Context Navigation

source: trunk/boot/tsar_mips32/boot.c @ 568

Last change on this file since 568 was 562, checked in by nicolas.van.phan@…, 6 years ago
Disable DQDT and remove y_max FOR GOOD
File size: 40.2 KB

Rev	Line
[439]	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>
[457]	72	#include <hal_kernel_types.h>
[439]	73
	74	#include <kernel_config.h>
	75	#include <boot_config.h>
	76
	77	#include <arch_info.h>
	78	#include <boot_info.h>
	79
[557]	80	#include <cluster_info.h>
	81
[439]	82	#include <boot_utils.h>
	83	#include <boot_fat32.h>
	84	#include <boot_bdv_driver.h>
	85	#include <boot_hba_driver.h>
[547]	86	#include <boot_spi_driver.h>
[439]	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
[524]	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 );
[439]	124
	125	/*********************************************************************************
	126	* This function returns the printable string for each device type
	127	********************************************************************************/
[534]	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";
[557]	144	case DEV_TYPE_TXT_MTY: return "TXT_MTY";
[534]	145	case DEV_TYPE_ICU_XCU: return "ICU_XCU";
	146	case DEV_TYPE_PIC_TSR: return "PIC_TSR";
	147	default: return "undefined";
	148	}
[439]	149	}
	150
	151	/************************************************************************************
	152	* This function loads the arch_info.bin file into the boot cluster memory.
	153	***********************************************************************************/
[474]	154	static void boot_archinfo_load( void )
[439]	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	*************************************************************************************/
[474]	188	static void boot_kernel_load( void )
[439]	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->paddr_width = header->paddr_width;
	408	boot_info->io_cxy = header->io_cxy;
	409
	410	// Initialize kernel segments from global variables
	411	boot_info->kcode_base = seg_kcode_base;
	412	boot_info->kcode_size = seg_kcode_size;
	413	boot_info->kdata_base = seg_kdata_base;
	414	boot_info->kdata_size = seg_kdata_size;
	415	boot_info->kentry_base = seg_kentry_base;
	416	boot_info->kentry_size = seg_kentry_size;
	417
[557]	418	/* Initialize all clusters as empty for now */
	419	int x, y;
	420	for ( x = 0; x < CONFIG_MAX_CLUSTERS_X; x++)
	421	{
	422	for ( x = 0; x < CONFIG_MAX_CLUSTERS_X; x++)
	423	{
	424	boot_info->cluster_info[x][y] = 0x0;
	425	}
	426	}
	427
[439]	428	// loop on arch_info clusters to get relevant pointers
	429	for (cluster = cluster_base;
	430	cluster < &cluster_base[header->x_size * header->y_size];
	431	cluster++)
	432	{
[557]	433	int x = cluster->cxy >> Y_WIDTH;
	434	int y = cluster->cxy & ((1 << Y_WIDTH) - 1);
	435
[439]	436	if( cluster->cxy == cxy ) my_cluster = cluster;
[557]	437	if( cluster->cxy == header->io_cxy ) {
	438	io_cluster = cluster;
	439	boot_info->cluster_info[x][y] \|= CINFO_IS_IO;
	440	}
	441	if ( cluster->cores > 0 ) {
	442	boot_info->cluster_info[x][y] \|= CINFO_ACTIVE;
	443	}
[439]	444	}
	445
	446	if( my_cluster == NULL )
	447	{
	448	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
	449	__FUNCTION__ , cxy );
	450	boot_exit();
	451	}
	452
	453	if( io_cluster == NULL )
	454	{
	455	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
	456	__FUNCTION__ , header->io_cxy );
	457	boot_exit();
	458	}
	459
	460	//////////////////////////////////////////////////////////
	461	// initialize the boot_info array of external peripherals
	462
	463	#if DEBUG_BOOT_INFO
	464	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
	465	__FUNCTION__ , boot_get_proctime() );
	466	#endif
	467
	468	device_id = 0;
	469	for (device = &device_base[io_cluster->device_offset];
	470	device < &device_base[io_cluster->device_offset + io_cluster->devices];
	471	device++ )
	472	{
	473	if( device_id >= CONFIG_MAX_EXT_DEV )
	474	{
	475	boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n",
	476	__FUNCTION__ );
	477	boot_exit();
	478	}
	479
	480	// keep only external devices
	481	if( (device->type != DEV_TYPE_RAM_SCL) &&
	482	(device->type != DEV_TYPE_ICU_XCU) &&
	483	(device->type != DEV_TYPE_MMC_TSR) &&
[550]	484	(device->type != DEV_TYPE_DMA_SCL) &&
	485	(device->type != DEV_TYPE_TXT_MTY) &&
	486	(device->type != DEV_TYPE_IOC_SPI) )
[439]	487	{
	488	boot_dev = &boot_info->ext_dev[device_id];
	489
	490	boot_dev->type = device->type;
	491	boot_dev->base = device->base;
	492	boot_dev->channels = device->channels;
	493	boot_dev->param0 = device->arg0;
	494	boot_dev->param1 = device->arg1;
	495	boot_dev->param2 = device->arg2;
	496	boot_dev->param3 = device->arg3;
	497	boot_dev->irqs = device->irqs;
	498
	499	device_id++;
	500
	501	#if DEBUG_BOOT_INFO
	502	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
	503	device_type_str( device->type ) , device->base , device->size ,
	504	device->channels , device->irqs );
	505	#endif
	506	}
	507
	508	// handle IRQs for PIC
	509	if (device->type == DEV_TYPE_PIC_TSR)
	510	{
	511	for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++)
	512	{
	513	boot_dev->irq[irq_id].valid = 0;
	514	}
	515
	516	for (irq = &irq_base[device->irq_offset];
	517	irq < &irq_base[device->irq_offset + device->irqs];
	518	irq++)
	519	{
	520	boot_dev->irq[irq->port].valid = 1;
	521	boot_dev->irq[irq->port].dev_type = irq->dev_type;
	522	boot_dev->irq[irq->port].channel = irq->channel;
	523	boot_dev->irq[irq->port].is_rx = irq->is_rx;
	524
	525	#if DEBUG_BOOT_INFO
	526	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
	527	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
	528	#endif
	529	}
	530	}
	531	} // end loop on io_cluster peripherals
	532
	533	// initialize number of external peripherals
	534	boot_info->ext_dev_nr = device_id;
	535
	536	// Initialize cluster specific resources
	537	boot_info->cxy = my_cluster->cxy;
	538
	539	#if DEBUG_BOOT_INFO
	540	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy );
	541	#endif
	542
	543	////////////////////////////////////////
	544	// Initialize array of core descriptors
	545	core_id = 0;
	546	for (core = &core_base[my_cluster->core_offset];
	547	core < &core_base[my_cluster->core_offset + my_cluster->cores];
	548	core++ )
	549	{
	550	boot_info->core[core_id].gid = (gid_t)core->gid;
	551	boot_info->core[core_id].lid = (lid_t)core->lid;
	552	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
	553
	554	#if DEBUG_BOOT_INFO
	555	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
	556	core->gid , core->cxy , core->lid );
	557	#endif
	558	core_id++;
	559	}
	560
	561	// Initialize number of cores in my_cluster
	562	boot_info->cores_nr = core_id;
	563
	564	//////////////////////////////////////////////////////////////////////
	565	// initialise boot_info array of internal devices (RAM, ICU, MMC, DMA)
	566
	567	#if DEBUG_BOOT_INFO
	568	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ , cxy );
	569	#endif
	570
	571	device_id = 0;
	572	for (device = &device_base[my_cluster->device_offset];
	573	device < &device_base[my_cluster->device_offset + my_cluster->devices];
	574	device++ )
	575	{
	576	// keep only internal devices
	577	if( (device->type == DEV_TYPE_RAM_SCL) \|\|
	578	(device->type == DEV_TYPE_ICU_XCU) \|\|
	579	(device->type == DEV_TYPE_MMC_TSR) \|\|
[534]	580	(device->type == DEV_TYPE_DMA_SCL) \|\|
[550]	581	(device->type == DEV_TYPE_TXT_MTY) \|\|
	582	(device->type == DEV_TYPE_IOC_SPI) )
[439]	583	{
	584	if (device->type == DEV_TYPE_RAM_SCL) // RAM
	585	{
[550]	586	// set number of physical memory pages
[439]	587	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
	588
	589	#if DEBUG_BOOT_INFO
	590	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
	591	#endif
	592	}
[534]	593	else // ICU / MMC / DMA / MTY
[439]	594	{
	595	if( device_id >= CONFIG_MAX_INT_DEV )
	596	{
	597	boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n",
	598	__FUNCTION__ , cxy );
	599	boot_exit();
	600	}
	601
	602	boot_dev = &boot_info->int_dev[device_id];
	603
	604	boot_dev->type = device->type;
	605	boot_dev->base = device->base;
	606	boot_dev->channels = device->channels;
	607	boot_dev->param0 = device->arg0;
	608	boot_dev->param1 = device->arg1;
	609	boot_dev->param2 = device->arg2;
	610	boot_dev->param3 = device->arg3;
	611	boot_dev->irqs = device->irqs;
	612
	613	device_id++;
	614
	615	#if DEBUG_BOOT_INFO
	616	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
	617	device_type_str( device->type ) , device->base , device->size ,
	618	device->channels , device->irqs );
	619	#endif
	620
	621	// handle IRQs for ICU
	622	if (device->type == DEV_TYPE_ICU_XCU)
	623	{
	624	for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++)
	625	{
	626	boot_dev->irq[irq_id].valid = 0;
	627	}
	628
	629	for (irq = &irq_base[device->irq_offset];
	630	irq < &irq_base[device->irq_offset + device->irqs] ; irq++)
	631	{
	632	boot_dev->irq[irq->port].valid = 1;
	633	boot_dev->irq[irq->port].dev_type = irq->dev_type;
	634	boot_dev->irq[irq->port].channel = irq->channel;
	635	boot_dev->irq[irq->port].is_rx = irq->is_rx;
	636
	637	#if DEBUG_BOOT_INFO
	638	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
	639	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
	640	#endif
	641
	642	}
	643	}
	644	}
	645	}
	646	} // end loop on local peripherals
	647
	648	// initialize number of internal peripherals
	649	boot_info->int_dev_nr = device_id;
	650
	651	// Get the top address of the kernel segments
	652	end = boot_info->kdata_base + boot_info->kdata_size;
	653
	654	// compute number of physical pages occupied by the kernel code
	655	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
	656	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
	657
	658	// no reserved sones for TSAR architecture
	659	boot_info->rsvd_nr = 0;
	660
	661	// set boot_info signature
	662	boot_info->signature = BOOT_INFO_SIGNATURE;
	663
	664	} // boot_info_init()
	665
	666	/***********************************************************************************
	667	* This function check the local boot_info_t structure for a given core.
	668	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
	669	* @ lid : core local identifier, index the core descriptor table.
	670	**********************************************************************************/
	671	static void boot_check_core( boot_info_t * boot_info,
	672	lid_t lid)
	673	{
	674	gid_t gid; // global hardware identifier of this core
	675	boot_core_t * this; // BOOT_INFO core descriptor of this core.
	676
	677	// Get core hardware identifier
	678	gid = (gid_t)boot_get_procid();
	679
	680	// get pointer on core descriptor
	681	this = &boot_info->core[lid];
	682
	683	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
	684	{
	685	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
	686	" - boot_info cxy = %x\n"
	687	" - boot_info lid = %d\n"
	688	" - boot_info gid = %x\n"
	689	" - actual gid = %x\n",
	690	this->cxy , this->lid , this->gid , gid );
	691	boot_exit();
	692	}
	693
	694	} // boot_check_core()
	695
	696	/*********************************************************************************
	697	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
	698	* It returns the number of CP0s actually activated.
	699	********************************************************************************/
[527]	700	static uint32_t boot_wake_all_cp0s( void )
[439]	701	{
	702	archinfo_header_t* header; // Pointer on ARCHINFO header
	703	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
	704	archinfo_cluster_t* cluster; // Iterator for loop on clusters
	705	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
	706	archinfo_device_t* device; // Iterator for loop on devices
	707	uint32_t cp0_nb = 0; // CP0s counter
	708
	709	header = (archinfo_header_t*)ARCHINFO_BASE;
	710	cluster_base = archinfo_get_cluster_base(header);
	711	device_base = archinfo_get_device_base (header);
	712
	713	// loop on all clusters
	714	for (cluster = cluster_base;
	715	cluster < &cluster_base[header->x_size * header->y_size];
	716	cluster++)
	717	{
	718	// Skip boot cluster.
	719	if (cluster->cxy == BOOT_CORE_CXY)
	720	continue;
	721
	722	// Skip clusters without core (thus without CP0).
	723	if (cluster->cores == 0)
	724	continue;
	725
	726	// Skip clusters without device (thus without XICU).
	727	if (cluster->devices == 0)
	728	continue;
	729
	730	// search XICU device associated to CP0, and send a WTI to activate it
	731	for (device = &device_base[cluster->device_offset];
	732	device < &device_base[cluster->device_offset + cluster->devices];
	733	device++)
	734	{
	735	if (device->type == DEV_TYPE_ICU_XCU)
	736	{
	737
	738	#if DEBUG_BOOT_WAKUP
	739	boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n",
	740	cluster->cxy , boot_get_proctime );
	741	#endif
	742
	743	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
	744	cp0_nb++;
	745	}
	746	}
	747	}
	748	return cp0_nb;
	749
	750	} // boot_wake_cp0()
	751
	752	/*********************************************************************************
	753	* This function is called by all CP0 to activate the other CPi cores.
	754	* @ boot_info : pointer to local 'boot_info_t' structure.
	755	*********************************************************************************/
	756	static void boot_wake_local_cores(boot_info_t * boot_info)
	757	{
	758	unsigned int core_id;
	759
	760	// get pointer on XCU device descriptor in boot_info
	761	boot_device_t * xcu = &boot_info->int_dev[0];
	762
	763	// loop on cores
	764	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
	765	{
	766
	767	#if DEBUG_BOOT_WAKUP
	768	boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n",
	769	boot_info->cxy , core_id , boot_get_proctime() );
	770	#endif
	771	// send an IPI
	772	boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry );
	773	}
	774	} // boot_wake_local_cores()
	775
	776
	777	/*********************************************************************************
	778	* This main function of the boot-loader is called by the boot_entry()
	779	* function, and executed by all cores.
	780	* The arguments values are computed by the boot_entry code.
	781	* @ lid : core local identifier,
	782	* @ cxy : cluster identifier,
	783	*********************************************************************************/
[524]	784	void boot_loader( lid_t lid,
	785	cxy_t cxy )
[439]	786	{
	787	boot_info_t * boot_info; // pointer on local boot_info_t structure
	788
	789	if (lid == 0)
	790	{
	791	/****************************************************
	792	* PHASE A : only CP0 in boot cluster executes it
	793	***************************************************/
	794	if (cxy == BOOT_CORE_CXY)
	795	{
	796	boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n",
	797	cxy , lid , boot_get_proctime() );
	798
	799	// Initialize IOC driver
	800	if (USE_IOC_BDV) boot_bdv_init();
	801	else if (USE_IOC_HBA) boot_hba_init();
	802	// else if (USE_IOC_SDC) boot_sdc_init();
[547]	803	else if (USE_IOC_SPI) boot_spi_init();
[439]	804	else if (!USE_IOC_RDK)
	805	{
	806	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
	807	boot_exit();
	808	}
	809
	810	// Initialize FAT32.
	811	boot_fat32_init();
	812
	813	// Load the 'kernel.elf' file into memory from IOC, and set
	814	// the global variables defining the kernel layout
	815	boot_kernel_load();
	816
	817	boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n",
	818	cxy , lid , boot_get_proctime() );
	819
	820	// Load the arch_info.bin file into memory.
	821	boot_archinfo_load();
	822
	823	// Get local boot_info_t structure base address.
	824	// It is the first structure in the .kdata segment.
	825	boot_info = (boot_info_t *)seg_kdata_base;
	826
	827	// Initialize local boot_info_t structure.
	828	boot_info_init( boot_info , cxy );
	829
	830	// check boot_info signature
	831	if (boot_info->signature != BOOT_INFO_SIGNATURE)
	832	{
	833	boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n"
	834	" illegal boot_info signature / should be %x\n",
	835	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
	836	boot_exit();
	837	}
	838
	839	boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n",
	840	cxy , lid , boot_get_proctime() );
	841
	842	// Check core information.
	843	boot_check_core(boot_info, lid);
	844
	845	// Activate other CP0s / get number of active CP0s
	846	active_cp0s_nr = boot_wake_all_cp0s() + 1;
	847
	848	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
	849	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
	850	active_cp0s_nr );
	851
	852	// activate other local cores
	853	boot_wake_local_cores( boot_info );
	854
	855	// display address extensions
	856	// uint32_t cp2_data_ext;
	857	// uint32_t cp2_ins_ext;
	858	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
	859	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
	860	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
	861	// cxy , lid , cp2_data_ext , cp2_ins_ext );
	862
	863	// Wait until all local cores in cluster ready
	864	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
	865	boot_info->cores_nr );
	866	}
	867	/******************************************************************
	868	* PHASE B : all CP0s other than CP0 in boot cluster execute it
	869	*****************************************************************/
	870	else
	871	{
	872	// at this point, all INSTRUCTION address extension registers
	873	// point on cluster(0,0), but the DATA extension registers point
	874	// already on the local cluster to use the local stack.
	875	// To access the bootloader global variables we must first copy
	876	// the boot code (data and instructions) in the local cluster.
	877	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
	878	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
	879	BOOT_MAX_SIZE );
	880
	881	// from now, it is safe to refer to the boot code global variables
	882	boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n",
	883	cxy , lid , boot_get_proctime() );
	884
	885	// switch to the INSTRUCTION local memory space, to avoid contention.
[552]	886	// asm volatile("mtc2 %0, $25" :: "r"(cxy));
[439]	887
	888	// Copy the arch_info.bin file into the local memory.
	889	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
	890	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
	891	ARCHINFO_MAX_SIZE );
	892
	893	boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n",
	894	cxy , lid , boot_get_proctime() );
	895
	896	// Copy the kcode segment into local memory
	897	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
	898	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
	899	seg_kcode_size );
	900
	901	// Copy the kdata segment into local memory
	902	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
	903	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
	904	seg_kdata_size );
	905
	906	// Copy the kentry segment into local memory
	907	boot_remote_memcpy( XPTR( cxy , seg_kentry_base ),
	908	XPTR( BOOT_CORE_CXY , seg_kentry_base ),
	909	seg_kentry_size );
	910
	911	boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n",
	912	cxy , lid , boot_get_proctime() );
	913
	914	// Get local boot_info_t structure base address.
	915	boot_info = (boot_info_t*)seg_kdata_base;
	916
	917	// Initialize local boot_info_t structure.
	918	boot_info_init( boot_info , cxy );
	919
	920	// Check core information.
	921	boot_check_core( boot_info , lid );
	922
	923	// get number of active clusters from BOOT_CORE cluster
	924	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
	925
	926	// Wait until all clusters (i.e all CP0s) ready to enter kernel
	927	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
	928
	929	// activate other local cores
	930	boot_wake_local_cores( boot_info );
	931
	932	// display address extensions
	933	// uint32_t cp2_data_ext;
	934	// uint32_t cp2_ins_ext;
	935	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
	936	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
	937	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
	938	// cxy , lid , cp2_data_ext , cp2_ins_ext );
	939
	940	// Wait until all local cores in cluster ready
	941	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
	942	boot_info->cores_nr );
	943	}
	944	}
	945	else
	946	{
	947	/***************************************************************
	948	* PHASE C: all non CP0 cores in all clusters execute it
	949	**************************************************************/
	950
	951	// Switch to the INSTRUCTIONS local memory space
	952	// to avoid contention at the boot cluster.
[552]	953	// asm volatile("mtc2 %0, $25" :: "r"(cxy));
[439]	954
	955	// Get local boot_info_t structure base address.
	956	boot_info = (boot_info_t *)seg_kdata_base;
	957
	958	// Check core information
	959	boot_check_core(boot_info, lid);
	960
	961	// display address extensions
	962	// uint32_t cp2_data_ext;
	963	// uint32_t cp2_ins_ext;
	964	// asm volatile( "mfc2 %0, $24" : "=&r" (cp2_data_ext) );
	965	// asm volatile( "mfc2 %0, $25" : "=&r" (cp2_ins_ext) );
	966	// boot_printf("\n[BOOT] core[%x,%d] CP2_DATA_EXT = %x / CP2_INS_EXT = %x\n",
	967	// cxy , lid , cp2_data_ext , cp2_ins_ext );
	968
	969	// Wait until all local cores in cluster ready
	970	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
	971	}
	972
	973	// Each core initialise the following registers before jumping to kernel:
	974	// - sp_29 : stack pointer on idle thread,
	975	// - c0_sr : reset BEV bit
	976	// - a0_04 : pointer on boot_info structure
	977	// - c0_ebase : kentry_base(and jump to kernel_entry.
	978
	979	// The array of idle-thread descriptors is allocated in the kdata segment,
	980	// just after the boot_info structure
	981	uint32_t sp;
	982	uint32_t base;
	983	uint32_t offset = sizeof( boot_info_t );
	984	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
	985	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
	986
	987	// compute base address of idle thread descriptors array
	988	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
	989	else base = seg_kdata_base + offset;
	990
	991	// compute stack pointer
	992	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
	993
	994	asm volatile( "mfc0 $27, $12 \n"
	995	"lui $26, 0xFFBF \n"
	996	"ori $26, $26, 0xFFFF \n"
	997	"and $27, $27, $26 \n"
	998	"mtc0 $27, $12 \n"
	999	"move $4, %0 \n"
	1000	"move $29, %1 \n"
	1001	"mtc0 %2, $15, 1 \n"
	1002	"jr %3 \n"
	1003	:
	1004	: "r"(boot_info) ,
	1005	"r"(sp) ,
	1006	"r"(boot_info->kentry_base) ,
	1007	"r"(kernel_entry)
	1008	: "$26" , "$27" , "$29" , "$4" );
	1009
	1010
	1011	} // boot_loader()

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

Download in other formats: