[coreboot] Data in memory changes unexpectedly ininitialize_cpus

[Zheng Bao]

> Date: Fri, 12 Feb 2010 16:54:43 -0700
> From: marcj303 at gmail.com
> To: Zheng.Bao at amd.com
> CC: coreboot at coreboot.org
> Subject: Re: [coreboot] Data in memory changes unexpectedly ininitialize_cpus
> 
> On Fri, Feb 12, 2010 at 4:48 PM, Marc Jones <marcj303 at gmail.com> wrote:
> > On Thu, Feb 11, 2010 at 6:54 PM, Bao, Zheng <Zheng.Bao at amd.com> wrote:
> >> I kept on finding the problem. Now it is narrowed down to the line 108,
> >> src/arch/i386/coreboot_ram.ld. It is very, very, very, very confused.
> >> My CONFIG_RAMBASE should be 0x200000, which is more than 0x100000, but
> >> the location counter "." is CONFIG_STACK_SIZE. Even if I manually set
> >> ". = CONFIG_STACK_SIZE * 2 ;", I can not get the correct size. But if I
> >> set
> >> ". = 0x2000 * 2 ;", or ". = CONFIG_STACK_SIZE << 1", it is right. I
> >> kinda doubt the compiler and linker.
> >>
> >> Can you try it on your building machine? Just try the
> >> Serengeti_cheetah_fam10 and don't need the hardware. Just check the
> >> build/coreboot_ram.map to see if the _estack - _stack is multiple of
> >> CONFIG_STACK_SIZE. That problem should happen on all the fam10 board if
> >> it is built on my building machine.
> >
> > Is this due to the hard coded values in lapic_cpu_init. I don't really
> > understand the comment or what it is doing. I would expect the AP
> > stacks to be setup based on estack as well.
> >
> > // for all APs, let use stack after pgtbl, 20480 is the pgtbl size for every cpu
> > stack_end = 0x100000+(20480 + CONFIG_STACK_SIZE)*CONFIG_MAX_CPUS -
> > (CONFIG_STACK_SIZE*index);
> >
> 
> This is what I get in my map file. It seems reasonable.
> 
> 00230000 A _stack
> 00238000 A _estack
> 00238000 A _heap
> 002f8000 A _eheap
> 002f8000 A _eram_seg
> 01000000 A CONFIG_RAMTOP
> 
what is the CONFIG_STACK_SIZE in your map file?

> 
> 
> 
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