( info );
1115
1116
1117 // All core[0]s contribute to initialise external peripheral chdev descriptors.
1118 // Each core[0][cxy] scan the set of external (shared) peripherals (but the TXT0),
1119 // and allocates memory for the chdev descriptors that must be placed
1120 // on the (cxy) cluster according to the global index value.
1121
1122 if( core_lid == 0 ) external_devices_init( info );
1123
1124 /////////////////////////////////////////////////////////////////////////////////
1125 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1126 (info->x_size * info->y_size) );
1127 barrier_wait( &local_barrier , info->cores_nr );
1128 /////////////////////////////////////////////////////////////////////////////////
1129
1130#if DEBUG_KERNEL_INIT
1131if( (core_lid == 0) & (local_cxy == 0) )
1132printk("\n[%s] exit barrier 5 : chdevs initialised / cycle %d\n",
1133__FUNCTION__, (uint32_t)hal_get_cycles() );
1134#endif
1135
1136#if( DEBUG_KERNEL_INIT & 1 )
1137if( (core_lid == 0) & (local_cxy == 0) )
1138chdev_dir_display();
1139#endif
1140
1141 /////////////////////////////////////////////////////////////////////////////////
1142 // STEP 6 : all cores enable IPI (Inter Procesor Interrupt),
1143 // all cores unblock the idle thread, and register it in scheduler.
1144 // core[0] in cluster[0] creates the VFS root inode.
1145 // It access the boot device to initialize the file system context.
1146 /////////////////////////////////////////////////////////////////////////////////
1147
1148 // All cores enable IPI
1149 dev_pic_enable_ipi();
1150 hal_enable_irq( &status );
1151
1152 // all cores unblock the idle thread, and register it in scheduler
1153 thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1154 core->scheduler.idle = thread;
1155
1156 // core[O] in cluster[0] creates the VFS root
1157 if( (core_lid == 0) && (local_cxy == 0 ) )
1158 {
1159 vfs_root_inode_xp = XPTR_NULL;
1160
1161 // Only FATFS is supported yet,
1162 // other File System can be introduced here
1163 if( CONFIG_VFS_ROOT_IS_FATFS )
1164 {
1165 // 1. allocate memory for FATFS context in cluster 0
1166 fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1167
1168 if( fatfs_ctx == NULL )
1169 {
1170 printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1171 __FUNCTION__ );
1172 hal_core_sleep();
1173 }
1174
1175 // 2. access boot device to initialize FATFS context
1176 fatfs_ctx_init( fatfs_ctx );
1177
1178 // 3. get various informations from FATFS context
1179 uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1180 uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1181 fatfs_ctx->sectors_per_cluster;
1182 uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1183
1184 // 4. create VFS root inode in cluster 0
1185 error = vfs_inode_create( FS_TYPE_FATFS, // fs_type
1186 0, // attr
1187 0, // rights
1188 0, // uid
1189 0, // gid
1190 &vfs_root_inode_xp ); // return
1191 if( error )
1192 {
1193 printk("\n[PANIC] in %s : cannot create VFS root inode in cluster 0\n",
1194 __FUNCTION__ );
1195 hal_core_sleep();
1196 }
1197
1198 // 5. update FATFS root inode "type" and "extend" fields
1199 cxy_t vfs_root_cxy = GET_CXY( vfs_root_inode_xp );
1200 vfs_inode_t * vfs_root_ptr = GET_PTR( vfs_root_inode_xp );
1201 hal_remote_s32( XPTR( vfs_root_cxy , &vfs_root_ptr->type ), INODE_TYPE_DIR );
1202 hal_remote_spt( XPTR( vfs_root_cxy , &vfs_root_ptr->extend ),
1203 (void*)(intptr_t)root_dir_cluster );
1204
1205 // 6. initialize the generic VFS context for FATFS
1206 vfs_ctx_init( FS_TYPE_FATFS, // fs type
1207 0, // attributes: unused
1208 total_clusters, // number of clusters
1209 cluster_size, // bytes
1210 vfs_root_inode_xp, // VFS root
1211 fatfs_ctx ); // extend
1212 }
1213 else
1214 {
1215 printk("\n[PANIC] in %s : unsupported VFS type in cluster 0\n",
1216 __FUNCTION__ );
1217 hal_core_sleep();
1218 }
1219
1220 // create the <.> and <..> dentries in VFS root directory
1221 // the VFS root parent inode is the VFS root inode itself
1222 vfs_add_special_dentries( vfs_root_inode_xp,
1223 vfs_root_inode_xp );
1224
1225 // register VFS root inode in process_zero descriptor of cluster 0
1226 process_zero.vfs_root_xp = vfs_root_inode_xp;
1227 process_zero.cwd_xp = vfs_root_inode_xp;
1228 }
1229
1230 /////////////////////////////////////////////////////////////////////////////////
1231 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1232 (info->x_size * info->y_size) );
1233 barrier_wait( &local_barrier , info->cores_nr );
1234 /////////////////////////////////////////////////////////////////////////////////
1235
1236#if DEBUG_KERNEL_INIT
1237if( (core_lid == 0) & (local_cxy == 0) )
1238printk("\n[%s] exit barrier 6 : VFS root (%x,%x) in cluster 0 / cycle %d\n",
1239__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1240GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1241#endif
1242
1243 /////////////////////////////////////////////////////////////////////////////////
1244 // STEP 7 : In all other clusters than cluster[0], the core[0] allocates memory
1245 // for the selected FS context, and initialise the local FS context and
1246 // the local VFS context from values stored in cluster 0.
1247 // They get the VFS root inode extended pointer from cluster 0.
1248 /////////////////////////////////////////////////////////////////////////////////
1249
1250 if( (core_lid == 0) && (local_cxy != 0) )
1251 {
1252 // File System must be FATFS in this implementation,
1253 // but other File System can be introduced here
1254 if( CONFIG_VFS_ROOT_IS_FATFS )
1255 {
1256 // 1. allocate memory for local FATFS context
1257 fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1258
1259 // check memory
1260 if( local_fatfs_ctx == NULL )
1261 {
1262 printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1263 __FUNCTION__ , local_cxy );
1264 hal_core_sleep();
1265 }
1266
1267 // 2. get local pointer on VFS context for FATFS
1268 vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1269
1270 // 3. get local pointer on FATFS context in cluster 0
1271 fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1272
1273 // 4. copy FATFS context from cluster 0 to local cluster
1274 hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1275 XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1276
1277 // 5. copy VFS context from cluster 0 to local cluster
1278 hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1279 XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1280
1281 // 6. update extend field in local copy of VFS context
1282 vfs_ctx->extend = local_fatfs_ctx;
1283
1284 if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1285 {
1286 printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1287 __FUNCTION__ , local_cxy );
1288 hal_core_sleep();
1289 }
1290 }
1291
1292 // get extended pointer on VFS root inode from cluster 0
1293 vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1294
1295 // update local process_zero descriptor
1296 process_zero.vfs_root_xp = vfs_root_inode_xp;
1297 process_zero.cwd_xp = vfs_root_inode_xp;
1298 }
1299
1300 /////////////////////////////////////////////////////////////////////////////////
1301 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1302 (info->x_size * info->y_size) );
1303 barrier_wait( &local_barrier , info->cores_nr );
1304 /////////////////////////////////////////////////////////////////////////////////
1305
1306#if DEBUG_KERNEL_INIT
1307if( (core_lid == 0) & (local_cxy == 1) )
1308printk("\n[%s] exit barrier 7 : VFS root (%x,%x) in cluster 1 / cycle %d\n",
1309__FUNCTION__, GET_CXY(process_zero.vfs_root_xp),
1310GET_PTR(process_zero.vfs_root_xp), (uint32_t)hal_get_cycles() );
1311#endif
1312
1313 /////////////////////////////////////////////////////////////////////////////////
1314 // STEP 8 : core[0] in cluster 0 makes the global DEVFS initialisation:
1315 // It initializes the DEVFS context, and creates the DEVFS
1316 // "dev" and "external" inodes in cluster 0.
1317 /////////////////////////////////////////////////////////////////////////////////
1318
1319 if( (core_lid == 0) && (local_cxy == 0) )
1320 {
1321 // 1. allocate memory for DEVFS context extension in cluster 0
1322 devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1323
1324 if( devfs_ctx == NULL )
1325 {
1326 printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1327 __FUNCTION__ , local_cxy );
1328 hal_core_sleep();
1329 }
1330
1331 // 2. initialize the DEVFS entry in the vfs_context[] array
1332 vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1333 0, // attributes: unused
1334 0, // total_clusters: unused
1335 0, // cluster_size: unused
1336 vfs_root_inode_xp, // VFS root
1337 devfs_ctx ); // extend
1338
1339 // 3. create "dev" and "external" inodes (directories)
1340 devfs_global_init( process_zero.vfs_root_xp,
1341 &devfs_dev_inode_xp,
1342 &devfs_external_inode_xp );
1343
1344 // 4. initializes DEVFS context extension
1345 devfs_ctx_init( devfs_ctx,
1346 devfs_dev_inode_xp,
1347 devfs_external_inode_xp );
1348 }
1349
1350 /////////////////////////////////////////////////////////////////////////////////
1351 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1352 (info->x_size * info->y_size) );
1353 barrier_wait( &local_barrier , info->cores_nr );
1354 /////////////////////////////////////////////////////////////////////////////////
1355
1356#if DEBUG_KERNEL_INIT
1357if( (core_lid == 0) & (local_cxy == 0) )
1358printk("\n[%s] exit barrier 8 : DEVFS root initialized in cluster 0 / cycle %d\n",
1359__FUNCTION__, (uint32_t)hal_get_cycles() );
1360#endif
1361
1362 /////////////////////////////////////////////////////////////////////////////////
1363 // STEP 9 : In all clusters in parallel, core[0] completes DEVFS initialization.
1364 // Each core[0] get the "dev" and "external" extended pointers from
1365 // values stored in cluster(0), creates the DEVFS "internal" directory,
1366 // and creates the pseudo-files for all chdevs in local cluster.
1367 /////////////////////////////////////////////////////////////////////////////////
1368
1369 if( core_lid == 0 )
1370 {
1371 // get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1372 xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1373
1374 // get pointer on DEVFS context in cluster 0
1375 devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1376
1377 devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1378 devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1379
1380 // populate DEVFS in all clusters
1381 devfs_local_init( devfs_dev_inode_xp,
1382 devfs_external_inode_xp,
1383 &devfs_internal_inode_xp );
1384 }
1385
1386 /////////////////////////////////////////////////////////////////////////////////
1387 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1388 (info->x_size * info->y_size) );
1389 barrier_wait( &local_barrier , info->cores_nr );
1390 /////////////////////////////////////////////////////////////////////////////////
1391
1392#if DEBUG_KERNEL_INIT
1393if( (core_lid == 0) & (local_cxy == 0) )
1394printk("\n[%s] exit barrier 9 : DEVFS initialized in cluster 0 / cycle %d\n",
1395__FUNCTION__, (uint32_t)hal_get_cycles() );
1396#endif
1397
1398#if( DEBUG_KERNEL_INIT & 1 )
1399if( (core_lid == 0) & (local_cxy == 0) )
1400vfs_display( vfs_root_inode_xp );
1401#endif
1402
1403 /////////////////////////////////////////////////////////////////////////////////
1404 // STEP 10 : core[0] in cluster 0 creates the first user process (process_init).
1405 // This include the first user process VMM (GPT and VSL) creation.
1406 // Finally, it prints the ALMOS-MKH banner.
1407 /////////////////////////////////////////////////////////////////////////////////
1408
1409 if( (core_lid == 0) && (local_cxy == 0) )
1410 {
1411 process_init_create();
1412 }
1413
1414#if DEBUG_KERNEL_INIT
1415if( (core_lid == 0) & (local_cxy == 0) )
1416printk("\n[%s] exit barrier 10 : process_init created in cluster 0 / cycle %d\n",
1417__FUNCTION__, (uint32_t)hal_get_cycles() );
1418#endif
1419
1420#if (DEBUG_KERNEL_INIT & 1)
1421if( (core_lid == 0) & (local_cxy == 0) )
1422sched_display( 0 );
1423#endif
1424
1425 if( (core_lid == 0) && (local_cxy == 0) )
1426 {
1427 print_banner( (info->x_size * info->y_size) , info->cores_nr );
1428 }
1429
1430#if CONFIG_INSTRUMENTATION_FOOTPRINT
1431if( (core_lid == 0) & (local_cxy == 0) )
1432printk("\n\n***** memory fooprint for main kernel objects\n\n"
1433 " - thread descriptor : %d bytes\n"
1434 " - process descriptor : %d bytes\n"
1435 " - cluster manager : %d bytes\n"
1436 " - chdev descriptor : %d bytes\n"
1437 " - core descriptor : %d bytes\n"
1438 " - scheduler : %d bytes\n"
1439 " - rpc fifo : %d bytes\n"
1440 " - page descriptor : %d bytes\n"
1441 " - mapper descriptor : %d bytes\n"
1442 " - vseg descriptor : %d bytes\n"
1443 " - ppm manager : %d bytes\n"
1444 " - kcm manager : %d bytes\n"
1445 " - khm manager : %d bytes\n"
1446 " - vmm manager : %d bytes\n"
1447 " - gpt root : %d bytes\n"
1448 " - vfs inode : %d bytes\n"
1449 " - vfs dentry : %d bytes\n"
1450 " - vfs file : %d bytes\n"
1451 " - vfs context : %d bytes\n"
1452 " - xhtab root : %d bytes\n"
1453 " - list item : %d bytes\n"
1454 " - xlist item : %d bytes\n"
1455 " - busylock : %d bytes\n"
1456 " - remote busylock : %d bytes\n"
1457 " - queuelock : %d bytes\n"
1458 " - remote queuelock : %d bytes\n"
1459 " - rwlock : %d bytes\n"
1460 " - remote rwlock : %d bytes\n",
1461 sizeof( thread_t ),
1462 sizeof( process_t ),
1463 sizeof( cluster_t ),
1464 sizeof( chdev_t ),
1465 sizeof( core_t ),
1466 sizeof( scheduler_t ),
1467 sizeof( remote_fifo_t ),
1468 sizeof( page_t ),
1469 sizeof( mapper_t ),
1470 sizeof( vseg_t ),
1471 sizeof( ppm_t ),
1472 sizeof( kcm_t ),
1473 sizeof( khm_t ),
1474 sizeof( vmm_t ),
1475 sizeof( gpt_t ),
1476 sizeof( vfs_inode_t ),
1477 sizeof( vfs_dentry_t ),
1478 sizeof( vfs_file_t ),
1479 sizeof( vfs_ctx_t ),
1480 sizeof( xhtab_t ),
1481 sizeof( list_entry_t ),
1482 sizeof( xlist_entry_t ),
1483 sizeof( busylock_t ),
1484 sizeof( remote_busylock_t ),
1485 sizeof( queuelock_t ),
1486 sizeof( remote_queuelock_t ),
1487 sizeof( rwlock_t ),
1488 sizeof( remote_rwlock_t ));
1489#endif
1490
1491 // each core activates its private TICK IRQ
1492 dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1493
1494 /////////////////////////////////////////////////////////////////////////////////
1495 if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1496 (info->x_size * info->y_size) );
1497 barrier_wait( &local_barrier , info->cores_nr );
1498 /////////////////////////////////////////////////////////////////////////////////
1499
1500#if DEBUG_KERNEL_INIT
1501thread_t * this = CURRENT_THREAD;
1502printk("\n[%s] : thread[%x,%x] on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1503__FUNCTION__ , this->process->pid, this->trdid,
1504local_cxy, core_lid, (uint32_t)hal_get_cycles() );
1505#endif
1506
1507 // each core jump to thread_idle_func
1508 thread_idle_func();
1509
1510} // end kernel_init()
1511
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