Chapter 5
128 MIPS R4000 Microprocessor User's Manual
TLB Exceptions
Three types of TLB exceptions can occur:
• TLB Refill occurs when there is no TLB entry that matches an
attempted reference to a mapped address space.
• TLB Invalid occurs when a virtual address reference matches a
TLB entry that is marked invalid.
• TLB Modified occurs when a store operation virtual address
reference to memory matches a TLB entry which is marked
valid but is not dirty (the entry is not writable).
The following three sections describe these TLB exceptions.
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