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