Re: Proposed changes to io.h

On Wed, Mar 31, 2004 at 10:44:25AM -0500, John Whitney wrote:

2. I'd like to add 64-bit __raw_readll and __raw_writell routines to
io.h, done using floating-point registers.  Currently, modules such as
MTD (when writing to 64-bit buses) perform two 32-bit, non-atomic
writes, which can cause problems.  Using a floating-point register to
guarantee a 64-bit write is ugly, but it works.  Code for these inlined
routines is as follows:

[snip]

I wonder will it work on 4xx CPUs which don't have floating point unit?

Eugene.


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/