Memmap shows the available memory 0000000080A00000-000000009A6BBFFF that should 
be enough to load linux. 

 Why EFI Linux Loader allocate memory resource from start address 80800000? 
Could it allocate the memory resource from the available memory region? 

-----Original Message-----
From: varadgau...@gmail.com [mailto:varadgau...@gmail.com] 
Sent: Sunday, January 04, 2015 8:41 PM
To: 'edk2-de...@lists.sourceforge.net'; linaro-dev@lists.linaro.org; linaro-uefi
Subject: [edk2] kernel memory allocation issue with uefi

I get the following error while loading the LEG-UEFI kernel [1] on a BeagleBone 
Black (omap2plus_defconfig + efi stub support) when the kernel requests memory 
from UEFI.:

Shell> zImage
EFI stub: Booting Linux Kernel...
ConvertPages: failed to find range 80800000 - 81FFFFFF EFI stub: ERROR: Unable 
to allocate memory for uncompressed kernel.
EFI stub: ERROR: Failed to relocate kernel
Error: Image at 0009A3F8000 start failed: Load Error Unloading driver at 
0x0009A3F8000 Error reported: Load Error

`memmap` shows the map to have a gap from 80800000 - 81FFFFFF (PcdFdBaseAddress 
for BBB UEFI is 0x80800000, so that's where I have UEFI loaded).

Does this mean I should adjust the BBB memory map so that all external 
allocations are done *after* the UEFI region (possibly by reserving the lower 
addresses)? Is there an alternate way of getting the kernel up?

Shell> memmap
Type      Start            End              #pages             Attributes
LoaderData 0000000080000000-00000000807FFFFF 0000000000000800 000000000000000F 
Available 0000000080A00000-000000009A6BBFFF 0000000000019CBC 000000000000000F 
LoaderCode 000000009A6BC000-000000009A779FFF 00000000000000BE 000000000000000F 
Reserved  000000009A77A000-000000009A77DFFF 0000000000000004 000000000000000F
RT_Code   000000009A77E000-000000009A78AFFF 000000000000000D 800000000000000F
Available 000000009A78B000-000000009EE54FFF 00000000000046CA 000000000000000F
BS_Data   000000009EE55000-000000009EE79FFF 0000000000000025 000000000000000F
Available 000000009EE7A000-000000009EE9EFFF 0000000000000025 000000000000000F
BS_Data   000000009EE9F000-000000009EEABFFF 000000000000000D 000000000000000F
Available 000000009EEAC000-000000009EEB2FFF 0000000000000007 000000000000000F
BS_Data   000000009EEB3000-000000009F400FFF 000000000000054E 000000000000000F
Available 000000009F401000-000000009F401FFF 0000000000000001 000000000000000F
BS_Data   000000009F402000-000000009F5BEFFF 00000000000001BD 000000000000000F
Available 000000009F5BF000-000000009F646FFF 0000000000000088 000000000000000F
BS_Code   000000009F647000-000000009F74EFFF 0000000000000108 000000000000000F
RT_Code   000000009F74F000-000000009F762FFF 0000000000000014 800000000000000F
RT_Data   000000009F763000-000000009F794FFF 0000000000000032 800000000000000F
BS_Data   000000009F795000-000000009F795FFF 0000000000000001 000000000000000F
RT_Data   000000009F796000-000000009F796FFF 0000000000000001 800000000000000F
BS_Data   000000009F797000-000000009F7ACFFF 0000000000000016 000000000000000F
RT_Data   000000009F7AD000-000000009F7ADFFF 0000000000000001 800000000000000F
BS_Data   000000009F7AE000-000000009FFFFFFF 0000000000000852 000000000000000F
  Reserved  :          4 Pages (16,384)
  LoaderCode:        190 Pages (778,240)
  LoaderData:      2,048 Pages (8,388,608)
  BS_Code   :        264 Pages (1,081,344)
  BS_Data   :      4,006 Pages (16,408,576)
  RT_Code   :         33 Pages (135,168)
  RT_Data   :         52 Pages (212,992)
  ACPI Recl :          0 Pages (0)
  ACPI NVS  :          0 Pages (0)
  MMIO      :          0 Pages (0)
  Available :    123,963 Pages (507,752,448)
Total Memory: 510 MB (534,773,760 Bytes)


[1]
https://git.linaro.org/people/leif.lindholm/linux.git/shortlog/refs/heads/topic-leg-uefi

Thanks,
Varad

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