MAIR_EL2
64-bitMemory managementWhat the memory attributes in the page tables mean: eight 8-byte entries, each an index into this table. A descriptor's AttrIndx picks one of them, so this is what decides whether a page is Normal cacheable or Device memory.
Field layout
Attr7[63:56]63:56
Attr6[55:48]55:48
Attr5[47:40]47:40
Attr4[39:32]39:32
Attr3[31:24]31:24
Attr2[23:16]23:16
Attr1[15:8]15:8
Attr0[7:0]7:0
byte 7
byte 6
byte 5
byte 4
byte 3
byte 2
byte 1
byte 0
Current value hover a field to locate it
B7
B6
B5
B4
B3
B2
B1
B0
Fields
| Bits | Field | Bits | Value | Description |
|---|---|---|---|---|
| 63:56 | Attr7[63:56] | 8 | 0x0 (0) | Attribute index 7. |
| 55:48 | Attr6[55:48] | 8 | 0x0 (0) | Attribute index 6. |
| 47:40 | Attr5[47:40] | 8 | 0x0 (0) | Attribute index 5. |
| 39:32 | Attr4[39:32] | 8 | 0x0 (0) | Attribute index 4. |
| 31:24 | Attr3[31:24] | 8 | 0x0 (0) | Attribute index 3. |
| 23:16 | Attr2[23:16] | 8 | 0x0 (0) | Attribute index 2. |
| 15:8 | Attr1[15:8] | 8 | 0x0 (0) | Attribute index 1. |
| 7:0 | Attr0[7:0] | 8 | 0x0 (0) | Attribute index 0, the one every descriptor uses unless it says otherwise. |