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Dirk Behmef904cdb2009-01-27 18:19:12 +01001
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
Dirk Behme9d0fc812009-01-28 21:39:57 +010014* Gumstix Overo [3]
15
Dirk Behmef904cdb2009-01-27 18:19:12 +010016Toolchain
17=========
18
19While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile
20with -march=armv5 to allow more compilers to work. For U-Boot code this has
21no performance impact.
22
23Build
24=====
25
26* BeagleBoard:
27
28make omap3_beagle_config
29make
30
Dirk Behme9d0fc812009-01-28 21:39:57 +010031* Gumstix Overo:
32
33make omap3_overo_config
34make
35
Dirk Behmef904cdb2009-01-27 18:19:12 +010036Custom commands
37===============
38
39To make U-Boot for OMAP3 support NAND device SW or HW ECC calculation, U-Boot
40for OMAP3 supports custom user command
41
42nandecc hw/sw
43
44To be compatible with NAND drivers using SW ECC (e.g. kernel code)
45
46nandecc sw
47
48enables SW ECC calculation. HW ECC enabled with
49
50nandecc hw
51
52is typically used to write 2nd stage bootloader (known as 'x-loader') which is
53executed by OMAP3's boot rom and therefore has to be written with HW ECC.
54
55For all other commands see
56
57help
58
59Acknowledgements
60================
61
Dirk Behme9d0fc812009-01-28 21:39:57 +010062OMAP3 U-Boot is based on U-Boot tar ball [4] for BeagleBoard and EVM done by
Dirk Behmef904cdb2009-01-27 18:19:12 +010063several TI employees.
64
65Links
66=====
67
68[1] OMAP3:
69
70http://www.ti.com/omap3 (high volume) and
71http://www.ti.com/omap35x (broad market)
72
73[2] OMAP3530 BeagleBoard:
74
75http://beagleboard.org/
76
Dirk Behme9d0fc812009-01-28 21:39:57 +010077[3] Gumstix Overo:
78
79http://www.gumstix.net/Overo/
80
81[4] TI OMAP3 U-Boot:
Dirk Behmef904cdb2009-01-27 18:19:12 +010082
83http://beagleboard.googlecode.com/files/u-boot_beagle_revb.tar.gz