Mpu_Mair1; Memory Attribute Indirection Register Attributes (Mair_Attr) - Realtek Ameba-D RTL872 D Series User Manual

15:8 ATTR3
7:0 ATTR0

3.2.9 MPU_MAIR1

The MPU_MAIR1 characteristics are:

Purpose: Along with MPU_MAIR0, provides the memory attribute encoding corresponding to the AttrIndx values.

Usage constraints:

Privileged access is permitted only. Unprivileged access generates a BusFault.

This register is word accessible only. Half-word and byte accesses are unpredictable.

Configurations: This register is always implemented.

Attributes:

32-bit read/write register located at 0xE000_EDC4.

Secure software can access the Non-Secure view of this register via MPU_MAIR1_NS located at 0xE002_EDC4. The location
0xE002_EDC4 is reserved to software executing in Non-Secure state and the debugger.

This register is banked between security states.

Preface: This register is reserved if no MPU regions are implemented in the corresponding security state.
31 30
23 22
15 14
7 6
Bit Name
31:24 ATTR7
23:16 ATTR6
15:8 ATTR5
7:0 ATTR4
3.3

Memory Attribute Indirection Register Attributes (MAIR_ATTR)

The MAIR_ATTR characteristics are:

Purpose: Defines the memory attribute encoding for use in the MPU_MAIR0 and MPU_MAIR1 register.

Usage constraints: None.

Configurations: All.
User Manual
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
R/W Memory attributes encoding for MPU regions with an AttrIndx of 1.
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
R/W Memory attributes encoding for MPU regions with an AttrIndx of 0.
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
29
21
13
5
Access Description
R/W Memory attributes encoding for MPU regions with an AttrIndx of 7.
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
R/W Memory attributes encoding for MPU regions with an AttrIndx of 6.
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
R/W Memory attributes encoding for MPU regions with an AttrIndx of 5.
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
R/W Memory attributes encoding for MPU regions with an AttrIndx of 4.
For the possible values of this field, refer to MAIR_ATTR for encoding.
This field resets to an unknown value on a Warm reset.
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28 27
ATTR7
R/W
20 19
ATTR6
R/W
12 11
ATTR5
R/W
4 3
ATTR4
R/W
34
Ameba-D User Manual
26 25
18 17
10 9
2 1
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24
16
8
0