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 <fdt_support.h>
  14 #include <image.h>
  15 #include <u-boot/zlib.h>
  16 #include <asm/bootparam.h>
  17 #include <asm/byteorder.h>
  18 #include <asm/zimage.h>
  19 #ifdef CONFIG_SYS_COREBOOT
  20 #include <asm/arch/timestamp.h>
  21 #endif
  22
  23 #define COMMAND_LINE_OFFSET 0x9000
  24
  25 /*
  26  * Implement a weak default function for boards that optionally
  27  * need to clean up the system before jumping to the kernel.
  28  */
  29 __weak void board_final_cleanup(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         board_final_cleanup();
  45 }
  46
  47 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
  48 int arch_fixup_memory_node(void *blob)
  49 {
  50         bd_t    *bd = gd->bd;
  51         int bank;
  52         u64 start[CONFIG_NR_DRAM_BANKS];
  53         u64 size[CONFIG_NR_DRAM_BANKS];
  54
  55         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
  56                 start[bank] = bd->bi_dram[bank].start;
  57                 size[bank] = bd->bi_dram[bank].size;
  58         }
  59
  60         return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
  61 }
  62 #endif
  63
  64 /* Subcommand: PREP */
  65 static int boot_prep_linux(bootm_headers_t *images)
  66 {
  67         char *cmd_line_dest = NULL;
  68         image_header_t *hdr;
  69         int is_zimage = 0;
  70         void *data = NULL;
  71         size_t len;
  72         int ret;
  73
  74 #ifdef CONFIG_OF_LIBFDT
  75         if (images->ft_len) {
  76                 debug("using: FDT\n");
  77                 if (image_setup_linux(images)) {
  78                         puts("FDT creation failed! hanging...");
  79                         hang();
  80                 }
  81         }
  82 #endif
  83         if (images->legacy_hdr_valid) {
  84                 hdr = images->legacy_hdr_os;
  85                 if (image_check_type(hdr, IH_TYPE_MULTI)) {
  86                         ulong os_data, os_len;
  87
  88                         /* if multi-part image, we need to get first subimage */
  89                         image_multi_getimg(hdr, 0, &os_data, &os_len);
  90                         data = (void *)os_data;
  91                         len = os_len;
  92                 } else {
  93                         /* otherwise get image data */
  94                         data = (void *)image_get_data(hdr);
  95                         len = image_get_data_size(hdr);
  96                 }
  97                 is_zimage = 1;
  98 #if defined(CONFIG_FIT)
  99         } else if (images->fit_uname_os && is_zimage) {
 100                 ret = fit_image_get_data(images->fit_hdr_os,
 101                                 images->fit_noffset_os,
 102                                 (const void **)&data, &len);
 103                 if (ret) {
 104                         puts("Can't get image data/size!\n");
 105                         goto error;
 106                 }
 107                 is_zimage = 1;
 108 #endif
 109         }
 110
 111         if (is_zimage) {
 112                 void *load_address;
 113                 char *base_ptr;
 114
 115                 base_ptr = (char *)load_zimage(data, len, &load_address);
 116                 images->os.load = (ulong)load_address;
 117                 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
 118                 images->ep = (ulong)base_ptr;
 119         } else if (images->ep) {
 120                 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
 121         } else {
 122                 printf("## Kernel loading failed (no setup) ...\n");
 123                 goto error;
 124         }
 125
 126         printf("Setup at %#08lx\n", images->ep);
 127         ret = setup_zimage((void *)images->ep, cmd_line_dest,
 128                         0, images->rd_start,
 129                         images->rd_end - images->rd_start);
 130
 131         if (ret) {
 132                 printf("## Setting up boot parameters failed ...\n");
 133                 return 1;
 134         }
 135
 136         return 0;
 137
 138 error:
 139         return 1;
 140 }
 141
 142 /* Subcommand: GO */
 143 static int boot_jump_linux(bootm_headers_t *images)
 144 {
 145         debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
 146               images->ep, images->os.load);
 147
 148         boot_zimage((struct boot_params *)images->ep, (void *)images->os.load);
 149         /* does not return */
 150
 151         return 1;
 152 }
 153
 154 int do_bootm_linux(int flag, int argc, char * const argv[],
 155                 bootm_headers_t *images)
 156 {
 157         /* No need for those on x86 */
 158         if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
 159                 return -1;
 160
 161         if (flag & BOOTM_STATE_OS_PREP)
 162                 return boot_prep_linux(images);
 163
 164         if (flag & BOOTM_STATE_OS_GO) {
 165                 boot_jump_linux(images);
 166                 return 0;
 167         }
 168
 169         return boot_jump_linux(images);
 170 }