svn commit: r306065 - in head/sys vs. PowerMacs: Nathan's trail patch included but inappropriate? [My hack vs. Apple G4's.]

[Mark Millard]

On 2016-Nov-15, at 1:42 PM, Mark Millard <markmi at dsl-only.net> wrote:

> [Top post of an experiment with loading iicsmb.ko from the loader prompt.]
> 
> I stopped a PowerMac G5 "Quad Core" at the loader prompt (not
> using /boot/loader.conf or other such) and did a:
> 
> load iicsmb
> boot
> 
> (smbus.ko also loads --and so for my earlier "in kernel" suggestion
> "device smbus" should also be listed in the KERNCONF file.)
> 
> It booted fine. Afterwards kldstat reported:
> 
> # kldstat
> Id Refs Address            Size		Name
> 1    6 0x100000	16901b0		kernel
> 2    1 0x1792000	  14598		iicsmb.ko
> 3    2 0x17a7000	  13f80		smbus.ko
> 
> Those are not the addresses that were reported at the loader prompt for
> iicsmb and smbus:
> 
> .text for iccsmb was listed as at 0x28e0 if I remember right
> .text for smbus  was listed as at 0x2800 if I remember right
> 
> The .data for each were listed at the loader prompt as each starting in
> the 0x6xxx range as I remember.

One too many x's: 0x6c8 and 0x600 were the figures.

> I'm not sure that what the loader prompt context listed was actually the
> load addresses at that time.
> 
> I do not know if you get similar results or not.
> 
> If the loader prompt loads always work and the loader.conf loads do not
> that might also be interesting evidence about the problem(s) involved.
> 
> I do not know how to tell if iicsmb and smbus are working or not.
> 
> It may be that explicit loads from the loader prompt are another
> workaround.
> 
> 
> I have not yet tried:
> 
> unload
> load iccsmb
> boot

(typo above: iicsmb is what I loaded.)

That did not work: the kernel needs to be loaded first. . .

unload
load kernel
load iicsmb
boot

did work. The kldstat then ends up being:

# kldstat
Id Refs Address		Size		Name
 1    6 0x100000	16901b0		kernel
 2    1 0x1791000	14598		iicsmb.ko
 3    2 0x17a6000	13f80		smbus.ko

(Not much different --but not identical to before for 2 of the Address values.)



===
Mark Millard
markmi at dsl-only.net