On Saturday 11 March 2017 03:32 AM, Andrew F. Davis wrote:
I was once again going to try to sync the mode specific defconfigs with the main AM43xx defconfig when I decided it may make more sense to merge in USB host boot support in to the main defconfig.
The reason we had separate defconfigs before was that SPL needs to be placed in OCMC SRAM by the ROM when booting from USB as it uses DMA and ARM internal SRAM space is not externally accessible. All this means is we need to have our SPL load address be greater than 0x4030_0000 when USB booting. For other cases we use 0x402F_0000, this gives us an extra 64kB of space in addition to the 256kB of OCMC RAM, as our SPL is not even half this size currently this is not strictly needed.
Make all boot modes load to 0x4030_0000+, add SPL USB host boot support to the main am43xx defconfig, and then remove
This breaks all the supported peripheral boot modes. Have you tested UART/ethernet boot with this patch?
I specifically wanted a separate defconfig for usb_host as it is a special case and rest of the boot modes can be supported using a single defconfig. If you don't like this approach, please create separate defconfigs for peripheral and memory boot modes.
Thanks and regards, Lokesh