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boot.c @ 528

Last change on this file since 528 was 527, checked in by viala@…, 6 years ago

Rewrite if-then-else return function into switch case.

For safety reason and performance:

1) Safety: GCC complain with a warning if you forgot an enum variant.
2) code-gen just outperform naive if-then-else.

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

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source: trunk/boot/tsar_mips32/boot.c @ 528

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