Freescale Semiconductor PowerPC e500 Core - Page 158

PowerPC e500 Core Family Reference Manual, Rev. 1
3-28 Freescale Semiconductor
Instruction Model
SPRG0 SPR general 0 272 01000 10000 Read/Write Yes 2.8/2-24
SPRG1 SPR general 1 273 01000 10001 Read/Write Yes 2.8/2-24
SPRG2 SPR general 2 274 01000 10010 Read/Write Yes 2.8/2-24
SPRG3 SPR general 3 259 01000 00011 Read only No
3
2.8/2-24
275 01000 10011 Read/Write Yes 2.8/2-24
SPRG4 SPR general 4 260 01000 00100 Read only No 2.8/2-24
276 01000 10100 Read/Write Yes 2.8/2-24
SPRG5 SPR general 5 261 01000 00101 Read only No 2.8/2-24
277 01000 10101 Read/Write Yes 2.8/2-24
SPRG6 SPR general 6 262 01000 00110 Read only No 2.8/2-24
278 01000 10110 Read/Write Yes 2.8/2-24
SPRG7 SPR general 7 263 01000 00111 Read only No 2.8/2-24
279 01000 10111 Read/Write Yes 2.8/2-24
SRR0 Save/restore register 0 26 00000 11010 Read/Write Yes 2.7.1.1/2-18
SRR1 Save/restore register 1 27 00000 11011 Read/Write Yes 2.7.1.1/2-18
TBL Time base lower 268 01000 01100 Read only No 2.6.3/2-16
284 01000 11100 Write-only Yes 2.6.3/2-16
TBU Time base upper 269 01000 01101 Read only No 2.6.3/2-16
285 01000 11101 Write-only Yes 2.6.3/2-16
TCR Timer control register 340 01010 10100 Read/Write Yes 2.6.1/2-15
TSR Timer status register 336 01010 10000 Read/Clear
4
Ye s 2.6.2/2-16
USPRG0 User SPR general 0
5
256 01000 00000 Read/Write No 2.8/2-24
XER Integer exception register 1 00000 00001 Read/Write No 2.3.2/2-9
1
The DBSR is read using mfspr. It cannot be directly written to. Instead, DBSR bits corresponding to 1 bits in the GPR
can be cleared using mtspr.
2
Implementations may support more than one PID. The e500 implements the Book E–defined PID as PID0.
3
User-mode read access to SPRG3 is implementation-dependent.
4
The TSR is read using mfspr. It cannot be directly written to. Instead, TSR bits corresponding to 1 bits in the GPR can
be cleared using mtspr.
5
USPRG0 is a separate physical register from SPRG0.
Table 3-23. Book E Special-Purpose Registers (by SPR Abbreviation) (continued)
SPR
Abbreviation
Name
Defined SPR Number
Access
Supervisor
Only
Section/
Page
Decimal Binary