ACPI Namespace Reference

Abstracts the ACPI standard that provides interfaces for hardware detection, device configuration, and energy management. More...

Structs
struct	Address
	ACPI address format. More...
struct	MADT
	Multiple APIC Description Table (MADT) More...
struct	RSDP
	Root System Description Pointer (RSDP) More...
struct	RSDT
	Root System Description Table (RSDT) More...
struct	SDTH
	System Description Table Header (SDTH) More...
struct	SubHeader
	Helper structure. More...
struct	XSDT
	Extended System Description Table (XSDT) More...

Enumerations
enum	AddressSpace : uint8_t {   MEMORY = 0x0,   IO = 0x1 }

Functions
bool	init ()
unsigned	count ()
SDTH *	get (unsigned num)
SDTH *	get (char a, char b, char c, char d)
int	revision ()

Constants
const char *	RSDP_SIGNATURE = "RSD PTR "

Detailed Description

Abstracts the ACPI standard that provides interfaces for hardware detection, device configuration, and energy management.

ACPI is the successor to APM (Advanced Power Management), aiming to give the operating system more control over the hardware. This extended control, for instance, enables the operating system to assign a particular amount of energy to every device (e.g., by disabling a device or changing to standby mode). For this purpose, BIOS and chipset provide a set of tables that describe the system and its components and provide routines the OS can call. These tables contain details about the system, such as the number of CPU cores and the LAPIC/IOAPIC, which are determined during system boot.