On Dec 13, 2007 6:59 PM, David P. Reed <[email protected]> wrote:
> Replace use of outb to "unused" diagnostic port 0x80 for time delay
> with udelay based time delay on x86_64 architecture machines. Fix for
> bugs 9511 and 6307 in bugzilla, plus bugs reported in
> bugzilla.redhat.com.
>
> Derived from suggestion (that didn't compile) by Pavel Machek, and
> tested, also based on measurements of typical timings of out's
> collated by Rene Herman from many in the community.
>
> This patch fixes a number of bugs known to cause problems on HP
> Pavilion dv9000z and dv6000z laptops - in the form of solid freezes
> when hwclock is used to show or set the time. Also, it potentially
> improves bus utilization on SMP machines, by using a waiting process
> that doesn't tie up the ISA/LPC bus for 1 or 2 microseconds.
>
> i386 family fixes (completely parallel) were not included, considering
> that such machines might involve more risk of problems on legacy machines.
>
> Signed-off-by: David P. Reed <[email protected]>
>
> Index: linux-2.6/arch/x86/boot/compressed/misc_64.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/boot/compressed/misc_64.c
> +++ linux-2.6/arch/x86/boot/compressed/misc_64.c
> @@ -269,10 +269,10 @@ static void putstr(const char *s)
> RM_SCREEN_INFO.orig_y = y;
>
> 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);
> + outb(14, vidport);
> + outb(0xff & (pos >> 9), vidport+1);
> + outb(15, vidport);
> + outb(0xff & (pos >> 1), vidport+1);
> }
>
> static void* memset(void* s, int c, unsigned n)
> Index: linux-2.6/include/asm/io_64.h
> ===================================================================
> --- linux-2.6.orig/include/asm/io_64.h
> +++ linux-2.6/include/asm/io_64.h
include/asm-x64/io_64.h ?
YH
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