Parse ACPI MADT table

kernel/platform/i386_pc/acpi/acpi.h

@@ -0,0 +1,173 @@
+#ifndef _ACPI_ACPI_H
+#define _ACPI_ACPI_H
+
+#include <libk/types.h>
+#include <libk/compiler.h>
+
+struct acpi_header {
+  byte_t signature[4];
+  uint32_t length;
+  uint8_t revision;
+  uint8_t checksum;
+  byte_t oem[6];
+  byte_t oemtable[8];
+  uint32_t oem_revision;
+  uint32_t creator;
+  uint32_t creator_revision;
+} packed;
+
+struct acpi_rsdp {
+  byte_t signature[8];
+  uint8_t checksum;
+  byte_t oem[6];
+  uint8_t revision;
+  uint32_t rsdt_addr;
+} packed;
+
+struct acpi_rsdt {
+  struct acpi_header h;
+  uint32_t ptrs[];
+};
+
+/* Address space */
+enum {
+  ACPI_GAS_SYSMEMORY    = 0,
+  ACPI_GAS_SYSIO        = 1,
+  ACPI_GAS_PCI_CONFIG   = 2,
+  ACPI_GAS_MBED_CTL     = 3,
+  ACPI_GAS_SYSMGMT_BUS  = 4,
+  ACPI_GAS_CMOS         = 5,
+  ACPI_GAS_PCI_BAR_TGT  = 6,
+  ACPI_GAS_IPMI         = 7,
+  ACPI_GAS_GPIO         = 8,
+  ACPI_GAS_SERIAL_BUS   = 9,
+  ACPI_GAS_PLAT_COM_CHL = 10,
+};
+
+/* Access size */
+enum {
+  ACPI_GAS_UNDEFINED  = 0,
+  ACPI_GAS_BYTE       = 1,
+  ACPI_GAS_WORD       = 2,
+  ACPI_GAS_DWORD      = 3,
+  ACPI_GAS_QWORD      = 4,
+};
+
+struct acpi_gas {
+  uint8_t addr_space;
+  uint8_t bit_width;
+  uint8_t bit_offset;
+  uint8_t access_size;
+  uint64_t addr;
+} packed;
+
+struct acpi_fadt {
+  struct acpi_header h;
+
+  uint32_t firmware_ctl;
+  uint32_t dsdt;
+
+  uint8_t reserved;
+
+  uint8_t preferred_power_mgmt_profile;
+  uint16_t sci_interrupt;
+  uint32_t smi_cmd_port;
+  uint8_t acpi_enable;
+  uint8_t acpi_disable;
+  uint8_t s4bios_req;
+  uint8_t pstate_ctl;
+  uint32_t pm1a_evt_blk;
+  uint32_t pm1b_evt_blk;
+  uint32_t pm1a_ctl_blk;
+  uint32_t pm1b_ctl_blk;
+  uint32_t pm2_ctl_blk;
+  uint32_t pm_timer_blk;
+  uint32_t gpe0_blk;
+  uint32_t gpe1_blk;
+  uint8_t pm1_evt_length;
+  uint8_t pm1_ctl_length;
+  uint8_t pm2_ctl_length;
+  uint8_t pm_timer_length;
+  uint8_t gpe0_length;
+  uint8_t gpe1_length;
+  uint8_t gpe1_base;
+  uint8_t cstate_ctl;
+  uint16_t worst_c2_latency;
+  uint16_t worst_c3_latency;
+  uint16_t flush_size;
+  uint16_t flush_stride;
+  uint8_t duty_offset;
+  uint8_t duty_width;
+  uint8_t day_alarm;
+  uint8_t month_alarm;
+  uint8_t century;
+
+  uint16_t boot_arch_flags;
+
+  uint8_t reserved2;
+  uint32_t flags;
+
+  struct acpi_gas reset_reg;
+
+  uint8_t reset_value;
+  uint8_t reserved3[3];
+
+  uint64_t x_firmware_ctl;
+  uint64_t x_dsdt;
+
+  struct acpi_gas x_pm1a_evt_blk;
+  struct acpi_gas x_pm1b_evt_blk;
+  struct acpi_gas x_pm1a_ctl_blk;
+  struct acpi_gas x_pm1b_ctl_blk;
+  struct acpi_gas x_pm2_ctl_blk;
+  struct acpi_gas x_pm_timer_blk;
+  struct acpi_gas x_gpe0_blk;
+  struct acpi_gas x_gpe1_blk;
+} packed;
+
+struct acpi_madt {
+  struct acpi_header h;
+
+  uint32_t lapic_addr;
+  uint32_t flags;
+} packed;
+
+enum {
+  ACPI_LAPIC          = 0,
+  ACPI_IOAPIC         = 1,
+  ACPI_INTR_OVERRIDE  = 2,
+};
+
+struct acpi_apic_header {
+  uint8_t type;
+  uint8_t length;
+} packed;
+
+struct acpi_lapic {
+  struct acpi_apic_header h;
+  uint8_t acpi_cpu_id;
+  uint8_t apic_id;
+  uint32_t flags;
+} packed;
+
+struct acpi_ioapic {
+  struct acpi_apic_header h;
+  uint8_t ioapic_id;
+  uint8_t reserved;
+  uint32_t ioapic_addr;
+  uint32_t global_intr_base;
+};
+
+struct acpi_intr_override {
+  struct acpi_apic_header h;
+  uint8_t bus;
+  uint8_t source;
+  uint32_t interrupt;
+  uint16_t flags;
+};
+
+#define ACPI_MAP_START 0xC5000000
+
+void acpi_init(void);
+
+#endif // _ACPI_ACPI_H