1867bcb63SSaket Sinha /* 2867bcb63SSaket Sinha * Based on acpi.c from coreboot 3867bcb63SSaket Sinha * 4867bcb63SSaket Sinha * Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com> 5728c4afcSBin Meng * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com> 6867bcb63SSaket Sinha * 7867bcb63SSaket Sinha * SPDX-License-Identifier: GPL-2.0+ 8867bcb63SSaket Sinha */ 9867bcb63SSaket Sinha 108a8c0352SBin Meng #define RSDP_SIG "RSD PTR " /* RSDP pointer signature */ 118a8c0352SBin Meng #define OEM_ID "U-BOOT" /* U-Boot */ 128a8c0352SBin Meng #define OEM_TABLE_ID "U-BOOTBL" /* U-Boot Table */ 138a8c0352SBin Meng #define ASLC_ID "INTL" /* Intel ASL Compiler */ 14867bcb63SSaket Sinha 15867bcb63SSaket Sinha #define ACPI_RSDP_REV_ACPI_1_0 0 16867bcb63SSaket Sinha #define ACPI_RSDP_REV_ACPI_2_0 2 17867bcb63SSaket Sinha 18867bcb63SSaket Sinha /* 19867bcb63SSaket Sinha * RSDP (Root System Description Pointer) 20867bcb63SSaket Sinha * Note: ACPI 1.0 didn't have length, xsdt_address, and ext_checksum 21867bcb63SSaket Sinha */ 22867bcb63SSaket Sinha struct acpi_rsdp { 23867bcb63SSaket Sinha char signature[8]; /* RSDP signature */ 24867bcb63SSaket Sinha u8 checksum; /* Checksum of the first 20 bytes */ 25867bcb63SSaket Sinha char oem_id[6]; /* OEM ID */ 26728c4afcSBin Meng u8 revision; /* 0 for ACPI 1.0, others 2 */ 27867bcb63SSaket Sinha u32 rsdt_address; /* Physical address of RSDT (32 bits) */ 28867bcb63SSaket Sinha u32 length; /* Total RSDP length (incl. extended part) */ 29867bcb63SSaket Sinha u64 xsdt_address; /* Physical address of XSDT (64 bits) */ 30867bcb63SSaket Sinha u8 ext_checksum; /* Checksum of the whole table */ 31867bcb63SSaket Sinha u8 reserved[3]; 32867bcb63SSaket Sinha }; 33867bcb63SSaket Sinha 34867bcb63SSaket Sinha /* Generic ACPI header, provided by (almost) all tables */ 358a8c0352SBin Meng struct acpi_table_header { 36867bcb63SSaket Sinha char signature[4]; /* ACPI signature (4 ASCII characters) */ 37867bcb63SSaket Sinha u32 length; /* Table length in bytes (incl. header) */ 38867bcb63SSaket Sinha u8 revision; /* Table version (not ACPI version!) */ 39867bcb63SSaket Sinha volatile u8 checksum; /* To make sum of entire table == 0 */ 40867bcb63SSaket Sinha char oem_id[6]; /* OEM identification */ 41867bcb63SSaket Sinha char oem_table_id[8]; /* OEM table identification */ 42867bcb63SSaket Sinha u32 oem_revision; /* OEM revision number */ 438a8c0352SBin Meng char aslc_id[4]; /* ASL compiler vendor ID */ 448a8c0352SBin Meng u32 aslc_revision; /* ASL compiler revision number */ 458a8c0352SBin Meng }; 46867bcb63SSaket Sinha 47867bcb63SSaket Sinha /* A maximum number of 32 ACPI tables ought to be enough for now */ 48867bcb63SSaket Sinha #define MAX_ACPI_TABLES 32 49867bcb63SSaket Sinha 50867bcb63SSaket Sinha /* RSDT (Root System Description Table) */ 51867bcb63SSaket Sinha struct acpi_rsdt { 52867bcb63SSaket Sinha struct acpi_table_header header; 53867bcb63SSaket Sinha u32 entry[MAX_ACPI_TABLES]; 54867bcb63SSaket Sinha }; 55867bcb63SSaket Sinha 56867bcb63SSaket Sinha /* XSDT (Extended System Description Table) */ 57867bcb63SSaket Sinha struct acpi_xsdt { 58867bcb63SSaket Sinha struct acpi_table_header header; 59867bcb63SSaket Sinha u64 entry[MAX_ACPI_TABLES]; 60867bcb63SSaket Sinha }; 61867bcb63SSaket Sinha 62728c4afcSBin Meng /* FADT Preferred Power Management Profile */ 63728c4afcSBin Meng enum acpi_pm_profile { 64728c4afcSBin Meng ACPI_PM_UNSPECIFIED = 0, 65728c4afcSBin Meng ACPI_PM_DESKTOP, 66728c4afcSBin Meng ACPI_PM_MOBILE, 67728c4afcSBin Meng ACPI_PM_WORKSTATION, 68728c4afcSBin Meng ACPI_PM_ENTERPRISE_SERVER, 69728c4afcSBin Meng ACPI_PM_SOHO_SERVER, 70728c4afcSBin Meng ACPI_PM_APPLIANCE_PC, 71728c4afcSBin Meng ACPI_PM_PERFORMANCE_SERVER, 72728c4afcSBin Meng ACPI_PM_TABLET 73867bcb63SSaket Sinha }; 74867bcb63SSaket Sinha 75728c4afcSBin Meng /* FADT flags for p_lvl2_lat and p_lvl3_lat */ 76728c4afcSBin Meng #define ACPI_FADT_C2_NOT_SUPPORTED 101 77728c4afcSBin Meng #define ACPI_FADT_C3_NOT_SUPPORTED 1001 78728c4afcSBin Meng 79728c4afcSBin Meng /* FADT Boot Architecture Flags */ 80728c4afcSBin Meng #define ACPI_FADT_LEGACY_FREE 0x00 81728c4afcSBin Meng #define ACPI_FADT_LEGACY_DEVICES (1 << 0) 82728c4afcSBin Meng #define ACPI_FADT_8042 (1 << 1) 83728c4afcSBin Meng #define ACPI_FADT_VGA_NOT_PRESENT (1 << 2) 84728c4afcSBin Meng #define ACPI_FADT_MSI_NOT_SUPPORTED (1 << 3) 85728c4afcSBin Meng #define ACPI_FADT_NO_PCIE_ASPM_CONTROL (1 << 4) 86728c4afcSBin Meng 87728c4afcSBin Meng /* FADT Feature Flags */ 88728c4afcSBin Meng #define ACPI_FADT_WBINVD (1 << 0) 89728c4afcSBin Meng #define ACPI_FADT_WBINVD_FLUSH (1 << 1) 90728c4afcSBin Meng #define ACPI_FADT_C1_SUPPORTED (1 << 2) 91728c4afcSBin Meng #define ACPI_FADT_C2_MP_SUPPORTED (1 << 3) 92728c4afcSBin Meng #define ACPI_FADT_POWER_BUTTON (1 << 4) 93728c4afcSBin Meng #define ACPI_FADT_SLEEP_BUTTON (1 << 5) 94728c4afcSBin Meng #define ACPI_FADT_FIXED_RTC (1 << 6) 95728c4afcSBin Meng #define ACPI_FADT_S4_RTC_WAKE (1 << 7) 96728c4afcSBin Meng #define ACPI_FADT_32BIT_TIMER (1 << 8) 97728c4afcSBin Meng #define ACPI_FADT_DOCKING_SUPPORTED (1 << 9) 98728c4afcSBin Meng #define ACPI_FADT_RESET_REGISTER (1 << 10) 99728c4afcSBin Meng #define ACPI_FADT_SEALED_CASE (1 << 11) 100728c4afcSBin Meng #define ACPI_FADT_HEADLESS (1 << 12) 101728c4afcSBin Meng #define ACPI_FADT_SLEEP_TYPE (1 << 13) 102728c4afcSBin Meng #define ACPI_FADT_PCI_EXPRESS_WAKE (1 << 14) 103728c4afcSBin Meng #define ACPI_FADT_PLATFORM_CLOCK (1 << 15) 104728c4afcSBin Meng #define ACPI_FADT_S4_RTC_VALID (1 << 16) 105728c4afcSBin Meng #define ACPI_FADT_REMOTE_POWER_ON (1 << 17) 106728c4afcSBin Meng #define ACPI_FADT_APIC_CLUSTER (1 << 18) 107728c4afcSBin Meng #define ACPI_FADT_APIC_PHYSICAL (1 << 19) 108728c4afcSBin Meng #define ACPI_FADT_HW_REDUCED_ACPI (1 << 20) 109728c4afcSBin Meng #define ACPI_FADT_LOW_PWR_IDLE_S0 (1 << 21) 110728c4afcSBin Meng 111728c4afcSBin Meng enum acpi_address_space_type { 112728c4afcSBin Meng ACPI_ADDRESS_SPACE_MEMORY = 0, /* System memory */ 113728c4afcSBin Meng ACPI_ADDRESS_SPACE_IO, /* System I/O */ 114728c4afcSBin Meng ACPI_ADDRESS_SPACE_PCI, /* PCI config space */ 115728c4afcSBin Meng ACPI_ADDRESS_SPACE_EC, /* Embedded controller */ 116728c4afcSBin Meng ACPI_ADDRESS_SPACE_SMBUS, /* SMBus */ 117728c4afcSBin Meng ACPI_ADDRESS_SPACE_PCC = 0x0a, /* Platform Comm. Channel */ 118728c4afcSBin Meng ACPI_ADDRESS_SPACE_FIXED = 0x7f /* Functional fixed hardware */ 119867bcb63SSaket Sinha }; 120867bcb63SSaket Sinha 121728c4afcSBin Meng enum acpi_address_space_size { 122728c4afcSBin Meng ACPI_ACCESS_SIZE_UNDEFINED = 0, 123728c4afcSBin Meng ACPI_ACCESS_SIZE_BYTE_ACCESS, 124728c4afcSBin Meng ACPI_ACCESS_SIZE_WORD_ACCESS, 125728c4afcSBin Meng ACPI_ACCESS_SIZE_DWORD_ACCESS, 126728c4afcSBin Meng ACPI_ACCESS_SIZE_QWORD_ACCESS 127867bcb63SSaket Sinha }; 128867bcb63SSaket Sinha 129728c4afcSBin Meng struct acpi_gen_regaddr { 130728c4afcSBin Meng u8 space_id; /* Address space ID */ 131728c4afcSBin Meng u8 bit_width; /* Register size in bits */ 132728c4afcSBin Meng u8 bit_offset; /* Register bit offset */ 133728c4afcSBin Meng u8 access_size; /* Access size */ 134728c4afcSBin Meng u32 addrl; /* Register address, low 32 bits */ 135728c4afcSBin Meng u32 addrh; /* Register address, high 32 bits */ 136867bcb63SSaket Sinha }; 137867bcb63SSaket Sinha 138867bcb63SSaket Sinha /* FADT (Fixed ACPI Description Table) */ 139867bcb63SSaket Sinha struct __packed acpi_fadt { 140867bcb63SSaket Sinha struct acpi_table_header header; 141867bcb63SSaket Sinha u32 firmware_ctrl; 142867bcb63SSaket Sinha u32 dsdt; 1438a8c0352SBin Meng u8 res1; 144867bcb63SSaket Sinha u8 preferred_pm_profile; 145867bcb63SSaket Sinha u16 sci_int; 146867bcb63SSaket Sinha u32 smi_cmd; 147867bcb63SSaket Sinha u8 acpi_enable; 148867bcb63SSaket Sinha u8 acpi_disable; 149867bcb63SSaket Sinha u8 s4bios_req; 150867bcb63SSaket Sinha u8 pstate_cnt; 151867bcb63SSaket Sinha u32 pm1a_evt_blk; 152867bcb63SSaket Sinha u32 pm1b_evt_blk; 153867bcb63SSaket Sinha u32 pm1a_cnt_blk; 154867bcb63SSaket Sinha u32 pm1b_cnt_blk; 155867bcb63SSaket Sinha u32 pm2_cnt_blk; 156867bcb63SSaket Sinha u32 pm_tmr_blk; 157867bcb63SSaket Sinha u32 gpe0_blk; 158867bcb63SSaket Sinha u32 gpe1_blk; 159867bcb63SSaket Sinha u8 pm1_evt_len; 160867bcb63SSaket Sinha u8 pm1_cnt_len; 161867bcb63SSaket Sinha u8 pm2_cnt_len; 162867bcb63SSaket Sinha u8 pm_tmr_len; 163867bcb63SSaket Sinha u8 gpe0_blk_len; 164867bcb63SSaket Sinha u8 gpe1_blk_len; 165867bcb63SSaket Sinha u8 gpe1_base; 166867bcb63SSaket Sinha u8 cst_cnt; 167867bcb63SSaket Sinha u16 p_lvl2_lat; 168867bcb63SSaket Sinha u16 p_lvl3_lat; 169867bcb63SSaket Sinha u16 flush_size; 170867bcb63SSaket Sinha u16 flush_stride; 171867bcb63SSaket Sinha u8 duty_offset; 172867bcb63SSaket Sinha u8 duty_width; 173867bcb63SSaket Sinha u8 day_alrm; 174867bcb63SSaket Sinha u8 mon_alrm; 175867bcb63SSaket Sinha u8 century; 176867bcb63SSaket Sinha u16 iapc_boot_arch; 177867bcb63SSaket Sinha u8 res2; 178867bcb63SSaket Sinha u32 flags; 179867bcb63SSaket Sinha struct acpi_gen_regaddr reset_reg; 180867bcb63SSaket Sinha u8 reset_value; 181*2dcbef6fSAndy Shevchenko u16 arm_boot_arch; 182*2dcbef6fSAndy Shevchenko u8 minor_revision; 183867bcb63SSaket Sinha u32 x_firmware_ctl_l; 184867bcb63SSaket Sinha u32 x_firmware_ctl_h; 185867bcb63SSaket Sinha u32 x_dsdt_l; 186867bcb63SSaket Sinha u32 x_dsdt_h; 187867bcb63SSaket Sinha struct acpi_gen_regaddr x_pm1a_evt_blk; 188867bcb63SSaket Sinha struct acpi_gen_regaddr x_pm1b_evt_blk; 189867bcb63SSaket Sinha struct acpi_gen_regaddr x_pm1a_cnt_blk; 190867bcb63SSaket Sinha struct acpi_gen_regaddr x_pm1b_cnt_blk; 191867bcb63SSaket Sinha struct acpi_gen_regaddr x_pm2_cnt_blk; 192867bcb63SSaket Sinha struct acpi_gen_regaddr x_pm_tmr_blk; 193867bcb63SSaket Sinha struct acpi_gen_regaddr x_gpe0_blk; 194867bcb63SSaket Sinha struct acpi_gen_regaddr x_gpe1_blk; 195867bcb63SSaket Sinha }; 196867bcb63SSaket Sinha 197728c4afcSBin Meng /* FACS flags */ 198728c4afcSBin Meng #define ACPI_FACS_S4BIOS_F (1 << 0) 199728c4afcSBin Meng #define ACPI_FACS_64BIT_WAKE_F (1 << 1) 200867bcb63SSaket Sinha 201867bcb63SSaket Sinha /* FACS (Firmware ACPI Control Structure) */ 202867bcb63SSaket Sinha struct acpi_facs { 203867bcb63SSaket Sinha char signature[4]; /* "FACS" */ 204867bcb63SSaket Sinha u32 length; /* Length in bytes (>= 64) */ 205867bcb63SSaket Sinha u32 hardware_signature; /* Hardware signature */ 206867bcb63SSaket Sinha u32 firmware_waking_vector; /* Firmware waking vector */ 207867bcb63SSaket Sinha u32 global_lock; /* Global lock */ 208867bcb63SSaket Sinha u32 flags; /* FACS flags */ 209867bcb63SSaket Sinha u32 x_firmware_waking_vector_l; /* X FW waking vector, low */ 210867bcb63SSaket Sinha u32 x_firmware_waking_vector_h; /* X FW waking vector, high */ 211728c4afcSBin Meng u8 version; /* Version 2 */ 2128a8c0352SBin Meng u8 res1[3]; 2138a8c0352SBin Meng u32 ospm_flags; /* OSPM enabled flags */ 2148a8c0352SBin Meng u8 res2[24]; 215867bcb63SSaket Sinha }; 216867bcb63SSaket Sinha 217728c4afcSBin Meng /* MADT flags */ 218728c4afcSBin Meng #define ACPI_MADT_PCAT_COMPAT (1 << 0) 219728c4afcSBin Meng 220728c4afcSBin Meng /* MADT (Multiple APIC Description Table) */ 221728c4afcSBin Meng struct acpi_madt { 222728c4afcSBin Meng struct acpi_table_header header; 223728c4afcSBin Meng u32 lapic_addr; /* Local APIC address */ 224728c4afcSBin Meng u32 flags; /* Multiple APIC flags */ 225728c4afcSBin Meng }; 226728c4afcSBin Meng 227728c4afcSBin Meng /* MADT: APIC Structure Type*/ 228728c4afcSBin Meng enum acpi_apic_types { 229728c4afcSBin Meng ACPI_APIC_LAPIC = 0, /* Processor local APIC */ 230728c4afcSBin Meng ACPI_APIC_IOAPIC, /* I/O APIC */ 231728c4afcSBin Meng ACPI_APIC_IRQ_SRC_OVERRIDE, /* Interrupt source override */ 232728c4afcSBin Meng ACPI_APIC_NMI_SRC, /* NMI source */ 233728c4afcSBin Meng ACPI_APIC_LAPIC_NMI, /* Local APIC NMI */ 234728c4afcSBin Meng ACPI_APIC_LAPIC_ADDR_OVERRIDE, /* Local APIC address override */ 235728c4afcSBin Meng ACPI_APIC_IOSAPIC, /* I/O SAPIC */ 236728c4afcSBin Meng ACPI_APIC_LSAPIC, /* Local SAPIC */ 237728c4afcSBin Meng ACPI_APIC_PLATFORM_IRQ_SRC, /* Platform interrupt sources */ 238728c4afcSBin Meng ACPI_APIC_LX2APIC, /* Processor local x2APIC */ 239728c4afcSBin Meng ACPI_APIC_LX2APIC_NMI, /* Local x2APIC NMI */ 240728c4afcSBin Meng }; 241728c4afcSBin Meng 242728c4afcSBin Meng /* MADT: Processor Local APIC Structure */ 243728c4afcSBin Meng 244728c4afcSBin Meng #define LOCAL_APIC_FLAG_ENABLED (1 << 0) 245728c4afcSBin Meng 246728c4afcSBin Meng struct acpi_madt_lapic { 247728c4afcSBin Meng u8 type; /* Type (0) */ 248728c4afcSBin Meng u8 length; /* Length in bytes (8) */ 249728c4afcSBin Meng u8 processor_id; /* ACPI processor ID */ 250728c4afcSBin Meng u8 apic_id; /* Local APIC ID */ 251728c4afcSBin Meng u32 flags; /* Local APIC flags */ 252728c4afcSBin Meng }; 253728c4afcSBin Meng 254728c4afcSBin Meng /* MADT: I/O APIC Structure */ 255728c4afcSBin Meng struct acpi_madt_ioapic { 256728c4afcSBin Meng u8 type; /* Type (1) */ 257728c4afcSBin Meng u8 length; /* Length in bytes (12) */ 258728c4afcSBin Meng u8 ioapic_id; /* I/O APIC ID */ 259728c4afcSBin Meng u8 reserved; 260728c4afcSBin Meng u32 ioapic_addr; /* I/O APIC address */ 261728c4afcSBin Meng u32 gsi_base; /* Global system interrupt base */ 262728c4afcSBin Meng }; 263728c4afcSBin Meng 264728c4afcSBin Meng /* MADT: Interrupt Source Override Structure */ 265728c4afcSBin Meng struct __packed acpi_madt_irqoverride { 266728c4afcSBin Meng u8 type; /* Type (2) */ 267728c4afcSBin Meng u8 length; /* Length in bytes (10) */ 268728c4afcSBin Meng u8 bus; /* ISA (0) */ 269728c4afcSBin Meng u8 source; /* Bus-relative int. source (IRQ) */ 270728c4afcSBin Meng u32 gsirq; /* Global system interrupt */ 271728c4afcSBin Meng u16 flags; /* MPS INTI flags */ 272728c4afcSBin Meng }; 273728c4afcSBin Meng 274728c4afcSBin Meng /* MADT: Local APIC NMI Structure */ 275728c4afcSBin Meng struct __packed acpi_madt_lapic_nmi { 276728c4afcSBin Meng u8 type; /* Type (4) */ 277728c4afcSBin Meng u8 length; /* Length in bytes (6) */ 278728c4afcSBin Meng u8 processor_id; /* ACPI processor ID */ 279728c4afcSBin Meng u16 flags; /* MPS INTI flags */ 280728c4afcSBin Meng u8 lint; /* Local APIC LINT# */ 281728c4afcSBin Meng }; 282728c4afcSBin Meng 283728c4afcSBin Meng /* MCFG (PCI Express MMIO config space BAR description table) */ 284728c4afcSBin Meng struct acpi_mcfg { 285728c4afcSBin Meng struct acpi_table_header header; 286728c4afcSBin Meng u8 reserved[8]; 287728c4afcSBin Meng }; 288728c4afcSBin Meng 289728c4afcSBin Meng struct acpi_mcfg_mmconfig { 290728c4afcSBin Meng u32 base_address_l; 291728c4afcSBin Meng u32 base_address_h; 292728c4afcSBin Meng u16 pci_segment_group_number; 293728c4afcSBin Meng u8 start_bus_number; 294728c4afcSBin Meng u8 end_bus_number; 295728c4afcSBin Meng u8 reserved[4]; 296728c4afcSBin Meng }; 297728c4afcSBin Meng 2986aef68dcSBin Meng /* PM1_CNT bit defines */ 2996aef68dcSBin Meng #define PM1_CNT_SCI_EN (1 << 0) 3006aef68dcSBin Meng 30179c2c257SBin Meng /* ACPI global NVS structure */ 30279c2c257SBin Meng struct acpi_global_nvs; 30379c2c257SBin Meng 304867bcb63SSaket Sinha /* These can be used by the target port */ 305867bcb63SSaket Sinha 306dfbb18bcSBin Meng void acpi_fill_header(struct acpi_table_header *header, char *signature); 307867bcb63SSaket Sinha void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs, 308867bcb63SSaket Sinha void *dsdt); 309fc4f5cccSBin Meng int acpi_create_madt_lapics(u32 current); 310ab5efd57SBin Meng int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, 311ab5efd57SBin Meng u32 addr, u32 gsi_base); 312ab5efd57SBin Meng int acpi_create_madt_irqoverride(struct acpi_madt_irqoverride *irqoverride, 313ab5efd57SBin Meng u8 bus, u8 source, u32 gsirq, u16 flags); 314ab5efd57SBin Meng int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi, 315ab5efd57SBin Meng u8 cpu, u16 flags, u8 lint); 3167e79a6bcSBin Meng u32 acpi_fill_madt(u32 current); 31779c2c257SBin Meng void acpi_create_gnvs(struct acpi_global_nvs *gnvs); 31899572785SBin Meng /** 31999572785SBin Meng * enter_acpi_mode() - enter into ACPI mode 32099572785SBin Meng * 32199572785SBin Meng * This programs the ACPI-defined PM1_CNT register to enable SCI interrupt 32299572785SBin Meng * so that the whole system swiches to ACPI mode. 32399572785SBin Meng * 32499572785SBin Meng * @pm1_cnt: PM1_CNT register I/O address 32599572785SBin Meng */ 32699572785SBin Meng void enter_acpi_mode(int pm1_cnt); 32742fd8c19SSimon Glass ulong write_acpi_tables(ulong start); 328e76bf38fSBin Meng 329e76bf38fSBin Meng /** 3300f4e2588SBin Meng * acpi_find_fadt() - find ACPI FADT table in the sytem memory 3310f4e2588SBin Meng * 3320f4e2588SBin Meng * This routine parses the ACPI table to locate the ACPI FADT table. 3330f4e2588SBin Meng * 3340f4e2588SBin Meng * @return: a pointer to the ACPI FADT table in the system memory 3350f4e2588SBin Meng */ 3360f4e2588SBin Meng struct acpi_fadt *acpi_find_fadt(void); 3370f4e2588SBin Meng 3380f4e2588SBin Meng /** 339e76bf38fSBin Meng * acpi_find_wakeup_vector() - find OS installed wake up vector address 340e76bf38fSBin Meng * 341e76bf38fSBin Meng * This routine parses the ACPI table to locate the wake up vector installed 342e76bf38fSBin Meng * by the OS previously. 343e76bf38fSBin Meng * 344e76bf38fSBin Meng * @return: wake up vector address installed by the OS 345e76bf38fSBin Meng */ 3460f4e2588SBin Meng void *acpi_find_wakeup_vector(struct acpi_fadt *); 347