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