Context Navigation

source: trunk/boot/tsar_mips32/boot.c @ 535

Last change on this file since 535 was 535, checked in by nicolas.van.phan@…, 6 years ago
Replace TXT0 by MTTY0 for LETI
File size: 39.6 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( boot_device_types_t dev_type ) {
126	switch (dev_type) {
127	case DEV_TYPE_RAM_SCL: return "RAM_SCL";
128	case DEV_TYPE_ROM_SCL: return "ROM_SCL";
129	case DEV_TYPE_FBF_SCL: return "FBF_SCL";
130	case DEV_TYPE_IOB_TSR: return "IOB_TSR";
131	case DEV_TYPE_IOC_BDV: return "IOC_BDV";
132	case DEV_TYPE_IOC_HBA: return "IOC_HBA";
133	case DEV_TYPE_IOC_SDC: return "IOC_SDC";
134	case DEV_TYPE_IOC_SPI: return "IOC_SPI";
135	case DEV_TYPE_IOC_RDK: return "IOC_RDK";
136	case DEV_TYPE_MMC_TSR: return "MMC_TSR";
137	case DEV_TYPE_DMA_SCL: return "DMA_SCL";
138	case DEV_TYPE_NIC_CBF: return "NIC_CBF";
139	case DEV_TYPE_TIM_SCL: return "TIM_SCL";
140	case DEV_TYPE_TXT_TTY: return "TXT_TTY";
141	case DEV_TYPE_ICU_XCU: return "ICU_XCU";
142	case DEV_TYPE_PIC_TSR: return "PIC_TSR";
143	default: return "undefined";
144	}
145	}
146
147	/************************************************************************************
148	* This function loads the arch_info.bin file into the boot cluster memory.
149	***********************************************************************************/
150	static void boot_archinfo_load( void )
151	{
152	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
153
154	// Load file into memory
155	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
156	{
157	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
158	"<%s> file not found\n",
159	ARCHINFO_PATHNAME);
160	boot_exit();
161	}
162
163	if (header->signature != ARCHINFO_SIGNATURE)
164	{
165	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
166	"<%s> file signature should be %x\n",
167	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
168	boot_exit();
169	}
170
171	#if DEBUG_BOOT_INFO
172	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
173	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
174	#endif
175
176	} // boot_archinfo_load()
177
178	/**************************************************************************************
179	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
180	* analyzes it, and places the three kcode, kentry, kdata segments at their final
181	* physical adresses (defined the .elf file).
182	* It set the global variables defining the kernel layout.
183	*************************************************************************************/
184	static void boot_kernel_load( void )
185	{
186	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
187	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
188	uint32_t phdr_offset; // program header offset in kernel.elf file.
189	uint32_t segments_nb; // number of segments in kernel.elf file.
190	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
191	uint32_t seg_paddr; // segment local physical address of segment
192	uint32_t seg_offset; // segment offset in kernel.elf file
193	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
194	uint32_t seg_memsz; // segment size (bytes) in memory image.
195	bool_t kcode_found; // kcode segment found.
196	bool_t kdata_found; // kdata segment found.
197	bool_t kentry_found; // kentry segment found.
198	uint32_t seg_id; // iterator for segments loop.
199
200	#if DEBUG_BOOT_ELF
201	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
202	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
203	#endif
204
205	// Load kernel.elf file into memory buffer
206	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
207	{
208	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
209	KERNEL_PATHNAME);
210	boot_exit();
211	}
212
213	// get pointer to kernel.elf header
214	elf_header = (Elf32_Ehdr*)KERN_BASE;
215
216	// check signature
217	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
218	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
219	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
220	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
221	{
222	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
223	"<%s> is not an ELF file\n",
224	KERNEL_PATHNAME);
225	boot_exit();
226	}
227
228	// Get program header table offset and number of segments
229	phdr_offset = elf_header->e_phoff;
230	segments_nb = elf_header->e_phnum;
231
232	// Get program header table pointer
233	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
234
235	// loop on segments
236	kcode_found = false;
237	kdata_found = false;
238	kentry_found = false;
239	for (seg_id = 0; seg_id < segments_nb; seg_id++)
240	{
241	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
242	{
243	// Get segment attributes.
244	seg_paddr = program_header[seg_id].p_paddr;
245	seg_offset = program_header[seg_id].p_offset;
246	seg_filesz = program_header[seg_id].p_filesz;
247	seg_memsz = program_header[seg_id].p_memsz;
248
249	// get segment base address in buffer
250	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
251
252	// Load segment to its final physical memory address
253	boot_memcpy( (void*)seg_paddr,
254	(void*)seg_src_addr,
255	seg_filesz );
256
257	#if DEBUG_BOOT_ELF
258	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
259	" base = %x / size = %x\n",
260	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
261	#endif
262
263	// Fill remaining memory with zero if (filesz < memsz).
264	if( seg_memsz < seg_filesz )
265	{
266	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
267	}
268
269	// Note: we suppose that the 'kernel.elf' file contains exactly
270	// three loadable segments ktext, kentry, & kdata:
271	// - the kcode segment is read-only and base == KCODE_BASE
272	// - the kentry segment is read-only and base == KENTRY_BASE
273
274	if( ((program_header[seg_id].p_flags & PF_W) == 0) &&
275	(program_header[seg_id].p_paddr == KCODE_BASE) ) // kcode segment
276	{
277	if( kcode_found )
278	{
279	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
280	" two kcode segments found\n",
281	__FUNCTION__ , KERNEL_PATHNAME );
282	boot_exit();
283	}
284
285	kcode_found = true;
286	seg_kcode_base = seg_paddr;
287	seg_kcode_size = seg_memsz;
288	}
289	else if( program_header[seg_id].p_paddr == KENTRY_BASE ) // kentry segment
290	{
291	if( kentry_found )
292	{
293	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
294	" two kentry segments found\n",
295	__FUNCTION__ , KERNEL_PATHNAME );
296	boot_exit();
297	}
298
299	kentry_found = true;
300	seg_kentry_base = seg_paddr;
301	seg_kentry_size = seg_memsz;
302	}
303	else // kdata segment
304	{
305	if( kdata_found )
306	{
307	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
308	" two loadable kdata segments found\n",
309	__FUNCTION__ , KERNEL_PATHNAME );
310	boot_exit();
311	}
312
313	kdata_found = true;
314	seg_kdata_base = seg_paddr;
315	seg_kdata_size = seg_memsz;
316	}
317	}
318	}
319
320	// check kcode & kdata segments found
321	if( kcode_found == false )
322	{
323	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n",
324	__FUNCTION__ , KERNEL_PATHNAME );
325	boot_exit();
326	}
327	if( kentry_found == false )
328	{
329	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry not found\n",
330	__FUNCTION__ , KERNEL_PATHNAME );
331	boot_exit();
332	}
333	if( kdata_found == false )
334	{
335	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n",
336	__FUNCTION__ , KERNEL_PATHNAME );
337	boot_exit();
338	}
339
340	// check segments sizes
341	if( seg_kentry_size > KENTRY_MAX_SIZE )
342	{
343	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry too large\n",
344	__FUNCTION__ , KERNEL_PATHNAME );
345	boot_exit();
346	}
347
348	if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE )
349	{
350	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n",
351	__FUNCTION__ , KERNEL_PATHNAME );
352	}
353
354	// set entry point
355	kernel_entry = (uint32_t)elf_header->e_entry;
356
357	#if DEBUG_BOOT_ELF
358	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
359	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
360	#endif
361
362	} // boot_kernel_load()
363
364	/*************************************************************************************
365	* This function initializes the boot_info_t structure for a given cluster.
366	* @ boot_info : pointer to local boot_info_t structure
367	* @ cxy : cluster identifier
368	************************************************************************************/
369	static void boot_info_init( boot_info_t * boot_info,
370	cxy_t cxy )
371	{
372	archinfo_header_t * header;
373	archinfo_core_t * core_base;
374	archinfo_cluster_t * cluster_base;
375	archinfo_device_t * device_base;
376	archinfo_irq_t * irq_base;
377
378	archinfo_cluster_t * cluster;
379	archinfo_cluster_t * my_cluster = NULL; // target cluster
380	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
381
382	archinfo_core_t * core;
383	uint32_t core_id;
384	archinfo_device_t * device;
385	uint32_t device_id;
386	archinfo_irq_t * irq;
387	uint32_t irq_id;
388	uint32_t end;
389	boot_device_t * boot_dev;
390
391	// get pointer on ARCHINFO header and on the four arch_info arrays
392	header = (archinfo_header_t*)ARCHINFO_BASE;
393	core_base = archinfo_get_core_base (header);
394	cluster_base = archinfo_get_cluster_base(header);
395	device_base = archinfo_get_device_base (header);
396	irq_base = archinfo_get_irq_base (header);
397
398	// Initialize global platform parameters
399	boot_info->x_size = header->x_size;
400	boot_info->y_size = header->y_size;
401	boot_info->x_width = header->x_width;
402	boot_info->y_width = header->y_width;
403	boot_info->x_max = header->x_size; // [FIXME]
404	boot_info->y_max = header->name[5] == 'l' ? header->y_size - 1 : header->y_size; // [FIXME]
405	boot_info->use_mty0 = header->name[5] == 'l' ? true : false;
406	boot_info->paddr_width = header->paddr_width;
407	boot_info->io_cxy = header->io_cxy;
408
409	// Initialize kernel segments from global variables
410	boot_info->kcode_base = seg_kcode_base;
411	boot_info->kcode_size = seg_kcode_size;
412	boot_info->kdata_base = seg_kdata_base;
413	boot_info->kdata_size = seg_kdata_size;
414	boot_info->kentry_base = seg_kentry_base;
415	boot_info->kentry_size = seg_kentry_size;
416
417	// loop on arch_info clusters to get relevant pointers
418	for (cluster = cluster_base;
419	cluster < &cluster_base[header->x_size * header->y_size];
420	cluster++)
421	{
422	if( cluster->cxy == cxy ) my_cluster = cluster;
423	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
424	}
425
426	if( my_cluster == NULL )
427	{
428	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
429	__FUNCTION__ , cxy );
430	boot_exit();
431	}
432
433	if( io_cluster == NULL )
434	{
435	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
436	__FUNCTION__ , header->io_cxy );
437	boot_exit();
438	}
439
440	//////////////////////////////////////////////////////////
441	// initialize the boot_info array of external peripherals
442
443	#if DEBUG_BOOT_INFO
444	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
445	__FUNCTION__ , boot_get_proctime() );
446	#endif
447
448	device_id = 0;
449	for (device = &device_base[io_cluster->device_offset];
450	device < &device_base[io_cluster->device_offset + io_cluster->devices];
451	device++ )
452	{
453	if( device_id >= CONFIG_MAX_EXT_DEV )
454	{
455	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
456	__FUNCTION__ );
457	boot_exit();
458	}
459
460	// keep only external devices
461	if( (device->type != DEV_TYPE_RAM_SCL) &&
462	(device->type != DEV_TYPE_ICU_XCU) &&
463	(device->type != DEV_TYPE_MMC_TSR) &&
464	(device->type != DEV_TYPE_DMA_SCL) )
465	{
466	boot_dev = &boot_info->ext_dev[device_id];
467
468	boot_dev->type = device->type;
469	boot_dev->base = device->base;
470	boot_dev->channels = device->channels;
471	boot_dev->param0 = device->arg0;
472	boot_dev->param1 = device->arg1;
473	boot_dev->param2 = device->arg2;
474	boot_dev->param3 = device->arg3;
475	boot_dev->irqs = device->irqs;
476
477	device_id++;
478
479	#if DEBUG_BOOT_INFO
480	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
481	device_type_str( device->type ) , device->base , device->size ,
482	device->channels , device->irqs );
483	#endif
484	}
485
486	// handle IRQs for PIC
487	if (device->type == DEV_TYPE_PIC_TSR)
488	{
489	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
490	{
491	boot_dev->irq[irq_id].valid = 0;
492	}
493
494	for (irq = &irq_base[device->irq_offset];
495	irq < &irq_base[device->irq_offset + device->irqs];
496	irq++)
497	{
498	boot_dev->irq[irq->port].valid = 1;
499	boot_dev->irq[irq->port].dev_type = irq->dev_type;
500	boot_dev->irq[irq->port].channel = irq->channel;
501	boot_dev->irq[irq->port].is_rx = irq->is_rx;
502
503	#if DEBUG_BOOT_INFO
504	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
505	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
506	#endif
507	}
508	}
509	} // end loop on io_cluster peripherals
510
511	// initialize number of external peripherals
512	boot_info->ext_dev_nr = device_id;
513
514	// Initialize cluster specific resources
515	boot_info->cxy = my_cluster->cxy;
516
517	#if DEBUG_BOOT_INFO
518	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
519	#endif
520
521	////////////////////////////////////////
522	// Initialize array of core descriptors
523	core_id = 0;
524	for (core = &core_base[my_cluster->core_offset];
525	core < &core_base[my_cluster->core_offset + my_cluster->cores];
526	core++ )
527	{
528	boot_info->core[core_id].gid = (gid_t)core->gid;
529	boot_info->core[core_id].lid = (lid_t)core->lid;
530	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
531
532	#if DEBUG_BOOT_INFO
533	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
534	core->gid , core->cxy , core->lid );
535	#endif
536	core_id++;
537	}
538
539	// Initialize number of cores in my_cluster
540	boot_info->cores_nr = core_id;
541
542	//////////////////////////////////////////////////////////////////////
543	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
544
545	#if DEBUG_BOOT_INFO
546	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
547	#endif
548
549	device_id = 0;
550	for (device = &device_base[my_cluster->device_offset];
551	device < &device_base[my_cluster->device_offset + my_cluster->devices];
552	device++ )
553	{
554	// keep only internal devices
555	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
556	(device->type == DEV_TYPE_ICU_XCU) \|\|
557	(device->type == DEV_TYPE_MMC_TSR) \|\|
558	(device->type == DEV_TYPE_DMA_SCL) \|\|
559	(device->type == DEV_TYPE_TXT_MTY) )
560	{
561	if (device->type == DEV_TYPE_RAM_SCL) // RAM
562	{
563	// set number of physical memory pages
564	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
565
566	#if DEBUG_BOOT_INFO
567	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
568	#endif
569	}
570	else // ICU / MMC / DMA / MTY
571	{
572	if( device_id >= CONFIG_MAX_INT_DEV )
573	{
574	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
575	__FUNCTION__ , cxy );
576	boot_exit();
577	}
578
579	boot_dev = &boot_info->int_dev[device_id];
580
581	boot_dev->type = device->type;
582	boot_dev->base = device->base;
583	boot_dev->channels = device->channels;
584	boot_dev->param0 = device->arg0;
585	boot_dev->param1 = device->arg1;
586	boot_dev->param2 = device->arg2;
587	boot_dev->param3 = device->arg3;
588	boot_dev->irqs = device->irqs;
589
590	device_id++;
591
592	#if DEBUG_BOOT_INFO
593	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
594	device_type_str( device->type ) , device->base , device->size ,
595	device->channels , device->irqs );
596	#endif
597
598	// handle IRQs for ICU
599	if (device->type == DEV_TYPE_ICU_XCU)
600	{
601	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
602	{
603	boot_dev->irq[irq_id].valid = 0;
604	}
605
606	for (irq = &irq_base[device->irq_offset];
607	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
608	{
609	boot_dev->irq[irq->port].valid = 1;
610	boot_dev->irq[irq->port].dev_type = irq->dev_type;
611	boot_dev->irq[irq->port].channel = irq->channel;
612	boot_dev->irq[irq->port].is_rx = irq->is_rx;
613
614	#if DEBUG_BOOT_INFO
615	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
616	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
617	#endif
618
619	}
620	}
621	}
622	}
623	} // end loop on local peripherals
624
625	// initialize number of internal peripherals
626	boot_info->int_dev_nr = device_id;
627
628	// Get the top address of the kernel segments
629	end = boot_info->kdata_base + boot_info->kdata_size;
630
631	// compute number of physical pages occupied by the kernel code
632	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
633	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
634
635	// no reserved sones for TSAR architecture
636	boot_info->rsvd_nr = 0;
637
638	// set boot_info signature
639	boot_info->signature = BOOT_INFO_SIGNATURE;
640
641	} // boot_info_init()
642
643	/***********************************************************************************
644	* This function check the local boot_info_t structure for a given core.
645	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
646	* @ lid : core local identifier, index the core descriptor table.
647	**********************************************************************************/
648	static void boot_check_core( boot_info_t * boot_info,
649	lid_t lid)
650	{
651	gid_t gid; // global hardware identifier of this core
652	boot_core_t * this; // BOOT_INFO core descriptor of this core.
653
654	// Get core hardware identifier
655	gid = (gid_t)boot_get_procid();
656
657	// get pointer on core descriptor
658	this = &boot_info->core[lid];
659
660	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
661	{
662	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
663	" - boot_info cxy = %x\n"
664	" - boot_info lid = %d\n"
665	" - boot_info gid = %x\n"
666	" - actual gid = %x\n",
667	this->cxy , this->lid , this->gid , gid );
668	boot_exit();
669	}
670
671	} // boot_check_core()
672
673	/*********************************************************************************
674	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
675	* It returns the number of CP0s actually activated.
676	********************************************************************************/
677	static uint32_t boot_wake_all_cp0s( void )
678	{
679	archinfo_header_t* header; // Pointer on ARCHINFO header
680	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
681	archinfo_cluster_t* cluster; // Iterator for loop on clusters
682	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
683	archinfo_device_t* device; // Iterator for loop on devices
684	uint32_t cp0_nb = 0; // CP0s counter
685
686	header = (archinfo_header_t*)ARCHINFO_BASE;
687	cluster_base = archinfo_get_cluster_base(header);
688	device_base = archinfo_get_device_base (header);
689
690	// loop on all clusters
691	for (cluster = cluster_base;
692	cluster < &cluster_base[header->x_size * header->y_size];
693	cluster++)
694	{
695	// Skip boot cluster.
696	if (cluster->cxy == BOOT_CORE_CXY)
697	continue;
698
699	// Skip clusters without core (thus without CP0).
700	if (cluster->cores == 0)
701	continue;
702
703	// Skip clusters without device (thus without XICU).
704	if (cluster->devices == 0)
705	continue;
706
707	// search XICU device associated to CP0, and send a WTI to activate it
708	for (device = &device_base[cluster->device_offset];
709	device < &device_base[cluster->device_offset + cluster->devices];
710	device++)
711	{
712	if (device->type == DEV_TYPE_ICU_XCU)
713	{
714
715	#if DEBUG_BOOT_WAKUP
716	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
717	cluster->cxy , boot_get_proctime );
718	#endif
719
720	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
721	cp0_nb++;
722	}
723	}
724	}
725	return cp0_nb;
726
727	} // boot_wake_cp0()
728
729	/*********************************************************************************
730	* This function is called by all CP0 to activate the other CPi cores.
731	* @ boot_info : pointer to local 'boot_info_t' structure.
732	*********************************************************************************/
733	static void boot_wake_local_cores(boot_info_t * boot_info)
734	{
735	unsigned int core_id;
736
737	// get pointer on XCU device descriptor in boot_info
738	boot_device_t * xcu = &boot_info->int_dev[0];
739
740	// loop on cores
741	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
742	{
743
744	#if DEBUG_BOOT_WAKUP
745	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
746	boot_info->cxy , core_id , boot_get_proctime() );
747	#endif
748	// send an IPI
749	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
750	}
751	} // boot_wake_local_cores()
752
753
754	/*********************************************************************************
755	* This main function of the boot-loader is called by the boot_entry()
756	* function, and executed by all cores.
757	* The arguments values are computed by the boot_entry code.
758	* @ lid : core local identifier,
759	* @ cxy : cluster identifier,
760	*********************************************************************************/
761	void boot_loader( lid_t lid,
762	cxy_t cxy )
763	{
764	boot_info_t * boot_info; // pointer on local boot_info_t structure
765
766	if (lid == 0)
767	{
768	/****************************************************
769	* PHASE A : only CP0 in boot cluster executes it
770	***************************************************/
771	if (cxy == BOOT_CORE_CXY)
772	{
773	boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n",
774	cxy , lid , boot_get_proctime() );
775
776	// Initialize IOC driver
777	if (USE_IOC_BDV) boot_bdv_init();
778	else if (USE_IOC_HBA) boot_hba_init();
779	// else if (USE_IOC_SDC) boot_sdc_init();
780	// else if (USE_IOC_SPI) boot_spi_init();
781	else if (!USE_IOC_RDK)
782	{
783	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
784	boot_exit();
785	}
786
787	// Initialize FAT32.
788	boot_fat32_init();
789
790	// Load the 'kernel.elf' file into memory from IOC, and set
791	// the global variables defining the kernel layout
792	boot_kernel_load();
793
794	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
795	cxy , lid , boot_get_proctime() );
796
797	// Load the arch_info.bin file into memory.
798	boot_archinfo_load();
799
800	// Get local boot_info_t structure base address.
801	// It is the first structure in the .kdata segment.
802	boot_info = (boot_info_t *)seg_kdata_base;
803
804	// Initialize local boot_info_t structure.
805	boot_info_init( boot_info , cxy );
806
807	// check boot_info signature
808	if (boot_info->signature != BOOT_INFO_SIGNATURE)
809	{
810	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
811	" illegal boot_info signature / should be %x\n",
812	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
813	boot_exit();
814	}
815
816	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
817	cxy , lid , boot_get_proctime() );
818
819	// Check core information.
820	boot_check_core(boot_info, lid);
821
822	// Activate other CP0s / get number of active CP0s
823	active_cp0s_nr = boot_wake_all_cp0s() + 1;
824
825	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
826	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
827	active_cp0s_nr );
828
829	// activate other local cores
830	boot_wake_local_cores( boot_info );
831
832	// display address extensions
833	// uint32_t cp2_data_ext;
834	// uint32_t cp2_ins_ext;
835	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
836	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
837	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
838	// cxy , lid , cp2_data_ext , cp2_ins_ext );
839
840	// Wait until all local cores in cluster ready
841	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
842	boot_info->cores_nr );
843	}
844	/******************************************************************
845	* PHASE B : all CP0s other than CP0 in boot cluster execute it
846	*****************************************************************/
847	else
848	{
849	// at this point, all INSTRUCTION address extension registers
850	// point on cluster(0,0), but the DATA extension registers point
851	// already on the local cluster to use the local stack.
852	// To access the bootloader global variables we must first copy
853	// the boot code (data and instructions) in the local cluster.
854	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
855	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
856	BOOT_MAX_SIZE );
857
858	// from now, it is safe to refer to the boot code global variables
859	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
860	cxy , lid , boot_get_proctime() );
861
862	// switch to the INSTRUCTION local memory space, to avoid contention.
863	asm volatile("mtc2 %0, $25" :: "r"(cxy));
864
865	// Copy the arch_info.bin file into the local memory.
866	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
867	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
868	ARCHINFO_MAX_SIZE );
869
870	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
871	cxy , lid , boot_get_proctime() );
872
873	// Copy the kcode segment into local memory
874	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
875	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
876	seg_kcode_size );
877
878	// Copy the kdata segment into local memory
879	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
880	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
881	seg_kdata_size );
882
883	// Copy the kentry segment into local memory
884	boot_remote_memcpy( XPTR( cxy , seg_kentry_base ),
885	XPTR( BOOT_CORE_CXY , seg_kentry_base ),
886	seg_kentry_size );
887
888	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
889	cxy , lid , boot_get_proctime() );
890
891	// Get local boot_info_t structure base address.
892	boot_info = (boot_info_t*)seg_kdata_base;
893
894	// Initialize local boot_info_t structure.
895	boot_info_init( boot_info , cxy );
896
897	// Check core information.
898	boot_check_core( boot_info , lid );
899
900	// get number of active clusters from BOOT_CORE cluster
901	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
902
903	// Wait until all clusters (i.e all CP0s) ready to enter kernel
904	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
905
906	// activate other local cores
907	boot_wake_local_cores( boot_info );
908
909	// display address extensions
910	// uint32_t cp2_data_ext;
911	// uint32_t cp2_ins_ext;
912	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
913	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
914	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
915	// cxy , lid , cp2_data_ext , cp2_ins_ext );
916
917	// Wait until all local cores in cluster ready
918	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
919	boot_info->cores_nr );
920	}
921	}
922	else
923	{
924	/***************************************************************
925	* PHASE C: all non CP0 cores in all clusters execute it
926	**************************************************************/
927
928	// Switch to the INSTRUCTIONS local memory space
929	// to avoid contention at the boot cluster.
930	asm volatile("mtc2 %0, $25" :: "r"(cxy));
931
932	// Get local boot_info_t structure base address.
933	boot_info = (boot_info_t *)seg_kdata_base;
934
935	// Check core information
936	boot_check_core(boot_info, lid);
937
938	// display address extensions
939	// uint32_t cp2_data_ext;
940	// uint32_t cp2_ins_ext;
941	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
942	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
943	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
944	// cxy , lid , cp2_data_ext , cp2_ins_ext );
945
946	// Wait until all local cores in cluster ready
947	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
948	}
949
950	// Each core initialise the following registers before jumping to kernel:
951	// - sp_29 : stack pointer on idle thread,
952	// - c0_sr : reset BEV bit
953	// - a0_04 : pointer on boot_info structure
954	// - c0_ebase : kentry_base(and jump to kernel_entry.
955
956	// The array of idle-thread descriptors is allocated in the kdata segment,
957	// just after the boot_info structure
958	uint32_t sp;
959	uint32_t base;
960	uint32_t offset = sizeof( boot_info_t );
961	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
962	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
963
964	// compute base address of idle thread descriptors array
965	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
966	else base = seg_kdata_base + offset;
967
968	// compute stack pointer
969	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
970
971	asm volatile( "mfc0 $27, $12 \n"
972	"lui $26, 0xFFBF \n"
973	"ori $26, $26, 0xFFFF \n"
974	"and $27, $27, $26 \n"
975	"mtc0 $27, $12 \n"
976	"move $4, %0 \n"
977	"move $29, %1 \n"
978	"mtc0 %2, $15, 1 \n"
979	"jr %3 \n"
980	:
981	: "r"(boot_info) ,
982	"r"(sp) ,
983	"r"(boot_info->kentry_base) ,
984	"r"(kernel_entry)
985	: "$26" , "$27" , "$29" , "$4" );
986
987
988	} // boot_loader()

Note: See TracBrowser for help on using the repository browser.

Download in other formats: