我想访问 BSD 中的物理内存。acpidump -t XSDT > xsdt_dump.asl它给出：
/*
RSD PTR: OEM=ALASKA, ACPI_Rev=2.0x (2)
XSDT=0x9aae8070, length=36, cksum=164
*/
/*
XSDT: Length=92, Revision=1, Checksum=244,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=AMI, Creator Revision=0x10013
Entries={ 0x9aaee2d8, 0x9aaee3d0, 0x9aaee458, 0x9aaee4a0, 0x9aaee560, 0x9aaee668, 0x9aaee6a8 }
*/
/*
FACP: Length=244, Revision=4, Checksum=153,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=AMI, Creator Revision=0x10013
FACS=0x9b2f9f80, DSDT=0x9aae8158
INT_MODEL=APIC
Preferred_PM_Profile=Workstation (3)
SCI_INT=9
SMI_CMD=0xb2, ACPI_ENABLE=0xa0, ACPI_DISABLE=0xa1, S4BIOS_REQ=0x0
PSTATE_CNT=0x0
PM1a_EVT_BLK=0x400-0x403
PM1a_CNT_BLK=0x404-0x405
PM2_CNT_BLK=0x450-0x450
PM_TMR_BLK=0x408-0x40b
GPE0_BLK=0x420-0x42f
P_LVL2_LAT=101 us, P_LVL3_LAT=1001 us
FLUSH_SIZE=1024, FLUSH_STRIDE=16
DUTY_OFFSET=1, DUTY_WIDTH=3
DAY_ALRM=13, MON_ALRM=0, CENTURY=50
IAPC_BOOT_ARCH={LEGACY_DEVICES}
Flags={WBINVD,C1_SUPPORTED,SLEEP_BUTTON,S4_RTC_WAKE,RESET_REGISTER,PLATFORM_CLOCK,S4_RTC_VALID,REMOTE_POWER_ON}
RESET_REG=0xcf9:0[8] (IO), RESET_VALUE=0x6
*/
/*
FACS: Length=64, HwSig=0x00000000, Firm_Wake_Vec=0x00000000
Global_Lock=
Flags=
Version=2
*/
/*
DSDT: Length=24957, Revision=2, Checksum=249,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x400,
Creator ID=INTL, Creator Revision=0x20051117
*/
/*
APIC: Length=132, Revision=3, Checksum=217,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=AMI, Creator Revision=0x10013
Local APIC ADDR=0xfee00000
Flags={PC-AT}
Type=Local APIC
ACPI CPU=0
Flags={ENABLED}
APIC ID=0
Type=Local APIC
ACPI CPU=2
Flags={ENABLED}
APIC ID=4
Type=Local APIC
ACPI CPU=1
Flags={ENABLED}
APIC ID=1
Type=Local APIC
ACPI CPU=3
Flags={ENABLED}
APIC ID=5
Type=IO APIC
APIC ID=0
INT BASE=0
ADDR=0x00000000fec00000
Type=INT Override
BUS=0
IRQ=0
INTR=2
Flags={Polarity=conforming, Trigger=conforming}
Type=INT Override
BUS=0
IRQ=9
INTR=9
Flags={Polarity=active-hi, Trigger=level}
Type=Local APIC NMI
ACPI CPU=0
LINT Pin=1
Flags={Polarity=active-hi, Trigger=edge}
Type=Local APIC NMI
ACPI CPU=2
LINT Pin=1
Flags={Polarity=active-hi, Trigger=edge}
Type=Local APIC NMI
ACPI CPU=1
LINT Pin=1
Flags={Polarity=active-hi, Trigger=edge}
Type=Local APIC NMI
ACPI CPU=3
LINT Pin=1
Flags={Polarity=active-hi, Trigger=edge}
*/
/*
FPDT: Length=68, Revision=1, Checksum=154,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=AMI, Creator Revision=0x10013
*/
/*
FIDT: Length=192, Revision=1, Checksum=222,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=AMI, Creator Revision=0x10013
*/
/*
SSDT: Length=258, Revision=1, Checksum=239,
OEMID=AMICPU, OEM Table ID=PROC, OEM Revision=0x1,
Creator ID=MSFT, Creator Revision=0x3000001
*/
/*
MCFG: Length=60, Revision=1, Checksum=155,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=MSFT, Creator Revision=0x97
Base Address=0x00000000e0000000
Segment Group=0x0000
Start Bus=0
End Bus=63
*/
/*
HPET: Length=56, Revision=1, Checksum=144,
OEMID=ALASKA, OEM Table ID=H55HC, OEM Revision=0x1072009,
Creator ID=AMI., Creator Revision=0x5
HPET Number=0
ADDR=0xfed00000:0[64] (Memory) HW Rev=0x1
Comparators=7
Counter Size=1
Legacy IRQ routing capable={TRUE}
PCI Vendor ID=0x8086
Minimal Tick=14318
*/
在 RSD PTR 表中，XSDT=0x9aae8070 是什么？这是 XSDT 表的地址吗？还是我需要添加其他地址才能从内存访问 XSDT 表？