On Fri, 2005-04-22 at 18:41 +0200, Michael Schmitz wrote:
> > Hi,
> >
> > Here is the output of lsprop /proc/device-tree
> > ----------------------------------------------------
> > name "device-tree"
> > model "Power Macintosh"
> > compatible "AAPL,e407"
> > "MacRISC"
> >
> > /proc/device-tree/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL PROTECTED]:
> > name "nvram"
> > device_type "nvram"
> > reg 00060000 00020000
> > existing 00000000 00002000
> > linux,phandle ff8376c0
>
> That's more or less what I have ... the nvram hangs off mac-io or ohare on
> the oldworld macs. On newworld macs it appears as a node in the device
> tree directly.
>
> > and the output of the modified nvsetvol :
> > --------------------------------------------------------------
> > mac:~# ./nvsetvol
> > offset 3839 rc 16 buf.sig 0 buf.len 237 buf.name >Šboot /AAP<
> > offset: 7631 1dcf
> > no PRAM found: Success
> >
> > mac:~# ./nvsetvol 4
> > offset 3839 rc 16 buf.sig 0 buf.len 237 buf.name >Šboot /AAP<
> > offset: 7631 1dcf
> > no PRAM found: Success
> > --------------------------------------------------------------
>
> BenH: the above debug output prints some of the fields of the nvram header
> struct:
>
> typedef struct {
> unsigned char sig;
> unsigned char cksum;
> unsigned short len;
> char name[12];
> } header;
>
> which, on oldworld, doesn't seem to work at all. Hence, the search for a
> header holding the string "APL,MacOS75" fails. On my Powerbook, the output
> is:
>
> offset 0 rc 16 buf.sig 90 buf.len 2 buf.name >nvram<
> offset 32 rc 16 buf.sig 95 buf.len 62 buf.name >system<
> offset 1024 rc 16 buf.sig 112 buf.len 193 buf.name >common<
> offset 4112 rc 16 buf.sig 160 buf.len 82 buf.name >APL,MacOS75<
> PRAM found at offset: 4112 1010
>
> How is the startup volume encoded in the oldworld nvram?
Hrm.. I don't remember at the top of my head, have you tried using the
ioctl to request the kernel to tell you where the pram here ? on old
world, the startup volume can either be the OF boot device, which is a
normal OF partition (nvsetenv works on oldworld afaik), or you can try
to encode the "MacOS" boot volume but that's a very complicated story...
Ben.
