SP_EL3, Stack Pointer (EL3)

The SP_EL3 characteristics are:

Purpose

Holds the stack pointer associated with EL3. When executing at EL3, the value of SPSel.SP determines the current stack pointer:

SPSel.SP current stack pointer
0 SP_EL0
1 SP_EL3

This register is part of the Special-purpose registers functional group.

Usage constraints

This register is not accessible using MRS and MSR instructions.

When the value of SPSel.SP is 1, this register is accessible at EL3 as the current stack pointer.

Note

When the value of SPSel.SP is 0, SP_EL0 is used as the current stack pointer at all Exception levels.

Traps and Enables

There are no traps or enables affecting this register.

Configuration

There are no configuration notes.

Attributes

SP_EL3 is a 64-bit register.

Field descriptions

The SP_EL3 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
Stack pointer
Stack pointer
313029282726252423222120191817161514131211109876543210

Bits [63:0]

Stack pointer.




02/05/2017 15:43

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