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/* acpi_parse_apic.h - ACPI-MADT table parser. Header file
Copyright (C) 2018 Juan Bosco Garcia
Copyright (C) 2019 2020 Almudena Garcia Jurado-Centurion
Written by Juan Bosco Garcia and Almudena Garcia Jurado-Centurion
This file is part of Min_SMP.
Min_SMP is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Min_SMP is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#ifndef __ACPI_H__
#define __ACPI_H__
#include <stdint.h>
enum ACPI_RETURN {
ACPI_BAD_CHECKSUM = -1,
ACPI_BAD_ALIGN = -2,
ACPI_NO_RSDP = -3,
ACPI_NO_RSDT = -4,
ACPI_BAD_SIGNATURE = -5,
ACPI_NO_APIC = -6,
ACPI_NO_LAPIC = -7,
ACPI_APIC_FAILURE = -8,
ACPI_FIT_FAILURE = -9,
ACPI_SUCCESS = 0,
};
#define ACPI_RSDP_ALIGN 16
#define ACPI_RSDP_SIG "RSD PTR "
struct acpi_rsdp {
uint8_t signature[8];
uint8_t checksum;
uint8_t oem_id[6];
uint8_t revision;
uint32_t rsdt_addr;
} __attribute__((__packed__));
struct acpi_rsdp2 {
struct acpi_rsdp v1;
uint32_t length;
uint64_t xsdt_addr;
uint8_t checksum;
uint8_t reserved[3];
} __attribute__((__packed__));
/*
* RSDT Entry Header
*
* Header which stores the descriptors of tables pointed from RDSP's Entry Field
* Includes the signature of the table, to identify each table.
*
* In MADT, the signature is 'APIC'.
*/
struct acpi_dhdr {
uint8_t signature[4];
uint32_t length;
uint8_t revision;
uint8_t checksum;
uint8_t oem_id[6];
uint8_t oem_table_id[8];
uint32_t oem_revision;
uint8_t creator_id[4];
uint32_t creator_revision;
} __attribute__((__packed__));
#define ACPI_RSDT_SIG "RSDT"
struct acpi_rsdt {
struct acpi_dhdr header;
uint32_t entry[0];
} __attribute__((__packed__));
#define ACPI_XSDT_SIG "XSDT"
struct acpi_xsdt {
struct acpi_dhdr header;
uint64_t entry[0];
} __attribute__((__packed__));
struct acpi_address {
uint8_t is_io;
uint8_t reg_width;
uint8_t reg_offset;
uint8_t reserved;
uint64_t addr64;
} __attribute__((__packed__));
/* APIC table signature. */
#define ACPI_APIC_SIG "APIC"
/* Types value for MADT entries: Local APIC, IOAPIC and IRQ Override. */
enum ACPI_APIC_ENTRY_TYPE {
ACPI_APIC_ENTRY_LAPIC = 0,
ACPI_APIC_ENTRY_IOAPIC = 1,
ACPI_APIC_ENTRY_IRQ_OVERRIDE = 2,
ACPI_APIC_ENTRY_NONMASK_IRQ = 4
};
/*
* APIC descriptor header
* Define the type of the structure (Local APIC, I/O APIC or others).
* Type: Local APIC (0), I/O APIC (1).
*/
struct acpi_apic_dhdr {
uint8_t type;
uint8_t length;
} __attribute__((__packed__));
/*
* Multiple APIC Description Table (MADT)
*
* Describes the APIC structures which exist in the machine.
* Includes the common address where Local APIC is mapped in main memory.
*
* Entry field stores the descriptors of APIC structures.
*/
struct acpi_apic {
struct acpi_dhdr header; /* Header, which stores the descriptor for RDST's Entry field. */
uint32_t lapic_addr; /* Local Interrupt Controller Address. */
uint32_t flags;
struct acpi_apic_dhdr entry[0]; /* Interrupt Controller Structure */
} __attribute__((__packed__));
/*
* Processor Local APIC Structure
*
* Stores information about APIC ID, flags and ACPI Processor UID
*/
struct acpi_apic_lapic {
struct acpi_apic_dhdr header;
uint8_t processor_id; /* ACPI Processor UID */
uint8_t apic_id;
uint32_t flags;
} __attribute__((__packed__));
#define ACPI_LAPIC_FLAG_ENABLED (1 << 0)
#define ACPI_LAPIC_FLAG_CAPABLE (1 << 1)
/*
* I/O APIC Structure
*
* Stores information about APIC ID, and I/O APIC tables
*/
struct acpi_apic_ioapic {
struct acpi_apic_dhdr header;
uint8_t apic_id;
uint8_t reserved;
uint32_t addr;
uint32_t gsi_base;
} __attribute__((__packed__));
/*
* IRQ Override structure
*
* Stores information about IRQ override, with busses and IRQ.
*/
struct acpi_apic_irq_override {
struct acpi_apic_dhdr header;
uint8_t bus;
uint8_t irq;
uint32_t gsi;
uint16_t flags;
} __attribute__((__packed__));
#define ACPI_HPET_SIG "HPET"
/*
* HPET High Precision Event Timer structure
*/
struct acpi_hpet {
struct acpi_dhdr header;
uint32_t id;
struct acpi_address address;
uint8_t sequence;
uint16_t minimum_tick;
uint8_t flags;
} __attribute__((__packed__));
int acpi_apic_init(void);
void acpi_print_info(phys_addr_t rsdp, void *rsdt, int acpi_rsdt_n);
extern unsigned lapic_addr;
#endif /* __ACPI_H__ */
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