diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-firmware-memmap')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-memmap | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-memmap b/Documentation/ABI/testing/sysfs-firmware-memmap index eca0d65087dc..9205122fa4b1 100644 --- a/Documentation/ABI/testing/sysfs-firmware-memmap +++ b/Documentation/ABI/testing/sysfs-firmware-memmap @@ -20,7 +20,7 @@ Description: the raw memory map to userspace. The structure is as follows: Under /sys/firmware/memmap there - are subdirectories with the number of the entry as their name: + are subdirectories with the number of the entry as their name:: /sys/firmware/memmap/0 /sys/firmware/memmap/1 @@ -34,14 +34,16 @@ Description: Each directory contains three files: - start : The start address (as hexadecimal number with the + ======== ===================================================== + start The start address (as hexadecimal number with the '0x' prefix). - end : The end address, inclusive (regardless whether the + end The end address, inclusive (regardless whether the firmware provides inclusive or exclusive ranges). - type : Type of the entry as string. See below for a list of + type Type of the entry as string. See below for a list of valid types. + ======== ===================================================== - So, for example: + So, for example:: /sys/firmware/memmap/0/start /sys/firmware/memmap/0/end @@ -54,12 +56,15 @@ Description: - System RAM - ACPI Tables - ACPI Non-volatile Storage + - Unusable memory + - Persistent Memory (legacy) + - Persistent Memory + - Soft Reserved - reserved Following shell snippet can be used to display that memory - map in a human-readable format: + map in a human-readable format:: - -------------------- 8< ---------------------------------------- #!/bin/bash cd /sys/firmware/memmap for dir in * ; do @@ -68,4 +73,3 @@ Description: type=$(cat $dir/type) printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type" done - -------------------- >8 ---------------------------------------- |