[Skiboot] [PATCH] memboot: Add a memboot flash backend

[Alistair Popple]

Ben,

Right. I'd forgotten we could just access that bit directly from skiboot. Once 
you've worked out where it is let me know and I'll update the patch.

Thanks.

- Alistair

On Tue, 24 Feb 2015 20:28:15 Benjamin Herrenschmidt wrote:
> On Tue, 2015-02-24 at 16:10 +1100, Alistair Popple wrote:
> > +bool ast_is_ahb_lpc_pnor(void)
> > +{
> > +       uint32_t hicr7;
> > +
> > +       /* Determine if the LPC->AHB bridge is pointing at PNOR or not
> > */
> > +       hicr7 = bmc_sio_ahb_readl(LPC_HICR7);
> > +       return (hicr7 & 0xffff0000) == (PNOR_FLASH_BASE & 0xffff0000);
> > +}
> > +
> 
> We are supposed to set a scratch register bit to indicate a memboot
> boot ... we need to 1) fix memboot to set it, and 2) use it :-)
> 
> It should be documented in the latest BMC requirement spec from Dean.
> 
> Cheers,
> Ben.