[439] | 1 | /* |
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| 2 | * boot.c - TSAR bootloader implementation. |
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| 3 | * |
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[572] | 4 | * Authors : Vu Son (2016) |
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[623] | 5 | * Alain Greiner (2016,2017,2018,2019) |
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[439] | 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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| 25 | /**************************************************************************** |
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| 26 | * This file contains the ALMOS-MKH. boot-loader for the TSAR architecture. * |
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| 27 | * * |
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[623] | 28 | * It supports a clusterised, shared memory, multi-processor architecture, * |
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[439] | 29 | * where each processor core is identified by a composite index [cxy,lid] * |
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| 30 | * with one physical memory bank per cluster. * |
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| 31 | * * |
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| 32 | * The 'boot.elf' file (containing the boot-loader binary code) is stored * |
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[623] | 33 | * on disk (not in the FAT file system), and must be loaded into memory by * |
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| 34 | * the preloader running on the core[0][0] (cxy = 0 / lid = 0). * |
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[439] | 35 | * * |
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[623] | 36 | * The main task of the boot-loader is to load in the first physical page * |
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| 37 | * of each cluster a copy of the kernel code (segments "kcode" and "kdata") * |
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| 38 | * and to build - in each cluster - a cluster specific description of the * |
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| 39 | * hardware archtecture, stored in the "kdata" segment as the boot_info_t * |
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| 40 | * structure. The "kernel.elf" and "arch_info.bin" files are supposed to be * |
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| 41 | * stored on disk in a FAT32 file system. * |
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[439] | 42 | * * |
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[623] | 43 | * All cores contribute to the boot procedure, but all cores are not * |
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| 44 | * simultaneously active: * |
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| 45 | * - in a first phase, only core[0][0] is running (core 0 in cluster 0). * |
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| 46 | * - in a second phase, only core[cxy][0] is running in each cluster. * |
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| 47 | * - in last phase, all core[cxy][lid] are running. * |
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[439] | 48 | * * |
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[623] | 49 | * Finally, all cores jump to the kernel_init() function that makes the * |
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| 50 | * actual kernel initialisation. * |
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[439] | 51 | * * |
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[623] | 52 | * Implementation note: * * * |
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| 53 | * To allows each core to use the local copy of both the boot code and the * |
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| 54 | * kernel code, the boot-loader builds a minimal and temporary BPT (Boot * |
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| 55 | * Page Table) containing only two big pages: page[0] maps the kernel code, * |
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| 56 | * and page 1 maps the boot code. * |
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[439] | 57 | ****************************************************************************/ |
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| 58 | |
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| 59 | #include <elf-types.h> |
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[457] | 60 | #include <hal_kernel_types.h> |
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[439] | 61 | |
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| 62 | #include <kernel_config.h> |
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| 63 | #include <boot_config.h> |
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| 64 | |
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| 65 | #include <arch_info.h> |
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| 66 | #include <boot_info.h> |
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| 67 | |
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| 68 | #include <boot_utils.h> |
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| 69 | #include <boot_fat32.h> |
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| 70 | #include <boot_bdv_driver.h> |
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| 71 | #include <boot_hba_driver.h> |
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| 72 | #include <boot_tty_driver.h> |
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| 73 | |
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| 74 | /***************************************************************************** |
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| 75 | * Macros. |
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| 76 | ****************************************************************************/ |
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| 77 | |
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| 78 | #define PAGE_ROUND_DOWN(x) ((x) & (~PPM_PAGE_SIZE -1)) |
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| 79 | #define PAGE_ROUND_UP(x) (((x) + PPM_PAGE_SIZE-1) & \ |
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| 80 | (~(PPM_PAGE_SIZE-1))) |
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| 81 | |
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| 82 | /***************************************************************************** |
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| 83 | * Global variables. |
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| 84 | ****************************************************************************/ |
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| 85 | |
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[623] | 86 | // the Boot Page Table contains two PTE1, and should be aligned on 8 Kbytes |
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| 87 | |
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| 88 | uint32_t boot_pt[2] __attribute__((aligned(2048))); |
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| 89 | |
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[439] | 90 | // synchronization variables. |
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| 91 | |
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[623] | 92 | volatile boot_remote_spinlock_t tty0_lock; // protect TTY0 access |
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| 93 | volatile boot_remote_barrier_t global_barrier; // synchronize CP0 cores |
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| 94 | volatile boot_remote_barrier_t local_barrier; // synchronize cores in one cluster |
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| 95 | uint32_t active_cores_nr; // number of expected CP0s |
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[439] | 96 | |
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| 97 | // kernel segments layout variables |
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| 98 | |
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| 99 | uint32_t seg_kcode_base; // kcode segment base address |
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| 100 | uint32_t seg_kcode_size; // kcode segment size (bytes) |
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| 101 | uint32_t seg_kdata_base; // kdata segment base address |
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| 102 | uint32_t seg_kdata_size; // kdata segment size (bytes) |
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| 103 | uint32_t seg_kentry_base; // kcode segment base address |
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| 104 | uint32_t seg_kentry_size; // kcode segment size (bytes) |
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| 105 | |
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| 106 | uint32_t kernel_entry; // kernel entry point |
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| 107 | |
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[623] | 108 | // Functions |
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[439] | 109 | |
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[524] | 110 | extern void boot_entry( void ); // boot_loader entry point |
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| 111 | extern void boot_loader( lid_t lid, cxy_t cxy ); |
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[439] | 112 | |
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[572] | 113 | |
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| 114 | #if DEBUG_BOOT_INFO |
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[439] | 115 | /********************************************************************************* |
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[572] | 116 | * This debug function returns the printable string for each device type. |
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[439] | 117 | ********************************************************************************/ |
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[572] | 118 | static char * device_type_str( enum device_types_e dev_type ) |
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| 119 | { |
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| 120 | switch ( dev_type ) |
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| 121 | { |
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[534] | 122 | case DEV_TYPE_RAM_SCL: return "RAM_SCL"; |
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| 123 | case DEV_TYPE_ROM_SCL: return "ROM_SCL"; |
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| 124 | case DEV_TYPE_FBF_SCL: return "FBF_SCL"; |
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| 125 | case DEV_TYPE_IOB_TSR: return "IOB_TSR"; |
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| 126 | case DEV_TYPE_IOC_BDV: return "IOC_BDV"; |
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| 127 | case DEV_TYPE_IOC_HBA: return "IOC_HBA"; |
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| 128 | case DEV_TYPE_IOC_SDC: return "IOC_SDC"; |
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| 129 | case DEV_TYPE_IOC_SPI: return "IOC_SPI"; |
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| 130 | case DEV_TYPE_IOC_RDK: return "IOC_RDK"; |
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| 131 | case DEV_TYPE_MMC_TSR: return "MMC_TSR"; |
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| 132 | case DEV_TYPE_DMA_SCL: return "DMA_SCL"; |
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| 133 | case DEV_TYPE_NIC_CBF: return "NIC_CBF"; |
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| 134 | case DEV_TYPE_TIM_SCL: return "TIM_SCL"; |
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| 135 | case DEV_TYPE_TXT_TTY: return "TXT_TTY"; |
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[557] | 136 | case DEV_TYPE_TXT_MTY: return "TXT_MTY"; |
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[534] | 137 | case DEV_TYPE_ICU_XCU: return "ICU_XCU"; |
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| 138 | case DEV_TYPE_PIC_TSR: return "PIC_TSR"; |
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| 139 | default: return "undefined"; |
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| 140 | } |
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[439] | 141 | } |
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[572] | 142 | #endif |
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[439] | 143 | |
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| 144 | /************************************************************************************ |
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| 145 | * This function loads the arch_info.bin file into the boot cluster memory. |
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| 146 | ***********************************************************************************/ |
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[474] | 147 | static void boot_archinfo_load( void ) |
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[439] | 148 | { |
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| 149 | archinfo_header_t* header = (archinfo_header_t*)ARCHINFO_BASE; |
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| 150 | |
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| 151 | // Load file into memory |
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| 152 | if (boot_fat32_load(ARCHINFO_PATHNAME, ARCHINFO_BASE, ARCHINFO_MAX_SIZE)) |
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| 153 | { |
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| 154 | boot_printf("\n[BOOT ERROR]: boot_archinfo_load(): " |
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[572] | 155 | "<%s> file not found\n", |
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| 156 | ARCHINFO_PATHNAME); |
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[439] | 157 | boot_exit(); |
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| 158 | } |
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| 159 | |
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| 160 | if (header->signature != ARCHINFO_SIGNATURE) |
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| 161 | { |
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| 162 | boot_printf("\n[BOOT_ERROR]: boot_archinfo_load(): " |
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[572] | 163 | "<%s> file signature should be %x\n", |
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| 164 | ARCHINFO_PATHNAME, ARCHINFO_SIGNATURE); |
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[439] | 165 | boot_exit(); |
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| 166 | } |
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| 167 | |
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| 168 | #if DEBUG_BOOT_INFO |
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| 169 | boot_printf("\n[BOOT INFO] in %s : file %s loaded at address = %x\n", |
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[572] | 170 | __FUNCTION__ , ARCHINFO_PATHNAME , ARCHINFO_BASE ); |
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[439] | 171 | #endif |
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| 172 | |
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| 173 | } // boot_archinfo_load() |
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| 174 | |
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| 175 | /************************************************************************************** |
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| 176 | * This function loads the 'kernel.elf' file into the boot cluster memory buffer, |
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| 177 | * analyzes it, and places the three kcode, kentry, kdata segments at their final |
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| 178 | * physical adresses (defined the .elf file). |
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| 179 | * It set the global variables defining the kernel layout. |
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| 180 | *************************************************************************************/ |
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[474] | 181 | static void boot_kernel_load( void ) |
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[439] | 182 | { |
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| 183 | Elf32_Ehdr * elf_header; // pointer on kernel.elf header. |
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| 184 | Elf32_Phdr * program_header; // pointer on kernel.elf program header. |
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| 185 | uint32_t phdr_offset; // program header offset in kernel.elf file. |
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| 186 | uint32_t segments_nb; // number of segments in kernel.elf file. |
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| 187 | uint32_t seg_src_addr; // segment address in kernel.elf file (source). |
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| 188 | uint32_t seg_paddr; // segment local physical address of segment |
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| 189 | uint32_t seg_offset; // segment offset in kernel.elf file |
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| 190 | uint32_t seg_filesz; // segment size (bytes) in kernel.elf file |
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| 191 | uint32_t seg_memsz; // segment size (bytes) in memory image. |
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| 192 | bool_t kcode_found; // kcode segment found. |
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| 193 | bool_t kdata_found; // kdata segment found. |
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| 194 | bool_t kentry_found; // kentry segment found. |
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| 195 | uint32_t seg_id; // iterator for segments loop. |
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| 196 | |
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| 197 | #if DEBUG_BOOT_ELF |
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| 198 | boot_printf("\n[BOOT INFO] %s enters for file %s at cycle %d\n", |
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[572] | 199 | __FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() ); |
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[439] | 200 | #endif |
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| 201 | |
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| 202 | // Load kernel.elf file into memory buffer |
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| 203 | if ( boot_fat32_load(KERNEL_PATHNAME, KERN_BASE, KERN_MAX_SIZE) ) |
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| 204 | { |
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| 205 | boot_printf("\n[BOOT ERROR] in %s : <%s> file not found\n", |
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| 206 | KERNEL_PATHNAME); |
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| 207 | boot_exit(); |
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| 208 | } |
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| 209 | |
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| 210 | // get pointer to kernel.elf header |
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| 211 | elf_header = (Elf32_Ehdr*)KERN_BASE; |
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| 212 | |
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| 213 | // check signature |
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| 214 | if ((elf_header->e_ident[EI_MAG0] != ELFMAG0) || |
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| 215 | (elf_header->e_ident[EI_MAG1] != ELFMAG1) || |
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| 216 | (elf_header->e_ident[EI_MAG2] != ELFMAG2) || |
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| 217 | (elf_header->e_ident[EI_MAG3] != ELFMAG3)) |
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| 218 | { |
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| 219 | boot_printf("\n[BOOT_ERROR]: boot_kernel_load(): " |
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| 220 | "<%s> is not an ELF file\n", |
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| 221 | KERNEL_PATHNAME); |
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| 222 | boot_exit(); |
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| 223 | } |
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| 224 | |
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| 225 | // Get program header table offset and number of segments |
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| 226 | phdr_offset = elf_header->e_phoff; |
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| 227 | segments_nb = elf_header->e_phnum; |
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| 228 | |
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| 229 | // Get program header table pointer |
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| 230 | program_header = (Elf32_Phdr*)(KERN_BASE + phdr_offset); |
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| 231 | |
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| 232 | // loop on segments |
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| 233 | kcode_found = false; |
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| 234 | kdata_found = false; |
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| 235 | kentry_found = false; |
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| 236 | for (seg_id = 0; seg_id < segments_nb; seg_id++) |
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| 237 | { |
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| 238 | if (program_header[seg_id].p_type == PT_LOAD) // Found one loadable segment |
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| 239 | { |
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| 240 | // Get segment attributes. |
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| 241 | seg_paddr = program_header[seg_id].p_paddr; |
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| 242 | seg_offset = program_header[seg_id].p_offset; |
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| 243 | seg_filesz = program_header[seg_id].p_filesz; |
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| 244 | seg_memsz = program_header[seg_id].p_memsz; |
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| 245 | |
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| 246 | // get segment base address in buffer |
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| 247 | seg_src_addr = (uint32_t)KERN_BASE + seg_offset; |
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| 248 | |
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| 249 | // Load segment to its final physical memory address |
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| 250 | boot_memcpy( (void*)seg_paddr, |
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| 251 | (void*)seg_src_addr, |
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| 252 | seg_filesz ); |
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| 253 | |
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| 254 | #if DEBUG_BOOT_ELF |
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| 255 | boot_printf("\n[BOOT INFO] in %s for file %s : found loadable segment\n" |
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[572] | 256 | " base = %x / size = %x\n", |
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| 257 | __FUNCTION__ , KERNEL_PATHNAME , seg_paddr , seg_memsz ); |
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[439] | 258 | #endif |
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| 259 | |
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| 260 | // Fill remaining memory with zero if (filesz < memsz). |
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| 261 | if( seg_memsz < seg_filesz ) |
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| 262 | { |
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| 263 | boot_memset( (void*)(seg_paddr + seg_filesz), 0, seg_memsz - seg_filesz); |
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| 264 | } |
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| 265 | |
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| 266 | // Note: we suppose that the 'kernel.elf' file contains exactly |
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| 267 | // three loadable segments ktext, kentry, & kdata: |
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| 268 | // - the kcode segment is read-only and base == KCODE_BASE |
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| 269 | // - the kentry segment is read-only and base == KENTRY_BASE |
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| 270 | |
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| 271 | if( ((program_header[seg_id].p_flags & PF_W) == 0) && |
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| 272 | (program_header[seg_id].p_paddr == KCODE_BASE) ) // kcode segment |
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| 273 | { |
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| 274 | if( kcode_found ) |
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| 275 | { |
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| 276 | boot_printf("\n[BOOT_ERROR] in %s for file %s :\n" |
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[572] | 277 | " two kcode segments found\n", |
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| 278 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 279 | boot_exit(); |
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| 280 | } |
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| 281 | |
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| 282 | kcode_found = true; |
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| 283 | seg_kcode_base = seg_paddr; |
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| 284 | seg_kcode_size = seg_memsz; |
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| 285 | } |
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| 286 | else if( program_header[seg_id].p_paddr == KENTRY_BASE ) // kentry segment |
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| 287 | { |
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| 288 | if( kentry_found ) |
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| 289 | { |
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| 290 | boot_printf("\n[BOOT_ERROR] in %s for file %s :\n" |
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[572] | 291 | " two kentry segments found\n", |
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| 292 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 293 | boot_exit(); |
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| 294 | } |
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| 295 | |
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| 296 | kentry_found = true; |
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| 297 | seg_kentry_base = seg_paddr; |
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| 298 | seg_kentry_size = seg_memsz; |
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| 299 | } |
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| 300 | else // kdata segment |
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| 301 | { |
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| 302 | if( kdata_found ) |
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| 303 | { |
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| 304 | boot_printf("\n[BOOT_ERROR] in %s for file %s :\n" |
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[572] | 305 | " two kdata segments found\n", |
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| 306 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 307 | boot_exit(); |
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| 308 | } |
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| 309 | |
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| 310 | kdata_found = true; |
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| 311 | seg_kdata_base = seg_paddr; |
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| 312 | seg_kdata_size = seg_memsz; |
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| 313 | } |
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| 314 | } |
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| 315 | } |
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| 316 | |
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| 317 | // check kcode & kdata segments found |
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| 318 | if( kcode_found == false ) |
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| 319 | { |
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| 320 | boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode not found\n", |
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[572] | 321 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 322 | boot_exit(); |
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| 323 | } |
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| 324 | if( kentry_found == false ) |
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| 325 | { |
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| 326 | boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry not found\n", |
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[572] | 327 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 328 | boot_exit(); |
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| 329 | } |
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| 330 | if( kdata_found == false ) |
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| 331 | { |
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| 332 | boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kdata not found\n", |
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[572] | 333 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 334 | boot_exit(); |
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| 335 | } |
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| 336 | |
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| 337 | // check segments sizes |
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| 338 | if( seg_kentry_size > KENTRY_MAX_SIZE ) |
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| 339 | { |
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| 340 | boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kentry too large\n", |
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[572] | 341 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 342 | boot_exit(); |
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| 343 | } |
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| 344 | |
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| 345 | if( (seg_kcode_size + seg_kdata_size) > KCODE_MAX_SIZE ) |
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| 346 | { |
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| 347 | boot_printf("\n[BOOT_ERROR] in %s for file %s : seg_kcode + seg_kdata too large\n", |
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[572] | 348 | __FUNCTION__ , KERNEL_PATHNAME ); |
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[439] | 349 | } |
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| 350 | |
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| 351 | // set entry point |
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| 352 | kernel_entry = (uint32_t)elf_header->e_entry; |
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| 353 | |
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| 354 | #if DEBUG_BOOT_ELF |
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| 355 | boot_printf("\n[BOOT INFO] %s completed for file %s at cycle %d\n", |
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[572] | 356 | __FUNCTION__ , KERNEL_PATHNAME , boot_get_proctime() ); |
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[439] | 357 | #endif |
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| 358 | |
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| 359 | } // boot_kernel_load() |
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| 360 | |
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| 361 | /************************************************************************************* |
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| 362 | * This function initializes the boot_info_t structure for a given cluster. |
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| 363 | * @ boot_info : pointer to local boot_info_t structure |
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| 364 | * @ cxy : cluster identifier |
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| 365 | ************************************************************************************/ |
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| 366 | static void boot_info_init( boot_info_t * boot_info, |
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| 367 | cxy_t cxy ) |
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| 368 | { |
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| 369 | archinfo_header_t * header; |
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| 370 | archinfo_core_t * core_base; |
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| 371 | archinfo_cluster_t * cluster_base; |
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| 372 | archinfo_device_t * device_base; |
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| 373 | archinfo_irq_t * irq_base; |
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| 374 | |
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| 375 | archinfo_cluster_t * cluster; |
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| 376 | archinfo_cluster_t * my_cluster = NULL; // target cluster |
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[572] | 377 | archinfo_cluster_t * io_cluster = NULL; // external peripherals cluster |
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[439] | 378 | |
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| 379 | archinfo_core_t * core; |
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| 380 | uint32_t core_id; |
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| 381 | archinfo_device_t * device; |
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| 382 | uint32_t device_id; |
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| 383 | archinfo_irq_t * irq; |
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| 384 | uint32_t irq_id; |
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| 385 | uint32_t end; |
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| 386 | boot_device_t * boot_dev; |
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| 387 | |
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| 388 | // get pointer on ARCHINFO header and on the four arch_info arrays |
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| 389 | header = (archinfo_header_t*)ARCHINFO_BASE; |
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| 390 | core_base = archinfo_get_core_base (header); |
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| 391 | cluster_base = archinfo_get_cluster_base(header); |
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| 392 | device_base = archinfo_get_device_base (header); |
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| 393 | irq_base = archinfo_get_irq_base (header); |
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| 394 | |
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| 395 | // Initialize global platform parameters |
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| 396 | boot_info->x_size = header->x_size; |
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| 397 | boot_info->y_size = header->y_size; |
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| 398 | boot_info->x_width = header->x_width; |
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| 399 | boot_info->y_width = header->y_width; |
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| 400 | boot_info->paddr_width = header->paddr_width; |
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| 401 | boot_info->io_cxy = header->io_cxy; |
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| 402 | |
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| 403 | // Initialize kernel segments from global variables |
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| 404 | boot_info->kcode_base = seg_kcode_base; |
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| 405 | boot_info->kcode_size = seg_kcode_size; |
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| 406 | boot_info->kdata_base = seg_kdata_base; |
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| 407 | boot_info->kdata_size = seg_kdata_size; |
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| 408 | boot_info->kentry_base = seg_kentry_base; |
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| 409 | boot_info->kentry_size = seg_kentry_size; |
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| 410 | |
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[572] | 411 | // loop on arch_info clusters to build cluster_info[][] array |
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| 412 | // and get io_cluster and my_cluster pointers |
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[439] | 413 | for (cluster = cluster_base; |
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| 414 | cluster < &cluster_base[header->x_size * header->y_size]; |
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| 415 | cluster++) |
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| 416 | { |
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[557] | 417 | int x = cluster->cxy >> Y_WIDTH; |
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| 418 | int y = cluster->cxy & ((1 << Y_WIDTH) - 1); |
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[572] | 419 | boot_info->cluster_info[x][y] = (uint8_t)cluster->cores; |
---|
[557] | 420 | |
---|
[572] | 421 | if( cluster->cxy == cxy ) my_cluster = cluster; |
---|
| 422 | if( cluster->cxy == header->io_cxy ) io_cluster = cluster; |
---|
[439] | 423 | } |
---|
| 424 | |
---|
| 425 | if( my_cluster == NULL ) |
---|
| 426 | { |
---|
| 427 | boot_printf("\n[ERROR] in %s : cannot found cluster %x in arch_info\n", |
---|
[572] | 428 | __FUNCTION__ , cxy ); |
---|
[439] | 429 | boot_exit(); |
---|
| 430 | } |
---|
| 431 | |
---|
| 432 | if( io_cluster == NULL ) |
---|
| 433 | { |
---|
| 434 | boot_printf("\n[ERROR] in %s : cannot found io_cluster %x in arch_info\n", |
---|
[572] | 435 | __FUNCTION__ , cxy ); |
---|
[439] | 436 | boot_exit(); |
---|
| 437 | } |
---|
| 438 | |
---|
| 439 | ////////////////////////////////////////////////////////// |
---|
| 440 | // initialize the boot_info array of external peripherals |
---|
| 441 | |
---|
| 442 | #if DEBUG_BOOT_INFO |
---|
| 443 | boot_printf("\n[BOOT INFO] %s : external peripherals at cycle %d\n", |
---|
[572] | 444 | __FUNCTION__ , boot_get_proctime() ); |
---|
[439] | 445 | #endif |
---|
| 446 | |
---|
| 447 | device_id = 0; |
---|
| 448 | for (device = &device_base[io_cluster->device_offset]; |
---|
| 449 | device < &device_base[io_cluster->device_offset + io_cluster->devices]; |
---|
| 450 | device++ ) |
---|
| 451 | { |
---|
| 452 | if( device_id >= CONFIG_MAX_EXT_DEV ) |
---|
| 453 | { |
---|
| 454 | boot_printf("\n[ERROR] in %s : too much external devices in arch_info\n", |
---|
[572] | 455 | __FUNCTION__ ); |
---|
[439] | 456 | boot_exit(); |
---|
| 457 | } |
---|
| 458 | |
---|
| 459 | // keep only external devices |
---|
| 460 | if( (device->type != DEV_TYPE_RAM_SCL) && |
---|
| 461 | (device->type != DEV_TYPE_ICU_XCU) && |
---|
| 462 | (device->type != DEV_TYPE_MMC_TSR) && |
---|
[550] | 463 | (device->type != DEV_TYPE_DMA_SCL) && |
---|
| 464 | (device->type != DEV_TYPE_TXT_MTY) && |
---|
| 465 | (device->type != DEV_TYPE_IOC_SPI) ) |
---|
[439] | 466 | { |
---|
| 467 | boot_dev = &boot_info->ext_dev[device_id]; |
---|
| 468 | |
---|
| 469 | boot_dev->type = device->type; |
---|
| 470 | boot_dev->base = device->base; |
---|
| 471 | boot_dev->channels = device->channels; |
---|
| 472 | boot_dev->param0 = device->arg0; |
---|
| 473 | boot_dev->param1 = device->arg1; |
---|
| 474 | boot_dev->param2 = device->arg2; |
---|
| 475 | boot_dev->param3 = device->arg3; |
---|
| 476 | boot_dev->irqs = device->irqs; |
---|
| 477 | |
---|
| 478 | device_id++; |
---|
| 479 | |
---|
| 480 | #if DEBUG_BOOT_INFO |
---|
| 481 | boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n", |
---|
[572] | 482 | device_type_str(device->type), device->base, device->size, device->channels, device->irqs ); |
---|
[439] | 483 | #endif |
---|
| 484 | } |
---|
| 485 | |
---|
| 486 | // handle IRQs for PIC |
---|
| 487 | if (device->type == DEV_TYPE_PIC_TSR) |
---|
| 488 | { |
---|
| 489 | for (irq_id = 0; irq_id < CONFIG_MAX_EXTERNAL_IRQS ; irq_id++) |
---|
| 490 | { |
---|
| 491 | boot_dev->irq[irq_id].valid = 0; |
---|
| 492 | } |
---|
| 493 | |
---|
| 494 | for (irq = &irq_base[device->irq_offset]; |
---|
| 495 | irq < &irq_base[device->irq_offset + device->irqs]; |
---|
| 496 | irq++) |
---|
| 497 | { |
---|
| 498 | boot_dev->irq[irq->port].valid = 1; |
---|
| 499 | boot_dev->irq[irq->port].dev_type = irq->dev_type; |
---|
| 500 | boot_dev->irq[irq->port].channel = irq->channel; |
---|
| 501 | boot_dev->irq[irq->port].is_rx = irq->is_rx; |
---|
| 502 | |
---|
| 503 | #if DEBUG_BOOT_INFO |
---|
| 504 | boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n", |
---|
[572] | 505 | irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx ); |
---|
[439] | 506 | #endif |
---|
| 507 | } |
---|
| 508 | } |
---|
| 509 | } // end loop on io_cluster peripherals |
---|
| 510 | |
---|
| 511 | // initialize number of external peripherals |
---|
| 512 | boot_info->ext_dev_nr = device_id; |
---|
| 513 | |
---|
| 514 | // Initialize cluster specific resources |
---|
| 515 | boot_info->cxy = my_cluster->cxy; |
---|
| 516 | |
---|
| 517 | #if DEBUG_BOOT_INFO |
---|
| 518 | boot_printf("\n[BOOT INFO] %s : cores in cluster %x\n", __FUNCTION__ , cxy ); |
---|
| 519 | #endif |
---|
| 520 | |
---|
| 521 | //////////////////////////////////////// |
---|
| 522 | // Initialize array of core descriptors |
---|
| 523 | core_id = 0; |
---|
| 524 | for (core = &core_base[my_cluster->core_offset]; |
---|
| 525 | core < &core_base[my_cluster->core_offset + my_cluster->cores]; |
---|
| 526 | core++ ) |
---|
| 527 | { |
---|
| 528 | boot_info->core[core_id].gid = (gid_t)core->gid; |
---|
| 529 | boot_info->core[core_id].lid = (lid_t)core->lid; |
---|
| 530 | boot_info->core[core_id].cxy = (cxy_t)core->cxy; |
---|
| 531 | |
---|
| 532 | #if DEBUG_BOOT_INFO |
---|
| 533 | boot_printf(" - core_gid = %x : cxy = %x / lid = %d\n", |
---|
[572] | 534 | core->gid , core->cxy , core->lid ); |
---|
[439] | 535 | #endif |
---|
| 536 | core_id++; |
---|
| 537 | } |
---|
| 538 | |
---|
| 539 | // Initialize number of cores in my_cluster |
---|
| 540 | boot_info->cores_nr = core_id; |
---|
| 541 | |
---|
| 542 | ////////////////////////////////////////////////////////////////////// |
---|
| 543 | // initialise boot_info array of internal devices (RAM, ICU, MMC, DMA) |
---|
| 544 | |
---|
| 545 | #if DEBUG_BOOT_INFO |
---|
[572] | 546 | boot_printf("\n[BOOT INFO] %s : internal peripherals in cluster %x\n", |
---|
| 547 | __FUNCTION__ , cxy ); |
---|
[439] | 548 | #endif |
---|
| 549 | |
---|
| 550 | device_id = 0; |
---|
| 551 | for (device = &device_base[my_cluster->device_offset]; |
---|
| 552 | device < &device_base[my_cluster->device_offset + my_cluster->devices]; |
---|
| 553 | device++ ) |
---|
| 554 | { |
---|
| 555 | // keep only internal devices |
---|
| 556 | if( (device->type == DEV_TYPE_RAM_SCL) || |
---|
| 557 | (device->type == DEV_TYPE_ICU_XCU) || |
---|
| 558 | (device->type == DEV_TYPE_MMC_TSR) || |
---|
[534] | 559 | (device->type == DEV_TYPE_DMA_SCL) || |
---|
[550] | 560 | (device->type == DEV_TYPE_TXT_MTY) || |
---|
| 561 | (device->type == DEV_TYPE_IOC_SPI) ) |
---|
[439] | 562 | { |
---|
| 563 | if (device->type == DEV_TYPE_RAM_SCL) // RAM |
---|
| 564 | { |
---|
[550] | 565 | // set number of physical memory pages |
---|
[439] | 566 | boot_info->pages_nr = device->size >> CONFIG_PPM_PAGE_SHIFT; |
---|
| 567 | |
---|
| 568 | #if DEBUG_BOOT_INFO |
---|
| 569 | boot_printf(" - RAM : %x pages\n", boot_info->pages_nr ); |
---|
| 570 | #endif |
---|
| 571 | } |
---|
[534] | 572 | else // ICU / MMC / DMA / MTY |
---|
[439] | 573 | { |
---|
| 574 | if( device_id >= CONFIG_MAX_INT_DEV ) |
---|
| 575 | { |
---|
| 576 | boot_printf("\n[ERROR] in %s : too much internal devices in cluster %x\n", |
---|
| 577 | __FUNCTION__ , cxy ); |
---|
| 578 | boot_exit(); |
---|
| 579 | } |
---|
| 580 | |
---|
| 581 | boot_dev = &boot_info->int_dev[device_id]; |
---|
| 582 | |
---|
| 583 | boot_dev->type = device->type; |
---|
| 584 | boot_dev->base = device->base; |
---|
| 585 | boot_dev->channels = device->channels; |
---|
| 586 | boot_dev->param0 = device->arg0; |
---|
| 587 | boot_dev->param1 = device->arg1; |
---|
| 588 | boot_dev->param2 = device->arg2; |
---|
| 589 | boot_dev->param3 = device->arg3; |
---|
| 590 | boot_dev->irqs = device->irqs; |
---|
| 591 | |
---|
| 592 | device_id++; |
---|
| 593 | |
---|
| 594 | #if DEBUG_BOOT_INFO |
---|
| 595 | boot_printf(" - %s : base = %l / size = %l / channels = %d / irqs = %d\n", |
---|
[572] | 596 | device_type_str( device->type ) , device->base , device->size , |
---|
| 597 | device->channels , device->irqs ); |
---|
[439] | 598 | #endif |
---|
| 599 | |
---|
| 600 | // handle IRQs for ICU |
---|
| 601 | if (device->type == DEV_TYPE_ICU_XCU) |
---|
| 602 | { |
---|
| 603 | for (irq_id = 0; irq_id < CONFIG_MAX_INTERNAL_IRQS ; irq_id++) |
---|
| 604 | { |
---|
| 605 | boot_dev->irq[irq_id].valid = 0; |
---|
| 606 | } |
---|
| 607 | |
---|
| 608 | for (irq = &irq_base[device->irq_offset]; |
---|
| 609 | irq < &irq_base[device->irq_offset + device->irqs] ; irq++) |
---|
| 610 | { |
---|
| 611 | boot_dev->irq[irq->port].valid = 1; |
---|
| 612 | boot_dev->irq[irq->port].dev_type = irq->dev_type; |
---|
| 613 | boot_dev->irq[irq->port].channel = irq->channel; |
---|
| 614 | boot_dev->irq[irq->port].is_rx = irq->is_rx; |
---|
| 615 | |
---|
| 616 | #if DEBUG_BOOT_INFO |
---|
| 617 | boot_printf(" . irq_port = %d / source = %s / channel = %d / is_rx = %d\n", |
---|
[572] | 618 | irq->port , device_type_str( irq->dev_type ) , irq->channel , irq->is_rx ); |
---|
[439] | 619 | #endif |
---|
| 620 | |
---|
| 621 | } |
---|
| 622 | } |
---|
| 623 | } |
---|
| 624 | } |
---|
| 625 | } // end loop on local peripherals |
---|
| 626 | |
---|
| 627 | // initialize number of internal peripherals |
---|
| 628 | boot_info->int_dev_nr = device_id; |
---|
| 629 | |
---|
| 630 | // Get the top address of the kernel segments |
---|
| 631 | end = boot_info->kdata_base + boot_info->kdata_size; |
---|
| 632 | |
---|
| 633 | // compute number of physical pages occupied by the kernel code |
---|
| 634 | boot_info->pages_offset = ( (end & CONFIG_PPM_PAGE_MASK) == 0 ) ? |
---|
| 635 | (end >> CONFIG_PPM_PAGE_SHIFT) : (end >> CONFIG_PPM_PAGE_SHIFT) + 1; |
---|
| 636 | |
---|
[572] | 637 | // no reserved zones for TSAR architecture |
---|
[439] | 638 | boot_info->rsvd_nr = 0; |
---|
| 639 | |
---|
| 640 | // set boot_info signature |
---|
| 641 | boot_info->signature = BOOT_INFO_SIGNATURE; |
---|
| 642 | |
---|
| 643 | } // boot_info_init() |
---|
| 644 | |
---|
| 645 | /*********************************************************************************** |
---|
| 646 | * This function check the local boot_info_t structure for a given core. |
---|
| 647 | * @ boot_info : pointer to local 'boot_info_t' structure to be checked. |
---|
| 648 | * @ lid : core local identifier, index the core descriptor table. |
---|
| 649 | **********************************************************************************/ |
---|
| 650 | static void boot_check_core( boot_info_t * boot_info, |
---|
| 651 | lid_t lid) |
---|
| 652 | { |
---|
| 653 | gid_t gid; // global hardware identifier of this core |
---|
| 654 | boot_core_t * this; // BOOT_INFO core descriptor of this core. |
---|
| 655 | |
---|
| 656 | // Get core hardware identifier |
---|
| 657 | gid = (gid_t)boot_get_procid(); |
---|
| 658 | |
---|
| 659 | // get pointer on core descriptor |
---|
| 660 | this = &boot_info->core[lid]; |
---|
| 661 | |
---|
| 662 | if ( (this->gid != gid) || (this->cxy != boot_info->cxy) ) |
---|
| 663 | { |
---|
| 664 | boot_printf("\n[BOOT ERROR] in boot_check_core() :\n" |
---|
| 665 | " - boot_info cxy = %x\n" |
---|
| 666 | " - boot_info lid = %d\n" |
---|
| 667 | " - boot_info gid = %x\n" |
---|
| 668 | " - actual gid = %x\n", |
---|
| 669 | this->cxy , this->lid , this->gid , gid ); |
---|
| 670 | boot_exit(); |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | } // boot_check_core() |
---|
| 674 | |
---|
| 675 | /********************************************************************************* |
---|
| 676 | * This function is called by CP0 in cluster(0,0) to activate all other CP0s. |
---|
| 677 | * It returns the number of CP0s actually activated. |
---|
| 678 | ********************************************************************************/ |
---|
[527] | 679 | static uint32_t boot_wake_all_cp0s( void ) |
---|
[439] | 680 | { |
---|
| 681 | archinfo_header_t* header; // Pointer on ARCHINFO header |
---|
| 682 | archinfo_cluster_t* cluster_base; // Pointer on ARCHINFO clusters base |
---|
| 683 | archinfo_cluster_t* cluster; // Iterator for loop on clusters |
---|
| 684 | archinfo_device_t* device_base; // Pointer on ARCHINFO devices base |
---|
| 685 | archinfo_device_t* device; // Iterator for loop on devices |
---|
| 686 | uint32_t cp0_nb = 0; // CP0s counter |
---|
| 687 | |
---|
| 688 | header = (archinfo_header_t*)ARCHINFO_BASE; |
---|
| 689 | cluster_base = archinfo_get_cluster_base(header); |
---|
| 690 | device_base = archinfo_get_device_base (header); |
---|
| 691 | |
---|
| 692 | // loop on all clusters |
---|
| 693 | for (cluster = cluster_base; |
---|
| 694 | cluster < &cluster_base[header->x_size * header->y_size]; |
---|
| 695 | cluster++) |
---|
| 696 | { |
---|
| 697 | // Skip boot cluster. |
---|
| 698 | if (cluster->cxy == BOOT_CORE_CXY) |
---|
| 699 | continue; |
---|
| 700 | |
---|
| 701 | // Skip clusters without core (thus without CP0). |
---|
| 702 | if (cluster->cores == 0) |
---|
| 703 | continue; |
---|
| 704 | |
---|
| 705 | // Skip clusters without device (thus without XICU). |
---|
| 706 | if (cluster->devices == 0) |
---|
| 707 | continue; |
---|
| 708 | |
---|
| 709 | // search XICU device associated to CP0, and send a WTI to activate it |
---|
| 710 | for (device = &device_base[cluster->device_offset]; |
---|
| 711 | device < &device_base[cluster->device_offset + cluster->devices]; |
---|
| 712 | device++) |
---|
| 713 | { |
---|
| 714 | if (device->type == DEV_TYPE_ICU_XCU) |
---|
| 715 | { |
---|
| 716 | |
---|
| 717 | #if DEBUG_BOOT_WAKUP |
---|
| 718 | boot_printf("\n[BOOT] core[%x,0] activated at cycle %d\n", |
---|
[572] | 719 | cluster->cxy , boot_get_proctime ); |
---|
[439] | 720 | #endif |
---|
| 721 | |
---|
| 722 | boot_remote_sw((xptr_t)device->base, (uint32_t)boot_entry); |
---|
| 723 | cp0_nb++; |
---|
| 724 | } |
---|
| 725 | } |
---|
| 726 | } |
---|
| 727 | return cp0_nb; |
---|
| 728 | |
---|
| 729 | } // boot_wake_cp0() |
---|
| 730 | |
---|
| 731 | /********************************************************************************* |
---|
[623] | 732 | * This function is called by all CP0s to activate the other CPi cores. |
---|
[439] | 733 | * @ boot_info : pointer to local 'boot_info_t' structure. |
---|
| 734 | *********************************************************************************/ |
---|
| 735 | static void boot_wake_local_cores(boot_info_t * boot_info) |
---|
| 736 | { |
---|
| 737 | unsigned int core_id; |
---|
| 738 | |
---|
| 739 | // get pointer on XCU device descriptor in boot_info |
---|
| 740 | boot_device_t * xcu = &boot_info->int_dev[0]; |
---|
| 741 | |
---|
| 742 | // loop on cores |
---|
| 743 | for (core_id = 1; core_id < boot_info->cores_nr; core_id++) |
---|
| 744 | { |
---|
| 745 | |
---|
| 746 | #if DEBUG_BOOT_WAKUP |
---|
| 747 | boot_printf("\n[BOOT] core[%x,%d] activated at cycle %d\n", |
---|
[572] | 748 | boot_info->cxy , core_id , boot_get_proctime() ); |
---|
[439] | 749 | #endif |
---|
| 750 | // send an IPI |
---|
| 751 | boot_remote_sw( (xptr_t)(xcu->base + (core_id << 2)) , (uint32_t)boot_entry ); |
---|
| 752 | } |
---|
| 753 | } // boot_wake_local_cores() |
---|
| 754 | |
---|
[623] | 755 | /********************************************************************************* |
---|
| 756 | * This function is called by all core[cxy][0] to initialize the Boot Page Table: |
---|
| 757 | * map two local big pages for the boot code and kernel code. |
---|
| 758 | * @ cxy : local cluster identifier. |
---|
| 759 | *********************************************************************************/ |
---|
| 760 | void boot_page_table_init( cxy_t cxy ) |
---|
| 761 | { |
---|
| 762 | // set PTE1 in slot[0] for kernel code |
---|
| 763 | uint32_t kernel_attr = 0x8A800000; // flagss : V,C,X,G |
---|
| 764 | uint32_t kernel_ppn1 = (cxy << 20) >> 9; // big physical page index == 0 |
---|
| 765 | boot_pt[0] = kernel_attr | kernel_ppn1; |
---|
[439] | 766 | |
---|
[623] | 767 | // set PTE1 in slot[1] for boot code (no global flag) |
---|
| 768 | uint32_t boot_attr = 0x8A000000; // flags : V,C,X |
---|
| 769 | uint32_t boot_ppn1 = ((cxy << 20) + 512) >> 9; // big physical page index == 1 |
---|
| 770 | boot_pt[1] = boot_attr | boot_ppn1; |
---|
| 771 | } |
---|
| 772 | |
---|
[439] | 773 | /********************************************************************************* |
---|
[623] | 774 | * This function is called by all cores to activate the instruction MMU, |
---|
| 775 | * and use the local copy of boot code. |
---|
| 776 | *********************************************************************************/ |
---|
| 777 | void boot_activate_ins_mmu( cxy_t cxy ) |
---|
| 778 | { |
---|
| 779 | // set mmu_ptpr register |
---|
| 780 | uint32_t ptpr = ((uint32_t)boot_pt >> 13) | (cxy << 19); |
---|
| 781 | asm volatile ( "mtc2 %0, $0 \n" : : "r" (ptpr) ); |
---|
| 782 | |
---|
| 783 | // set ITLB bit in mmu_mode |
---|
| 784 | asm volatile ( "mfc2 $26, $1 \n" |
---|
| 785 | "ori $26, $26, 0x8 \n" |
---|
| 786 | "mtc2 $26, $1 \n" ); |
---|
| 787 | } |
---|
| 788 | |
---|
| 789 | /********************************************************************************* |
---|
[439] | 790 | * This main function of the boot-loader is called by the boot_entry() |
---|
| 791 | * function, and executed by all cores. |
---|
| 792 | * The arguments values are computed by the boot_entry code. |
---|
| 793 | * @ lid : core local identifier, |
---|
| 794 | * @ cxy : cluster identifier, |
---|
| 795 | *********************************************************************************/ |
---|
[524] | 796 | void boot_loader( lid_t lid, |
---|
| 797 | cxy_t cxy ) |
---|
[439] | 798 | { |
---|
| 799 | boot_info_t * boot_info; // pointer on local boot_info_t structure |
---|
| 800 | |
---|
| 801 | if (lid == 0) |
---|
| 802 | { |
---|
[623] | 803 | /************************************i********************** |
---|
| 804 | * PHASE Sequencial : only core[0][0] executes it |
---|
| 805 | **********************************************************/ |
---|
| 806 | if (cxy == 0) |
---|
[439] | 807 | { |
---|
| 808 | boot_printf("\n[BOOT] core[%x,%d] enters at cycle %d\n", |
---|
| 809 | cxy , lid , boot_get_proctime() ); |
---|
| 810 | |
---|
| 811 | // Initialize IOC driver |
---|
| 812 | if (USE_IOC_BDV) boot_bdv_init(); |
---|
| 813 | else if (USE_IOC_HBA) boot_hba_init(); |
---|
| 814 | // else if (USE_IOC_SDC) boot_sdc_init(); |
---|
[572] | 815 | // else if (USE_IOC_SPI) boot_spi_init(); |
---|
[439] | 816 | else if (!USE_IOC_RDK) |
---|
| 817 | { |
---|
| 818 | boot_printf("\n[BOOT ERROR] in %s : no IOC driver\n"); |
---|
| 819 | boot_exit(); |
---|
| 820 | } |
---|
| 821 | |
---|
| 822 | // Initialize FAT32. |
---|
| 823 | boot_fat32_init(); |
---|
| 824 | |
---|
| 825 | // Load the 'kernel.elf' file into memory from IOC, and set |
---|
| 826 | // the global variables defining the kernel layout |
---|
| 827 | boot_kernel_load(); |
---|
| 828 | |
---|
| 829 | boot_printf("\n[BOOT] core[%x,%d] loaded kernel at cycle %d\n", |
---|
[572] | 830 | cxy , lid , boot_get_proctime() ); |
---|
[439] | 831 | |
---|
| 832 | // Load the arch_info.bin file into memory. |
---|
| 833 | boot_archinfo_load(); |
---|
| 834 | |
---|
[572] | 835 | boot_printf("\n[BOOT] core[%x,%d] loaded arch_info at cycle %d\n", |
---|
| 836 | cxy , lid , boot_get_proctime() ); |
---|
| 837 | |
---|
[439] | 838 | // Get local boot_info_t structure base address. |
---|
| 839 | // It is the first structure in the .kdata segment. |
---|
| 840 | boot_info = (boot_info_t *)seg_kdata_base; |
---|
| 841 | |
---|
| 842 | // Initialize local boot_info_t structure. |
---|
| 843 | boot_info_init( boot_info , cxy ); |
---|
| 844 | |
---|
[572] | 845 | boot_printf("\n[BOOT] core[%x,%d] initialised boot_info at cycle %d\n", |
---|
| 846 | cxy , lid , boot_get_proctime() ); |
---|
| 847 | |
---|
[439] | 848 | // check boot_info signature |
---|
| 849 | if (boot_info->signature != BOOT_INFO_SIGNATURE) |
---|
| 850 | { |
---|
| 851 | boot_printf("\n[BOOT ERROR] in %s reported by core[%x,%d]\n" |
---|
[572] | 852 | " illegal boot_info signature / should be %x\n", |
---|
| 853 | __FUNCTION__ , cxy , lid , BOOT_INFO_SIGNATURE ); |
---|
[439] | 854 | boot_exit(); |
---|
| 855 | } |
---|
| 856 | |
---|
| 857 | // Check core information. |
---|
| 858 | boot_check_core(boot_info, lid); |
---|
| 859 | |
---|
[623] | 860 | // TO BE DONE |
---|
| 861 | // core[0][0] identity maps two big pages for the boot and kernel code, |
---|
| 862 | // boot_page_table_init( 0 ); |
---|
[439] | 863 | |
---|
[623] | 864 | // TO BE DONE |
---|
| 865 | // core[0][0] activates the instruction MMU to use the local copy of boot code |
---|
| 866 | // boot_activate_ins_mmu( 0 ); |
---|
| 867 | |
---|
| 868 | // Activate other core[cxy][0] / get number of activated cores |
---|
| 869 | active_cores_nr = boot_wake_all_cp0s() + 1; |
---|
| 870 | |
---|
[439] | 871 | // Wait until all clusters (i.e all CP0s) ready to enter kernel. |
---|
| 872 | boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , |
---|
[623] | 873 | active_cores_nr ); |
---|
[439] | 874 | |
---|
| 875 | // activate other local cores |
---|
| 876 | boot_wake_local_cores( boot_info ); |
---|
| 877 | |
---|
| 878 | // Wait until all local cores in cluster ready |
---|
| 879 | boot_remote_barrier( XPTR( cxy , &local_barrier ) , |
---|
| 880 | boot_info->cores_nr ); |
---|
| 881 | } |
---|
[623] | 882 | /************************************************************************** |
---|
| 883 | * PHASE partially parallel : all core[cxy][0] with (cxy != 0) execute it |
---|
| 884 | **************************************************************************/ |
---|
[439] | 885 | else |
---|
| 886 | { |
---|
[623] | 887 | // at this point, the DATA extension registers point |
---|
| 888 | // already on the local cluster cxy to use the local stack, |
---|
| 889 | // but all cores must access the code stored in cluster 0 |
---|
| 890 | |
---|
| 891 | // Each CP0 copies the boot code (data and instructions) |
---|
| 892 | // from the cluster 0 to the local cluster. |
---|
[439] | 893 | boot_remote_memcpy( XPTR( cxy , BOOT_BASE ), |
---|
| 894 | XPTR( BOOT_CORE_CXY , BOOT_BASE ), |
---|
| 895 | BOOT_MAX_SIZE ); |
---|
| 896 | |
---|
[623] | 897 | // from now, it is safe to refer to the boot global variables |
---|
[439] | 898 | boot_printf("\n[BOOT] core[%x,%d] replicated boot code at cycle %d\n", |
---|
[572] | 899 | cxy , lid , boot_get_proctime() ); |
---|
[439] | 900 | |
---|
[623] | 901 | // TO BE DONE |
---|
| 902 | // Each core identity maps two big pages for the boot and kernel code, |
---|
| 903 | // boot_page_table_init( cxy ); |
---|
[439] | 904 | |
---|
[623] | 905 | // Each core activates the instruction MMU to use the local copy of boot code |
---|
| 906 | // boot_activate_ins_mmu( cxy ); |
---|
| 907 | |
---|
| 908 | // Each CP0 copies the arch_info.bin into the local memory. |
---|
[439] | 909 | boot_remote_memcpy(XPTR(cxy, ARCHINFO_BASE), |
---|
| 910 | XPTR(BOOT_CORE_CXY, ARCHINFO_BASE), |
---|
| 911 | ARCHINFO_MAX_SIZE ); |
---|
| 912 | |
---|
| 913 | boot_printf("\n[BOOT] core[%x,%d] replicated arch_info at cycle %d\n", |
---|
[572] | 914 | cxy , lid , boot_get_proctime() ); |
---|
[439] | 915 | |
---|
[623] | 916 | // Each CP0 copies the kcode segment into local memory |
---|
[439] | 917 | boot_remote_memcpy( XPTR( cxy , seg_kcode_base ), |
---|
| 918 | XPTR( BOOT_CORE_CXY , seg_kcode_base ), |
---|
| 919 | seg_kcode_size ); |
---|
| 920 | |
---|
[623] | 921 | // Each CP0 copies the kdata segment into local memory |
---|
[439] | 922 | boot_remote_memcpy( XPTR( cxy , seg_kdata_base ), |
---|
| 923 | XPTR( BOOT_CORE_CXY , seg_kdata_base ), |
---|
| 924 | seg_kdata_size ); |
---|
| 925 | |
---|
[623] | 926 | // [TO BE REMOVED<D-°> |
---|
| 927 | // Each CP0 copies the kentry segment into local memory |
---|
[439] | 928 | boot_remote_memcpy( XPTR( cxy , seg_kentry_base ), |
---|
| 929 | XPTR( BOOT_CORE_CXY , seg_kentry_base ), |
---|
| 930 | seg_kentry_size ); |
---|
| 931 | |
---|
| 932 | boot_printf("\n[BOOT] core[%x,%d] replicated kernel code at cycle %d\n", |
---|
[572] | 933 | cxy , lid , boot_get_proctime() ); |
---|
[439] | 934 | |
---|
[623] | 935 | // Each CP0 get local boot_info_t structure base address. |
---|
[439] | 936 | boot_info = (boot_info_t*)seg_kdata_base; |
---|
| 937 | |
---|
[623] | 938 | // Each CP0 initializes local boot_info_t structure. |
---|
[439] | 939 | boot_info_init( boot_info , cxy ); |
---|
| 940 | |
---|
[572] | 941 | boot_printf("\n[BOOT] core[%x,%d] initialised boot_info at cycle %d\n", |
---|
| 942 | cxy , lid , boot_get_proctime() ); |
---|
| 943 | |
---|
[623] | 944 | // Each CP0 checks core information. |
---|
[439] | 945 | boot_check_core( boot_info , lid ); |
---|
| 946 | |
---|
[623] | 947 | // Each CP0 get number of active clusters from BOOT_CORE cluster |
---|
| 948 | uint32_t count = boot_remote_lw( XPTR( 0 , &active_cores_nr ) ); |
---|
[439] | 949 | |
---|
[623] | 950 | // Wait until all clusters (i.e all CP0s) ready |
---|
[439] | 951 | boot_remote_barrier( XPTR( BOOT_CORE_CXY , &global_barrier ) , count ); |
---|
| 952 | |
---|
| 953 | // activate other local cores |
---|
| 954 | boot_wake_local_cores( boot_info ); |
---|
| 955 | |
---|
| 956 | // Wait until all local cores in cluster ready |
---|
| 957 | boot_remote_barrier( XPTR( cxy , &local_barrier ) , |
---|
| 958 | boot_info->cores_nr ); |
---|
| 959 | } |
---|
| 960 | } |
---|
| 961 | else |
---|
| 962 | { |
---|
[623] | 963 | /*********************************************************************** |
---|
| 964 | * PHASE fully parallel : all cores[cxy][lid] with (lid! = 0) execute it |
---|
| 965 | **********************************************************************/ |
---|
[439] | 966 | |
---|
[623] | 967 | // TO BE DONE |
---|
| 968 | // each core activate the instruction MMU to use the local copy of the boot code |
---|
| 969 | // boot_activate_ins_mmu( cxy ); |
---|
[439] | 970 | |
---|
| 971 | // Get local boot_info_t structure base address. |
---|
| 972 | boot_info = (boot_info_t *)seg_kdata_base; |
---|
| 973 | |
---|
| 974 | // Check core information |
---|
| 975 | boot_check_core(boot_info, lid); |
---|
| 976 | |
---|
| 977 | // Wait until all local cores in cluster ready |
---|
| 978 | boot_remote_barrier( XPTR( cxy , &local_barrier ) , boot_info->cores_nr ); |
---|
| 979 | } |
---|
| 980 | |
---|
[623] | 981 | // the "kernel_entry" global variable, set by boot_kernel_load() define |
---|
| 982 | // the adress of the kernel_init() function. |
---|
[439] | 983 | // Each core initialise the following registers before jumping to kernel: |
---|
[623] | 984 | // - gr_29 : stack pointer / kernel stack allocated in idle thread descriptor, |
---|
| 985 | // - c0_sr : status register / reset BEV bit |
---|
| 986 | // - gr_04 : kernel_init() argument / pointer on boot_info structure |
---|
| 987 | // - c0_ebase : kentry_base |
---|
[439] | 988 | |
---|
[623] | 989 | // compute "sp" from base address of idle thread descriptors array and lid. |
---|
[439] | 990 | // The array of idle-thread descriptors is allocated in the kdata segment, |
---|
[623] | 991 | // just after the boot_info structure. |
---|
[439] | 992 | uint32_t base; |
---|
| 993 | uint32_t offset = sizeof( boot_info_t ); |
---|
| 994 | uint32_t pmask = CONFIG_PPM_PAGE_MASK; |
---|
| 995 | uint32_t psize = CONFIG_PPM_PAGE_SIZE; |
---|
| 996 | if( offset & pmask ) base = seg_kdata_base + (offset & ~pmask) + psize; |
---|
| 997 | else base = seg_kdata_base + offset; |
---|
[623] | 998 | uint32_t sp = base + ((lid + 1) * CONFIG_THREAD_DESC_SIZE) - 16; |
---|
[439] | 999 | |
---|
[623] | 1000 | // get "ebase" from kerneL_info |
---|
| 1001 | uint32_t ebase = boot_info->kentry_base; |
---|
[439] | 1002 | |
---|
[623] | 1003 | // TO BE DONE |
---|
| 1004 | // The cp0_ebase will not be set by the assenbly code below |
---|
| 1005 | // when the kentry segment will be removed => done in kernel init |
---|
| 1006 | |
---|
[439] | 1007 | asm volatile( "mfc0 $27, $12 \n" |
---|
| 1008 | "lui $26, 0xFFBF \n" |
---|
| 1009 | "ori $26, $26, 0xFFFF \n" |
---|
| 1010 | "and $27, $27, $26 \n" |
---|
| 1011 | "mtc0 $27, $12 \n" |
---|
| 1012 | "move $4, %0 \n" |
---|
| 1013 | "move $29, %1 \n" |
---|
| 1014 | "mtc0 %2, $15, 1 \n" |
---|
| 1015 | "jr %3 \n" |
---|
| 1016 | : |
---|
| 1017 | : "r"(boot_info) , |
---|
| 1018 | "r"(sp) , |
---|
[623] | 1019 | "r"(ebase) , |
---|
[439] | 1020 | "r"(kernel_entry) |
---|
| 1021 | : "$26" , "$27" , "$29" , "$4" ); |
---|
| 1022 | |
---|
| 1023 | |
---|
| 1024 | } // boot_loader() |
---|