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 __weak void board_quiesce_devices(void) 31 { 32 } 33 34 void bootm_announce_and_cleanup(void) 35 { 36 printf("\nStarting kernel ...\n\n"); 37 38 #ifdef CONFIG_SYS_COREBOOT 39 timestamp_add_now(TS_U_BOOT_START_KERNEL); 40 #endif 41 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 42 #ifdef CONFIG_BOOTSTAGE_REPORT 43 bootstage_report(); 44 #endif 45 46 /* 47 * Call remove function of all devices with a removal flag set. 48 * This may be useful for last-stage operations, like cancelling 49 * of DMA operation or releasing device internal buffers. 50 */ 51 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); 52 } 53 54 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL) 55 int arch_fixup_memory_node(void *blob) 56 { 57 bd_t *bd = gd->bd; 58 int bank; 59 u64 start[CONFIG_NR_DRAM_BANKS]; 60 u64 size[CONFIG_NR_DRAM_BANKS]; 61 62 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 63 start[bank] = bd->bi_dram[bank].start; 64 size[bank] = bd->bi_dram[bank].size; 65 } 66 67 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS); 68 } 69 #endif 70 71 /* Subcommand: PREP */ 72 static int boot_prep_linux(bootm_headers_t *images) 73 { 74 char *cmd_line_dest = NULL; 75 image_header_t *hdr; 76 int is_zimage = 0; 77 void *data = NULL; 78 size_t len; 79 int ret; 80 81 #ifdef CONFIG_OF_LIBFDT 82 if (images->ft_len) { 83 debug("using: FDT\n"); 84 if (image_setup_linux(images)) { 85 puts("FDT creation failed! hanging..."); 86 hang(); 87 } 88 } 89 #endif 90 if (images->legacy_hdr_valid) { 91 hdr = images->legacy_hdr_os; 92 if (image_check_type(hdr, IH_TYPE_MULTI)) { 93 ulong os_data, os_len; 94 95 /* if multi-part image, we need to get first subimage */ 96 image_multi_getimg(hdr, 0, &os_data, &os_len); 97 data = (void *)os_data; 98 len = os_len; 99 } else { 100 /* otherwise get image data */ 101 data = (void *)image_get_data(hdr); 102 len = image_get_data_size(hdr); 103 } 104 is_zimage = 1; 105 #if defined(CONFIG_FIT) 106 } else if (images->fit_uname_os && is_zimage) { 107 ret = fit_image_get_data(images->fit_hdr_os, 108 images->fit_noffset_os, 109 (const void **)&data, &len); 110 if (ret) { 111 puts("Can't get image data/size!\n"); 112 goto error; 113 } 114 is_zimage = 1; 115 #endif 116 } 117 118 if (is_zimage) { 119 ulong load_address; 120 char *base_ptr; 121 122 base_ptr = (char *)load_zimage(data, len, &load_address); 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