Ingo Molnar <[EMAIL PROTECTED]> wrote: > do you have any memories about the outb_p() use of misc_32.c: > > pos = (x + cols * y) * 2; /* Update cursor position */ > outb_p(14, vidport); > outb_p(0xff & (pos >> 9), vidport+1); > outb_p(15, vidport); > outb_p(0xff & (pos >> 1), vidport+1); > > was this ever needed? This is so early in the bootup that can we cannot > do any sensible delay. Perhaps we could try a natural delay sequence via > inb from 0x3cc: > > outb(14, vidport); > inb(0x3cc); /* delay */ > outb(0xff & (pos >> 9), vidport+1);
I've never seen code which would do that, and it was not suggested by any tutorial I ever saw. I'd expect any machine to break on all kinds of software if it required this. The only thing I remember being warned about is writing the index and the data register at the same time using outw, because that would write both registers at the same time on 16-bit-cards. BTW: The error function in linux-2.6.23/arch/i386/boot/compressed/misc.c uses while(1) without cpu_relax() in order to halt the machine. Is this fixed? Should it be fixed? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
