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 <dm/device.h> 14 #include <dm/root.h> 15 #include <errno.h> 16 #include <fdt_support.h> 17 #include <image.h> 18 #include <u-boot/zlib.h> 19 #include <asm/bootparam.h> 20 #include <asm/cpu.h> 21 #include <asm/byteorder.h> 22 #include <asm/zimage.h> 23 #ifdef CONFIG_SYS_COREBOOT 24 #include <asm/arch/timestamp.h> 25 #endif 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 #define COMMAND_LINE_OFFSET 0x9000 30 31 int arch_fixup_fdt(void *blob) 32 { 33 return 0; 34 } 35 36 __weak void board_quiesce_devices(void) 37 { 38 } 39 40 void bootm_announce_and_cleanup(void) 41 { 42 printf("\nStarting kernel ...\n\n"); 43 44 #ifdef CONFIG_SYS_COREBOOT 45 timestamp_add_now(TS_U_BOOT_START_KERNEL); 46 #endif 47 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 48 #ifdef CONFIG_BOOTSTAGE_REPORT 49 bootstage_report(); 50 #endif 51 52 /* 53 * Call remove function of all devices with a removal flag set. 54 * This may be useful for last-stage operations, like cancelling 55 * of DMA operation or releasing device internal buffers. 56 */ 57 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); 58 } 59 60 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL) 61 int arch_fixup_memory_node(void *blob) 62 { 63 bd_t *bd = gd->bd; 64 int bank; 65 u64 start[CONFIG_NR_DRAM_BANKS]; 66 u64 size[CONFIG_NR_DRAM_BANKS]; 67 68 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 69 start[bank] = bd->bi_dram[bank].start; 70 size[bank] = bd->bi_dram[bank].size; 71 } 72 73 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS); 74 } 75 #endif 76 77 /* Subcommand: PREP */ 78 static int boot_prep_linux(bootm_headers_t *images) 79 { 80 char *cmd_line_dest = NULL; 81 image_header_t *hdr; 82 int is_zimage = 0; 83 void *data = NULL; 84 size_t len; 85 int ret; 86 87 #ifdef CONFIG_OF_LIBFDT 88 if (images->ft_len) { 89 debug("using: FDT\n"); 90 if (image_setup_linux(images)) { 91 puts("FDT creation failed! hanging..."); 92 hang(); 93 } 94 } 95 #endif 96 if (images->legacy_hdr_valid) { 97 hdr = images->legacy_hdr_os; 98 if (image_check_type(hdr, IH_TYPE_MULTI)) { 99 ulong os_data, os_len; 100 101 /* if multi-part image, we need to get first subimage */ 102 image_multi_getimg(hdr, 0, &os_data, &os_len); 103 data = (void *)os_data; 104 len = os_len; 105 } else { 106 /* otherwise get image data */ 107 data = (void *)image_get_data(hdr); 108 len = image_get_data_size(hdr); 109 } 110 is_zimage = 1; 111 #if defined(CONFIG_FIT) 112 } else if (images->fit_uname_os && is_zimage) { 113 ret = fit_image_get_data(images->fit_hdr_os, 114 images->fit_noffset_os, 115 (const void **)&data, &len); 116 if (ret) { 117 puts("Can't get image data/size!\n"); 118 goto error; 119 } 120 is_zimage = 1; 121 #endif 122 } 123 124 if (is_zimage) { 125 ulong load_address; 126 char *base_ptr; 127 128 base_ptr = (char *)load_zimage(data, len, &load_address); 129 images->os.load = load_address; 130 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET; 131 images->ep = (ulong)base_ptr; 132 } else if (images->ep) { 133 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET; 134 } else { 135 printf("## Kernel loading failed (missing x86 kernel setup) ...\n"); 136 goto error; 137 } 138 139 printf("Setup at %#08lx\n", images->ep); 140 ret = setup_zimage((void *)images->ep, cmd_line_dest, 141 0, images->rd_start, 142 images->rd_end - images->rd_start); 143 144 if (ret) { 145 printf("## Setting up boot parameters failed ...\n"); 146 return 1; 147 } 148 149 return 0; 150 151 error: 152 return 1; 153 } 154 155 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit) 156 { 157 bootm_announce_and_cleanup(); 158 159 #ifdef CONFIG_SYS_COREBOOT 160 timestamp_add_now(TS_U_BOOT_START_KERNEL); 161 #endif 162 if (image_64bit) { 163 if (!cpu_has_64bit()) { 164 puts("Cannot boot 64-bit kernel on 32-bit machine\n"); 165 return -EFAULT; 166 } 167 /* At present 64-bit U-Boot does not support booting a 168 * kernel. 169 * TODO(sjg@chromium.org): Support booting both 32-bit and 170 * 64-bit kernels from 64-bit U-Boot. 171 */ 172 #if !CONFIG_IS_ENABLED(X86_64) 173 return cpu_jump_to_64bit(setup_base, load_address); 174 #endif 175 } else { 176 /* 177 * Set %ebx, %ebp, and %edi to 0, %esi to point to the 178 * boot_params structure, and then jump to the kernel. We 179 * assume that %cs is 0x10, 4GB flat, and read/execute, and 180 * the data segments are 0x18, 4GB flat, and read/write. 181 * U-Boot is setting them up that way for itself in 182 * arch/i386/cpu/cpu.c. 183 * 184 * Note that we cannot currently boot a kernel while running as 185 * an EFI application. Please use the payload option for that. 186 */ 187 #ifndef CONFIG_EFI_APP 188 __asm__ __volatile__ ( 189 "movl $0, %%ebp\n" 190 "cli\n" 191 "jmp *%[kernel_entry]\n" 192 :: [kernel_entry]"a"(load_address), 193 [boot_params] "S"(setup_base), 194 "b"(0), "D"(0) 195 ); 196 #endif 197 } 198 199 /* We can't get to here */ 200 return -EFAULT; 201 } 202 203 /* Subcommand: GO */ 204 static int boot_jump_linux(bootm_headers_t *images) 205 { 206 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n", 207 images->ep, images->os.load); 208 209 return boot_linux_kernel(images->ep, images->os.load, 210 images->os.arch == IH_ARCH_X86_64); 211 } 212 213 int do_bootm_linux(int flag, int argc, char * const argv[], 214 bootm_headers_t *images) 215 { 216 /* No need for those on x86 */ 217 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE) 218 return -1; 219 220 if (flag & BOOTM_STATE_OS_PREP) 221 return boot_prep_linux(images); 222 223 if (flag & BOOTM_STATE_OS_GO) 224 return boot_jump_linux(images); 225 226 return boot_jump_linux(images); 227 } 228