Memory after UEFI ExitBootServices

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teodori
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Memory after UEFI ExitBootServices

Post by teodori »

Hello, UEFI uses a flat memory model where virtual equals physical memory. During normal UEFI application processing I use AllocatePage() and FreePage(), but at a certain time I call GetMemoryMap() and ExitBootServices(). Can I at that time 'movl %cr3, %eax' and than work with the page tables?
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Icee
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Location: Moscow, Russia

Re: Memory after UEFI ExitBootServices

Post by Icee »

Yes, but if you want to use UEFI runtime services then before you change the mapping you'll need to call SetVirtualAddressMap() with your custom map.
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