ARM System Control Coprocessor (CP15). More...

#include <ARMControl.h>

Public Types
enum	Register { MainID = 0, CoreID, SystemControl, AuxControl, DomainControl, TranslationTable0, TranslationTable1, TranslationTableCtrl, CacheClear, DataCacheClean, FlushPrefetchBuffer, InstructionCacheClear, InstructionTLBClear, DataTLBClear, UnifiedTLBClear, UserProcID, InstructionFaultAddress, InstructionFaultStatus, DataFaultAddress, DataFaultStatus, SystemFrequency }
	System Control Registers. More...

enum	SystemControlFlags { MMUEnabled = (1 << 0), InstructionCache = (1 << 12), DataCache = (1 << 2), ExtendedPaging = (1 << 23), AccessPermissions = (1 << 29), BranchPrediction = (1 << 11), AlignmentCorrect = (1 << 22), AlignmentFaults = (1 << 1), BigEndian = (1 << 25) }
	System Control flags. More...

enum	AuxControlFlags { DisablePageColoring = (1 << 6), SMPBit = (1 << 6) }
	Aux Control flags. More...

enum	DomainControlFlags { DomainClient = 1, DomainManager = 3 }
	Domain Control flags. More...

Public Member Functions
	ARMControl ()
	Constructor. More...

virtual	~ARMControl ()
	Destructor. More...

u32	read (Register reg) const
	Read a register from the CP15. More...

void	write (Register reg, u32 value)
	Write register to the CP15. More...

void	set (SystemControlFlags flags)
	Set system control flags in CP15. More...

void	unset (SystemControlFlags flags)
	Unset system control flags in CP15. More...

void	set (AuxControlFlags flags)
	Set auxillary flags in CP15. More...

void	set (DomainControlFlags flags)
	Set domain control flags in CP15. More...

Private Member Functions
void	set (Register reg, u32 flags)
	Set flag(s) in a CP15 register. More...

void	unset (Register reg, u32 flags)
	Unset flag(s) in a CP15 register. More...

Detailed Description

ARM System Control Coprocessor (CP15).

The ARM Architecture defines a coprocessor to manage various subsystems in the ARM core, including virtual memory, interrupts, debugging and more. It appears as coprocessor number 15 to the ARM core and is accessible by the MRC (ARM Register from Coprocessor) and MCR () instructions.

See also: ARM Architecture Reference Manual, page xxx

Definition at line 47 of file ARMControl.h.

Member Enumeration Documentation

◆ AuxControlFlags

enum ARMControl::AuxControlFlags

Aux Control flags.

Enumerator
DisablePageColoring
SMPBit

Definition at line 102 of file ARMControl.h.

◆ DomainControlFlags

enum ARMControl::DomainControlFlags

Domain Control flags.

Enumerator
DomainClient
DomainManager

Definition at line 111 of file ARMControl.h.

◆ Register

enum ARMControl::Register

System Control Registers.

Enumerator
MainID
CoreID
SystemControl
AuxControl
DomainControl
TranslationTable0
TranslationTable1
TranslationTableCtrl
CacheClear
DataCacheClean
FlushPrefetchBuffer
InstructionCacheClear
InstructionTLBClear
DataTLBClear
UnifiedTLBClear
UserProcID
InstructionFaultAddress
InstructionFaultStatus
DataFaultAddress
DataFaultStatus
SystemFrequency

Definition at line 54 of file ARMControl.h.

◆ SystemControlFlags

enum ARMControl::SystemControlFlags

System Control flags.

Enumerator
MMUEnabled
InstructionCache
DataCache
ExtendedPaging
AccessPermissions
BranchPrediction
AlignmentCorrect
AlignmentFaults
BigEndian

Definition at line 82 of file ARMControl.h.

Constructor & Destructor Documentation

◆ ARMControl()

ARMControl::ARMControl ( )

Constructor.

Definition at line 21 of file ARMControl.cpp.

◆ ~ARMControl()

ARMControl::~ARMControl ( )

virtual

Destructor.

Definition at line 25 of file ARMControl.cpp.

Member Function Documentation

◆ read()

u32 ARMControl::read ( Register reg ) const

Read a register from the CP15.

Parameters

reg	The Register to read.

Returns: 32-bit value of the register.

Definition at line 29 of file ARMControl.cpp.

References AuxControl, CoreID, DataFaultAddress, DataFaultStatus, DomainControl, InstructionFaultAddress, InstructionFaultStatus, MainID, mrc, SystemControl, SystemFrequency, TranslationTable0, TranslationTable1, TranslationTableCtrl, and UserProcID.

Referenced by ARMCore::logState(), RaspberryKernel::RaspberryKernel(), set(), and unset().

◆ set() [1/4]

void ARMControl::set ( ARMControl::AuxControlFlags flags )

Set auxillary flags in CP15.

Parameters

flags Auxillary flags to set

Definition at line 98 of file ARMControl.cpp.

References AuxControl, flags, and set().

◆ set() [2/4]

void ARMControl::set ( ARMControl::DomainControlFlags flags )

Set domain control flags in CP15.

Parameters

flags New domain control flags

Definition at line 103 of file ARMControl.cpp.

References DomainControl, flags, and set().

◆ set() [3/4]

void ARMControl::set	(	Register	reg,
		u32	flags
	)

private

Set flag(s) in a CP15 register.

Parameters

reg	Register to set
flags	Flag values to set in the register

Definition at line 74 of file ARMControl.cpp.

References flags, read(), and write().

◆ set() [4/4]

void ARMControl::set ( ARMControl::SystemControlFlags flags )

Set system control flags in CP15.

Parameters

flags New system control flags

Definition at line 88 of file ARMControl.cpp.

References flags, and SystemControl.

Referenced by ARMKernel::ARMKernel(), kernel_main(), and set().

◆ unset() [1/2]

void ARMControl::unset	(	Register	reg,
		u32	flags
	)

private

Unset flag(s) in a CP15 register.

Parameters

reg	Register to unset
flags	Flag values to remove from the register

Definition at line 81 of file ARMControl.cpp.

References flags, read(), and write().

◆ unset() [2/2]

void ARMControl::unset ( ARMControl::SystemControlFlags flags )

Unset system control flags in CP15.

Parameters

flags System control flags to remove

Definition at line 93 of file ARMControl.cpp.

References flags, and SystemControl.

Referenced by ARMKernel::ARMKernel().

◆ write()

void ARMControl::write	(	Register	reg,
		u32	value
	)

Write register to the CP15.

Parameters

reg	The Register to write.
value	32-value to write.

Definition at line 52 of file ARMControl.cpp.

References AuxControl, CacheClear, DataCacheClean, DataTLBClear, DomainControl, FlushPrefetchBuffer, flushPrefetchBuffer(), InstructionCacheClear, InstructionTLBClear, mcr, SystemControl, TranslationTable0, TranslationTable1, TranslationTableCtrl, UnifiedTLBClear, and UserProcID.

Referenced by ARMPaging::activate(), set(), and unset().

The documentation for this class was generated from the following files:

lib/libarch/arm/ARMControl.h
lib/libarch/arm/ARMControl.cpp

Public Types

Public Member Functions

Private Member Functions

Detailed Description

Member Enumeration Documentation

◆ AuxControlFlags

◆ DomainControlFlags

◆ Register

◆ SystemControlFlags

Constructor & Destructor Documentation

◆ ARMControl()

◆ ~ARMControl()

Member Function Documentation

◆ read()

◆ set() [1/4]

◆ set() [2/4]

◆ set() [3/4]

◆ set() [4/4]

◆ unset() [1/2]

◆ unset() [2/2]

◆ write()