diff options
Diffstat (limited to 'doc')
-rw-r--r-- | doc/README.nmdk8815 | 22 | ||||
-rw-r--r-- | doc/README.omap3 | 116 |
2 files changed, 138 insertions, 0 deletions
diff --git a/doc/README.nmdk8815 b/doc/README.nmdk8815 new file mode 100644 index 0000000..453cfae --- /dev/null +++ b/doc/README.nmdk8815 @@ -0,0 +1,22 @@ + +The Nomadik 8815 CPU has a "secure" boot mode where no external access +(not even JTAG) is allowed. The "remap" bits in the evaluation board +are configured in order to boot from the internal ROM memory (in +secure mode). + +The boot process as defined by the manufacturer executes external code +(loaded from NAND or OneNAND) that that disables such "security" in +order to run u-boot and later the kernel without constraints. Such +code is a proprietary initial boot loader, called "X-Loader" (in case +anyone wonders, it has no relations with other loaders with the same +name and there is no GPL code inside the ST X-Loader). + +SDRAM configuration, PLL setup and initial loading from NAND is +implemented in the X-Loader, so U-Boot is already running in SDRAM +when control is handed over to it. + + +On www.st.com/nomadik and on www.stnwireless.com there are documents, +summary data and white papers on Nomadik. The full datasheet for +STn8815 is not currently available on line but under specific request +to the local ST sales offices. diff --git a/doc/README.omap3 b/doc/README.omap3 new file mode 100644 index 0000000..1ba307f --- /dev/null +++ b/doc/README.omap3 @@ -0,0 +1,116 @@ + +Summary +======= + +This README is about U-Boot support for TI's ARM Cortex-A8 based OMAP3 [1] +family of SoCs. TI's OMAP3 SoC family contains an ARM Cortex-A8. Additionally, +some family members contain a TMS320C64x+ DSP and/or an Imagination SGX 2D/3D +graphics processor and various other standard peripherals. + +Currently the following boards are supported: + +* OMAP3530 BeagleBoard [2] + +* Gumstix Overo [3] + +* TI EVM [4] + +* OpenPandora Ltd. Pandora [5] + +* TI/Logic PD Zoom MDK [6] + +Toolchain +========= + +While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile +with -march=armv5 to allow more compilers to work. For U-Boot code this has +no performance impact. + +Build +===== + +* BeagleBoard: + +make omap3_beagle_config +make + +* Gumstix Overo: + +make omap3_overo_config +make + +* TI EVM: + +make omap3_evm_config +make + +* Pandora: + +make omap3_pandora_config +make + +* Zoom MDK: + +make omap3_zoom1_config +make + +Custom commands +=============== + +To make U-Boot for OMAP3 support NAND device SW or HW ECC calculation, U-Boot +for OMAP3 supports custom user command + +nandecc hw/sw + +To be compatible with NAND drivers using SW ECC (e.g. kernel code) + +nandecc sw + +enables SW ECC calculation. HW ECC enabled with + +nandecc hw + +is typically used to write 2nd stage bootloader (known as 'x-loader') which is +executed by OMAP3's boot rom and therefore has to be written with HW ECC. + +For all other commands see + +help + +Acknowledgements +================ + +OMAP3 U-Boot is based on U-Boot tar ball [7] for BeagleBoard and EVM done by +several TI employees. + +Links +===== + +[1] OMAP3: + +http://www.ti.com/omap3 (high volume) and +http://www.ti.com/omap35x (broad market) + +[2] OMAP3530 BeagleBoard: + +http://beagleboard.org/ + +[3] Gumstix Overo: + +http://www.gumstix.net/Overo/ + +[4] TI EVM: + +http://focus.ti.com/docs/toolsw/folders/print/tmdxevm3503.html + +[5] OpenPandora Ltd. Pandora: + +http://openpandora.org/ + +[6] TI/Logic PD Zoom MDK: + +http://www.logicpd.com/products/devkit/ti/zoom_mobile_development_kit + +[7] TI OMAP3 U-Boot: + +http://beagleboard.googlecode.com/files/u-boot_beagle_revb.tar.gz |