ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 203

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

Preliminary
6.5: VIMEM Virtual Memory Total Bytes
This register defines the total number of bytes in the address space being allocated for Virtual Memory. The
contents of this register, divided by the configured size of virtual buffers, yields the total number of virtual
buffer indices that should be used to initialize POOLS. The value of the indices should range from this calcu-
lated value minus one, down to zero. If an address is determined to be above or equal to the Virtual Memory
Base Register it is assumed to be a virtual access. If the virtual buffer index derived from the requested
address indicates that the virtual buffer space being accessed is above the limit defined by this register, an
error is generated.
Length
Type
Address
Power On Value
Restrictions
pnr25.chapt04.01
August 14, 2000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Bit(s)
31-6
5-0
These bits contain the upper 26 bits of the total number of bytes of address space being reserved for Virtual Memory.
These bits are not implemented and are forced to ‘0’ because the Virtual Memory block can only be allocated in incre-
ments of the current virtual buffer size (minimum size is 64 bytes).
32 bits
Read/Write
XXXX 0D0C
X’0001 0000’
The maximum value that should be set in this register is (65535 * virtual buffer
size). For example, if 64-byte virtual buffers are configured, the maximum value
that should be loaded into this register is X’3FFFC0’.
Virtual Memory Address Space
Description
IBM Processor for Network Resources
9
8
ATM Virtual Memory Logic (VIMEM)
7
6
5
Not Implemented
4
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IBM3206K0424
3
2
1
0