2 * Copyright (c) 2001 William L. Pitts
5 * Redistribution and use in source and binary forms are freely
6 * permitted provided that the above copyright notice and this
7 * paragraph and the following disclaimer are duplicated in all
10 * This software is provided "AS IS" and without any express or
11 * implied warranties, including, without limitation, the implied
12 * warranties of merchantability and fitness for a particular
19 #include <environment.h>
25 #include <linux/linkage.h>
29 * A very simple ELF64 loader, assumes the image is valid, returns the
30 * entry point address.
32 * Note if U-Boot is 32-bit, the loader assumes the to segment's
33 * physical address and size is within the lower 32-bit address space.
35 static unsigned long load_elf64_image_phdr(unsigned long addr)
37 Elf64_Ehdr *ehdr; /* Elf header structure pointer */
38 Elf64_Phdr *phdr; /* Program header structure pointer */
41 ehdr = (Elf64_Ehdr *)addr;
42 phdr = (Elf64_Phdr *)(addr + (ulong)ehdr->e_phoff);
44 /* Load each program header */
45 for (i = 0; i < ehdr->e_phnum; ++i) {
46 void *dst = (void *)(ulong)phdr->p_paddr;
47 void *src = (void *)addr + phdr->p_offset;
49 debug("Loading phdr %i to 0x%p (%lu bytes)\n",
50 i, dst, (ulong)phdr->p_filesz);
52 memcpy(dst, src, phdr->p_filesz);
53 if (phdr->p_filesz != phdr->p_memsz)
54 memset(dst + phdr->p_filesz, 0x00,
55 phdr->p_memsz - phdr->p_filesz);
56 flush_cache((unsigned long)dst, phdr->p_filesz);
64 * A very simple ELF loader, assumes the image is valid, returns the
65 * entry point address.
67 * The loader firstly reads the EFI class to see if it's a 64-bit image.
68 * If yes, call the ELF64 loader. Otherwise continue with the ELF32 loader.
70 static unsigned long load_elf_image_phdr(unsigned long addr)
72 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
73 Elf32_Phdr *phdr; /* Program header structure pointer */
76 ehdr = (Elf32_Ehdr *)addr;
77 if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
78 return load_elf64_image_phdr(addr);
80 phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
82 /* Load each program header */
83 for (i = 0; i < ehdr->e_phnum; ++i) {
84 void *dst = (void *)(uintptr_t)phdr->p_paddr;
85 void *src = (void *)addr + phdr->p_offset;
87 debug("Loading phdr %i to 0x%p (%i bytes)\n",
88 i, dst, phdr->p_filesz);
90 memcpy(dst, src, phdr->p_filesz);
91 if (phdr->p_filesz != phdr->p_memsz)
92 memset(dst + phdr->p_filesz, 0x00,
93 phdr->p_memsz - phdr->p_filesz);
94 flush_cache((unsigned long)dst, phdr->p_filesz);
101 static unsigned long load_elf_image_shdr(unsigned long addr)
103 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
104 Elf32_Shdr *shdr; /* Section header structure pointer */
105 unsigned char *strtab = 0; /* String table pointer */
106 unsigned char *image; /* Binary image pointer */
107 int i; /* Loop counter */
109 ehdr = (Elf32_Ehdr *)addr;
111 /* Find the section header string table for output info */
112 shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
113 (ehdr->e_shstrndx * sizeof(Elf32_Shdr)));
115 if (shdr->sh_type == SHT_STRTAB)
116 strtab = (unsigned char *)(addr + shdr->sh_offset);
118 /* Load each appropriate section */
119 for (i = 0; i < ehdr->e_shnum; ++i) {
120 shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
121 (i * sizeof(Elf32_Shdr)));
123 if (!(shdr->sh_flags & SHF_ALLOC) ||
124 shdr->sh_addr == 0 || shdr->sh_size == 0) {
129 debug("%sing %s @ 0x%08lx (%ld bytes)\n",
130 (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
131 &strtab[shdr->sh_name],
132 (unsigned long)shdr->sh_addr,
133 (long)shdr->sh_size);
136 if (shdr->sh_type == SHT_NOBITS) {
137 memset((void *)(uintptr_t)shdr->sh_addr, 0,
140 image = (unsigned char *)addr + shdr->sh_offset;
141 memcpy((void *)(uintptr_t)shdr->sh_addr,
142 (const void *)image, shdr->sh_size);
144 flush_cache(shdr->sh_addr, shdr->sh_size);
147 return ehdr->e_entry;
150 /* Allow ports to override the default behavior */
151 static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
152 int argc, char * const argv[])
157 * pass address parameter as argv[0] (aka command name),
158 * and all remaining args
160 ret = entry(argc, argv);
166 * Determine if a valid ELF image exists at the given memory location.
167 * First look at the ELF header magic field, then make sure that it is
170 int valid_elf_image(unsigned long addr)
172 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
174 ehdr = (Elf32_Ehdr *)addr;
176 if (!IS_ELF(*ehdr)) {
177 printf("## No elf image at address 0x%08lx\n", addr);
181 if (ehdr->e_type != ET_EXEC) {
182 printf("## Not a 32-bit elf image at address 0x%08lx\n", addr);
189 /* Interpreter command to boot an arbitrary ELF image from memory */
190 int do_bootelf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
192 unsigned long addr; /* Address of the ELF image */
193 unsigned long rc; /* Return value from user code */
195 const char *ep = env_get("autostart");
198 /* Consume 'bootelf' */
201 /* Check for flag. */
202 if (argc >= 1 && (argv[0][0] == '-' && \
203 (argv[0][1] == 'p' || argv[0][1] == 's'))) {
208 /* Check for address. */
209 if (argc >= 1 && strict_strtoul(argv[0], 16, &addr) != -EINVAL) {
210 /* Consume address */
215 if (!valid_elf_image(addr))
218 if (sload && sload[1] == 'p')
219 addr = load_elf_image_phdr(addr);
221 addr = load_elf_image_shdr(addr);
223 if (ep && !strcmp(ep, "no"))
226 printf("## Starting application at 0x%08lx ...\n", addr);
229 * pass address parameter as argv[0] (aka command name),
230 * and all remaining args
232 rc = do_bootelf_exec((void *)addr, argc, argv);
236 printf("## Application terminated, rc = 0x%lx\n", rc);
242 * Interpreter command to boot VxWorks from a memory image. The image can
243 * be either an ELF image or a raw binary. Will attempt to setup the
244 * bootline and other parameters correctly.
246 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
248 unsigned long addr; /* Address of image */
249 unsigned long bootaddr = 0; /* Address to put the bootline */
250 char *bootline; /* Text of the bootline */
251 char *tmp; /* Temporary char pointer */
252 char build_buf[128]; /* Buffer for building the bootline */
256 struct e820_info *info;
257 struct e820_entry *data;
258 struct efi_gop_info *gop;
259 struct vesa_mode_info *vesa = &mode_info.vesa;
263 * Check the loadaddr variable.
264 * If we don't know where the image is then we're done.
269 addr = simple_strtoul(argv[1], NULL, 16);
271 #if defined(CONFIG_CMD_NET)
273 * Check to see if we need to tftp the image ourselves
276 if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) {
277 if (net_loop(TFTPGET) <= 0)
279 printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
285 * This should equate to
286 * NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
287 * from the VxWorks BSP header files.
288 * This will vary from board to board
290 #if defined(CONFIG_SYS_VXWORKS_MAC_PTR)
291 tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR;
292 eth_env_get_enetaddr("ethaddr", (uchar *)build_buf);
293 memcpy(tmp, build_buf, 6);
295 puts("## Ethernet MAC address not copied to NV RAM\n");
300 * Get VxWorks's physical memory base address from environment,
301 * if we don't specify it in the environment, use a default one.
303 base = env_get_hex("vx_phys_mem_base", VXWORKS_PHYS_MEM_BASE);
304 data = (struct e820_entry *)(base + E820_DATA_OFFSET);
305 info = (struct e820_info *)(base + E820_INFO_OFFSET);
307 memset(info, 0, sizeof(struct e820_info));
308 info->sign = E820_SIGNATURE;
309 info->entries = install_e820_map(E820MAX, data);
310 info->addr = (info->entries - 1) * sizeof(struct e820_entry) +
314 * Explicitly clear the bootloader image size otherwise if memory
315 * at this offset happens to contain some garbage data, the final
316 * available memory size for the kernel is insane.
318 *(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0;
321 * Prepare compatible framebuffer information block.
322 * The VESA mode has to be 32-bit RGBA.
324 if (vesa->x_resolution && vesa->y_resolution) {
325 gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET);
326 gop->magic = EFI_GOP_INFO_MAGIC;
327 gop->info.version = 0;
328 gop->info.width = vesa->x_resolution;
329 gop->info.height = vesa->y_resolution;
330 gop->info.pixel_format = EFI_GOT_RGBA8;
331 gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4;
332 gop->fb_base = vesa->phys_base_ptr;
333 gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution;
338 * Use bootaddr to find the location in memory that VxWorks
339 * will look for the bootline string. The default value is
340 * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
341 * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
343 tmp = env_get("bootaddr");
346 bootaddr = base + X86_BOOT_LINE_OFFSET;
348 printf("## VxWorks bootline address not specified\n");
354 bootaddr = simple_strtoul(tmp, NULL, 16);
357 * Check to see if the bootline is defined in the 'bootargs' parameter.
358 * If it is not defined, we may be able to construct the info.
360 bootline = env_get("bootargs");
362 tmp = env_get("bootdev");
364 strcpy(build_buf, tmp);
367 printf("## VxWorks boot device not specified\n");
370 tmp = env_get("bootfile");
372 ptr += sprintf(build_buf + ptr, "host:%s ", tmp);
374 ptr += sprintf(build_buf + ptr, "host:vxWorks ");
377 * The following parameters are only needed if 'bootdev'
378 * is an ethernet device, otherwise they are optional.
380 tmp = env_get("ipaddr");
382 ptr += sprintf(build_buf + ptr, "e=%s", tmp);
383 tmp = env_get("netmask");
385 u32 mask = env_get_ip("netmask").s_addr;
386 ptr += sprintf(build_buf + ptr,
387 ":%08x ", ntohl(mask));
389 ptr += sprintf(build_buf + ptr, " ");
393 tmp = env_get("serverip");
395 ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
397 tmp = env_get("gatewayip");
399 ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
401 tmp = env_get("hostname");
403 ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
405 tmp = env_get("othbootargs");
407 strcpy(build_buf + ptr, tmp);
411 bootline = build_buf;
414 memcpy((void *)bootaddr, bootline, max(strlen(bootline), (size_t)255));
415 flush_cache(bootaddr, max(strlen(bootline), (size_t)255));
416 printf("## Using bootline (@ 0x%lx): %s\n", bootaddr, (char *)bootaddr);
419 * If the data at the load address is an elf image, then
420 * treat it like an elf image. Otherwise, assume that it is a
423 if (valid_elf_image(addr))
424 addr = load_elf_image_phdr(addr);
426 puts("## Not an ELF image, assuming binary\n");
428 printf("## Starting vxWorks at 0x%08lx ...\n", addr);
431 #if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
437 /* VxWorks on x86 uses stack to pass parameters */
438 ((asmlinkage void (*)(int))addr)(0);
440 ((void (*)(int))addr)(0);
443 puts("## vxWorks terminated\n");
449 bootelf, CONFIG_SYS_MAXARGS, 0, do_bootelf,
450 "Boot from an ELF image in memory",
451 "[-p|-s] [address]\n"
452 "\t- load ELF image at [address] via program headers (-p)\n"
453 "\t or via section headers (-s)"
457 bootvx, 2, 0, do_bootvx,
458 "Boot vxWorks from an ELF image",
459 " [address] - load address of vxWorks ELF image."