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Date: Mon, 8 Dec 2008 17:50:24 -0800
From: Andrew Sharp <andy.sharp@onstor.com>
To: Maxim Kozlovsky <maxim.kozlovsky@onstor.com>
Cc: Bill Fisher <bfisher@onstor.com>
Subject: Re: code to export memory through pci
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OK, Auntie M, any particular chunk of contiguous memory?  And after
that, what do we do with it?  I'll do the first part, Bill will do the
second part.

On Mon, 8 Dec 2008 17:47:44 -0800 Maxim Kozlovsky
<maxim.kozlovsky@onstor.com> wrote:

> Well Dorothy, you are not on the SSC anymore.
> 
> >-----Original Message-----
> >From: Andy Sharp
> >Sent: Monday, December 08, 2008 5:46 PM
> >To: Maxim Kozlovsky
> >Cc: Bill Fisher
> >Subject: Re: code to export memory through pci
> >
> >On Mon, 8 Dec 2008 17:23:29 -0800 Maxim Kozlovsky
> ><maxim.kozlovsky@onstor.com> wrote:
> >
> >> When the prom loading it has the range starting from 0x83000000
> >> exported, which is where the kernel is loaded. After the kernel
> >> boots it should allocate a contiguous 16mb chunk of memory, map it
> >> locally and export it through PCI by executing this magic sequence.
> >
> >We never did anything like that on the SSC.  That I know of.
> >
> >> >-----Original Message-----
> >> >From: Andy Sharp
> >> >Sent: Monday, December 08, 2008 5:18 PM
> >> >To: Maxim Kozlovsky
> >> >Cc: Bill Fisher
> >> >Subject: Re: code to export memory through pci
> >> >
> >> >Doesn't the prom set it up that way for us?
> >> >
> >> >On Mon, 8 Dec 2008 16:56:53 -0800 Maxim Kozlovsky
> >> ><maxim.kozlovsky@onstor.com> wrote:
> >> >
> >> >> Code/sm-pci/pci-init.c ~100
> >> >>
> >> >>     pci_cfg_write(0, 0, 0, PHB_EXTCONFIGDIS, 1);
> >> >>
> >> >>     /* Each PCI configuration register from 0x44 to 0x80
> >> >> provides access to
> >> >>      * 1MB of memory, 0x1 is enable bit.
> >> >>          */
> >> >>         uintptr_t pci_phys_start = virt_to_phys(LOCAL_MEM);
> >> >>         uintptr_t pci_phys_end = pci_phys_start + 16 * 1024 *
> >> >> 1024; uintptr_t addr;
> >> >>     int n;
> >> >>
> >> >>         for (addr = pci_phys_start, n = 0;
> >> >>                   addr < pci_phys_end;
> >> >>                   addr += 1024 * 1024, n++) {
> >> >>                 pci_cfg_write(0, 0, 0, R_BCM1480_PHB_MAP(n),
> >> >> (addr
> >> >> >> 8) | 0x1); }
> >> >>
> >> >>         /* Disable access to map registers.
> >> >>          */
> >> >>     pci_cfg_write(0, 0, 0, PHB_EXTCONFIGDIS, 0);
> >> >>
