UM0434 datasheet(59/390 Pages) STMICROELECTRONICS

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UM0434

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protection violation exception and a byte-ordering exception. System software must check

beyond ESR[BO], such as the state of MSR[PR] in SRR1 and the TLB entry page protection

bits, to determine whether a protection violation also occurred.

The ESR fields are described in

Table 34.

4.9.1

VLE mode instruction syndrome

ESR[VLEMI] indicates when an interrupt is caused by a VLE instruction. This syndrome bit

is set on an exception associated with execution or attempted execution of a VLE

instruction. This bit is updated for the interrupt types in

Table 34.

ESR field descriptions

Bits

Name

Description

Associated interrupt type

32–35

—

Reserved, should be cleared.

—

PIL

Illegal instruction exception

Program

PPR

Privileged instruction exception

Program

PTR

Trap exception

Program

Floating-point operation

Alignment, data storage, data TLB, program

Store operation

Alignment, data storage, data TLB

—

Reserved, should be cleared.

—

DLK

Data cache locking(1)

Data storage

ILK

Instruction cache locking

Data storage`

Auxiliary processor operation. (unused in the

e200z3)

Alignment, data storage, data TLB, program

PUO

Unimplemented operation exception

Program

Byte ordering exception

Data storage

PIE

Program imprecise exception. Unused in the

e200z3 (Reserved, should be cleared.)

—

48–55

—

Reserved, should be cleared.

—

SPE

SPE APU operation

SPE unavailable, SPE floating-point data

exception, SPE floating-point round exception,

alignment, data storage, data TLB

—

Reserved, should be cleared.

—

VLEM

VLE mode instruction

SPE unavailable, SPE floating-point data

exception, SPE floating-point round exception,

data storage, data TLB, instruction storage,

alignment, program, and system call

59–61

—

Reserved, should be cleared.

—

MIF

Misaligned instruction fetch

Instruction storage, instruction TLB

XTE

External termination error (precise)

Data storage, instruction storage

When optional cache is present. Unused on e200z3.

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