arch/x86/lib/bootm.c

   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 }