>On Sun, 14 Nov 1999, Ingles, Raymond wrote:
>> info->mem_base = ioremap(info->reg_base,
>> JS_PCI_VORTEX_MEM_SIZE);
>> regval = readl(info->mem_base +
>> JS_PCI_VORTEX2_LEGACY_CR);
>> joy-pci: reg_base 1: de000000
>> joy-pci: using reg_base of de000000
>> joy-pci: ioremapped, mem_base is c806b000
>> Unable to handle kernel paging request at virtual address c8113030
>it looks like as if JS_PCI_VORTEX2_LEGACY_CR is overflowing above the
>mapped area. Is JS_PCI_VORTEX_MEM_SIZE big enough, and is
>JS_PCI_VORTEX2_LEGACY_CR correct?
You know, that's actually weird. MEM_SIZE is 0x40000 (262144 bytes),
and LEGACY_CR is 0x2a00c. So that shouldn't be a problem. But where on
earth is it getting that address? I mean, unless I messed up my math,
0xc806b000 + 0x2a00c = 0xc809500c, not 0xc8113030! That would be, uh,
a 0xb8030 offset, which, would be past 0x40000. I swear the code I
posted is what I ran, honest. Where's the address coming from?
I'm going to go add some more printk's, and see if hexadecimal math
is distorted in my region of space or what. I really don't think I'm
stomping on my own data anywhere, and I can't see *how* I could just in
that short stretch of code. :-/
Sincerely,
Ray Ingles (248) 377-7735 ray.ingles@fanucrobotics.com
"One of the main reasons for the downfall of the Roman Empire was that,
lacking zero, they had no way to indicate successful termination of
their C programs." - Robert Firth
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