-// Support for enabling/disabling BIOS ram shadowing.
+// Support for generating ACPI tables (on emulators)
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2006 Fabrice Bellard
//
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 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
/****************************************************/
BSD license) */
#define ACPI_TABLE_HEADER_DEF /* ACPI common table header */ \
- u8 signature [4]; /* 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 */
+ 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_TABLE_HEADER_DEF
+} PACKED;
/*
* 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_TABLE_HEADER_DEF /* ACPI common table header */
+ u32 table_offset_entry [3]; /* Array of pointers to other */
+ /* ACPI tables */
+} PACKED;
/*
* ACPI 1.0 Firmware ACPI Control Structure (FACS)
*/
+#define FACS_SIGNATURE 0x53434146 // FACS
struct facs_descriptor_rev1
{
- u8 signature[4]; /* 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 */
-};
+ 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 */
+} PACKED;
/*
* 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 */
+ 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 */
+ 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;
+ u32 flags;
#endif
-};
+} PACKED;
/*
* MADT values and structures
/* 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 */
+ 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;
+ u32 PCATcompat : 1; /* A one indicates system also has dual 8259s */
+ u32 reserved1 : 31;
#else
- u32 flags;
+ u32 flags;
#endif
-};
+} PACKED;
/* Values for Type in APIC_HEADER_DEF */
/*
* MADT sub-structures (Follow MULTIPLE_APIC_DESCRIPTION_TABLE)
*/
-#define APIC_HEADER_DEF /* Common APIC sub-structure header */\
- u8 type; \
- u8 length;
+#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 */
+ 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 */
+ u32 processor_enabled: 1; /* Processor is usable if set */
+ u32 reserved2 : 31; /* Reserved, must be zero */
#else
- u32 flags;
+ u32 flags;
#endif
-};
+} PACKED;
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 */
-};
+ 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 */
+} PACKED;
+
+#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 void acpi_build_table_header(struct acpi_table_header *h,
- char *sig, int len, u8 rev)
+ u32 sig, int len, u8 rev)
{
- memcpy(h->signature, sig, 4);
+ h->signature = sig;
h->length = cpu_to_le32(len);
h->revision = rev;
-#if (CONFIG_QEMU == 1)
- memcpy(h->oem_id, "QEMU ", 6);
- memcpy(h->oem_table_id, "QEMU", 4);
-#else
- memcpy(h->oem_id, "BOCHS ", 6);
- memcpy(h->oem_table_id, "BXPC", 4);
-#endif
- memcpy(h->oem_table_id + 4, sig, 4);
+ 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);
-#if (CONFIG_QEMU == 1)
- memcpy(h->asl_compiler_id, "QEMU", 4);
-#else
- memcpy(h->asl_compiler_id, "BXPC", 4);
-#endif
h->asl_compiler_revision = cpu_to_le32(1);
- h->checksum = -checksum((void *)h, len);
+ h->checksum = -checksum(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 = CountCPUs;
int acpi_cpus = smp_cpus > 0xff ? 0xff : smp_cpus;
ssdt_ptr[9] = 0; // checksum;
}
acpi_build_table_header((struct acpi_table_header *)ssdt,
- "SSDT", ssdt_ptr - ssdt, 1);
+ 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.
- PCIDevice d;
- int ret = pci_find_device(0x8086, 0x7113, 0, &d);
- if (ret)
+ int bdf = pci_find_device(PCI_VENDOR_ID_INTEL
+ , PCI_DEVICE_ID_INTEL_82371AB_3);
+ if (bdf < 0)
// Device not found
return;
int i;
/* reserve memory space for tables */
-#if (CONFIG_USE_EBDA_TABLES == 1)
- ebda_cur_addr = ALIGN(ebda_cur_addr, 16);
- rsdp = (void *)(ebda_cur_addr);
- ebda_cur_addr += sizeof(*rsdp);
-#else
bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
- rsdp = (void *)(bios_table_cur_addr);
+ rsdp = (void *)bios_table_cur_addr;
bios_table_cur_addr += sizeof(*rsdp);
-#endif
- addr = base_addr = GET_EBDA(ram_size) - CONFIG_ACPI_DATA_SIZE;
+ addr = base_addr = RamSize - CONFIG_ACPI_DATA_SIZE;
add_e820(addr, CONFIG_ACPI_DATA_SIZE, E820_ACPI);
rsdt_addr = addr;
rsdt = (void *)(addr);
fadt = (void *)(addr);
addr += sizeof(*fadt);
- /* XXX: FACS should be in RAM */
- addr = (addr + 63) & ~63; /* 64 byte alignment for FACS */
+ addr = ALIGN(addr, 64);
facs_addr = addr;
facs = (void *)(addr);
addr += sizeof(*facs);
ssdt = (void *)(addr);
addr += acpi_build_processor_ssdt(ssdt);
- addr = (addr + 7) & ~7;
+ int smp_cpus = CountCPUs;
+ addr = ALIGN(addr, 8);
madt_addr = addr;
madt_size = sizeof(*madt) +
sizeof(struct madt_processor_apic) * smp_cpus +
/* RSDP */
memset(rsdp, 0, sizeof(*rsdp));
- memcpy(rsdp->signature, "RSD PTR ", 8);
-#if (CONFIG_QEMU == 1)
- memcpy(rsdp->oem_id, "QEMU ", 6);
-#else
- memcpy(rsdp->oem_id, "BOCHS ", 6);
-#endif
+ 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);
+ rsdp->checksum = -checksum(rsdp, 20);
+ RsdpAddr = rsdp;
/* RSDT */
memset(rsdt, 0, sizeof(*rsdt));
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", sizeof(*rsdt), 1);
+ RSDT_SIGNATURE, sizeof(*rsdt), 1);
/* FADT */
memset(fadt, 0, sizeof(*fadt));
fadt->dsdt = cpu_to_le32(dsdt_addr);
fadt->model = 1;
fadt->reserved1 = 0;
- int pm_sci_int = pci_config_readb(d, PCI_INTERRUPT_LINE);
+ 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(BUILD_SMI_CMD_IO_ADDR);
+ fadt->smi_cmd = cpu_to_le32(PORT_SMI_CMD);
fadt->acpi_enable = 0xf1;
fadt->acpi_disable = 0xf0;
- fadt->pm1a_evt_blk = cpu_to_le32(BUILD_PM_IO_BASE);
- fadt->pm1a_cnt_blk = cpu_to_le32(BUILD_PM_IO_BASE + 0x04);
- fadt->pm_tmr_blk = cpu_to_le32(BUILD_PM_IO_BASE + 0x08);
+ 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->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",
+ acpi_build_table_header((struct acpi_table_header *)fadt, FACP_SIGNATURE,
sizeof(*fadt), 1);
/* FACS */
memset(facs, 0, sizeof(*facs));
- memcpy(facs->signature, "FACS", 4);
+ facs->signature = FACS_SIGNATURE;
facs->length = cpu_to_le32(sizeof(*facs));
/* DSDT */
memcpy(dsdt, AmlCode, sizeof(AmlCode));
/* MADT */
- {
- struct madt_processor_apic *apic;
- struct madt_io_apic *io_apic;
-
- memset(madt, 0, madt_size);
- madt->local_apic_address = cpu_to_le32(0xfee00000);
- madt->flags = cpu_to_le32(1);
- apic = (void *)(madt + 1);
- for(i=0;i<smp_cpus;i++) {
- apic->type = APIC_PROCESSOR;
- apic->length = sizeof(*apic);
- apic->processor_id = i;
- apic->local_apic_id = i;
- apic->flags = cpu_to_le32(1);
- 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(0xfec00000);
- io_apic->interrupt = cpu_to_le32(0);
-
- acpi_build_table_header((struct acpi_table_header *)madt,
- "APIC", madt_size, 1);
+ 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;i<smp_cpus;i++) {
+ apic->type = 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 = (void*)&io_apic[1];
+ for (i = 0; i < 16; i++) {
+ if (!(PCI_ISA_IRQ_MASK & (1 << i)))
+ /* No need for a INT source override structure. */
+ continue;
+ 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 */
+ 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;
}
projects / seabios.git / blobdiff