lkml.org 
[lkml]   [2001]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: isa_* problems (hgafb is broken since 2.4.13)

> I have two questions about asm-i386/io.h:
> 1. Why #define __ISA_IO_base ((char *)(PAGE_OFFSET)) ?
> 2. Why not #define __ISA_IO_base ((char *)0) ?

For ix86 the ISA IO space start is at the very begining of memory. On
other platforms like the PPC the ISA IO space is seperate from the
regular memory space. It starts after the regular memory space thus the
__ISA_IO_base will not be 0x0.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:13    [W:0.043 / U:1.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site