Messages in this thread | | | Date | Fri, 15 Mar 2002 13:52:40 +0100 | From | Andi Kleen <> | Subject | Re: IO delay, port 0x80, and BIOS POST codes |
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On Fri, Mar 15, 2002 at 01:47:39PM +0100, Martin Wilck wrote: > On 15 Mar 2002, Andi Kleen wrote: > > > > It doesn't even have to be a config option - a line > > > > > > /* Port used for dummy writes for I/O delays */ > > > /* Change this only if you know what you're doing ! */ > > > #define DUMMY_IO_PORT 0x80 > > > > > > in a header file would perfectly suffice. > > > > That effectively already exists. You just need to change the __SLOW_DOWN_IO > > macro in include/asm-i387/io.h > > No, that doesn't cover all accesses to port 80. I am still searching.
It should. I would consider all other accesses a bug. It is possible that some driver used it for private debugging and left it in by mistake. These should be removed.
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