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boot.c @ 528

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

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

For safety reason and performance:

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

File size: 39.5 KB

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

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

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