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 int arch_fixup_fdt(void *blob) 30 { 31 return 0; 32 } 33 34 __weak void board_quiesce_devices(void) 35 { 36 } 37 38 void bootm_announce_and_cleanup(void) 39 { 40 printf("\nStarting kernel ...\n\n"); 41 42 #ifdef CONFIG_SYS_COREBOOT 43 timestamp_add_now(TS_U_BOOT_START_KERNEL); 44 #endif 45 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 46 #ifdef CONFIG_BOOTSTAGE_REPORT 47 bootstage_report(); 48 #endif 49 } 50 51 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL) 52 int arch_fixup_memory_node(void *blob) 53 { 54 bd_t *bd = gd->bd; 55 int bank; 56 u64 start[CONFIG_NR_DRAM_BANKS]; 57 u64 size[CONFIG_NR_DRAM_BANKS]; 58 59 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 60 start[bank] = bd->bi_dram[bank].start; 61 size[bank] = bd->bi_dram[bank].size; 62 } 63 64 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS); 65 } 66 #endif 67 68 /* Subcommand: PREP */ 69 static int boot_prep_linux(bootm_headers_t *images) 70 { 71 char *cmd_line_dest = NULL; 72 image_header_t *hdr; 73 int is_zimage = 0; 74 void *data = NULL; 75 size_t len; 76 int ret; 77 78 #ifdef CONFIG_OF_LIBFDT 79 if (images->ft_len) { 80 debug("using: FDT\n"); 81 if (image_setup_linux(images)) { 82 puts("FDT creation failed! hanging..."); 83 hang(); 84 } 85 } 86 #endif 87 if (images->legacy_hdr_valid) { 88 hdr = images->legacy_hdr_os; 89 if (image_check_type(hdr, IH_TYPE_MULTI)) { 90 ulong os_data, os_len; 91 92 /* if multi-part image, we need to get first subimage */ 93 image_multi_getimg(hdr, 0, &os_data, &os_len); 94 data = (void *)os_data; 95 len = os_len; 96 } else { 97 /* otherwise get image data */ 98 data = (void *)image_get_data(hdr); 99 len = image_get_data_size(hdr); 100 } 101 is_zimage = 1; 102 #if defined(CONFIG_FIT) 103 } else if (images->fit_uname_os && is_zimage) { 104 ret = fit_image_get_data(images->fit_hdr_os, 105 images->fit_noffset_os, 106 (const void **)&data, &len); 107 if (ret) { 108 puts("Can't get image data/size!\n"); 109 goto error; 110 } 111 is_zimage = 1; 112 #endif 113 } 114 115 if (is_zimage) { 116 ulong load_address; 117 char *base_ptr; 118 119 base_ptr = (char *)load_zimage(data, len, &load_address); 120 images->os.load = load_address; 121 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET; 122 images->ep = (ulong)base_ptr; 123 } else if (images->ep) { 124 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET; 125 } else { 126 printf("## Kernel loading failed (missing x86 kernel setup) ...\n"); 127 goto error; 128 } 129 130 printf("Setup at %#08lx\n", images->ep); 131 ret = setup_zimage((void *)images->ep, cmd_line_dest, 132 0, images->rd_start, 133 images->rd_end - images->rd_start); 134 135 if (ret) { 136 printf("## Setting up boot parameters failed ...\n"); 137 return 1; 138 } 139 140 return 0; 141 142 error: 143 return 1; 144 } 145 146 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit) 147 { 148 bootm_announce_and_cleanup(); 149 150 #ifdef CONFIG_SYS_COREBOOT 151 timestamp_add_now(TS_U_BOOT_START_KERNEL); 152 #endif 153 if (image_64bit) { 154 if (!cpu_has_64bit()) { 155 puts("Cannot boot 64-bit kernel on 32-bit machine\n"); 156 return -EFAULT; 157 } 158 return cpu_jump_to_64bit(setup_base, load_address); 159 } else { 160 /* 161 * Set %ebx, %ebp, and %edi to 0, %esi to point to the 162 * boot_params structure, and then jump to the kernel. We 163 * assume that %cs is 0x10, 4GB flat, and read/execute, and 164 * the data segments are 0x18, 4GB flat, and read/write. 165 * U-Boot is setting them up that way for itself in 166 * arch/i386/cpu/cpu.c. 167 * 168 * Note that we cannot currently boot a kernel while running as 169 * an EFI application. Please use the payload option for that. 170 */ 171 #ifndef CONFIG_EFI_APP 172 __asm__ __volatile__ ( 173 "movl $0, %%ebp\n" 174 "cli\n" 175 "jmp *%[kernel_entry]\n" 176 :: [kernel_entry]"a"(load_address), 177 [boot_params] "S"(setup_base), 178 "b"(0), "D"(0) 179 ); 180 #endif 181 } 182 183 /* We can't get to here */ 184 return -EFAULT; 185 } 186 187 /* Subcommand: GO */ 188 static int boot_jump_linux(bootm_headers_t *images) 189 { 190 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n", 191 images->ep, images->os.load); 192 193 return boot_linux_kernel(images->ep, images->os.load, 194 images->os.arch == IH_ARCH_X86_64); 195 } 196 197 int do_bootm_linux(int flag, int argc, char * const argv[], 198 bootm_headers_t *images) 199 { 200 /* No need for those on x86 */ 201 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 202 return -1; 203 204 if (flag & BOOTM_STATE_OS_PREP) 205 return boot_prep_linux(images); 206 207 if (flag & BOOTM_STATE_OS_GO) 208 return boot_jump_linux(images); 209 210 return boot_jump_linux(images); 211 } 212