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/*Copyright 2018 Juan Bosco Garcia
*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 3 of the License, 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 Min_SMP. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ACPI_H__
#define __ACPI_H__
#include <include/stdint.h> //uint16_t, uint32_t_t...
#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[1];
uint32_t rsdt_addr;
} __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__));
//APIC table signature
#define ACPI_APIC_SIG "APIC"
//Types value for Local APIC and I/O APIC ACPI's structures
#define ACPI_APIC_ENTRY_LAPIC 0
#define ACPI_APIC_ENTRY_IOAPIC 1
/* 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__));
/* 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 base;
} __attribute__((__packed__));
int acpi_setup();
void acpi_print_info();
/* extra_setup() function:
*
* Must be executed after configure paging
* Reserve Local APIC common pointer in a physical page
*/
int extra_setup();
#endif /* __ACPI_H__ */
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