[U-Boot] [PATCH] arm: Add support for semihosting for armv8 fastmodel targets.

[Tom Rini]

On Wed, Mar 12, 2014 at 09:41:20AM -0700, Darwin Rambo wrote:
> 
> 
> On 14-03-12 09:24 AM, Tom Rini wrote:
> > On Wed, Mar 12, 2014 at 09:04:01AM -0700, Darwin Rambo wrote:
[snip]
> >> +	/* Assumes kernel is lower in memory than fdt */
> >> +	smh_load(CONFIG_KNLNAME, kernel_addr, fdt_addr - kernel_addr, 1);
> >> +
> >> +	/* Load fdt to memory */
> >> +	smh_load(CONFIG_FDTNAME, fdt_addr, 0x20000, 1);
> >> +
> >> +	/* Load initrd to memory */
> >> +	smh_load(CONFIG_RDNAME, initrd_addr, initrd_size, 1);
> > 
> > Is there a reason we can't also get these from the environment?  Or a
> > limitation of (how we support) the simulator that we don't have
> > persistent r/w environment right now?
> These names can also come from the environment, there's r/w capability
> there, just no physical eMMC. Thanks.

I need to play more with the foundation model then, I didn't think we
could talk with the "mmc" or anything on it.  As you've got it coded
now, you can't change what's loaded here :)  But if we can have a
file-backed storage used as the "disk" and keep env there, making this
load files named in the environment and then fw_getenv/setenv can change
the values from Linux too, if we don't boot into a full U-Boot at some
point.

-- 
Tom
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