1 /* 2 * (C) Copyright 2002 3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 4 * Marius Groeger <mgroeger@sysgo.de> 5 * 6 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <command.h> 13 #include <errno.h> 14 #include <fdt_support.h> 15 #include <image.h> 16 #include <u-boot/zlib.h> 17 #include <asm/bootparam.h> 18 #include <asm/cpu.h> 19 #include <asm/byteorder.h> 20 #include <asm/zimage.h> 21 #ifdef CONFIG_SYS_COREBOOT 22 #include <asm/arch/timestamp.h> 23 #endif 24 25 DECLARE_GLOBAL_DATA_PTR; 26 27 #define COMMAND_LINE_OFFSET 0x9000 28 29 __weak void board_quiesce_devices(void) 30 { 31 } 32 33 void bootm_announce_and_cleanup(void) 34 { 35 printf("\nStarting kernel ...\n\n"); 36 37 #ifdef CONFIG_SYS_COREBOOT 38 timestamp_add_now(TS_U_BOOT_START_KERNEL); 39 #endif 40 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 41 #ifdef CONFIG_BOOTSTAGE_REPORT 42 bootstage_report(); 43 #endif 44 } 45 46 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL) 47 int arch_fixup_memory_node(void *blob) 48 { 49 bd_t *bd = gd->bd; 50 int bank; 51 u64 start[CONFIG_NR_DRAM_BANKS]; 52 u64 size[CONFIG_NR_DRAM_BANKS]; 53 54 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 55 start[bank] = bd->bi_dram[bank].start; 56 size[bank] = bd->bi_dram[bank].size; 57 } 58 59 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS); 60 } 61 #endif 62 63 /* Subcommand: PREP */ 64 static int boot_prep_linux(bootm_headers_t *images) 65 { 66 char *cmd_line_dest = NULL; 67 image_header_t *hdr; 68 int is_zimage = 0; 69 void *data = NULL; 70 size_t len; 71 int ret; 72 73 #ifdef CONFIG_OF_LIBFDT 74 if (images->ft_len) { 75 debug("using: FDT\n"); 76 if (image_setup_linux(images)) { 77 puts("FDT creation failed! hanging..."); 78 hang(); 79 } 80 } 81 #endif 82 if (images->legacy_hdr_valid) { 83 hdr = images->legacy_hdr_os; 84 if (image_check_type(hdr, IH_TYPE_MULTI)) { 85 ulong os_data, os_len; 86 87 /* if multi-part image, we need to get first subimage */ 88 image_multi_getimg(hdr, 0, &os_data, &os_len); 89 data = (void *)os_data; 90 len = os_len; 91 } else { 92 /* otherwise get image data */ 93 data = (void *)image_get_data(hdr); 94 len = image_get_data_size(hdr); 95 } 96 is_zimage = 1; 97 #if defined(CONFIG_FIT) 98 } else if (images->fit_uname_os && is_zimage) { 99 ret = fit_image_get_data(images->fit_hdr_os, 100 images->fit_noffset_os, 101 (const void **)&data, &len); 102 if (ret) { 103 puts("Can't get image data/size!\n"); 104 goto error; 105 } 106 is_zimage = 1; 107 #endif 108 } 109 110 if (is_zimage) { 111 ulong load_address; 112 char *base_ptr; 113 114 base_ptr = (char *)load_zimage(data, len, &load_address); 115 images->os.load = load_address; 116 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET; 117 images->ep = (ulong)base_ptr; 118 } else if (images->ep) { 119 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET; 120 } else { 121 printf("## Kernel loading failed (missing x86 kernel setup) ...\n"); 122 goto error; 123 } 124 125 printf("Setup at %#08lx\n", images->ep); 126 ret = setup_zimage((void *)images->ep, cmd_line_dest, 127 0, images->rd_start, 128 images->rd_end - images->rd_start); 129 130 if (ret) { 131 printf("## Setting up boot parameters failed ...\n"); 132 return 1; 133 } 134 135 return 0; 136 137 error: 138 return 1; 139 } 140 141 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit) 142 { 143 bootm_announce_and_cleanup(); 144 145 #ifdef CONFIG_SYS_COREBOOT 146 timestamp_add_now(TS_U_BOOT_START_KERNEL); 147 #endif 148 if (image_64bit) { 149 if (!cpu_has_64bit()) { 150 puts("Cannot boot 64-bit kernel on 32-bit machine\n"); 151 return -EFAULT; 152 } 153 return cpu_jump_to_64bit(setup_base, load_address); 154 } else { 155 /* 156 * Set %ebx, %ebp, and %edi to 0, %esi to point to the 157 * boot_params structure, and then jump to the kernel. We 158 * assume that %cs is 0x10, 4GB flat, and read/execute, and 159 * the data segments are 0x18, 4GB flat, and read/write. 160 * U-Boot is setting them up that way for itself in 161 * arch/i386/cpu/cpu.c. 162 * 163 * Note that we cannot currently boot a kernel while running as 164 * an EFI application. Please use the payload option for that. 165 */ 166 #ifndef CONFIG_EFI_APP 167 __asm__ __volatile__ ( 168 "movl $0, %%ebp\n" 169 "cli\n" 170 "jmp *%[kernel_entry]\n" 171 :: [kernel_entry]"a"(load_address), 172 [boot_params] "S"(setup_base), 173 "b"(0), "D"(0) 174 ); 175 #endif 176 } 177 178 /* We can't get to here */ 179 return -EFAULT; 180 } 181 182 /* Subcommand: GO */ 183 static int boot_jump_linux(bootm_headers_t *images) 184 { 185 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n", 186 images->ep, images->os.load); 187 188 return boot_linux_kernel(images->ep, images->os.load, 189 images->os.arch == IH_ARCH_X86_64); 190 } 191 192 int do_bootm_linux(int flag, int argc, char * const argv[], 193 bootm_headers_t *images) 194 { 195 /* No need for those on x86 */ 196 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 197 return -1; 198 199 if (flag & BOOTM_STATE_OS_PREP) 200 return boot_prep_linux(images); 201 202 if (flag & BOOTM_STATE_OS_GO) 203 return boot_jump_linux(images); 204 205 return boot_jump_linux(images); 206 } 207