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source: trunk/tools/bootloader_tsar/boot.c @ 8

Last change on this file since 8 was 6, checked in by alain, 8 years ago
Modify the boot_info_t struct to describe external peripherals in all clusters.
File size: 36.3 KB

Line
1	/*
2	* boot.c - TSAR bootloader implementation.
3	*
4	* Authors : Alain Greiner / Vu Son (2016)
5	*
6	* Copyright (c) UPMC Sorbonne Universites
7	*
8	* This file is part of ALMOS-MKH.
9	*
10	* ALMOS-MKH is free software; you can redistribute it and/or modify it
11	* under the terms of the GNU General Public License as published by
12	* the Free Software Foundation; version 2.0 of the License.
13	*
14	* ALMOS-MKH is distributed in the hope that it will be useful, but
15	* WITHOUT ANY WARRANTY; without even the implied warranty of
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17	* General Public License for more details.
18	*
19	* You should have received a copy of the GNU General Public License
20	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
21	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22	*/
23
24	/****************************************************************************
25	* This file contains the ALMOS-MKH. boot-loader for the TSAR architecture. *
26	* *
27	* It supports clusterised shared memory multi-processor architectures, *
28	* where each processor 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 and is loaded into memory by bscpu (whose index is [0,0]), *
33	* executing the generic preloader. *
34	* *
35	* 1) The boot-loader first phase is executed by bscpu only, while *
36	* all other cores are waiting in the preloader. *
37	* It does the following tasks: *
38	* - load into the memory bank of cluster (0,0) the 'arch_info.bin' *
39	* file (containing the hardware architecture description) and the *
40	* 'kernel.elf' file, at temporary locations, *
41	* - initializes the 'boot_info_t' structure in cluster(0,0) *
42	* (there is 1 'boot_info_t' per cluster), which contains both *
43	* global and cluster specific information that will be used for *
44	* kernel initialisation. *
45	* - activate CP0s in all other clusters, using IPIs. *
46	* - wait completion reports from CP0s on a global barrier. *
47	* *
48	* 2) The boot-loader second phase is then executed in parallel by all *
49	* CP0s (other than bscpu). Each CP0 performs the following tasks: *
50	* - copies into the memory bank of the local cluster the 'boot.elf', *
51	* the 'arch_info.bin' (at the same addresses as the 'boot.elf' and *
52	* the 'arch_info.bin' in the memory bank of the cluster(0,0), and *
53	* the kernel image (at address 0x0), *
54	* - initializes the 'boot_info_t' structure of the local cluster, *
55	* - activate all other cores in the same cluster (CPi). *
56	* - wait local CPi completion reports on a local barrier. *
57	* - report completion to bscpu on the global barrier. *
58	* *
59	* 3) The boot-loader third phase is executed in parallel by all cores. *
60	* After passing the global barrier the bscpu: *
61	* - activates the CPi of cluster(0,0), *
62	* - blocks on the local barrier waiting for all local CPi to report *
63	* completion on the local barrier, *
64	* - moves the local kernel image from the temporary location to the *
65	* address 0x0, (erasing the preloader code). *
66	* *
67	* 4) All cores have finished the boot phase, they jump to the kern_init() *
68	* function (maybe not at the same time). *
69	****************************************************************************/
70
71	#include <elf-types.h>
72	#include <hal_types.h>
73
74	#include <almos_config.h>
75	#include <boot_config.h>
76
77	#include <arch_info.h>
78	#include <boot_info.h>
79
80	#include <boot_utils.h>
81	#include <boot_fat32.h>
82	#include <boot_bdv_driver.h>
83	#include <boot_hba_driver.h>
84	#include <boot_tty_driver.h>
85
86	/*****************************************************************************
87	* Macros.
88	****************************************************************************/
89
90	#define PAGE_ROUND_DOWN(x) ((x) & (~PPM_PAGE_SIZE -1))
91	#define PAGE_ROUND_UP(x) (((x) + PPM_PAGE_SIZE-1) & \
92	(~(PPM_PAGE_SIZE-1)))
93
94	/*****************************************************************************
95	* Global variables.
96	****************************************************************************/
97
98	// synchronization variables.
99
100	volatile boot_remote_spinlock_t tty0_lock; // protect TTY0 access
101	volatile boot_remote_barrier_t global_barrier; // synchronize CP0 cores
102	volatile boot_remote_barrier_t local_barrier; // synchronize cores in one cluster
103	uint32_t active_cp0s_nr; // number of expected CP0s
104
105	// kernel segments layout variables
106
107	uint32_t seg_kcode_base; // kcode segment base address
108	uint32_t seg_kcode_size; // kcode segment size (bytes)
109	uint32_t seg_kdata_base; // kdata segment base address
110	uint32_t seg_kdata_size; // kdata segment size (bytes)
111	uint32_t kernel_entry; // kernel entry point
112
113	// address used by the WTI to activate remote CP0s
114
115	extern void boot_entry(); // boot_loader entry point
116
117	/*********************************************************************************
118	* This function returns the printable string for each device type
119	********************************************************************************/
120	char * device_type_str( uint32_t dev_type )
121	{
122	if ( dev_type == DEV_TYPE_RAM_SCL ) return "RAM_SCL";
123	else if( dev_type == DEV_TYPE_ROM_SCL ) return "ROM_SCL";
124	else if( dev_type == DEV_TYPE_FBF_SCL ) return "FBF_SCL";
125	else if( dev_type == DEV_TYPE_IOB_TSR ) return "IOB_TSR";
126	else if( dev_type == DEV_TYPE_IOC_BDV ) return "IOC_BDV";
127	else if( dev_type == DEV_TYPE_IOC_HBA ) return "IOC_HBA";
128	else if( dev_type == DEV_TYPE_IOC_SDC ) return "IOC_SDC";
129	else if( dev_type == DEV_TYPE_IOC_SPI ) return "IOC_SPI";
130	else if( dev_type == DEV_TYPE_IOC_RDK ) return "IOC_RDK";
131	else if( dev_type == DEV_TYPE_MMC_TSR ) return "MMC_TSR";
132	else if( dev_type == DEV_TYPE_DMA_SCL ) return "DMA_SCL";
133	else if( dev_type == DEV_TYPE_NIC_CBF ) return "NIC_CBF";
134	else if( dev_type == DEV_TYPE_TIM_SCL ) return "TIM_SCL";
135	else if( dev_type == DEV_TYPE_TXT_TTY ) return "TXT_TTY";
136	else if( dev_type == DEV_TYPE_ICU_XCU ) return "ICU_XCU";
137	else if( dev_type == DEV_TYPE_PIC_TSR ) return "PIC_TSR";
138	else return "undefined";
139	}
140
141	/************************************************************************************
142	* This function loads the arch_info.bin file into the boot cluster memory.
143	***********************************************************************************/
144	static void boot_archinfo_load()
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]: boot_archinfo_load(): "
152	"<%s> file not found\n",
153	ARCHINFO_PATHNAME);
154	boot_exit();
155	}
156
157	if (header->signature != ARCHINFO_SIGNATURE)
158	{
159	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
160	"<%s> file signature should be %x\n",
161	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
162	boot_exit();
163	}
164
165	#if DEBUG_BOOT_INFO
166	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
167	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
168	#endif
169
170	} // boot_archinfo_load()
171
172	/**************************************************************************************
173	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
174	* analyzes it, and places the the two seg_kcode & seg_kdata segments at their final
175	* physical adresses (just after the preloader zone).
176	* It set the global variables defining the kernel layout.
177	*************************************************************************************/
178	static void boot_kernel_load()
179	{
180	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
181	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
182	uint32_t phdr_offset; // program header offset in kernel.elf file.
183	uint32_t segments_nb; // number of segments in kernel.elf file.
184	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
185	uint32_t seg_paddr; // segment local physical address of segment
186	uint32_t seg_offset; // segment offset in kernel.elf file
187	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
188	uint32_t seg_memsz; // segment size (bytes) in memory image.
189	bool_t kcode_found; // kcode segment found.
190	bool_t kdata_found; // kdata segment found.
191	uint32_t seg_id; // iterator for segments loop.
192
193	#if DEBUG_BOOT_ELF
194	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
195	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
196	#endif
197
198	// Load kernel.elf file into memory buffer
199	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
200	{
201	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
202	KERNEL_PATHNAME);
203	boot_exit();
204	}
205
206	// get pointer to kernel.elf header
207	elf_header = (Elf32_Ehdr*)KERN_BASE;
208
209	// check signature
210	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
211	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
212	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
213	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
214	{
215	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
216	"<%s> is not an ELF file\n",
217	KERNEL_PATHNAME);
218	boot_exit();
219	}
220
221	// Get program header table offset and number of segments
222	phdr_offset = elf_header->e_phoff;
223	segments_nb = elf_header->e_phnum;
224
225	// Get program header table pointer
226	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
227
228	// loop on segments
229	kcode_found = false;
230	kdata_found = false;
231	for (seg_id = 0; seg_id < segments_nb; seg_id++)
232	{
233	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
234	{
235	// Get segment attributes.
236	seg_paddr = program_header[seg_id].p_paddr;
237	seg_offset = program_header[seg_id].p_offset;
238	seg_filesz = program_header[seg_id].p_filesz;
239	seg_memsz = program_header[seg_id].p_memsz;
240
241	// get segment base address in buffer
242	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
243
244	// Load segment to its final physical memory address
245	boot_memcpy( (void*)seg_paddr,
246	(void*)seg_src_addr,
247	seg_filesz );
248
249	#if DEBUG_BOOT_ELF
250	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
251	" base = %x / size = %x\n",
252	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
253	#endif
254
255	// Fill remaining memory with zero if (filesz < memsz).
256	if( seg_memsz < seg_filesz )
257	{
258	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
259	}
260
261	// Note: we suppose that the 'kernel.elf' file contains only 2
262	// loadable segments ktext & kdata and that the main
263	// difference between these two is the WRITE permission: ktext
264	// contains read-only instructions and read_only data,
265	// while kdata contains writable data.
266
267	if ((program_header[seg_id].p_flags & PF_W) == 0) // kcode segment
268	{
269	if( kcode_found )
270	{
271	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
272	" two loadable kcode segments found\n",
273	__FUNCTION__ , KERNEL_PATHNAME );
274	boot_exit();
275	}
276
277	kcode_found = true;
278	seg_kcode_base = seg_paddr;
279	seg_kcode_size = seg_memsz;
280	}
281	else // kdata segment
282	{
283	if( kdata_found )
284	{
285	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
286	" two loadable kdata segments found\n",
287	__FUNCTION__ , KERNEL_PATHNAME );
288	boot_exit();
289	}
290
291	kdata_found = true;
292	seg_kdata_base = seg_paddr;
293	seg_kdata_size = seg_memsz;
294	}
295	}
296	}
297
298	// check kcode & kdata segments found
299	if( kcode_found == false )
300	{
301	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
302	" kcode segment not found\n",
303	__FUNCTION__ , KERNEL_PATHNAME );
304	boot_exit();
305	}
306	if( kdata_found == false )
307	{
308	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
309	" kdata segment not found\n",
310	__FUNCTION__ , KERNEL_PATHNAME );
311	boot_exit();
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 successfully 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; // cluster containing ext. peripherals
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
349	boot_device_t * boot_dev;
350
351	#if DEBUG_BOOT_INFO
352	boot_printf("\n[BOOT INFO] %s : enter for cluster %x at cycle %d\n",
353	__FUNCTION__ , cxy , 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
372	boot_info->kernel_code_start = seg_kcode_base;
373	boot_info->kernel_code_end = seg_kcode_base + seg_kcode_size;
374	boot_info->kernel_data_start = seg_kdata_base;
375	boot_info->kernel_data_end = seg_kdata_base + seg_kdata_size;
376
377	// loop on arch_info clusters to get relevant pointers
378	for (cluster = cluster_base;
379	cluster < &cluster_base[header->x_size * header->y_size];
380	cluster++)
381	{
382	if( cluster->cxy == cxy ) my_cluster = cluster;
383	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
384	}
385
386	if( my_cluster == NULL )
387	{
388	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
389	__FUNCTION__ , cxy );
390	boot_exit();
391	}
392
393	if( io_cluster == NULL )
394	{
395	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
396	__FUNCTION__ , header->io_cxy );
397	boot_exit();
398	}
399
400	// loop on all arch-info peripherals in IO_cluster,
401	// to initialize the boot_info array of external peripherals
402
403	#if DEBUG_BOOT_INFO
404	boot_printf("\n[BOOT INFO] %s : External peripherals\n", __FUNCTION__ );
405	#endif
406
407	device_id = 0;
408	for (device = &device_base[io_cluster->device_offset];
409	device < &device_base[io_cluster->device_offset + io_cluster->devices];
410	device++ )
411	{
412	// initialise one entry for each external peripheral
413	if( (device->type != DEV_TYPE_RAM_SCL) &&
414	(device->type != DEV_TYPE_ICU_XCU) &&
415	(device->type != DEV_TYPE_MMC_TSR) &&
416	(device->type != DEV_TYPE_DMA_SCL) )
417	{
418	boot_dev = &boot_info->ext_dev[device_id];
419
420	boot_dev->type = device->type;
421	boot_dev->base = device->base;
422	boot_dev->size = device->size;
423	boot_dev->channels = device->channels;
424	boot_dev->param0 = device->arg0;
425	boot_dev->param1 = device->arg1;
426	boot_dev->param2 = device->arg2;
427	boot_dev->param3 = device->arg3;
428	boot_dev->irqs = device->irqs;
429
430	device_id++;
431	}
432
433	#if DEBUG_BOOT_INFO
434	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
435	device_type_str( device->type ) , device->base , device->size ,
436	device->channels , device->irqs );
437	#endif
438
439	// Initialize array of irq descriptors for PIC
440	if (device->type == DEV_TYPE_PIC_TSR)
441	{
442	for (irq_id = 0; irq_id < CONFIG_MAX_IRQS_PER_PIC; irq_id++)
443	{
444	boot_dev->irq[irq_id].valid = 0;
445	}
446
447	for (irq = &irq_base[device->irq_offset];
448	irq < &irq_base[device->irq_offset + device->irqs];
449	irq++)
450	{
451	boot_dev->irq[irq->port].valid = 1;
452	boot_dev->irq[irq->port].dev_type = irq->dev_type;
453	boot_dev->irq[irq->port].channel = irq->channel;
454	boot_dev->irq[irq->port].is_rx = irq->is_rx;
455
456	#if DEBUG_BOOT_INFO
457	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
458	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
459	#endif
460	}
461	}
462	}
463
464	// initialize number of external peripherals
465	boot_info->ext_dev_nr = device_id;
466
467	// Initialize cluster specific resources
468	boot_info->cxy = my_cluster->cxy;
469
470	#if DEBUG_BOOT_INFO
471	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ );
472	#endif
473
474	// Initialize array of core descriptors
475	core_id = 0;
476	for (core = &core_base[my_cluster->core_offset];
477	core < &core_base[my_cluster->core_offset + my_cluster->cores];
478	core++ )
479	{
480	boot_info->core[core_id].gid = (gid_t)core->gid;
481	boot_info->core[core_id].lid = (lid_t)core->lid;
482	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
483
484	#if DEBUG_BOOT_INFO
485	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
486	core->gid , core->cxy , core->lid );
487	#endif
488	core_id++;
489	}
490
491	// Initialize number of cores in my_cluster
492	boot_info->cores_nr = core_id;
493
494	// loop on all peripherals in my_cluster to initialise
495	// boot_info array of internal peripherals in my_cluster
496
497	#if DEBUG_BOOT_INFO
498	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ );
499	#endif
500
501	device_id = 0;
502	for (device = &device_base[my_cluster->device_offset];
503	device < &device_base[my_cluster->device_offset + my_cluster->devices];
504	device++ )
505	{
506	// initialise one entry for each internal peripheral
507	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
508	(device->type == DEV_TYPE_ICU_XCU) \|\|
509	(device->type == DEV_TYPE_MMC_TSR) \|\|
510	(device->type == DEV_TYPE_DMA_SCL) )
511	{
512	boot_dev = &boot_info->int_dev[device_id];
513
514	boot_dev->type = device->type;
515	boot_dev->base = device->base;
516	boot_dev->size = device->size;
517	boot_dev->channels = device->channels;
518	boot_dev->param0 = device->arg0;
519	boot_dev->param1 = device->arg1;
520	boot_dev->param2 = device->arg2;
521	boot_dev->param3 = device->arg3;
522	boot_dev->irqs = device->irqs;
523
524	device_id++;
525	}
526
527	#if DEBUG_BOOT_INFO
528	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
529	device_type_str( device->type ) , device->base , device->size ,
530	device->channels , device->irqs );
531	#endif
532
533	// Initialize information about physical memory in cluster
534	if (device->type == DEV_TYPE_RAM_SCL)
535	{
536	// Compute total number of physical memory pages in cluster
537	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
538
539	// Get the last address allocated for the kernel segments
540	uint32_t end;
541	if( boot_info->kernel_code_end > boot_info->kernel_data_end )
542	{
543	end = boot_info->kernel_code_end;
544	}
545	else
546	{
547	end = boot_info->kernel_data_end;
548	}
549
550	// Compute the number of pages allocated for the kernel.
551	if( (end & CONFIG_PPM_PAGE_MASK) == 0 )
552	{
553	boot_info->pages_offset = end >> CONFIG_PPM_PAGE_SHIFT;
554	}
555	else
556	{
557	boot_info->pages_offset = (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
558	}
559
560	#if DEBUG_BOOT_INFO
561	boot_printf(" . physical memory : %x pages / first free page = %x\n",
562	boot_info->pages_nr , boot_info->pages_offset );
563	#endif
564	}
565
566	// Initialize array of irq descriptors for XCU
567	if (device->type == DEV_TYPE_ICU_XCU)
568	{
569	for (irq_id = 0; irq_id < CONFIG_MAX_HWIS_PER_ICU; 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];
576	irq++)
577	{
578	boot_dev->irq[irq->port].valid = 1;
579	boot_dev->irq[irq->port].dev_type = irq->dev_type;
580	boot_dev->irq[irq->port].channel = irq->channel;
581	boot_dev->irq[irq->port].is_rx = irq->is_rx;
582
583	#if DEBUG_BOOT_INFO
584	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
585	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
586	#endif
587
588	}
589	}
590	}
591
592	// initialize number of internal peripherals in my_cluster
593	boot_info->int_dev_nr = device_id;
594
595	// set boot_info signature
596	boot_info->signature = BOOT_INFO_SIGNATURE;
597
598	} // boot_info_init()
599
600	/***********************************************************************************
601	* This function check the local boot_info_t structure for a given core.
602	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
603	* @ lid : core local identifier, index the core descriptor table.
604	**********************************************************************************/
605	static void boot_check_core( boot_info_t * boot_info,
606	lid_t lid)
607	{
608	gid_t gid; // global hardware identifier of this core
609	boot_core_t * this; // BOOT_INFO core descriptor of this core.
610
611	// Get core hardware identifier
612	gid = (gid_t)boot_get_procid();
613
614	// get pointer on core descriptor
615	this = &boot_info->core[lid];
616
617	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
618	{
619	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
620	" - boot_info cxy = %x\n"
621	" - boot_info lid = %d\n"
622	" - boot_info gid = %x\n"
623	" - actual gid = %x\n",
624	this->cxy , this->lid , this->gid , gid );
625	boot_exit();
626	}
627
628	} // boot_check_core()
629
630	/*********************************************************************************
631	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
632	* It returns the number of CP0s actually activated.
633	********************************************************************************/
634	static uint32_t boot_wake_all_cp0s()
635	{
636	archinfo_header_t* header; // Pointer on ARCHINFO header
637	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
638	archinfo_cluster_t* cluster; // Iterator for loop on clusters
639	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
640	archinfo_device_t* device; // Iterator for loop on devices
641	uint32_t cp0_nb = 0; // CP0s counter
642
643	header = (archinfo_header_t*)ARCHINFO_BASE;
644	cluster_base = archinfo_get_cluster_base(header);
645	device_base = archinfo_get_device_base (header);
646
647	// loop on all clusters
648	for (cluster = cluster_base;
649	cluster < &cluster_base[header->x_size * header->y_size];
650	cluster++)
651	{
652	// Skip boot cluster.
653	if (cluster->cxy == BOOT_CORE_CXY)
654	continue;
655
656	// Skip clusters without core (thus without CP0).
657	if (cluster->cores == 0)
658	continue;
659
660	// Skip clusters without device (thus without XICU).
661	if (cluster->devices == 0)
662	continue;
663
664	// search XICU device associated to CP0, and send a WTI to activate it
665	for (device = &device_base[cluster->device_offset];
666	device < &device_base[cluster->device_offset + cluster->devices];
667	device++)
668	{
669	if (device->type == DEV_TYPE_ICU_XCU)
670	{
671
672	#if DEBUG_BOOT_WAKUP
673	boot_printf("\n[BOOT] core[%x][0] activated at cycle %d\n",
674	cluster->cxy , boot_get_proctime );
675	#endif
676
677	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
678	cp0_nb++;
679	}
680	}
681	}
682	return cp0_nb;
683
684	} // boot_wake_cp0()
685
686	/*********************************************************************************
687	* This function is called by all CP0 to activate all local CPi cores.
688	* @ boot_info : pointer to local 'boot_info_t' structure, used to find
689	* the XICU device associated with local CPi base addresses.
690	*********************************************************************************/
691	static void boot_wake_local_cores(boot_info_t * boot_info)
692	{
693	boot_device_t * device; // Iterator on devices
694	unsigned int core_id; // Iterator on cores
695
696	// loop on devices to find XCU
697	for (device = &boot_info->int_dev[0];
698	device < &boot_info->int_dev[boot_info->int_dev_nr];
699	device++)
700	{
701	if (device->type == DEV_TYPE_ICU_XCU)
702	{
703	// loop on cores
704	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
705	{
706
707	#if DEBUG_BOOT_WAKUP
708	boot_printf("\n[BOOT] core[%x][%d] activated at cycle %d\n",
709	boot_info->cxy , core_id , boot_get_proctime() );
710	#endif
711	boot_remote_sw((xptr_t) (device->base + (core_id << 2)),
712	(uint32_t)boot_entry);
713	}
714	}
715	}
716	} // boot_wake_local_cores()
717
718
719	/*********************************************************************************
720	* This main function of the boot-loader is called by the boot_entry()
721	* function, and executed by all cores.
722	* The arguments values are computed by the boot_entry code.
723	* @ lid : core local identifier,
724	* @ cxy : cluster identifier,
725	*********************************************************************************/
726	void boot_loader( lid_t lid,
727	cxy_t cxy )
728	{
729	boot_info_t * boot_info; // pointer on local boot_info_t structure
730
731	if (lid == 0)
732	{
733	/****************************************************
734	* PHASE A : only CP0 in boot cluster executes it
735	***************************************************/
736	if (cxy == BOOT_CORE_CXY)
737	{
738	boot_printf("\n[BOOT] core[%x][%d] enters at cycle %d\n",
739	cxy , lid , boot_get_proctime() );
740
741	// Initialize IOC driver
742	if (USE_IOC_BDV) boot_bdv_init();
743	else if (USE_IOC_HBA) boot_hba_init();
744	// else if (USE_IOC_SDC) boot_sdc_init();
745	// else if (USE_IOC_SPI) boot_spi_init();
746	else if (!USE_IOC_RDK)
747	{
748	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
749	boot_exit();
750	}
751
752	// Initialize FAT32.
753	boot_fat32_init();
754
755	// Load the 'kernel.elf' file into memory from IOC, and set
756	// the global variables defining the kernel layout
757	boot_kernel_load();
758
759	boot_printf("\n[BOOT] core[%x][%d] loaded kernel at cycle %d\n",
760	cxy , lid , boot_get_proctime() );
761
762	// Load the arch_info.bin file into memory.
763	boot_archinfo_load();
764
765	// Get local boot_info_t structure base address.
766	// It is the first structure in the .kdata segment.
767	boot_info = (boot_info_t *)seg_kdata_base;
768
769	// Initialize local boot_info_t structure.
770	boot_info_init( boot_info , cxy );
771
772	// check boot_info signature
773	if (boot_info->signature != BOOT_INFO_SIGNATURE)
774	{
775	boot_printf("\n[BOOT ERROR] in %s reported by core[%x][%d]\n"
776	" illegal boot_info signature / should be %x\n",
777	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
778	boot_exit();
779	}
780
781	boot_printf("\n[BOOT] core[%x][%d] loaded boot_info at cycle %d\n",
782	cxy , lid , boot_get_proctime() );
783
784	// Check core information.
785	boot_check_core(boot_info, lid);
786
787	// Activate other CP0s / get number of active CP0s
788	active_cp0s_nr = boot_wake_all_cp0s() + 1;
789
790	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
791	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
792	active_cp0s_nr );
793
794	// activate other local cores
795	boot_wake_local_cores( boot_info );
796
797	// Wait until all local cores in cluster ready
798	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
799	boot_info->cores_nr );
800	}
801	/******************************************************************
802	* PHASE B : all CP0s other than CP0 in boot cluster execute it
803	*****************************************************************/
804	else
805	{
806	// at this point, all INSTRUCTION address extension registers
807	// point on cluster(0,0), but the DATA extension registers point
808	// already on the local cluster to use the local stack.
809	// To access the bootloader global variables we must first copy
810	// the boot code (data and instructions) in the local cluster.
811	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
812	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
813	BOOT_MAX_SIZE );
814
815	// from now, it is safe to refer to the boot code global variables
816	boot_printf("\n[BOOT] core[%x][%d] replicated boot code at cycle %d\n",
817	cxy , lid , boot_get_proctime() );
818
819	// switch to the INSTRUCTION local memory space, to avoid contention.
820	asm volatile("mtc2 %0, $25" :: "r"(cxy));
821
822	// Copy the arch_info.bin file into the local memory.
823	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
824	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
825	ARCHINFO_MAX_SIZE );
826
827	boot_printf("\n[BOOT] core[%x][%d] replicated arch_info at cycle %d\n",
828	cxy , lid , boot_get_proctime() );
829
830	// Copy the kcode segment into local memory
831	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
832	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
833	seg_kcode_size );
834
835	// Copy the kdata segment into local memory
836	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
837	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
838	seg_kdata_size );
839
840	boot_printf("\n[BOOT] core[%x][%d] replicated kernel code at cycle %d\n",
841	cxy , lid , boot_get_proctime() );
842
843	// Get local boot_info_t structure base address.
844	boot_info = (boot_info_t*)seg_kdata_base;
845
846	// Initialize local boot_info_t structure.
847	boot_info_init( boot_info , cxy );
848
849	// Check core information.
850	boot_check_core( boot_info , lid );
851
852	// get number of active clusters from BOOT_CORE cluster
853	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
854
855	// Wait until all clusters (i.e all CP0s) ready to enter kernel
856	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
857
858	// activate other local cores
859	boot_wake_local_cores( boot_info );
860
861	// Wait until all local cores in cluster ready
862	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
863	boot_info->cores_nr );
864	}
865	}
866	else
867	{
868	/***************************************************************
869	* PHASE C: all non CP0 cores in all clusters execute it
870	**************************************************************/
871
872	// Switch to the INSTRUCTIONS local memory space
873	// to avoid contention at the boot cluster.
874	asm volatile("mtc2 %0, $25" :: "r"(cxy));
875
876	// Get local boot_info_t structure base address.
877	boot_info = (boot_info_t *)seg_kdata_base;
878
879	// Check core information
880	boot_check_core(boot_info, lid);
881
882	// Wait until all local cores in cluster ready
883	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
884	}
885
886	// Each core compute address of a temporary kernel stack
887	// in the upper part of the local cluster memory...
888	uint32_t stack_ptr = ((boot_info->pages_nr - lid) << 12) - 16;
889
890	// All cores initialise stack pointer,
891	// reset the BEV bit in status register,
892	// register "boot_info" argument in a0,
893	// and jump to kernel_entry.
894	asm volatile( "mfc0 $27, $12 \n"
895	"lui $26, 0xFFBF \n"
896	"ori $26, $26, 0xFFFF \n"
897	"and $27, $27, $26 \n"
898	"mtc0 $27, $12 \n"
899	"move $4, %0 \n"
900	"move $29, %1 \n"
901	"jr %2 \n"
902	:: "r"(boot_info) , "r"(stack_ptr) , "r"(kernel_entry) );
903
904	} // boot_loader()

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