Adaptec 1737100 Programmer Manual - Page 94
Type: R, Internal Registers Subgroup: PCI Functional Registers, Byte Address: 4Ch - 4Fh, Type: R/W,
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AIC-6915 Ethernet LAN Controller Programmer's Manual PCIMonitor2 Register Type: R Internal Registers Subgroup: PCI Functional Registers Byte Address: 4Ch - 4Fh Table 7-30. PCI Monitor2 Register Reset Bit(s) rw Value Description/Function 31:16 r 0 PCIMasterBusUtilization: Provides a count of the total number of PCI clock cycles that the AIC-6915 asserts PCI_FRAME_ as an active PCI master, measured from the time the software driver resets the register. The count is presented in; 1 unit=64PCIClkCycles. The calculated PCI bus utilization is: ActiveTransferCount / (PCISlaveBusUtilization/64 + PCIMasterBusUtilization) This field is reset to zero if ACTIVETRANSFERCOUNT wraps around to 0. 15:0 r 0 ActiveTransferCount: Provides a count of the total number of PCI DMA data transfers (PCI_IRDY_ & PCI_TRDY_ are asserted). The count is presented in 1unit = 64cycles. This field is reset to zero if PCIMASTERBUSUTILIZATION wraps around to 0. PMC (Power Management Capabilities) Register Type: R/W Internal Registers Subgroup: PCI Functional Registers Byte Address: 50h - 53h Bit(s) 31:27 26 25 24:22 21 20 19 Table 7-31. Power Management Register Reset rw Value Description/Function r 00100b PmeSupport: Indicates the power state that the device supports when asserting PME_. The AIC-6915 is capable of asserting PME_ from the D0, D1 and D2 power states. PME is asserted when detecting a 'wake-up' frame or Link Fail. r 1 D2Support: The AIC-6915 supports the D2 power management state. r 0 D1Support: The AIC-6915 does not support the D1 power management state. r 0 Reserved: Always read as 0. r 0 DSI: This bit indicates whether special initialization of the function is required before the generic class device driver is able to use it. The AIC-6915 does not require special initialization. r 0 Auxiliary Power Source: This bit is only meaningful when PME_ is supported in D3 (cold) state. The AIC-6915 does not support this function. r 0 PME Clock, Setting this bit indicates that the function relies on the presence of the PCI clock for PME_ operation. The AIC-6915 generates PME_ without PCI clock. 7-22