![]() */ 0, /* Number of repeats of orders*/ do_copyenv, /* command processing function*/ "Imprint environmental variables from SD cards to EMC", /* Short hint*/ "\n" "Imprint environmental variables from SD cards to EMMC\n" /* Full hint*/ "Note: The command applies \n when the development panel starts with a SD card. U-Boot's command set, and the typical environment variables used in U-Boot. First, it sets the bootargs environment variable, which U-Boot passes to the kernel as its. Using the U-Boot Bootloader A growing majority of embedded Linux devices is. To boot a Linux kernel image without a initrd ramdisk image. # include # include # define GPD0CON (*( volatile unsigned int *) 0x114, 000A0 ) / Define address of the beeper IO # define GPD0DAT (*( volatile unsigned int *) 0x114000A4 ) int do_beep ( cmd_tbl_t * cmdtp, int flag, int argc, char * const argv ) U_BOOT_CMD ( capyenv, /* name of the command*/ 1, / * Max. In turn, this environment variable is a set of commands of its own. In this case the bootm command consists of three steps: first the Linux kernel image is uncompressed and copied into RAM, then the ramdisk image is loaded to RAM, and finally control is passed to the Linux kernel, passing information about the location and size of the ramdisk image.
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