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source: trunk/tools/bootloader_tsar/boot.c @ 195

Last change on this file since 195 was 188, checked in by alain, 7 years ago
Redefine the PIC device API.
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 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 and is loaded into memory by core[0,0] (cxy = 0 / lid = 0), *
33	* and is copied in each other cluter by the local CP0 (lid = 0]. *
34	* *
35	* 1) The boot-loader first phase is executed by core[0,0], 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 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 core[0,0]). 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), *
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	uint32_t end;
349	uint32_t rsvd_pages;
350	boot_device_t * boot_dev;
351
352	// get pointer on ARCHINFO header and on the four arch_info arrays
353	header = (archinfo_header_t*)ARCHINFO_BASE;
354	core_base = archinfo_get_core_base (header);
355	cluster_base = archinfo_get_cluster_base(header);
356	device_base = archinfo_get_device_base (header);
357	irq_base = archinfo_get_irq_base (header);
358
359	// Initialize global platform parameters
360	boot_info->x_size = header->x_size;
361	boot_info->y_size = header->y_size;
362	boot_info->x_width = header->x_width;
363	boot_info->y_width = header->y_width;
364	boot_info->paddr_width = header->paddr_width;
365	boot_info->io_cxy = header->io_cxy;
366
367	// Initialize kernel segments from global variables
368	boot_info->kernel_code_start = seg_kcode_base;
369	boot_info->kernel_code_end = seg_kcode_base + seg_kcode_size;
370	boot_info->kernel_data_start = seg_kdata_base;
371	boot_info->kernel_data_end = seg_kdata_base + seg_kdata_size;
372
373	// loop on arch_info clusters to get relevant pointers
374	for (cluster = cluster_base;
375	cluster < &cluster_base[header->x_size * header->y_size];
376	cluster++)
377	{
378	if( cluster->cxy == cxy ) my_cluster = cluster;
379	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
380	}
381
382	if( my_cluster == NULL )
383	{
384	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
385	__FUNCTION__ , cxy );
386	boot_exit();
387	}
388
389	if( io_cluster == NULL )
390	{
391	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
392	__FUNCTION__ , header->io_cxy );
393	boot_exit();
394	}
395
396	///////////////////////////////////////////////////
397	// loop on arch-info peripherals in io_cluster,
398	// to initialize the boot_info array of external peripherals
399
400	#if DEBUG_BOOT_INFO
401	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
402	__FUNCTION__ , boot_get_proctime() );
403	#endif
404
405	device_id = 0;
406	for (device = &device_base[io_cluster->device_offset];
407	device < &device_base[io_cluster->device_offset + io_cluster->devices];
408	device++ )
409	{
410	if( device_id >= CONFIG_MAX_EXT_DEV )
411	{
412	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
413	__FUNCTION__ );
414	boot_exit();
415	}
416
417	// keep only external devices
418	if( (device->type != DEV_TYPE_RAM_SCL) &&
419	(device->type != DEV_TYPE_ICU_XCU) &&
420	(device->type != DEV_TYPE_MMC_TSR) &&
421	(device->type != DEV_TYPE_DMA_SCL) )
422	{
423	boot_dev = &boot_info->ext_dev[device_id];
424
425	boot_dev->type = device->type;
426	boot_dev->base = device->base;
427	boot_dev->channels = device->channels;
428	boot_dev->param0 = device->arg0;
429	boot_dev->param1 = device->arg1;
430	boot_dev->param2 = device->arg2;
431	boot_dev->param3 = device->arg3;
432	boot_dev->irqs = device->irqs;
433
434	device_id++;
435
436	#if DEBUG_BOOT_INFO
437	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
438	device_type_str( device->type ) , device->base , device->size ,
439	device->channels , device->irqs );
440	#endif
441	}
442
443	// handle IRQs for PIC
444	if (device->type == DEV_TYPE_PIC_TSR)
445	{
446	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
447	{
448	boot_dev->irq[irq_id].valid = 0;
449	}
450
451	for (irq = &irq_base[device->irq_offset];
452	irq < &irq_base[device->irq_offset + device->irqs];
453	irq++)
454	{
455	boot_dev->irq[irq->port].valid = 1;
456	boot_dev->irq[irq->port].dev_type = irq->dev_type;
457	boot_dev->irq[irq->port].channel = irq->channel;
458	boot_dev->irq[irq->port].is_rx = irq->is_rx;
459
460	#if DEBUG_BOOT_INFO
461	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
462	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
463	#endif
464	}
465	}
466	} // end loop on io_cluster peripherals
467
468	// initialize number of external peripherals
469	boot_info->ext_dev_nr = device_id;
470
471	// Initialize cluster specific resources
472	boot_info->cxy = my_cluster->cxy;
473
474	#if DEBUG_BOOT_INFO
475	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
476	#endif
477
478	////////////////////////////////////////
479	// Initialize array of core descriptors
480	core_id = 0;
481	for (core = &core_base[my_cluster->core_offset];
482	core < &core_base[my_cluster->core_offset + my_cluster->cores];
483	core++ )
484	{
485	boot_info->core[core_id].gid = (gid_t)core->gid;
486	boot_info->core[core_id].lid = (lid_t)core->lid;
487	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
488
489	#if DEBUG_BOOT_INFO
490	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
491	core->gid , core->cxy , core->lid );
492	#endif
493	core_id++;
494	}
495
496	// Initialize number of cores in my_cluster
497	boot_info->cores_nr = core_id;
498
499	//////////////////////////////////////////////////////////////////////
500	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
501
502	#if DEBUG_BOOT_INFO
503	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
504	#endif
505
506	device_id = 0;
507	for (device = &device_base[my_cluster->device_offset];
508	device < &device_base[my_cluster->device_offset + my_cluster->devices];
509	device++ )
510	{
511	// keep only internal devices
512	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
513	(device->type == DEV_TYPE_ICU_XCU) \|\|
514	(device->type == DEV_TYPE_MMC_TSR) \|\|
515	(device->type == DEV_TYPE_DMA_SCL) )
516	{
517	if (device->type == DEV_TYPE_RAM_SCL) // RAM
518	{
519	// set number of physical memory pages
520	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
521
522	#if DEBUG_BOOT_INFO
523	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
524	#endif
525	}
526	else // ICU / MMC / DMA
527	{
528	if( device_id >= CONFIG_MAX_INT_DEV )
529	{
530	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
531	__FUNCTION__ , cxy );
532	boot_exit();
533	}
534
535	boot_dev = &boot_info->int_dev[device_id];
536
537	boot_dev->type = device->type;
538	boot_dev->base = device->base;
539	boot_dev->channels = device->channels;
540	boot_dev->param0 = device->arg0;
541	boot_dev->param1 = device->arg1;
542	boot_dev->param2 = device->arg2;
543	boot_dev->param3 = device->arg3;
544	boot_dev->irqs = device->irqs;
545
546	device_id++;
547
548	#if DEBUG_BOOT_INFO
549	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
550	device_type_str( device->type ) , device->base , device->size ,
551	device->channels , device->irqs );
552	#endif
553
554	// handle IRQs for ICU
555	if (device->type == DEV_TYPE_ICU_XCU)
556	{
557	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
558	{
559	boot_dev->irq[irq_id].valid = 0;
560	}
561
562	for (irq = &irq_base[device->irq_offset];
563	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
564	{
565	boot_dev->irq[irq->port].valid = 1;
566	boot_dev->irq[irq->port].dev_type = irq->dev_type;
567	boot_dev->irq[irq->port].channel = irq->channel;
568	boot_dev->irq[irq->port].is_rx = irq->is_rx;
569
570	#if DEBUG_BOOT_INFO
571	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
572	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
573	#endif
574
575	}
576	}
577	}
578	}
579	} // end loop on local peripherals
580
581	// initialize number of external peripherals
582	boot_info->int_dev_nr = device_id;
583
584	// Get the top address of the kernel segments
585	end = (boot_info->kernel_code_end > boot_info->kernel_data_end ) ?
586	boot_info->kernel_code_end : boot_info->kernel_data_end;
587
588	// Set number of pages occupied by the kernel code
589	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
590	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
591
592	// No "reserved zones" for the TSAR architecture
593	boot_info->rsvd_nr = 0;
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 the other CPi cores.
688	* @ boot_info : pointer to local 'boot_info_t' structure.
689	*********************************************************************************/
690	static void boot_wake_local_cores(boot_info_t * boot_info)
691	{
692	unsigned int core_id;
693
694	// get pointer on XCU device descriptor in boot_info
695	boot_device_t * xcu = &boot_info->int_dev[0];
696
697	// loop on cores
698	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
699	{
700
701	#if DEBUG_BOOT_WAKUP
702	boot_printf("\n[BOOT] core[%x][%d] activated at cycle %d\n",
703	boot_info->cxy , core_id , boot_get_proctime() );
704	#endif
705	// send an IPI
706	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
707	}
708	} // boot_wake_local_cores()
709
710
711	/*********************************************************************************
712	* This main function of the boot-loader is called by the boot_entry()
713	* function, and executed by all cores.
714	* The arguments values are computed by the boot_entry code.
715	* @ lid : core local identifier,
716	* @ cxy : cluster identifier,
717	*********************************************************************************/
718	void boot_loader( lid_t lid,
719	cxy_t cxy )
720	{
721	boot_info_t * boot_info; // pointer on local boot_info_t structure
722
723	if (lid == 0)
724	{
725	/****************************************************
726	* PHASE A : only CP0 in boot cluster executes it
727	***************************************************/
728	if (cxy == BOOT_CORE_CXY)
729	{
730	boot_printf("\n[BOOT] core[%x][%d] enters at cycle %d\n",
731	cxy , lid , boot_get_proctime() );
732
733	// Initialize IOC driver
734	if (USE_IOC_BDV) boot_bdv_init();
735	else if (USE_IOC_HBA) boot_hba_init();
736	// else if (USE_IOC_SDC) boot_sdc_init();
737	// else if (USE_IOC_SPI) boot_spi_init();
738	else if (!USE_IOC_RDK)
739	{
740	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
741	boot_exit();
742	}
743
744	// Initialize FAT32.
745	boot_fat32_init();
746
747	// Load the 'kernel.elf' file into memory from IOC, and set
748	// the global variables defining the kernel layout
749	boot_kernel_load();
750
751	boot_printf("\n[BOOT] core[%x][%d] loaded kernel at cycle %d\n",
752	cxy , lid , boot_get_proctime() );
753
754	// Load the arch_info.bin file into memory.
755	boot_archinfo_load();
756
757	// Get local boot_info_t structure base address.
758	// It is the first structure in the .kdata segment.
759	boot_info = (boot_info_t *)seg_kdata_base;
760
761	// Initialize local boot_info_t structure.
762	boot_info_init( boot_info , cxy );
763
764	// check boot_info signature
765	if (boot_info->signature != BOOT_INFO_SIGNATURE)
766	{
767	boot_printf("\n[BOOT ERROR] in %s reported by core[%x][%d]\n"
768	" illegal boot_info signature / should be %x\n",
769	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
770	boot_exit();
771	}
772
773	boot_printf("\n[BOOT] core[%x][%d] loaded boot_info at cycle %d\n",
774	cxy , lid , boot_get_proctime() );
775
776	// Check core information.
777	boot_check_core(boot_info, lid);
778
779	// Activate other CP0s / get number of active CP0s
780	active_cp0s_nr = boot_wake_all_cp0s() + 1;
781
782	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
783	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
784	active_cp0s_nr );
785
786	// activate other local cores
787	boot_wake_local_cores( boot_info );
788
789	// Wait until all local cores in cluster ready
790	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
791	boot_info->cores_nr );
792	}
793	/******************************************************************
794	* PHASE B : all CP0s other than CP0 in boot cluster execute it
795	*****************************************************************/
796	else
797	{
798	// at this point, all INSTRUCTION address extension registers
799	// point on cluster(0,0), but the DATA extension registers point
800	// already on the local cluster to use the local stack.
801	// To access the bootloader global variables we must first copy
802	// the boot code (data and instructions) in the local cluster.
803	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
804	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
805	BOOT_MAX_SIZE );
806
807	// from now, it is safe to refer to the boot code global variables
808	boot_printf("\n[BOOT] core[%x][%d] replicated boot code at cycle %d\n",
809	cxy , lid , boot_get_proctime() );
810
811	// switch to the INSTRUCTION local memory space, to avoid contention.
812	asm volatile("mtc2 %0, $25" :: "r"(cxy));
813
814	// Copy the arch_info.bin file into the local memory.
815	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
816	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
817	ARCHINFO_MAX_SIZE );
818
819	boot_printf("\n[BOOT] core[%x][%d] replicated arch_info at cycle %d\n",
820	cxy , lid , boot_get_proctime() );
821
822	// Copy the kcode segment into local memory
823	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
824	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
825	seg_kcode_size );
826
827	// Copy the kdata segment into local memory
828	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
829	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
830	seg_kdata_size );
831
832	boot_printf("\n[BOOT] core[%x][%d] replicated kernel code at cycle %d\n",
833	cxy , lid , boot_get_proctime() );
834
835	// Get local boot_info_t structure base address.
836	boot_info = (boot_info_t*)seg_kdata_base;
837
838	// Initialize local boot_info_t structure.
839	boot_info_init( boot_info , cxy );
840
841	// Check core information.
842	boot_check_core( boot_info , lid );
843
844	// get number of active clusters from BOOT_CORE cluster
845	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
846
847	// Wait until all clusters (i.e all CP0s) ready to enter kernel
848	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
849
850	// activate other local cores
851	boot_wake_local_cores( boot_info );
852
853	// Wait until all local cores in cluster ready
854	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
855	boot_info->cores_nr );
856	}
857	}
858	else
859	{
860	/***************************************************************
861	* PHASE C: all non CP0 cores in all clusters execute it
862	**************************************************************/
863
864	// Switch to the INSTRUCTIONS local memory space
865	// to avoid contention at the boot cluster.
866	asm volatile("mtc2 %0, $25" :: "r"(cxy));
867
868	// Get local boot_info_t structure base address.
869	boot_info = (boot_info_t *)seg_kdata_base;
870
871	// Check core information
872	boot_check_core(boot_info, lid);
873
874	// Wait until all local cores in cluster ready
875	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
876	}
877
878	// Ech core compute stack pointer to the kernel idle-thread descriptor.
879	// The array of idle-thread descriptors is allocated in the kdata segment,
880	// just after the boot_info structure
881
882	uint32_t sp;
883	uint32_t base;
884	uint32_t offset = sizeof( boot_info_t );
885	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
886	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
887
888	// compute base address of idle thread descriptors array
889	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
890	else base = seg_kdata_base + offset;
891
892	// compute stack pointer
893	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
894
895	// Each cores initialise stack pointer,
896	// reset the BEV bit in status register,
897	// register "boot_info" argument in a0,
898	// and jump to kernel_entry.
899	asm volatile( "mfc0 $27, $12 \n"
900	"lui $26, 0xFFBF \n"
901	"ori $26, $26, 0xFFFF \n"
902	"and $27, $27, $26 \n"
903	"mtc0 $27, $12 \n"
904	"move $4, %0 \n"
905	"move $29, %1 \n"
906	"jr %2 \n"
907	:: "r"(boot_info) , "r"(sp) , "r"(kernel_entry) );
908
909	} // boot_loader()

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