Nec Network Controller uPD98502 Manual de usuario Pagina 143

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CHAPTER 2 V
R
4120A
Preliminary User’s Manual S15543EJ1V0UM
143
Table 2-37. 32-Bit Mode Exception Vector Base Addresses
Vector Base Address (Virtual) Vector Offset
Cold Reset
Soft Reset
NMI
BFC0_0000H
(BEV bit is automatically set to 1)
0000H
TLB Refill (EXL = 0) 0000H
XTLB Refill (EXL = 0) 0080H
Other exceptions
8000_0000H (BEV = 0)
BFC0_0200H (BEV = 1)
0180H
(1) TLB refill exception vector
When BEV bit = 0, the vector base address (virtual) for the TLB Refill exception is in kseg0 (unmapped) space.
8000_0000H in 32-bit mode
FFFF_FFFF_8000_0000H in 64-bit mode
When BEV bit = 1, the vector base address (virtual) for the TLB Refill exception is in kseg1 (uncached, unmapped)
space.
BFC0_0200H in 32-bit mode
FFFF_FFFF_BFC0_0200H in 64-bit mode
This is an uncached, non-TLB-mapped space, allowing the exception handler to bypass the cache and TLB.
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