User guide

Table 10–3 (Cont.) VME Address
Field Name Description
<13:12> Page
Monitor
Specifies how a Digital Alpha VME 4 system checks the scatter-
gather entry for access, according to the following values:
0 No monitoring of the page.
1 Each time the page is accessed, Monitor 1 is incremented.
2 Each time the page is accessed, Monitor 2 is incremented.
3 Each time the page is accessed, Monitor 3 is incremented.
The counters are readable in the VME Interface Processor Page
Monitor CSR, (VIP_PMCSR) shown in Figure 10–10.
<31:14> Memory
Page
PCI uses C/BE<3:0> signals to specify which bytes are being accessed.
Table 10–4 PCI Address
Field Description
<1:0> Set to 00 to pad.
<12:2> VME Address
<30:13> Memory Page, that is, bits <31:14> of the VME address.
<31> Set to 0 to force access to the lower 2GB of PCI memory space. Configuration
cycles are never initiated by the VME interface.
Figure 10–10 VME Interface Processor Page Monitor CSR
31 07 06 04 03 02 00
ML013343
Inbound Scatter-Gather Page Monitor 3
Inbound Scatter-Gather Page Monitor 2
Don't Care
VME_IF_BASE+118 :
Inbound Scatter-Gather Page Monitor 1
VIP_PMCSR
08101112
VME Interface 10–13