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// MIT License, Copyright (c) 2021 Marvin Borner
// Many huge structures from ACPI spec
#ifndef ACPI_H
#define ACPI_H
#include <def.h>
#define RSDP_MAGIC "RSD PTR "
#define RSDT_MAGIC "RSDT"
#define MADT_MAGIC "APIC"
#define FADT_MAGIC "FACP"
#define HPET_MAGIC "HPET"
/**
* General headers
*/
struct sdt_header {
u8 signature[4];
u32 length;
u8 revision;
u8 checksum;
u8 oem_id[6];
u8 oem_table_id[8];
u32 oem_revision;
u32 creator_id;
u32 creator_revision;
};
struct sdp_header {
u8 signature[8];
u8 checksum;
u8 oem_id[6];
u8 revision;
};
struct generic_address {
u8 address_space;
u8 bit_width;
u8 bit_offset;
u8 access_size;
u32 phys_low;
u32 phys_high;
};
/**
* RSDT
*/
struct rsdt {
struct sdt_header header;
u32 sdt_pointer[];
};
/**
* RSDP - points to RSDT
*/
struct rsdp {
struct sdp_header header;
struct rsdt *rsdt;
};
/**
* MADT
*/
struct madt_entry_header {
u8 type;
u8 length;
};
struct madt {
struct sdt_header header;
u32 local_address;
u32 flags;
struct madt_entry_header entry;
} PACKED;
/**
* FADT
*/
struct fadt {
struct sdt_header header;
u32 firmware_ctrl;
u32 dsdt;
u8 reserved;
u8 preferred_power_mgmt;
u16 sci_interrupt;
u32 smi_command_port;
u8 acpi_enable;
u8 acpi_disable;
u8 s4_bios_req;
u8 pstate_control;
u32 pm1a_event_block;
u32 pm1b_event_block;
u32 pm1a_control_block;
u32 pm1b_control_block;
u32 pm2_control_block;
u32 pm_timer_block;
u32 gpe0_block;
u32 gpe1_block;
u8 pm1_event_length;
u8 pm1_control_length;
u8 pm2_control_length;
u8 pm_timer_length;
u8 gpe0_length;
u8 gpe1_length;
u8 gpe1_base;
u8 c_state_control;
u16 worst_c2_latency;
u16 worst_c3_latency;
u16 flush_size;
u16 flush_stride;
u8 duty_offset;
u8 duty_width;
u8 day_alarm;
u8 month_alarm;
u8 century;
// Used since ACPI 2.0+
u16 boot_architecture_flags;
u8 reserved2;
u32 flags;
struct generic_address reset_reg;
u8 reset_value;
u8 reserved3[3];
// Available on ACPI 2.0+
u32 x_firmware_control_high;
u32 x_firmware_control_low;
u32 x_dsdt_high;
u32 x_dsdt_low;
struct generic_address x_pm1a_event_block;
struct generic_address x_pm1b_event_block;
struct generic_address x_pm1a_control_block;
struct generic_address x_pm1b_control_block;
struct generic_address x_pm2_control_block;
struct generic_address x_pm_timer_block;
struct generic_address x_gpe0_block;
struct generic_address x_gpe1_block;
} PACKED;
/**
* HPET
*/
struct hpet {
struct sdt_header header;
u8 hardware_rev_id;
u8 comparator_count : 5;
u8 counter_size : 1;
u8 reserved : 1;
u8 legacy_replacement : 1;
u16 pci_vendor_id;
struct generic_address address;
u8 hpet_number;
u16 minimum_tick;
u8 page_protection;
} PACKED;
void acpi_probe(void);
#endif
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