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source: trunk/boot/tsar_mips32/boot.c @ 532

Last change on this file since 532 was 530, checked in by nicolas.van.phan@…, 6 years ago
Hack to compile on both IOB and LETI for now
File size: 39.7 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_kernel_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 seg_kentry_base; // kcode segment base address
112	uint32_t seg_kentry_size; // kcode segment size (bytes)
113
114	uint32_t kernel_entry; // kernel entry point
115
116	// address used by the WTI to activate remote CP0s
117
118	// Functions called by boot_entry.S must be externs.
119	extern void boot_entry( void ); // boot_loader entry point
120	extern void boot_loader( lid_t lid, cxy_t cxy );
121
122	/*********************************************************************************
123	* This function returns the printable string for each device type
124	********************************************************************************/
125	static const char * device_type_str( uint32_t dev_type )
126	{
127	if ( dev_type == DEV_TYPE_RAM_SCL ) return "RAM_SCL";
128	else if( dev_type == DEV_TYPE_ROM_SCL ) return "ROM_SCL";
129	else if( dev_type == DEV_TYPE_FBF_SCL ) return "FBF_SCL";
130	else if( dev_type == DEV_TYPE_IOB_TSR ) return "IOB_TSR";
131	else if( dev_type == DEV_TYPE_IOC_BDV ) return "IOC_BDV";
132	else if( dev_type == DEV_TYPE_IOC_HBA ) return "IOC_HBA";
133	else if( dev_type == DEV_TYPE_IOC_SDC ) return "IOC_SDC";
134	else if( dev_type == DEV_TYPE_IOC_SPI ) return "IOC_SPI";
135	else if( dev_type == DEV_TYPE_IOC_RDK ) return "IOC_RDK";
136	else if( dev_type == DEV_TYPE_MMC_TSR ) return "MMC_TSR";
137	else if( dev_type == DEV_TYPE_DMA_SCL ) return "DMA_SCL";
138	else if( dev_type == DEV_TYPE_NIC_CBF ) return "NIC_CBF";
139	else if( dev_type == DEV_TYPE_TIM_SCL ) return "TIM_SCL";
140	else if( dev_type == DEV_TYPE_TXT_TTY ) return "TXT_TTY";
141	else if( dev_type == DEV_TYPE_ICU_XCU ) return "ICU_XCU";
142	else if( dev_type == DEV_TYPE_PIC_TSR ) return "PIC_TSR";
143	else return "undefined";
144	}
145
146	/************************************************************************************
147	* This function loads the arch_info.bin file into the boot cluster memory.
148	***********************************************************************************/
149	static void boot_archinfo_load( void )
150	{
151	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
152
153	// Load file into memory
154	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
155	{
156	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
157	"<%s> file not found\n",
158	ARCHINFO_PATHNAME);
159	boot_exit();
160	}
161
162	if (header->signature != ARCHINFO_SIGNATURE)
163	{
164	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
165	"<%s> file signature should be %x\n",
166	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
167	boot_exit();
168	}
169
170	#if DEBUG_BOOT_INFO
171	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
172	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
173	#endif
174
175	} // boot_archinfo_load()
176
177	/**************************************************************************************
178	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
179	* analyzes it, and places the three kcode, kentry, kdata segments at their final
180	* physical adresses (defined the .elf file).
181	* It set the global variables defining the kernel layout.
182	*************************************************************************************/
183	static void boot_kernel_load( void )
184	{
185	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
186	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
187	uint32_t phdr_offset; // program header offset in kernel.elf file.
188	uint32_t segments_nb; // number of segments in kernel.elf file.
189	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
190	uint32_t seg_paddr; // segment local physical address of segment
191	uint32_t seg_offset; // segment offset in kernel.elf file
192	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
193	uint32_t seg_memsz; // segment size (bytes) in memory image.
194	bool_t kcode_found; // kcode segment found.
195	bool_t kdata_found; // kdata segment found.
196	bool_t kentry_found; // kentry segment found.
197	uint32_t seg_id; // iterator for segments loop.
198
199	#if DEBUG_BOOT_ELF
200	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
201	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
202	#endif
203
204	// Load kernel.elf file into memory buffer
205	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
206	{
207	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
208	KERNEL_PATHNAME);
209	boot_exit();
210	}
211
212	// get pointer to kernel.elf header
213	elf_header = (Elf32_Ehdr*)KERN_BASE;
214
215	// check signature
216	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
217	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
218	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
219	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
220	{
221	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
222	"<%s> is not an ELF file\n",
223	KERNEL_PATHNAME);
224	boot_exit();
225	}
226
227	// Get program header table offset and number of segments
228	phdr_offset = elf_header->e_phoff;
229	segments_nb = elf_header->e_phnum;
230
231	// Get program header table pointer
232	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
233
234	// loop on segments
235	kcode_found = false;
236	kdata_found = false;
237	kentry_found = false;
238	for (seg_id = 0; seg_id < segments_nb; seg_id++)
239	{
240	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
241	{
242	// Get segment attributes.
243	seg_paddr = program_header[seg_id].p_paddr;
244	seg_offset = program_header[seg_id].p_offset;
245	seg_filesz = program_header[seg_id].p_filesz;
246	seg_memsz = program_header[seg_id].p_memsz;
247
248	// get segment base address in buffer
249	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
250
251	// Load segment to its final physical memory address
252	boot_memcpy( (void*)seg_paddr,
253	(void*)seg_src_addr,
254	seg_filesz );
255
256	#if DEBUG_BOOT_ELF
257	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
258	" base = %x / size = %x\n",
259	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
260	#endif
261
262	// Fill remaining memory with zero if (filesz < memsz).
263	if( seg_memsz < seg_filesz )
264	{
265	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
266	}
267
268	// Note: we suppose that the 'kernel.elf' file contains exactly
269	// three loadable segments ktext, kentry, & kdata:
270	// - the kcode segment is read-only and base == KCODE_BASE
271	// - the kentry segment is read-only and base == KENTRY_BASE
272
273	if( ((program_header[seg_id].p_flags & PF_W) == 0) &&
274	(program_header[seg_id].p_paddr == KCODE_BASE) ) // kcode segment
275	{
276	if( kcode_found )
277	{
278	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
279	" two kcode segments found\n",
280	__FUNCTION__ , KERNEL_PATHNAME );
281	boot_exit();
282	}
283
284	kcode_found = true;
285	seg_kcode_base = seg_paddr;
286	seg_kcode_size = seg_memsz;
287	}
288	else if( program_header[seg_id].p_paddr == KENTRY_BASE ) // kentry segment
289	{
290	if( kentry_found )
291	{
292	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
293	" two kentry segments found\n",
294	__FUNCTION__ , KERNEL_PATHNAME );
295	boot_exit();
296	}
297
298	kentry_found = true;
299	seg_kentry_base = seg_paddr;
300	seg_kentry_size = seg_memsz;
301	}
302	else // kdata segment
303	{
304	if( kdata_found )
305	{
306	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
307	" two loadable kdata segments found\n",
308	__FUNCTION__ , KERNEL_PATHNAME );
309	boot_exit();
310	}
311
312	kdata_found = true;
313	seg_kdata_base = seg_paddr;
314	seg_kdata_size = seg_memsz;
315	}
316	}
317	}
318
319	// check kcode & kdata segments found
320	if( kcode_found == false )
321	{
322	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n",
323	__FUNCTION__ , KERNEL_PATHNAME );
324	boot_exit();
325	}
326	if( kentry_found == false )
327	{
328	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry not found\n",
329	__FUNCTION__ , KERNEL_PATHNAME );
330	boot_exit();
331	}
332	if( kdata_found == false )
333	{
334	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n",
335	__FUNCTION__ , KERNEL_PATHNAME );
336	boot_exit();
337	}
338
339	// check segments sizes
340	if( seg_kentry_size > KENTRY_MAX_SIZE )
341	{
342	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry too large\n",
343	__FUNCTION__ , KERNEL_PATHNAME );
344	boot_exit();
345	}
346
347	if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE )
348	{
349	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n",
350	__FUNCTION__ , KERNEL_PATHNAME );
351	}
352
353	// set entry point
354	kernel_entry = (uint32_t)elf_header->e_entry;
355
356	#if DEBUG_BOOT_ELF
357	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
358	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
359	#endif
360
361	} // boot_kernel_load()
362
363	/*************************************************************************************
364	* This function initializes the boot_info_t structure for a given cluster.
365	* @ boot_info : pointer to local boot_info_t structure
366	* @ cxy : cluster identifier
367	************************************************************************************/
368	static void boot_info_init( boot_info_t * boot_info,
369	cxy_t cxy )
370	{
371	archinfo_header_t * header;
372	archinfo_core_t * core_base;
373	archinfo_cluster_t * cluster_base;
374	archinfo_device_t * device_base;
375	archinfo_irq_t * irq_base;
376
377	archinfo_cluster_t * cluster;
378	archinfo_cluster_t * my_cluster = NULL; // target cluster
379	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
380
381	archinfo_core_t * core;
382	uint32_t core_id;
383	archinfo_device_t * device;
384	uint32_t device_id;
385	archinfo_irq_t * irq;
386	uint32_t irq_id;
387	uint32_t end;
388	boot_device_t * boot_dev;
389
390	// get pointer on ARCHINFO header and on the four arch_info arrays
391	header = (archinfo_header_t*)ARCHINFO_BASE;
392	core_base = archinfo_get_core_base (header);
393	cluster_base = archinfo_get_cluster_base(header);
394	device_base = archinfo_get_device_base (header);
395	irq_base = archinfo_get_irq_base (header);
396
397	// Initialize global platform parameters
398	boot_info->x_size = header->x_size;
399	boot_info->y_size = header->y_size;
400	boot_info->x_width = header->x_width;
401	boot_info->y_width = header->y_width;
402	boot_info->x_max = header->x_size; // [FIXME]
403	boot_info->y_max = header->name[5] == 'l' ? header->y_size - 1 : header->y_size; // [FIXME]
404	boot_info->paddr_width = header->paddr_width;
405	boot_info->io_cxy = header->io_cxy;
406
407	// Initialize kernel segments from global variables
408	boot_info->kcode_base = seg_kcode_base;
409	boot_info->kcode_size = seg_kcode_size;
410	boot_info->kdata_base = seg_kdata_base;
411	boot_info->kdata_size = seg_kdata_size;
412	boot_info->kentry_base = seg_kentry_base;
413	boot_info->kentry_size = seg_kentry_size;
414
415	// loop on arch_info clusters to get relevant pointers
416	for (cluster = cluster_base;
417	cluster < &cluster_base[header->x_size * header->y_size];
418	cluster++)
419	{
420	if( cluster->cxy == cxy ) my_cluster = cluster;
421	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
422	}
423
424	if( my_cluster == NULL )
425	{
426	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
427	__FUNCTION__ , cxy );
428	boot_exit();
429	}
430
431	if( io_cluster == NULL )
432	{
433	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
434	__FUNCTION__ , header->io_cxy );
435	boot_exit();
436	}
437
438	//////////////////////////////////////////////////////////
439	// initialize the boot_info array of external peripherals
440
441	#if DEBUG_BOOT_INFO
442	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
443	__FUNCTION__ , boot_get_proctime() );
444	#endif
445
446	device_id = 0;
447	for (device = &device_base[io_cluster->device_offset];
448	device < &device_base[io_cluster->device_offset + io_cluster->devices];
449	device++ )
450	{
451	if( device_id >= CONFIG_MAX_EXT_DEV )
452	{
453	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
454	__FUNCTION__ );
455	boot_exit();
456	}
457
458	// keep only external devices
459	if( (device->type != DEV_TYPE_RAM_SCL) &&
460	(device->type != DEV_TYPE_ICU_XCU) &&
461	(device->type != DEV_TYPE_MMC_TSR) &&
462	(device->type != DEV_TYPE_DMA_SCL) )
463	{
464	boot_dev = &boot_info->ext_dev[device_id];
465
466	boot_dev->type = device->type;
467	boot_dev->base = device->base;
468	boot_dev->channels = device->channels;
469	boot_dev->param0 = device->arg0;
470	boot_dev->param1 = device->arg1;
471	boot_dev->param2 = device->arg2;
472	boot_dev->param3 = device->arg3;
473	boot_dev->irqs = device->irqs;
474
475	device_id++;
476
477	#if DEBUG_BOOT_INFO
478	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
479	device_type_str( device->type ) , device->base , device->size ,
480	device->channels , device->irqs );
481	#endif
482	}
483
484	// handle IRQs for PIC
485	if (device->type == DEV_TYPE_PIC_TSR)
486	{
487	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
488	{
489	boot_dev->irq[irq_id].valid = 0;
490	}
491
492	for (irq = &irq_base[device->irq_offset];
493	irq < &irq_base[device->irq_offset + device->irqs];
494	irq++)
495	{
496	boot_dev->irq[irq->port].valid = 1;
497	boot_dev->irq[irq->port].dev_type = irq->dev_type;
498	boot_dev->irq[irq->port].channel = irq->channel;
499	boot_dev->irq[irq->port].is_rx = irq->is_rx;
500
501	#if DEBUG_BOOT_INFO
502	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
503	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
504	#endif
505	}
506	}
507	} // end loop on io_cluster peripherals
508
509	// initialize number of external peripherals
510	boot_info->ext_dev_nr = device_id;
511
512	// Initialize cluster specific resources
513	boot_info->cxy = my_cluster->cxy;
514
515	#if DEBUG_BOOT_INFO
516	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
517	#endif
518
519	////////////////////////////////////////
520	// Initialize array of core descriptors
521	core_id = 0;
522	for (core = &core_base[my_cluster->core_offset];
523	core < &core_base[my_cluster->core_offset + my_cluster->cores];
524	core++ )
525	{
526	boot_info->core[core_id].gid = (gid_t)core->gid;
527	boot_info->core[core_id].lid = (lid_t)core->lid;
528	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
529
530	#if DEBUG_BOOT_INFO
531	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
532	core->gid , core->cxy , core->lid );
533	#endif
534	core_id++;
535	}
536
537	// Initialize number of cores in my_cluster
538	boot_info->cores_nr = core_id;
539
540	//////////////////////////////////////////////////////////////////////
541	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
542
543	#if DEBUG_BOOT_INFO
544	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
545	#endif
546
547	device_id = 0;
548	for (device = &device_base[my_cluster->device_offset];
549	device < &device_base[my_cluster->device_offset + my_cluster->devices];
550	device++ )
551	{
552	// keep only internal devices
553	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
554	(device->type == DEV_TYPE_ICU_XCU) \|\|
555	(device->type == DEV_TYPE_MMC_TSR) \|\|
556	(device->type == DEV_TYPE_DMA_SCL) )
557	{
558	if (device->type == DEV_TYPE_RAM_SCL) // RAM
559	{
560	// set number of physical memory pages
561	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
562
563	#if DEBUG_BOOT_INFO
564	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
565	#endif
566	}
567	else // ICU / MMC / DMA
568	{
569	if( device_id >= CONFIG_MAX_INT_DEV )
570	{
571	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
572	__FUNCTION__ , cxy );
573	boot_exit();
574	}
575
576	boot_dev = &boot_info->int_dev[device_id];
577
578	boot_dev->type = device->type;
579	boot_dev->base = device->base;
580	boot_dev->channels = device->channels;
581	boot_dev->param0 = device->arg0;
582	boot_dev->param1 = device->arg1;
583	boot_dev->param2 = device->arg2;
584	boot_dev->param3 = device->arg3;
585	boot_dev->irqs = device->irqs;
586
587	device_id++;
588
589	#if DEBUG_BOOT_INFO
590	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
591	device_type_str( device->type ) , device->base , device->size ,
592	device->channels , device->irqs );
593	#endif
594
595	// handle IRQs for ICU
596	if (device->type == DEV_TYPE_ICU_XCU)
597	{
598	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
599	{
600	boot_dev->irq[irq_id].valid = 0;
601	}
602
603	for (irq = &irq_base[device->irq_offset];
604	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
605	{
606	boot_dev->irq[irq->port].valid = 1;
607	boot_dev->irq[irq->port].dev_type = irq->dev_type;
608	boot_dev->irq[irq->port].channel = irq->channel;
609	boot_dev->irq[irq->port].is_rx = irq->is_rx;
610
611	#if DEBUG_BOOT_INFO
612	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
613	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
614	#endif
615
616	}
617	}
618	}
619	}
620	} // end loop on local peripherals
621
622	// initialize number of internal peripherals
623	boot_info->int_dev_nr = device_id;
624
625	// Get the top address of the kernel segments
626	end = boot_info->kdata_base + boot_info->kdata_size;
627
628	// compute number of physical pages occupied by the kernel code
629	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
630	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
631
632	// no reserved sones for TSAR architecture
633	boot_info->rsvd_nr = 0;
634
635	// set boot_info signature
636	boot_info->signature = BOOT_INFO_SIGNATURE;
637
638	} // boot_info_init()
639
640	/***********************************************************************************
641	* This function check the local boot_info_t structure for a given core.
642	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
643	* @ lid : core local identifier, index the core descriptor table.
644	**********************************************************************************/
645	static void boot_check_core( boot_info_t * boot_info,
646	lid_t lid)
647	{
648	gid_t gid; // global hardware identifier of this core
649	boot_core_t * this; // BOOT_INFO core descriptor of this core.
650
651	// Get core hardware identifier
652	gid = (gid_t)boot_get_procid();
653
654	// get pointer on core descriptor
655	this = &boot_info->core[lid];
656
657	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
658	{
659	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
660	" - boot_info cxy = %x\n"
661	" - boot_info lid = %d\n"
662	" - boot_info gid = %x\n"
663	" - actual gid = %x\n",
664	this->cxy , this->lid , this->gid , gid );
665	boot_exit();
666	}
667
668	} // boot_check_core()
669
670	/*********************************************************************************
671	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
672	* It returns the number of CP0s actually activated.
673	********************************************************************************/
674	static uint32_t boot_wake_all_cp0s( void )
675	{
676	archinfo_header_t* header; // Pointer on ARCHINFO header
677	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
678	archinfo_cluster_t* cluster; // Iterator for loop on clusters
679	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
680	archinfo_device_t* device; // Iterator for loop on devices
681	uint32_t cp0_nb = 0; // CP0s counter
682
683	header = (archinfo_header_t*)ARCHINFO_BASE;
684	cluster_base = archinfo_get_cluster_base(header);
685	device_base = archinfo_get_device_base (header);
686
687	// loop on all clusters
688	for (cluster = cluster_base;
689	cluster < &cluster_base[header->x_size * header->y_size];
690	cluster++)
691	{
692	// Skip boot cluster.
693	if (cluster->cxy == BOOT_CORE_CXY)
694	continue;
695
696	// Skip clusters without core (thus without CP0).
697	if (cluster->cores == 0)
698	continue;
699
700	// Skip clusters without device (thus without XICU).
701	if (cluster->devices == 0)
702	continue;
703
704	// search XICU device associated to CP0, and send a WTI to activate it
705	for (device = &device_base[cluster->device_offset];
706	device < &device_base[cluster->device_offset + cluster->devices];
707	device++)
708	{
709	if (device->type == DEV_TYPE_ICU_XCU)
710	{
711
712	#if DEBUG_BOOT_WAKUP
713	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
714	cluster->cxy , boot_get_proctime );
715	#endif
716
717	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
718	cp0_nb++;
719	}
720	}
721	}
722	return cp0_nb;
723
724	} // boot_wake_cp0()
725
726	/*********************************************************************************
727	* This function is called by all CP0 to activate the other CPi cores.
728	* @ boot_info : pointer to local 'boot_info_t' structure.
729	*********************************************************************************/
730	static void boot_wake_local_cores(boot_info_t * boot_info)
731	{
732	unsigned int core_id;
733
734	// get pointer on XCU device descriptor in boot_info
735	boot_device_t * xcu = &boot_info->int_dev[0];
736
737	// loop on cores
738	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
739	{
740
741	#if DEBUG_BOOT_WAKUP
742	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
743	boot_info->cxy , core_id , boot_get_proctime() );
744	#endif
745	// send an IPI
746	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
747	}
748	} // boot_wake_local_cores()
749
750
751	/*********************************************************************************
752	* This main function of the boot-loader is called by the boot_entry()
753	* function, and executed by all cores.
754	* The arguments values are computed by the boot_entry code.
755	* @ lid : core local identifier,
756	* @ cxy : cluster identifier,
757	*********************************************************************************/
758	void boot_loader( lid_t lid,
759	cxy_t cxy )
760	{
761	boot_info_t * boot_info; // pointer on local boot_info_t structure
762
763	if (lid == 0)
764	{
765	/****************************************************
766	* PHASE A : only CP0 in boot cluster executes it
767	***************************************************/
768	if (cxy == BOOT_CORE_CXY)
769	{
770	boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n",
771	cxy , lid , boot_get_proctime() );
772
773	// Initialize IOC driver
774	if (USE_IOC_BDV) boot_bdv_init();
775	else if (USE_IOC_HBA) boot_hba_init();
776	// else if (USE_IOC_SDC) boot_sdc_init();
777	// else if (USE_IOC_SPI) boot_spi_init();
778	else if (!USE_IOC_RDK)
779	{
780	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
781	boot_exit();
782	}
783
784	// Initialize FAT32.
785	boot_fat32_init();
786
787	// Load the 'kernel.elf' file into memory from IOC, and set
788	// the global variables defining the kernel layout
789	boot_kernel_load();
790
791	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
792	cxy , lid , boot_get_proctime() );
793
794	// Load the arch_info.bin file into memory.
795	boot_archinfo_load();
796
797	// Get local boot_info_t structure base address.
798	// It is the first structure in the .kdata segment.
799	boot_info = (boot_info_t *)seg_kdata_base;
800
801	// Initialize local boot_info_t structure.
802	boot_info_init( boot_info , cxy );
803
804	// check boot_info signature
805	if (boot_info->signature != BOOT_INFO_SIGNATURE)
806	{
807	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
808	" illegal boot_info signature / should be %x\n",
809	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
810	boot_exit();
811	}
812
813	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
814	cxy , lid , boot_get_proctime() );
815
816	// Check core information.
817	boot_check_core(boot_info, lid);
818
819	// Activate other CP0s / get number of active CP0s
820	active_cp0s_nr = boot_wake_all_cp0s() + 1;
821
822	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
823	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
824	active_cp0s_nr );
825
826	// activate other local cores
827	boot_wake_local_cores( boot_info );
828
829	// display address extensions
830	// uint32_t cp2_data_ext;
831	// uint32_t cp2_ins_ext;
832	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
833	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
834	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
835	// cxy , lid , cp2_data_ext , cp2_ins_ext );
836
837	// Wait until all local cores in cluster ready
838	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
839	boot_info->cores_nr );
840	}
841	/******************************************************************
842	* PHASE B : all CP0s other than CP0 in boot cluster execute it
843	*****************************************************************/
844	else
845	{
846	// at this point, all INSTRUCTION address extension registers
847	// point on cluster(0,0), but the DATA extension registers point
848	// already on the local cluster to use the local stack.
849	// To access the bootloader global variables we must first copy
850	// the boot code (data and instructions) in the local cluster.
851	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
852	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
853	BOOT_MAX_SIZE );
854
855	// from now, it is safe to refer to the boot code global variables
856	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
857	cxy , lid , boot_get_proctime() );
858
859	// switch to the INSTRUCTION local memory space, to avoid contention.
860	asm volatile("mtc2 %0, $25" :: "r"(cxy));
861
862	// Copy the arch_info.bin file into the local memory.
863	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
864	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
865	ARCHINFO_MAX_SIZE );
866
867	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
868	cxy , lid , boot_get_proctime() );
869
870	// Copy the kcode segment into local memory
871	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
872	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
873	seg_kcode_size );
874
875	// Copy the kdata segment into local memory
876	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
877	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
878	seg_kdata_size );
879
880	// Copy the kentry segment into local memory
881	boot_remote_memcpy( XPTR( cxy , seg_kentry_base ),
882	XPTR( BOOT_CORE_CXY , seg_kentry_base ),
883	seg_kentry_size );
884
885	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
886	cxy , lid , boot_get_proctime() );
887
888	// Get local boot_info_t structure base address.
889	boot_info = (boot_info_t*)seg_kdata_base;
890
891	// Initialize local boot_info_t structure.
892	boot_info_init( boot_info , cxy );
893
894	// Check core information.
895	boot_check_core( boot_info , lid );
896
897	// get number of active clusters from BOOT_CORE cluster
898	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
899
900	// Wait until all clusters (i.e all CP0s) ready to enter kernel
901	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
902
903	// activate other local cores
904	boot_wake_local_cores( boot_info );
905
906	// display address extensions
907	// uint32_t cp2_data_ext;
908	// uint32_t cp2_ins_ext;
909	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
910	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
911	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
912	// cxy , lid , cp2_data_ext , cp2_ins_ext );
913
914	// Wait until all local cores in cluster ready
915	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
916	boot_info->cores_nr );
917	}
918	}
919	else
920	{
921	/***************************************************************
922	* PHASE C: all non CP0 cores in all clusters execute it
923	**************************************************************/
924
925	// Switch to the INSTRUCTIONS local memory space
926	// to avoid contention at the boot cluster.
927	asm volatile("mtc2 %0, $25" :: "r"(cxy));
928
929	// Get local boot_info_t structure base address.
930	boot_info = (boot_info_t *)seg_kdata_base;
931
932	// Check core information
933	boot_check_core(boot_info, lid);
934
935	// display address extensions
936	// uint32_t cp2_data_ext;
937	// uint32_t cp2_ins_ext;
938	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
939	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
940	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
941	// cxy , lid , cp2_data_ext , cp2_ins_ext );
942
943	// Wait until all local cores in cluster ready
944	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
945	}
946
947	// Each core initialise the following registers before jumping to kernel:
948	// - sp_29 : stack pointer on idle thread,
949	// - c0_sr : reset BEV bit
950	// - a0_04 : pointer on boot_info structure
951	// - c0_ebase : kentry_base(and jump to kernel_entry.
952
953	// The array of idle-thread descriptors is allocated in the kdata segment,
954	// just after the boot_info structure
955	uint32_t sp;
956	uint32_t base;
957	uint32_t offset = sizeof( boot_info_t );
958	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
959	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
960
961	// compute base address of idle thread descriptors array
962	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
963	else base = seg_kdata_base + offset;
964
965	// compute stack pointer
966	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
967
968	asm volatile( "mfc0 $27, $12 \n"
969	"lui $26, 0xFFBF \n"
970	"ori $26, $26, 0xFFFF \n"
971	"and $27, $27, $26 \n"
972	"mtc0 $27, $12 \n"
973	"move $4, %0 \n"
974	"move $29, %1 \n"
975	"mtc0 %2, $15, 1 \n"
976	"jr %3 \n"
977	:
978	: "r"(boot_info) ,
979	"r"(sp) ,
980	"r"(boot_info->kentry_base) ,
981	"r"(kernel_entry)
982	: "$26" , "$27" , "$29" , "$4" );
983
984
985	} // boot_loader()

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