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(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
57 roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
61 if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags &
62 EF_PPC64_ELFV1_ABI)) {
64 * For the 64-bit PowerPC ELF V1 ABI, e_entry is a function
65 * descriptor pointer with the first double word being the
66 * address of the entry point of the function.
68 uintptr_t addr = ehdr->e_entry;
70 return *(Elf64_Addr *)addr;
76 static unsigned long load_elf64_image_shdr(unsigned long addr)
78 Elf64_Ehdr *ehdr; /* Elf header structure pointer */
79 Elf64_Shdr *shdr; /* Section header structure pointer */
80 unsigned char *strtab = 0; /* String table pointer */
81 unsigned char *image; /* Binary image pointer */
82 int i; /* Loop counter */
84 ehdr = (Elf64_Ehdr *)addr;
86 /* Find the section header string table for output info */
87 shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff +
88 (ehdr->e_shstrndx * sizeof(Elf64_Shdr)));
90 if (shdr->sh_type == SHT_STRTAB)
91 strtab = (unsigned char *)(addr + (ulong)shdr->sh_offset);
93 /* Load each appropriate section */
94 for (i = 0; i < ehdr->e_shnum; ++i) {
95 shdr = (Elf64_Shdr *)(addr + (ulong)ehdr->e_shoff +
96 (i * sizeof(Elf64_Shdr)));
98 if (!(shdr->sh_flags & SHF_ALLOC) ||
99 shdr->sh_addr == 0 || shdr->sh_size == 0) {
104 debug("%sing %s @ 0x%08lx (%ld bytes)\n",
105 (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
106 &strtab[shdr->sh_name],
107 (unsigned long)shdr->sh_addr,
108 (long)shdr->sh_size);
111 if (shdr->sh_type == SHT_NOBITS) {
112 memset((void *)(uintptr_t)shdr->sh_addr, 0,
115 image = (unsigned char *)addr + (ulong)shdr->sh_offset;
116 memcpy((void *)(uintptr_t)shdr->sh_addr,
117 (const void *)image, shdr->sh_size);
119 flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
120 roundup((shdr->sh_addr + shdr->sh_size),
122 rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
125 if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags &
126 EF_PPC64_ELFV1_ABI)) {
128 * For the 64-bit PowerPC ELF V1 ABI, e_entry is a function
129 * descriptor pointer with the first double word being the
130 * address of the entry point of the function.
132 uintptr_t addr = ehdr->e_entry;
134 return *(Elf64_Addr *)addr;
137 return ehdr->e_entry;
141 * A very simple ELF loader, assumes the image is valid, returns the
142 * entry point address.
144 * The loader firstly reads the EFI class to see if it's a 64-bit image.
145 * If yes, call the ELF64 loader. Otherwise continue with the ELF32 loader.
147 static unsigned long load_elf_image_phdr(unsigned long addr)
149 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
150 Elf32_Phdr *phdr; /* Program header structure pointer */
153 ehdr = (Elf32_Ehdr *)addr;
154 if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
155 return load_elf64_image_phdr(addr);
157 phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
159 /* Load each program header */
160 for (i = 0; i < ehdr->e_phnum; ++i) {
161 void *dst = (void *)(uintptr_t)phdr->p_paddr;
162 void *src = (void *)addr + phdr->p_offset;
164 debug("Loading phdr %i to 0x%p (%i bytes)\n",
165 i, dst, phdr->p_filesz);
167 memcpy(dst, src, phdr->p_filesz);
168 if (phdr->p_filesz != phdr->p_memsz)
169 memset(dst + phdr->p_filesz, 0x00,
170 phdr->p_memsz - phdr->p_filesz);
171 flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
172 roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
176 return ehdr->e_entry;
179 static unsigned long load_elf_image_shdr(unsigned long addr)
181 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
182 Elf32_Shdr *shdr; /* Section header structure pointer */
183 unsigned char *strtab = 0; /* String table pointer */
184 unsigned char *image; /* Binary image pointer */
185 int i; /* Loop counter */
187 ehdr = (Elf32_Ehdr *)addr;
188 if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
189 return load_elf64_image_shdr(addr);
191 /* Find the section header string table for output info */
192 shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
193 (ehdr->e_shstrndx * sizeof(Elf32_Shdr)));
195 if (shdr->sh_type == SHT_STRTAB)
196 strtab = (unsigned char *)(addr + shdr->sh_offset);
198 /* Load each appropriate section */
199 for (i = 0; i < ehdr->e_shnum; ++i) {
200 shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
201 (i * sizeof(Elf32_Shdr)));
203 if (!(shdr->sh_flags & SHF_ALLOC) ||
204 shdr->sh_addr == 0 || shdr->sh_size == 0) {
209 debug("%sing %s @ 0x%08lx (%ld bytes)\n",
210 (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
211 &strtab[shdr->sh_name],
212 (unsigned long)shdr->sh_addr,
213 (long)shdr->sh_size);
216 if (shdr->sh_type == SHT_NOBITS) {
217 memset((void *)(uintptr_t)shdr->sh_addr, 0,
220 image = (unsigned char *)addr + shdr->sh_offset;
221 memcpy((void *)(uintptr_t)shdr->sh_addr,
222 (const void *)image, shdr->sh_size);
224 flush_cache(rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN),
225 roundup((shdr->sh_addr + shdr->sh_size),
227 rounddown(shdr->sh_addr, ARCH_DMA_MINALIGN));
230 return ehdr->e_entry;
233 /* Allow ports to override the default behavior */
234 static unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
235 int argc, char * const argv[])
240 * pass address parameter as argv[0] (aka command name),
241 * and all remaining args
243 ret = entry(argc, argv);
249 * Determine if a valid ELF image exists at the given memory location.
250 * First look at the ELF header magic field, then make sure that it is
253 int valid_elf_image(unsigned long addr)
255 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
257 ehdr = (Elf32_Ehdr *)addr;
259 if (!IS_ELF(*ehdr)) {
260 printf("## No elf image at address 0x%08lx\n", addr);
264 if (ehdr->e_type != ET_EXEC) {
265 printf("## Not a 32-bit elf image at address 0x%08lx\n", addr);
272 /* Interpreter command to boot an arbitrary ELF image from memory */
273 int do_bootelf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
275 unsigned long addr; /* Address of the ELF image */
276 unsigned long rc; /* Return value from user code */
278 const char *ep = env_get("autostart");
281 /* Consume 'bootelf' */
284 /* Check for flag. */
285 if (argc >= 1 && (argv[0][0] == '-' && \
286 (argv[0][1] == 'p' || argv[0][1] == 's'))) {
291 /* Check for address. */
292 if (argc >= 1 && strict_strtoul(argv[0], 16, &addr) != -EINVAL) {
293 /* Consume address */
298 if (!valid_elf_image(addr))
301 if (sload && sload[1] == 'p')
302 addr = load_elf_image_phdr(addr);
304 addr = load_elf_image_shdr(addr);
306 if (ep && !strcmp(ep, "no"))
309 printf("## Starting application at 0x%08lx ...\n", addr);
312 * pass address parameter as argv[0] (aka command name),
313 * and all remaining args
315 rc = do_bootelf_exec((void *)addr, argc, argv);
319 printf("## Application terminated, rc = 0x%lx\n", rc);
325 * Interpreter command to boot VxWorks from a memory image. The image can
326 * be either an ELF image or a raw binary. Will attempt to setup the
327 * bootline and other parameters correctly.
329 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
331 unsigned long addr; /* Address of image */
332 unsigned long bootaddr = 0; /* Address to put the bootline */
333 char *bootline; /* Text of the bootline */
334 char *tmp; /* Temporary char pointer */
335 char build_buf[128]; /* Buffer for building the bootline */
339 struct e820_info *info;
340 struct e820_entry *data;
341 struct efi_gop_info *gop;
342 struct vesa_mode_info *vesa = &mode_info.vesa;
346 * Check the loadaddr variable.
347 * If we don't know where the image is then we're done.
352 addr = simple_strtoul(argv[1], NULL, 16);
354 #if defined(CONFIG_CMD_NET)
356 * Check to see if we need to tftp the image ourselves
359 if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) {
360 if (net_loop(TFTPGET) <= 0)
362 printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
368 * This should equate to
369 * NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
370 * from the VxWorks BSP header files.
371 * This will vary from board to board
373 #if defined(CONFIG_SYS_VXWORKS_MAC_PTR)
374 tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR;
375 eth_env_get_enetaddr("ethaddr", (uchar *)build_buf);
376 memcpy(tmp, build_buf, 6);
378 puts("## Ethernet MAC address not copied to NV RAM\n");
383 * Get VxWorks's physical memory base address from environment,
384 * if we don't specify it in the environment, use a default one.
386 base = env_get_hex("vx_phys_mem_base", VXWORKS_PHYS_MEM_BASE);
387 data = (struct e820_entry *)(base + E820_DATA_OFFSET);
388 info = (struct e820_info *)(base + E820_INFO_OFFSET);
390 memset(info, 0, sizeof(struct e820_info));
391 info->sign = E820_SIGNATURE;
392 info->entries = install_e820_map(E820MAX, data);
393 info->addr = (info->entries - 1) * sizeof(struct e820_entry) +
397 * Explicitly clear the bootloader image size otherwise if memory
398 * at this offset happens to contain some garbage data, the final
399 * available memory size for the kernel is insane.
401 *(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0;
404 * Prepare compatible framebuffer information block.
405 * The VESA mode has to be 32-bit RGBA.
407 if (vesa->x_resolution && vesa->y_resolution) {
408 gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET);
409 gop->magic = EFI_GOP_INFO_MAGIC;
410 gop->info.version = 0;
411 gop->info.width = vesa->x_resolution;
412 gop->info.height = vesa->y_resolution;
413 gop->info.pixel_format = EFI_GOT_RGBA8;
414 gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4;
415 gop->fb_base = vesa->phys_base_ptr;
416 gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution;
421 * Use bootaddr to find the location in memory that VxWorks
422 * will look for the bootline string. The default value is
423 * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
424 * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
426 tmp = env_get("bootaddr");
429 bootaddr = base + X86_BOOT_LINE_OFFSET;
431 printf("## VxWorks bootline address not specified\n");
437 bootaddr = simple_strtoul(tmp, NULL, 16);
440 * Check to see if the bootline is defined in the 'bootargs' parameter.
441 * If it is not defined, we may be able to construct the info.
443 bootline = env_get("bootargs");
445 tmp = env_get("bootdev");
447 strcpy(build_buf, tmp);
450 printf("## VxWorks boot device not specified\n");
453 tmp = env_get("bootfile");
455 ptr += sprintf(build_buf + ptr, "host:%s ", tmp);
457 ptr += sprintf(build_buf + ptr, "host:vxWorks ");
460 * The following parameters are only needed if 'bootdev'
461 * is an ethernet device, otherwise they are optional.
463 tmp = env_get("ipaddr");
465 ptr += sprintf(build_buf + ptr, "e=%s", tmp);
466 tmp = env_get("netmask");
468 u32 mask = env_get_ip("netmask").s_addr;
469 ptr += sprintf(build_buf + ptr,
470 ":%08x ", ntohl(mask));
472 ptr += sprintf(build_buf + ptr, " ");
476 tmp = env_get("serverip");
478 ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
480 tmp = env_get("gatewayip");
482 ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
484 tmp = env_get("hostname");
486 ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
488 tmp = env_get("othbootargs");
490 strcpy(build_buf + ptr, tmp);
494 bootline = build_buf;
497 memcpy((void *)bootaddr, bootline, max(strlen(bootline), (size_t)255));
498 flush_cache(bootaddr, max(strlen(bootline), (size_t)255));
499 printf("## Using bootline (@ 0x%lx): %s\n", bootaddr, (char *)bootaddr);
502 * If the data at the load address is an elf image, then
503 * treat it like an elf image. Otherwise, assume that it is a
506 if (valid_elf_image(addr))
507 addr = load_elf_image_phdr(addr);
509 puts("## Not an ELF image, assuming binary\n");
511 printf("## Starting vxWorks at 0x%08lx ...\n", addr);
514 #if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
520 /* VxWorks on x86 uses stack to pass parameters */
521 ((asmlinkage void (*)(int))addr)(0);
523 ((void (*)(int))addr)(0);
526 puts("## vxWorks terminated\n");
532 bootelf, CONFIG_SYS_MAXARGS, 0, do_bootelf,
533 "Boot from an ELF image in memory",
534 "[-p|-s] [address]\n"
535 "\t- load ELF image at [address] via program headers (-p)\n"
536 "\t or via section headers (-s)"
540 bootvx, 2, 0, do_bootvx,
541 "Boot vxWorks from an ELF image",
542 " [address] - load address of vxWorks ELF image."