4.3 System Control Coprocessor

PageMask Register (5)

The PageMask register is a read/write register used for reading from or writing to the TLB; it holds a comparison mask that sets the variable page size for each TLB entry, as shown in Table 4-9.

TLB read and write operations use this register as either a source or a destination; when virtual addresses are presented for translation into physical address, the corresponding bits in the TLB identify which virtual address bits among bits 24:13 are used in the comparison. When the Mask field is not one of the values shown in Table 4-9, the operation of the TLB is undefined.

Table 4-9 Mask Field Values for Page Sizes

Copyright 1996, MIPS Technologies, Inc. -- 21 MAR 96

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