1 files changed, 168 insertions, 0 deletions
diff --git a/src/loader/inc/acpi.h b/src/loader/inc/acpi.h
new file mode 100644
index 0000000..f7626e9
--- /dev/null
+++ b/src/loader/inc/acpi.h
@@ -0,0 +1,168 @@
+// 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_high;
+	u32 phys_low;
+};
+
+/**
+ * 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