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source: trunk/boot/tsar_mips32/boot.c @ 641

Last change on this file since 641 was 637, checked in by alain, 5 years ago
Introduce the non-standard pthread_parallel_create() system call and re-write the <fft> and <sort> applications to improve the intrinsic paralelism in applications.
File size: 38.5 KB

Line
1	/*
2	* boot.c - TSAR bootloader implementation.
3	*
4	* Authors : Vu Son (2016)
5	* Alain Greiner (2016,2017,2018,2019)
6	*
7	* Copyright (c) UPMC 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	/****************************************************************************
26	* This file contains the ALMOS-MKH. boot-loader for the TSAR architecture. *
27	* that is a clusterised, shared memory, multi-processor architecture, *
28	* where each processor core is identified by a composite index [cxy,lid] *
29	* with one physical memory bank per cluster. *
30	* *
31	* The 'boot.elf' file (containing the boot-loader binary code) is stored *
32	* on disk (not in the FAT file system), and must be loaded into memory by *
33	* the preloader running on the core[0][0] (cxy = 0 / lid = 0). *
34	* *
35	* The main task of the boot-loader is to load in the first physical page *
36	* of each cluster a copy of the kernel code (segments "kcode" and "kdata") *
37	* and to build - in each cluster - a cluster specific description of the *
38	* hardware archtecture, stored in the "kdata" segment as the boot_info_t *
39	* structure. The "kernel.elf" and "arch_info.bin" files are supposed to be *
40	* stored on disk in a FAT32 file system. *
41	* *
42	* All cores contribute to the boot procedure, but all cores are not *
43	* simultaneously active: *
44	* - in a first phase, only core[0][0] is running (core 0 in cluster 0). *
45	* - in a second phase, only core[cxy][0] is running in each cluster. *
46	* - in last phase, all core[cxy][lid] are running. *
47	* *
48	* Finally, all cores jump to the kernel_init() function that makes the *
49	* actual kernel initialisation. *
50	* *
51	* Implementation note: * * *
52	* To allows each core to use the local copy of both the boot code and the *
53	* kernel code, the boot-loader builds a minimal and temporary BPT (Boot *
54	* Page Table) containing only two big pages: page[0] maps the kernel code, *
55	* and page 1 maps the boot code. *
56	****************************************************************************/
57
58	#include <elf-types.h>
59	#include <hal_kernel_types.h>
60
61	#include <kernel_config.h>
62	#include <boot_config.h>
63
64	#include <arch_info.h>
65	#include <boot_info.h>
66
67	#include <boot_utils.h>
68	#include <boot_fat32.h>
69	#include <boot_bdv_driver.h>
70	#include <boot_hba_driver.h>
71	#include <boot_tty_driver.h>
72
73	/*****************************************************************************
74	* Macros.
75	****************************************************************************/
76
77	#define PAGE_ROUND_DOWN(x) ((x) & (~PPM_PAGE_SIZE -1))
78	#define PAGE_ROUND_UP(x) (((x) + PPM_PAGE_SIZE-1) & \
79	(~(PPM_PAGE_SIZE-1)))
80
81	/*****************************************************************************
82	* Global variables.
83	****************************************************************************/
84
85	// the Boot Page Table contains two PTE1, and should be aligned on 8 Kbytes
86
87	uint32_t boot_pt[2] __attribute__((aligned(0x2000)));
88
89	// synchronization variables.
90
91	volatile boot_remote_spinlock_t tty0_lock; // protect TTY0 access
92	volatile boot_remote_barrier_t global_barrier; // synchronize CP0 cores
93	volatile boot_remote_barrier_t local_barrier; // synchronize cores in one cluster
94	uint32_t active_cores_nr; // number of expected CP0s
95
96	// kernel segments layout variables
97
98	uint32_t seg_kcode_base; // kcode segment base address
99	uint32_t seg_kcode_size; // kcode segment size (bytes)
100	uint32_t seg_kdata_base; // kdata segment base address
101	uint32_t seg_kdata_size; // kdata segment size (bytes)
102
103	uint32_t kernel_entry; // kernel_init() function
104
105	// Functions
106
107	extern void boot_entry( void ); // boot_loader entry point
108	extern void boot_loader( lid_t lid, cxy_t cxy );
109
110
111	#if DEBUG_BOOT_INFO
112	/*********************************************************************************
113	* This debug function returns the printable string for each device type.
114	********************************************************************************/
115	static char * device_type_str( enum device_types_e dev_type )
116	{
117	switch ( dev_type )
118	{
119	case DEV_TYPE_RAM_SCL: return "RAM_SCL";
120	case DEV_TYPE_ROM_SCL: return "ROM_SCL";
121	case DEV_TYPE_FBF_SCL: return "FBF_SCL";
122	case DEV_TYPE_IOB_TSR: return "IOB_TSR";
123	case DEV_TYPE_IOC_BDV: return "IOC_BDV";
124	case DEV_TYPE_IOC_HBA: return "IOC_HBA";
125	case DEV_TYPE_IOC_SDC: return "IOC_SDC";
126	case DEV_TYPE_IOC_SPI: return "IOC_SPI";
127	case DEV_TYPE_IOC_RDK: return "IOC_RDK";
128	case DEV_TYPE_MMC_TSR: return "MMC_TSR";
129	case DEV_TYPE_DMA_SCL: return "DMA_SCL";
130	case DEV_TYPE_NIC_CBF: return "NIC_CBF";
131	case DEV_TYPE_TIM_SCL: return "TIM_SCL";
132	case DEV_TYPE_TXT_TTY: return "TXT_TTY";
133	case DEV_TYPE_TXT_MTY: return "TXT_MTY";
134	case DEV_TYPE_ICU_XCU: return "ICU_XCU";
135	case DEV_TYPE_PIC_TSR: return "PIC_TSR";
136	default: return "undefined";
137	}
138	}
139	#endif
140
141	/************************************************************************************
142	* This function loads the arch_info.bin file into the boot cluster memory.
143	***********************************************************************************/
144	static void boot_archinfo_load( void )
145	{
146	archinfo_header_t * header = (archinfo_header_t*)ARCHINFO_BASE;
147
148	// Load file into memory
149	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
150	{
151	boot_printf("\n[BOOT ERROR]in %s : <%s> file not found\n",
152	__FUNCTION__, ARCHINFO_PATHNAME);
153	boot_exit();
154	}
155
156	if (header->signature != ARCHINFO_SIGNATURE)
157	{
158	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
159	"<%s> file signature should be %x\n",
160	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
161	boot_exit();
162	}
163
164	#if DEBUG_BOOT_INFO
165	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
166	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
167	#endif
168
169	} // boot_archinfo_load()
170
171	/**************************************************************************************
172	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
173	* analyzes it, and places the kcode and kdata segments at their final physical
174	* adresses (defined the .elf file), and set the kernel layout global variables.
175	*************************************************************************************/
176	static void boot_kernel_load( void )
177	{
178	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
179	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
180	uint32_t phdr_offset; // program header offset in kernel.elf file.
181	uint32_t segments_nb; // number of segments in kernel.elf file.
182	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
183	uint32_t seg_paddr; // segment local physical address of segment
184	uint32_t seg_offset; // segment offset in kernel.elf file
185	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
186	uint32_t seg_memsz; // segment size (bytes) in memory image.
187	bool_t kcode_found; // kcode segment found.
188	bool_t kdata_found; // kdata segment found.
189	uint32_t seg_id; // iterator for segments loop.
190
191	#if DEBUG_BOOT_ELF
192	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
193	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
194	#endif
195
196	// Load kernel.elf file into memory buffer
197	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
198	{
199	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
200	KERNEL_PATHNAME);
201	boot_exit();
202	}
203
204	// get pointer to kernel.elf header
205	elf_header = (Elf32_Ehdr*)KERN_BASE;
206
207	// check signature
208	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
209	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
210	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
211	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
212	{
213	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
214	"<%s> is not an ELF file\n",
215	KERNEL_PATHNAME);
216	boot_exit();
217	}
218
219	// Get program header table offset and number of segments
220	phdr_offset = elf_header->e_phoff;
221	segments_nb = elf_header->e_phnum;
222
223	// Get program header table pointer
224	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
225
226	// loop on segments
227	kcode_found = false;
228	kdata_found = false;
229	for (seg_id = 0; seg_id < segments_nb; seg_id++)
230	{
231	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
232	{
233	// Get segment attributes.
234	seg_paddr = program_header[seg_id].p_paddr;
235	seg_offset = program_header[seg_id].p_offset;
236	seg_filesz = program_header[seg_id].p_filesz;
237	seg_memsz = program_header[seg_id].p_memsz;
238
239	// get segment base address in buffer
240	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
241
242	// Load segment to its final physical memory address
243	boot_memcpy( (void*)seg_paddr,
244	(void*)seg_src_addr,
245	seg_filesz );
246
247	#if DEBUG_BOOT_ELF
248	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
249	" base = %x / size = %x\n",
250	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
251	#endif
252
253	// Fill remaining memory with zero if (filesz < memsz).
254	if( seg_memsz < seg_filesz )
255	{
256	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
257	}
258
259	// Note: we suppose that the 'kernel.elf' file contains exactly
260	// two loadable segments : kcode & kdata
261
262	if( program_header[seg_id].p_paddr == KCODE_BASE ) // kcode segment
263	{
264	if( kcode_found )
265	{
266	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
267	" two kcode segments found\n",
268	__FUNCTION__ , KERNEL_PATHNAME );
269	boot_exit();
270	}
271
272	kcode_found = true;
273	seg_kcode_base = seg_paddr;
274	seg_kcode_size = seg_memsz;
275	}
276	else // kdata segment
277	{
278	if( kdata_found )
279	{
280	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
281	" two kdata segments found\n",
282	__FUNCTION__ , KERNEL_PATHNAME );
283	boot_exit();
284	}
285
286	kdata_found = true;
287	seg_kdata_base = seg_paddr;
288	seg_kdata_size = seg_memsz;
289	}
290	}
291	}
292
293	// check kcode & kdata segments found
294	if( kcode_found == false )
295	{
296	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n",
297	__FUNCTION__ , KERNEL_PATHNAME );
298	boot_exit();
299	}
300	if( kdata_found == false )
301	{
302	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n",
303	__FUNCTION__ , KERNEL_PATHNAME );
304	boot_exit();
305	}
306
307	// check segments sizes
308	if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE )
309	{
310	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n",
311	__FUNCTION__ , KERNEL_PATHNAME );
312	}
313
314	// set entry point
315	kernel_entry = (uint32_t)elf_header->e_entry;
316
317	#if DEBUG_BOOT_ELF
318	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
319	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
320	#endif
321
322	} // boot_kernel_load()
323
324	/*************************************************************************************
325	* This function initializes the boot_info_t structure for a given cluster.
326	* @ boot_info : pointer to local boot_info_t structure
327	* @ cxy : cluster identifier
328	************************************************************************************/
329	static void boot_info_init( boot_info_t * boot_info,
330	cxy_t cxy )
331	{
332	archinfo_header_t * header;
333	archinfo_core_t * core_base;
334	archinfo_cluster_t * cluster_base;
335	archinfo_device_t * device_base;
336	archinfo_irq_t * irq_base;
337
338	archinfo_cluster_t * cluster;
339	archinfo_cluster_t * my_cluster = NULL; // target cluster
340	archinfo_cluster_t * io_cluster = NULL; // external peripherals cluster
341
342	archinfo_core_t * core;
343	uint32_t core_id;
344	archinfo_device_t * device;
345	uint32_t device_id;
346	archinfo_irq_t * irq;
347	uint32_t irq_id;
348	uint32_t end;
349	boot_device_t * boot_dev;
350
351	#if DEBUG_BOOT_INFO
352	boot_printf("\n[BOOT INFO] %s : enter at cycle %d\n",
353	__FUNCTION__ , boot_get_proctime() );
354	#endif
355
356	// get pointer on ARCHINFO header and on the four arch_info arrays
357	header = (archinfo_header_t*)ARCHINFO_BASE;
358	core_base = archinfo_get_core_base (header);
359	cluster_base = archinfo_get_cluster_base(header);
360	device_base = archinfo_get_device_base (header);
361	irq_base = archinfo_get_irq_base (header);
362
363	// Initialize global platform parameters
364	boot_info->x_size = header->x_size;
365	boot_info->y_size = header->y_size;
366	boot_info->x_width = header->x_width;
367	boot_info->y_width = header->y_width;
368	boot_info->paddr_width = header->paddr_width;
369	boot_info->io_cxy = header->io_cxy;
370
371	// Initialize kernel segments from global variables
372	boot_info->kcode_base = seg_kcode_base;
373	boot_info->kcode_size = seg_kcode_size;
374	boot_info->kdata_base = seg_kdata_base;
375	boot_info->kdata_size = seg_kdata_size;
376
377	// loop on arch_info clusters to build cluster_info[][] array
378	// and get io_cluster and my_cluster pointers
379	for (cluster = cluster_base;
380	cluster < &cluster_base[header->x_size * header->y_size];
381	cluster++)
382	{
383	int x = cluster->cxy >> Y_WIDTH;
384	int y = cluster->cxy & ((1 << Y_WIDTH) - 1);
385	boot_info->cluster_info[x][y] = (uint8_t)cluster->cores;
386
387	if( cluster->cxy == cxy ) my_cluster = cluster;
388	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
389	}
390
391	if( my_cluster == NULL )
392	{
393	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
394	__FUNCTION__ , cxy );
395	boot_exit();
396	}
397
398	if( io_cluster == NULL )
399	{
400	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
401	__FUNCTION__ , cxy );
402	boot_exit();
403	}
404
405	//////////////////////////////////////////////////////////
406	// initialize the boot_info array of external peripherals
407
408	#if DEBUG_BOOT_INFO
409	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
410	__FUNCTION__ , boot_get_proctime() );
411	#endif
412
413	device_id = 0;
414	for (device = &device_base[io_cluster->device_offset];
415	device < &device_base[io_cluster->device_offset + io_cluster->devices];
416	device++ )
417	{
418	if( device_id >= CONFIG_MAX_EXT_DEV )
419	{
420	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
421	__FUNCTION__ );
422	boot_exit();
423	}
424
425	// keep only external devices
426	if( (device->type != DEV_TYPE_RAM_SCL) &&
427	(device->type != DEV_TYPE_ICU_XCU) &&
428	(device->type != DEV_TYPE_MMC_TSR) &&
429	(device->type != DEV_TYPE_DMA_SCL) &&
430	(device->type != DEV_TYPE_TXT_MTY) &&
431	(device->type != DEV_TYPE_IOC_SPI) )
432	{
433	boot_dev = &boot_info->ext_dev[device_id];
434
435	boot_dev->type = device->type;
436	boot_dev->base = device->base;
437	boot_dev->channels = device->channels;
438	boot_dev->param0 = device->arg0;
439	boot_dev->param1 = device->arg1;
440	boot_dev->param2 = device->arg2;
441	boot_dev->param3 = device->arg3;
442	boot_dev->irqs = device->irqs;
443
444	device_id++;
445
446	#if DEBUG_BOOT_INFO
447	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
448	device_type_str(device->type), device->base, device->size, device->channels, device->irqs );
449	#endif
450	}
451
452	// handle IRQs for PIC
453	if (device->type == DEV_TYPE_PIC_TSR)
454	{
455	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
456	{
457	boot_dev->irq[irq_id].valid = 0;
458	}
459
460	for (irq = &irq_base[device->irq_offset];
461	irq < &irq_base[device->irq_offset + device->irqs];
462	irq++)
463	{
464	boot_dev->irq[irq->port].valid = 1;
465	boot_dev->irq[irq->port].dev_type = irq->dev_type;
466	boot_dev->irq[irq->port].channel = irq->channel;
467	boot_dev->irq[irq->port].is_rx = irq->is_rx;
468
469	#if DEBUG_BOOT_INFO
470	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
471	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
472	#endif
473	}
474	}
475	} // end loop on io_cluster peripherals
476
477	// initialize number of external peripherals
478	boot_info->ext_dev_nr = device_id;
479
480	// Initialize cluster specific resources
481	boot_info->cxy = my_cluster->cxy;
482
483	#if DEBUG_BOOT_INFO
484	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
485	#endif
486
487	////////////////////////////////////////
488	// Initialize array of core descriptors
489	core_id = 0;
490	for (core = &core_base[my_cluster->core_offset];
491	core < &core_base[my_cluster->core_offset + my_cluster->cores];
492	core++ )
493	{
494	boot_info->core[core_id].gid = (gid_t)core->gid;
495	boot_info->core[core_id].lid = (lid_t)core->lid;
496	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
497
498	#if DEBUG_BOOT_INFO
499	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
500	core->gid , core->cxy , core->lid );
501	#endif
502	core_id++;
503	}
504
505	// Initialize number of cores in my_cluster
506	boot_info->cores_nr = core_id;
507
508	//////////////////////////////////////////////////////////////////////
509	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
510
511	#if DEBUG_BOOT_INFO
512	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n",
513	__FUNCTION__ , cxy );
514	#endif
515
516	device_id = 0;
517	for (device = &device_base[my_cluster->device_offset];
518	device < &device_base[my_cluster->device_offset + my_cluster->devices];
519	device++ )
520	{
521	// keep only internal devices
522	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
523	(device->type == DEV_TYPE_ICU_XCU) \|\|
524	(device->type == DEV_TYPE_MMC_TSR) \|\|
525	(device->type == DEV_TYPE_DMA_SCL) \|\|
526	(device->type == DEV_TYPE_TXT_MTY) \|\|
527	(device->type == DEV_TYPE_IOC_SPI) )
528	{
529	if (device->type == DEV_TYPE_RAM_SCL) // RAM
530	{
531	// set number of physical memory pages
532	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
533
534	#if DEBUG_BOOT_INFO
535	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
536	#endif
537	}
538	else // ICU / MMC / DMA / MTY
539	{
540	if( device_id >= CONFIG_MAX_INT_DEV )
541	{
542	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
543	__FUNCTION__ , cxy );
544	boot_exit();
545	}
546
547	boot_dev = &boot_info->int_dev[device_id];
548
549	boot_dev->type = device->type;
550	boot_dev->base = device->base;
551	boot_dev->channels = device->channels;
552	boot_dev->param0 = device->arg0;
553	boot_dev->param1 = device->arg1;
554	boot_dev->param2 = device->arg2;
555	boot_dev->param3 = device->arg3;
556	boot_dev->irqs = device->irqs;
557
558	device_id++;
559
560	#if DEBUG_BOOT_INFO
561	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
562	device_type_str( device->type ) , device->base , device->size ,
563	device->channels , device->irqs );
564	#endif
565
566	// handle IRQs for ICU
567	if (device->type == DEV_TYPE_ICU_XCU)
568	{
569	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
570	{
571	boot_dev->irq[irq_id].valid = 0;
572	}
573
574	for (irq = &irq_base[device->irq_offset];
575	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
576	{
577	boot_dev->irq[irq->port].valid = 1;
578	boot_dev->irq[irq->port].dev_type = irq->dev_type;
579	boot_dev->irq[irq->port].channel = irq->channel;
580	boot_dev->irq[irq->port].is_rx = irq->is_rx;
581
582	#if DEBUG_BOOT_INFO
583	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
584	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
585	#endif
586
587	}
588	}
589	}
590	}
591	} // end loop on local peripherals
592
593	// initialize number of internal peripherals
594	boot_info->int_dev_nr = device_id;
595
596	// Get the top address of the kernel segments
597	end = boot_info->kdata_base + boot_info->kdata_size;
598
599	// compute number of physical pages occupied by the kernel code
600	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
601	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
602
603	// no reserved zones for TSAR architecture
604	boot_info->rsvd_nr = 0;
605
606	// set boot_info signature
607	boot_info->signature = BOOT_INFO_SIGNATURE;
608
609	} // boot_info_init()
610
611	/***********************************************************************************
612	* This function check the local boot_info_t structure for a given core.
613	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
614	* @ lid : core local identifier, index the core descriptor table.
615	**********************************************************************************/
616	static void boot_check_core( boot_info_t * boot_info,
617	lid_t lid)
618	{
619	gid_t gid; // global hardware identifier of this core
620	boot_core_t * this; // BOOT_INFO core descriptor of this core.
621
622	// Get core hardware identifier
623	gid = (gid_t)boot_get_procid();
624
625	// get pointer on core descriptor
626	this = &boot_info->core[lid];
627
628	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
629	{
630	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
631	" - boot_info cxy = %x\n"
632	" - boot_info lid = %d\n"
633	" - boot_info gid = %x\n"
634	" - actual gid = %x\n",
635	this->cxy , this->lid , this->gid , gid );
636	boot_exit();
637	}
638
639	} // boot_check_core()
640
641	/*********************************************************************************
642	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
643	* It returns the number of CP0s actually activated.
644	********************************************************************************/
645	static uint32_t boot_wake_all_cp0s( void )
646	{
647	archinfo_header_t* header; // Pointer on ARCHINFO header
648	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
649	archinfo_cluster_t* cluster; // Iterator for loop on clusters
650	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
651	archinfo_device_t* device; // Iterator for loop on devices
652	uint32_t cp0_nb = 0; // CP0s counter
653
654	header = (archinfo_header_t*)ARCHINFO_BASE;
655	cluster_base = archinfo_get_cluster_base(header);
656	device_base = archinfo_get_device_base (header);
657
658	// loop on all clusters
659	for (cluster = cluster_base;
660	cluster < &cluster_base[header->x_size * header->y_size];
661	cluster++)
662	{
663	// Skip boot cluster.
664	if (cluster->cxy == BOOT_CORE_CXY)
665	continue;
666
667	// Skip clusters without core (thus without CP0).
668	if (cluster->cores == 0)
669	continue;
670
671	// Skip clusters without device (thus without XICU).
672	if (cluster->devices == 0)
673	continue;
674
675	// search XICU device associated to CP0, and send a WTI to activate it
676	for (device = &device_base[cluster->device_offset];
677	device < &device_base[cluster->device_offset + cluster->devices];
678	device++)
679	{
680	if (device->type == DEV_TYPE_ICU_XCU)
681	{
682
683	#if DEBUG_BOOT_WAKUP
684	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
685	cluster->cxy , boot_get_proctime );
686	#endif
687
688	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
689	cp0_nb++;
690	}
691	}
692	}
693	return cp0_nb;
694
695	} // boot_wake_cp0()
696
697	/*********************************************************************************
698	* This function is called by all CP0s to activate the other CPi cores.
699	* @ boot_info : pointer to local 'boot_info_t' structure.
700	*********************************************************************************/
701	static void boot_wake_local_cores(boot_info_t * boot_info)
702	{
703	unsigned int core_id;
704
705	// get pointer on XCU device descriptor in boot_info
706	boot_device_t * xcu = &boot_info->int_dev[0];
707
708	// loop on cores
709	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
710	{
711
712	#if DEBUG_BOOT_WAKUP
713	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
714	boot_info->cxy , core_id , boot_get_proctime() );
715	#endif
716	// send an IPI
717	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
718	}
719	} // boot_wake_local_cores()
720
721	/*********************************************************************************
722	* This function is called by all core[cxy][0] to initialize the Boot Page Table:
723	* map two local big pages for the boot code and kernel code.
724	* @ cxy : local cluster identifier.
725	*********************************************************************************/
726	void boot_page_table_init( cxy_t cxy )
727	{
728	// set PTE1 in slot[0] for kernel code
729	uint32_t kernel_attr = 0x8A800000; // flagss : V,C,X,G
730	uint32_t kernel_ppn1 = (cxy << 20) >> 9; // big physical page index == 0
731	boot_pt[0] = kernel_attr \| kernel_ppn1;
732
733	// set PTE1 in slot[1] for boot code (no global flag)
734	uint32_t boot_attr = 0x8A000000; // flags : V,C,X
735	uint32_t boot_ppn1 = ((cxy << 20) + 512) >> 9; // big physical page index == 1
736	boot_pt[1] = boot_attr \| boot_ppn1;
737	}
738
739	/*********************************************************************************
740	* This function is called by all cores to activate the instruction MMU,
741	* and use the local copy of boot code.
742	*********************************************************************************/
743	void boot_activate_ins_mmu( cxy_t cxy )
744	{
745	// set mmu_ptpr register
746	uint32_t ptpr = ((uint32_t)boot_pt >> 13) \| (cxy << 19);
747	asm volatile ( "mtc2 %0, $0 \n" : : "r" (ptpr) );
748
749	// set ITLB bit in mmu_mode
750	asm volatile ( "mfc2 $26, $1 \n"
751	"ori $26, $26, 0x8 \n"
752	"mtc2 $26, $1 \n" );
753	}
754
755	/*********************************************************************************
756	* This main function of the boot-loader is called by the boot_entry()
757	* function, and executed by all cores.
758	* The arguments values are computed by the boot_entry code.
759	* @ lid : core local identifier,
760	* @ cxy : cluster identifier,
761	*********************************************************************************/
762	void boot_loader( lid_t lid,
763	cxy_t cxy )
764	{
765	boot_info_t * boot_info; // pointer on local boot_info_t structure
766
767	if (lid == 0)
768	{
769	/**********************************i********************
770	* PHASE Sequencial : only core[0][0] executes it
771	**********************************************************/
772	if (cxy == 0)
773	{
774	boot_printf("\n[BOOT] core[%x,%d] active at cycle %d\n",
775	cxy, lid, boot_get_proctime() );
776
777	// Initialize IOC driver
778	if (USE_IOC_BDV) boot_bdv_init();
779	else if (USE_IOC_HBA) boot_hba_init();
780	// else if (USE_IOC_SDC) boot_sdc_init();
781	// else if (USE_IOC_SPI) boot_spi_init();
782	else if (!USE_IOC_RDK)
783	{
784	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
785	boot_exit();
786	}
787
788	// Initialize FAT32.
789	boot_fat32_init();
790
791	// Load the 'kernel.elf' file into memory from IOC, and set
792	// the global variables defining the kernel layout
793	boot_kernel_load();
794
795	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
796	cxy , lid , boot_get_proctime() );
797
798	// Load the arch_info.bin file into memory.
799	boot_archinfo_load();
800
801	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
802	cxy , lid , boot_get_proctime() );
803
804	// Get local boot_info_t structure base address.
805	// It is the first structure in the .kdata segment.
806	boot_info = (boot_info_t *)seg_kdata_base;
807
808	// Initialize local boot_info_t structure.
809	boot_info_init( boot_info , cxy );
810
811	boot_printf("\n[BOOT] core[%x,%d] initialised boot_info at cycle %d\n",
812	cxy , lid , boot_get_proctime() );
813
814	// check boot_info signature
815	if (boot_info->signature != BOOT_INFO_SIGNATURE)
816	{
817	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
818	" illegal boot_info signature / should be %x\n",
819	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
820	boot_exit();
821	}
822
823	// Check core information.
824	boot_check_core(boot_info, lid);
825
826	// identity maps two big pages for the boot and kernel code,
827	boot_page_table_init( 0 );
828
829	// activate the instruction MMU to use the local copy of boot code
830	boot_activate_ins_mmu( 0 );
831
832	// Activate other core[cxy][0] / get number of activated cores
833	active_cores_nr = boot_wake_all_cp0s() + 1;
834
835	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
836	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
837	active_cores_nr );
838
839	// activate other local cores
840	boot_wake_local_cores( boot_info );
841
842	// Wait until all local cores in cluster ready
843	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
844	boot_info->cores_nr );
845	}
846	/**************************************************************************
847	* PHASE partially parallel : all core[cxy][0] with (cxy != 0) execute it
848	**************************************************************************/
849	else
850	{
851	// at this point, the DATA extension registers point
852	// already on the local cluster cxy to use the local stack,
853	// but all cores must access the code stored in cluster 0
854
855	#if DEBUG_BOOT_MULTI
856	boot_printf("\n[BOOT] core[%x,%d] active at cycle %d\n",
857	cxy, lid, boot_get_proctime() );
858	#endif
859	// Each core[cxy][0] copies the boot code (data and instructions)
860	// from the cluster 0 to the local cluster.
861	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
862	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
863	BOOT_MAX_SIZE );
864
865	// from now, it is safe to refer to the boot global variables
866	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
867	cxy , lid , boot_get_proctime() );
868
869	// identity maps two big pages for the boot and kernel code,
870	boot_page_table_init( cxy );
871
872	// activate the instruction MMU to use the local copy of boot code
873	boot_activate_ins_mmu( cxy );
874
875	// Each CP0 copies the arch_info.bin into the local memory.
876	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
877	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
878	ARCHINFO_MAX_SIZE );
879
880	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
881	cxy , lid , boot_get_proctime() );
882
883	// copy the kcode segment into local memory
884	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
885	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
886	seg_kcode_size );
887
888	// Each CP0 copies the kdata segment into local memory
889	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
890	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
891	seg_kdata_size );
892
893	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
894	cxy , lid , boot_get_proctime() );
895
896	// Each CP0 get local boot_info_t structure base address.
897	boot_info = (boot_info_t*)seg_kdata_base;
898
899	// Each CP0 initializes local boot_info_t structure.
900	boot_info_init( boot_info , cxy );
901
902	boot_printf("\n[BOOT] core[%x,%d] initialised boot_info at cycle %d\n",
903	cxy , lid , boot_get_proctime() );
904
905	// Each CP0 checks core information.
906	boot_check_core( boot_info , lid );
907
908	// Each CP0 get number of active clusters from BOOT_CORE cluster
909	uint32_t count = boot_remote_lw( XPTR( 0 , &active_cores_nr ) );
910
911	// Wait until all clusters (i.e all CP0s) ready
912	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
913
914	// activate other local cores
915	boot_wake_local_cores( boot_info );
916
917	// Wait until all local cores in cluster ready
918	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
919	boot_info->cores_nr );
920	}
921	}
922	else
923	{
924	/***********************************************************************
925	* PHASE fully parallel : all cores[cxy][lid] with (lid! = 0) execute it
926	**********************************************************************/
927
928	#if DEBUG_BOOT_MULTI
929	boot_printf("\n[BOOT] core[%x,%d] active at cycle %d\n",
930	cxy, lid, boot_get_proctime() );
931	#endif
932	// activate the instruction MMU to use the local copy of the boot code
933	boot_activate_ins_mmu( cxy );
934
935	// Get local boot_info_t structure base address.
936	boot_info = (boot_info_t *)seg_kdata_base;
937
938	// Check core information
939	boot_check_core(boot_info, lid);
940
941	// Wait until all local cores in cluster ready
942	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
943	}
944
945	// All cores enter the kernel_init() function. The address is contained in
946	// the "kernel_entry" global variable, set by boot_kernel_load() function.
947	// Each core initialise the following registers before jumping to kernel:
948	// - gr_29 : stack pointer / kernel stack allocated in idle thread descriptor,
949	// - c0_sr : status register / reset BEV bit
950	// - gr_04 : kernel_init() argument / pointer on boot_info structure
951	// The array of idle-thread descriptors is allocated in the kdata segment,
952	// just after the boot_info structure.
953
954	#if DEBUG_BOOT_MULTI
955	boot_printf("\n[BOOT] core[%x,%d] jump to kernel_init = %x at cycle %d\n",
956	cxy, lid, kernel_entry, boot_get_proctime() );
957	#endif
958
959	uint32_t base;
960	uint32_t offset = sizeof( boot_info_t );
961	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
962	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
963	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
964	else base = seg_kdata_base + offset;
965	uint32_t sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
966
967	asm volatile( "mfc0 $27, $12 \n"
968	"lui $26, 0xFFBF \n"
969	"ori $26, $26, 0xFFFF \n"
970	"and $27, $27, $26 \n"
971	"mtc0 $27, $12 \n"
972	"move $4, %0 \n"
973	"move $29, %1 \n"
974	"jr %2 \n"
975	:
976	: "r"(boot_info) ,
977	"r"(sp) ,
978	"r"(kernel_entry)
979	: "$26" , "$27" , "$29" , "$4" );
980
981
982	} // boot_loader()

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