> +/* for e820map.map[].type */
> +#define E820_RAM 1
> +#define E820_RESERVED 2
> +#define E820_ACPI 3
> +
ACPI knows two memory types: ACPI reclaim memory (3), which should be read
by the OS and can then be freed like normal RAM, and ACPI NVS sleep memory
(4) which contains structures by the BIOS which must be preserved by the
OS during sleeping.
Simon
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