Xilinx Virtex-II Pro PPC405, Руководство пользователя

Страница: 465 / 562

March 2002 Release www.xilinx.com 773
Virtex-II Pro™ Platform FPGA Documentation 1-800-255-7778
Special-Purpose Registers
R
Table A-6 lists the special-purpose registers sorted by SPRF. The SPRF is the split-field
version of the SPRN that appears in the instruction encoding. This table is useful in
interpreting machine-code listings.
EVPR Exception-Vector Prefix Register 982 0x3D6 0x2DE 0b10110_11110 Yes Read/Write Undefined
TSR Timer-Status Register 984 0x3D8 0x31E 0b11000_11110 Yes Read/Clear Undefined
1
TCR Timer-Control Register 986 0x3DA 0x35E 0b11010_11110 Yes Read/Write Undefined
2
PIT Programmable-Interval Timer 987 0x3DB 0x37E 0b11011_11110 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
DBSR Debug-Status Register 1008 0x3F0 0x21F 0b10000_11111 Yes Read/Clear Undefined
1
DBCR0 Debug-Control Register 0 1010 0x3F2 0x25F 0b10010_11111 Yes Read/Write 0x0000_0000
IAC1 Instruction Address-Compare 1 1012 0x3F4 0x29F 0b10100_11111 Yes Read/Write Undefined
IAC2 Instruction Address-Compare 2 1013 0x3F5 0x2B5 0b10101_11111 Yes Read/Write Undefined
DAC1 Data Address-Compare 1 1014 0x3F6 0x2DF 0b10110_11111 Yes Read/Write Undefined
DAC2 Data Address-Compare 2 1015 0x3F7 0x2FF 0b10111_11111 Yes Read/Write Undefined
DCCR Data-Cache Cacheability Register 1018 0x3FA 0x35F 0b11010_11111 Yes Read/Write 0x0000_0000
ICCR Instruction-Cache Cacheability
Register 1019 0x3FB 0x37F 0b11011_11111 Yes Read/Write 0x0000_0000
Table A-5: Special-Purpose Registers Sorted by SPRN (Continued)
Name Descriptive Name
SPRN SPRF
Privileged Access Reset Value
Dec Hex Hex Binary
Table A-6: Special-Purpose Registers Sorted by SPRF
Name Descriptive Name
SPRN SPRF
Privileged Access Reset Value
Dec Hex Hex Binary
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
SPRG4 SPR General-Purpose Register 4 260 0x104 0x088 0b00100_01000 No Read-Only Undefined
SPRG5 SPR General-Purpose Register 5 261 0x105 0x0A8 0b00101_01000 No Read-Only Undefined
SPRG6 SPR General-Purpose Register 6 262 0x106 0x0C8 0b00110_01000 No Read-Only Undefined
SPRG7 SPR General-Purpose Register 7 263 0x107 0x0E8 0b00111_01000 No Read-Only Undefined
LR Link Register 8 0x008 0x100 0b01000_00000 No Read/Write Undefined
CTR Count Register 9 0x009 0x120 0b01001_00000 No Read/Write Undefined
SPRG0 SPR General-Purpose Register 0 272 0x110 0x208 0b10000_01000 Yes Read/Write Undefined
ZPR Zone-Protection Register 944 0x3B0 0x21D 0b10000_11101 Yes Read/Write Undefined
DBSR Debug-Status Register 1008 0x3F0 0x21F 0b10000_11111 Yes Read/Clear Undefined
1
SPRG1 SPR General-Purpose Register 1 273 0x111 0x228 0b10001_01000 Yes Read/Write Undefined
PID Process ID Register 945 0x3B1 0x23D 0b10001_11101 Yes Read/Write Undefined
SPRG2 SPR General-Purpose Register 2 274 0x112 0x248 0b10010_01000 Yes Read/Write Undefined
DBCR0 Debug-Control Register 0 1010 0x3F2 0x25F 0b10010_11111 Yes Read/Write 0x0000_0000
SPRG3 SPR General-Purpose Register 3 275 0x113 0x268 0b10011_01000 Yes Read/Write Undefined