Context Navigation

source: trunk/tools/bootloader_tsar/boot.c @ 90

Last change on this file since 90 was 68, checked in by alain, 7 years ago
Fix bug in kernel_init, and reduce size of remote_fifo.
File size: 36.8 KB

Rev	Line
[6]	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
[1]	24	/****************************************************************************
[6]	25	* This file contains the ALMOS-MKH. boot-loader for the TSAR architecture. *
[1]	26	* *
	27	* It supports clusterised shared memory multi-processor architectures, *
[50]	28	* where each processor core is identified by a composite index [cxy,lid] *
[1]	29	* with one physical memory bank per cluster. *
	30	* *
	31	* The 'boot.elf' file (containing the boot-loader binary code) is stored *
[50]	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]. *
[1]	34	* *
[50]	35	* 1) The boot-loader first phase is executed by core[0,0], while *
[1]	36	* all other cores are waiting in the preloader. *
	37	* It does the following tasks: *
[50]	38	* - load into the memory bank of cluster 0 the 'arch_info.bin' *
[1]	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 *
[50]	49	* CP0s (other than core[0,0]). Each CP0 performs the following tasks: *
[1]	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: *
[50]	61	* - activates the CPi of cluster(0), *
[1]	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>
[6]	72	#include <hal_types.h>
[1]	73
[13]	74	#include <kernel_config.h>
[1]	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
[6]	86	/*****************************************************************************
	87	* Macros.
[1]	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
[6]	94	/*****************************************************************************
	95	* Global variables.
[1]	96	****************************************************************************/
	97
	98	// synchronization variables.
	99
[6]	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
[1]	106
[6]	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 kernel_entry; // kernel entry point
[1]	112
[6]	113	// address used by the WTI to activate remote CP0s
[1]	114
[6]	115	extern void boot_entry(); // boot_loader entry point
[1]	116
[6]	117	/*********************************************************************************
	118	* This function returns the printable string for each device type
	119	********************************************************************************/
[1]	120	char * device_type_str( uint32_t dev_type )
	121	{
[6]	122	if ( dev_type == DEV_TYPE_RAM_SCL ) return "RAM_SCL";
	123	else if( dev_type == DEV_TYPE_ROM_SCL ) return "ROM_SCL";
	124	else if( dev_type == DEV_TYPE_FBF_SCL ) return "FBF_SCL";
	125	else if( dev_type == DEV_TYPE_IOB_TSR ) return "IOB_TSR";
[1]	126	else if( dev_type == DEV_TYPE_IOC_BDV ) return "IOC_BDV";
	127	else if( dev_type == DEV_TYPE_IOC_HBA ) return "IOC_HBA";
	128	else if( dev_type == DEV_TYPE_IOC_SDC ) return "IOC_SDC";
	129	else if( dev_type == DEV_TYPE_IOC_SPI ) return "IOC_SPI";
	130	else if( dev_type == DEV_TYPE_IOC_RDK ) return "IOC_RDK";
[6]	131	else if( dev_type == DEV_TYPE_MMC_TSR ) return "MMC_TSR";
	132	else if( dev_type == DEV_TYPE_DMA_SCL ) return "DMA_SCL";
	133	else if( dev_type == DEV_TYPE_NIC_CBF ) return "NIC_CBF";
	134	else if( dev_type == DEV_TYPE_TIM_SCL ) return "TIM_SCL";
	135	else if( dev_type == DEV_TYPE_TXT_TTY ) return "TXT_TTY";
	136	else if( dev_type == DEV_TYPE_ICU_XCU ) return "ICU_XCU";
	137	else if( dev_type == DEV_TYPE_PIC_TSR ) return "PIC_TSR";
	138	else return "undefined";
[1]	139	}
	140
[6]	141	/************************************************************************************
[1]	142	* This function loads the arch_info.bin file into the boot cluster memory.
[6]	143	***********************************************************************************/
[1]	144	static void boot_archinfo_load()
	145	{
	146	archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE;
	147
	148	// Load file into memory
	149	if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE))
	150	{
	151	boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): "
	152	"<%s> file not found\n",
	153	ARCHINFO_PATHNAME);
	154	boot_exit();
	155	}
	156
	157	if (header->signature != ARCHINFO_SIGNATURE)
	158	{
	159	boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): "
	160	"<%s> file signature should be %x\n",
	161	ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE);
	162	boot_exit();
	163	}
	164
	165	#if DEBUG_BOOT_INFO
[6]	166	boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n",
	167	__FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE );
[1]	168	#endif
	169
	170	} // boot_archinfo_load()
	171
[6]	172	/**************************************************************************************
	173	* This function loads the 'kernel.elf' file into the boot cluster memory buffer,
	174	* analyzes it, and places the the two seg_kcode & seg_kdata segments at their final
	175	* physical adresses (just after the preloader zone).
	176	* It set the global variables defining the kernel layout.
	177	*************************************************************************************/
[1]	178	static void boot_kernel_load()
	179	{
[6]	180	Elf32_Ehdr * elf_header; // pointer on kernel.elf header.
	181	Elf32_Phdr * program_header; // pointer on kernel.elf program header.
	182	uint32_t phdr_offset; // program header offset in kernel.elf file.
	183	uint32_t segments_nb; // number of segments in kernel.elf file.
	184	uint32_t seg_src_addr; // segment address in kernel.elf file (source).
	185	uint32_t seg_paddr; // segment local physical address of segment
	186	uint32_t seg_offset; // segment offset in kernel.elf file
	187	uint32_t seg_filesz; // segment size (bytes) in kernel.elf file
	188	uint32_t seg_memsz; // segment size (bytes) in memory image.
	189	bool_t kcode_found; // kcode segment found.
	190	bool_t kdata_found; // kdata segment found.
	191	uint32_t seg_id; // iterator for segments loop.
[1]	192
[6]	193	#if DEBUG_BOOT_ELF
	194	boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n",
	195	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
	196	#endif
[1]	197
[6]	198	// Load kernel.elf file into memory buffer
	199	if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) )
[1]	200	{
[6]	201	boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n",
[1]	202	KERNEL_PATHNAME);
	203	boot_exit();
	204	}
	205
[6]	206	// get pointer to kernel.elf header
[1]	207	elf_header = (Elf32_Ehdr*)KERN_BASE;
	208
[6]	209	// check signature
[1]	210	if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) \|\|
	211	(elf_header->e_ident[EI_MAG1] != ELFMAG1) \|\|
	212	(elf_header->e_ident[EI_MAG2] != ELFMAG2) \|\|
	213	(elf_header->e_ident[EI_MAG3] != ELFMAG3))
	214	{
	215	boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): "
	216	"<%s> is not an ELF file\n",
	217	KERNEL_PATHNAME);
	218	boot_exit();
	219	}
	220
[6]	221	// Get program header table offset and number of segments
[1]	222	phdr_offset = elf_header->e_phoff;
	223	segments_nb = elf_header->e_phnum;
	224
[6]	225	// Get program header table pointer
[1]	226	program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset);
	227
[6]	228	// loop on segments
	229	kcode_found = false;
	230	kdata_found = false;
[1]	231	for (seg_id = 0; seg_id < segments_nb; seg_id++)
	232	{
[6]	233	if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment
[1]	234	{
[6]	235	// Get segment attributes.
[1]	236	seg_paddr = program_header[seg_id].p_paddr;
	237	seg_offset = program_header[seg_id].p_offset;
	238	seg_filesz = program_header[seg_id].p_filesz;
	239	seg_memsz = program_header[seg_id].p_memsz;
	240
[6]	241	// get segment base address in buffer
[1]	242	seg_src_addr = (uint32_t)KERN_BASE + seg_offset;
	243
[6]	244	// Load segment to its final physical memory address
	245	boot_memcpy( (void*)seg_paddr,
	246	(void*)seg_src_addr,
	247	seg_filesz );
	248
	249	#if DEBUG_BOOT_ELF
	250	boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n"
	251	" base = %x / size = %x\n",
	252	__FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz );
	253	#endif
	254
[1]	255	// Fill remaining memory with zero if (filesz < memsz).
[6]	256	if( seg_memsz < seg_filesz )
[1]	257	{
[6]	258	boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz);
[1]	259	}
	260
[6]	261	// Note: we suppose that the 'kernel.elf' file contains only 2
	262	// loadable segments ktext & kdata and that the main
	263	// difference between these two is the WRITE permission: ktext
	264	// contains read-only instructions and read_only data,
	265	// while kdata contains writable data.
	266
	267	if ((program_header[seg_id].p_flags & PF_W) == 0) // kcode segment
[1]	268	{
[6]	269	if( kcode_found )
	270	{
	271	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
	272	" two loadable kcode segments found\n",
	273	__FUNCTION__ , KERNEL_PATHNAME );
	274	boot_exit();
	275	}
	276
	277	kcode_found = true;
	278	seg_kcode_base = seg_paddr;
	279	seg_kcode_size = seg_memsz;
[1]	280	}
[6]	281	else // kdata segment
	282	{
	283	if( kdata_found )
	284	{
	285	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
	286	" two loadable kdata segments found\n",
	287	__FUNCTION__ , KERNEL_PATHNAME );
	288	boot_exit();
	289	}
	290
	291	kdata_found = true;
	292	seg_kdata_base = seg_paddr;
	293	seg_kdata_size = seg_memsz;
	294	}
[1]	295	}
	296	}
	297
[6]	298	// check kcode & kdata segments found
	299	if( kcode_found == false )
	300	{
	301	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
	302	" kcode segment not found\n",
	303	__FUNCTION__ , KERNEL_PATHNAME );
	304	boot_exit();
	305	}
	306	if( kdata_found == false )
	307	{
	308	boot_printf("\n[BOOT_ERROR] in %s for file %s :\n"
	309	" kdata segment not found\n",
	310	__FUNCTION__ , KERNEL_PATHNAME );
	311	boot_exit();
	312	}
	313
	314	// set entry point
[1]	315	kernel_entry = (uint32_t)elf_header->e_entry;
	316
[6]	317	#if DEBUG_BOOT_ELF
	318	boot_printf("\n[BOOT INFO] %s successfully completed for file %s at cycle %d\n",
	319	__FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() );
	320	#endif
	321
[1]	322	} // boot_kernel_load()
	323
[6]	324	/*************************************************************************************
	325	* This function initializes the boot_info_t structure for a given cluster.
	326	* @ boot_info : pointer to local boot_info_t structure
	327	* @ cxy : cluster identifier
	328	************************************************************************************/
[1]	329	static void boot_info_init( boot_info_t * boot_info,
	330	cxy_t cxy )
	331	{
[6]	332	archinfo_header_t * header;
[1]	333	archinfo_core_t * core_base;
	334	archinfo_cluster_t * cluster_base;
	335	archinfo_device_t * device_base;
	336	archinfo_irq_t * irq_base;
	337
	338	archinfo_cluster_t * cluster;
[6]	339	archinfo_cluster_t * my_cluster = NULL; // target cluster
	340	archinfo_cluster_t * io_cluster = NULL; // cluster containing ext. peripherals
	341
[1]	342	archinfo_core_t * core;
	343	uint32_t core_id;
	344	archinfo_device_t * device;
	345	uint32_t device_id;
	346	archinfo_irq_t * irq;
	347	uint32_t irq_id;
[50]	348	uint32_t end;
	349	uint32_t rsvd_pages;
[1]	350	boot_device_t * boot_dev;
	351
[6]	352	// get pointer on ARCHINFO header and on the four arch_info arrays
	353	header = (archinfo_header_t*)ARCHINFO_BASE;
	354	core_base = archinfo_get_core_base (header);
	355	cluster_base = archinfo_get_cluster_base(header);
	356	device_base = archinfo_get_device_base (header);
	357	irq_base = archinfo_get_irq_base (header);
	358
[1]	359	// Initialize global platform parameters
	360	boot_info->x_size = header->x_size;
	361	boot_info->y_size = header->y_size;
	362	boot_info->x_width = header->x_width;
	363	boot_info->y_width = header->y_width;
	364	boot_info->paddr_width = header->paddr_width;
	365	boot_info->io_cxy = header->io_cxy;
	366
[50]	367	// Initialize kernel segments from global variables
[6]	368	boot_info->kernel_code_start = seg_kcode_base;
	369	boot_info->kernel_code_end = seg_kcode_base + seg_kcode_size;
	370	boot_info->kernel_data_start = seg_kdata_base;
	371	boot_info->kernel_data_end = seg_kdata_base + seg_kdata_size;
[1]	372
[6]	373	// loop on arch_info clusters to get relevant pointers
[1]	374	for (cluster = cluster_base;
	375	cluster < &cluster_base[header->x_size * header->y_size];
	376	cluster++)
	377	{
[6]	378	if( cluster->cxy == cxy ) my_cluster = cluster;
	379	if( cluster->cxy == header->io_cxy ) io_cluster = cluster;
	380	}
[1]	381
[6]	382	if( my_cluster == NULL )
	383	{
	384	boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n",
	385	__FUNCTION__ , cxy );
	386	boot_exit();
	387	}
[1]	388
[6]	389	if( io_cluster == NULL )
	390	{
	391	boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n",
	392	__FUNCTION__ , header->io_cxy );
	393	boot_exit();
	394	}
	395
[13]	396	// loop on arch-info peripherals in io_cluster,
[6]	397	// to initialize the boot_info array of external peripherals
	398
[1]	399	#if DEBUG_BOOT_INFO
[13]	400	boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n",
	401	__FUNCTION__ , cxy , boot_get_proctime() );
[1]	402	#endif
[6]	403
	404	device_id = 0;
	405	for (device = &device_base[io_cluster->device_offset];
	406	device < &device_base[io_cluster->device_offset + io_cluster->devices];
	407	device++ )
	408	{
	409	// initialise one entry for each external peripheral
	410	if( (device->type != DEV_TYPE_RAM_SCL) &&
	411	(device->type != DEV_TYPE_ICU_XCU) &&
	412	(device->type != DEV_TYPE_MMC_TSR) &&
	413	(device->type != DEV_TYPE_DMA_SCL) )
[1]	414	{
[6]	415	boot_dev = &boot_info->ext_dev[device_id];
[1]	416
[6]	417	boot_dev->type = device->type;
	418	boot_dev->base = device->base;
	419	boot_dev->channels = device->channels;
	420	boot_dev->param0 = device->arg0;
	421	boot_dev->param1 = device->arg1;
	422	boot_dev->param2 = device->arg2;
	423	boot_dev->param3 = device->arg3;
	424	boot_dev->irqs = device->irqs;
	425
	426	device_id++;
	427
[1]	428	#if DEBUG_BOOT_INFO
[6]	429	boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n",
	430	device_type_str( device->type ) , device->base , device->size ,
	431	device->channels , device->irqs );
[1]	432	#endif
[13]	433	}
[6]	434
	435	// Initialize array of irq descriptors for PIC
	436	if (device->type == DEV_TYPE_PIC_TSR)
	437	{
	438	for (irq_id = 0; irq_id < CONFIG_MAX_IRQS_PER_PIC; irq_id++)
	439	{
	440	boot_dev->irq[irq_id].valid = 0;
	441	}
[1]	442
[6]	443	for (irq = &irq_base[device->irq_offset];
	444	irq < &irq_base[device->irq_offset + device->irqs];
	445	irq++)
	446	{
	447	boot_dev->irq[irq->port].valid = 1;
	448	boot_dev->irq[irq->port].dev_type = irq->dev_type;
	449	boot_dev->irq[irq->port].channel = irq->channel;
	450	boot_dev->irq[irq->port].is_rx = irq->is_rx;
	451
	452	#if DEBUG_BOOT_INFO
	453	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
	454	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
	455	#endif
	456	}
[1]	457	}
[13]	458	} // end loop on io_cluster peripherals
[1]	459
[6]	460	// initialize number of external peripherals
	461	boot_info->ext_dev_nr = device_id;
	462
	463	// Initialize cluster specific resources
	464	boot_info->cxy = my_cluster->cxy;
	465
	466	#if DEBUG_BOOT_INFO
	467	boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ );
	468	#endif
	469
	470	// Initialize array of core descriptors
	471	core_id = 0;
	472	for (core = &core_base[my_cluster->core_offset];
	473	core < &core_base[my_cluster->core_offset + my_cluster->cores];
	474	core++ )
	475	{
	476	boot_info->core[core_id].gid = (gid_t)core->gid;
	477	boot_info->core[core_id].lid = (lid_t)core->lid;
	478	boot_info->core[core_id].cxy = (cxy_t)core->cxy;
	479
	480	#if DEBUG_BOOT_INFO
	481	boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n",
	482	core->gid , core->cxy , core->lid );
	483	#endif
	484	core_id++;
	485	}
	486
	487	// Initialize number of cores in my_cluster
	488	boot_info->cores_nr = core_id;
	489
[13]	490	// initialise internal devices (RAM, XCU, MMC, DMA)
	491	// set default values, then scan all local devices
[6]	492
	493	#if DEBUG_BOOT_INFO
	494	boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", __FUNCTION__ );
	495	#endif
	496
[13]	497	boot_info->pages_nr = 0;
	498	boot_info->dev_icu.channels = 0;
	499	boot_info->dev_mmc.channels = 0;
	500	boot_info->dev_dma.channels = 0;
	501
[6]	502	for (device = &device_base[my_cluster->device_offset];
	503	device < &device_base[my_cluster->device_offset + my_cluster->devices];
	504	device++ )
	505	{
	506	if (device->type == DEV_TYPE_RAM_SCL)
	507	{
[50]	508	// set number of physical memory pages
	509	boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT;
[6]	510
[1]	511	#if DEBUG_BOOT_INFO
[50]	512	boot_printf(" - RAM : %x pages\n", boot_info->pages_nr );
[1]	513	#endif
[6]	514	}
[13]	515	else if (device->type == DEV_TYPE_ICU_XCU)
[6]	516	{
[13]	517	boot_dev = &boot_info->dev_icu;
	518
	519	boot_dev->type = device->type;
	520	boot_dev->base = device->base;
	521	boot_dev->channels = device->channels;
	522	boot_dev->param0 = device->arg0;
	523	boot_dev->param1 = device->arg1;
	524	boot_dev->param2 = device->arg2;
	525	boot_dev->param3 = device->arg3;
	526	boot_dev->irqs = device->irqs;
	527
	528	#if DEBUG_BOOT_INFO
	529	boot_printf(" - XCU : base = %l / size = %l / channels = %d / irqs = %d\n",
	530	device->base , device->size , device->channels , device->irqs );
	531	#endif
	532
[6]	533	for (irq_id = 0; irq_id < CONFIG_MAX_HWIS_PER_ICU; irq_id++)
	534	{
	535	boot_dev->irq[irq_id].valid = 0;
[1]	536	}
	537
[6]	538	for (irq = &irq_base[device->irq_offset];
	539	irq < &irq_base[device->irq_offset + device->irqs];
	540	irq++)
[1]	541	{
[6]	542	boot_dev->irq[irq->port].valid = 1;
	543	boot_dev->irq[irq->port].dev_type = irq->dev_type;
	544	boot_dev->irq[irq->port].channel = irq->channel;
	545	boot_dev->irq[irq->port].is_rx = irq->is_rx;
[1]	546
	547	#if DEBUG_BOOT_INFO
	548	boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n",
	549	irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx );
	550	#endif
	551
	552	}
	553	}
[13]	554	else if( device->type == DEV_TYPE_MMC_TSR )
	555	{
	556	boot_dev = &boot_info->dev_mmc;
[1]	557
[13]	558	boot_dev->type = device->type;
	559	boot_dev->base = device->base;
	560	boot_dev->channels = device->channels;
	561	boot_dev->irqs = 0;
[1]	562
[13]	563	#if DEBUG_BOOT_INFO
	564	boot_printf(" - MMC : base = %l / size = %l / channels = %d / irqs = %d\n",
	565	device->base , device->size , device->channels , device->irqs );
	566	#endif
	567	}
	568	else if( device->type == DEV_TYPE_DMA_SCL )
	569	{
	570	boot_dev = &boot_info->dev_dma;
	571
	572	boot_dev->type = device->type;
	573	boot_dev->base = device->base;
	574	boot_dev->channels = device->channels;
	575	boot_dev->irqs = 0;
	576
	577	#if DEBUG_BOOT_INFO
	578	boot_printf(" - DMA : base = %l / size = %l / channels = %d / irqs = %d\n",
	579	device->base , device->size , device->channels , device->irqs );
	580	#endif
	581	}
	582	} // end loop on local peripherals
	583
[50]	584	// Get the top address of the kernel segments
	585	end = (boot_info->kernel_code_end > boot_info->kernel_data_end ) ?
	586	boot_info->kernel_code_end : boot_info->kernel_data_end;
	587
[68]	588	// Set number of pages occupied by the kernel code
	589	boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ?
[50]	590	(end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1;
	591
[68]	592	// No "reserved zones" for the TSAR architecture
	593	boot_info->rsvd_nr = 0;
[50]	594
	595	#if DEBUG_BOOT_INFO
	596	boot_printf("\n[BOOT INFO] %s : Kernel Reserved Zone / base = 0 / npages = %d at cycle %d\n",
	597	__FUNCTION__ , rsvd_pages ,boot_get_proctime() );
	598	#endif
	599
[6]	600	// set boot_info signature
	601	boot_info->signature = BOOT_INFO_SIGNATURE;
	602
[1]	603	} // boot_info_init()
	604
[6]	605	/***********************************************************************************
	606	* This function check the local boot_info_t structure for a given core.
	607	* @ boot_info : pointer to local 'boot_info_t' structure to be checked.
	608	* @ lid : core local identifier, index the core descriptor table.
	609	**********************************************************************************/
[1]	610	static void boot_check_core( boot_info_t * boot_info,
	611	lid_t lid)
	612	{
	613	gid_t gid; // global hardware identifier of this core
	614	boot_core_t * this; // BOOT_INFO core descriptor of this core.
	615
	616	// Get core hardware identifier
	617	gid = (gid_t)boot_get_procid();
	618
	619	// get pointer on core descriptor
	620	this = &boot_info->core[lid];
	621
	622	if ( (this->gid != gid) \|\| (this->cxy != boot_info->cxy) )
	623	{
	624	boot_printf("\n[BOOT ERROR] in boot_check_core() :\n"
	625	" - boot_info cxy = %x\n"
	626	" - boot_info lid = %d\n"
	627	" - boot_info gid = %x\n"
	628	" - actual gid = %x\n",
	629	this->cxy , this->lid , this->gid , gid );
	630	boot_exit();
	631	}
	632
	633	} // boot_check_core()
	634
[6]	635	/*********************************************************************************
	636	* This function is called by CP0 in cluster(0,0) to activate all other CP0s.
[1]	637	* It returns the number of CP0s actually activated.
[6]	638	********************************************************************************/
	639	static uint32_t boot_wake_all_cp0s()
[1]	640	{
[6]	641	archinfo_header_t* header; // Pointer on ARCHINFO header
	642	archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base
	643	archinfo_cluster_t* cluster; // Iterator for loop on clusters
	644	archinfo_device_t* device_base; // Pointer on ARCHINFO devices base
	645	archinfo_device_t* device; // Iterator for loop on devices
	646	uint32_t cp0_nb = 0; // CP0s counter
[1]	647
	648	header = (archinfo_header_t*)ARCHINFO_BASE;
	649	cluster_base = archinfo_get_cluster_base(header);
	650	device_base = archinfo_get_device_base (header);
	651
	652	// loop on all clusters
	653	for (cluster = cluster_base;
	654	cluster < &cluster_base[header->x_size * header->y_size];
	655	cluster++)
	656	{
	657	// Skip boot cluster.
	658	if (cluster->cxy == BOOT_CORE_CXY)
	659	continue;
	660
	661	// Skip clusters without core (thus without CP0).
	662	if (cluster->cores == 0)
	663	continue;
	664
	665	// Skip clusters without device (thus without XICU).
	666	if (cluster->devices == 0)
	667	continue;
	668
[6]	669	// search XICU device associated to CP0, and send a WTI to activate it
[1]	670	for (device = &device_base[cluster->device_offset];
	671	device < &device_base[cluster->device_offset + cluster->devices];
	672	device++)
	673	{
[6]	674	if (device->type == DEV_TYPE_ICU_XCU)
[1]	675	{
[6]	676
	677	#if DEBUG_BOOT_WAKUP
	678	boot_printf("\n[BOOT] core[%x][0] activated at cycle %d\n",
	679	cluster->cxy , boot_get_proctime );
	680	#endif
	681
[1]	682	boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry);
	683	cp0_nb++;
	684	}
	685	}
	686	}
	687	return cp0_nb;
	688
	689	} // boot_wake_cp0()
	690
[6]	691	/*********************************************************************************
	692	* This function is called by all CP0 to activate all local CPi cores.
	693	* @ boot_info : pointer to local 'boot_info_t' structure, used to find
	694	* the XICU device associated with local CPi base addresses.
	695	*********************************************************************************/
	696	static void boot_wake_local_cores(boot_info_t * boot_info)
[1]	697	{
[6]	698	boot_device_t * device; // Iterator on devices
	699	unsigned int core_id; // Iterator on cores
[1]	700
[13]	701	device = &boot_info->dev_icu;
	702
	703	// loop on cores
	704	for (core_id = 1; core_id < boot_info->cores_nr; core_id++)
[1]	705	{
[6]	706
	707	#if DEBUG_BOOT_WAKUP
	708	boot_printf("\n[BOOT] core[%x][%d] activated at cycle %d\n",
	709	boot_info->cxy , core_id , boot_get_proctime() );
	710	#endif
[13]	711	boot_remote_sw( (xptr_t)(device->base + (core_id << 2)) , (uint32_t)boot_entry );
[1]	712	}
	713	} // boot_wake_local_cores()
	714
	715
[6]	716	/*********************************************************************************
[1]	717	* This main function of the boot-loader is called by the boot_entry()
	718	* function, and executed by all cores.
	719	* The arguments values are computed by the boot_entry code.
[6]	720	* @ lid : core local identifier,
[1]	721	* @ cxy : cluster identifier,
[6]	722	*********************************************************************************/
[1]	723	void boot_loader( lid_t lid,
	724	cxy_t cxy )
	725	{
[6]	726	boot_info_t * boot_info; // pointer on local boot_info_t structure
[1]	727
	728	if (lid == 0)
	729	{
[6]	730	/****************************************************
	731	* PHASE A : only CP0 in boot cluster executes it
	732	***************************************************/
[1]	733	if (cxy == BOOT_CORE_CXY)
	734	{
[6]	735	boot_printf("\n[BOOT] core[%x][%d] enters at cycle %d\n",
	736	cxy , lid , boot_get_proctime() );
[1]	737
	738	// Initialize IOC driver
	739	if (USE_IOC_BDV) boot_bdv_init();
	740	else if (USE_IOC_HBA) boot_hba_init();
[6]	741	// else if (USE_IOC_SDC) boot_sdc_init();
	742	// else if (USE_IOC_SPI) boot_spi_init();
[1]	743	else if (!USE_IOC_RDK)
	744	{
[6]	745	boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n");
[1]	746	boot_exit();
	747	}
	748
[6]	749	// Initialize FAT32.
[1]	750	boot_fat32_init();
	751
[6]	752	// Load the 'kernel.elf' file into memory from IOC, and set
	753	// the global variables defining the kernel layout
	754	boot_kernel_load();
	755
	756	boot_printf("\n[BOOT] core[%x][%d] loaded kernel at cycle %d\n",
	757	cxy , lid , boot_get_proctime() );
	758
[1]	759	// Load the arch_info.bin file into memory.
	760	boot_archinfo_load();
	761
[6]	762	// Get local boot_info_t structure base address.
[1]	763	// It is the first structure in the .kdata segment.
[6]	764	boot_info = (boot_info_t *)seg_kdata_base;
[1]	765
[6]	766	// Initialize local boot_info_t structure.
	767	boot_info_init( boot_info , cxy );
	768
	769	// check boot_info signature
[1]	770	if (boot_info->signature != BOOT_INFO_SIGNATURE)
	771	{
[6]	772	boot_printf("\n[BOOT ERROR] in %s reported by core[%x][%d]\n"
	773	" illegal boot_info signature / should be %x\n",
	774	__FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE );
[1]	775	boot_exit();
	776	}
	777
[6]	778	boot_printf("\n[BOOT] core[%x][%d] loaded boot_info at cycle %d\n",
	779	cxy , lid , boot_get_proctime() );
[1]	780
	781	// Check core information.
	782	boot_check_core(boot_info, lid);
	783
[6]	784	// Activate other CP0s / get number of active CP0s
	785	active_cp0s_nr = boot_wake_all_cp0s() + 1;
[1]	786
[6]	787	// Wait until all clusters (i.e all CP0s) ready to enter kernel.
	788	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) ,
	789	active_cp0s_nr );
[1]	790
[6]	791	// activate other local cores
	792	boot_wake_local_cores( boot_info );
[1]	793
[6]	794	// Wait until all local cores in cluster ready
	795	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
	796	boot_info->cores_nr );
[1]	797	}
[6]	798	/******************************************************************
	799	* PHASE B : all CP0s other than CP0 in boot cluster execute it
	800	*****************************************************************/
[1]	801	else
	802	{
[6]	803	// at this point, all INSTRUCTION address extension registers
	804	// point on cluster(0,0), but the DATA extension registers point
	805	// already on the local cluster to use the local stack.
	806	// To access the bootloader global variables we must first copy
	807	// the boot code (data and instructions) in the local cluster.
	808	boot_remote_memcpy( XPTR( cxy , BOOT_BASE ),
	809	XPTR( BOOT_CORE_CXY , BOOT_BASE ),
	810	BOOT_MAX_SIZE );
[1]	811
[6]	812	// from now, it is safe to refer to the boot code global variables
	813	boot_printf("\n[BOOT] core[%x][%d] replicated boot code at cycle %d\n",
	814	cxy , lid , boot_get_proctime() );
[1]	815
[6]	816	// switch to the INSTRUCTION local memory space, to avoid contention.
[1]	817	asm volatile("mtc2 %0, $25" :: "r"(cxy));
	818
[6]	819	// Copy the arch_info.bin file into the local memory.
[1]	820	boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE),
	821	XPTR(BOOT_CORE_CXY, ARCHINFO_BASE),
[6]	822	ARCHINFO_MAX_SIZE );
[1]	823
[6]	824	boot_printf("\n[BOOT] core[%x][%d] replicated arch_info at cycle %d\n",
	825	cxy , lid , boot_get_proctime() );
[1]	826
[6]	827	// Copy the kcode segment into local memory
	828	boot_remote_memcpy( XPTR( cxy , seg_kcode_base ),
	829	XPTR( BOOT_CORE_CXY , seg_kcode_base ),
	830	seg_kcode_size );
[1]	831
[6]	832	// Copy the kdata segment into local memory
	833	boot_remote_memcpy( XPTR( cxy , seg_kdata_base ),
	834	XPTR( BOOT_CORE_CXY , seg_kdata_base ),
	835	seg_kdata_size );
	836
	837	boot_printf("\n[BOOT] core[%x][%d] replicated kernel code at cycle %d\n",
	838	cxy , lid , boot_get_proctime() );
	839
	840	// Get local boot_info_t structure base address.
	841	boot_info = (boot_info_t*)seg_kdata_base;
	842
[1]	843	// Initialize local boot_info_t structure.
[6]	844	boot_info_init( boot_info , cxy );
[1]	845
	846	// Check core information.
[6]	847	boot_check_core( boot_info , lid );
[1]	848
[6]	849	// get number of active clusters from BOOT_CORE cluster
	850	uint32_t count = boot_remote_lw( XPTR( BOOT_CORE_CXY , &active_cp0s_nr ) );
[1]	851
[6]	852	// Wait until all clusters (i.e all CP0s) ready to enter kernel
	853	boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count );
[1]	854
[6]	855	// activate other local cores
	856	boot_wake_local_cores( boot_info );
	857
	858	// Wait until all local cores in cluster ready
	859	boot_remote_barrier( XPTR( cxy , &local_barrier ) ,
	860	boot_info->cores_nr );
[1]	861	}
	862	}
	863	else
	864	{
	865	/***************************************************************
[6]	866	* PHASE C: all non CP0 cores in all clusters execute it
[1]	867	**************************************************************/
	868
[6]	869	// Switch to the INSTRUCTIONS local memory space
	870	// to avoid contention at the boot cluster.
	871	asm volatile("mtc2 %0, $25" :: "r"(cxy));
[1]	872
[6]	873	// Get local boot_info_t structure base address.
	874	boot_info = (boot_info_t *)seg_kdata_base;
[1]	875
[6]	876	// Check core information
	877	boot_check_core(boot_info, lid);
[1]	878
[6]	879	// Wait until all local cores in cluster ready
	880	boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr );
[1]	881	}
	882
[13]	883	// Ech core compute stack pointer to the kernel idle-thread descriptor.
	884	// The array of idle-thread descriptors is allocated in the kdata segment,
	885	// just after the boot_info structure
[1]	886
[13]	887	uint32_t sp;
	888	uint32_t base;
	889	uint32_t offset = sizeof( boot_info_t );
	890	uint32_t pmask = CONFIG_PPM_PAGE_MASK;
	891	uint32_t psize = CONFIG_PPM_PAGE_SIZE;
	892
	893	// compute base address of idle thread descriptors array
	894	if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize;
	895	else base = seg_kdata_base + offset;
	896
	897	// compute stack pointer
	898	sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16;
	899
	900	// Each cores initialise stack pointer,
[6]	901	// reset the BEV bit in status register,
	902	// register "boot_info" argument in a0,
	903	// and jump to kernel_entry.
	904	asm volatile( "mfc0 $27, $12 \n"
	905	"lui $26, 0xFFBF \n"
	906	"ori $26, $26, 0xFFFF \n"
	907	"and $27, $27, $26 \n"
	908	"mtc0 $27, $12 \n"
	909	"move $4, %0 \n"
	910	"move $29, %1 \n"
	911	"jr %2 \n"
[13]	912	:: "r"(boot_info) , "r"(sp) , "r"(kernel_entry) );
[6]	913
[1]	914	} // boot_loader()

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

Download in other formats: