IPR-NIOS Altera, IPR-NIOS Datasheet - Page 92

• 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

3–46
Table 3–35. Nios II Processor Status After Taking Exception
Nios II Processor Reference Handbook
pteaddr.VPN
status.PRS
pc
sstatus
estatus
ea
tlbmisc.D
tlbmisc.DBL
tlbmisc.PERM
tlbmisc.BAD
status.PIE
status.EH
status.IH
status.NMI
status.IL
status.RSIE
status.CRS
status.U
(3) (21)
Processor Status
Register or Field
(10) (11)
(11)
(2)
(2)
(2)
(21)
(21)
(3)
(21)
(3)
(5)
(2)
(2)
(2)
Exceptions and Processor Status
Table 3–35
exception processing actions performed by hardware. For systems with an MMU,
status.EH indicates whether or not exception processing is already in progress. When
status.EH = 1, exception processing is already in progress and the states of the
exception registers are preserved to retain the original exception states.
RRS==0
status.EH==1
(3)
No change
No change
No change
External Interrupt Asserted
No change
RRS!=0
config.ANI
lists all changes to the Nios II processor state as a result of nonbreak
(2)
No change
RNMI
RHA
RRS
RIL
1
0
status.CRS
return address
RRS==0
status
No change
No change
No change
No change
No change
(7)
status.EH==0
(18)
System Status Before Taking Exception
status
(7) (12)
RRS!=0
(1)
(3) (7)
(13)
status.EH==1
Internal Interrupt Asserted or Noninterrupt Exception
No change
No change
vector
0
exception
General
(22)
(8)
TLB Miss
exception
Fast TLB
vector
(4)
(9)
No change
No change
No change
No change
No change
No change
No change
VPN
0
1
December 2010 Altera Corporation
(19)
(20)
Chapter 3: Programming Model
return address
Permission
status.EH==0
Violation
(6)
TLB
General exception
(4)
(14)
(15)
(16)
(17)
No TLB Miss
status
vector
Exception Processing
Permission
(3)
No change
Violation
(7)
No TLB