1 2Summary 3======= 4 5This README is about U-Boot support for TI's ARM Cortex-A8 based OMAP3 [1] 6family of SoCs. TI's OMAP3 SoC family contains an ARM Cortex-A8. Additionally, 7some family members contain a TMS320C64x+ DSP and/or an Imagination SGX 2D/3D 8graphics processor and various other standard peripherals. 9 10Currently the following boards are supported: 11 12* OMAP3530 BeagleBoard [2] 13 14Toolchain 15========= 16 17While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile 18with -march=armv5 to allow more compilers to work. For U-Boot code this has 19no performance impact. 20 21Build 22===== 23 24* BeagleBoard: 25 26make omap3_beagle_config 27make 28 29Custom commands 30=============== 31 32To make U-Boot for OMAP3 support NAND device SW or HW ECC calculation, U-Boot 33for OMAP3 supports custom user command 34 35nandecc hw/sw 36 37To be compatible with NAND drivers using SW ECC (e.g. kernel code) 38 39nandecc sw 40 41enables SW ECC calculation. HW ECC enabled with 42 43nandecc hw 44 45is typically used to write 2nd stage bootloader (known as 'x-loader') which is 46executed by OMAP3's boot rom and therefore has to be written with HW ECC. 47 48For all other commands see 49 50help 51 52Acknowledgements 53================ 54 55OMAP3 U-Boot is based on U-Boot tar ball [3] for BeagleBoard and EVM done by 56several TI employees. 57 58Links 59===== 60 61[1] OMAP3: 62 63http://www.ti.com/omap3 (high volume) and 64http://www.ti.com/omap35x (broad market) 65 66[2] OMAP3530 BeagleBoard: 67 68http://beagleboard.org/ 69 70[3] TI OMAP3 U-Boot: 71 72http://beagleboard.googlecode.com/files/u-boot_beagle_revb.tar.gz 73