Context Navigation

source: trunk/tools/bootloader_tsar/boot.c @ 103

Last change on this file since 103 was 68, checked in by alain, 7 years ago
Fix bug in kernel_init, and reduce size of remote_fifo.
File size: 36.8 KB

Line
1	/*
2	* boot.c - TSAR bootloader implementation.
3	*
4	* Authors : Alain Greiner / Vu Son (2016)
5	*
6	* Copyright (c) UPMC Sorbonne Universites
7	*
8	* This file is part of ALMOS-MKH.
9	*
10	* ALMOS-MKH is free software; you can redistribute it and/or modify it
11	* under the terms of the GNU General Public License as published by
12	* the Free Software Foundation; version 2.0 of the License.
13	*
14	* ALMOS-MKH is distributed in the hope that it will be useful, but
15	* WITHOUT ANY WARRANTY; without even the implied warranty of
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17	* General Public License for more details.
18	*
19	* You should have received a copy of the GNU General Public License
20	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
21	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22	*/
23
24	/****************************************************************************
25	* This file contains the ALMOS-MKH. boot-loader for the TSAR architecture. *
26	* *
27	* It supports clusterised shared memory multi-processor architectures, *
28	* where each processor core is identified by a composite index [cxy,lid] *
29	* with one physical memory bank per cluster. *
30	* *
31	* The 'boot.elf' file (containing the boot-loader binary code) is stored *
32	* on disk and is loaded into memory by core[0,0] (cxy = 0 / lid = 0), *
33	* and is copied in each other cluter by the local CP0 (lid = 0]. *
34	* *
35	* 1) The boot-loader first phase is executed by core[0,0], while *
36	* all other cores are waiting in the preloader. *
37	* It does the following tasks: *
38	* - load into the memory bank of cluster 0 the 'arch_info.bin' *
39	* file (containing the hardware architecture description) and the *
40	* 'kernel.elf' file, at temporary locations, *
41	* - initializes the 'boot_info_t' structure in cluster(0,0) *
42	* (there is 1 'boot_info_t' per cluster), which contains both *
43	* global and cluster specific information that will be used for *
44	* kernel initialisation. *
45	* - activate CP0s in all other clusters, using IPIs. *
46	* - wait completion reports from CP0s on a global barrier. *
47	* *
48	* 2) The boot-loader second phase is then executed in parallel by all *
49	* CP0s (other than core[0,0]). Each CP0 performs the following tasks: *
50	* - copies into the memory bank of the local cluster the 'boot.elf', *
51	* the 'arch_info.bin' (at the same addresses as the 'boot.elf' and *
52	* the 'arch_info.bin' in the memory bank of the cluster(0,0), and *
53	* the kernel image (at address 0x0), *
54	* - initializes the 'boot_info_t' structure of the local cluster, *
55	* - activate all other cores in the same cluster (CPi). *
56	* - wait local CPi completion reports on a local barrier. *
57	* - report completion to bscpu on the global barrier. *
58	* *
59	* 3) The boot-loader third phase is executed in parallel by all cores. *
60	* After passing the global barrier the bscpu: *
61	* - activates the CPi of cluster(0), *
62	* - blocks on the local barrier waiting for all local CPi to report *
63	* completion on the local barrier, *
64	* - moves the local kernel image from the temporary location to the *
65	* address 0x0, (erasing the preloader code). *
66	* *
67	* 4) All cores have finished the boot phase, they jump to the kern_init() *
68	* function (maybe not at the same time). *
69	****************************************************************************/
70
71	#include <elf-types.h>
72	#include <hal_types.h>
73
74	#include <kernel_config.h>
75	#include <boot_config.h>
76
77	#include <arch_info.h>
78	#include <boot_info.h>
79
80	#include <boot_utils.h>
81	#include <boot_fat32.h>
82	#include <boot_bdv_driver.h>
83	#include <boot_hba_driver.h>
84	#include <boot_tty_driver.h>
85
86	/*****************************************************************************
87	* Macros.
88	****************************************************************************/
89
90	#define PAGE_ROUND_DOWN(x) ((x) & (~PPM_PAGE_SIZE -1))
91	#define PAGE_ROUND_UP(x) (((x) + PPM_PAGE_SIZE-1) & \
92	(~(PPM_PAGE_SIZE-1)))
93
94	/*****************************************************************************
95	* Global variables.
96	****************************************************************************/
97
98	// synchronization variables.
99
100	volatile boot_remote_spinlock_t tty0_lock; // protect TTY0 access
101	volatile boot_remote_barrier_t global_barrier; // synchronize CP0 cores
102	volatile boot_remote_barrier_t local_barrier; // synchronize cores in one cluster
103	uint32_t active_cp0s_nr; // number of expected CP0s
104
105	// kernel segments layout variables
106
107	uint32_t seg_kcode_base; // kcode segment base address
108	uint32_t seg_kcode_size; // kcode segment size (bytes)
109	uint32_t seg_kdata_base; // kdata segment base address
110	uint32_t seg_kdata_size; // kdata segment size (bytes)
111	uint32_t kernel_entry; // kernel entry point
112
113	// address used by the WTI to activate remote CP0s
114
115	extern void boot_entry(); // boot_loader entry point
116
117	/*********************************************************************************
118	* This function returns the printable string for each device type
119	********************************************************************************/
120	char * device_type_str( uint32_t dev_type )
121	{
122	if ( dev_type == DEV_TYPE_RAM_SCL ) return "RAM_SCL";
123	else if( dev_type == DEV_TYPE_ROM_SCL ) return "ROM_SCL";
124	else if( dev_type == DEV_TYPE_FBF_SCL ) return "FBF_SCL";
125	else if( dev_type == DEV_TYPE_IOB_TSR ) return "IOB_TSR";
126	else if( dev_type == DEV_TYPE_IOC_BDV ) return "IOC_BDV";
127	else if( dev_type == DEV_TYPE_IOC_HBA ) return "IOC_HBA";
128	else if( dev_type == DEV_TYPE_IOC_SDC ) return "IOC_SDC";
129	else if( dev_type == DEV_TYPE_IOC_SPI ) return "IOC_SPI";
130	else if( dev_type == DEV_TYPE_IOC_RDK ) return "IOC_RDK";
131	else if( dev_type == DEV_TYPE_MMC_TSR ) return "MMC_TSR";
132	else if( dev_type == DEV_TYPE_DMA_SCL ) return "DMA_SCL";
133	else if( dev_type == DEV_TYPE_NIC_CBF ) return "NIC_CBF";
134	else if( dev_type == DEV_TYPE_TIM_SCL ) return "TIM_SCL";
135	else if( dev_type == DEV_TYPE_TXT_TTY ) return "TXT_TTY";
136	else if( dev_type == DEV_TYPE_ICU_XCU ) return "ICU_XCU";
137	else if( dev_type == DEV_TYPE_PIC_TSR ) return "PIC_TSR";
138	else return "undefined";
139	}
140
141	/************************************************************************************
142	* This function loads the arch_info.bin file into the boot cluster memory.
143	***********************************************************************************/
144	static void boot_archinfo_load()
145	{
146	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
147
148	// Load file into memory
149	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
150	{
151	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
152	"<%s> file not found\n",
153	ARCHINFO_PATHNAME);
154	boot_exit();
155	}
156
157	if (header->signature != ARCHINFO_SIGNATURE)
158	{
159	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
160	"<%s> file signature should be %x\n",
161	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
162	boot_exit();
163	}
164
165	#if DEBUG_BOOT_INFO
166	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
167	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
168	#endif
169
170	} // boot_archinfo_load()
171
172	/**************************************************************************************
173	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
174	* analyzes it, and places the the two seg_kcode & seg_kdata segments at their final
175	* physical adresses (just after the preloader zone).
176	* It set the global variables defining the kernel layout.
177	*************************************************************************************/
178	static void boot_kernel_load()
179	{
180	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
181	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
182	uint32_t phdr_offset; // program header offset in kernel.elf file.
183	uint32_t segments_nb; // number of segments in kernel.elf file.
184	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
185	uint32_t seg_paddr; // segment local physical address of segment
186	uint32_t seg_offset; // segment offset in kernel.elf file
187	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
188	uint32_t seg_memsz; // segment size (bytes) in memory image.
189	bool_t kcode_found; // kcode segment found.
190	bool_t kdata_found; // kdata segment found.
191	uint32_t seg_id; // iterator for segments loop.
192
193	#if DEBUG_BOOT_ELF
194	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
195	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
196	#endif
197
198	// Load kernel.elf file into memory buffer
199	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
200	{
201	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
202	KERNEL_PATHNAME);
203	boot_exit();
204	}
205
206	// get pointer to kernel.elf header
207	elf_header = (Elf32_Ehdr*)KERN_BASE;
208
209	// check signature
210	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
211	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
212	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
213	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
214	{
215	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
216	"<%s> is not an ELF file\n",
217	KERNEL_PATHNAME);
218	boot_exit();
219	}
220
221	// Get program header table offset and number of segments
222	phdr_offset = elf_header->e_phoff;
223	segments_nb = elf_header->e_phnum;
224
225	// Get program header table pointer
226	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
227
228	// loop on segments
229	kcode_found = false;
230	kdata_found = false;
231	for (seg_id = 0; seg_id < segments_nb; seg_id++)
232	{
233	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
234	{
235	// Get segment attributes.
236	seg_paddr = program_header[seg_id].p_paddr;
237	seg_offset = program_header[seg_id].p_offset;
238	seg_filesz = program_header[seg_id].p_filesz;
239	seg_memsz = program_header[seg_id].p_memsz;
240
241	// get segment base address in buffer
242	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
243
244	// Load segment to its final physical memory address
245	boot_memcpy( (void*)seg_paddr,
246	(void*)seg_src_addr,
247	seg_filesz );
248
249	#if DEBUG_BOOT_ELF
250	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
251	" base = %x / size = %x\n",
252	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
253	#endif
254
255	// Fill remaining memory with zero if (filesz < memsz).
256	if( seg_memsz < seg_filesz )
257	{
258	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
259	}
260
261	// Note: we suppose that the 'kernel.elf' file contains only 2
262	// loadable segments ktext & kdata and that the main
263	// difference between these two is the WRITE permission: ktext
264	// contains read-only instructions and read_only data,
265	// while kdata contains writable data.
266
267	if ((program_header[seg_id].p_flags & PF_W) == 0) // kcode segment
268	{
269	if( kcode_found )
270	{
271	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
272	" two loadable kcode segments found\n",
273	__FUNCTION__ , KERNEL_PATHNAME );
274	boot_exit();
275	}
276
277	kcode_found = true;
278	seg_kcode_base = seg_paddr;
279	seg_kcode_size = seg_memsz;
280	}
281	else // kdata segment
282	{
283	if( kdata_found )
284	{
285	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
286	" two loadable kdata segments found\n",
287	__FUNCTION__ , KERNEL_PATHNAME );
288	boot_exit();
289	}
290
291	kdata_found = true;
292	seg_kdata_base = seg_paddr;
293	seg_kdata_size = seg_memsz;
294	}
295	}
296	}
297
298	// check kcode & kdata segments found
299	if( kcode_found == false )
300	{
301	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
302	" kcode segment not found\n",
303	__FUNCTION__ , KERNEL_PATHNAME );
304	boot_exit();
305	}
306	if( kdata_found == false )
307	{
308	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
309	" kdata segment not found\n",
310	__FUNCTION__ , KERNEL_PATHNAME );
311	boot_exit();
312	}
313
314	// set entry point
315	kernel_entry = (uint32_t)elf_header->e_entry;
316
317	#if DEBUG_BOOT_ELF
318	boot_printf("\n[BOOT INFO] %s successfully completed for file %s at cycle %d\n",
319	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
320	#endif
321
322	} // boot_kernel_load()
323
324	/*************************************************************************************
325	* This function initializes the boot_info_t structure for a given cluster.
326	* @ boot_info : pointer to local boot_info_t structure
327	* @ cxy : cluster identifier
328	************************************************************************************/
329	static void boot_info_init( boot_info_t * boot_info,
330	cxy_t cxy )
331	{
332	archinfo_header_t * header;
333	archinfo_core_t * core_base;
334	archinfo_cluster_t * cluster_base;
335	archinfo_device_t * device_base;
336	archinfo_irq_t * irq_base;
337
338	archinfo_cluster_t * cluster;
339	archinfo_cluster_t * my_cluster = NULL; // target cluster
340	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
341
342	archinfo_core_t * core;
343	uint32_t core_id;
344	archinfo_device_t * device;
345	uint32_t device_id;
346	archinfo_irq_t * irq;
347	uint32_t irq_id;
348	uint32_t end;
349	uint32_t rsvd_pages;
350	boot_device_t * boot_dev;
351
352	// get pointer on ARCHINFO header and on the four arch_info arrays
353	header = (archinfo_header_t*)ARCHINFO_BASE;
354	core_base = archinfo_get_core_base (header);
355	cluster_base = archinfo_get_cluster_base(header);
356	device_base = archinfo_get_device_base (header);
357	irq_base = archinfo_get_irq_base (header);
358
359	// Initialize global platform parameters
360	boot_info->x_size = header->x_size;
361	boot_info->y_size = header->y_size;
362	boot_info->x_width = header->x_width;
363	boot_info->y_width = header->y_width;
364	boot_info->paddr_width = header->paddr_width;
365	boot_info->io_cxy = header->io_cxy;
366
367	// Initialize kernel segments from global variables
368	boot_info->kernel_code_start = seg_kcode_base;
369	boot_info->kernel_code_end = seg_kcode_base + seg_kcode_size;
370	boot_info->kernel_data_start = seg_kdata_base;
371	boot_info->kernel_data_end = seg_kdata_base + seg_kdata_size;
372
373	// loop on arch_info clusters to get relevant pointers
374	for (cluster = cluster_base;
375	cluster < &cluster_base[header->x_size * header->y_size];
376	cluster++)
377	{
378	if( cluster->cxy == cxy ) my_cluster = cluster;
379	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
380	}
381
382	if( my_cluster == NULL )
383	{
384	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
385	__FUNCTION__ , cxy );
386	boot_exit();
387	}
388
389	if( io_cluster == NULL )
390	{
391	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
392	__FUNCTION__ , header->io_cxy );
393	boot_exit();
394	}
395
396	// loop on arch-info peripherals in io_cluster,
397	// to initialize the boot_info array of external peripherals
398
399	#if DEBUG_BOOT_INFO
400	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
401	__FUNCTION__ , cxy , boot_get_proctime() );
402	#endif
403
404	device_id = 0;
405	for (device = &device_base[io_cluster->device_offset];
406	device < &device_base[io_cluster->device_offset + io_cluster->devices];
407	device++ )
408	{
409	// initialise one entry for each external peripheral
410	if( (device->type != DEV_TYPE_RAM_SCL) &&
411	(device->type != DEV_TYPE_ICU_XCU) &&
412	(device->type != DEV_TYPE_MMC_TSR) &&
413	(device->type != DEV_TYPE_DMA_SCL) )
414	{
415	boot_dev = &boot_info->ext_dev[device_id];
416
417	boot_dev->type = device->type;
418	boot_dev->base = device->base;
419	boot_dev->channels = device->channels;
420	boot_dev->param0 = device->arg0;
421	boot_dev->param1 = device->arg1;
422	boot_dev->param2 = device->arg2;
423	boot_dev->param3 = device->arg3;
424	boot_dev->irqs = device->irqs;
425
426	device_id++;
427
428	#if DEBUG_BOOT_INFO
429	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
430	device_type_str( device->type ) , device->base , device->size ,
431	device->channels , device->irqs );
432	#endif
433	}
434
435	// Initialize array of irq descriptors for PIC
436	if (device->type == DEV_TYPE_PIC_TSR)
437	{
438	for (irq_id = 0; irq_id < CONFIG_MAX_IRQS_PER_PIC; irq_id++)
439	{
440	boot_dev->irq[irq_id].valid = 0;
441	}
442
443	for (irq = &irq_base[device->irq_offset];
444	irq < &irq_base[device->irq_offset + device->irqs];
445	irq++)
446	{
447	boot_dev->irq[irq->port].valid = 1;
448	boot_dev->irq[irq->port].dev_type = irq->dev_type;
449	boot_dev->irq[irq->port].channel = irq->channel;
450	boot_dev->irq[irq->port].is_rx = irq->is_rx;
451
452	#if DEBUG_BOOT_INFO
453	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
454	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
455	#endif
456	}
457	}
458	} // end loop on io_cluster peripherals
459
460	// initialize number of external peripherals
461	boot_info->ext_dev_nr = device_id;
462
463	// Initialize cluster specific resources
464	boot_info->cxy = my_cluster->cxy;
465
466	#if DEBUG_BOOT_INFO
467	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ );
468	#endif
469
470	// Initialize array of core descriptors
471	core_id = 0;
472	for (core = &core_base[my_cluster->core_offset];
473	core < &core_base[my_cluster->core_offset + my_cluster->cores];
474	core++ )
475	{
476	boot_info->core[core_id].gid = (gid_t)core->gid;
477	boot_info->core[core_id].lid = (lid_t)core->lid;
478	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
479
480	#if DEBUG_BOOT_INFO
481	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
482	core->gid , core->cxy , core->lid );
483	#endif
484	core_id++;
485	}
486
487	// Initialize number of cores in my_cluster
488	boot_info->cores_nr = core_id;
489
490	// initialise internal devices (RAM, XCU, MMC, DMA)
491	// set default values, then scan all local devices
492
493	#if DEBUG_BOOT_INFO
494	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ );
495	#endif
496
497	boot_info->pages_nr = 0;
498	boot_info->dev_icu.channels = 0;
499	boot_info->dev_mmc.channels = 0;
500	boot_info->dev_dma.channels = 0;
501
502	for (device = &device_base[my_cluster->device_offset];
503	device < &device_base[my_cluster->device_offset + my_cluster->devices];
504	device++ )
505	{
506	if (device->type == DEV_TYPE_RAM_SCL)
507	{
508	// set number of physical memory pages
509	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
510
511	#if DEBUG_BOOT_INFO
512	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
513	#endif
514	}
515	else if (device->type == DEV_TYPE_ICU_XCU)
516	{
517	boot_dev = &boot_info->dev_icu;
518
519	boot_dev->type = device->type;
520	boot_dev->base = device->base;
521	boot_dev->channels = device->channels;
522	boot_dev->param0 = device->arg0;
523	boot_dev->param1 = device->arg1;
524	boot_dev->param2 = device->arg2;
525	boot_dev->param3 = device->arg3;
526	boot_dev->irqs = device->irqs;
527
528	#if DEBUG_BOOT_INFO
529	boot_printf(" - XCU : base = %l / size = %l / channels = %d / irqs = %d\n",
530	device->base , device->size , device->channels , device->irqs );
531	#endif
532
533	for (irq_id = 0; irq_id < CONFIG_MAX_HWIS_PER_ICU; irq_id++)
534	{
535	boot_dev->irq[irq_id].valid = 0;
536	}
537
538	for (irq = &irq_base[device->irq_offset];
539	irq < &irq_base[device->irq_offset + device->irqs];
540	irq++)
541	{
542	boot_dev->irq[irq->port].valid = 1;
543	boot_dev->irq[irq->port].dev_type = irq->dev_type;
544	boot_dev->irq[irq->port].channel = irq->channel;
545	boot_dev->irq[irq->port].is_rx = irq->is_rx;
546
547	#if DEBUG_BOOT_INFO
548	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
549	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
550	#endif
551
552	}
553	}
554	else if( device->type == DEV_TYPE_MMC_TSR )
555	{
556	boot_dev = &boot_info->dev_mmc;
557
558	boot_dev->type = device->type;
559	boot_dev->base = device->base;
560	boot_dev->channels = device->channels;
561	boot_dev->irqs = 0;
562
563	#if DEBUG_BOOT_INFO
564	boot_printf(" - MMC : base = %l / size = %l / channels = %d / irqs = %d\n",
565	device->base , device->size , device->channels , device->irqs );
566	#endif
567	}
568	else if( device->type == DEV_TYPE_DMA_SCL )
569	{
570	boot_dev = &boot_info->dev_dma;
571
572	boot_dev->type = device->type;
573	boot_dev->base = device->base;
574	boot_dev->channels = device->channels;
575	boot_dev->irqs = 0;
576
577	#if DEBUG_BOOT_INFO
578	boot_printf(" - DMA : base = %l / size = %l / channels = %d / irqs = %d\n",
579	device->base , device->size , device->channels , device->irqs );
580	#endif
581	}
582	} // end loop on local peripherals
583
584	// Get the top address of the kernel segments
585	end = (boot_info->kernel_code_end > boot_info->kernel_data_end ) ?
586	boot_info->kernel_code_end : boot_info->kernel_data_end;
587
588	// Set number of pages occupied by the kernel code
589	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
590	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
591
592	// No "reserved zones" for the TSAR architecture
593	boot_info->rsvd_nr = 0;
594
595	#if DEBUG_BOOT_INFO
596	boot_printf("\n[BOOT INFO] %s : Kernel Reserved Zone / base = 0 / npages = %d at cycle %d\n",
597	__FUNCTION__ , rsvd_pages ,boot_get_proctime() );
598	#endif
599
600	// set boot_info signature
601	boot_info->signature = BOOT_INFO_SIGNATURE;
602
603	} // boot_info_init()
604
605	/***********************************************************************************
606	* This function check the local boot_info_t structure for a given core.
607	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
608	* @ lid : core local identifier, index the core descriptor table.
609	**********************************************************************************/
610	static void boot_check_core( boot_info_t * boot_info,
611	lid_t lid)
612	{
613	gid_t gid; // global hardware identifier of this core
614	boot_core_t * this; // BOOT_INFO core descriptor of this core.
615
616	// Get core hardware identifier
617	gid = (gid_t)boot_get_procid();
618
619	// get pointer on core descriptor
620	this = &boot_info->core[lid];
621
622	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
623	{
624	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
625	" - boot_info cxy = %x\n"
626	" - boot_info lid = %d\n"
627	" - boot_info gid = %x\n"
628	" - actual gid = %x\n",
629	this->cxy , this->lid , this->gid , gid );
630	boot_exit();
631	}
632
633	} // boot_check_core()
634
635	/*********************************************************************************
636	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
637	* It returns the number of CP0s actually activated.
638	********************************************************************************/
639	static uint32_t boot_wake_all_cp0s()
640	{
641	archinfo_header_t* header; // Pointer on ARCHINFO header
642	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
643	archinfo_cluster_t* cluster; // Iterator for loop on clusters
644	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
645	archinfo_device_t* device; // Iterator for loop on devices
646	uint32_t cp0_nb = 0; // CP0s counter
647
648	header = (archinfo_header_t*)ARCHINFO_BASE;
649	cluster_base = archinfo_get_cluster_base(header);
650	device_base = archinfo_get_device_base (header);
651
652	// loop on all clusters
653	for (cluster = cluster_base;
654	cluster < &cluster_base[header->x_size * header->y_size];
655	cluster++)
656	{
657	// Skip boot cluster.
658	if (cluster->cxy == BOOT_CORE_CXY)
659	continue;
660
661	// Skip clusters without core (thus without CP0).
662	if (cluster->cores == 0)
663	continue;
664
665	// Skip clusters without device (thus without XICU).
666	if (cluster->devices == 0)
667	continue;
668
669	// search XICU device associated to CP0, and send a WTI to activate it
670	for (device = &device_base[cluster->device_offset];
671	device < &device_base[cluster->device_offset + cluster->devices];
672	device++)
673	{
674	if (device->type == DEV_TYPE_ICU_XCU)
675	{
676
677	#if DEBUG_BOOT_WAKUP
678	boot_printf("\n[BOOT] core[%x][0] activated at cycle %d\n",
679	cluster->cxy , boot_get_proctime );
680	#endif
681
682	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
683	cp0_nb++;
684	}
685	}
686	}
687	return cp0_nb;
688
689	} // boot_wake_cp0()
690
691	/*********************************************************************************
692	* This function is called by all CP0 to activate all local CPi cores.
693	* @ boot_info : pointer to local 'boot_info_t' structure, used to find
694	* the XICU device associated with local CPi base addresses.
695	*********************************************************************************/
696	static void boot_wake_local_cores(boot_info_t * boot_info)
697	{
698	boot_device_t * device; // Iterator on devices
699	unsigned int core_id; // Iterator on cores
700
701	device = &boot_info->dev_icu;
702
703	// loop on cores
704	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
705	{
706
707	#if DEBUG_BOOT_WAKUP
708	boot_printf("\n[BOOT] core[%x][%d] activated at cycle %d\n",
709	boot_info->cxy , core_id , boot_get_proctime() );
710	#endif
711	boot_remote_sw( (xptr_t)(device->base + (core_id << 2)) , (uint32_t)boot_entry );
712	}
713	} // boot_wake_local_cores()
714
715
716	/*********************************************************************************
717	* This main function of the boot-loader is called by the boot_entry()
718	* function, and executed by all cores.
719	* The arguments values are computed by the boot_entry code.
720	* @ lid : core local identifier,
721	* @ cxy : cluster identifier,
722	*********************************************************************************/
723	void boot_loader( lid_t lid,
724	cxy_t cxy )
725	{
726	boot_info_t * boot_info; // pointer on local boot_info_t structure
727
728	if (lid == 0)
729	{
730	/****************************************************
731	* PHASE A : only CP0 in boot cluster executes it
732	***************************************************/
733	if (cxy == BOOT_CORE_CXY)
734	{
735	boot_printf("\n[BOOT] core[%x][%d] enters at cycle %d\n",
736	cxy , lid , boot_get_proctime() );
737
738	// Initialize IOC driver
739	if (USE_IOC_BDV) boot_bdv_init();
740	else if (USE_IOC_HBA) boot_hba_init();
741	// else if (USE_IOC_SDC) boot_sdc_init();
742	// else if (USE_IOC_SPI) boot_spi_init();
743	else if (!USE_IOC_RDK)
744	{
745	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
746	boot_exit();
747	}
748
749	// Initialize FAT32.
750	boot_fat32_init();
751
752	// Load the 'kernel.elf' file into memory from IOC, and set
753	// the global variables defining the kernel layout
754	boot_kernel_load();
755
756	boot_printf("\n[BOOT] core[%x][%d] loaded kernel at cycle %d\n",
757	cxy , lid , boot_get_proctime() );
758
759	// Load the arch_info.bin file into memory.
760	boot_archinfo_load();
761
762	// Get local boot_info_t structure base address.
763	// It is the first structure in the .kdata segment.
764	boot_info = (boot_info_t *)seg_kdata_base;
765
766	// Initialize local boot_info_t structure.
767	boot_info_init( boot_info , cxy );
768
769	// check boot_info signature
770	if (boot_info->signature != BOOT_INFO_SIGNATURE)
771	{
772	boot_printf("\n[BOOT ERROR] in %s reported by core[%x][%d]\n"
773	" illegal boot_info signature / should be %x\n",
774	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
775	boot_exit();
776	}
777
778	boot_printf("\n[BOOT] core[%x][%d] loaded boot_info at cycle %d\n",
779	cxy , lid , boot_get_proctime() );
780
781	// Check core information.
782	boot_check_core(boot_info, lid);
783
784	// Activate other CP0s / get number of active CP0s
785	active_cp0s_nr = boot_wake_all_cp0s() + 1;
786
787	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
788	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
789	active_cp0s_nr );
790
791	// activate other local cores
792	boot_wake_local_cores( boot_info );
793
794	// Wait until all local cores in cluster ready
795	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
796	boot_info->cores_nr );
797	}
798	/******************************************************************
799	* PHASE B : all CP0s other than CP0 in boot cluster execute it
800	*****************************************************************/
801	else
802	{
803	// at this point, all INSTRUCTION address extension registers
804	// point on cluster(0,0), but the DATA extension registers point
805	// already on the local cluster to use the local stack.
806	// To access the bootloader global variables we must first copy
807	// the boot code (data and instructions) in the local cluster.
808	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
809	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
810	BOOT_MAX_SIZE );
811
812	// from now, it is safe to refer to the boot code global variables
813	boot_printf("\n[BOOT] core[%x][%d] replicated boot code at cycle %d\n",
814	cxy , lid , boot_get_proctime() );
815
816	// switch to the INSTRUCTION local memory space, to avoid contention.
817	asm volatile("mtc2 %0, $25" :: "r"(cxy));
818
819	// Copy the arch_info.bin file into the local memory.
820	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
821	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
822	ARCHINFO_MAX_SIZE );
823
824	boot_printf("\n[BOOT] core[%x][%d] replicated arch_info at cycle %d\n",
825	cxy , lid , boot_get_proctime() );
826
827	// Copy the kcode segment into local memory
828	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
829	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
830	seg_kcode_size );
831
832	// Copy the kdata segment into local memory
833	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
834	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
835	seg_kdata_size );
836
837	boot_printf("\n[BOOT] core[%x][%d] replicated kernel code at cycle %d\n",
838	cxy , lid , boot_get_proctime() );
839
840	// Get local boot_info_t structure base address.
841	boot_info = (boot_info_t*)seg_kdata_base;
842
843	// Initialize local boot_info_t structure.
844	boot_info_init( boot_info , cxy );
845
846	// Check core information.
847	boot_check_core( boot_info , lid );
848
849	// get number of active clusters from BOOT_CORE cluster
850	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
851
852	// Wait until all clusters (i.e all CP0s) ready to enter kernel
853	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
854
855	// activate other local cores
856	boot_wake_local_cores( boot_info );
857
858	// Wait until all local cores in cluster ready
859	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
860	boot_info->cores_nr );
861	}
862	}
863	else
864	{
865	/***************************************************************
866	* PHASE C: all non CP0 cores in all clusters execute it
867	**************************************************************/
868
869	// Switch to the INSTRUCTIONS local memory space
870	// to avoid contention at the boot cluster.
871	asm volatile("mtc2 %0, $25" :: "r"(cxy));
872
873	// Get local boot_info_t structure base address.
874	boot_info = (boot_info_t *)seg_kdata_base;
875
876	// Check core information
877	boot_check_core(boot_info, lid);
878
879	// Wait until all local cores in cluster ready
880	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
881	}
882
883	// Ech core compute stack pointer to the kernel idle-thread descriptor.
884	// The array of idle-thread descriptors is allocated in the kdata segment,
885	// just after the boot_info structure
886
887	uint32_t sp;
888	uint32_t base;
889	uint32_t offset = sizeof( boot_info_t );
890	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
891	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
892
893	// compute base address of idle thread descriptors array
894	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
895	else base = seg_kdata_base + offset;
896
897	// compute stack pointer
898	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
899
900	// Each cores initialise stack pointer,
901	// reset the BEV bit in status register,
902	// register "boot_info" argument in a0,
903	// and jump to kernel_entry.
904	asm volatile( "mfc0 $27, $12 \n"
905	"lui $26, 0xFFBF \n"
906	"ori $26, $26, 0xFFFF \n"
907	"and $27, $27, $26 \n"
908	"mtc0 $27, $12 \n"
909	"move $4, %0 \n"
910	"move $29, %1 \n"
911	"jr %2 \n"
912	:: "r"(boot_info) , "r"(sp) , "r"(kernel_entry) );
913
914	} // boot_loader()

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

Download in other formats: