Xilinx Virtex-II Pro PPC405, User Manual

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March 2002 Release www.xilinx.com 771
Virtex-II Pro™ Platform FPGA Documentation 1-800-255-7778
Special-Purpose Registers
R
Table A-5 lists the special-purpose registers sorted by the SPRN. The SPRN is the SPR
number that appears in the assembler syntax. This table is useful in interpreting assembler
listings.
IAC3 Instruction Address-Compare 3 948 0x3B4 0x29D 0b10100_11101 Yes Read/Write Undefined
IAC4 Instruction Address-Compare 4 949 0x3B5 0x2BD 0b10101_11101 Yes Read/Write Undefined
ICCR Instruction-Cache Cacheability
Register 1019 0x3FB 0x37F 0b11011_11111 Yes Read/Write 0x0000_0000
ICDBDR Instruction-Cache Debug-Data Register 979 0x3D3 0x27E 0b10011_11110 Yes Read-Only Undefined
LR Link Register 8 0x008 0x100 0b01000_00000 No Read/Write Undefined
PID Process ID Register 945 0x3B1 0x23D 0b10001_11101 Yes Read/Write Undefined
PIT Programmable-Interval Timer 987 0x3DB 0x37E 0b11011_11110 Yes Read/Write Undefined
PVR Processor-Version Register 287 0x11F 0x3E8 0b11111_01000 Yes Read-Only 0x2001_0820
SGR Storage Guarded Register 953 0x3B9 0x33D 0b11001_11101 Yes Read/Write 0xFFFF_FFFF
SLER Storage Little-Endian Register 955 0x3BB 0x37D 0b11011_11101 Yes Read/Write 0x0000_0000
SPRG0 SPR General-Purpose Register 0 272 0x110 0x208 0b10000_01000 Yes Read/Write Undefined
SPRG1 SPR General-Purpose Register 1 273 0x111 0x228 0b10001_01000 Yes Read/Write Undefined
SPRG2 SPR General-Purpose Register 2 274 0x112 0x248 0b10010_01000 Yes Read/Write Undefined
SPRG3 SPR General-Purpose Register 3 275 0x113 0x268 0b10011_01000 Yes Read/Write Undefined
SPRG4 SPR General-Purpose Register 4 260 0x104 0x088 0b00100_01000 No Read-Only Undefined
SPRG4 SPR General-Purpose Register 4 276 0x114 0x288 0b10100_01000 Yes Read/Write Undefined
SPRG5 SPR General-Purpose Register 5 261 0x105 0x0A8 0b00101_01000 No Read-Only Undefined
SPRG5 SPR General-Purpose Register 5 277 0x115 0x2A8 0b10101_01000 Yes Read/Write Undefined
SPRG6 SPR General-Purpose Register 6 262 0x106 0x0C8 0b00110_01000 No Read-Only Undefined
SPRG6 SPR General-Purpose Register 6 278 0x116 0x2C8 0b10110_01000 Yes Read/Write Undefined
SPRG7 SPR General-Purpose Register 7 263 0x107 0x0E8 0b00111_01000 No Read-Only Undefined
SPRG7 SPR General-Purpose Register 7 279 0x117 0x2E8 0b10111_01000 Yes Read/Write Undefined
SRR0 Save/Restore Register 0 26 0x01A 0x340 0b11010_00000 Yes Read/Write Undefined
SRR1 Save/Restore Register 1 27 0x01B 0x360 0b11011_00000 Yes Read/Write Undefined
SRR2 Save/Restore Register 2 990 0x3DE 0x3DE 0b11110_11110 Yes Read/Write Undefined
SRR3 Save/Restore Register 3 991 0x3DF 0x3FE 0b11111_11110 Yes Read/Write Undefined
SU0R Storage User-Defined 0 Register 956 0x3BC 0x39D 0b11100_11101 Yes Read/Write 0x0000_0000
TBL Time-Base Lower 284 0x11C 0x388 0b11100_01000 Yes Write-Only Undefined
TBU Time-Base Upper 285 0x11D 0x3A8 0b11101_01000 Yes Write-Only Undefined
TCR Timer-Control Register 986 0x3DA 0x35E 0b11010_11110 Yes Read/Write Undefined
2
TSR Timer-Status Register 984 0x3D8 0x31E 0b11000_11110 Yes Read/Clear Undefined
1
USPRG0 User SPR General-Purpose Register 0 256 0x100 0x008 0b00000_01000 No Read/Write Undefined
XER Fixed-Point Exception Register 1 0x001 0x020 0b00001_00000 No Read/Write Undefined
ZPR Zone-Protection Register 944 0x3B0 0x21D 0b10000_11101 Yes Read/Write Undefined
Table A-4: Special-Purpose Registers Sorted by Name (Continued)
Name Descriptive Name
SPRN SPRF
Privileged Access Reset Value
Dec Hex Hex Binary