memmapdump

Revision 3 as of 2013-02-25 14:20:05

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Firmware Test Suite - memmapdump utility

This utility dumps the system memory map. This information is simply derived from /sys/firmware/memmap which in turn has gathered this data at boot time using the Int 0x15 AX=0xe820 on a traditional BIOS or via the memory map protocol boot service on a UEFI system.

Example output is as follows:

Dump system memory map.
--------------------------------------------------------------------------------
Test 1 of 1: Dump system memory map.
Memory Map Layout
-----------------
0x0000000000000000 - 0x000000000009d7ff (System RAM)
0x000000000009d800 - 0x000000000009ffff (reserved)
0x00000000000e0000 - 0x00000000000fffff (reserved)
0x0000000000100000 - 0x000000001fffffff (System RAM)
0x0000000020000000 - 0x00000000201fffff (reserved)
0x0000000020200000 - 0x0000000040003fff (System RAM)
0x0000000040004000 - 0x0000000040004fff (reserved)
0x0000000040005000 - 0x00000000d067ffff (System RAM)
0x00000000d0680000 - 0x00000000dae9efff (reserved)
0x00000000dae9f000 - 0x00000000daf9efff (ACPI Non-volatile Storage)
0x00000000daf9f000 - 0x00000000daffefff (ACPI Non-volatile Storage)
0x00000000dafff000 - 0x00000000df9fffff (reserved)
0x00000000f8000000 - 0x00000000fbffffff (reserved)
0x00000000fec00000 - 0x00000000fec00fff (reserved)
0x00000000fed08000 - 0x00000000fed08fff (reserved)
0x00000000fed10000 - 0x00000000fed19fff (reserved)
0x00000000fed1c000 - 0x00000000fed1ffff (reserved)
0x00000000fee00000 - 0x00000000fee00fff (reserved)
0x00000000ffc00000 - 0x00000000ffffffff (reserved)
0x0000000100000000 - 0x000000019e5fffff (System RAM)
0x000000019e600000 - 0x000000019e7fffff (reserved)

Example:

sudo fwts memmapdump - 

..runs the memmapdump on your machine and dumps the output to stdout.