On 03/13/2017 03:34 PM, Tim Harvey wrote:
Greetings,
I'm working with some boards with eMMC FLASH and understand that I can
set the fields of the PARTITION_CONFIG with the 'mmc partconf' command
to specify what partition is used for boot. Once I do that to set the
boot0 partition for example, how can I access that partition from
within u-boot via mmc read/write? In Linux the kernel provides access
to user/boot0/boot1/rpmb via different devices, but I don't see u-boot
doing that.
The "mmc dev" command can be used to select which MMC device to operate
on. The "typical" command "mmc dev 0" selects the main partition on MMC
device 0 for later MMC-specific commands such as "mmc read". You can add
an extra parameter to that command to request a specific HW partition,
e.g. "mmc dev 0 1" selects boo0 of MMC device 0 and "mmc dev 0 2"
selects boot1.
A similar naming scheme exists for commands that take a complete device
specification each time. For example, "part list mmc 0" to list
partitions in the main partition on MMC device 0, or "part list mmc 0.1"
to list partitions on boot0 of MMC device 0.
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