minix/kernel/arch/i386/vm.h

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.define _load_kernel_cr3
.define _last_cr3
#define LOADKERNELCR3 ;\
inc (_cr3switch) ;\
mov eax, (_kernel_cr3) ;\
cmp (_last_cr3), eax ;\
jz 9f ;\
push _load_kernel_cr3 ;\
call _level0 ;\
pop eax ;\
mov eax, (_kernel_cr3) ;\
mov (_last_cr3), eax ;\
inc (_cr3reload) ;\
9:
#define LOADCR3WITHEAX(type, newcr3) ;\
sseg inc (_cr3switch) ;\
sseg mov eax, newcr3 ;\
sseg cmp (_last_cr3), eax ;\
jz 8f ;\
mov cr3, eax ;\
sseg inc (_cr3reload) ;\
sseg mov (_last_cr3), eax ;\
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