1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2002 4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 5 * Marius Groeger <mgroeger@sysgo.de> 6 * 7 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) 8 */ 9 10 #include <common.h> 11 #include <command.h> 12 #include <dm/device.h> 13 #include <dm/root.h> 14 #include <errno.h> 15 #include <fdt_support.h> 16 #include <image.h> 17 #include <u-boot/zlib.h> 18 #include <asm/bootparam.h> 19 #include <asm/cpu.h> 20 #include <asm/byteorder.h> 21 #include <asm/zimage.h> 22 #ifdef CONFIG_SYS_COREBOOT 23 #include <asm/arch/timestamp.h> 24 #endif 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 #define COMMAND_LINE_OFFSET 0x9000 29 30 void bootm_announce_and_cleanup(void) 31 { 32 printf("\nStarting kernel ...\n\n"); 33 34 #ifdef CONFIG_SYS_COREBOOT 35 timestamp_add_now(TS_U_BOOT_START_KERNEL); 36 #endif 37 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 38 #ifdef CONFIG_BOOTSTAGE_REPORT 39 bootstage_report(); 40 #endif 41 42 /* 43 * Call remove function of all devices with a removal flag set. 44 * This may be useful for last-stage operations, like cancelling 45 * of DMA operation or releasing device internal buffers. 46 */ 47 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); 48 } 49 50 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL) 51 int arch_fixup_memory_node(void *blob) 52 { 53 bd_t *bd = gd->bd; 54 int bank; 55 u64 start[CONFIG_NR_DRAM_BANKS]; 56 u64 size[CONFIG_NR_DRAM_BANKS]; 57 58 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 59 start[bank] = bd->bi_dram[bank].start; 60 size[bank] = bd->bi_dram[bank].size; 61 } 62 63 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS); 64 } 65 #endif 66 67 /* Subcommand: PREP */ 68 static int boot_prep_linux(bootm_headers_t *images) 69 { 70 char *cmd_line_dest = NULL; 71 image_header_t *hdr; 72 int is_zimage = 0; 73 void *data = NULL; 74 size_t len; 75 int ret; 76 77 #ifdef CONFIG_OF_LIBFDT 78 if (images->ft_len) { 79 debug("using: FDT\n"); 80 if (image_setup_linux(images)) { 81 puts("FDT creation failed! hanging..."); 82 hang(); 83 } 84 } 85 #endif 86 if (images->legacy_hdr_valid) { 87 hdr = images->legacy_hdr_os; 88 if (image_check_type(hdr, IH_TYPE_MULTI)) { 89 ulong os_data, os_len; 90 91 /* if multi-part image, we need to get first subimage */ 92 image_multi_getimg(hdr, 0, &os_data, &os_len); 93 data = (void *)os_data; 94 len = os_len; 95 } else { 96 /* otherwise get image data */ 97 data = (void *)image_get_data(hdr); 98 len = image_get_data_size(hdr); 99 } 100 is_zimage = 1; 101 #if defined(CONFIG_FIT) 102 } else if (images->fit_uname_os && is_zimage) { 103 ret = fit_image_get_data(images->fit_hdr_os, 104 images->fit_noffset_os, 105 (const void **)&data, &len); 106 if (ret) { 107 puts("Can't get image data/size!\n"); 108 goto error; 109 } 110 is_zimage = 1; 111 #endif 112 } 113 114 if (is_zimage) { 115 ulong load_address; 116 char *base_ptr; 117 118 base_ptr = (char *)load_zimage(data, len, &load_address); 119 if (!base_ptr) { 120 puts("## Kernel loading failed ...\n"); 121 goto error; 122 } 123 images->os.load = load_address; 124 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET; 125 images->ep = (ulong)base_ptr; 126 } else if (images->ep) { 127 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET; 128 } else { 129 printf("## Kernel loading failed (missing x86 kernel setup) ...\n"); 130 goto error; 131 } 132 133 printf("Setup at %#08lx\n", images->ep); 134 ret = setup_zimage((void *)images->ep, cmd_line_dest, 135 0, images->rd_start, 136 images->rd_end - images->rd_start); 137 138 if (ret) { 139 printf("## Setting up boot parameters failed ...\n"); 140 return 1; 141 } 142 143 return 0; 144 145 error: 146 return 1; 147 } 148 149 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit) 150 { 151 bootm_announce_and_cleanup(); 152 153 #ifdef CONFIG_SYS_COREBOOT 154 timestamp_add_now(TS_U_BOOT_START_KERNEL); 155 #endif 156 if (image_64bit) { 157 if (!cpu_has_64bit()) { 158 puts("Cannot boot 64-bit kernel on 32-bit machine\n"); 159 return -EFAULT; 160 } 161 /* At present 64-bit U-Boot does not support booting a 162 * kernel. 163 * TODO(sjg@chromium.org): Support booting both 32-bit and 164 * 64-bit kernels from 64-bit U-Boot. 165 */ 166 #if !CONFIG_IS_ENABLED(X86_64) 167 return cpu_jump_to_64bit(setup_base, load_address); 168 #endif 169 } else { 170 /* 171 * Set %ebx, %ebp, and %edi to 0, %esi to point to the 172 * boot_params structure, and then jump to the kernel. We 173 * assume that %cs is 0x10, 4GB flat, and read/execute, and 174 * the data segments are 0x18, 4GB flat, and read/write. 175 * U-Boot is setting them up that way for itself in 176 * arch/i386/cpu/cpu.c. 177 * 178 * Note that we cannot currently boot a kernel while running as 179 * an EFI application. Please use the payload option for that. 180 */ 181 #ifndef CONFIG_EFI_APP 182 __asm__ __volatile__ ( 183 "movl $0, %%ebp\n" 184 "cli\n" 185 "jmp *%[kernel_entry]\n" 186 :: [kernel_entry]"a"(load_address), 187 [boot_params] "S"(setup_base), 188 "b"(0), "D"(0) 189 ); 190 #endif 191 } 192 193 /* We can't get to here */ 194 return -EFAULT; 195 } 196 197 /* Subcommand: GO */ 198 static int boot_jump_linux(bootm_headers_t *images) 199 { 200 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n", 201 images->ep, images->os.load); 202 203 return boot_linux_kernel(images->ep, images->os.load, 204 images->os.arch == IH_ARCH_X86_64); 205 } 206 207 int do_bootm_linux(int flag, int argc, char * const argv[], 208 bootm_headers_t *images) 209 { 210 /* No need for those on x86 */ 211 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 212 return -1; 213 214 if (flag & BOOTM_STATE_OS_PREP) 215 return boot_prep_linux(images); 216 217 if (flag & BOOTM_STATE_OS_GO) 218 return boot_jump_linux(images); 219 220 return boot_jump_linux(images); 221 } 222