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 <log.h>
  14 #include <net.h>
  15 #include <vxworks.h>
  16 #ifdef CONFIG_X86
  17 #include <vbe.h>
  18 #include <asm/cache.h>
  19 #include <asm/e820.h>
  20 #include <linux/linkage.h>
  21 #endif
  22
  23 /* Allow ports to override the default behavior */
  24 static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
  25                                      int argc, char *const argv[])
  26 {
  27         unsigned long ret;
  28
  29         /*
  30          * pass address parameter as argv[0] (aka command name),
  31          * and all remaining args
  32          */
  33         ret = entry(argc, argv);
  34
  35         return ret;
  36 }
  37
  38 /* Interpreter command to boot an arbitrary ELF image from memory */
  39 int do_bootelf(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  40 {
  41         unsigned long addr; /* Address of the ELF image */
  42         unsigned long rc; /* Return value from user code */
  43         char *sload = NULL;
  44         const char *ep = env_get("autostart");
  45         int rcode = 0;
  46
  47         /* Consume 'bootelf' */
  48         argc--; argv++;
  49
  50         /* Check for flag. */
  51         if (argc >= 1 && (argv[0][0] == '-' && \
  52                                 (argv[0][1] == 'p' || argv[0][1] == 's'))) {
  53                 sload = argv[0];
  54                 /* Consume flag. */
  55                 argc--; argv++;
  56         }
  57         /* Check for address. */
  58         if (argc >= 1 && strict_strtoul(argv[0], 16, &addr) != -EINVAL) {
  59                 /* Consume address */
  60                 argc--; argv++;
  61         } else
  62                 addr = image_load_addr;
  63
  64         if (!valid_elf_image(addr))
  65                 return 1;
  66
  67         if (sload && sload[1] == 'p')
  68                 addr = load_elf_image_phdr(addr);
  69         else
  70                 addr = load_elf_image_shdr(addr);
  71
  72         if (ep && !strcmp(ep, "no"))
  73                 return rcode;
  74
  75         printf("## Starting application at 0x%08lx ...\n", addr);
  76
  77         /*
  78          * pass address parameter as argv[0] (aka command name),
  79          * and all remaining args
  80          */
  81         rc = do_bootelf_exec((void *)addr, argc, argv);
  82         if (rc != 0)
  83                 rcode = 1;
  84
  85         printf("## Application terminated, rc = 0x%lx\n", rc);
  86
  87         return rcode;
  88 }
  89
  90 /*
  91  * Interpreter command to boot VxWorks from a memory image.  The image can
  92  * be either an ELF image or a raw binary.  Will attempt to setup the
  93  * bootline and other parameters correctly.
  94  */
  95 int do_bootvx(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  96 {
  97         unsigned long addr; /* Address of image */
  98         unsigned long bootaddr = 0; /* Address to put the bootline */
  99         char *bootline; /* Text of the bootline */
 100         char *tmp; /* Temporary char pointer */
 101         char build_buf[128]; /* Buffer for building the bootline */
 102         int ptr = 0;
 103 #ifdef CONFIG_X86
 104         ulong base;
 105         struct e820_info *info;
 106         struct e820_entry *data;
 107         struct efi_gop_info *gop;
 108         struct vesa_mode_info *vesa = &mode_info.vesa;
 109 #endif
 110
 111         /*
 112          * Check the loadaddr variable.
 113          * If we don't know where the image is then we're done.
 114          */
 115         if (argc < 2)
 116                 addr = image_load_addr;
 117         else
 118                 addr = simple_strtoul(argv[1], NULL, 16);
 119
 120 #if defined(CONFIG_CMD_NET)
 121         /*
 122          * Check to see if we need to tftp the image ourselves
 123          * before starting
 124          */
 125         if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) {
 126                 if (net_loop(TFTPGET) <= 0)
 127                         return 1;
 128                 printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
 129                         addr);
 130         }
 131 #endif
 132
 133         /*
 134          * This should equate to
 135          * NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
 136          * from the VxWorks BSP header files.
 137          * This will vary from board to board
 138          */
 139 #if defined(CONFIG_SYS_VXWORKS_MAC_PTR)
 140         tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR;
 141         eth_env_get_enetaddr("ethaddr", (uchar *)build_buf);
 142         memcpy(tmp, build_buf, 6);
 143 #else
 144         puts("## Ethernet MAC address not copied to NV RAM\n");
 145 #endif
 146
 147 #ifdef CONFIG_X86
 148         /*
 149          * Get VxWorks's physical memory base address from environment,
 150          * if we don't specify it in the environment, use a default one.
 151          */
 152         base = env_get_hex("vx_phys_mem_base", VXWORKS_PHYS_MEM_BASE);
 153         data = (struct e820_entry *)(base + E820_DATA_OFFSET);
 154         info = (struct e820_info *)(base + E820_INFO_OFFSET);
 155
 156         memset(info, 0, sizeof(struct e820_info));
 157         info->sign = E820_SIGNATURE;
 158         info->entries = install_e820_map(E820MAX, data);
 159         info->addr = (info->entries - 1) * sizeof(struct e820_entry) +
 160                      E820_DATA_OFFSET;
 161
 162         /*
 163          * Explicitly clear the bootloader image size otherwise if memory
 164          * at this offset happens to contain some garbage data, the final
 165          * available memory size for the kernel is insane.
 166          */
 167         *(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0;
 168
 169         /*
 170          * Prepare compatible framebuffer information block.
 171          * The VESA mode has to be 32-bit RGBA.
 172          */
 173         if (vesa->x_resolution && vesa->y_resolution) {
 174                 gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET);
 175                 gop->magic = EFI_GOP_INFO_MAGIC;
 176                 gop->info.version = 0;
 177                 gop->info.width = vesa->x_resolution;
 178                 gop->info.height = vesa->y_resolution;
 179                 gop->info.pixel_format = EFI_GOT_RGBA8;
 180                 gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4;
 181                 gop->fb_base = vesa->phys_base_ptr;
 182                 gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution;
 183         }
 184 #endif
 185
 186         /*
 187          * Use bootaddr to find the location in memory that VxWorks
 188          * will look for the bootline string. The default value is
 189          * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
 190          * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
 191          */
 192         tmp = env_get("bootaddr");
 193         if (!tmp) {
 194 #ifdef CONFIG_X86
 195                 bootaddr = base + X86_BOOT_LINE_OFFSET;
 196 #else
 197                 printf("## VxWorks bootline address not specified\n");
 198                 return 1;
 199 #endif
 200         }
 201
 202         if (!bootaddr)
 203                 bootaddr = simple_strtoul(tmp, NULL, 16);
 204
 205         /*
 206          * Check to see if the bootline is defined in the 'bootargs' parameter.
 207          * If it is not defined, we may be able to construct the info.
 208          */
 209         bootline = env_get("bootargs");
 210         if (!bootline) {
 211                 tmp = env_get("bootdev");
 212                 if (tmp) {
 213                         strcpy(build_buf, tmp);
 214                         ptr = strlen(tmp);
 215                 } else {
 216                         printf("## VxWorks boot device not specified\n");
 217                 }
 218
 219                 tmp = env_get("bootfile");
 220                 if (tmp)
 221                         ptr += sprintf(build_buf + ptr, "host:%s ", tmp);
 222                 else
 223                         ptr += sprintf(build_buf + ptr, "host:vxWorks ");
 224
 225                 /*
 226                  * The following parameters are only needed if 'bootdev'
 227                  * is an ethernet device, otherwise they are optional.
 228                  */
 229                 tmp = env_get("ipaddr");
 230                 if (tmp) {
 231                         ptr += sprintf(build_buf + ptr, "e=%s", tmp);
 232                         tmp = env_get("netmask");
 233                         if (tmp) {
 234                                 u32 mask = env_get_ip("netmask").s_addr;
 235                                 ptr += sprintf(build_buf + ptr,
 236                                                ":%08x ", ntohl(mask));
 237                         } else {
 238                                 ptr += sprintf(build_buf + ptr, " ");
 239                         }
 240                 }
 241
 242                 tmp = env_get("serverip");
 243                 if (tmp)
 244                         ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
 245
 246                 tmp = env_get("gatewayip");
 247                 if (tmp)
 248                         ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
 249
 250                 tmp = env_get("hostname");
 251                 if (tmp)
 252                         ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
 253
 254                 tmp = env_get("othbootargs");
 255                 if (tmp) {
 256                         strcpy(build_buf + ptr, tmp);
 257                         ptr += strlen(tmp);
 258                 }
 259
 260                 bootline = build_buf;
 261         }
 262
 263         memcpy((void *)bootaddr, bootline, max(strlen(bootline), (size_t)255));
 264         flush_cache(bootaddr, max(strlen(bootline), (size_t)255));
 265         printf("## Using bootline (@ 0x%lx): %s\n", bootaddr, (char *)bootaddr);
 266
 267         /*
 268          * If the data at the load address is an elf image, then
 269          * treat it like an elf image. Otherwise, assume that it is a
 270          * binary image.
 271          */
 272         if (valid_elf_image(addr))
 273                 addr = load_elf_image_phdr(addr);
 274         else
 275                 puts("## Not an ELF image, assuming binary\n");
 276
 277         printf("## Starting vxWorks at 0x%08lx ...\n", addr);
 278
 279         dcache_disable();
 280 #if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
 281         armv8_setup_psci();
 282         smp_kick_all_cpus();
 283 #endif
 284
 285 #ifdef CONFIG_X86
 286         /* VxWorks on x86 uses stack to pass parameters */
 287         ((asmlinkage void (*)(int))addr)(0);
 288 #else
 289         ((void (*)(int))addr)(0);
 290 #endif
 291
 292         puts("## vxWorks terminated\n");
 293
 294         return 1;
 295 }
 296
 297 U_BOOT_CMD(
 298         bootelf, CONFIG_SYS_MAXARGS, 0, do_bootelf,
 299         "Boot from an ELF image in memory",
 300         "[-p|-s] [address]\n"
 301         "\t- load ELF image at [address] via program headers (-p)\n"
 302         "\t  or via section headers (-s)"
 303 );
 304
 305 U_BOOT_CMD(
 306         bootvx, 2, 0, do_bootvx,
 307         "Boot vxWorks from an ELF image",
 308         " [address] - load address of vxWorks ELF image."
 309 );