update docs/maintain to match Canoeboot 20241207

Signed-off-by: Leah Rowe <info@minifree.org>

site/docs/maintain/index.md

@@ -278,6 +278,18 @@ convenience of users, and this is copied to release archives. Flashrom is the
 program that you will use to read, erase and write the flash, containing
 coreboot firmware.
 
+src/gpio-scripts
+----------------
+
+This is a fork of the original gpio-scripts. The fork is maintained by Riku
+Viitanen, based on code written by Angel Pons (author of the Haswell native
+raminit patches and many other excellent works), but Riku's version parses
+the inteltool log files. This is useful for adapting GPIO configs on Intel
+machines, when porting new boards to coreboot.
+
+NOTE: Not included in Canoeboot yet, but `intelp2m` is used instead for this
+purpose, on much newer Intel systems (from around Skylake era or later).
+
 src/grub/TREE
 ---------------
 
@@ -312,6 +324,15 @@ tree contains NVMe SSD support but not xHCI support. The `default` tree contains
 no NVMe or xHCI support. All trees otherwise have the same fixes on top of
 upstream GRUB, e.g. fix for Dell Latitude keyboard controllers.
 
+src/int/
+--------
+
+Riku Viitanen wrote this tool for debugging, when implementing MXM option ROM
+support in coreboot and SeaBIOS, for the HP EliteBook 8560w.
+
+NOTE: The EliteBook 8560w isn't actually supported in Canoeboot yet, but this
+could be used for other boards in the future.
+
 src/memtest86plus/
 ---------------
 
@@ -320,6 +341,23 @@ Please also visit: <https://www.memtest.org/>
 This is provided inside ROM images, as a payload executed from main GRUB or
 SeaBIOS payload. It checks for corrupted memory.
 
+src/mxmdump/
+------------
+
+Riku Viitanen wrote this utility, for dumping the MXM config on graphics cards
+that use it. The HP EliteBook 8560w uses these cards, and normally you would
+just run a VGA option ROM to get a display at boot time. The MXM cards
+additionally contain a configuration called MXM, which basically describes
+ports and several power management capabilities.
+
+MXM data is loaded via an INT15H handler, which Riku also implemented in
+SeaBIOS. If the MXM data is not handled, the VGA option ROM (when executed)
+will often complain and refuse to boot; some of them can be hacked to bypass
+this fact, but such hacks are no longer required because of Riku's tool.
+
+NOTE: The EliteBook 8560w isn't supported in Canoeboot yet, but this tool
+could be used for other machines in the future.
+
 src/seabios/
 ---------------
 
@@ -346,6 +384,23 @@ provides UEFI. Information about that can be found on these resources:
 
 This is currently the only payload on *ARM* systems, within Canoeboot.
 
+U-Boot is also available on x86 machines, since the Libreboot 20241205 release.
+More information can be found on the [U-Boot x86 page](../install/uboot-x86.md);
+it is available as an alternative to the traditional SeaBIOS and GRUB payloads,
+and it can successfully boot UEFI applications on x86 Canoeboot systems.
+
+src/pcsx-redux
+----------------
+
+PCSX-Redux is a Sony Playstation (PS1/PSX) emulator, but Canoeboot only uses
+one part from it: the Open BIOS. This is used by Canoeboot to provide an
+open BIOS for the Sony Playstation!
+
+More information available on the [PlayStation page](../install/playstation.md).
+
+This is automatically compiled by the main build script, and the resulting
+BIOS image is provided in Canoeboot release archives.
+
 src/pico-serprog
 ---------------------------
 
@@ -1170,6 +1225,12 @@ This function also contains `x_()` which cbmk uses to execute commands
 and ensure that they cause an exit (with non-zero status) from cbmk, if they
 return an error state.
 
+This also includes the `mk()` function, which can be used as shorthand to
+build multiple projects, but it doesn't handle targets within multi-tree projects,
+so if for example you say `mk coreboot`, it would build every coreboot target.
+This is useful for the release build logic, because now it can much more simply
+build all of Canoeboot, while still being flexible about it.
+
 include/rom.sh
 -----------
 
@@ -1238,6 +1299,10 @@ When the ROM is finished compiling, it will appear under a directory in `bin/`
 This script is the beating heart of Canoeboot. Break it, and you break
 Canoeboot!
 
+CCACHE is automatically used, when building coreboot, but not currently for
+other projects. This is done by cooking coreboot configs at build time, enabling
+coreboot's build option for it.
+
 Serprog images:
 --------------