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Added MMCR reset functionality 

Reset function specific to AMD SC520 microcontroller - Is more of a
'hard reset' that the triple fault.

Requires CONFIG_SYS_RESET_SC520 to be defined in config

I would have liked to add this to a new file (cpu/i386/sc520/reset.c)
but ld requires that a object file in a library arhive MUST contain
at least one function which does not override a weak function (and is
called from outside the object file) in order for that object file to
be extracted from the archive. This would be the only function on the
new file, and hence, will never get linked in.

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
This commit is contained in:
Graeme Russ 2008-12-07 10:29:03 +11:00 committed by Wolfgang Denk
parent 3f5f18d12d
commit ead056bc20
1 changed files with 10 additions and 0 deletions
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10
cpu/i386/sc520.c
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@ -507,4 +507,14 @@ u8 ssi_rx_byte(void)
return read_mmcr_byte(SC520_SSIRCV);
}
#ifdef CONFIG_SYS_RESET_SC520
void reset_cpu(ulong addr)
{
printf("Resetting using SC520 MMCR\n");
/* Write a '1' to the SYS_RST of the RESCFG MMCR */
write_mmcr_word(SC520_RESCFG, 0x0001);
/* NOTREACHED */
}
#endif
#endif /* CONFIG_SC520 */