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version 1.259, 2008/03/12 23:36:07

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OpenBSD 3.0 was the first official release of OpenBSD/sparc64, and since

that release support for many more devices has been added (including

devices required for X11R6 support) and bugs exposed by the 64 bit big endian

devices required for X11R6 support). The rest of the architectures that

nature of UltraSPARC in many obscure places have been fixed.

OpenBSD supports have benefitted because some kinds of bugs are

exposed more often by the 64-bit big endian nature of UltraSPARC.

Sun refused access to the neccessary documentation for the (very bizzare)

host bridge in the UltraSPARC III machines, so a few years were lost before

host bridge and caches in the UltraSPARC III machines, so a few years were

some reverse engineering figured out the changes in these machines.

lost before some reverse engineering figured out the changes in these

OpenBSD 4.0 has thus been the first release to ship with support for the

machines (and the undocumented processor bugs, too). In 2007, Sun

<a href="#hwdocs">was finally convinced</a> to release the missing

information, and development progress became more rapid.

OpenBSD 4.0 was the first release to ship with support for the

UltraSPARC III based machines.

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<li>Fix BE64 issues in the userland as they are discovered

<li>Improve architecture specific documentation

<li>Provide accelerated X servers for the cgsix and creator frame buffers

<li>Fix the CDROM interrupt spin that some machines see.

<li>Fix the vga / schizo crashes that occur on some machines.

</ul>

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<h3>Hardware documentation:</h3>

Previous to 2007, it was extremely difficult or impossible to get much of

the neccessary hardware documentation for these machines. Members of our

team (in particular David Gwynne) were instrumental in pressuring and

convincing Sun to go back into their archives and dig up the data sheets

that they had written in-house, describing the operation of their chips to

their own engineers. These documents can now be found at

http://wikis.sun.com/display/FOSSdocs/Home</a>.

Some documents are still missing at that site, so we ask that interested

developers contact Sun and request additional information.

This list has been originally posted by Marcus Watts to the sparc mailing list.

<ul>

<li>UltraSPARC User's manual - UltraSPARC-I, II <a href="http://www.sun.com/processors/manuals/802-7220-02.pdf">(PDF)</a>

<li>UltraSPARC-IIi - User's Manual <a href="http://www.sun.com/processors/manuals/805-0087.pdf">(PDF)</a>

<li>UltraSPARC IIi User's Manual - Addendum <a href="http://www.sun.com/processors/manuals/ultrasparc-IIi_add.pdf">(PDF)</a>

<li>The SPARC Architecture Manual Version 9 <a href="http://www.sparc.org/standards/v9.ps.Z">(PostScript)</a>

<li>Implementation Characteristics of Current SPARC-V9-based Products <a href="http://www.sparc.org/standards/SPARCV9.pdf">(PDF)</a>

<li>VIS Instruction Set - User's Manual <a href="http://www.sun.com/processors/manuals/805-1394.pdf">(PDF)</a>

</ul>

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