[coreboot] r1137 - in coreboot-v3/arch/x86: . intel/core2

ron minnich rminnich at gmail.com
Sat Feb 21 21:31:09 CET 2009

In v2, the esp was loaded from a global variable defined in another
module. We're running in CAR, no global variables, so what I do is
copy the secondary_start to low 1M, as before, but put the
stackpointer right before the start of the code.

>       /* Set the stack pointer */
> -     movl    _secondary_start, %esp
> +     movl    $_secondary_start-4,%eax
> +     movl    0x0(%eax),%esp

So the C code running on the BSP will put the stack pointer value
right before the code. This (ought to) work -- secondary start is in
ram at (for now) 0x5000.

I've verified that we're at least starting core1, but something else
is going wrong. Not yet sure what.

Also I guess it's time to make printk smp-safe.


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