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source: trunk/boot/tsar_mips32/boot.c @ 557

Last change on this file since 557 was 557, checked in by nicolas.van.phan@…, 6 years ago
Add cluster_info[][] array in cluster descriptor
File size: 40.3 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 <cluster_info.h>
81
82	#include <boot_utils.h>
83	#include <boot_fat32.h>
84	#include <boot_bdv_driver.h>
85	#include <boot_hba_driver.h>
86	#include <boot_spi_driver.h>
87	#include <boot_tty_driver.h>
88
89	/*****************************************************************************
90	* Macros.
91	****************************************************************************/
92
93	#define PAGE_ROUND_DOWN(x) ((x) & (~PPM_PAGE_SIZE -1))
94	#define PAGE_ROUND_UP(x) (((x) + PPM_PAGE_SIZE-1) & \
95	(~(PPM_PAGE_SIZE-1)))
96
97	/*****************************************************************************
98	* Global variables.
99	****************************************************************************/
100
101	// synchronization variables.
102
103	volatile boot_remote_spinlock_t tty0_lock; // protect TTY0 access
104	volatile boot_remote_barrier_t global_barrier; // synchronize CP0 cores
105	volatile boot_remote_barrier_t local_barrier; // synchronize cores in one cluster
106	uint32_t active_cp0s_nr; // number of expected CP0s
107
108	// kernel segments layout variables
109
110	uint32_t seg_kcode_base; // kcode segment base address
111	uint32_t seg_kcode_size; // kcode segment size (bytes)
112	uint32_t seg_kdata_base; // kdata segment base address
113	uint32_t seg_kdata_size; // kdata segment size (bytes)
114	uint32_t seg_kentry_base; // kcode segment base address
115	uint32_t seg_kentry_size; // kcode segment size (bytes)
116
117	uint32_t kernel_entry; // kernel entry point
118
119	// address used by the WTI to activate remote CP0s
120
121	// Functions called by boot_entry.S must be externs.
122	extern void boot_entry( void ); // boot_loader entry point
123	extern void boot_loader( lid_t lid, cxy_t cxy );
124
125	/*********************************************************************************
126	* This function returns the printable string for each device type
127	********************************************************************************/
128	static const char * device_type_str( boot_device_types_t dev_type ) {
129	switch (dev_type) {
130	case DEV_TYPE_RAM_SCL: return "RAM_SCL";
131	case DEV_TYPE_ROM_SCL: return "ROM_SCL";
132	case DEV_TYPE_FBF_SCL: return "FBF_SCL";
133	case DEV_TYPE_IOB_TSR: return "IOB_TSR";
134	case DEV_TYPE_IOC_BDV: return "IOC_BDV";
135	case DEV_TYPE_IOC_HBA: return "IOC_HBA";
136	case DEV_TYPE_IOC_SDC: return "IOC_SDC";
137	case DEV_TYPE_IOC_SPI: return "IOC_SPI";
138	case DEV_TYPE_IOC_RDK: return "IOC_RDK";
139	case DEV_TYPE_MMC_TSR: return "MMC_TSR";
140	case DEV_TYPE_DMA_SCL: return "DMA_SCL";
141	case DEV_TYPE_NIC_CBF: return "NIC_CBF";
142	case DEV_TYPE_TIM_SCL: return "TIM_SCL";
143	case DEV_TYPE_TXT_TTY: return "TXT_TTY";
144	case DEV_TYPE_TXT_MTY: return "TXT_MTY";
145	case DEV_TYPE_ICU_XCU: return "ICU_XCU";
146	case DEV_TYPE_PIC_TSR: return "PIC_TSR";
147	default: return "undefined";
148	}
149	}
150
151	/************************************************************************************
152	* This function loads the arch_info.bin file into the boot cluster memory.
153	***********************************************************************************/
154	static void boot_archinfo_load( void )
155	{
156	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
157
158	// Load file into memory
159	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
160	{
161	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
162	"<%s> file not found\n",
163	ARCHINFO_PATHNAME);
164	boot_exit();
165	}
166
167	if (header->signature != ARCHINFO_SIGNATURE)
168	{
169	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
170	"<%s> file signature should be %x\n",
171	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
172	boot_exit();
173	}
174
175	#if DEBUG_BOOT_INFO
176	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
177	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
178	#endif
179
180	} // boot_archinfo_load()
181
182	/**************************************************************************************
183	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
184	* analyzes it, and places the three kcode, kentry, kdata segments at their final
185	* physical adresses (defined the .elf file).
186	* It set the global variables defining the kernel layout.
187	*************************************************************************************/
188	static void boot_kernel_load( void )
189	{
190	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
191	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
192	uint32_t phdr_offset; // program header offset in kernel.elf file.
193	uint32_t segments_nb; // number of segments in kernel.elf file.
194	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
195	uint32_t seg_paddr; // segment local physical address of segment
196	uint32_t seg_offset; // segment offset in kernel.elf file
197	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
198	uint32_t seg_memsz; // segment size (bytes) in memory image.
199	bool_t kcode_found; // kcode segment found.
200	bool_t kdata_found; // kdata segment found.
201	bool_t kentry_found; // kentry segment found.
202	uint32_t seg_id; // iterator for segments loop.
203
204	#if DEBUG_BOOT_ELF
205	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
206	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
207	#endif
208
209	// Load kernel.elf file into memory buffer
210	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
211	{
212	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
213	KERNEL_PATHNAME);
214	boot_exit();
215	}
216
217	// get pointer to kernel.elf header
218	elf_header = (Elf32_Ehdr*)KERN_BASE;
219
220	// check signature
221	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
222	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
223	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
224	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
225	{
226	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
227	"<%s> is not an ELF file\n",
228	KERNEL_PATHNAME);
229	boot_exit();
230	}
231
232	// Get program header table offset and number of segments
233	phdr_offset = elf_header->e_phoff;
234	segments_nb = elf_header->e_phnum;
235
236	// Get program header table pointer
237	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
238
239	// loop on segments
240	kcode_found = false;
241	kdata_found = false;
242	kentry_found = false;
243	for (seg_id = 0; seg_id < segments_nb; seg_id++)
244	{
245	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
246	{
247	// Get segment attributes.
248	seg_paddr = program_header[seg_id].p_paddr;
249	seg_offset = program_header[seg_id].p_offset;
250	seg_filesz = program_header[seg_id].p_filesz;
251	seg_memsz = program_header[seg_id].p_memsz;
252
253	// get segment base address in buffer
254	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
255
256	// Load segment to its final physical memory address
257	boot_memcpy( (void*)seg_paddr,
258	(void*)seg_src_addr,
259	seg_filesz );
260
261	#if DEBUG_BOOT_ELF
262	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
263	" base = %x / size = %x\n",
264	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
265	#endif
266
267	// Fill remaining memory with zero if (filesz < memsz).
268	if( seg_memsz < seg_filesz )
269	{
270	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
271	}
272
273	// Note: we suppose that the 'kernel.elf' file contains exactly
274	// three loadable segments ktext, kentry, & kdata:
275	// - the kcode segment is read-only and base == KCODE_BASE
276	// - the kentry segment is read-only and base == KENTRY_BASE
277
278	if( ((program_header[seg_id].p_flags & PF_W) == 0) &&
279	(program_header[seg_id].p_paddr == KCODE_BASE) ) // kcode segment
280	{
281	if( kcode_found )
282	{
283	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
284	" two kcode segments found\n",
285	__FUNCTION__ , KERNEL_PATHNAME );
286	boot_exit();
287	}
288
289	kcode_found = true;
290	seg_kcode_base = seg_paddr;
291	seg_kcode_size = seg_memsz;
292	}
293	else if( program_header[seg_id].p_paddr == KENTRY_BASE ) // kentry segment
294	{
295	if( kentry_found )
296	{
297	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
298	" two kentry segments found\n",
299	__FUNCTION__ , KERNEL_PATHNAME );
300	boot_exit();
301	}
302
303	kentry_found = true;
304	seg_kentry_base = seg_paddr;
305	seg_kentry_size = seg_memsz;
306	}
307	else // kdata segment
308	{
309	if( kdata_found )
310	{
311	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
312	" two loadable kdata segments found\n",
313	__FUNCTION__ , KERNEL_PATHNAME );
314	boot_exit();
315	}
316
317	kdata_found = true;
318	seg_kdata_base = seg_paddr;
319	seg_kdata_size = seg_memsz;
320	}
321	}
322	}
323
324	// check kcode & kdata segments found
325	if( kcode_found == false )
326	{
327	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n",
328	__FUNCTION__ , KERNEL_PATHNAME );
329	boot_exit();
330	}
331	if( kentry_found == false )
332	{
333	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry not found\n",
334	__FUNCTION__ , KERNEL_PATHNAME );
335	boot_exit();
336	}
337	if( kdata_found == false )
338	{
339	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n",
340	__FUNCTION__ , KERNEL_PATHNAME );
341	boot_exit();
342	}
343
344	// check segments sizes
345	if( seg_kentry_size > KENTRY_MAX_SIZE )
346	{
347	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry too large\n",
348	__FUNCTION__ , KERNEL_PATHNAME );
349	boot_exit();
350	}
351
352	if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE )
353	{
354	boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n",
355	__FUNCTION__ , KERNEL_PATHNAME );
356	}
357
358	// set entry point
359	kernel_entry = (uint32_t)elf_header->e_entry;
360
361	#if DEBUG_BOOT_ELF
362	boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n",
363	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
364	#endif
365
366	} // boot_kernel_load()
367
368	/*************************************************************************************
369	* This function initializes the boot_info_t structure for a given cluster.
370	* @ boot_info : pointer to local boot_info_t structure
371	* @ cxy : cluster identifier
372	************************************************************************************/
373	static void boot_info_init( boot_info_t * boot_info,
374	cxy_t cxy )
375	{
376	archinfo_header_t * header;
377	archinfo_core_t * core_base;
378	archinfo_cluster_t * cluster_base;
379	archinfo_device_t * device_base;
380	archinfo_irq_t * irq_base;
381
382	archinfo_cluster_t * cluster;
383	archinfo_cluster_t * my_cluster = NULL; // target cluster
384	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
385
386	archinfo_core_t * core;
387	uint32_t core_id;
388	archinfo_device_t * device;
389	uint32_t device_id;
390	archinfo_irq_t * irq;
391	uint32_t irq_id;
392	uint32_t end;
393	boot_device_t * boot_dev;
394
395	// get pointer on ARCHINFO header and on the four arch_info arrays
396	header = (archinfo_header_t*)ARCHINFO_BASE;
397	core_base = archinfo_get_core_base (header);
398	cluster_base = archinfo_get_cluster_base(header);
399	device_base = archinfo_get_device_base (header);
400	irq_base = archinfo_get_irq_base (header);
401
402	// Initialize global platform parameters
403	boot_info->x_size = header->x_size;
404	boot_info->y_size = header->y_size;
405	boot_info->x_width = header->x_width;
406	boot_info->y_width = header->y_width;
407	boot_info->x_max = header->x_size; // [FIXME]
408	boot_info->y_max = header->name[5] == 'l' ? header->y_size - 1 : header->y_size; // [FIXME]
409	boot_info->paddr_width = header->paddr_width;
410	boot_info->io_cxy = header->io_cxy;
411
412	// Initialize kernel segments from global variables
413	boot_info->kcode_base = seg_kcode_base;
414	boot_info->kcode_size = seg_kcode_size;
415	boot_info->kdata_base = seg_kdata_base;
416	boot_info->kdata_size = seg_kdata_size;
417	boot_info->kentry_base = seg_kentry_base;
418	boot_info->kentry_size = seg_kentry_size;
419
420	/* Initialize all clusters as empty for now */
421	int x, y;
422	for ( x = 0; x < CONFIG_MAX_CLUSTERS_X; x++)
423	{
424	for ( x = 0; x < CONFIG_MAX_CLUSTERS_X; x++)
425	{
426	boot_info->cluster_info[x][y] = 0x0;
427	}
428	}
429
430	// loop on arch_info clusters to get relevant pointers
431	for (cluster = cluster_base;
432	cluster < &cluster_base[header->x_size * header->y_size];
433	cluster++)
434	{
435	int x = cluster->cxy >> Y_WIDTH;
436	int y = cluster->cxy & ((1 << Y_WIDTH) - 1);
437
438	if( cluster->cxy == cxy ) my_cluster = cluster;
439	if( cluster->cxy == header->io_cxy ) {
440	io_cluster = cluster;
441	boot_info->cluster_info[x][y] \|= CINFO_IS_IO;
442	}
443	if ( cluster->cores > 0 ) {
444	boot_info->cluster_info[x][y] \|= CINFO_ACTIVE;
445	}
446	}
447
448	if( my_cluster == NULL )
449	{
450	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
451	__FUNCTION__ , cxy );
452	boot_exit();
453	}
454
455	if( io_cluster == NULL )
456	{
457	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
458	__FUNCTION__ , header->io_cxy );
459	boot_exit();
460	}
461
462	//////////////////////////////////////////////////////////
463	// initialize the boot_info array of external peripherals
464
465	#if DEBUG_BOOT_INFO
466	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
467	__FUNCTION__ , boot_get_proctime() );
468	#endif
469
470	device_id = 0;
471	for (device = &device_base[io_cluster->device_offset];
472	device < &device_base[io_cluster->device_offset + io_cluster->devices];
473	device++ )
474	{
475	if( device_id >= CONFIG_MAX_EXT_DEV )
476	{
477	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
478	__FUNCTION__ );
479	boot_exit();
480	}
481
482	// keep only external devices
483	if( (device->type != DEV_TYPE_RAM_SCL) &&
484	(device->type != DEV_TYPE_ICU_XCU) &&
485	(device->type != DEV_TYPE_MMC_TSR) &&
486	(device->type != DEV_TYPE_DMA_SCL) &&
487	(device->type != DEV_TYPE_TXT_MTY) &&
488	(device->type != DEV_TYPE_IOC_SPI) )
489	{
490	boot_dev = &boot_info->ext_dev[device_id];
491
492	boot_dev->type = device->type;
493	boot_dev->base = device->base;
494	boot_dev->channels = device->channels;
495	boot_dev->param0 = device->arg0;
496	boot_dev->param1 = device->arg1;
497	boot_dev->param2 = device->arg2;
498	boot_dev->param3 = device->arg3;
499	boot_dev->irqs = device->irqs;
500
501	device_id++;
502
503	#if DEBUG_BOOT_INFO
504	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
505	device_type_str( device->type ) , device->base , device->size ,
506	device->channels , device->irqs );
507	#endif
508	}
509
510	// handle IRQs for PIC
511	if (device->type == DEV_TYPE_PIC_TSR)
512	{
513	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
514	{
515	boot_dev->irq[irq_id].valid = 0;
516	}
517
518	for (irq = &irq_base[device->irq_offset];
519	irq < &irq_base[device->irq_offset + device->irqs];
520	irq++)
521	{
522	boot_dev->irq[irq->port].valid = 1;
523	boot_dev->irq[irq->port].dev_type = irq->dev_type;
524	boot_dev->irq[irq->port].channel = irq->channel;
525	boot_dev->irq[irq->port].is_rx = irq->is_rx;
526
527	#if DEBUG_BOOT_INFO
528	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
529	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
530	#endif
531	}
532	}
533	} // end loop on io_cluster peripherals
534
535	// initialize number of external peripherals
536	boot_info->ext_dev_nr = device_id;
537
538	// Initialize cluster specific resources
539	boot_info->cxy = my_cluster->cxy;
540
541	#if DEBUG_BOOT_INFO
542	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
543	#endif
544
545	////////////////////////////////////////
546	// Initialize array of core descriptors
547	core_id = 0;
548	for (core = &core_base[my_cluster->core_offset];
549	core < &core_base[my_cluster->core_offset + my_cluster->cores];
550	core++ )
551	{
552	boot_info->core[core_id].gid = (gid_t)core->gid;
553	boot_info->core[core_id].lid = (lid_t)core->lid;
554	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
555
556	#if DEBUG_BOOT_INFO
557	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
558	core->gid , core->cxy , core->lid );
559	#endif
560	core_id++;
561	}
562
563	// Initialize number of cores in my_cluster
564	boot_info->cores_nr = core_id;
565
566	//////////////////////////////////////////////////////////////////////
567	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
568
569	#if DEBUG_BOOT_INFO
570	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
571	#endif
572
573	device_id = 0;
574	for (device = &device_base[my_cluster->device_offset];
575	device < &device_base[my_cluster->device_offset + my_cluster->devices];
576	device++ )
577	{
578	// keep only internal devices
579	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
580	(device->type == DEV_TYPE_ICU_XCU) \|\|
581	(device->type == DEV_TYPE_MMC_TSR) \|\|
582	(device->type == DEV_TYPE_DMA_SCL) \|\|
583	(device->type == DEV_TYPE_TXT_MTY) \|\|
584	(device->type == DEV_TYPE_IOC_SPI) )
585	{
586	if (device->type == DEV_TYPE_RAM_SCL) // RAM
587	{
588	// set number of physical memory pages
589	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
590
591	#if DEBUG_BOOT_INFO
592	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
593	#endif
594	}
595	else // ICU / MMC / DMA / MTY
596	{
597	if( device_id >= CONFIG_MAX_INT_DEV )
598	{
599	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
600	__FUNCTION__ , cxy );
601	boot_exit();
602	}
603
604	boot_dev = &boot_info->int_dev[device_id];
605
606	boot_dev->type = device->type;
607	boot_dev->base = device->base;
608	boot_dev->channels = device->channels;
609	boot_dev->param0 = device->arg0;
610	boot_dev->param1 = device->arg1;
611	boot_dev->param2 = device->arg2;
612	boot_dev->param3 = device->arg3;
613	boot_dev->irqs = device->irqs;
614
615	device_id++;
616
617	#if DEBUG_BOOT_INFO
618	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
619	device_type_str( device->type ) , device->base , device->size ,
620	device->channels , device->irqs );
621	#endif
622
623	// handle IRQs for ICU
624	if (device->type == DEV_TYPE_ICU_XCU)
625	{
626	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
627	{
628	boot_dev->irq[irq_id].valid = 0;
629	}
630
631	for (irq = &irq_base[device->irq_offset];
632	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
633	{
634	boot_dev->irq[irq->port].valid = 1;
635	boot_dev->irq[irq->port].dev_type = irq->dev_type;
636	boot_dev->irq[irq->port].channel = irq->channel;
637	boot_dev->irq[irq->port].is_rx = irq->is_rx;
638
639	#if DEBUG_BOOT_INFO
640	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
641	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
642	#endif
643
644	}
645	}
646	}
647	}
648	} // end loop on local peripherals
649
650	// initialize number of internal peripherals
651	boot_info->int_dev_nr = device_id;
652
653	// Get the top address of the kernel segments
654	end = boot_info->kdata_base + boot_info->kdata_size;
655
656	// compute number of physical pages occupied by the kernel code
657	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
658	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
659
660	// no reserved sones for TSAR architecture
661	boot_info->rsvd_nr = 0;
662
663	// set boot_info signature
664	boot_info->signature = BOOT_INFO_SIGNATURE;
665
666	} // boot_info_init()
667
668	/***********************************************************************************
669	* This function check the local boot_info_t structure for a given core.
670	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
671	* @ lid : core local identifier, index the core descriptor table.
672	**********************************************************************************/
673	static void boot_check_core( boot_info_t * boot_info,
674	lid_t lid)
675	{
676	gid_t gid; // global hardware identifier of this core
677	boot_core_t * this; // BOOT_INFO core descriptor of this core.
678
679	// Get core hardware identifier
680	gid = (gid_t)boot_get_procid();
681
682	// get pointer on core descriptor
683	this = &boot_info->core[lid];
684
685	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
686	{
687	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
688	" - boot_info cxy = %x\n"
689	" - boot_info lid = %d\n"
690	" - boot_info gid = %x\n"
691	" - actual gid = %x\n",
692	this->cxy , this->lid , this->gid , gid );
693	boot_exit();
694	}
695
696	} // boot_check_core()
697
698	/*********************************************************************************
699	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
700	* It returns the number of CP0s actually activated.
701	********************************************************************************/
702	static uint32_t boot_wake_all_cp0s( void )
703	{
704	archinfo_header_t* header; // Pointer on ARCHINFO header
705	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
706	archinfo_cluster_t* cluster; // Iterator for loop on clusters
707	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
708	archinfo_device_t* device; // Iterator for loop on devices
709	uint32_t cp0_nb = 0; // CP0s counter
710
711	header = (archinfo_header_t*)ARCHINFO_BASE;
712	cluster_base = archinfo_get_cluster_base(header);
713	device_base = archinfo_get_device_base (header);
714
715	// loop on all clusters
716	for (cluster = cluster_base;
717	cluster < &cluster_base[header->x_size * header->y_size];
718	cluster++)
719	{
720	// Skip boot cluster.
721	if (cluster->cxy == BOOT_CORE_CXY)
722	continue;
723
724	// Skip clusters without core (thus without CP0).
725	if (cluster->cores == 0)
726	continue;
727
728	// Skip clusters without device (thus without XICU).
729	if (cluster->devices == 0)
730	continue;
731
732	// search XICU device associated to CP0, and send a WTI to activate it
733	for (device = &device_base[cluster->device_offset];
734	device < &device_base[cluster->device_offset + cluster->devices];
735	device++)
736	{
737	if (device->type == DEV_TYPE_ICU_XCU)
738	{
739
740	#if DEBUG_BOOT_WAKUP
741	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
742	cluster->cxy , boot_get_proctime );
743	#endif
744
745	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
746	cp0_nb++;
747	}
748	}
749	}
750	return cp0_nb;
751
752	} // boot_wake_cp0()
753
754	/*********************************************************************************
755	* This function is called by all CP0 to activate the other CPi cores.
756	* @ boot_info : pointer to local 'boot_info_t' structure.
757	*********************************************************************************/
758	static void boot_wake_local_cores(boot_info_t * boot_info)
759	{
760	unsigned int core_id;
761
762	// get pointer on XCU device descriptor in boot_info
763	boot_device_t * xcu = &boot_info->int_dev[0];
764
765	// loop on cores
766	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
767	{
768
769	#if DEBUG_BOOT_WAKUP
770	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
771	boot_info->cxy , core_id , boot_get_proctime() );
772	#endif
773	// send an IPI
774	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
775	}
776	} // boot_wake_local_cores()
777
778
779	/*********************************************************************************
780	* This main function of the boot-loader is called by the boot_entry()
781	* function, and executed by all cores.
782	* The arguments values are computed by the boot_entry code.
783	* @ lid : core local identifier,
784	* @ cxy : cluster identifier,
785	*********************************************************************************/
786	void boot_loader( lid_t lid,
787	cxy_t cxy )
788	{
789	boot_info_t * boot_info; // pointer on local boot_info_t structure
790
791	if (lid == 0)
792	{
793	/****************************************************
794	* PHASE A : only CP0 in boot cluster executes it
795	***************************************************/
796	if (cxy == BOOT_CORE_CXY)
797	{
798	boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n",
799	cxy , lid , boot_get_proctime() );
800
801	// Initialize IOC driver
802	if (USE_IOC_BDV) boot_bdv_init();
803	else if (USE_IOC_HBA) boot_hba_init();
804	// else if (USE_IOC_SDC) boot_sdc_init();
805	else if (USE_IOC_SPI) boot_spi_init();
806	else if (!USE_IOC_RDK)
807	{
808	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
809	boot_exit();
810	}
811
812	// Initialize FAT32.
813	boot_fat32_init();
814
815	// Load the 'kernel.elf' file into memory from IOC, and set
816	// the global variables defining the kernel layout
817	boot_kernel_load();
818
819	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
820	cxy , lid , boot_get_proctime() );
821
822	// Load the arch_info.bin file into memory.
823	boot_archinfo_load();
824
825	// Get local boot_info_t structure base address.
826	// It is the first structure in the .kdata segment.
827	boot_info = (boot_info_t *)seg_kdata_base;
828
829	// Initialize local boot_info_t structure.
830	boot_info_init( boot_info , cxy );
831
832	// check boot_info signature
833	if (boot_info->signature != BOOT_INFO_SIGNATURE)
834	{
835	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
836	" illegal boot_info signature / should be %x\n",
837	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
838	boot_exit();
839	}
840
841	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
842	cxy , lid , boot_get_proctime() );
843
844	// Check core information.
845	boot_check_core(boot_info, lid);
846
847	// Activate other CP0s / get number of active CP0s
848	active_cp0s_nr = boot_wake_all_cp0s() + 1;
849
850	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
851	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
852	active_cp0s_nr );
853
854	// activate other local cores
855	boot_wake_local_cores( boot_info );
856
857	// display address extensions
858	// uint32_t cp2_data_ext;
859	// uint32_t cp2_ins_ext;
860	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
861	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
862	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
863	// cxy , lid , cp2_data_ext , cp2_ins_ext );
864
865	// Wait until all local cores in cluster ready
866	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
867	boot_info->cores_nr );
868	}
869	/******************************************************************
870	* PHASE B : all CP0s other than CP0 in boot cluster execute it
871	*****************************************************************/
872	else
873	{
874	// at this point, all INSTRUCTION address extension registers
875	// point on cluster(0,0), but the DATA extension registers point
876	// already on the local cluster to use the local stack.
877	// To access the bootloader global variables we must first copy
878	// the boot code (data and instructions) in the local cluster.
879	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
880	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
881	BOOT_MAX_SIZE );
882
883	// from now, it is safe to refer to the boot code global variables
884	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
885	cxy , lid , boot_get_proctime() );
886
887	// switch to the INSTRUCTION local memory space, to avoid contention.
888	// asm volatile("mtc2 %0, $25" :: "r"(cxy));
889
890	// Copy the arch_info.bin file into the local memory.
891	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
892	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
893	ARCHINFO_MAX_SIZE );
894
895	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
896	cxy , lid , boot_get_proctime() );
897
898	// Copy the kcode segment into local memory
899	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
900	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
901	seg_kcode_size );
902
903	// Copy the kdata segment into local memory
904	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
905	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
906	seg_kdata_size );
907
908	// Copy the kentry segment into local memory
909	boot_remote_memcpy( XPTR( cxy , seg_kentry_base ),
910	XPTR( BOOT_CORE_CXY , seg_kentry_base ),
911	seg_kentry_size );
912
913	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
914	cxy , lid , boot_get_proctime() );
915
916	// Get local boot_info_t structure base address.
917	boot_info = (boot_info_t*)seg_kdata_base;
918
919	// Initialize local boot_info_t structure.
920	boot_info_init( boot_info , cxy );
921
922	// Check core information.
923	boot_check_core( boot_info , lid );
924
925	// get number of active clusters from BOOT_CORE cluster
926	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
927
928	// Wait until all clusters (i.e all CP0s) ready to enter kernel
929	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
930
931	// activate other local cores
932	boot_wake_local_cores( boot_info );
933
934	// display address extensions
935	// uint32_t cp2_data_ext;
936	// uint32_t cp2_ins_ext;
937	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
938	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
939	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
940	// cxy , lid , cp2_data_ext , cp2_ins_ext );
941
942	// Wait until all local cores in cluster ready
943	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
944	boot_info->cores_nr );
945	}
946	}
947	else
948	{
949	/***************************************************************
950	* PHASE C: all non CP0 cores in all clusters execute it
951	**************************************************************/
952
953	// Switch to the INSTRUCTIONS local memory space
954	// to avoid contention at the boot cluster.
955	// asm volatile("mtc2 %0, $25" :: "r"(cxy));
956
957	// Get local boot_info_t structure base address.
958	boot_info = (boot_info_t *)seg_kdata_base;
959
960	// Check core information
961	boot_check_core(boot_info, lid);
962
963	// display address extensions
964	// uint32_t cp2_data_ext;
965	// uint32_t cp2_ins_ext;
966	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
967	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
968	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
969	// cxy , lid , cp2_data_ext , cp2_ins_ext );
970
971	// Wait until all local cores in cluster ready
972	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
973	}
974
975	// Each core initialise the following registers before jumping to kernel:
976	// - sp_29 : stack pointer on idle thread,
977	// - c0_sr : reset BEV bit
978	// - a0_04 : pointer on boot_info structure
979	// - c0_ebase : kentry_base(and jump to kernel_entry.
980
981	// The array of idle-thread descriptors is allocated in the kdata segment,
982	// just after the boot_info structure
983	uint32_t sp;
984	uint32_t base;
985	uint32_t offset = sizeof( boot_info_t );
986	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
987	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
988
989	// compute base address of idle thread descriptors array
990	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
991	else base = seg_kdata_base + offset;
992
993	// compute stack pointer
994	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
995
996	asm volatile( "mfc0 $27, $12 \n"
997	"lui $26, 0xFFBF \n"
998	"ori $26, $26, 0xFFFF \n"
999	"and $27, $27, $26 \n"
1000	"mtc0 $27, $12 \n"
1001	"move $4, %0 \n"
1002	"move $29, %1 \n"
1003	"mtc0 %2, $15, 1 \n"
1004	"jr %3 \n"
1005	:
1006	: "r"(boot_info) ,
1007	"r"(sp) ,
1008	"r"(boot_info->kentry_base) ,
1009	"r"(kernel_entry)
1010	: "$26" , "$27" , "$29" , "$4" );
1011
1012
1013	} // boot_loader()

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