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source: trunk/tools/bootloader_tsar/boot.c @ 26

Last change on this file since 26 was 13, checked in by alain, 8 years ago
Few changes in the boot_info structure.
File size: 36.8 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 <kernel_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	// get pointer on ARCHINFO header and on the four arch_info arrays
352	header = (archinfo_header_t*)ARCHINFO_BASE;
353	core_base = archinfo_get_core_base (header);
354	cluster_base = archinfo_get_cluster_base(header);
355	device_base = archinfo_get_device_base (header);
356	irq_base = archinfo_get_irq_base (header);
357
358	// Initialize global platform parameters
359	boot_info->x_size = header->x_size;
360	boot_info->y_size = header->y_size;
361	boot_info->x_width = header->x_width;
362	boot_info->y_width = header->y_width;
363	boot_info->paddr_width = header->paddr_width;
364	boot_info->io_cxy = header->io_cxy;
365
366	// Initialize kernel segments
367	boot_info->kernel_code_start = seg_kcode_base;
368	boot_info->kernel_code_end = seg_kcode_base + seg_kcode_size;
369	boot_info->kernel_data_start = seg_kdata_base;
370	boot_info->kernel_data_end = seg_kdata_base + seg_kdata_size;
371
372	// loop on arch_info clusters to get relevant pointers
373	for (cluster = cluster_base;
374	cluster < &cluster_base[header->x_size * header->y_size];
375	cluster++)
376	{
377	if( cluster->cxy == cxy ) my_cluster = cluster;
378	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
379	}
380
381	if( my_cluster == NULL )
382	{
383	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
384	__FUNCTION__ , cxy );
385	boot_exit();
386	}
387
388	if( io_cluster == NULL )
389	{
390	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
391	__FUNCTION__ , header->io_cxy );
392	boot_exit();
393	}
394
395	// loop on arch-info peripherals in io_cluster,
396	// to initialize the boot_info array of external peripherals
397
398	#if DEBUG_BOOT_INFO
399	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
400	__FUNCTION__ , cxy , boot_get_proctime() );
401	#endif
402
403	device_id = 0;
404	for (device = &device_base[io_cluster->device_offset];
405	device < &device_base[io_cluster->device_offset + io_cluster->devices];
406	device++ )
407	{
408	// initialise one entry for each external peripheral
409	if( (device->type != DEV_TYPE_RAM_SCL) &&
410	(device->type != DEV_TYPE_ICU_XCU) &&
411	(device->type != DEV_TYPE_MMC_TSR) &&
412	(device->type != DEV_TYPE_DMA_SCL) )
413	{
414	boot_dev = &boot_info->ext_dev[device_id];
415
416	boot_dev->type = device->type;
417	boot_dev->base = device->base;
418	boot_dev->channels = device->channels;
419	boot_dev->param0 = device->arg0;
420	boot_dev->param1 = device->arg1;
421	boot_dev->param2 = device->arg2;
422	boot_dev->param3 = device->arg3;
423	boot_dev->irqs = device->irqs;
424
425	device_id++;
426
427	#if DEBUG_BOOT_INFO
428	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
429	device_type_str( device->type ) , device->base , device->size ,
430	device->channels , device->irqs );
431	#endif
432	}
433
434	// Initialize array of irq descriptors for PIC
435	if (device->type == DEV_TYPE_PIC_TSR)
436	{
437	for (irq_id = 0; irq_id < CONFIG_MAX_IRQS_PER_PIC; irq_id++)
438	{
439	boot_dev->irq[irq_id].valid = 0;
440	}
441
442	for (irq = &irq_base[device->irq_offset];
443	irq < &irq_base[device->irq_offset + device->irqs];
444	irq++)
445	{
446	boot_dev->irq[irq->port].valid = 1;
447	boot_dev->irq[irq->port].dev_type = irq->dev_type;
448	boot_dev->irq[irq->port].channel = irq->channel;
449	boot_dev->irq[irq->port].is_rx = irq->is_rx;
450
451	#if DEBUG_BOOT_INFO
452	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
453	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
454	#endif
455	}
456	}
457	} // end loop on io_cluster peripherals
458
459	// initialize number of external peripherals
460	boot_info->ext_dev_nr = device_id;
461
462	// Initialize cluster specific resources
463	boot_info->cxy = my_cluster->cxy;
464
465	#if DEBUG_BOOT_INFO
466	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ );
467	#endif
468
469	// Initialize array of core descriptors
470	core_id = 0;
471	for (core = &core_base[my_cluster->core_offset];
472	core < &core_base[my_cluster->core_offset + my_cluster->cores];
473	core++ )
474	{
475	boot_info->core[core_id].gid = (gid_t)core->gid;
476	boot_info->core[core_id].lid = (lid_t)core->lid;
477	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
478
479	#if DEBUG_BOOT_INFO
480	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
481	core->gid , core->cxy , core->lid );
482	#endif
483	core_id++;
484	}
485
486	// Initialize number of cores in my_cluster
487	boot_info->cores_nr = core_id;
488
489	// initialise internal devices (RAM, XCU, MMC, DMA)
490	// set default values, then scan all local devices
491
492	#if DEBUG_BOOT_INFO
493	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ );
494	#endif
495
496	boot_info->pages_nr = 0;
497	boot_info->dev_icu.channels = 0;
498	boot_info->dev_mmc.channels = 0;
499	boot_info->dev_dma.channels = 0;
500
501	for (device = &device_base[my_cluster->device_offset];
502	device < &device_base[my_cluster->device_offset + my_cluster->devices];
503	device++ )
504	{
505	if (device->type == DEV_TYPE_RAM_SCL)
506	{
507	// set total number of physical memory pages in cluster
508	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
509
510	// Get the last address allocated for the kernel segments
511	uint32_t end;
512	if( boot_info->kernel_code_end > boot_info->kernel_data_end )
513	{
514	end = boot_info->kernel_code_end;
515	}
516	else
517	{
518	end = boot_info->kernel_data_end;
519	}
520
521	// Compute the number of pages allocated for the kernel.
522	if( (end & CONFIG_PPM_PAGE_MASK) == 0 )
523	{
524	boot_info->pages_offset = end >> CONFIG_PPM_PAGE_SHIFT;
525	}
526	else
527	{
528	boot_info->pages_offset = (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
529	}
530
531	#if DEBUG_BOOT_INFO
532	boot_printf(" - RAM : %x pages / first free page = %x\n",
533	boot_info->pages_nr , boot_info->pages_offset );
534	#endif
535	}
536	else if (device->type == DEV_TYPE_ICU_XCU)
537	{
538	boot_dev = &boot_info->dev_icu;
539
540	boot_dev->type = device->type;
541	boot_dev->base = device->base;
542	boot_dev->channels = device->channels;
543	boot_dev->param0 = device->arg0;
544	boot_dev->param1 = device->arg1;
545	boot_dev->param2 = device->arg2;
546	boot_dev->param3 = device->arg3;
547	boot_dev->irqs = device->irqs;
548
549	#if DEBUG_BOOT_INFO
550	boot_printf(" - XCU : base = %l / size = %l / channels = %d / irqs = %d\n",
551	device->base , device->size , device->channels , device->irqs );
552	#endif
553
554	for (irq_id = 0; irq_id < CONFIG_MAX_HWIS_PER_ICU; irq_id++)
555	{
556	boot_dev->irq[irq_id].valid = 0;
557	}
558
559	for (irq = &irq_base[device->irq_offset];
560	irq < &irq_base[device->irq_offset + device->irqs];
561	irq++)
562	{
563	boot_dev->irq[irq->port].valid = 1;
564	boot_dev->irq[irq->port].dev_type = irq->dev_type;
565	boot_dev->irq[irq->port].channel = irq->channel;
566	boot_dev->irq[irq->port].is_rx = irq->is_rx;
567
568	#if DEBUG_BOOT_INFO
569	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
570	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
571	#endif
572
573	}
574	}
575	else if( device->type == DEV_TYPE_MMC_TSR )
576	{
577	boot_dev = &boot_info->dev_mmc;
578
579	boot_dev->type = device->type;
580	boot_dev->base = device->base;
581	boot_dev->channels = device->channels;
582	boot_dev->irqs = 0;
583
584	#if DEBUG_BOOT_INFO
585	boot_printf(" - MMC : base = %l / size = %l / channels = %d / irqs = %d\n",
586	device->base , device->size , device->channels , device->irqs );
587	#endif
588	}
589	else if( device->type == DEV_TYPE_DMA_SCL )
590	{
591	boot_dev = &boot_info->dev_dma;
592
593	boot_dev->type = device->type;
594	boot_dev->base = device->base;
595	boot_dev->channels = device->channels;
596	boot_dev->irqs = 0;
597
598	#if DEBUG_BOOT_INFO
599	boot_printf(" - DMA : base = %l / size = %l / channels = %d / irqs = %d\n",
600	device->base , device->size , device->channels , device->irqs );
601	#endif
602	}
603	} // end loop on local peripherals
604
605	// set boot_info signature
606	boot_info->signature = BOOT_INFO_SIGNATURE;
607
608	} // boot_info_init()
609
610	/***********************************************************************************
611	* This function check the local boot_info_t structure for a given core.
612	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
613	* @ lid : core local identifier, index the core descriptor table.
614	**********************************************************************************/
615	static void boot_check_core( boot_info_t * boot_info,
616	lid_t lid)
617	{
618	gid_t gid; // global hardware identifier of this core
619	boot_core_t * this; // BOOT_INFO core descriptor of this core.
620
621	// Get core hardware identifier
622	gid = (gid_t)boot_get_procid();
623
624	// get pointer on core descriptor
625	this = &boot_info->core[lid];
626
627	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
628	{
629	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
630	" - boot_info cxy = %x\n"
631	" - boot_info lid = %d\n"
632	" - boot_info gid = %x\n"
633	" - actual gid = %x\n",
634	this->cxy , this->lid , this->gid , gid );
635	boot_exit();
636	}
637
638	} // boot_check_core()
639
640	/*********************************************************************************
641	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
642	* It returns the number of CP0s actually activated.
643	********************************************************************************/
644	static uint32_t boot_wake_all_cp0s()
645	{
646	archinfo_header_t* header; // Pointer on ARCHINFO header
647	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
648	archinfo_cluster_t* cluster; // Iterator for loop on clusters
649	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
650	archinfo_device_t* device; // Iterator for loop on devices
651	uint32_t cp0_nb = 0; // CP0s counter
652
653	header = (archinfo_header_t*)ARCHINFO_BASE;
654	cluster_base = archinfo_get_cluster_base(header);
655	device_base = archinfo_get_device_base (header);
656
657	// loop on all clusters
658	for (cluster = cluster_base;
659	cluster < &cluster_base[header->x_size * header->y_size];
660	cluster++)
661	{
662	// Skip boot cluster.
663	if (cluster->cxy == BOOT_CORE_CXY)
664	continue;
665
666	// Skip clusters without core (thus without CP0).
667	if (cluster->cores == 0)
668	continue;
669
670	// Skip clusters without device (thus without XICU).
671	if (cluster->devices == 0)
672	continue;
673
674	// search XICU device associated to CP0, and send a WTI to activate it
675	for (device = &device_base[cluster->device_offset];
676	device < &device_base[cluster->device_offset + cluster->devices];
677	device++)
678	{
679	if (device->type == DEV_TYPE_ICU_XCU)
680	{
681
682	#if DEBUG_BOOT_WAKUP
683	boot_printf("\n[BOOT] core[%x][0] activated at cycle %d\n",
684	cluster->cxy , boot_get_proctime );
685	#endif
686
687	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
688	cp0_nb++;
689	}
690	}
691	}
692	return cp0_nb;
693
694	} // boot_wake_cp0()
695
696	/*********************************************************************************
697	* This function is called by all CP0 to activate all local CPi cores.
698	* @ boot_info : pointer to local 'boot_info_t' structure, used to find
699	* the XICU device associated with local CPi base addresses.
700	*********************************************************************************/
701	static void boot_wake_local_cores(boot_info_t * boot_info)
702	{
703	boot_device_t * device; // Iterator on devices
704	unsigned int core_id; // Iterator on cores
705
706	device = &boot_info->dev_icu;
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	boot_remote_sw( (xptr_t)(device->base + (core_id << 2)) , (uint32_t)boot_entry );
717	}
718	} // boot_wake_local_cores()
719
720
721	/*********************************************************************************
722	* This main function of the boot-loader is called by the boot_entry()
723	* function, and executed by all cores.
724	* The arguments values are computed by the boot_entry code.
725	* @ lid : core local identifier,
726	* @ cxy : cluster identifier,
727	*********************************************************************************/
728	void boot_loader( lid_t lid,
729	cxy_t cxy )
730	{
731	boot_info_t * boot_info; // pointer on local boot_info_t structure
732
733	if (lid == 0)
734	{
735	/****************************************************
736	* PHASE A : only CP0 in boot cluster executes it
737	***************************************************/
738	if (cxy == BOOT_CORE_CXY)
739	{
740	boot_printf("\n[BOOT] core[%x][%d] enters at cycle %d\n",
741	cxy , lid , boot_get_proctime() );
742
743	// Initialize IOC driver
744	if (USE_IOC_BDV) boot_bdv_init();
745	else if (USE_IOC_HBA) boot_hba_init();
746	// else if (USE_IOC_SDC) boot_sdc_init();
747	// else if (USE_IOC_SPI) boot_spi_init();
748	else if (!USE_IOC_RDK)
749	{
750	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
751	boot_exit();
752	}
753
754	// Initialize FAT32.
755	boot_fat32_init();
756
757	// Load the 'kernel.elf' file into memory from IOC, and set
758	// the global variables defining the kernel layout
759	boot_kernel_load();
760
761	boot_printf("\n[BOOT] core[%x][%d] loaded kernel at cycle %d\n",
762	cxy , lid , boot_get_proctime() );
763
764	// Load the arch_info.bin file into memory.
765	boot_archinfo_load();
766
767	// Get local boot_info_t structure base address.
768	// It is the first structure in the .kdata segment.
769	boot_info = (boot_info_t *)seg_kdata_base;
770
771	// Initialize local boot_info_t structure.
772	boot_info_init( boot_info , cxy );
773
774	// check boot_info signature
775	if (boot_info->signature != BOOT_INFO_SIGNATURE)
776	{
777	boot_printf("\n[BOOT ERROR] in %s reported by core[%x][%d]\n"
778	" illegal boot_info signature / should be %x\n",
779	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
780	boot_exit();
781	}
782
783	boot_printf("\n[BOOT] core[%x][%d] loaded boot_info at cycle %d\n",
784	cxy , lid , boot_get_proctime() );
785
786	// Check core information.
787	boot_check_core(boot_info, lid);
788
789	// Activate other CP0s / get number of active CP0s
790	active_cp0s_nr = boot_wake_all_cp0s() + 1;
791
792	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
793	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
794	active_cp0s_nr );
795
796	// activate other local cores
797	boot_wake_local_cores( boot_info );
798
799	// Wait until all local cores in cluster ready
800	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
801	boot_info->cores_nr );
802	}
803	/******************************************************************
804	* PHASE B : all CP0s other than CP0 in boot cluster execute it
805	*****************************************************************/
806	else
807	{
808	// at this point, all INSTRUCTION address extension registers
809	// point on cluster(0,0), but the DATA extension registers point
810	// already on the local cluster to use the local stack.
811	// To access the bootloader global variables we must first copy
812	// the boot code (data and instructions) in the local cluster.
813	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
814	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
815	BOOT_MAX_SIZE );
816
817	// from now, it is safe to refer to the boot code global variables
818	boot_printf("\n[BOOT] core[%x][%d] replicated boot code at cycle %d\n",
819	cxy , lid , boot_get_proctime() );
820
821	// switch to the INSTRUCTION local memory space, to avoid contention.
822	asm volatile("mtc2 %0, $25" :: "r"(cxy));
823
824	// Copy the arch_info.bin file into the local memory.
825	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
826	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
827	ARCHINFO_MAX_SIZE );
828
829	boot_printf("\n[BOOT] core[%x][%d] replicated arch_info at cycle %d\n",
830	cxy , lid , boot_get_proctime() );
831
832	// Copy the kcode segment into local memory
833	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
834	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
835	seg_kcode_size );
836
837	// Copy the kdata segment into local memory
838	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
839	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
840	seg_kdata_size );
841
842	boot_printf("\n[BOOT] core[%x][%d] replicated kernel code at cycle %d\n",
843	cxy , lid , boot_get_proctime() );
844
845	// Get local boot_info_t structure base address.
846	boot_info = (boot_info_t*)seg_kdata_base;
847
848	// Initialize local boot_info_t structure.
849	boot_info_init( boot_info , cxy );
850
851	// Check core information.
852	boot_check_core( boot_info , lid );
853
854	// get number of active clusters from BOOT_CORE cluster
855	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
856
857	// Wait until all clusters (i.e all CP0s) ready to enter kernel
858	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
859
860	// activate other local cores
861	boot_wake_local_cores( boot_info );
862
863	// Wait until all local cores in cluster ready
864	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
865	boot_info->cores_nr );
866	}
867	}
868	else
869	{
870	/***************************************************************
871	* PHASE C: all non CP0 cores in all clusters execute it
872	**************************************************************/
873
874	// Switch to the INSTRUCTIONS local memory space
875	// to avoid contention at the boot cluster.
876	asm volatile("mtc2 %0, $25" :: "r"(cxy));
877
878	// Get local boot_info_t structure base address.
879	boot_info = (boot_info_t *)seg_kdata_base;
880
881	// Check core information
882	boot_check_core(boot_info, lid);
883
884	// Wait until all local cores in cluster ready
885	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
886	}
887
888	// Ech core compute stack pointer to the kernel idle-thread descriptor.
889	// The array of idle-thread descriptors is allocated in the kdata segment,
890	// just after the boot_info structure
891
892	uint32_t sp;
893	uint32_t base;
894	uint32_t offset = sizeof( boot_info_t );
895	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
896	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
897
898	// compute base address of idle thread descriptors array
899	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
900	else base = seg_kdata_base + offset;
901
902	// compute stack pointer
903	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
904
905	// Each cores initialise stack pointer,
906	// reset the BEV bit in status register,
907	// register "boot_info" argument in a0,
908	// and jump to kernel_entry.
909	asm volatile( "mfc0 $27, $12 \n"
910	"lui $26, 0xFFBF \n"
911	"ori $26, $26, 0xFFFF \n"
912	"and $27, $27, $26 \n"
913	"mtc0 $27, $12 \n"
914	"move $4, %0 \n"
915	"move $29, %1 \n"
916	"jr %2 \n"
917	:: "r"(boot_info) , "r"(sp) , "r"(kernel_entry) );
918
919	} // boot_loader()

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