ARM R4F, r1p3 System control and configuration, TCM control TCM Status, Configuration Region

System Control Coprocessor

Table 4-1 System control coprocessor register functions (continued)

Function	Register/operation	Reference to description
TCM control and	TCM Status	c0, TCM Type Register on page 4-16
configuration
	Region	c9, BTCM Region Register on page 4-57
		c9, TCM Selection Register on page 4-59
System performance	Performance monitoring	Chapter 6 Events and Performance Monitor
monitoring
Validation	System validation	Validation Registers on page 4-62

a.Known as the ID Code Register on previous designs. Returns the device ID code.

4.1.2System control and configuration

The system control and configuration registers provide overall management of:

•memory functionality

•interrupt behavior

•exception handling

•program flow prediction

•coprocessor access rights for CP0-CP13, including the VFP, CP10-11.

The system control and configuration registers also provide the processor ID and information on configured options.

The system control and configuration registers consist of 18 read-only registers and seven read/write registers. Figure 4-1shows the arrangement of registers in this functional group.

CRn Opcode_1

c0 0

c1	0
c11
	0
c13
	0
c15	0

CRm		Opcode_2
							Main ID Register
	c0				0
							Multiprocessor ID Register
					5
							Processor Feature Registers 0, 1
	c1		{0, 1}
							Debug Feature Register 0
					2
							Auxiliary Feature Register 0
					3
							Memory Model Feature Registers 0 - 3
			{4–7}
							Instruction Set Attributes Registers 0 - 5
	c2			{0-5}
							System Control Register
	c0				0
							Auxiliary Control Register
					1
							Coprocessor Access Register
					2
							Slave Port Control Register
	c0				0
							FCSE PID Register
	c0				0
							Context ID Register
					1
							Secondary Auxiliary Control Register
	c0				0
							Build Options Register 1
	c2					0
					1		Build Options Register 2

Read-only Read/write Write-only Accessible in User mode

Figure 4-1 System control and configuration registers

Some of the functionality depends on how you set external signals at reset.

System control and configuration behaves in three ways:

•as a set of flags or enables for specific functionality

•as a set of numbers, with values that indicate system functionality

•as a set of addresses for processes in memory.

ARM DDI 0363E	Copyright © 2009 ARM Limited. All rights reserved.	4-4
ID013010	Non-Confidential, Unrestricted Access