IPR-NIOS Altera, IPR-NIOS Datasheet - Page 78

• Manufacturer Part Number: IPR-NIOS
• Description: IP NIOS II MEGACORE RENEW
• Manufacturer: Altera
• Type: MegaCorer

Specifications of IPR-NIOS

• License: Renewal License
• Lead Free Status / RoHS Status: Not applicable / Not applicable

3–32
Table 3–33. Nios II Exceptions (In Decreasing Priority Order) (Part 1 of 2)
Nios II Processor Reference Handbook
Reset
Hardware Break
Processor-only Reset
Request
Internal Interrupt
External nonmaskable
interrupt
External maskable interrupt
Supervisor-only Instruction
Address
Fast TLB Miss
(instruction)
Double TLB Miss
(instruction)
TLB Permission Violation
(execute)
MPU Region Violation
(instruction)
Supervisor-only Instruction
Trap Instruction
Illegal Instruction
Unimplemented Instruction
Break Instruction
Exception
(1)
(1)
(1)
(1)
(1)
Table 3–33
The following table columns specify information for the exceptions:
■
■
■
■
■
■
Exception—Gives the name of the exception.
Type—Specifies the exception type.
Available—Specifies when support for that exception is present.
Cause—Specifies the value of the CAUSE field of the exception register, for
exceptions that write the exception.CAUSE field.
Address—Specifies the instruction or data address associated with the exception.
Vector—Specifies which exception vector address the processor passes control to
when the exception occurs.
Reset
Break
Reset
Interrupt
Interrupt
Interrupt
Instruction-related
Instruction-related
Instruction-related
Instruction-related
Instruction-related
Instruction-related
Instruction-related
Instruction-related
Instruction-related
Instruction-related
shows all possible Nios II exceptions in order of highest to lowest priority.
Type
Always
Always
Always
Internal
interrupt
controller
External
interrupt
controller
interface
External
interrupt
controller
interface
MMU
MMU
MMU
MMU
MPU
MMU or MPU
Always
Illegal
instruction
detection on,
MMU, or MPU
Always
Always
Available
0
—
1
2
—
2
9
12
12
13
16
10
3
5
4
—
Cause
ea–4
ea–4
ea–4
ea–4
pteaddr.VPN,
ea–4
pteaddr.VPN,
ea–4
pteaddr.VPN,
ea–4
ea–4
ea–4
ea–4
ea–4
ea–4
ba–4
Address
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
December 2010 Altera Corporation
Chapter 3: Programming Model
Reset
Break
Reset
General exception
Requested handler
address
Requested handler
address
General exception
Fast TLB Miss
exception
General exception
General exception
General exception
General exception
General exception
General exception
General exception
Break
Exception Processing
Vector
(3)
(3)