Diff for /wikisrc/users/jakllsch.mdwn between versions 1.1 and 1.6

version 1.1, 2009/10/21 01:06:48 version 1.6, 2014/04/12 02:28:11
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 ## Jonathan Kollasch <jakllsch@NetBSD.org>  # Jonathan Kollasch
 I'm here, maybe I'll even make a [[todo]] list someday.  
   ## [[!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
   Needs more work and cleanup.
   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.
   
   ### Memory-mapped PCI config access on x86
   Needs cleanup, and maybe some more validation of MCFG tables.

Removed from v.1.1  
changed lines
  Added in v.1.6


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