CFlash Class Reference

#include <Flash.h>

Inheritance diagram for CFlash:

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Collaboration diagram for CFlash:

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Detailed Description

Emulated flash memory.

Flash memory is only used for storing configuration data (such as SRM console variables), it is not used for firmware.

Definition at line 79 of file Flash.h.


Public Member Functions
virtual void	WriteMem (int index, u64 address, int dsize, u64 data)
	Write command or programming data to flash-rom.
virtual u64	ReadMem (int index, u64 address, int dsize)
	Read a byte from flashmemory.
	CFlash (CConfigurator cfg, class CSystem c)
	Constructor.
virtual	~CFlash ()
	Destructor.
virtual int	SaveState (FILE *f)
	Save state to a Virtual Machine State file.
virtual int	RestoreState (FILE *f)
	Restore state from a Virtual Machine State file.
void	SaveStateF ()
	Save state to the default flash rom file.
void	RestoreStateF ()
	Restore state from the default flash rom file.
void	SaveStateF (char *fn)
	Save state to a flash rom file.
void	RestoreStateF (char *fn)
	Restore state from a flash rom file.
Protected Attributes
struct CFlash::SFlash_state	state
Data Structures
struct	SFlash_state
	The state structure contains all elements that need to be saved to the statefile. More...

Constructor & Destructor Documentation

CFlash::CFlash	(	CConfigurator *	cfg,
		class CSystem *	c
	)

Constructor.

Definition at line 114 of file Flash.cpp.

References CSystemComponent::devid_string, FAILURE, CFlash::SFlash_state::Flash, CFlash::SFlash_state::mode, MODE_READ, CSystem::RegisterMemory(), RestoreStateF(), state, theSROM, and U64.

CFlash::~CFlash ( ) [virtual]

Destructor.

Definition at line 131 of file Flash.cpp.

Member Function Documentation

void CFlash::WriteMem	(	int	index,
		u64	address,
		int	dsize,
		u64	data
	)			`[virtual]`

Write command or programming data to flash-rom.

The state machine for this looks like this:

         |
         v
     MODE_READ <---------------------------+
         | write 0x5555:0xaa               |
         v                                 |
     MODE_STEP1 ---------------------------+
         | write 0x2aaa:0x55               |
         v                                 |
     ==MODE_STEP2= ------------------------+
 0x80| 0xa0| 0x90| write 0x5555            | 
     |     |     v                         |
     |     | MODE_AUTOSEL (read device id)-+
     |     v                               |
     | MODE_PROGRAM                        |
     |     | write data byte               |
     |     +-------------------------------+
     v                                     |
  MODE_ERASE_STEP3 ------------------------+
     | write 0x5555:0xaa                   |
     v                                     |
  MODE_ERASE_STEP4 ------------------------+
     | write 0x2aaa:0x55                   |
     v                                     |
  MODE_ERASE_STEP4 ------------------------+
   | write 0x30  | write 0x5555:0x10       |
   | anywhere    v                         |
   v           ERASE ENTIRE FLASH          |
 ERASE BLOCK     |                         |
       |         |                         |
       v         v                         |
      MODE_CONFIRM1                        |
          | read 0x80                      |
          v                                |
      MODE_CONFIRM2                        |
          | read 0x80                      |
          +--------------------------------+

Reimplemented from CSystemComponent.

Definition at line 217 of file Flash.cpp.

References CFlash::SFlash_state::Flash, CFlash::SFlash_state::mode, MODE_AUTOSEL, MODE_CONFIRM_1, MODE_ERASE_STEP3, MODE_ERASE_STEP4, MODE_ERASE_STEP5, MODE_PROGRAM, MODE_READ, MODE_STEP1, MODE_STEP2, and state.