Re: PR/56434 CVS commit: src/sys/dev/pci

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR port-alpha/56434; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: Jason Thorpe <thorpej%me.com@localhost>
Cc: Jason Thorpe <thorpej%netbsd.org@localhost>,
    gnats-bugs%netbsd.org@localhost
Subject: Re: PR/56434 CVS commit: src/sys/dev/pci
Date: Mon, 20 Nov 2023 17:59:46 +0200

 Jason Thorpe wrote:
 > There is apparently no constraint on the address, only the length.
 
 http://ftp.parisc-linux.org/docs/chips/PC87415.pdf shows a 31-bit
 address and a hardcoded LSB of 0 in Table III, and the first
 paragraph on page 25 says "The Memory Region Physical Base Address
 is aligned on a 2 byte boundary".
 
 https://pdos.csail.mit.edu/6.828/2018/readings/hardware/IDE-BusMaster.pdf
 also has a hardcoded LSB of 0 in Figure 1.
 -- 
 Andreas Gustafsson, gson%gson.org@localhost