--- wikisrc/users/jakllsch.mdwn	2009/10/21 01:06:48	1.1
+++ wikisrc/users/jakllsch.mdwn	2010/05/01 20:15:13	1.4
@@ -1,2 +1,61 @@
-## Jonathan Kollasch <jakllsch@NetBSD.org>
-I'm here, maybe I'll even make a [[todo]] list someday.
+# Jonathan Kollasch
+
+## [[!template id=man name="ddb" section="4"]] tips
+
+### locating a softc
+This locates a device's softc using it's `cfdriver_t` (e.g. `&mainbus_cd`, `&cpu_cd`) and its "device unit" (e.g. the `0` in `mainbus0`).
+
+    db{0}> call device_lookup_private(ohci_cd, 0)
+    0xffff800045fb2008
+
+### locating structure members
+This uses [[!template id=man name="gdb" section="1"]] and a kernel with debugging symbols to find the offset to a element in a structure.
+
+    $ gdb netbsd.gdb
+    ...
+    (gdb) print &((struct ohci_softc *)0)->iot
+    $3 = (bus_space_tag_t *) 0x478
+    (gdb) print &((struct ohci_softc *)0)->ioh
+    $4 = (bus_space_handle_t *) 0x480
+
+### peeking at mapped registers
+
+    db{0}> call bus_space_read_4(*(ffff800045fb2008+478), *(ffff800045fb2008+480), 0)
+    0x110
+
+## Unfinished Projects
+
+### x86 UEFI kernel loader
+Building this for x64 UEFI requires the `ms_abi` function attribute introduced in GCC 4.4 or so.
+This project uses Intel UEFI headers and some existing FreeBSD work.
+Needs more work and cleanup, also toolchain updates.
+Work has been done using the OVMF BIOS images for Qemu.
+
+### bcm47xx for evbmips
+Boots multiuser on NFS root, needs more work and cleanup.
+This project is on hold until there's a miniature userland that fits in 4-8MiB flash storage devices, on a flash-oriented file system.
+[[!template id=man name="bce" section="4"]] and [[!template id=man name="bwi" section="4"]] would need refactoring to be bus-independent.
+
+### Conexant PCI DTV driver
+I have some code for 23880-3 and 887 host interfaces.
+This type of hardware is hard to find freely available docs for.
+Tuner/demod drivers from Linux could be ported, but would still be GPLed.
+Probably better to keep these drivers in userland.
+
+Should try to coordinate with what FreeBSD is doing: <http://wiki.freebsd.org/HDTV>.
+
+### Memory-mapped PCI config access on x86
+Needs cleanup, and maybe some more validation of MCFG tables.
+
+### Toshiba ACPI LCD backlight driver
+Loosly based on [[!template id=man name="vald" section="4"]]. Currently attaches to `TOS1900`/`VALZ`, but doesn't interact with this device.
+This driver should really attach to `\_SB.PCI0.GFX0.LCD` or
+`\_SB.PCI0.PEGP.VGA.LCD`, which are the devices that get notified of
+brightness button pushes, and contain the `_BCL`, `_BCM`, and `_BQC`
+methods that access the brightness adjustment function.
+Such an attachment does not appear to be possible (or at the very least, easy)
+at present.
+
+## Possible Projects
+### AMD PowerNow/Cool'n'Quiet states loaded from ACPI tables
+