int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
\n{
\nulong\u00a0\u00a0\u00a0\u00a0 iflag;
\nulong\u00a0\u00a0\u00a0\u00a0 addr;
\nulong\u00a0\u00a0\u00a0\u00a0 data, len, checksum;
\nulong\u00a0 *len_ptr = NULL; \/* not to make warning. by scsuh *\/
\nuint\u00a0\u00a0\u00a0\u00a0 unc_len = CFG_BOOTM_LEN;
\nint\u00a0\u00a0\u00a0\u00a0 i, verify;
\nchar\u00a0\u00a0\u00a0\u00a0 *name, *s;
\nint\u00a0\u00a0\u00a0\u00a0 (*appl)(int, char *[]);
\nimage_header_t *hdr = &header;<\/p>\n
s = getenv (“verify”);
\nverify = (s && (*s == ‘n’)) ? 0 : 1;<\/p>\n
if (argc < 2) {
\naddr = load_addr;
\n} else {
\naddr = simple_strtoul(argv[1], NULL, 16);
\n}<\/p>\n
#ifdef CONFIG_ZIMAGE_BOOT
\n#define LINUX_ZIMAGE_MAGIC\u00a0\u00a0\u00a0\u00a0 0x016f2818
\nif (*(ulong *)(addr + 9*4) == LINUX_ZIMAGE_MAGIC) {
\nprintf(“Boot with zImage\\n”);
\naddr = virt_to_phys(addr);
\nhdr->ih_os = IH_OS_LINUX;
\nhdr->ih_ep = ntohl(addr);
\ngoto after_header_check;
\n}
\n#endif<\/p>\n
SHOW_BOOT_PROGRESS (1);
\nprintf (“## Booting image at %08lx …\\n”, addr);<\/p>\n
\/* Copy header so we can blank CRC field for re-calculation *\/
\n#ifdef CONFIG_HAS_DATAFLASH
\nif (addr_dataflash(addr)){
\nread_dataflash(addr, sizeof(image_header_t), (char *)&header);
\n} else
\n#endif
\nmemmove (&header, (char *)addr, sizeof(image_header_t));<\/p>\n
if (ntohl(hdr->ih_magic) != IH_MAGIC) {
\n#ifdef __I386__\u00a0\u00a0\u00a0\u00a0 \/* correct image format not implemented yet – fake it *\/
\nif (fake_header(hdr, (void*)addr, -1) != NULL) {
\n\/* to compensate for the addition below *\/
\naddr -= sizeof(image_header_t);
\n\/* turnof verify,
\n* fake_header() does not fake the data crc
\n*\/
\nverify = 0;
\n} else
\n#endif\u00a0\u00a0\u00a0\u00a0 \/* __I386__ *\/
\n{
\n#ifdef CONFIG_IMAGE_BOOT
\nprintf(“Boot with Image\\n”);
\naddr = virt_to_phys(addr);
\nhdr->ih_os = IH_OS_LINUX;
\nhdr->ih_ep = ntohl(addr);
\nhdr->ih_comp = IH_COMP_NONE;
\ngoto after_header_check;
\n#endif
\nputs (“Bad Magic Number\\n”);
\nSHOW_BOOT_PROGRESS (-1);
\nreturn 1;
\n}
\n}
\nSHOW_BOOT_PROGRESS (2);<\/p>\n
data = (ulong)&header;
\nlen\u00a0 = sizeof(image_header_t);<\/p>\n
checksum = ntohl(hdr->ih_hcrc);
\nhdr->ih_hcrc = 0;<\/p>\n
if (crc32 (0, (uchar *)data, len) != checksum) {
\nputs (“Bad Header Checksum\\n”);
\nSHOW_BOOT_PROGRESS (-2);
\nreturn 1;
\n}
\nSHOW_BOOT_PROGRESS (3);<\/p>\n
#ifdef CONFIG_HAS_DATAFLASH
\nif (addr_dataflash(addr)){
\nlen\u00a0 = ntohl(hdr->ih_size) + sizeof(image_header_t);
\nread_dataflash(addr, len, (char *)CFG_LOAD_ADDR);
\naddr = CFG_LOAD_ADDR;
\n}
\n#endif<\/p>\n
\/* for multi-file images we need the data part, too *\/
\nprint_image_hdr ((image_header_t *)addr);<\/p>\n
data = addr + sizeof(image_header_t);
\nlen\u00a0 = ntohl(hdr->ih_size);<\/p>\n
if (verify) {
\nputs (”\u00a0\u00a0 Verifying Checksum … “);
\nif (crc32 (0, (uchar *)data, len) != ntohl(hdr->ih_dcrc)) {
\nprintf (“Bad Data CRC\\n”);
\nSHOW_BOOT_PROGRESS (-3);
\nreturn 1;
\n}
\nputs (“OK\\n”);
\n}
\nSHOW_BOOT_PROGRESS (4);<\/p>\n
len_ptr = (ulong *)data;<\/p>\n
#if defined(__PPC__)
\nif (hdr->ih_arch != IH_CPU_PPC)
\n#elif defined(__ARM__)
\nif (hdr->ih_arch != IH_CPU_ARM)
\n#elif defined(__I386__)
\nif (hdr->ih_arch != IH_CPU_I386)
\n#elif defined(__mips__)
\nif (hdr->ih_arch != IH_CPU_MIPS)
\n#elif defined(__nios__)
\nif (hdr->ih_arch != IH_CPU_NIOS)
\n#elif defined(__M68K__)
\nif (hdr->ih_arch != IH_CPU_M68K)
\n#elif defined(__microblaze__)
\nif (hdr->ih_arch != IH_CPU_MICROBLAZE)
\n#elif defined(__nios2__)
\nif (hdr->ih_arch != IH_CPU_NIOS2)
\n#elif defined(__blackfin__)
\nif (hdr->ih_arch != IH_CPU_BLACKFIN)
\n#elif defined(__avr32__)
\nif (hdr->ih_arch != IH_CPU_AVR32)
\n#else
\n# error Unknown CPU type
\n#endif
\n{
\nprintf (“Unsupported Architecture 0x%x\\n”, hdr->ih_arch);
\nSHOW_BOOT_PROGRESS (-4);
\nreturn 1;
\n}
\nSHOW_BOOT_PROGRESS (5);<\/p>\n
switch (hdr->ih_type) {
\ncase IH_TYPE_STANDALONE:
\nname = “Standalone Application”;
\n\/* A second argument overwrites the load address *\/
\nif (argc > 2) {
\nhdr->ih_load = htonl(simple_strtoul(argv[2], NULL, 16));
\n}
\nbreak;
\ncase IH_TYPE_KERNEL:
\nname = “Kernel Image”;
\nbreak;
\ncase IH_TYPE_MULTI:
\nname = “Multi-File Image”;
\nlen\u00a0 = ntohl(len_ptr[0]);
\n\/* OS kernel is always the first image *\/
\ndata += 8; \/* kernel_len + terminator *\/
\nfor (i=1; len_ptr[i]; ++i)
\ndata += 4;
\nbreak;
\ndefault: printf (“Wrong Image Type for %s command\\n”, cmdtp->name);
\nSHOW_BOOT_PROGRESS (-5);
\nreturn 1;
\n}
\nSHOW_BOOT_PROGRESS (6);<\/p>\n
\/*
\n* We have reached the point of no return: we are going to
\n* overwrite all exception vector code, so we cannot easily
\n* recover from any failures any more…
\n*\/<\/p>\n
iflag = disable_interrupts();<\/p>\n
#ifdef CONFIG_AMIGAONEG3SE
\n\/*
\n* We’ve possible left the caches enabled during
\n* bios emulation, so turn them off again
\n*\/
\nicache_disable();
\ninvalidate_l1_instruction_cache();
\nflush_data_cache();
\ndcache_disable();
\n#endif<\/p>\n
switch (hdr->ih_comp) {
\ncase IH_COMP_NONE:
\nif(ntohl(hdr->ih_load) == addr) {
\nprintf (”\u00a0\u00a0 XIP %s … “, name);
\n} else {
\n#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
\nsize_t l = len;
\nvoid *to = (void *)ntohl(hdr->ih_load);
\nvoid *from = (void *)data;<\/p>\n
printf (”\u00a0\u00a0 Loading %s … “, name);<\/p>\n
while (l > 0) {
\nsize_t tail = (l > CHUNKSZ) ? CHUNKSZ : l;
\nWATCHDOG_RESET();
\nmemmove (to, from, tail);
\nto += tail;
\nfrom += tail;
\nl -= tail;
\n}
\n#else\u00a0\u00a0\u00a0\u00a0 \/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) *\/
\nmemmove ((void *) ntohl(hdr->ih_load), (uchar *)data, len);
\n#endif\u00a0\u00a0\u00a0\u00a0 \/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG *\/
\n}
\nbreak;
\ncase IH_COMP_GZIP:
\nprintf (”\u00a0\u00a0 Uncompressing %s … “, name);
\nif (gunzip ((void *)ntohl(hdr->ih_load), unc_len,
\n(uchar *)data, &len) != 0) {
\nputs (“GUNZIP ERROR – must RESET board to recover\\n”);
\nSHOW_BOOT_PROGRESS (-6);
\ndo_reset (cmdtp, flag, argc, argv);
\n}
\nbreak;
\n#ifdef CONFIG_BZIP2
\ncase IH_COMP_BZIP2:
\nprintf (”\u00a0\u00a0 Uncompressing %s … “, name);
\n\/*
\n* If we’ve got less than 4 MB of malloc() space,
\n* use slower decompression algorithm which requires
\n* at most 2300 KB of memory.
\n*\/
\ni = BZ2_bzBuffToBuffDecompress ((char*)ntohl(hdr->ih_load),
\n&unc_len, (char *)data, len,
\nCFG_MALLOC_LEN < (4096 * 1024), 0);
\nif (i != BZ_OK) {
\nprintf (“BUNZIP2 ERROR %d – must RESET board to recover\\n”, i);
\nSHOW_BOOT_PROGRESS (-6);
\nudelay(100000);
\ndo_reset (cmdtp, flag, argc, argv);
\n}
\nbreak;
\n#endif \/* CONFIG_BZIP2 *\/
\ndefault:
\nif (iflag)
\nenable_interrupts();
\nprintf (“Unimplemented compression type %d\\n”, hdr->ih_comp);
\nSHOW_BOOT_PROGRESS (-7);
\nreturn 1;
\n}
\nputs (“OK\\n”);
\nSHOW_BOOT_PROGRESS (7);<\/p>\n
switch (hdr->ih_type) {
\ncase IH_TYPE_STANDALONE:
\nif (iflag)
\nenable_interrupts();<\/p>\n
\/* load (and uncompress), but don’t start if “autostart”
\n* is set to “no”
\n*\/
\nif (((s = getenv(“autostart”)) != NULL) && (strcmp(s,”no”) == 0)) {
\nchar buf[32];
\nsprintf(buf, “%lX”, len);
\nsetenv(“filesize”, buf);
\nreturn 0;
\n}
\nappl = (int (*)(int, char *[]))ntohl(hdr->ih_ep);
\n(*appl)(argc-1, &argv[1]);
\nreturn 0;
\ncase IH_TYPE_KERNEL:
\ncase IH_TYPE_MULTI:
\n\/* handled below *\/
\nbreak;
\ndefault:
\nif (iflag)
\nenable_interrupts();
\nprintf (“Can’t boot image type %d\\n”, hdr->ih_type);
\nSHOW_BOOT_PROGRESS (-8);
\nreturn 1;
\n}
\nSHOW_BOOT_PROGRESS (8);<\/p>\n
#if defined(CONFIG_ZIMAGE_BOOT) || defined(CONFIG_IMAGE_BOOT)
\nafter_header_check:
\n#endif
\nswitch (hdr->ih_os) {
\ndefault:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* handled by (original) Linux case *\/
\ncase IH_OS_LINUX:
\n#ifdef CONFIG_SILENT_CONSOLE
\nfixup_silent_linux();
\n#endif
\ndo_bootm_linux\u00a0 (cmdtp, flag, argc, argv, \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/*\u5b9e\u9645\u8c03\u7528do_bootm_linux\u51fd\u6570\uff0c\u5728Armlinux.c\u4e2d\u5b9a\u4e49*\/
\naddr, len_ptr, verify);
\nbreak;
\ncase IH_OS_NETBSD:
\ndo_bootm_netbsd (cmdtp, flag, argc, argv,
\naddr, len_ptr, verify);
\nbreak;<\/p>\n
#ifdef CONFIG_LYNXKDI
\ncase IH_OS_LYNXOS:
\ndo_bootm_lynxkdi (cmdtp, flag, argc, argv,
\naddr, len_ptr, verify);
\nbreak;
\n#endif<\/p>\n
case IH_OS_RTEMS:
\ndo_bootm_rtems (cmdtp, flag, argc, argv,
\naddr, len_ptr, verify);
\nbreak;<\/p>\n
#if (CONFIG_COMMANDS & CFG_CMD_ELF)
\ncase IH_OS_VXWORKS:
\ndo_bootm_vxworks (cmdtp, flag, argc, argv,
\naddr, len_ptr, verify);
\nbreak;
\ncase IH_OS_QNX:
\ndo_bootm_qnxelf (cmdtp, flag, argc, argv,
\naddr, len_ptr, verify);
\nbreak;
\n#endif \/* CFG_CMD_ELF *\/
\n#ifdef CONFIG_ARTOS
\ncase IH_OS_ARTOS:
\ndo_bootm_artos\u00a0 (cmdtp, flag, argc, argv,
\naddr, len_ptr, verify);
\nbreak;
\n#endif
\n}<\/p>\n
SHOW_BOOT_PROGRESS (-9);
\n#ifdef DEBUG
\nputs (“\\n## Control returned to monitor – resetting…\\n”);
\ndo_reset (cmdtp, flag, argc, argv);
\n#endif
\nreturn 1;
\n}
\n\/*\u547d\u4ee4\u7684\u5b9a\u4e49\uff0c\u5728Command.c\u91cc\u9762find\u547d\u4ee4\u65f6\u4f1a\u627e\u5230\u8be5\u547d\u4ee4*\/
\nU_BOOT_CMD(
\nbootm,\u00a0\u00a0\u00a0\u00a0 CFG_MAXARGS,\u00a0\u00a0\u00a0\u00a0 1,\u00a0\u00a0\u00a0\u00a0 do_bootm,
\n“bootm\u00a0\u00a0 – boot application image from memory\\n”,
\n“[addr [arg …]]\\n\u00a0\u00a0\u00a0 – boot application image stored in memory\\n”
\n“\\tpassing arguments ‘arg …’; when booting a Linux kernel,\\n”
\n“\\t’arg’ can be the address of an initrd image\\n”
\n#ifdef CONFIG_OF_FLAT_TREE
\n“\\tWhen booting a Linux kernel which requires a flat device-tree\\n”
\n“\\ta third argument is required which is the address of the of the\\n”
\n“\\tdevice-tree blob. To boot that kernel without an initrd image,\\n”
\n“\\tuse a ‘-‘ for the second argument. If you do not pass a third\\n”
\n“\\ta bd_info struct will be passed instead\\n”
\n#endif
\n);<\/p>\n","protected":false},"excerpt":{"rendered":"
int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, cha …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[238,48,49],"class_list":["post-302","post","type-post","status-publish","format-standard","hentry","category-6","tag-cmd_bootm-c","tag-mini6410","tag-uboot"],"views":1543,"_links":{"self":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=302"}],"version-history":[{"count":2,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/302\/revisions"}],"predecessor-version":[{"id":304,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/302\/revisions\/304"}],"wp:attachment":[{"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=302"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-shu.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}