sip

Supervisor Interrupt Pending

A restricted view of the interrupt pending bits in mip.

Hypervisor-related interrupts (VS-mode interrupts and Supervisor Guest interrupts) are not reflected in sip even though those interrupts can be taken in HS-mode. Instead, they are reported through hip.

Attributes

Defining Extension	S, version >= 0
CSR Address	0x144
Length	64-bit
Privilege Mode	S

Defining Extension

S, version >= 0

CSR Address

0x144

Length

64-bit

Privilege Mode

Format

Figure 1. sip format

Field Summary

Name Location Type Reset Value

Name	Location	Type	Reset Value
`SSIP`	1	RW	UNDEFINED_LEGAL
`STIP`	5	RO-H	UNDEFINED_LEGAL
`SEIP`	9	RO-H	UNDEFINED_LEGAL
`LCOFIP`	13	RW-H	UNDEFINED_LEGAL

SSIP

UNDEFINED_LEGAL

STIP

RO-H

UNDEFINED_LEGAL

SEIP

RO-H

UNDEFINED_LEGAL

LCOFIP

RW-H

UNDEFINED_LEGAL

Fields

`SSIP`

Location

Description

Supervisor Software Interrupt Pending

Reports the current pending state of an (H)S-mode software interrupt.

When Supervisor Software Interrupts are not delegated to (H)S-mode (mideleg.SSI is clear), sip.SSIP is read-only 0.

Otherwise, sip.SSIP is an alias of mip.SSIP.

Since it is an alias, writes to sip.SSIP are also be reflected in mip.SSIP.

Alias:

mip.SSIP when mideleg.SSI is set

To summarize:
[separator="!",%autowidth]
!===
! mideleg.SSI ! sip.SSIP behavior

! 0 ! read-only 0
! 1 ! writeable alias of mip.SSIP
!===

Type

Reset value

UNDEFINED_LEGAL

`STIP`

Location

Description

Supervisor Timer Interrupt Pending

Reports the current pending state of an (H)S-mode timer interrupt.

When Supervisor Timer Interrupts are not delegated to (H)S-mode (i.e., mideleg.STI is clear), sip.STIP is read-only 0.

Otherwise, sip.STIP is a read-only view of mip.STIP.

Alias:

mip.STIP when mideleg.STI is set

To summarize:
[separator="!",%autowidth]
!===
! mideleg.STI ! sip.STIP behavior

! 0 ! read-only 0
! 1 ! read-only alias of mip.STIP
!===

Type

RO-H

Reset value

UNDEFINED_LEGAL

`SEIP`

Location: 9
Description: Supervisor External Interrupt Pending

Reports the current pending state of an (H)S-mode external interrupt.

When Supervisor External Interrupts are not delegated to (H)S-mode (i.e., mideleg.SEI is clear), sip.SEIP is read-only 0.

Otherwise, sip.SEIP is a read-only view of mip.SEIP.

To summarize:
[separator="!",%autowidth]
!===
! mideleg.SEI ! sip.SEIP behavior

! 0 ! read-only 0
! 1 ! read-only alias of mip.SEIP
!===
Type: RO-H
Reset value: UNDEFINED_LEGAL

`LCOFIP`

Location: 13
Description: Local Counter Overflow Interrupt pending

Reports the current pending state of a Local Counter Overflow interrupt.

When Local Counter Overflow interrupts are not delegated to (H)S-mode (i.e., mideleg.LCOFI is clear), sip.LCOFIP is read-only 0.

Otherwise, sip.LCOFIP is an alias of mip.LCOFIP.

Software writes 0 to sip.LCOFIP to clear the pending interrupt.

To summarize:
[separator="!",%autowidth]
!===
! mideleg.LCOFI ! sip.LCOFIP behavior

! 0 ! read-only 0
! 1
a! writeable alias of mip.LCOFIP (and vsip.LCOFIP when hideleg.LCOFI is set)
!===
Type: RW-H
Reset value: UNDEFINED_LEGAL