TMPR4956C datasheet(74/286 Pages) TOSHIBA

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Chapter 3 TX49/H4 Core’s Registers

3-14

Bit(s)

Field Name

Description

Cold Reset

Read/Write

Reserved

Read

1: Indicates a soft reset or NMI has occurred.

Read/Write

Reserved

Read

“Hit” or “miss” indication for last CACHE Hit Invalidate, Hit

Write Back Invalidate, Hit Write Back for a primary cache.

0: miss

1: hit

Read/Write

17:16

Reserved

0x0

Read

15:8

Interrupt Mask

Controls the enabling of each of the external, internal and

software interrupts. An interrupt is taken if interrupts are

enabled, and the corresponding bits are set in both the IM field

of the Status register and the IP field of the Cause register.

0: disabled

1: enabled

0x0

Read/Write

Enables 64-bit addressing in Kernel mode. The

extended-addressing TLB refill exception is used for TLB

misses on kernel addresses.

0: 32-bit

1: 64-bit

Read/Write

Enables 64-bit addressing and operations in Supervisor

mode. The extended-addressing TLB refill exception is used

for TLB misses on supervisor addresses.

0: 32-bit

1: 64-bit

Read/Write

Enables 64-bit addressing and operations in User mode. The

extended-addressing TLB refill exception is used for TLB

misses on user addresses.

0: 32-bit

1: 64-bit

Read/Write

4:3

KSU

Mode

10: user

01: supervisor

00: kernel

11: reserved

0x0

Read/Write

ERL

Error Level

0: normal

1: error

Read/Write

EXL

Exception Level

0: normal

1: exception

Read/Write

Interrupt Enable

0: disable

1: enable

Read/Write

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