Advanced configuration and power interface (ACPI) tables. More...

#include <core.h>
#include <libc/string.h>
#include <kernel/debug/log.h>
#include <kernel/mem/acpi.h>
#include <kernel/mem/kmem.h>
#include <kernel/mem/paging.h>
#include <kernel/mem/pmap.h>
#include <kernel/x86/cpu.h>

Data Structures
struct	btable_t
	A structure used to track the state of the temporary page table generated by the boot loader. More...

struct	acpi_rsdp

struct	acpi_rsdt

struct	acpi_xsdt

struct	acpi

Macros
#define	SIGNATURE_RSDP 0x2052545020445352ll

#define	SIGNATURE_MADT 0x43495041

#define	SIGNATURE_BOOT 0x544f4f42

#define	SIGNATURE_FADT 0x50434146

#define	SIGNATURE_HPET 0x54455048

#define	SIGNATURE_MCFG 0x4746434d

#define	SIGNATURE_SRAT 0x54415253

#define	SIGNATURE_SSDT 0x54445353

#define	SIGNATURE_WAET 0x54454157

#define	PAGE_ALIGN_DOWN(a) ((a) & ~(PAGE_SIZE - 1))

#define	PAGE_ALIGN_UP(a) (((a) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))

Functions
static void	read_fadt (const struct acpi_hdr *hdr)

static void	read_madt (const struct acpi_hdr *hdr)

static void	read_mcfg (const struct acpi_hdr *hdr)

static void	read_table (const struct acpi_hdr *hdr)

static bool	is_mapped (btable_t *btable, uint64_t addr)

static uint64_t	alloc_page (btable_t *btable)

static void	create_page (btable_t *btable, uint64_t addr, uint64_t flags)

static void	map_range (btable_t *btable, uint64_t addr, uint64_t size, uint64_t flags)

static void	map_table (btable_t btable, const struct acpi_hdr hdr)

static void	read_xsdt (btable_t *btable)

static void	read_rsdt (btable_t *btable)

static const struct acpi_rsdp *	find_rsdp (uint64_t addr, uint64_t size)

void	acpi_init ()
	Find and parse all available ACPI tables. More...

int	acpi_version ()
	Return the ACPI version number. More...

const struct acpi_fadt *	acpi_fadt ()
	Return a pointer to the ACPI fixed ACPI description table. More...

const struct acpi_madt *	acpi_madt ()
	Return a pointer to the ACPI multiple APIC description table (MADT). More...

static const void *	madt_find (enum acpi_madt_type type, const void *prev)

const struct acpi_madt_local_apic *	acpi_next_local_apic (const struct acpi_madt_local_apic *prev)
	Return a pointer to the next Local APIC structure entry in the MADT table. More...

const struct acpi_madt_io_apic *	acpi_next_io_apic (const struct acpi_madt_io_apic *prev)
	Return a pointer to the next I/O APIC structure entry in the MADT table. More...

const struct acpi_madt_iso *	acpi_next_iso (const struct acpi_madt_iso *prev)
	Return a pointer to the next Interrupt Source Override (ISO) structure entry in the MADT table. More...

const struct acpi_mcfg_addr *	acpi_next_mcfg_addr (const struct acpi_mcfg_addr *prev)
	Return a pointer to the next Mapped Configuration (MCFG) address entry, used for PCIe. More...

Variables
struct acpi_rsdp	PACKSTRUCT

static struct acpi	acpi

Detailed Description

Advanced configuration and power interface (ACPI) tables.

Definition in file acpi.c.

Data Structure Documentation

struct btable_t

A structure used to track the state of the temporary page table generated by the boot loader.

The ACPI code updates it to access the memory stored in ACPI tables.

Definition at line 36 of file acpi.c.

Data Fields
page_t *	root	The top-level (PML4) page table.
page_t *	next_page	The next page to use when allocating.
page_t *	term_page	Just beyond the last available page.

struct acpi_rsdp

Definition at line 43 of file acpi.c.

Data Fields
char	signature[8]	Contains "RSD PTR ".
uint8_t	checksum	Covers up to (and including) ptr_rsdt.
char	oemid[6]	Supplied by the OEM.
uint8_t	revision	0=1.0, 1=2.0, 2=3.0
uint32_t	ptr_rsdt	32-bit pointer to RSDT table
uint32_t	length	RSDT table length, including header.
uint64_t	ptr_xsdt	64-bit pointer to XSDT table
uint8_t	checksum_ex	Covers entire rsdp structure.
uint8_t	reserved[3]

struct acpi_rsdt

Definition at line 58 of file acpi.c.

Data Fields
struct acpi_hdr	hdr
uint32_t	ptr_table[1]	Pointers to other ACPI tables.

struct acpi_xsdt

Definition at line 64 of file acpi.c.

Data Fields
struct acpi_hdr	hdr
uint64_t	ptr_table[1]	Pointers to other ACPI tables.

struct acpi

Definition at line 70 of file acpi.c.

Data Fields
int	version
const struct acpi_rsdp *	rsdp
const struct acpi_rsdt *	rsdt
const struct acpi_xsdt *	xsdt
const struct acpi_fadt *	fadt
const struct acpi_madt *	madt
const struct acpi_mcfg *	mcfg

Macro Definition Documentation

#define SIGNATURE_RSDP 0x2052545020445352ll

Definition at line 19 of file acpi.c.

Referenced by find_rsdp().

#define SIGNATURE_MADT 0x43495041

Definition at line 20 of file acpi.c.

Referenced by read_table().

#define SIGNATURE_BOOT 0x544f4f42

Definition at line 21 of file acpi.c.

#define SIGNATURE_FADT 0x50434146

Definition at line 22 of file acpi.c.

Referenced by read_table().

#define SIGNATURE_HPET 0x54455048

Definition at line 23 of file acpi.c.

#define SIGNATURE_MCFG 0x4746434d

Definition at line 24 of file acpi.c.

Referenced by read_table().

#define SIGNATURE_SRAT 0x54415253

Definition at line 25 of file acpi.c.

#define SIGNATURE_SSDT 0x54445353

Definition at line 26 of file acpi.c.

#define SIGNATURE_WAET 0x54454157

Definition at line 27 of file acpi.c.

#define PAGE_ALIGN_DOWN ( a ) ((a) & ~(PAGE_SIZE - 1))

Definition at line 30 of file acpi.c.

Referenced by acpi_init(), map_range(), and map_table().

#define PAGE_ALIGN_UP ( a ) (((a) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))

Definition at line 31 of file acpi.c.

Referenced by map_range(), and map_table().

Function Documentation

static void read_fadt ( const struct acpi_hdr * hdr )

static

Definition at line 84 of file acpi.c.

Referenced by read_table().

static void read_madt ( const struct acpi_hdr * hdr )

static

Definition at line 91 of file acpi.c.

Referenced by read_table().

static void read_mcfg ( const struct acpi_hdr * hdr )

static

Definition at line 98 of file acpi.c.

Referenced by read_table().

static void read_table ( const struct acpi_hdr * hdr )

static

Definition at line 105 of file acpi.c.

Referenced by read_rsdt(), and read_xsdt().

static bool is_mapped	(	btable_t *	btable,
		uint64_t	addr
	)

static

Definition at line 124 of file acpi.c.

Referenced by map_range().

static uint64_t alloc_page ( btable_t * btable )

static

Definition at line 152 of file acpi.c.

Referenced by create_page().

static void create_page	(	btable_t *	btable,
		uint64_t	addr,
		uint64_t	flags
	)

static

Definition at line 163 of file acpi.c.

Referenced by map_range().

static void map_range	(	btable_t *	btable,
		uint64_t	addr,
		uint64_t	size,
		uint64_t	flags
	)

static

Definition at line 187 of file acpi.c.

Referenced by map_table().

static void map_table	(	btable_t *	btable,
		const struct acpi_hdr *	hdr
	)

static

Definition at line 202 of file acpi.c.

Referenced by acpi_init(), read_rsdt(), and read_xsdt().

static void read_xsdt ( btable_t * btable )

static

Definition at line 223 of file acpi.c.

Referenced by acpi_init().

static void read_rsdt ( btable_t * btable )

static

Definition at line 245 of file acpi.c.

Referenced by acpi_init().

static const struct acpi_rsdp* find_rsdp	(	uint64_t	addr,
		uint64_t	size
	)

static

Definition at line 267 of file acpi.c.

Referenced by acpi_init().

void acpi_init ( )

Find and parse all available ACPI tables.

Definition at line 281 of file acpi.c.

Referenced by kmain().

int acpi_version ( )

Return the ACPI version number.

Returns: The ACPI version number (1 through 5).

Definition at line 352 of file acpi.c.

const struct acpi_fadt* acpi_fadt ( )

Return a pointer to the ACPI fixed ACPI description table.

Returns: A pointer to the non-extended FADT structure.

Definition at line 358 of file acpi.c.

const struct acpi_madt* acpi_madt ( )

Return a pointer to the ACPI multiple APIC description table (MADT).

Returns: A pointer to the MADT structure.

Definition at line 364 of file acpi.c.

Referenced by cmd_display_apic().

static const void* madt_find	(	enum acpi_madt_type	type,
		const void *	prev
	)

static

Definition at line 370 of file acpi.c.

Referenced by acpi_next_io_apic(), acpi_next_iso(), and acpi_next_local_apic().

const struct acpi_madt_local_apic* acpi_next_local_apic ( const struct acpi_madt_local_apic * prev )

Return a pointer to the next Local APIC structure entry in the MADT table.

Parameters

[in] prev Pointer to the local APIC returned by a previous call to this function. Pass NULL for the first call.

Returns: A pointer to a the next local APIC structure, or NULL if none remain.

Definition at line 398 of file acpi.c.

Referenced by cmd_display_apic().

const struct acpi_madt_io_apic* acpi_next_io_apic ( const struct acpi_madt_io_apic * prev )

Return a pointer to the next I/O APIC structure entry in the MADT table.

Parameters

[in] prev Pointer to the I/O APIC returned by a previous call to this function. Pass NULL for the first call.

Returns: A pointer to a the next I/O APIC structure, or NULL if none remain.

Definition at line 405 of file acpi.c.

Referenced by acpi_init(), and cmd_display_apic().

const struct acpi_madt_iso* acpi_next_iso ( const struct acpi_madt_iso * prev )

Return a pointer to the next Interrupt Source Override (ISO) structure entry in the MADT table.

Parameters

[in] prev Pointer to the ISO returned by a previous call to this function. Pass NULL for the first call.

Returns: A pointer to a the next ISO structure, or NULL if none remain.

Definition at line 412 of file acpi.c.

Referenced by cmd_display_apic().

const struct acpi_mcfg_addr* acpi_next_mcfg_addr ( const struct acpi_mcfg_addr * prev )

Return a pointer to the next Mapped Configuration (MCFG) address entry, used for PCIe.

Parameters

[in] prev Pointer to the MCFG entry returned by a previous call to this function. Pass NULL for the first call.

Returns: A pointer to a the next MCFG entry, or NULL if none remain.

Definition at line 419 of file acpi.c.

Referenced by cmd_display_pcie().

Variable Documentation

struct acpi_xsdt PACKSTRUCT

struct acpi acpi

static

Definition at line 81 of file acpi.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Data Structure Documentation

Macro Definition Documentation

Function Documentation

Variable Documentation