head -r333897 (usefdt and old PowerMac) questions

[Nathan Whitehorn]

You need to wait for one more patch. With that, usefdt=1 is confirmed 
working on PowerMac 11,2 (like the quad core). You must use vt, not sc, 
but everything should work out of the box once that patch is in. The 
only caveat is that bge0 and bge1 may swap numbers.
-Nathan

On 05/19/18 21:09, Mark Millard wrote:
> Long ago you had me try usefdt=1 on an old PowerMac G5 so-called
> "Quad Core" and it failed to boot.
>
> Does -r333897 mean that I should retest if I get a chance?
>
> Also, the code path:
>
> head/sys/dev/vt/hw/ofwfb/ofwfb.c
>
> suggests to me a vt specific change, not spanning
> sc. If I test, do I need to be specific about which
> context I test?
>
> I build with PS3 disabled and sc included. (You
> suggested such long ago when vt was having a problem
> and it was expected sc would work --which it did.
> I've continued to have vt and sc around since then.)
>
>
> # more /usr/src/sys/powerpc/conf/GENERIC64vtsc-NODBG
> #
> # GENERIC -- Custom configuration for the powerpc/powerpc64
> #
>
> include "GENERIC64"
>
> ident   GENERIC64vtsc-NODBG
>
> makeoptions     DEBUG=-g                # Build kernel with gdb(1) debug symbols
>
> nooptions       PS3                     # Sony Playstation 3               HACK!!! to allow sc
>
> options         KDB                     # Enable kernel debugger support
>
> options         ALT_BREAK_TO_DEBUGGER
> options         BREAK_TO_DEBUGGER
>
> # For minimum debugger support (stable branch) use:
> options         KDB_TRACE               # Print a stack trace for a panic
> options         DDB                     # Enable the kernel debugger
> options         GDB                     # HACK!!! ...
>
> # Extra stuff:
> #options        VERBOSE_SYSINIT         # Enable verbose sysinit messages
> #options        BOOTVERBOSE=1
> #options        BOOTHOWTO=RB_VERBOSE
> #options        KTR
> #options        KTR_MASK=KTR_TRAP
> ##options       KTR_CPUMASK=0xF
> #options        KTR_VERBOSE
>
> # HACK!!! to allow sc for 2560x1440 display on Radeon X1950 that vt historically mishandled during booting
> device          sc
> #device                 kbdmux          # HACK: already listed by vt
> options         SC_OFWFB        # OFW frame buffer
> options         SC_DFLT_FONT    # compile font in
> makeoptions     SC_DFLT_FONT=cp437
>
>
> # Disable any extra checking for. . .
> nooptions       DEADLKRES               # Enable the deadlock resolver
> nooptions       INVARIANTS              # Enable calls of extra sanity checking
> nooptions       INVARIANT_SUPPORT       # Extra sanity checks of internal structures, required by INVARIANTS
> nooptions       WITNESS                 # Enable checks to detect deadlocks and cycles
> nooptions       WITNESS_SKIPSPIN        # Don't run witness on spinlocks for speed
> nooptions       DIAGNOSTIC
> nooptions       MALLOC_DEBUG_MAXZONES   # Separate malloc(9) zones
>
> device          filemon
> device          geom_label
>
> ===
> Mark Millard
> marklmi at yahoo.com
> ( dsl-only.net went
> away in early 2018-Mar)
>
>