cmd/elf.c

   1 // SPDX-License-Identifier: BSD-2-Clause
   2 /*
   3  * Copyright (c) 2001 William L. Pitts
   4  * All rights reserved.
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <cpu_func.h>
  10 #include <elf.h>
  11 #include <env.h>
  12 #include <image.h>
  13 #include <net.h>
  14 #include <vxworks.h>
  15 #ifdef CONFIG_X86
  16 #include <vbe.h>
  17 #include <asm/cache.h>
  18 #include <asm/e820.h>
  19 #include <linux/linkage.h>
  20 #endif
  21
  22 /* Allow ports to override the default behavior */
  23 static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
  24                                      int argc, char * const argv[])
  25 {
  26         unsigned long ret;
  27
  28         /*
  29          * pass address parameter as argv[0] (aka command name),
  30          * and all remaining args
  31          */
  32         ret = entry(argc, argv);
  33
  34         return ret;
  35 }
  36
  37 /* Interpreter command to boot an arbitrary ELF image from memory */
  38 int do_bootelf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  39 {
  40         unsigned long addr; /* Address of the ELF image */
  41         unsigned long rc; /* Return value from user code */
  42         char *sload = NULL;
  43         const char *ep = env_get("autostart");
  44         int rcode = 0;
  45
  46         /* Consume 'bootelf' */
  47         argc--; argv++;
  48
  49         /* Check for flag. */
  50         if (argc >= 1 && (argv[0][0] == '-' && \
  51                                 (argv[0][1] == 'p' || argv[0][1] == 's'))) {
  52                 sload = argv[0];
  53                 /* Consume flag. */
  54                 argc--; argv++;
  55         }
  56         /* Check for address. */
  57         if (argc >= 1 && strict_strtoul(argv[0], 16, &addr) != -EINVAL) {
  58                 /* Consume address */
  59                 argc--; argv++;
  60         } else
  61                 addr = image_load_addr;
  62
  63         if (!valid_elf_image(addr))
  64                 return 1;
  65
  66         if (sload && sload[1] == 'p')
  67                 addr = load_elf_image_phdr(addr);
  68         else
  69                 addr = load_elf_image_shdr(addr);
  70
  71         if (ep && !strcmp(ep, "no"))
  72                 return rcode;
  73
  74         printf("## Starting application at 0x%08lx ...\n", addr);
  75
  76         /*
  77          * pass address parameter as argv[0] (aka command name),
  78          * and all remaining args
  79          */
  80         rc = do_bootelf_exec((void *)addr, argc, argv);
  81         if (rc != 0)
  82                 rcode = 1;
  83
  84         printf("## Application terminated, rc = 0x%lx\n", rc);
  85
  86         return rcode;
  87 }
  88
  89 /*
  90  * Interpreter command to boot VxWorks from a memory image.  The image can
  91  * be either an ELF image or a raw binary.  Will attempt to setup the
  92  * bootline and other parameters correctly.
  93  */
  94 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  95 {
  96         unsigned long addr; /* Address of image */
  97         unsigned long bootaddr = 0; /* Address to put the bootline */
  98         char *bootline; /* Text of the bootline */
  99         char *tmp; /* Temporary char pointer */
 100         char build_buf[128]; /* Buffer for building the bootline */
 101         int ptr = 0;
 102 #ifdef CONFIG_X86
 103         ulong base;
 104         struct e820_info *info;
 105         struct e820_entry *data;
 106         struct efi_gop_info *gop;
 107         struct vesa_mode_info *vesa = &mode_info.vesa;
 108 #endif
 109
 110         /*
 111          * Check the loadaddr variable.
 112          * If we don't know where the image is then we're done.
 113          */
 114         if (argc < 2)
 115                 addr = image_load_addr;
 116         else
 117                 addr = simple_strtoul(argv[1], NULL, 16);
 118
 119 #if defined(CONFIG_CMD_NET)
 120         /*
 121          * Check to see if we need to tftp the image ourselves
 122          * before starting
 123          */
 124         if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) {
 125                 if (net_loop(TFTPGET) <= 0)
 126                         return 1;
 127                 printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
 128                         addr);
 129         }
 130 #endif
 131
 132         /*
 133          * This should equate to
 134          * NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
 135          * from the VxWorks BSP header files.
 136          * This will vary from board to board
 137          */
 138 #if defined(CONFIG_SYS_VXWORKS_MAC_PTR)
 139         tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR;
 140         eth_env_get_enetaddr("ethaddr", (uchar *)build_buf);
 141         memcpy(tmp, build_buf, 6);
 142 #else
 143         puts("## Ethernet MAC address not copied to NV RAM\n");
 144 #endif
 145
 146 #ifdef CONFIG_X86
 147         /*
 148          * Get VxWorks's physical memory base address from environment,
 149          * if we don't specify it in the environment, use a default one.
 150          */
 151         base = env_get_hex("vx_phys_mem_base", VXWORKS_PHYS_MEM_BASE);
 152         data = (struct e820_entry *)(base + E820_DATA_OFFSET);
 153         info = (struct e820_info *)(base + E820_INFO_OFFSET);
 154
 155         memset(info, 0, sizeof(struct e820_info));
 156         info->sign = E820_SIGNATURE;
 157         info->entries = install_e820_map(E820MAX, data);
 158         info->addr = (info->entries - 1) * sizeof(struct e820_entry) +
 159                      E820_DATA_OFFSET;
 160
 161         /*
 162          * Explicitly clear the bootloader image size otherwise if memory
 163          * at this offset happens to contain some garbage data, the final
 164          * available memory size for the kernel is insane.
 165          */
 166         *(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0;
 167
 168         /*
 169          * Prepare compatible framebuffer information block.
 170          * The VESA mode has to be 32-bit RGBA.
 171          */
 172         if (vesa->x_resolution && vesa->y_resolution) {
 173                 gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET);
 174                 gop->magic = EFI_GOP_INFO_MAGIC;
 175                 gop->info.version = 0;
 176                 gop->info.width = vesa->x_resolution;
 177                 gop->info.height = vesa->y_resolution;
 178                 gop->info.pixel_format = EFI_GOT_RGBA8;
 179                 gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4;
 180                 gop->fb_base = vesa->phys_base_ptr;
 181                 gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution;
 182         }
 183 #endif
 184
 185         /*
 186          * Use bootaddr to find the location in memory that VxWorks
 187          * will look for the bootline string. The default value is
 188          * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
 189          * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
 190          */
 191         tmp = env_get("bootaddr");
 192         if (!tmp) {
 193 #ifdef CONFIG_X86
 194                 bootaddr = base + X86_BOOT_LINE_OFFSET;
 195 #else
 196                 printf("## VxWorks bootline address not specified\n");
 197                 return 1;
 198 #endif
 199         }
 200
 201         if (!bootaddr)
 202                 bootaddr = simple_strtoul(tmp, NULL, 16);
 203
 204         /*
 205          * Check to see if the bootline is defined in the 'bootargs' parameter.
 206          * If it is not defined, we may be able to construct the info.
 207          */
 208         bootline = env_get("bootargs");
 209         if (!bootline) {
 210                 tmp = env_get("bootdev");
 211                 if (tmp) {
 212                         strcpy(build_buf, tmp);
 213                         ptr = strlen(tmp);
 214                 } else {
 215                         printf("## VxWorks boot device not specified\n");
 216                 }
 217
 218                 tmp = env_get("bootfile");
 219                 if (tmp)
 220                         ptr += sprintf(build_buf + ptr, "host:%s ", tmp);
 221                 else
 222                         ptr += sprintf(build_buf + ptr, "host:vxWorks ");
 223
 224                 /*
 225                  * The following parameters are only needed if 'bootdev'
 226                  * is an ethernet device, otherwise they are optional.
 227                  */
 228                 tmp = env_get("ipaddr");
 229                 if (tmp) {
 230                         ptr += sprintf(build_buf + ptr, "e=%s", tmp);
 231                         tmp = env_get("netmask");
 232                         if (tmp) {
 233                                 u32 mask = env_get_ip("netmask").s_addr;
 234                                 ptr += sprintf(build_buf + ptr,
 235                                                ":%08x ", ntohl(mask));
 236                         } else {
 237                                 ptr += sprintf(build_buf + ptr, " ");
 238                         }
 239                 }
 240
 241                 tmp = env_get("serverip");
 242                 if (tmp)
 243                         ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
 244
 245                 tmp = env_get("gatewayip");
 246                 if (tmp)
 247                         ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
 248
 249                 tmp = env_get("hostname");
 250                 if (tmp)
 251                         ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
 252
 253                 tmp = env_get("othbootargs");
 254                 if (tmp) {
 255                         strcpy(build_buf + ptr, tmp);
 256                         ptr += strlen(tmp);
 257                 }
 258
 259                 bootline = build_buf;
 260         }
 261
 262         memcpy((void *)bootaddr, bootline, max(strlen(bootline), (size_t)255));
 263         flush_cache(bootaddr, max(strlen(bootline), (size_t)255));
 264         printf("## Using bootline (@ 0x%lx): %s\n", bootaddr, (char *)bootaddr);
 265
 266         /*
 267          * If the data at the load address is an elf image, then
 268          * treat it like an elf image. Otherwise, assume that it is a
 269          * binary image.
 270          */
 271         if (valid_elf_image(addr))
 272                 addr = load_elf_image_phdr(addr);
 273         else
 274                 puts("## Not an ELF image, assuming binary\n");
 275
 276         printf("## Starting vxWorks at 0x%08lx ...\n", addr);
 277
 278         dcache_disable();
 279 #if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
 280         armv8_setup_psci();
 281         smp_kick_all_cpus();
 282 #endif
 283
 284 #ifdef CONFIG_X86
 285         /* VxWorks on x86 uses stack to pass parameters */
 286         ((asmlinkage void (*)(int))addr)(0);
 287 #else
 288         ((void (*)(int))addr)(0);
 289 #endif
 290
 291         puts("## vxWorks terminated\n");
 292
 293         return 1;
 294 }
 295
 296 U_BOOT_CMD(
 297         bootelf, CONFIG_SYS_MAXARGS, 0, do_bootelf,
 298         "Boot from an ELF image in memory",
 299         "[-p|-s] [address]\n"
 300         "\t- load ELF image at [address] via program headers (-p)\n"
 301         "\t  or via section headers (-s)"
 302 );
 303
 304 U_BOOT_CMD(
 305         bootvx, 2, 0, do_bootvx,
 306         "Boot vxWorks from an ELF image",
 307         " [address] - load address of vxWorks ELF image."
 308 );