On Mon, Apr 18, 2011 at 04:57:43PM +0100, mark@xxxxxxxxxxxxxxxxxx wrote:
> Hi Sam,
>
> Thee things that may help.
>
> 1) Change head.S to remap 8M. Last time I did anything on
> sun4c, it only remapped 3M and minimum kernel size i
> ended up working with was > 3M.
This looked rather promising - but same result.
I only changed this:
--- a/arch/sparc/kernel/head_32.S
+++ b/arch/sparc/kernel/head_32.S
@@ -716,7 +716,7 @@ sun4_normal_loop:
sun4c_remap:
mov 0, %g3 ! source base
set KERNBASE, %g4 ! destination base
- set 0x300000, %g5 ! upper bound 3MB
+ set 0x800000, %g5 ! upper bound 8MB
mov 1, %l6
sll %l6, 18, %l6 ! sun4c mmu segmap size
I think we get stuck somewhere before this - or durign the very
early phases. I tried to read out call-chain with prom debugger.
But that failed.
My attempts to set proper breakpoints also failed - maybe I
mixed up some addresses.
I have left it for now as I need to get forward with other stuff.
> 2) Add in code to disable the Lance before setting up
> the device tree. If you don't do this then it may generate
> interrupts before you have a handler installed.
> DaveM had a patch for this somewhere (> 2 years ago).
Digged a little. Found a patch that dacem created in response
to a thread you were invloved in.
commit 76fcdb30ae1cb28e438e5ffd4db5f49ea3d96cd7
Author: David S. Miller <davem@xxxxxxxxxxxxxxxxxxxx>
Date: Mon Jul 30 18:23:39 2007 -0700
[SUNLANCE]: Fix sparc32 crashes by using of_*() interfaces.
This driver was still using the deprecated prom_*() interfaces to
obtain values out of the OBP device tree, and this is causing
some kinds of problems on sparc32 especially SMP boxes.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
So I think it is fixed in-tree. And I anyway does not get that far.
> 3) I had problems with my SparcStation clone. It has a CG3
> and the default driver set up results in a black on black
> screen. This is fine when using serial console but a pain
> if you forget to unplug the keyboard before booting.
Good to know.
Thanks for your reply!
Sam
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