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