lkml.org 
[lkml]   [2007]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.
    David P. Reed wrote:
    >
    > Note that I can run the port 80 test once, the second time I get the
    > hard freeze. I didn't try writing to port 70 from userspace - that
    > one's dangerous, but the reading of it was included for a timing typical
    > of a chipset supported device. These are all pretty consistent.
    >
    > I find the "read" timing from 0x80 verrrrry interesting. The write
    > timeing is also interesting, being faster than an unused port.
    >

    Once again: reading from port 0x80 goes to the DMA page device.

    -hpa


    \
     
     \ /
      Last update: 2007-12-17 22:25    [W:0.022 / U:0.016 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site