ACPI!ACPIBuildProcessDevicePhasePsc函数分析对节点iSA的处理

ACPI!ACPIBuildProcessDevicePhasePsc函数分析对节点iSA的处理

1: kd> g
Breakpoint 5 hit
eax=00000016 ebx=00000016 ecx=89984198 edx=00000001 esi=89984188 edi=80b019f4
eip=f73fb911 esp=f78aef68 ebp=f78aef84 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIBuildProcessGenericList+0x4d:
f73fb911 ff55f4 call dword ptr [ebp-0Ch] ss:0010:f78aef78={ACPI!ACPIBuildProcessDevicePhasePsc (f73fb57c)}
1: kd> kc
#
00 ACPI!ACPIBuildProcessDevicePhasePsc
01 ACPI!ACPIBuildProcessGenericList
02 ACPI!ACPIBuildDeviceDpc
03 nt!KiRetireDpcList
04 nt!KiDispatchInterrupt
WARNING: Frame IP not in any known module. Following frames may be wrong.
05 0x0
1: kd> dv
BuildRequest = 0x89984188
matrixIndex = 0n8 (No matching enumerant)
i = 0n-1986510456 (No matching enumerant)

typedef enum _SYSTEM_POWER_STATE {
PowerSystemUnspecified = 0,
PowerSystemWorking = 1,
PowerSystemSleeping1 = 2,
PowerSystemSleeping2 = 3,
PowerSystemSleeping3 = 4,
PowerSystemHibernate = 5,
PowerSystemShutdown = 6,
PowerSystemMaximum = 7
} SYSTEM_POWER_STATE, *PSYSTEM_POWER_STATE;

1: kd> dv matrixIndex
matrixIndex = PowerSystemSleeping1 (0n2)
2 3 4 5

//
// For each S state, walk PR0 to PR2 until you find a resource that
// cannot be ON in S state. The next lighter D state is then the lightest
// D state for the given S state.
//
for ( ; matrixIndex <= PowerSystemHibernate ; matrixIndex++ ) {

//
// Loop on all members of the PowerNode
//
for (i = PowerDeviceD0; i <= PowerDeviceD2; i++ ) {

1: kd> dx -id 0,0,899a2278 -r1 (*((ACPI!_ACPI_POWER_INFO *)0x899c0b18))
(*((ACPI!_ACPI_POWER_INFO *)0x899c0b18)) [Type: _ACPI_POWER_INFO]
[+0x000] Context : 0x0 [Type: void *]
[+0x004] PowerState : PowerDeviceUnspecified (0) [Type: _DEVICE_POWER_STATE]
[+0x008] DeviceNotifyHandler : 0x0 [Type: void (*)(void *,unsigned long)]
[+0x00c] HandlerContext : 0x0 [Type: void *]
[+0x010] PowerNode [Type: _ACPI_DEVICE_POWER_NODE * [4]]//这个
[+0x020] PowerObject [Type: _NSObj * [5]]
[+0x034] WakeBit : 0x0 [Type: unsigned long]
[+0x038] DevicePowerMatrix [Type: _DEVICE_POWER_STATE [7]]//这个
1: kd> dx -id 0,0,899a2278 -r1 (*((ACPI!_ACPI_DEVICE_POWER_NODE * (*)[4])0x899c0b28))
(*((ACPI!_ACPI_DEVICE_POWER_NODE * (*)[4])0x899c0b28)) [Type: _ACPI_DEVICE_POWER_NODE * [4]]
[0] : 0x0 [Type: _ACPI_DEVICE_POWER_NODE *]
[1] : 0x0 [Type: _ACPI_DEVICE_POWER_NODE *]
[2] : 0x0 [Type: _ACPI_DEVICE_POWER_NODE *]
[3] : 0x0 [Type: _ACPI_DEVICE_POWER_NODE *]
1: kd> dx -id 0,0,899a2278 -r1 (*((ACPI!_DEVICE_POWER_STATE (*)[7])0x899c0b50))
(*((ACPI!_DEVICE_POWER_STATE (*)[7])0x899c0b50)) [Type: _DEVICE_POWER_STATE [7]]
[0] : PowerDeviceUnspecified (0) [Type: _DEVICE_POWER_STATE]
[1] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[2] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[3] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[4] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[5] : PowerDeviceD3 (4) [Type: _DEVICE_POWER_STATE]
[6] : PowerDeviceD3 (4) [Type: _DEVICE_POWER_STATE]
1: kd> dd 0x899c0b50
899c0b50 00000000 00000001 00000001 00000001
899c0b60 00000001 00000004 00000004 00000000

typedef enum _DEVICE_POWER_STATE {
PowerDeviceUnspecified = 0,
PowerDeviceD0,
PowerDeviceD1,
PowerDeviceD2,
PowerDeviceD3,
PowerDeviceMaximum
} DEVICE_POWER_STATE, *PDEVICE_POWER_STATE;

1: kd> dv
BuildRequest = 0x00000004
matrixIndex = PowerSystemSleeping2 (0n3)
i = PowerDeviceD3 (0n4)

//
// If we have had a device node, but don't have now, that means
// that we found a D level that is compliant for this S-state
//
if (deviceNode == NULL) {

ACPIDevPrint( (
ACPI_PRINT_LOADING,
deviceExtension,
"ACPIBuildDeviceProcessPhasePsc: D%x <-> S%x\n",
(i - PowerDeviceD0),
matrixIndex - PowerSystemWorking
) );

//
// This device can be in Di state while in SmatrixIndex state
//
powerInfo->DevicePowerMatrix[matrixIndex] = i;
break;

1: kd> dx -id 0,0,899a2278 -r1 (*((ACPI!_ACPI_POWER_INFO *)0x899c0b18))
(*((ACPI!_ACPI_POWER_INFO *)0x899c0b18)) [Type: _ACPI_POWER_INFO]
[+0x000] Context : 0x0 [Type: void *]
[+0x004] PowerState : PowerDeviceUnspecified (0) [Type: _DEVICE_POWER_STATE]
[+0x008] DeviceNotifyHandler : 0x0 [Type: void (*)(void *,unsigned long)]
[+0x00c] HandlerContext : 0x0 [Type: void *]
[+0x010] PowerNode [Type: _ACPI_DEVICE_POWER_NODE * [4]]
[+0x020] PowerObject [Type: _NSObj * [5]]
[+0x034] WakeBit : 0x0 [Type: unsigned long]
[+0x038] DevicePowerMatrix [Type: _DEVICE_POWER_STATE [7]]
[+0x054] SystemWakeLevel : PowerSystemUnspecified (0) [Type: _SYSTEM_POWER_STATE]

//
// Now that we have built the matrix, we can figure out what D-level the
// device can support wake with.
//
powerInfo->DeviceWakeLevel =
powerInfo->DevicePowerMatrix[powerInfo->SystemWakeLevel];

1: kd> dx -id 0,0,899a2278 -r1 (*((ACPI!_DEVICE_POWER_STATE (*)[7])0x899c0b50))
(*((ACPI!_DEVICE_POWER_STATE (*)[7])0x899c0b50)) [Type: _DEVICE_POWER_STATE [7]]
[0] : PowerDeviceUnspecified (0) [Type: _DEVICE_POWER_STATE]
[1] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[2] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[3] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[4] : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
[5] : PowerDeviceD3 (4) [Type: _DEVICE_POWER_STATE]
[6] : PowerDeviceD3 (4) [Type: _DEVICE_POWER_STATE]

typedef enum _SYSTEM_POWER_STATE {
PowerSystemUnspecified = 0,
PowerSystemWorking = 1,
PowerSystemSleeping1 = 2, 2
PowerSystemSleeping2 = 3, 3
PowerSystemSleeping3 = 4, 4
PowerSystemHibernate = 5, 5
PowerSystemShutdown = 6,
PowerSystemMaximum = 7
} SYSTEM_POWER_STATE, *PSYSTEM_POWER_STATE;

外循环循环4次，内循环循环3次，共循环12次。

typedef enum _DEVICE_POWER_STATE {
PowerDeviceUnspecified = 0,
PowerDeviceD0, 1
PowerDeviceD1, 2
PowerDeviceD2, 3
PowerDeviceD3,
PowerDeviceMaximum
} DEVICE_POWER_STATE, *PDEVICE_POWER_STATE;

for ( ; matrixIndex <= PowerSystemHibernate ; matrixIndex++ ) {

//
// Loop on all members of the PowerNode
//
for (i = PowerDeviceD0; i <= PowerDeviceD2; i++ ) {

//
// Are there any resources to look at?
//
deviceNode = powerInfo->PowerNode[i];
if (deviceNode == NULL) {

continue;

}