Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:		/sys/firmware/efi/runtime-map/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:		December 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) Contact:	Dave Young <dyoung@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Description:	Switching efi runtime services to virtual mode requires
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 		that all efi memory ranges which have the runtime attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 		bit set to be mapped to virtual addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 		The efi runtime services can only be switched to virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 		mode once without rebooting. The kexec kernel must maintain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 		the same physical to virtual address mappings as the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 		kernel. The mappings are exported to sysfs so userspace tools
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 		can reassemble them and pass them into the kexec kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		/sys/firmware/efi/runtime-map/ is the directory the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		exports that information in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		subdirectories are named with the number of the memory range::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 			/sys/firmware/efi/runtime-map/0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 			/sys/firmware/efi/runtime-map/1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 			/sys/firmware/efi/runtime-map/2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 			/sys/firmware/efi/runtime-map/3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 			...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		Each subdirectory contains five files:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		=========   =========================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		attribute   The attributes of the memory range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		num_pages   The size of the memory range in pages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		phys_addr   The physical address of the memory range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		type        The type of the memory range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		virt_addr   The virtual address of the memory range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		=========   =========================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		Above values are all hexadecimal numbers with the '0x' prefix.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) Users:		Kexec