Hello,
I've been digging a bit in X86 bootstart asm code and found possibly wrong
code, as far as I understand:
In u-boot/arch/x86/cpu/start.S, there is piece of code to disable caches:
/* Turn of cache (this might require a 486-class CPU) */
movl %cr0, %eax
orl $(X86_CR0_NW | X86_CR0_CD), %eax
movl %eax, %cr0
wbinvd
, which perfectly makes sense to me. What doesn't really make sense then is:
/* Turn of cache (this might require a 486-class CPU) */
movl %cr0, %eax
orl $(X86_CR0_NW & X86_CR0_CD), %eax - AND HERE???
movl %eax, %cr0
wbinvd
in start16.S of the same directory.
Is is wrong or not?
Thanks a lot,
Ondrej Kupka
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