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To: krishnaLee <sssky307@163.com>, edk2-devel@lists.01.org
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From: Laszlo Ersek <lersek@redhat.com>
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Subject: Re: question about uefi calling convention
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On 08/14/18 11:09, krishnaLee wrote:
> Hi,
> In uefi 2.6 specification -> 2.3.4 x64 Platforms,
> "Paging mode is enabled and any memory space defined by the UEFI memory map is identity mapped (virtual address equals physical address)" ...
> is that mean if I write C code like " void *pointer=0xabcd",the pointer is virtual address ,is equal to the physical address, and they are the same?

Yes.

> How the virtual address translate from "CR3->Page Base address,Page directory,page table ..." to physical address in "x64 Long mode,64-bit mode"? is there any sample not theory?

The page tables are built in the DXE IPL PEIM, function
CreateIdentityMappingPageTables().

Laszlo