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 14* Gumstix Overo [3] 15 16* TI EVM [4] 17 18* OpenPandora Ltd. Pandora [5] 19 20Toolchain 21========= 22 23While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile 24with -march=armv5 to allow more compilers to work. For U-Boot code this has 25no performance impact. 26 27Build 28===== 29 30* BeagleBoard: 31 32make omap3_beagle_config 33make 34 35* Gumstix Overo: 36 37make omap3_overo_config 38make 39 40* TI EVM: 41 42make omap3_evm_config 43make 44 45* Pandora: 46 47make omap3_pandora_config 48make 49 50Custom commands 51=============== 52 53To make U-Boot for OMAP3 support NAND device SW or HW ECC calculation, U-Boot 54for OMAP3 supports custom user command 55 56nandecc hw/sw 57 58To be compatible with NAND drivers using SW ECC (e.g. kernel code) 59 60nandecc sw 61 62enables SW ECC calculation. HW ECC enabled with 63 64nandecc hw 65 66is typically used to write 2nd stage bootloader (known as 'x-loader') which is 67executed by OMAP3's boot rom and therefore has to be written with HW ECC. 68 69For all other commands see 70 71help 72 73Acknowledgements 74================ 75 76OMAP3 U-Boot is based on U-Boot tar ball [6] for BeagleBoard and EVM done by 77several TI employees. 78 79Links 80===== 81 82[1] OMAP3: 83 84http://www.ti.com/omap3 (high volume) and 85http://www.ti.com/omap35x (broad market) 86 87[2] OMAP3530 BeagleBoard: 88 89http://beagleboard.org/ 90 91[3] Gumstix Overo: 92 93http://www.gumstix.net/Overo/ 94 95[4] TI EVM: 96 97http://focus.ti.com/docs/toolsw/folders/print/tmdxevm3503.html 98 99[5] OpenPandora Ltd. Pandora: 100 101http://openpandora.org/ 102 103[6] TI OMAP3 U-Boot: 104 105http://beagleboard.googlecode.com/files/u-boot_beagle_revb.tar.gz 106