Context Navigation

source: trunk/boot/tsar_mips32/boot.c @ 501

Last change on this file since 501 was 499, checked in by viala@…, 6 years ago

[boot] add extern to an externaly used function.

boot.c: At top level:
boot.c:754:6: warning: no previous declaration for

'boot_loader' [-Wmissing-declarations]
void boot_loader( lid_t lid,

File size: 39.5 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	extern void boot_entry( void ); // boot_loader entry point
119
120	/*********************************************************************************
121	* This function returns the printable string for each device type
122	********************************************************************************/
123	static const char * device_type_str( uint32_t dev_type )
124	{
125	if ( dev_type == DEV_TYPE_RAM_SCL ) return "RAM_SCL";
126	else if( dev_type == DEV_TYPE_ROM_SCL ) return "ROM_SCL";
127	else if( dev_type == DEV_TYPE_FBF_SCL ) return "FBF_SCL";
128	else if( dev_type == DEV_TYPE_IOB_TSR ) return "IOB_TSR";
129	else if( dev_type == DEV_TYPE_IOC_BDV ) return "IOC_BDV";
130	else if( dev_type == DEV_TYPE_IOC_HBA ) return "IOC_HBA";
131	else if( dev_type == DEV_TYPE_IOC_SDC ) return "IOC_SDC";
132	else if( dev_type == DEV_TYPE_IOC_SPI ) return "IOC_SPI";
133	else if( dev_type == DEV_TYPE_IOC_RDK ) return "IOC_RDK";
134	else if( dev_type == DEV_TYPE_MMC_TSR ) return "MMC_TSR";
135	else if( dev_type == DEV_TYPE_DMA_SCL ) return "DMA_SCL";
136	else if( dev_type == DEV_TYPE_NIC_CBF ) return "NIC_CBF";
137	else if( dev_type == DEV_TYPE_TIM_SCL ) return "TIM_SCL";
138	else if( dev_type == DEV_TYPE_TXT_TTY ) return "TXT_TTY";
139	else if( dev_type == DEV_TYPE_ICU_XCU ) return "ICU_XCU";
140	else if( dev_type == DEV_TYPE_PIC_TSR ) return "PIC_TSR";
141	else return "undefined";
142	}
143
144	/************************************************************************************
145	* This function loads the arch_info.bin file into the boot cluster memory.
146	***********************************************************************************/
147	static void boot_archinfo_load( void )
148	{
149	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
150
151	// Load file into memory
152	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
153	{
154	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
155	"<%s> file not found\n",
156	ARCHINFO_PATHNAME);
157	boot_exit();
158	}
159
160	if (header->signature != ARCHINFO_SIGNATURE)
161	{
162	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
163	"<%s> file signature should be %x\n",
164	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
165	boot_exit();
166	}
167
168	#if DEBUG_BOOT_INFO
169	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
170	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
171	#endif
172
173	} // boot_archinfo_load()
174
175	/**************************************************************************************
176	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
177	* analyzes it, and places the three kcode, kentry, kdata segments at their final
178	* physical adresses (defined the .elf file).
179	* It set the global variables defining the kernel layout.
180	*************************************************************************************/
181	static void boot_kernel_load( void )
182	{
183	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
184	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
185	uint32_t phdr_offset; // program header offset in kernel.elf file.
186	uint32_t segments_nb; // number of segments in kernel.elf file.
187	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
188	uint32_t seg_paddr; // segment local physical address of segment
189	uint32_t seg_offset; // segment offset in kernel.elf file
190	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
191	uint32_t seg_memsz; // segment size (bytes) in memory image.
192	bool_t kcode_found; // kcode segment found.
193	bool_t kdata_found; // kdata segment found.
194	bool_t kentry_found; // kentry segment found.
195	uint32_t seg_id; // iterator for segments loop.
196
197	#if DEBUG_BOOT_ELF
198	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
199	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
200	#endif
201
202	// Load kernel.elf file into memory buffer
203	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
204	{
205	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
206	KERNEL_PATHNAME);
207	boot_exit();
208	}
209
210	// get pointer to kernel.elf header
211	elf_header = (Elf32_Ehdr*)KERN_BASE;
212
213	// check signature
214	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
215	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
216	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
217	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
218	{
219	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
220	"<%s> is not an ELF file\n",
221	KERNEL_PATHNAME);
222	boot_exit();
223	}
224
225	// Get program header table offset and number of segments
226	phdr_offset = elf_header->e_phoff;
227	segments_nb = elf_header->e_phnum;
228
229	// Get program header table pointer
230	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
231
232	// loop on segments
233	kcode_found = false;
234	kdata_found = false;
235	kentry_found = false;
236	for (seg_id = 0; seg_id < segments_nb; seg_id++)
237	{
238	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
239	{
240	// Get segment attributes.
241	seg_paddr = program_header[seg_id].p_paddr;
242	seg_offset = program_header[seg_id].p_offset;
243	seg_filesz = program_header[seg_id].p_filesz;
244	seg_memsz = program_header[seg_id].p_memsz;
245
246	// get segment base address in buffer
247	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
248
249	// Load segment to its final physical memory address
250	boot_memcpy( (void*)seg_paddr,
251	(void*)seg_src_addr,
252	seg_filesz );
253
254	#if DEBUG_BOOT_ELF
255	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
256	" base = %x / size = %x\n",
257	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
258	#endif
259
260	// Fill remaining memory with zero if (filesz < memsz).
261	if( seg_memsz < seg_filesz )
262	{
263	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
264	}
265
266	// Note: we suppose that the 'kernel.elf' file contains exactly
267	// three loadable segments ktext, kentry, & kdata:
268	// - the kcode segment is read-only and base == KCODE_BASE
269	// - the kentry segment is read-only and base == KENTRY_BASE
270
271	if( ((program_header[seg_id].p_flags & PF_W) == 0) &&
272	(program_header[seg_id].p_paddr == KCODE_BASE) ) // kcode segment
273	{
274	if( kcode_found )
275	{
276	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
277	" two kcode segments found\n",
278	__FUNCTION__ , KERNEL_PATHNAME );
279	boot_exit();
280	}
281
282	kcode_found = true;
283	seg_kcode_base = seg_paddr;
284	seg_kcode_size = seg_memsz;
285	}
286	else if( program_header[seg_id].p_paddr == KENTRY_BASE ) // kentry segment
287	{
288	if( kentry_found )
289	{
290	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
291	" two kentry segments found\n",
292	__FUNCTION__ , KERNEL_PATHNAME );
293	boot_exit();
294	}
295
296	kentry_found = true;
297	seg_kentry_base = seg_paddr;
298	seg_kentry_size = seg_memsz;
299	}
300	else // kdata segment
301	{
302	if( kdata_found )
303	{
304	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
305	" two loadable kdata segments found\n",
306	__FUNCTION__ , KERNEL_PATHNAME );
307	boot_exit();
308	}
309
310	kdata_found = true;
311	seg_kdata_base = seg_paddr;
312	seg_kdata_size = seg_memsz;
313	}
314	}
315	}
316
317	// check kcode & kdata segments found
318	if( kcode_found == false )
319	{
320	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n",
321	__FUNCTION__ , KERNEL_PATHNAME );
322	boot_exit();
323	}
324	if( kentry_found == false )
325	{
326	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry not found\n",
327	__FUNCTION__ , KERNEL_PATHNAME );
328	boot_exit();
329	}
330	if( kdata_found == false )
331	{
332	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n",
333	__FUNCTION__ , KERNEL_PATHNAME );
334	boot_exit();
335	}
336
337	// check segments sizes
338	if( seg_kentry_size > KENTRY_MAX_SIZE )
339	{
340	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry too large\n",
341	__FUNCTION__ , KERNEL_PATHNAME );
342	boot_exit();
343	}
344
345	if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE )
346	{
347	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n",
348	__FUNCTION__ , KERNEL_PATHNAME );
349	}
350
351	// set entry point
352	kernel_entry = (uint32_t)elf_header->e_entry;
353
354	#if DEBUG_BOOT_ELF
355	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
356	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
357	#endif
358
359	} // boot_kernel_load()
360
361	/*************************************************************************************
362	* This function initializes the boot_info_t structure for a given cluster.
363	* @ boot_info : pointer to local boot_info_t structure
364	* @ cxy : cluster identifier
365	************************************************************************************/
366	static void boot_info_init( boot_info_t * boot_info,
367	cxy_t cxy )
368	{
369	archinfo_header_t * header;
370	archinfo_core_t * core_base;
371	archinfo_cluster_t * cluster_base;
372	archinfo_device_t * device_base;
373	archinfo_irq_t * irq_base;
374
375	archinfo_cluster_t * cluster;
376	archinfo_cluster_t * my_cluster = NULL; // target cluster
377	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
378
379	archinfo_core_t * core;
380	uint32_t core_id;
381	archinfo_device_t * device;
382	uint32_t device_id;
383	archinfo_irq_t * irq;
384	uint32_t irq_id;
385	uint32_t end;
386	boot_device_t * boot_dev;
387
388	// get pointer on ARCHINFO header and on the four arch_info arrays
389	header = (archinfo_header_t*)ARCHINFO_BASE;
390	core_base = archinfo_get_core_base (header);
391	cluster_base = archinfo_get_cluster_base(header);
392	device_base = archinfo_get_device_base (header);
393	irq_base = archinfo_get_irq_base (header);
394
395	// Initialize global platform parameters
396	boot_info->x_size = header->x_size;
397	boot_info->y_size = header->y_size;
398	boot_info->x_width = header->x_width;
399	boot_info->y_width = header->y_width;
400	boot_info->paddr_width = header->paddr_width;
401	boot_info->io_cxy = header->io_cxy;
402
403	// Initialize kernel segments from global variables
404	boot_info->kcode_base = seg_kcode_base;
405	boot_info->kcode_size = seg_kcode_size;
406	boot_info->kdata_base = seg_kdata_base;
407	boot_info->kdata_size = seg_kdata_size;
408	boot_info->kentry_base = seg_kentry_base;
409	boot_info->kentry_size = seg_kentry_size;
410
411	// loop on arch_info clusters to get relevant pointers
412	for (cluster = cluster_base;
413	cluster < &cluster_base[header->x_size * header->y_size];
414	cluster++)
415	{
416	if( cluster->cxy == cxy ) my_cluster = cluster;
417	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
418	}
419
420	if( my_cluster == NULL )
421	{
422	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
423	__FUNCTION__ , cxy );
424	boot_exit();
425	}
426
427	if( io_cluster == NULL )
428	{
429	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
430	__FUNCTION__ , header->io_cxy );
431	boot_exit();
432	}
433
434	//////////////////////////////////////////////////////////
435	// initialize the boot_info array of external peripherals
436
437	#if DEBUG_BOOT_INFO
438	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
439	__FUNCTION__ , boot_get_proctime() );
440	#endif
441
442	device_id = 0;
443	for (device = &device_base[io_cluster->device_offset];
444	device < &device_base[io_cluster->device_offset + io_cluster->devices];
445	device++ )
446	{
447	if( device_id >= CONFIG_MAX_EXT_DEV )
448	{
449	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
450	__FUNCTION__ );
451	boot_exit();
452	}
453
454	// keep only external devices
455	if( (device->type != DEV_TYPE_RAM_SCL) &&
456	(device->type != DEV_TYPE_ICU_XCU) &&
457	(device->type != DEV_TYPE_MMC_TSR) &&
458	(device->type != DEV_TYPE_DMA_SCL) )
459	{
460	boot_dev = &boot_info->ext_dev[device_id];
461
462	boot_dev->type = device->type;
463	boot_dev->base = device->base;
464	boot_dev->channels = device->channels;
465	boot_dev->param0 = device->arg0;
466	boot_dev->param1 = device->arg1;
467	boot_dev->param2 = device->arg2;
468	boot_dev->param3 = device->arg3;
469	boot_dev->irqs = device->irqs;
470
471	device_id++;
472
473	#if DEBUG_BOOT_INFO
474	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
475	device_type_str( device->type ) , device->base , device->size ,
476	device->channels , device->irqs );
477	#endif
478	}
479
480	// handle IRQs for PIC
481	if (device->type == DEV_TYPE_PIC_TSR)
482	{
483	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
484	{
485	boot_dev->irq[irq_id].valid = 0;
486	}
487
488	for (irq = &irq_base[device->irq_offset];
489	irq < &irq_base[device->irq_offset + device->irqs];
490	irq++)
491	{
492	boot_dev->irq[irq->port].valid = 1;
493	boot_dev->irq[irq->port].dev_type = irq->dev_type;
494	boot_dev->irq[irq->port].channel = irq->channel;
495	boot_dev->irq[irq->port].is_rx = irq->is_rx;
496
497	#if DEBUG_BOOT_INFO
498	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
499	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
500	#endif
501	}
502	}
503	} // end loop on io_cluster peripherals
504
505	// initialize number of external peripherals
506	boot_info->ext_dev_nr = device_id;
507
508	// Initialize cluster specific resources
509	boot_info->cxy = my_cluster->cxy;
510
511	#if DEBUG_BOOT_INFO
512	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
513	#endif
514
515	////////////////////////////////////////
516	// Initialize array of core descriptors
517	core_id = 0;
518	for (core = &core_base[my_cluster->core_offset];
519	core < &core_base[my_cluster->core_offset + my_cluster->cores];
520	core++ )
521	{
522	boot_info->core[core_id].gid = (gid_t)core->gid;
523	boot_info->core[core_id].lid = (lid_t)core->lid;
524	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
525
526	#if DEBUG_BOOT_INFO
527	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
528	core->gid , core->cxy , core->lid );
529	#endif
530	core_id++;
531	}
532
533	// Initialize number of cores in my_cluster
534	boot_info->cores_nr = core_id;
535
536	//////////////////////////////////////////////////////////////////////
537	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
538
539	#if DEBUG_BOOT_INFO
540	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
541	#endif
542
543	device_id = 0;
544	for (device = &device_base[my_cluster->device_offset];
545	device < &device_base[my_cluster->device_offset + my_cluster->devices];
546	device++ )
547	{
548	// keep only internal devices
549	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
550	(device->type == DEV_TYPE_ICU_XCU) \|\|
551	(device->type == DEV_TYPE_MMC_TSR) \|\|
552	(device->type == DEV_TYPE_DMA_SCL) )
553	{
554	if (device->type == DEV_TYPE_RAM_SCL) // RAM
555	{
556	// set number of physical memory pages
557	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
558
559	#if DEBUG_BOOT_INFO
560	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
561	#endif
562	}
563	else // ICU / MMC / DMA
564	{
565	if( device_id >= CONFIG_MAX_INT_DEV )
566	{
567	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
568	__FUNCTION__ , cxy );
569	boot_exit();
570	}
571
572	boot_dev = &boot_info->int_dev[device_id];
573
574	boot_dev->type = device->type;
575	boot_dev->base = device->base;
576	boot_dev->channels = device->channels;
577	boot_dev->param0 = device->arg0;
578	boot_dev->param1 = device->arg1;
579	boot_dev->param2 = device->arg2;
580	boot_dev->param3 = device->arg3;
581	boot_dev->irqs = device->irqs;
582
583	device_id++;
584
585	#if DEBUG_BOOT_INFO
586	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
587	device_type_str( device->type ) , device->base , device->size ,
588	device->channels , device->irqs );
589	#endif
590
591	// handle IRQs for ICU
592	if (device->type == DEV_TYPE_ICU_XCU)
593	{
594	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
595	{
596	boot_dev->irq[irq_id].valid = 0;
597	}
598
599	for (irq = &irq_base[device->irq_offset];
600	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
601	{
602	boot_dev->irq[irq->port].valid = 1;
603	boot_dev->irq[irq->port].dev_type = irq->dev_type;
604	boot_dev->irq[irq->port].channel = irq->channel;
605	boot_dev->irq[irq->port].is_rx = irq->is_rx;
606
607	#if DEBUG_BOOT_INFO
608	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
609	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
610	#endif
611
612	}
613	}
614	}
615	}
616	} // end loop on local peripherals
617
618	// initialize number of internal peripherals
619	boot_info->int_dev_nr = device_id;
620
621	// Get the top address of the kernel segments
622	end = boot_info->kdata_base + boot_info->kdata_size;
623
624	// compute number of physical pages occupied by the kernel code
625	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
626	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
627
628	// no reserved sones for TSAR architecture
629	boot_info->rsvd_nr = 0;
630
631	// set boot_info signature
632	boot_info->signature = BOOT_INFO_SIGNATURE;
633
634	} // boot_info_init()
635
636	/***********************************************************************************
637	* This function check the local boot_info_t structure for a given core.
638	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
639	* @ lid : core local identifier, index the core descriptor table.
640	**********************************************************************************/
641	static void boot_check_core( boot_info_t * boot_info,
642	lid_t lid)
643	{
644	gid_t gid; // global hardware identifier of this core
645	boot_core_t * this; // BOOT_INFO core descriptor of this core.
646
647	// Get core hardware identifier
648	gid = (gid_t)boot_get_procid();
649
650	// get pointer on core descriptor
651	this = &boot_info->core[lid];
652
653	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
654	{
655	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
656	" - boot_info cxy = %x\n"
657	" - boot_info lid = %d\n"
658	" - boot_info gid = %x\n"
659	" - actual gid = %x\n",
660	this->cxy , this->lid , this->gid , gid );
661	boot_exit();
662	}
663
664	} // boot_check_core()
665
666	/*********************************************************************************
667	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
668	* It returns the number of CP0s actually activated.
669	********************************************************************************/
670	static uint32_t boot_wake_all_cp0s()
671	{
672	archinfo_header_t* header; // Pointer on ARCHINFO header
673	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
674	archinfo_cluster_t* cluster; // Iterator for loop on clusters
675	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
676	archinfo_device_t* device; // Iterator for loop on devices
677	uint32_t cp0_nb = 0; // CP0s counter
678
679	header = (archinfo_header_t*)ARCHINFO_BASE;
680	cluster_base = archinfo_get_cluster_base(header);
681	device_base = archinfo_get_device_base (header);
682
683	// loop on all clusters
684	for (cluster = cluster_base;
685	cluster < &cluster_base[header->x_size * header->y_size];
686	cluster++)
687	{
688	// Skip boot cluster.
689	if (cluster->cxy == BOOT_CORE_CXY)
690	continue;
691
692	// Skip clusters without core (thus without CP0).
693	if (cluster->cores == 0)
694	continue;
695
696	// Skip clusters without device (thus without XICU).
697	if (cluster->devices == 0)
698	continue;
699
700	// search XICU device associated to CP0, and send a WTI to activate it
701	for (device = &device_base[cluster->device_offset];
702	device < &device_base[cluster->device_offset + cluster->devices];
703	device++)
704	{
705	if (device->type == DEV_TYPE_ICU_XCU)
706	{
707
708	#if DEBUG_BOOT_WAKUP
709	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
710	cluster->cxy , boot_get_proctime );
711	#endif
712
713	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
714	cp0_nb++;
715	}
716	}
717	}
718	return cp0_nb;
719
720	} // boot_wake_cp0()
721
722	/*********************************************************************************
723	* This function is called by all CP0 to activate the other CPi cores.
724	* @ boot_info : pointer to local 'boot_info_t' structure.
725	*********************************************************************************/
726	static void boot_wake_local_cores(boot_info_t * boot_info)
727	{
728	unsigned int core_id;
729
730	// get pointer on XCU device descriptor in boot_info
731	boot_device_t * xcu = &boot_info->int_dev[0];
732
733	// loop on cores
734	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
735	{
736
737	#if DEBUG_BOOT_WAKUP
738	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
739	boot_info->cxy , core_id , boot_get_proctime() );
740	#endif
741	// send an IPI
742	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
743	}
744	} // boot_wake_local_cores()
745
746
747	/*********************************************************************************
748	* This main function of the boot-loader is called by the boot_entry()
749	* function, and executed by all cores.
750	* The arguments values are computed by the boot_entry code.
751	* @ lid : core local identifier,
752	* @ cxy : cluster identifier,
753	*********************************************************************************/
754	extern void boot_loader( lid_t lid,
755	cxy_t cxy )
756	{
757	boot_info_t * boot_info; // pointer on local boot_info_t structure
758
759	if (lid == 0)
760	{
761	/****************************************************
762	* PHASE A : only CP0 in boot cluster executes it
763	***************************************************/
764	if (cxy == BOOT_CORE_CXY)
765	{
766	boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n",
767	cxy , lid , boot_get_proctime() );
768
769	// Initialize IOC driver
770	if (USE_IOC_BDV) boot_bdv_init();
771	else if (USE_IOC_HBA) boot_hba_init();
772	// else if (USE_IOC_SDC) boot_sdc_init();
773	// else if (USE_IOC_SPI) boot_spi_init();
774	else if (!USE_IOC_RDK)
775	{
776	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
777	boot_exit();
778	}
779
780	// Initialize FAT32.
781	boot_fat32_init();
782
783	// Load the 'kernel.elf' file into memory from IOC, and set
784	// the global variables defining the kernel layout
785	boot_kernel_load();
786
787	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
788	cxy , lid , boot_get_proctime() );
789
790	// Load the arch_info.bin file into memory.
791	boot_archinfo_load();
792
793	// Get local boot_info_t structure base address.
794	// It is the first structure in the .kdata segment.
795	boot_info = (boot_info_t *)seg_kdata_base;
796
797	// Initialize local boot_info_t structure.
798	boot_info_init( boot_info , cxy );
799
800	// check boot_info signature
801	if (boot_info->signature != BOOT_INFO_SIGNATURE)
802	{
803	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
804	" illegal boot_info signature / should be %x\n",
805	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
806	boot_exit();
807	}
808
809	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
810	cxy , lid , boot_get_proctime() );
811
812	// Check core information.
813	boot_check_core(boot_info, lid);
814
815	// Activate other CP0s / get number of active CP0s
816	active_cp0s_nr = boot_wake_all_cp0s() + 1;
817
818	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
819	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
820	active_cp0s_nr );
821
822	// activate other local cores
823	boot_wake_local_cores( boot_info );
824
825	// display address extensions
826	// uint32_t cp2_data_ext;
827	// uint32_t cp2_ins_ext;
828	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
829	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
830	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
831	// cxy , lid , cp2_data_ext , cp2_ins_ext );
832
833	// Wait until all local cores in cluster ready
834	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
835	boot_info->cores_nr );
836	}
837	/******************************************************************
838	* PHASE B : all CP0s other than CP0 in boot cluster execute it
839	*****************************************************************/
840	else
841	{
842	// at this point, all INSTRUCTION address extension registers
843	// point on cluster(0,0), but the DATA extension registers point
844	// already on the local cluster to use the local stack.
845	// To access the bootloader global variables we must first copy
846	// the boot code (data and instructions) in the local cluster.
847	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
848	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
849	BOOT_MAX_SIZE );
850
851	// from now, it is safe to refer to the boot code global variables
852	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
853	cxy , lid , boot_get_proctime() );
854
855	// switch to the INSTRUCTION local memory space, to avoid contention.
856	asm volatile("mtc2 %0, $25" :: "r"(cxy));
857
858	// Copy the arch_info.bin file into the local memory.
859	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
860	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
861	ARCHINFO_MAX_SIZE );
862
863	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
864	cxy , lid , boot_get_proctime() );
865
866	// Copy the kcode segment into local memory
867	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
868	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
869	seg_kcode_size );
870
871	// Copy the kdata segment into local memory
872	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
873	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
874	seg_kdata_size );
875
876	// Copy the kentry segment into local memory
877	boot_remote_memcpy( XPTR( cxy , seg_kentry_base ),
878	XPTR( BOOT_CORE_CXY , seg_kentry_base ),
879	seg_kentry_size );
880
881	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
882	cxy , lid , boot_get_proctime() );
883
884	// Get local boot_info_t structure base address.
885	boot_info = (boot_info_t*)seg_kdata_base;
886
887	// Initialize local boot_info_t structure.
888	boot_info_init( boot_info , cxy );
889
890	// Check core information.
891	boot_check_core( boot_info , lid );
892
893	// get number of active clusters from BOOT_CORE cluster
894	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
895
896	// Wait until all clusters (i.e all CP0s) ready to enter kernel
897	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
898
899	// activate other local cores
900	boot_wake_local_cores( boot_info );
901
902	// display address extensions
903	// uint32_t cp2_data_ext;
904	// uint32_t cp2_ins_ext;
905	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
906	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
907	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
908	// cxy , lid , cp2_data_ext , cp2_ins_ext );
909
910	// Wait until all local cores in cluster ready
911	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
912	boot_info->cores_nr );
913	}
914	}
915	else
916	{
917	/***************************************************************
918	* PHASE C: all non CP0 cores in all clusters execute it
919	**************************************************************/
920
921	// Switch to the INSTRUCTIONS local memory space
922	// to avoid contention at the boot cluster.
923	asm volatile("mtc2 %0, $25" :: "r"(cxy));
924
925	// Get local boot_info_t structure base address.
926	boot_info = (boot_info_t *)seg_kdata_base;
927
928	// Check core information
929	boot_check_core(boot_info, lid);
930
931	// display address extensions
932	// uint32_t cp2_data_ext;
933	// uint32_t cp2_ins_ext;
934	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
935	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
936	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
937	// cxy , lid , cp2_data_ext , cp2_ins_ext );
938
939	// Wait until all local cores in cluster ready
940	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
941	}
942
943	// Each core initialise the following registers before jumping to kernel:
944	// - sp_29 : stack pointer on idle thread,
945	// - c0_sr : reset BEV bit
946	// - a0_04 : pointer on boot_info structure
947	// - c0_ebase : kentry_base(and jump to kernel_entry.
948
949	// The array of idle-thread descriptors is allocated in the kdata segment,
950	// just after the boot_info structure
951	uint32_t sp;
952	uint32_t base;
953	uint32_t offset = sizeof( boot_info_t );
954	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
955	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
956
957	// compute base address of idle thread descriptors array
958	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
959	else base = seg_kdata_base + offset;
960
961	// compute stack pointer
962	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
963
964	asm volatile( "mfc0 $27, $12 \n"
965	"lui $26, 0xFFBF \n"
966	"ori $26, $26, 0xFFFF \n"
967	"and $27, $27, $26 \n"
968	"mtc0 $27, $12 \n"
969	"move $4, %0 \n"
970	"move $29, %1 \n"
971	"mtc0 %2, $15, 1 \n"
972	"jr %3 \n"
973	:
974	: "r"(boot_info) ,
975	"r"(sp) ,
976	"r"(boot_info->kentry_base) ,
977	"r"(kernel_entry)
978	: "$26" , "$27" , "$29" , "$4" );
979
980
981	} // boot_loader()

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

Download in other formats: