u-boot/doc/README.nokia_rx51

1 Board: Nokia RX-51 aka N900
3 This board definition results in a u-boot.bin which can be chainloaded
9 onenand as such. This u-boot is intended to be flashed to the N900 like
11 appended to u-boot.bin at 0x40000. NOLO will load the entire image into
12 (random) memory and execute u-boot, which saves hw revision, boot reason
14 uImage or boot.scr from a fat, ext2/ext3 or ext4 filesystem in external
20 NOLO so u-boot must kick watchdog to prevent reboot device (but not very
25 When U-Boot is starting it enable IBE bit in Auxiliary Control Register,
26 which is needed for Thumb-2 ISA support. It is workaround for errata 430973.
31  * 1. try boot from external SD card
40    * 1.3 same order for 2. - 4. fat partition
47  * run sercon - Use serial port for control
48  * run usbcon - Use usbtty for control
49  * run vgacon - Use framebuffer and HW keyboard for control (default)
51  * run sdboot - Boot from external SD card (see boot order)
52  * run emmcboot - Boot from internal eMMC memory (see boot order)
53  * run attachboot - Boot attached kernel image (attached to U-Boot binary)
55  * run scriptload - Load boot script ${mmcscriptfile}
56  * run scriptboot - Run loaded boot script
57  * run kernload - Load kernel image ${mmckernfile}
58  * run initrdload - Load initrd image ${mmcinitrdfile}
59  * run kernboot - Boot loaded kernel image
60  * run kerninitrdboot - Boot loaded kernel image with loaded initrd image
62  * run trymmcscriptboot - Try to load and boot script ${mmcscriptfile}
63  * run trymmckernboot - Try to load and boot kernel image ${mmckernfile}
64  * run trymmckerninitrdboot - Try to load and boot kernel image ${mmckernfile}
69  * mmc ${mmcnum} (0 - external, 1 - internal)
70  * partition number ${mmcpart} (1 - 4)
75  * setup_omap_atag - Add OMAP table into atags structure (needs maemo kernel)
76  * setup_console_atag - Enable serial console in OMAP table
77  * setup_boot_reason_atag - Change boot reason in OMAP table
78  * setup_boot_mode_atag - Change boot mode in OMAP table
82  Maemo kernel 2.6.28 will crash if u-boot enable usb tty. So USB TTY is disabled.
99  UBIFS support is disabled, because U-Boot image is too big and cannot be
100  flashed with attached zImage to RX-51 kernel nand area. For enabling UBIFS