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boot.c @ 552

Last change on this file since 552 was 552, checked in by nicolas.van.phan@…, 6 years ago

Stop fetching instructions from local cluster

At the beginning of the bootloader, all cores in all clusters fetch
their instruction from the memory bank of *cluster 00*.
After replication of the code in all cluster, the cores would
fetch their instruction in their own cluster.
However, to do this, they have to write to coprocessor 2 register 25,
which doesn't exist on the real LETI machine.
As a consequence, this feature has been removed, bringing a contention
point since all cluster now fetch instructions from cluster 00.
This issue will have to be solved in the future.

File size: 39.8 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_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_spi_driver.h>
85	#include <boot_tty_driver.h>
86
87	/*****************************************************************************
88	* Macros.
89	****************************************************************************/
90
91	#define PAGE_ROUND_DOWN(x) ((x) & (~PPM_PAGE_SIZE -1))
92	#define PAGE_ROUND_UP(x) (((x) + PPM_PAGE_SIZE-1) & \
93	(~(PPM_PAGE_SIZE-1)))
94
95	/*****************************************************************************
96	* Global variables.
97	****************************************************************************/
98
99	// synchronization variables.
100
101	volatile boot_remote_spinlock_t tty0_lock; // protect TTY0 access
102	volatile boot_remote_barrier_t global_barrier; // synchronize CP0 cores
103	volatile boot_remote_barrier_t local_barrier; // synchronize cores in one cluster
104	uint32_t active_cp0s_nr; // number of expected CP0s
105
106	// kernel segments layout variables
107
108	uint32_t seg_kcode_base; // kcode segment base address
109	uint32_t seg_kcode_size; // kcode segment size (bytes)
110	uint32_t seg_kdata_base; // kdata segment base address
111	uint32_t seg_kdata_size; // kdata segment size (bytes)
112	uint32_t seg_kentry_base; // kcode segment base address
113	uint32_t seg_kentry_size; // kcode segment size (bytes)
114
115	uint32_t kernel_entry; // kernel entry point
116
117	// address used by the WTI to activate remote CP0s
118
119	// Functions called by boot_entry.S must be externs.
120	extern void boot_entry( void ); // boot_loader entry point
121	extern void boot_loader( lid_t lid, cxy_t cxy );
122
123	/*********************************************************************************
124	* This function returns the printable string for each device type
125	********************************************************************************/
126	static const char * device_type_str( boot_device_types_t dev_type ) {
127	switch (dev_type) {
128	case DEV_TYPE_RAM_SCL: return "RAM_SCL";
129	case DEV_TYPE_ROM_SCL: return "ROM_SCL";
130	case DEV_TYPE_FBF_SCL: return "FBF_SCL";
131	case DEV_TYPE_IOB_TSR: return "IOB_TSR";
132	case DEV_TYPE_IOC_BDV: return "IOC_BDV";
133	case DEV_TYPE_IOC_HBA: return "IOC_HBA";
134	case DEV_TYPE_IOC_SDC: return "IOC_SDC";
135	case DEV_TYPE_IOC_SPI: return "IOC_SPI";
136	case DEV_TYPE_IOC_RDK: return "IOC_RDK";
137	case DEV_TYPE_MMC_TSR: return "MMC_TSR";
138	case DEV_TYPE_DMA_SCL: return "DMA_SCL";
139	case DEV_TYPE_NIC_CBF: return "NIC_CBF";
140	case DEV_TYPE_TIM_SCL: return "TIM_SCL";
141	case DEV_TYPE_TXT_TTY: return "TXT_TTY";
142	case DEV_TYPE_ICU_XCU: return "ICU_XCU";
143	case DEV_TYPE_PIC_TSR: return "PIC_TSR";
144	default: return "undefined";
145	}
146	}
147
148	/************************************************************************************
149	* This function loads the arch_info.bin file into the boot cluster memory.
150	***********************************************************************************/
151	static void boot_archinfo_load( void )
152	{
153	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
154
155	// Load file into memory
156	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
157	{
158	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
159	"<%s> file not found\n",
160	ARCHINFO_PATHNAME);
161	boot_exit();
162	}
163
164	if (header->signature != ARCHINFO_SIGNATURE)
165	{
166	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
167	"<%s> file signature should be %x\n",
168	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
169	boot_exit();
170	}
171
172	#if DEBUG_BOOT_INFO
173	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
174	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
175	#endif
176
177	} // boot_archinfo_load()
178
179	/**************************************************************************************
180	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
181	* analyzes it, and places the three kcode, kentry, kdata segments at their final
182	* physical adresses (defined the .elf file).
183	* It set the global variables defining the kernel layout.
184	*************************************************************************************/
185	static void boot_kernel_load( void )
186	{
187	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
188	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
189	uint32_t phdr_offset; // program header offset in kernel.elf file.
190	uint32_t segments_nb; // number of segments in kernel.elf file.
191	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
192	uint32_t seg_paddr; // segment local physical address of segment
193	uint32_t seg_offset; // segment offset in kernel.elf file
194	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
195	uint32_t seg_memsz; // segment size (bytes) in memory image.
196	bool_t kcode_found; // kcode segment found.
197	bool_t kdata_found; // kdata segment found.
198	bool_t kentry_found; // kentry segment found.
199	uint32_t seg_id; // iterator for segments loop.
200
201	#if DEBUG_BOOT_ELF
202	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
203	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
204	#endif
205
206	// Load kernel.elf file into memory buffer
207	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
208	{
209	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
210	KERNEL_PATHNAME);
211	boot_exit();
212	}
213
214	// get pointer to kernel.elf header
215	elf_header = (Elf32_Ehdr*)KERN_BASE;
216
217	// check signature
218	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
219	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
220	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
221	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
222	{
223	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
224	"<%s> is not an ELF file\n",
225	KERNEL_PATHNAME);
226	boot_exit();
227	}
228
229	// Get program header table offset and number of segments
230	phdr_offset = elf_header->e_phoff;
231	segments_nb = elf_header->e_phnum;
232
233	// Get program header table pointer
234	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
235
236	// loop on segments
237	kcode_found = false;
238	kdata_found = false;
239	kentry_found = false;
240	for (seg_id = 0; seg_id < segments_nb; seg_id++)
241	{
242	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
243	{
244	// Get segment attributes.
245	seg_paddr = program_header[seg_id].p_paddr;
246	seg_offset = program_header[seg_id].p_offset;
247	seg_filesz = program_header[seg_id].p_filesz;
248	seg_memsz = program_header[seg_id].p_memsz;
249
250	// get segment base address in buffer
251	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
252
253	// Load segment to its final physical memory address
254	boot_memcpy( (void*)seg_paddr,
255	(void*)seg_src_addr,
256	seg_filesz );
257
258	#if DEBUG_BOOT_ELF
259	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
260	" base = %x / size = %x\n",
261	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
262	#endif
263
264	// Fill remaining memory with zero if (filesz < memsz).
265	if( seg_memsz < seg_filesz )
266	{
267	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
268	}
269
270	// Note: we suppose that the 'kernel.elf' file contains exactly
271	// three loadable segments ktext, kentry, & kdata:
272	// - the kcode segment is read-only and base == KCODE_BASE
273	// - the kentry segment is read-only and base == KENTRY_BASE
274
275	if( ((program_header[seg_id].p_flags & PF_W) == 0) &&
276	(program_header[seg_id].p_paddr == KCODE_BASE) ) // kcode segment
277	{
278	if( kcode_found )
279	{
280	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
281	" two kcode segments found\n",
282	__FUNCTION__ , KERNEL_PATHNAME );
283	boot_exit();
284	}
285
286	kcode_found = true;
287	seg_kcode_base = seg_paddr;
288	seg_kcode_size = seg_memsz;
289	}
290	else if( program_header[seg_id].p_paddr == KENTRY_BASE ) // kentry segment
291	{
292	if( kentry_found )
293	{
294	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
295	" two kentry segments found\n",
296	__FUNCTION__ , KERNEL_PATHNAME );
297	boot_exit();
298	}
299
300	kentry_found = true;
301	seg_kentry_base = seg_paddr;
302	seg_kentry_size = seg_memsz;
303	}
304	else // kdata segment
305	{
306	if( kdata_found )
307	{
308	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
309	" two loadable kdata segments found\n",
310	__FUNCTION__ , KERNEL_PATHNAME );
311	boot_exit();
312	}
313
314	kdata_found = true;
315	seg_kdata_base = seg_paddr;
316	seg_kdata_size = seg_memsz;
317	}
318	}
319	}
320
321	// check kcode & kdata segments found
322	if( kcode_found == false )
323	{
324	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n",
325	__FUNCTION__ , KERNEL_PATHNAME );
326	boot_exit();
327	}
328	if( kentry_found == false )
329	{
330	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry not found\n",
331	__FUNCTION__ , KERNEL_PATHNAME );
332	boot_exit();
333	}
334	if( kdata_found == false )
335	{
336	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n",
337	__FUNCTION__ , KERNEL_PATHNAME );
338	boot_exit();
339	}
340
341	// check segments sizes
342	if( seg_kentry_size > KENTRY_MAX_SIZE )
343	{
344	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry too large\n",
345	__FUNCTION__ , KERNEL_PATHNAME );
346	boot_exit();
347	}
348
349	if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE )
350	{
351	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n",
352	__FUNCTION__ , KERNEL_PATHNAME );
353	}
354
355	// set entry point
356	kernel_entry = (uint32_t)elf_header->e_entry;
357
358	#if DEBUG_BOOT_ELF
359	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
360	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
361	#endif
362
363	} // boot_kernel_load()
364
365	/*************************************************************************************
366	* This function initializes the boot_info_t structure for a given cluster.
367	* @ boot_info : pointer to local boot_info_t structure
368	* @ cxy : cluster identifier
369	************************************************************************************/
370	static void boot_info_init( boot_info_t * boot_info,
371	cxy_t cxy )
372	{
373	archinfo_header_t * header;
374	archinfo_core_t * core_base;
375	archinfo_cluster_t * cluster_base;
376	archinfo_device_t * device_base;
377	archinfo_irq_t * irq_base;
378
379	archinfo_cluster_t * cluster;
380	archinfo_cluster_t * my_cluster = NULL; // target cluster
381	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
382
383	archinfo_core_t * core;
384	uint32_t core_id;
385	archinfo_device_t * device;
386	uint32_t device_id;
387	archinfo_irq_t * irq;
388	uint32_t irq_id;
389	uint32_t end;
390	boot_device_t * boot_dev;
391
392	// get pointer on ARCHINFO header and on the four arch_info arrays
393	header = (archinfo_header_t*)ARCHINFO_BASE;
394	core_base = archinfo_get_core_base (header);
395	cluster_base = archinfo_get_cluster_base(header);
396	device_base = archinfo_get_device_base (header);
397	irq_base = archinfo_get_irq_base (header);
398
399	// Initialize global platform parameters
400	boot_info->x_size = header->x_size;
401	boot_info->y_size = header->y_size;
402	boot_info->x_width = header->x_width;
403	boot_info->y_width = header->y_width;
404	boot_info->x_max = header->x_size; // [FIXME]
405	boot_info->y_max = header->name[5] == 'l' ? header->y_size - 1 : header->y_size; // [FIXME]
406	boot_info->use_mty0 = header->name[5] == 'l' ? true : false;
407	boot_info->paddr_width = header->paddr_width;
408	boot_info->io_cxy = header->io_cxy;
409
410	// Initialize kernel segments from global variables
411	boot_info->kcode_base = seg_kcode_base;
412	boot_info->kcode_size = seg_kcode_size;
413	boot_info->kdata_base = seg_kdata_base;
414	boot_info->kdata_size = seg_kdata_size;
415	boot_info->kentry_base = seg_kentry_base;
416	boot_info->kentry_size = seg_kentry_size;
417
418	// loop on arch_info clusters to get relevant pointers
419	for (cluster = cluster_base;
420	cluster < &cluster_base[header->x_size * header->y_size];
421	cluster++)
422	{
423	if( cluster->cxy == cxy ) my_cluster = cluster;
424	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
425	}
426
427	if( my_cluster == NULL )
428	{
429	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
430	__FUNCTION__ , cxy );
431	boot_exit();
432	}
433
434	if( io_cluster == NULL )
435	{
436	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
437	__FUNCTION__ , header->io_cxy );
438	boot_exit();
439	}
440
441	//////////////////////////////////////////////////////////
442	// initialize the boot_info array of external peripherals
443
444	#if DEBUG_BOOT_INFO
445	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
446	__FUNCTION__ , boot_get_proctime() );
447	#endif
448
449	device_id = 0;
450	for (device = &device_base[io_cluster->device_offset];
451	device < &device_base[io_cluster->device_offset + io_cluster->devices];
452	device++ )
453	{
454	if( device_id >= CONFIG_MAX_EXT_DEV )
455	{
456	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
457	__FUNCTION__ );
458	boot_exit();
459	}
460
461	// keep only external devices
462	if( (device->type != DEV_TYPE_RAM_SCL) &&
463	(device->type != DEV_TYPE_ICU_XCU) &&
464	(device->type != DEV_TYPE_MMC_TSR) &&
465	(device->type != DEV_TYPE_DMA_SCL) &&
466	(device->type != DEV_TYPE_TXT_MTY) &&
467	(device->type != DEV_TYPE_IOC_SPI) )
468	{
469	boot_dev = &boot_info->ext_dev[device_id];
470
471	boot_dev->type = device->type;
472	boot_dev->base = device->base;
473	boot_dev->channels = device->channels;
474	boot_dev->param0 = device->arg0;
475	boot_dev->param1 = device->arg1;
476	boot_dev->param2 = device->arg2;
477	boot_dev->param3 = device->arg3;
478	boot_dev->irqs = device->irqs;
479
480	device_id++;
481
482	#if DEBUG_BOOT_INFO
483	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
484	device_type_str( device->type ) , device->base , device->size ,
485	device->channels , device->irqs );
486	#endif
487	}
488
489	// handle IRQs for PIC
490	if (device->type == DEV_TYPE_PIC_TSR)
491	{
492	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
493	{
494	boot_dev->irq[irq_id].valid = 0;
495	}
496
497	for (irq = &irq_base[device->irq_offset];
498	irq < &irq_base[device->irq_offset + device->irqs];
499	irq++)
500	{
501	boot_dev->irq[irq->port].valid = 1;
502	boot_dev->irq[irq->port].dev_type = irq->dev_type;
503	boot_dev->irq[irq->port].channel = irq->channel;
504	boot_dev->irq[irq->port].is_rx = irq->is_rx;
505
506	#if DEBUG_BOOT_INFO
507	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
508	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
509	#endif
510	}
511	}
512	} // end loop on io_cluster peripherals
513
514	// initialize number of external peripherals
515	boot_info->ext_dev_nr = device_id;
516
517	// Initialize cluster specific resources
518	boot_info->cxy = my_cluster->cxy;
519
520	#if DEBUG_BOOT_INFO
521	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
522	#endif
523
524	////////////////////////////////////////
525	// Initialize array of core descriptors
526	core_id = 0;
527	for (core = &core_base[my_cluster->core_offset];
528	core < &core_base[my_cluster->core_offset + my_cluster->cores];
529	core++ )
530	{
531	boot_info->core[core_id].gid = (gid_t)core->gid;
532	boot_info->core[core_id].lid = (lid_t)core->lid;
533	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
534
535	#if DEBUG_BOOT_INFO
536	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
537	core->gid , core->cxy , core->lid );
538	#endif
539	core_id++;
540	}
541
542	// Initialize number of cores in my_cluster
543	boot_info->cores_nr = core_id;
544
545	//////////////////////////////////////////////////////////////////////
546	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
547
548	#if DEBUG_BOOT_INFO
549	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
550	#endif
551
552	device_id = 0;
553	for (device = &device_base[my_cluster->device_offset];
554	device < &device_base[my_cluster->device_offset + my_cluster->devices];
555	device++ )
556	{
557	// keep only internal devices
558	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
559	(device->type == DEV_TYPE_ICU_XCU) \|\|
560	(device->type == DEV_TYPE_MMC_TSR) \|\|
561	(device->type == DEV_TYPE_DMA_SCL) \|\|
562	(device->type == DEV_TYPE_TXT_MTY) \|\|
563	(device->type == DEV_TYPE_IOC_SPI) )
564	{
565	if (device->type == DEV_TYPE_RAM_SCL) // RAM
566	{
567	// set number of physical memory pages
568	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
569
570	#if DEBUG_BOOT_INFO
571	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
572	#endif
573	}
574	else // ICU / MMC / DMA / MTY
575	{
576	if( device_id >= CONFIG_MAX_INT_DEV )
577	{
578	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
579	__FUNCTION__ , cxy );
580	boot_exit();
581	}
582
583	boot_dev = &boot_info->int_dev[device_id];
584
585	boot_dev->type = device->type;
586	boot_dev->base = device->base;
587	boot_dev->channels = device->channels;
588	boot_dev->param0 = device->arg0;
589	boot_dev->param1 = device->arg1;
590	boot_dev->param2 = device->arg2;
591	boot_dev->param3 = device->arg3;
592	boot_dev->irqs = device->irqs;
593
594	device_id++;
595
596	#if DEBUG_BOOT_INFO
597	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
598	device_type_str( device->type ) , device->base , device->size ,
599	device->channels , device->irqs );
600	#endif
601
602	// handle IRQs for ICU
603	if (device->type == DEV_TYPE_ICU_XCU)
604	{
605	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
606	{
607	boot_dev->irq[irq_id].valid = 0;
608	}
609
610	for (irq = &irq_base[device->irq_offset];
611	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
612	{
613	boot_dev->irq[irq->port].valid = 1;
614	boot_dev->irq[irq->port].dev_type = irq->dev_type;
615	boot_dev->irq[irq->port].channel = irq->channel;
616	boot_dev->irq[irq->port].is_rx = irq->is_rx;
617
618	#if DEBUG_BOOT_INFO
619	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
620	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
621	#endif
622
623	}
624	}
625	}
626	}
627	} // end loop on local peripherals
628
629	// initialize number of internal peripherals
630	boot_info->int_dev_nr = device_id;
631
632	// Get the top address of the kernel segments
633	end = boot_info->kdata_base + boot_info->kdata_size;
634
635	// compute number of physical pages occupied by the kernel code
636	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
637	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
638
639	// no reserved sones for TSAR architecture
640	boot_info->rsvd_nr = 0;
641
642	// set boot_info signature
643	boot_info->signature = BOOT_INFO_SIGNATURE;
644
645	} // boot_info_init()
646
647	/***********************************************************************************
648	* This function check the local boot_info_t structure for a given core.
649	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
650	* @ lid : core local identifier, index the core descriptor table.
651	**********************************************************************************/
652	static void boot_check_core( boot_info_t * boot_info,
653	lid_t lid)
654	{
655	gid_t gid; // global hardware identifier of this core
656	boot_core_t * this; // BOOT_INFO core descriptor of this core.
657
658	// Get core hardware identifier
659	gid = (gid_t)boot_get_procid();
660
661	// get pointer on core descriptor
662	this = &boot_info->core[lid];
663
664	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
665	{
666	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
667	" - boot_info cxy = %x\n"
668	" - boot_info lid = %d\n"
669	" - boot_info gid = %x\n"
670	" - actual gid = %x\n",
671	this->cxy , this->lid , this->gid , gid );
672	boot_exit();
673	}
674
675	} // boot_check_core()
676
677	/*********************************************************************************
678	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
679	* It returns the number of CP0s actually activated.
680	********************************************************************************/
681	static uint32_t boot_wake_all_cp0s( void )
682	{
683	archinfo_header_t* header; // Pointer on ARCHINFO header
684	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
685	archinfo_cluster_t* cluster; // Iterator for loop on clusters
686	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
687	archinfo_device_t* device; // Iterator for loop on devices
688	uint32_t cp0_nb = 0; // CP0s counter
689
690	header = (archinfo_header_t*)ARCHINFO_BASE;
691	cluster_base = archinfo_get_cluster_base(header);
692	device_base = archinfo_get_device_base (header);
693
694	// loop on all clusters
695	for (cluster = cluster_base;
696	cluster < &cluster_base[header->x_size * header->y_size];
697	cluster++)
698	{
699	// Skip boot cluster.
700	if (cluster->cxy == BOOT_CORE_CXY)
701	continue;
702
703	// Skip clusters without core (thus without CP0).
704	if (cluster->cores == 0)
705	continue;
706
707	// Skip clusters without device (thus without XICU).
708	if (cluster->devices == 0)
709	continue;
710
711	// search XICU device associated to CP0, and send a WTI to activate it
712	for (device = &device_base[cluster->device_offset];
713	device < &device_base[cluster->device_offset + cluster->devices];
714	device++)
715	{
716	if (device->type == DEV_TYPE_ICU_XCU)
717	{
718
719	#if DEBUG_BOOT_WAKUP
720	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
721	cluster->cxy , boot_get_proctime );
722	#endif
723
724	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
725	cp0_nb++;
726	}
727	}
728	}
729	return cp0_nb;
730
731	} // boot_wake_cp0()
732
733	/*********************************************************************************
734	* This function is called by all CP0 to activate the other CPi cores.
735	* @ boot_info : pointer to local 'boot_info_t' structure.
736	*********************************************************************************/
737	static void boot_wake_local_cores(boot_info_t * boot_info)
738	{
739	unsigned int core_id;
740
741	// get pointer on XCU device descriptor in boot_info
742	boot_device_t * xcu = &boot_info->int_dev[0];
743
744	// loop on cores
745	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
746	{
747
748	#if DEBUG_BOOT_WAKUP
749	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
750	boot_info->cxy , core_id , boot_get_proctime() );
751	#endif
752	// send an IPI
753	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
754	}
755	} // boot_wake_local_cores()
756
757
758	/*********************************************************************************
759	* This main function of the boot-loader is called by the boot_entry()
760	* function, and executed by all cores.
761	* The arguments values are computed by the boot_entry code.
762	* @ lid : core local identifier,
763	* @ cxy : cluster identifier,
764	*********************************************************************************/
765	void boot_loader( lid_t lid,
766	cxy_t cxy )
767	{
768	boot_info_t * boot_info; // pointer on local boot_info_t structure
769
770	if (lid == 0)
771	{
772	/****************************************************
773	* PHASE A : only CP0 in boot cluster executes it
774	***************************************************/
775	if (cxy == BOOT_CORE_CXY)
776	{
777	boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n",
778	cxy , lid , boot_get_proctime() );
779
780	// Initialize IOC driver
781	if (USE_IOC_BDV) boot_bdv_init();
782	else if (USE_IOC_HBA) boot_hba_init();
783	// else if (USE_IOC_SDC) boot_sdc_init();
784	else if (USE_IOC_SPI) boot_spi_init();
785	else if (!USE_IOC_RDK)
786	{
787	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
788	boot_exit();
789	}
790
791	// Initialize FAT32.
792	boot_fat32_init();
793
794	// Load the 'kernel.elf' file into memory from IOC, and set
795	// the global variables defining the kernel layout
796	boot_kernel_load();
797
798	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
799	cxy , lid , boot_get_proctime() );
800
801	// Load the arch_info.bin file into memory.
802	boot_archinfo_load();
803
804	// Get local boot_info_t structure base address.
805	// It is the first structure in the .kdata segment.
806	boot_info = (boot_info_t *)seg_kdata_base;
807
808	// Initialize local boot_info_t structure.
809	boot_info_init( boot_info , cxy );
810
811	// check boot_info signature
812	if (boot_info->signature != BOOT_INFO_SIGNATURE)
813	{
814	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
815	" illegal boot_info signature / should be %x\n",
816	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
817	boot_exit();
818	}
819
820	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
821	cxy , lid , boot_get_proctime() );
822
823	// Check core information.
824	boot_check_core(boot_info, lid);
825
826	// Activate other CP0s / get number of active CP0s
827	active_cp0s_nr = boot_wake_all_cp0s() + 1;
828
829	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
830	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
831	active_cp0s_nr );
832
833	// activate other local cores
834	boot_wake_local_cores( boot_info );
835
836	// display address extensions
837	// uint32_t cp2_data_ext;
838	// uint32_t cp2_ins_ext;
839	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
840	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
841	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
842	// cxy , lid , cp2_data_ext , cp2_ins_ext );
843
844	// Wait until all local cores in cluster ready
845	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
846	boot_info->cores_nr );
847	}
848	/******************************************************************
849	* PHASE B : all CP0s other than CP0 in boot cluster execute it
850	*****************************************************************/
851	else
852	{
853	// at this point, all INSTRUCTION address extension registers
854	// point on cluster(0,0), but the DATA extension registers point
855	// already on the local cluster to use the local stack.
856	// To access the bootloader global variables we must first copy
857	// the boot code (data and instructions) in the local cluster.
858	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
859	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
860	BOOT_MAX_SIZE );
861
862	// from now, it is safe to refer to the boot code global variables
863	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
864	cxy , lid , boot_get_proctime() );
865
866	// switch to the INSTRUCTION local memory space, to avoid contention.
867	// asm volatile("mtc2 %0, $25" :: "r"(cxy));
868
869	// Copy the arch_info.bin file into the local memory.
870	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
871	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
872	ARCHINFO_MAX_SIZE );
873
874	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
875	cxy , lid , boot_get_proctime() );
876
877	// Copy the kcode segment into local memory
878	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
879	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
880	seg_kcode_size );
881
882	// Copy the kdata segment into local memory
883	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
884	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
885	seg_kdata_size );
886
887	// Copy the kentry segment into local memory
888	boot_remote_memcpy( XPTR( cxy , seg_kentry_base ),
889	XPTR( BOOT_CORE_CXY , seg_kentry_base ),
890	seg_kentry_size );
891
892	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
893	cxy , lid , boot_get_proctime() );
894
895	// Get local boot_info_t structure base address.
896	boot_info = (boot_info_t*)seg_kdata_base;
897
898	// Initialize local boot_info_t structure.
899	boot_info_init( boot_info , cxy );
900
901	// Check core information.
902	boot_check_core( boot_info , lid );
903
904	// get number of active clusters from BOOT_CORE cluster
905	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
906
907	// Wait until all clusters (i.e all CP0s) ready to enter kernel
908	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
909
910	// activate other local cores
911	boot_wake_local_cores( boot_info );
912
913	// display address extensions
914	// uint32_t cp2_data_ext;
915	// uint32_t cp2_ins_ext;
916	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
917	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
918	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
919	// cxy , lid , cp2_data_ext , cp2_ins_ext );
920
921	// Wait until all local cores in cluster ready
922	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
923	boot_info->cores_nr );
924	}
925	}
926	else
927	{
928	/***************************************************************
929	* PHASE C: all non CP0 cores in all clusters execute it
930	**************************************************************/
931
932	// Switch to the INSTRUCTIONS local memory space
933	// to avoid contention at the boot cluster.
934	// asm volatile("mtc2 %0, $25" :: "r"(cxy));
935
936	// Get local boot_info_t structure base address.
937	boot_info = (boot_info_t *)seg_kdata_base;
938
939	// Check core information
940	boot_check_core(boot_info, lid);
941
942	// display address extensions
943	// uint32_t cp2_data_ext;
944	// uint32_t cp2_ins_ext;
945	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
946	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
947	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
948	// cxy , lid , cp2_data_ext , cp2_ins_ext );
949
950	// Wait until all local cores in cluster ready
951	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
952	}
953
954	// Each core initialise the following registers before jumping to kernel:
955	// - sp_29 : stack pointer on idle thread,
956	// - c0_sr : reset BEV bit
957	// - a0_04 : pointer on boot_info structure
958	// - c0_ebase : kentry_base(and jump to kernel_entry.
959
960	// The array of idle-thread descriptors is allocated in the kdata segment,
961	// just after the boot_info structure
962	uint32_t sp;
963	uint32_t base;
964	uint32_t offset = sizeof( boot_info_t );
965	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
966	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
967
968	// compute base address of idle thread descriptors array
969	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
970	else base = seg_kdata_base + offset;
971
972	// compute stack pointer
973	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
974
975	asm volatile( "mfc0 $27, $12 \n"
976	"lui $26, 0xFFBF \n"
977	"ori $26, $26, 0xFFFF \n"
978	"and $27, $27, $26 \n"
979	"mtc0 $27, $12 \n"
980	"move $4, %0 \n"
981	"move $29, %1 \n"
982	"mtc0 %2, $15, 1 \n"
983	"jr %3 \n"
984	:
985	: "r"(boot_info) ,
986	"r"(sp) ,
987	"r"(boot_info->kentry_base) ,
988	"r"(kernel_entry)
989	: "$26" , "$27" , "$29" , "$4" );
990
991
992	} // boot_loader()

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source: trunk/boot/tsar_mips32/boot.c @ 552

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