// Support for generating ACPI tables (on emulators) // // Copyright (C) 2008 Kevin O'Connor // Copyright (C) 2006 Fabrice Bellard // // This file may be distributed under the terms of the GNU GPLv3 license. #include "acpi.h" // struct rsdp_descriptor #include "util.h" // memcpy #include "memmap.h" // bios_table_cur_addr #include "pci.h" // pci_find_device #include "biosvar.h" // GET_EBDA #include "pci_ids.h" // PCI_VENDOR_ID_INTEL #include "pci_regs.h" // PCI_INTERRUPT_LINE /****************************************************/ /* ACPI tables init */ /* Table structure from Linux kernel (the ACPI tables are under the BSD license) */ #define ACPI_TABLE_HEADER_DEF /* ACPI common table header */ \ u32 signature; /* ACPI signature (4 ASCII characters) */\ u32 length; /* Length of table, in bytes, including header */\ u8 revision; /* ACPI Specification minor version # */\ u8 checksum; /* To make sum of entire table == 0 */\ u8 oem_id [6]; /* OEM identification */\ u8 oem_table_id [8]; /* OEM table identification */\ u32 oem_revision; /* OEM revision number */\ u8 asl_compiler_id [4]; /* ASL compiler vendor ID */\ u32 asl_compiler_revision; /* ASL compiler revision number */ struct acpi_table_header /* ACPI common table header */ { ACPI_TABLE_HEADER_DEF }; /* * ACPI 1.0 Root System Description Table (RSDT) */ #define RSDT_SIGNATURE 0x54445352 // RSDT struct rsdt_descriptor_rev1 { ACPI_TABLE_HEADER_DEF /* ACPI common table header */ u32 table_offset_entry [3]; /* Array of pointers to other */ /* ACPI tables */ }; /* * ACPI 1.0 Firmware ACPI Control Structure (FACS) */ #define FACS_SIGNATURE 0x53434146 // FACS struct facs_descriptor_rev1 { u32 signature; /* ACPI Signature */ u32 length; /* Length of structure, in bytes */ u32 hardware_signature; /* Hardware configuration signature */ u32 firmware_waking_vector; /* ACPI OS waking vector */ u32 global_lock; /* Global Lock */ u32 S4bios_f : 1; /* Indicates if S4BIOS support is present */ u32 reserved1 : 31; /* Must be 0 */ u8 resverved3 [40]; /* Reserved - must be zero */ }; /* * ACPI 1.0 Fixed ACPI Description Table (FADT) */ #define FACP_SIGNATURE 0x50434146 // FACP struct fadt_descriptor_rev1 { ACPI_TABLE_HEADER_DEF /* ACPI common table header */ u32 firmware_ctrl; /* Physical address of FACS */ u32 dsdt; /* Physical address of DSDT */ u8 model; /* System Interrupt Model */ u8 reserved1; /* Reserved */ u16 sci_int; /* System vector of SCI interrupt */ u32 smi_cmd; /* Port address of SMI command port */ u8 acpi_enable; /* Value to write to smi_cmd to enable ACPI */ u8 acpi_disable; /* Value to write to smi_cmd to disable ACPI */ u8 S4bios_req; /* Value to write to SMI CMD to enter S4BIOS state */ u8 reserved2; /* Reserved - must be zero */ u32 pm1a_evt_blk; /* Port address of Power Mgt 1a acpi_event Reg Blk */ u32 pm1b_evt_blk; /* Port address of Power Mgt 1b acpi_event Reg Blk */ u32 pm1a_cnt_blk; /* Port address of Power Mgt 1a Control Reg Blk */ u32 pm1b_cnt_blk; /* Port address of Power Mgt 1b Control Reg Blk */ u32 pm2_cnt_blk; /* Port address of Power Mgt 2 Control Reg Blk */ u32 pm_tmr_blk; /* Port address of Power Mgt Timer Ctrl Reg Blk */ u32 gpe0_blk; /* Port addr of General Purpose acpi_event 0 Reg Blk */ u32 gpe1_blk; /* Port addr of General Purpose acpi_event 1 Reg Blk */ u8 pm1_evt_len; /* Byte length of ports at pm1_x_evt_blk */ u8 pm1_cnt_len; /* Byte length of ports at pm1_x_cnt_blk */ u8 pm2_cnt_len; /* Byte Length of ports at pm2_cnt_blk */ u8 pm_tmr_len; /* Byte Length of ports at pm_tm_blk */ u8 gpe0_blk_len; /* Byte Length of ports at gpe0_blk */ u8 gpe1_blk_len; /* Byte Length of ports at gpe1_blk */ u8 gpe1_base; /* Offset in gpe model where gpe1 events start */ u8 reserved3; /* Reserved */ u16 plvl2_lat; /* Worst case HW latency to enter/exit C2 state */ u16 plvl3_lat; /* Worst case HW latency to enter/exit C3 state */ u16 flush_size; /* Size of area read to flush caches */ u16 flush_stride; /* Stride used in flushing caches */ u8 duty_offset; /* Bit location of duty cycle field in p_cnt reg */ u8 duty_width; /* Bit width of duty cycle field in p_cnt reg */ u8 day_alrm; /* Index to day-of-month alarm in RTC CMOS RAM */ u8 mon_alrm; /* Index to month-of-year alarm in RTC CMOS RAM */ u8 century; /* Index to century in RTC CMOS RAM */ u8 reserved4; /* Reserved */ u8 reserved4a; /* Reserved */ u8 reserved4b; /* Reserved */ #if 0 u32 wb_invd : 1; /* The wbinvd instruction works properly */ u32 wb_invd_flush : 1; /* The wbinvd flushes but does not invalidate */ u32 proc_c1 : 1; /* All processors support C1 state */ u32 plvl2_up : 1; /* C2 state works on MP system */ u32 pwr_button : 1; /* Power button is handled as a generic feature */ u32 sleep_button : 1; /* Sleep button is handled as a generic feature, or not present */ u32 fixed_rTC : 1; /* RTC wakeup stat not in fixed register space */ u32 rtcs4 : 1; /* RTC wakeup stat not possible from S4 */ u32 tmr_val_ext : 1; /* The tmr_val width is 32 bits (0 = 24 bits) */ u32 reserved5 : 23; /* Reserved - must be zero */ #else u32 flags; #endif }; /* * MADT values and structures */ /* Values for MADT PCATCompat */ #define DUAL_PIC 0 #define MULTIPLE_APIC 1 /* Master MADT */ #define APIC_SIGNATURE 0x43495041 // APIC struct multiple_apic_table { ACPI_TABLE_HEADER_DEF /* ACPI common table header */ u32 local_apic_address; /* Physical address of local APIC */ #if 0 u32 PCATcompat : 1; /* A one indicates system also has dual 8259s */ u32 reserved1 : 31; #else u32 flags; #endif }; /* Values for Type in APIC_HEADER_DEF */ #define APIC_PROCESSOR 0 #define APIC_IO 1 #define APIC_XRUPT_OVERRIDE 2 #define APIC_NMI 3 #define APIC_LOCAL_NMI 4 #define APIC_ADDRESS_OVERRIDE 5 #define APIC_IO_SAPIC 6 #define APIC_LOCAL_SAPIC 7 #define APIC_XRUPT_SOURCE 8 #define APIC_RESERVED 9 /* 9 and greater are reserved */ /* * MADT sub-structures (Follow MULTIPLE_APIC_DESCRIPTION_TABLE) */ #define APIC_HEADER_DEF /* Common APIC sub-structure header */\ u8 type; \ u8 length; /* Sub-structures for MADT */ struct madt_processor_apic { APIC_HEADER_DEF u8 processor_id; /* ACPI processor id */ u8 local_apic_id; /* Processor's local APIC id */ #if 0 u32 processor_enabled: 1; /* Processor is usable if set */ u32 reserved2 : 31; /* Reserved, must be zero */ #else u32 flags; #endif }; struct madt_io_apic { APIC_HEADER_DEF u8 io_apic_id; /* I/O APIC ID */ u8 reserved; /* Reserved - must be zero */ u32 address; /* APIC physical address */ u32 interrupt; /* Global system interrupt where INTI * lines start */ }; #if CONFIG_KVM /* IRQs 5,9,10,11 */ #define PCI_ISA_IRQ_MASK 0x0e20 #else #define PCI_ISA_IRQ_MASK 0x0000 #endif struct madt_intsrcovr { APIC_HEADER_DEF u8 bus; u8 source; u32 gsi; u16 flags; } PACKED; #include "acpi-dsdt.hex" static inline u16 cpu_to_le16(u16 x) { return x; } static inline u32 cpu_to_le32(u32 x) { return x; } static void acpi_build_table_header(struct acpi_table_header *h, u32 sig, int len, u8 rev) { h->signature = sig; h->length = cpu_to_le32(len); h->revision = rev; memcpy(h->oem_id, CONFIG_APPNAME6, 6); memcpy(h->oem_table_id, CONFIG_APPNAME4, 4); memcpy(h->asl_compiler_id, CONFIG_APPNAME4, 4); memcpy(h->oem_table_id + 4, (void*)&sig, 4); h->oem_revision = cpu_to_le32(1); h->asl_compiler_revision = cpu_to_le32(1); h->checksum = -checksum((void *)h, len); } #define SSDT_SIGNATURE 0x54445353// SSDT static int acpi_build_processor_ssdt(u8 *ssdt) { u8 *ssdt_ptr = ssdt; int i, length; int smp_cpus = smp_probe(); int acpi_cpus = smp_cpus > 0xff ? 0xff : smp_cpus; ssdt_ptr[9] = 0; // checksum; ssdt_ptr += sizeof(struct acpi_table_header); // caluculate the length of processor block and scope block excluding PkgLength length = 0x0d * acpi_cpus + 4; // build processor scope header *(ssdt_ptr++) = 0x10; // ScopeOp if (length <= 0x3e) { *(ssdt_ptr++) = length + 1; } else { *(ssdt_ptr++) = 0x7F; *(ssdt_ptr++) = (length + 2) >> 6; } *(ssdt_ptr++) = '_'; // Name *(ssdt_ptr++) = 'P'; *(ssdt_ptr++) = 'R'; *(ssdt_ptr++) = '_'; // build object for each processor for(i=0;i> 4) < 0xa ? (i >> 4) + '0' : (i >> 4) + 'A' - 0xa; else *(ssdt_ptr++) = 'U'; *(ssdt_ptr++) = (i & 0xf) < 0xa ? (i & 0xf) + '0' : (i & 0xf) + 'A' - 0xa; *(ssdt_ptr++) = i; *(ssdt_ptr++) = 0x10; // Processor block address *(ssdt_ptr++) = 0xb0; *(ssdt_ptr++) = 0; *(ssdt_ptr++) = 0; *(ssdt_ptr++) = 6; // Processor block length } acpi_build_table_header((struct acpi_table_header *)ssdt, SSDT_SIGNATURE, ssdt_ptr - ssdt, 1); return ssdt_ptr - ssdt; } struct rsdp_descriptor *RsdpAddr; /* base_addr must be a multiple of 4KB */ void acpi_bios_init(void) { if (! CONFIG_ACPI) return; dprintf(3, "init ACPI tables\n"); // This code is hardcoded for PIIX4 Power Management device. int bdf = pci_find_device(PCI_VENDOR_ID_INTEL , PCI_DEVICE_ID_INTEL_82371AB_3); if (bdf < 0) // Device not found return; struct rsdp_descriptor *rsdp; struct rsdt_descriptor_rev1 *rsdt; struct fadt_descriptor_rev1 *fadt; struct facs_descriptor_rev1 *facs; struct multiple_apic_table *madt; u8 *dsdt, *ssdt; u32 base_addr, rsdt_addr, fadt_addr, addr, facs_addr, dsdt_addr, ssdt_addr; u32 acpi_tables_size, madt_addr, madt_size; int i; /* reserve memory space for tables */ bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16); rsdp = (void *)(bios_table_cur_addr); bios_table_cur_addr += sizeof(*rsdp); addr = base_addr = RamSize - CONFIG_ACPI_DATA_SIZE; add_e820(addr, CONFIG_ACPI_DATA_SIZE, E820_ACPI); rsdt_addr = addr; rsdt = (void *)(addr); addr += sizeof(*rsdt); fadt_addr = addr; fadt = (void *)(addr); addr += sizeof(*fadt); addr = ALIGN(addr, 64); facs_addr = addr; facs = (void *)(addr); addr += sizeof(*facs); dsdt_addr = addr; dsdt = (void *)(addr); addr += sizeof(AmlCode); ssdt_addr = addr; ssdt = (void *)(addr); addr += acpi_build_processor_ssdt(ssdt); int smp_cpus = smp_probe(); addr = ALIGN(addr, 8); madt_addr = addr; madt_size = sizeof(*madt) + sizeof(struct madt_processor_apic) * smp_cpus + sizeof(struct madt_io_apic); madt = (void *)(addr); addr += madt_size; acpi_tables_size = addr - base_addr; dprintf(1, "ACPI tables: RSDP addr=0x%08lx" " ACPI DATA addr=0x%08lx size=0x%x\n", (unsigned long)rsdp, (unsigned long)rsdt, acpi_tables_size); /* RSDP */ memset(rsdp, 0, sizeof(*rsdp)); rsdp->signature = RSDP_SIGNATURE; memcpy(rsdp->oem_id, CONFIG_APPNAME6, 6); rsdp->rsdt_physical_address = cpu_to_le32(rsdt_addr); rsdp->checksum = -checksum((void *)rsdp, 20); RsdpAddr = rsdp; /* RSDT */ memset(rsdt, 0, sizeof(*rsdt)); rsdt->table_offset_entry[0] = cpu_to_le32(fadt_addr); rsdt->table_offset_entry[1] = cpu_to_le32(madt_addr); rsdt->table_offset_entry[2] = cpu_to_le32(ssdt_addr); acpi_build_table_header((struct acpi_table_header *)rsdt, RSDT_SIGNATURE, sizeof(*rsdt), 1); /* FADT */ memset(fadt, 0, sizeof(*fadt)); fadt->firmware_ctrl = cpu_to_le32(facs_addr); fadt->dsdt = cpu_to_le32(dsdt_addr); fadt->model = 1; fadt->reserved1 = 0; int pm_sci_int = pci_config_readb(bdf, PCI_INTERRUPT_LINE); fadt->sci_int = cpu_to_le16(pm_sci_int); fadt->smi_cmd = cpu_to_le32(PORT_SMI_CMD); fadt->acpi_enable = 0xf1; fadt->acpi_disable = 0xf0; fadt->pm1a_evt_blk = cpu_to_le32(PORT_ACPI_PM_BASE); fadt->pm1a_cnt_blk = cpu_to_le32(PORT_ACPI_PM_BASE + 0x04); fadt->pm_tmr_blk = cpu_to_le32(PORT_ACPI_PM_BASE + 0x08); fadt->pm1_evt_len = 4; fadt->pm1_cnt_len = 2; fadt->pm_tmr_len = 4; fadt->plvl2_lat = cpu_to_le16(0xfff); // C2 state not supported fadt->plvl3_lat = cpu_to_le16(0xfff); // C3 state not supported /* WBINVD + PROC_C1 + PWR_BUTTON + SLP_BUTTON + FIX_RTC */ fadt->flags = cpu_to_le32((1 << 0) | (1 << 2) | (1 << 4) | (1 << 5) | (1 << 6)); acpi_build_table_header((struct acpi_table_header *)fadt, FACP_SIGNATURE, sizeof(*fadt), 1); /* FACS */ memset(facs, 0, sizeof(*facs)); facs->signature = FACS_SIGNATURE; facs->length = cpu_to_le32(sizeof(*facs)); /* DSDT */ memcpy(dsdt, AmlCode, sizeof(AmlCode)); /* MADT */ memset(madt, 0, madt_size); madt->local_apic_address = cpu_to_le32(BUILD_APIC_ADDR); madt->flags = cpu_to_le32(1); struct madt_processor_apic *apic = (void *)(madt + 1); for(i=0;itype = APIC_PROCESSOR; apic->length = sizeof(*apic); apic->processor_id = i; apic->local_apic_id = i; apic->flags = cpu_to_le32(1); apic++; } struct madt_io_apic *io_apic = (void *)apic; io_apic->type = APIC_IO; io_apic->length = sizeof(*io_apic); io_apic->io_apic_id = smp_cpus; io_apic->address = cpu_to_le32(BUILD_IOAPIC_ADDR); io_apic->interrupt = cpu_to_le32(0); struct madt_intsrcovr *intsrcovr = (struct madt_intsrcovr*)(io_apic + 1); for (i = 0; i < 16; i++) { if (PCI_ISA_IRQ_MASK & (1 << i)) { memset(intsrcovr, 0, sizeof(*intsrcovr)); intsrcovr->type = APIC_XRUPT_OVERRIDE; intsrcovr->length = sizeof(*intsrcovr); intsrcovr->source = i; intsrcovr->gsi = i; intsrcovr->flags = 0xd; /* active high, level triggered */ } else { /* No need for a INT source override structure. */ continue; } intsrcovr++; madt_size += sizeof(struct madt_intsrcovr); } acpi_build_table_header((struct acpi_table_header *)madt, APIC_SIGNATURE, madt_size, 1); } u32 find_resume_vector() { dprintf(4, "rsdp=%p\n", RsdpAddr); if (!RsdpAddr || RsdpAddr->signature != RSDP_SIGNATURE) return 0; struct rsdt_descriptor_rev1 *rsdt = (void*)RsdpAddr->rsdt_physical_address; dprintf(4, "rsdt=%p\n", rsdt); if (!rsdt || rsdt->signature != RSDT_SIGNATURE) return 0; void *end = (void*)rsdt + rsdt->length; int i; for (i=0; (void*)&rsdt->table_offset_entry[i] < end; i++) { struct fadt_descriptor_rev1 *fadt = (void*)rsdt->table_offset_entry[i]; if (!fadt || fadt->signature != FACP_SIGNATURE) continue; dprintf(4, "fadt=%p\n", fadt); struct facs_descriptor_rev1 *facs = (void*)fadt->firmware_ctrl; dprintf(4, "facs=%p\n", facs); if (! facs || facs->signature != FACS_SIGNATURE) return 0; // Found it. dprintf(4, "resume addr=%d\n", facs->firmware_waking_vector); return facs->firmware_waking_vector; } return 0; }