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| author | Francis Rowe <info@gluglug.org.uk> | 2015-03-31 23:00:28 +0100 |
|---|---|---|
| committer | Francis Rowe <info@gluglug.org.uk> | 2015-03-31 23:07:35 +0100 |
| commit | 75ee5e97c9be6c94ffa6ddf5f8e882bc4b1701b1 (patch) | |
| tree | 1fbdc6643eb1d8fded3e3498d0451a19a319e594 /docs/hcl/t500.html | |
| parent | 993f379175896ca0604ac860f24b9d93b89e1e74 (diff) | |
| download | librebootfr-75ee5e97c9be6c94ffa6ddf5f8e882bc4b1701b1.tar.gz librebootfr-75ee5e97c9be6c94ffa6ddf5f8e882bc4b1701b1.zip | |
ThinkPad T500 support
Diffstat (limited to 'docs/hcl/t500.html')
| -rw-r--r-- | docs/hcl/t500.html | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/docs/hcl/t500.html b/docs/hcl/t500.html new file mode 100644 index 00000000..6fee53da --- /dev/null +++ b/docs/hcl/t500.html @@ -0,0 +1,130 @@ +<!DOCTYPE html> +<html> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + + <style type="text/css"> + @import url('../css/main.css'); + </style> + + <title>ThinkPad T500</title> +</head> + +<body> + + <div class="section"> + <h1 id="pagetop">ThinkPad T500</h1> + + <p> + It is believed that all or most T500 laptops are compatible. + See notes about <a href="../install/t500_external.html#cpu_compatibility">CPU compatibility</a> + and <a href="../install/t500_external.html#switchable_graphics">switchable graphics</a> for + potential incompatibilities. + </p> + + <p> + There are two possible flash chip sizes for the R400: 4MiB (32Mbit) or 8MiB (64Mbit). + This can be identified by the type of flash chip below the palmrest: 4MiB is SOIC-8, 8MiB + is SOIC-16. + </p> + + <p> + <b>The T500 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it + by using a modified descriptor: see <a href="gm45_remove_me.html">gm45_remove_me.html</a></b> (contains notes, plus + instructions) + </p> + + <p> + Flashing instructions can be found at <a href="../install/index.html#flashrom">../install/index.html#flashrom</a> + </p> + + <p> + <a href="index.html">Back to previous index</a>. + </p> + </div> + + <div class="section"> + + <p> + Thi T500 is almost identical to the X200, code-wise. See <a href="x200.html">x200.html</a>. + </p> + + </div> + + <div class="section"> + + <h2 id="descriptor_difference"> + Descriptor and Gbe differences + </h2> + + <p> + See + <a href="../future/dumps/t500_x200_descriptor/descriptor_diff_t500_x200.txt">../future/dumps/t500_x200_descriptor/descriptor_diff_t500_x200.txt</a> + and + <a href="../future/dumps/t500_x200_descriptor/gbe_diff_t500_x200.txt">../future/dumps/t500_x200_descriptor/gbe_diff_t500_x200.txt</a> + </p> + + <p> + The patches above are based on the output from ich9deblob on a factory.rom image dumped from the T500 + with a SOIC-8 4MiB flash chip. The patch re-creates the X200 descriptor/gbe source, so the commands were + something like:<br/> + $ <b>diff -u t500gbe x200gbe</b><br/> + $ <b>diff -u t500descriptor x200descriptor</b> + </p> + + <p> + ME VSCC table is in a different place and a different size on the T500. Libreboot disables and removes the ME + anyway, so it doesn't matter. + </p> + + <p> + The very same descriptor/gbe used on the X200 (generated by <a href="gm45_remove_me.html#ich9gen">ich9gen</a>) + was re-used on the T500, and it still worked. + </p> + + </div> + + <div class="section"> + + <h2 id="regdumps">Hardware register dumps</h2> + + <p> + The coreboot wiki <a href="http://www.coreboot.org/Motherboard_Porting_Guide">shows</a> + how to collect various logs useful in porting to new + boards. Following are outputs from the T500: + </p> + + <ul> + <li> + T500 with <b>TODO: PUT FLASH CHIP HERE</b> flash chip (4MiB, SOIC-8) + and <b>TODO: PUT BIOS/EC VERSION HERE</b>: + <ul> + <li>TODO: put logs here</li> + </ul> + </li> + <li> + Version of flashrom used for the external flashing/reading logs is the one that libreboot git revision c164960 uses. + </li> + </ul> + + </div> + + <div class="section"> + + <p> + Copyright © 2015 Francis Rowe <info@gluglug.org.uk><br/> + This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions. + A copy of the license can be found at <a href="../license.txt">../license.txt</a>. + </p> + + <p> + This document is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See <a href="../license.txt">../license.txt</a> for more information. + </p> + + </div> + +</body> +</html> |