RE: [PATCH] Automatic RAM detection for VT8601

As for reset, 
you may can do it by asserting "Software PCI reset" on configuration space
of PCI-to-ISA bridge.

Heechul
> -----Original Message-----
> From: SONE Takeshi [mailto:[e-mail]]
> Sent: Tuesday, May 20, 2003 5:29 PM
> To: [e-mail]
> Cc: [e-mail]
> Subject: Re: [PATCH] Automatic RAM detection for VT8601
>
> On Tue, May 20, 2003 at 02:15:23PM +0900, [e-mail] wrote:
> > I have a question about ADLO. My LinuxBIOS + etherboot +
>
> ADLO go through
> > to ADLO, but stop at " sti " instruction  before jumping to
>
> Bochs BIOS.
> > I look up "sti" from Intel IA32 Instruction set Volume 2.
>
> I read that
> > "sti" is "protected mode virtual interrupt enable".
> >
> > I removed "sti" from ADLO because it is real mode. 
> > Does It affect badly to my EPIA operation ?
>
> sti should also work in real mode.
> > ps.> If I reset my system with LinuxBIOS after booting it
>
> with PC BIOS,
> > it works great.
>
> Linux's reboot code sometimes doesn't work for some reason.
> (I think it resets only CPU)
>
> I wrote a small program to directly hit the power management device
> found in EPIA to reset the system, not only CPU.
> It works for me.
> Changing 0x29 to 0x28 makes it power off instead of reboot.
> See southbridge manual for detail. (0x4000 is PM base)
> --
> Takeshi
>
> #include <sys/io.h>
>
> main()
> {
>     iopl(3);
>     outb(0xff, 0x4001);
>     printf("01=%x\n", inb(0x4001));
>     outb(0x20, 0x4005);
>     printf("05=%x\n", inb(0x4005));
>     outw(0xff, 0x4020);
>     printf("20=%x\n", inw(0x4020));
>     outb(0x29, 0x4005);
> //    while ((inb(0x4001) & 1) == 0)
> //        sleep(2);
> }
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