How to Boot X-Loader and U-Boot from NAND on the Logic PD OMAP35x/DM37x Torpedo and SOM-LV

This document describes the method for copying the X-Loader (MLO) and U-Boot images from a bootable SD card to the NAND flash on a Logic PD OMAP35x/DM37x Torpedo or SOM-LV board.

Prerequisites

X-Loader/U-Boot running from an SD card. See the Timesys Getting Started Guide for your board for instructions to generate this card.

Procedure

Erase the NAND Flash
```
nand erase.chip
```
Initialize the SD/MMC card
```
mmc init
```

Load X-Loader into NAND

First, clear the RAM location
```
mw.l ${loadaddr} 0xFFFFFFFF 0x400000
```
Next, copy the X-Loader file into RAM
```
fatload mmc 1 ${loadaddr} mlo
```
Choose the Hardware ECC algorithm
```
nandecc hw
```

Burn X-Loader to NAND flash. We must burn the same copy of X-Loader to each of the first four blocks.

nand write ${loadaddr} 0x00000000 0x00020000
nand write ${loadaddr} 0x00020000 0x00020000
nand write ${loadaddr} 0x00040000 0x00020000
nand write ${loadaddr} 0x00060000 0x00020000

Load U-Boot into NAND

Clear the RAM location
```
mw.l ${loadaddr} 0xFFFFFFFF 0x400000
```
Load U-Boot from the SD Card to RAM
```
fatload mmc 1 ${loadaddr} u-boot.bin
```
Set the ECC to the default
```
nandecc ${defaultecc}
```

Burn U-Boot to NAND flash

nand write.i ${loadaddr} 0x00080000 0x00080000