Context Navigation

source: trunk/tools/bootloader_tsar/boot.c @ 284

Last change on this file since 284 was 279, checked in by alain, 7 years ago
1) Introduce independant command fields for the various devices in the thread descriptor. 2) Introduce a new dev_pic_enable_ipi() function in the generic PIC device 3) Fix two bugs identified by Maxime in the scheduler initialisation, and in the sched_select(). 4) fix several bugs in the TSAR hal_kentry.S. 5) Introduce a third kgiet segment (besides kdata and kcode) in the TSAR bootloader.
File size: 37.8 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 seg_kgiet_base; // kcode segment base address
112	uint32_t seg_kgiet_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(); // boot_loader entry point
119
120	/*********************************************************************************
121	* This function returns the printable string for each device type
122	********************************************************************************/
123	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()
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, kgiet, 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()
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 kgiet_found; // kgiet 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	kgiet_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, kgiet, & kdata:
268	// - the kcode segment is read-only and base < 0x80000000
269	// - the kgiet segment is read-only and base >= 0x8000000
270
271	if( ((program_header[seg_id].p_flags & PF_W) == 0) &&
272	(program_header[seg_id].p_paddr < 0x80000000) ) // 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 >= 0x80000000 ) // kgiet segment
287	{
288	if( kgiet_found )
289	{
290	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
291	" two kgiet segments found\n",
292	__FUNCTION__ , KERNEL_PATHNAME );
293	boot_exit();
294	}
295
296	kgiet_found = true;
297	seg_kgiet_base = seg_paddr;
298	seg_kgiet_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( kgiet_found == false )
325	{
326	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kgiet 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	// set entry point
338	kernel_entry = (uint32_t)elf_header->e_entry;
339
340	#if DEBUG_BOOT_ELF
341	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
342	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
343	#endif
344
345	} // boot_kernel_load()
346
347	/*************************************************************************************
348	* This function initializes the boot_info_t structure for a given cluster.
349	* @ boot_info : pointer to local boot_info_t structure
350	* @ cxy : cluster identifier
351	************************************************************************************/
352	static void boot_info_init( boot_info_t * boot_info,
353	cxy_t cxy )
354	{
355	archinfo_header_t * header;
356	archinfo_core_t * core_base;
357	archinfo_cluster_t * cluster_base;
358	archinfo_device_t * device_base;
359	archinfo_irq_t * irq_base;
360
361	archinfo_cluster_t * cluster;
362	archinfo_cluster_t * my_cluster = NULL; // target cluster
363	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
364
365	archinfo_core_t * core;
366	uint32_t core_id;
367	archinfo_device_t * device;
368	uint32_t device_id;
369	archinfo_irq_t * irq;
370	uint32_t irq_id;
371	uint32_t end;
372	boot_device_t * boot_dev;
373
374	// get pointer on ARCHINFO header and on the four arch_info arrays
375	header = (archinfo_header_t*)ARCHINFO_BASE;
376	core_base = archinfo_get_core_base (header);
377	cluster_base = archinfo_get_cluster_base(header);
378	device_base = archinfo_get_device_base (header);
379	irq_base = archinfo_get_irq_base (header);
380
381	// Initialize global platform parameters
382	boot_info->x_size = header->x_size;
383	boot_info->y_size = header->y_size;
384	boot_info->x_width = header->x_width;
385	boot_info->y_width = header->y_width;
386	boot_info->paddr_width = header->paddr_width;
387	boot_info->io_cxy = header->io_cxy;
388
389	// Initialize kernel segments from global variables
390	boot_info->kernel_code_start = seg_kcode_base;
391	boot_info->kernel_code_end = seg_kcode_base + seg_kcode_size;
392	boot_info->kernel_data_start = seg_kdata_base;
393	boot_info->kernel_data_end = seg_kdata_base + seg_kdata_size;
394
395	// loop on arch_info clusters to get relevant pointers
396	for (cluster = cluster_base;
397	cluster < &cluster_base[header->x_size * header->y_size];
398	cluster++)
399	{
400	if( cluster->cxy == cxy ) my_cluster = cluster;
401	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
402	}
403
404	if( my_cluster == NULL )
405	{
406	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
407	__FUNCTION__ , cxy );
408	boot_exit();
409	}
410
411	if( io_cluster == NULL )
412	{
413	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
414	__FUNCTION__ , header->io_cxy );
415	boot_exit();
416	}
417
418	//////////////////////////////////////////////////////////
419	// initialize the boot_info array of external peripherals
420
421	#if DEBUG_BOOT_INFO
422	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
423	__FUNCTION__ , boot_get_proctime() );
424	#endif
425
426	device_id = 0;
427	for (device = &device_base[io_cluster->device_offset];
428	device < &device_base[io_cluster->device_offset + io_cluster->devices];
429	device++ )
430	{
431	if( device_id >= CONFIG_MAX_EXT_DEV )
432	{
433	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
434	__FUNCTION__ );
435	boot_exit();
436	}
437
438	// keep only external devices
439	if( (device->type != DEV_TYPE_RAM_SCL) &&
440	(device->type != DEV_TYPE_ICU_XCU) &&
441	(device->type != DEV_TYPE_MMC_TSR) &&
442	(device->type != DEV_TYPE_DMA_SCL) )
443	{
444	boot_dev = &boot_info->ext_dev[device_id];
445
446	boot_dev->type = device->type;
447	boot_dev->base = device->base;
448	boot_dev->channels = device->channels;
449	boot_dev->param0 = device->arg0;
450	boot_dev->param1 = device->arg1;
451	boot_dev->param2 = device->arg2;
452	boot_dev->param3 = device->arg3;
453	boot_dev->irqs = device->irqs;
454
455	device_id++;
456
457	#if DEBUG_BOOT_INFO
458	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
459	device_type_str( device->type ) , device->base , device->size ,
460	device->channels , device->irqs );
461	#endif
462	}
463
464	// handle IRQs for PIC
465	if (device->type == DEV_TYPE_PIC_TSR)
466	{
467	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
468	{
469	boot_dev->irq[irq_id].valid = 0;
470	}
471
472	for (irq = &irq_base[device->irq_offset];
473	irq < &irq_base[device->irq_offset + device->irqs];
474	irq++)
475	{
476	boot_dev->irq[irq->port].valid = 1;
477	boot_dev->irq[irq->port].dev_type = irq->dev_type;
478	boot_dev->irq[irq->port].channel = irq->channel;
479	boot_dev->irq[irq->port].is_rx = irq->is_rx;
480
481	#if DEBUG_BOOT_INFO
482	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
483	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
484	#endif
485	}
486	}
487	} // end loop on io_cluster peripherals
488
489	// initialize number of external peripherals
490	boot_info->ext_dev_nr = device_id;
491
492	// Initialize cluster specific resources
493	boot_info->cxy = my_cluster->cxy;
494
495	#if DEBUG_BOOT_INFO
496	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
497	#endif
498
499	////////////////////////////////////////
500	// Initialize array of core descriptors
501	core_id = 0;
502	for (core = &core_base[my_cluster->core_offset];
503	core < &core_base[my_cluster->core_offset + my_cluster->cores];
504	core++ )
505	{
506	boot_info->core[core_id].gid = (gid_t)core->gid;
507	boot_info->core[core_id].lid = (lid_t)core->lid;
508	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
509
510	#if DEBUG_BOOT_INFO
511	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
512	core->gid , core->cxy , core->lid );
513	#endif
514	core_id++;
515	}
516
517	// Initialize number of cores in my_cluster
518	boot_info->cores_nr = core_id;
519
520	//////////////////////////////////////////////////////////////////////
521	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
522
523	#if DEBUG_BOOT_INFO
524	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
525	#endif
526
527	device_id = 0;
528	for (device = &device_base[my_cluster->device_offset];
529	device < &device_base[my_cluster->device_offset + my_cluster->devices];
530	device++ )
531	{
532	// keep only internal devices
533	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
534	(device->type == DEV_TYPE_ICU_XCU) \|\|
535	(device->type == DEV_TYPE_MMC_TSR) \|\|
536	(device->type == DEV_TYPE_DMA_SCL) )
537	{
538	if (device->type == DEV_TYPE_RAM_SCL) // RAM
539	{
540	// set number of physical memory pages
541	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
542
543	#if DEBUG_BOOT_INFO
544	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
545	#endif
546	}
547	else // ICU / MMC / DMA
548	{
549	if( device_id >= CONFIG_MAX_INT_DEV )
550	{
551	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
552	__FUNCTION__ , cxy );
553	boot_exit();
554	}
555
556	boot_dev = &boot_info->int_dev[device_id];
557
558	boot_dev->type = device->type;
559	boot_dev->base = device->base;
560	boot_dev->channels = device->channels;
561	boot_dev->param0 = device->arg0;
562	boot_dev->param1 = device->arg1;
563	boot_dev->param2 = device->arg2;
564	boot_dev->param3 = device->arg3;
565	boot_dev->irqs = device->irqs;
566
567	device_id++;
568
569	#if DEBUG_BOOT_INFO
570	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
571	device_type_str( device->type ) , device->base , device->size ,
572	device->channels , device->irqs );
573	#endif
574
575	// handle IRQs for ICU
576	if (device->type == DEV_TYPE_ICU_XCU)
577	{
578	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
579	{
580	boot_dev->irq[irq_id].valid = 0;
581	}
582
583	for (irq = &irq_base[device->irq_offset];
584	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
585	{
586	boot_dev->irq[irq->port].valid = 1;
587	boot_dev->irq[irq->port].dev_type = irq->dev_type;
588	boot_dev->irq[irq->port].channel = irq->channel;
589	boot_dev->irq[irq->port].is_rx = irq->is_rx;
590
591	#if DEBUG_BOOT_INFO
592	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
593	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
594	#endif
595
596	}
597	}
598	}
599	}
600	} // end loop on local peripherals
601
602	// initialize number of internal peripherals
603	boot_info->int_dev_nr = device_id;
604
605	// Get the top address of the kernel segments
606	end = (boot_info->kernel_code_end > boot_info->kernel_data_end ) ?
607	boot_info->kernel_code_end : boot_info->kernel_data_end;
608
609	// compute number of physical pages occupied by the kernel code
610	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
611	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
612
613	// set one reserved zone for giet code
614	uint32_t first_page = seg_kgiet_base >> CONFIG_PPM_PAGE_SHIFT;
615	uint32_t last_page = (seg_kgiet_base + seg_kgiet_size - 1) >> CONFIG_PPM_PAGE_SHIFT;
616
617	boot_info->rsvd_nr = 1;
618	boot_info->rsvd[0].first_page = first_page;
619	boot_info->rsvd[0].npages = last_page - first_page + 1;
620
621	// set boot_info signature
622	boot_info->signature = BOOT_INFO_SIGNATURE;
623
624	} // boot_info_init()
625
626	/***********************************************************************************
627	* This function check the local boot_info_t structure for a given core.
628	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
629	* @ lid : core local identifier, index the core descriptor table.
630	**********************************************************************************/
631	static void boot_check_core( boot_info_t * boot_info,
632	lid_t lid)
633	{
634	gid_t gid; // global hardware identifier of this core
635	boot_core_t * this; // BOOT_INFO core descriptor of this core.
636
637	// Get core hardware identifier
638	gid = (gid_t)boot_get_procid();
639
640	// get pointer on core descriptor
641	this = &boot_info->core[lid];
642
643	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
644	{
645	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
646	" - boot_info cxy = %x\n"
647	" - boot_info lid = %d\n"
648	" - boot_info gid = %x\n"
649	" - actual gid = %x\n",
650	this->cxy , this->lid , this->gid , gid );
651	boot_exit();
652	}
653
654	} // boot_check_core()
655
656	/*********************************************************************************
657	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
658	* It returns the number of CP0s actually activated.
659	********************************************************************************/
660	static uint32_t boot_wake_all_cp0s()
661	{
662	archinfo_header_t* header; // Pointer on ARCHINFO header
663	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
664	archinfo_cluster_t* cluster; // Iterator for loop on clusters
665	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
666	archinfo_device_t* device; // Iterator for loop on devices
667	uint32_t cp0_nb = 0; // CP0s counter
668
669	header = (archinfo_header_t*)ARCHINFO_BASE;
670	cluster_base = archinfo_get_cluster_base(header);
671	device_base = archinfo_get_device_base (header);
672
673	// loop on all clusters
674	for (cluster = cluster_base;
675	cluster < &cluster_base[header->x_size * header->y_size];
676	cluster++)
677	{
678	// Skip boot cluster.
679	if (cluster->cxy == BOOT_CORE_CXY)
680	continue;
681
682	// Skip clusters without core (thus without CP0).
683	if (cluster->cores == 0)
684	continue;
685
686	// Skip clusters without device (thus without XICU).
687	if (cluster->devices == 0)
688	continue;
689
690	// search XICU device associated to CP0, and send a WTI to activate it
691	for (device = &device_base[cluster->device_offset];
692	device < &device_base[cluster->device_offset + cluster->devices];
693	device++)
694	{
695	if (device->type == DEV_TYPE_ICU_XCU)
696	{
697
698	#if DEBUG_BOOT_WAKUP
699	boot_printf("\n[BOOT] core[%x][0] activated at cycle %d\n",
700	cluster->cxy , boot_get_proctime );
701	#endif
702
703	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
704	cp0_nb++;
705	}
706	}
707	}
708	return cp0_nb;
709
710	} // boot_wake_cp0()
711
712	/*********************************************************************************
713	* This function is called by all CP0 to activate the other CPi cores.
714	* @ boot_info : pointer to local 'boot_info_t' structure.
715	*********************************************************************************/
716	static void boot_wake_local_cores(boot_info_t * boot_info)
717	{
718	unsigned int core_id;
719
720	// get pointer on XCU device descriptor in boot_info
721	boot_device_t * xcu = &boot_info->int_dev[0];
722
723	// loop on cores
724	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
725	{
726
727	#if DEBUG_BOOT_WAKUP
728	boot_printf("\n[BOOT] core[%x][%d] activated at cycle %d\n",
729	boot_info->cxy , core_id , boot_get_proctime() );
730	#endif
731	// send an IPI
732	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
733	}
734	} // boot_wake_local_cores()
735
736
737	/*********************************************************************************
738	* This main function of the boot-loader is called by the boot_entry()
739	* function, and executed by all cores.
740	* The arguments values are computed by the boot_entry code.
741	* @ lid : core local identifier,
742	* @ cxy : cluster identifier,
743	*********************************************************************************/
744	void boot_loader( lid_t lid,
745	cxy_t cxy )
746	{
747	boot_info_t * boot_info; // pointer on local boot_info_t structure
748
749	if (lid == 0)
750	{
751	/****************************************************
752	* PHASE A : only CP0 in boot cluster executes it
753	***************************************************/
754	if (cxy == BOOT_CORE_CXY)
755	{
756	boot_printf("\n[BOOT] core[%x][%d] enters at cycle %d\n",
757	cxy , lid , boot_get_proctime() );
758
759	// Initialize IOC driver
760	if (USE_IOC_BDV) boot_bdv_init();
761	else if (USE_IOC_HBA) boot_hba_init();
762	// else if (USE_IOC_SDC) boot_sdc_init();
763	// else if (USE_IOC_SPI) boot_spi_init();
764	else if (!USE_IOC_RDK)
765	{
766	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
767	boot_exit();
768	}
769
770	// Initialize FAT32.
771	boot_fat32_init();
772
773	// Load the 'kernel.elf' file into memory from IOC, and set
774	// the global variables defining the kernel layout
775	boot_kernel_load();
776
777	boot_printf("\n[BOOT] core[%x][%d] loaded kernel at cycle %d\n",
778	cxy , lid , boot_get_proctime() );
779
780	// Load the arch_info.bin file into memory.
781	boot_archinfo_load();
782
783	// Get local boot_info_t structure base address.
784	// It is the first structure in the .kdata segment.
785	boot_info = (boot_info_t *)seg_kdata_base;
786
787	// Initialize local boot_info_t structure.
788	boot_info_init( boot_info , cxy );
789
790	// check boot_info signature
791	if (boot_info->signature != BOOT_INFO_SIGNATURE)
792	{
793	boot_printf("\n[BOOT ERROR] in %s reported by core[%x][%d]\n"
794	" illegal boot_info signature / should be %x\n",
795	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
796	boot_exit();
797	}
798
799	boot_printf("\n[BOOT] core[%x][%d] loaded boot_info at cycle %d\n",
800	cxy , lid , boot_get_proctime() );
801
802	// Check core information.
803	boot_check_core(boot_info, lid);
804
805	// Activate other CP0s / get number of active CP0s
806	active_cp0s_nr = boot_wake_all_cp0s() + 1;
807
808	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
809	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
810	active_cp0s_nr );
811
812	// activate other local cores
813	boot_wake_local_cores( boot_info );
814
815	// Wait until all local cores in cluster ready
816	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
817	boot_info->cores_nr );
818	}
819	/******************************************************************
820	* PHASE B : all CP0s other than CP0 in boot cluster execute it
821	*****************************************************************/
822	else
823	{
824	// at this point, all INSTRUCTION address extension registers
825	// point on cluster(0,0), but the DATA extension registers point
826	// already on the local cluster to use the local stack.
827	// To access the bootloader global variables we must first copy
828	// the boot code (data and instructions) in the local cluster.
829	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
830	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
831	BOOT_MAX_SIZE );
832
833	// from now, it is safe to refer to the boot code global variables
834	boot_printf("\n[BOOT] core[%x][%d] replicated boot code at cycle %d\n",
835	cxy , lid , boot_get_proctime() );
836
837	// switch to the INSTRUCTION local memory space, to avoid contention.
838	asm volatile("mtc2 %0, $25" :: "r"(cxy));
839
840	// Copy the arch_info.bin file into the local memory.
841	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
842	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
843	ARCHINFO_MAX_SIZE );
844
845	boot_printf("\n[BOOT] core[%x][%d] replicated arch_info at cycle %d\n",
846	cxy , lid , boot_get_proctime() );
847
848	// Copy the kcode segment into local memory
849	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
850	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
851	seg_kcode_size );
852
853	// Copy the kdata segment into local memory
854	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
855	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
856	seg_kdata_size );
857
858	boot_printf("\n[BOOT] core[%x][%d] replicated kernel code at cycle %d\n",
859	cxy , lid , boot_get_proctime() );
860
861	// Get local boot_info_t structure base address.
862	boot_info = (boot_info_t*)seg_kdata_base;
863
864	// Initialize local boot_info_t structure.
865	boot_info_init( boot_info , cxy );
866
867	// Check core information.
868	boot_check_core( boot_info , lid );
869
870	// get number of active clusters from BOOT_CORE cluster
871	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
872
873	// Wait until all clusters (i.e all CP0s) ready to enter kernel
874	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
875
876	// activate other local cores
877	boot_wake_local_cores( boot_info );
878
879	// Wait until all local cores in cluster ready
880	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
881	boot_info->cores_nr );
882	}
883	}
884	else
885	{
886	/***************************************************************
887	* PHASE C: all non CP0 cores in all clusters execute it
888	**************************************************************/
889
890	// Switch to the INSTRUCTIONS local memory space
891	// to avoid contention at the boot cluster.
892	asm volatile("mtc2 %0, $25" :: "r"(cxy));
893
894	// Get local boot_info_t structure base address.
895	boot_info = (boot_info_t *)seg_kdata_base;
896
897	// Check core information
898	boot_check_core(boot_info, lid);
899
900	// Wait until all local cores in cluster ready
901	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
902	}
903
904	// Ech core compute stack pointer to the kernel idle-thread descriptor.
905	// The array of idle-thread descriptors is allocated in the kdata segment,
906	// just after the boot_info structure
907
908	uint32_t sp;
909	uint32_t base;
910	uint32_t offset = sizeof( boot_info_t );
911	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
912	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
913
914	// compute base address of idle thread descriptors array
915	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
916	else base = seg_kdata_base + offset;
917
918	// compute stack pointer
919	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
920
921	// Each cores initialise stack pointer,
922	// reset the BEV bit in status register,
923	// register "boot_info" argument in a0,
924	// and jump to kernel_entry.
925	asm volatile( "mfc0 $27, $12 \n"
926	"lui $26, 0xFFBF \n"
927	"ori $26, $26, 0xFFFF \n"
928	"and $27, $27, $26 \n"
929	"mtc0 $27, $12 \n"
930	"move $4, %0 \n"
931	"move $29, %1 \n"
932	"jr %2 \n"
933	:: "r"(boot_info) , "r"(sp) , "r"(kernel_entry) );
934
935	} // boot_loader()

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

Download in other formats: