Software Debug Registers; Accessing The Debug Registers; Pwrmode Register; Clock And Power Management - Intel IXP45X Developer's Manual

Intel
Table 31.

PWRMODE Register

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
reset value: writable bits set to 0
Bits
31:0
1:0
The Intel XScale processor clock frequency cannot be changed by software on the
IXP45X/IXP46X network processors.
Table 32.

Clock and Power Management

Table 33.

CCLKCFG Register

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
reset value: unpredictable
Bits
31:0
3.5.2.3

Software Debug Registers

Software debug is supported by address breakpoint registers (Coprocessor 15,
register 14), serial communication over the JTAG interface and a trace buffer.
Registers 8 and 9 are used for the serial interface and registers 10 through 13 support
a 256 entry trace buffer. Register 14 and 15 are the debug link register and debug
SPSR (saved program status register). These registers are explained in more detail in
"Software Debug" on page
Opcode_2 and CRm should be zero.
Table 34. Accessing the Debug Registers (Sheet 1 of 2)
Access Transmit Debug Register (TX)
Access Receive Debug Register (RX)
Access Debug Control and Status Register
(DBGCSR)
Access Trace Buffer Register (TBREG)
® ®
Intel IXP45X and Intel IXP46X Product Line of Network Processors
Developer's Manual
110
® ®
IXP45X and Intel IXP46X Product Line of Network Processors—Intel XScale
Access
Read-unpredictable / Write-as-Zero
Read / Write
Function
Read CCLKCFG
Write CCLKCFG
Access
Read-unpredictable / Write-as-Zero
always
111.
Function
Description
Reserved
Mode (M)
0 = ACTIVE Never change from 00b
Data
ignored
CCLKCFG value
Description
Reserved (write as zero)
CRn (Register #)
0b1000
0b1001
0b1010
0b1011
®
Processor
8 7 6 5 4 3 2 1
M
Instruction
MRC p14, 0, Rd, c6, c0, 0
MCR p14, 0, Rd, c6, c0, 0
8 7 6 5 4 3 2 1
CCLKCFG
Instruction
MRC p14, 0, Rd, c8, c0, 0
MCR p14, 0, Rd, c8, c0, 0
MCR p14, 0, Rd, c9, c0, 0
MRC p14, 0, Rd, c9, c0, 0
MCR p14, 0, Rd, c10, c0, 0
MRC p14, 0, Rd, c10, c0, 0
MCR p14, 0, Rd, c11, c0, 0
MRC p14, 0, Rd, c11, c0, 0
August 2006
Order Number: 306262-004US
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