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Diff for /wikisrc/users/jakllsch.mdwn between versions 1.2 and 1.4

version 1.2, 2009/10/21 23:23:09 version 1.4, 2010/05/01 20:15:13
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 # Jonathan Kollasch  # 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  ## Unfinished Projects
   
 ### x86 UEFI kernel loader  ### x86 UEFI kernel loader
Line 22  Probably better to keep these drivers in Line 45  Probably better to keep these drivers in
 Should try to coordinate with what FreeBSD is doing: <http://wiki.freebsd.org/HDTV>.  Should try to coordinate with what FreeBSD is doing: <http://wiki.freebsd.org/HDTV>.
   
 ### Memory-mapped PCI config access on x86  ### Memory-mapped PCI config access on x86
 Still need to figure out how pcitag_t will work for a 3rd mode that can't be switched on until after ACPI is initialized.  Needs cleanup, and maybe some more validation of MCFG tables.
 Existing code I have assumes that no tags are generated until mmconf is turned on, which is not a reasonable assumption to make.  
   ### 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  ## Possible Projects
 ### AMD PowerNow/Cool'n'Quiet states loaded from ACPI tables  ### AMD PowerNow/Cool'n'Quiet states loaded from ACPI tables
   
Removed from v.1.2  
changed lines
  Added in v.1.4

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