Data in Huge Data Memory Space

Due to shortcomings of the GCC compiler for 8-bit AVR, custom functions are needed for access to data beyond the 64 kB boundary, i.e., addresses that are larger than 16-bit.

The definition of huge memory space can differ between architectures, so the implementation is architecture specific.

This module supplies functions for copying a number of bytes between huge and 64 kB data memory space, and is needed solely for code compatibility across compilers.

Modules
	Hugemem implementation for 8-bit AVR.
	Generic hugemem implementation.

Macros
#define	HUGEMEM_NULL   NULL
#define	HUGEMEM_NULL   0

Typedefs
typedef void *	hugemem_ptr_t
typedef uint32_t	hugemem_ptr_t
	Type to use for pointers to huge memory. More...

Functions
uint_fast16_t	hugemem_read16 (const hugemem_ptr_t from)
uint_fast32_t	hugemem_read32 (const hugemem_ptr_t from)
static uint_fast8_t	hugemem_read8 (const hugemem_ptr_t from)
void	hugemem_read_block (void *to, const hugemem_ptr_t from, size_t size)
static void	hugemem_write16 (hugemem_ptr_t to, uint16_t val)
void	hugemem_write16 (hugemem_ptr_t to, uint_fast16_t val)
	Write 16-bit value val to huge memory address to. More...
static void	hugemem_write32 (hugemem_ptr_t to, uint32_t val)
void	hugemem_write32 (hugemem_ptr_t to, uint_fast32_t val)
	Write 32-bit value val to huge memory address to. More...
static void	hugemem_write8 (hugemem_ptr_t to, uint8_t val)
static void	hugemem_write8 (hugemem_ptr_t to, uint_fast8_t val)
void	hugemem_write_block (hugemem_ptr_t to, const void *from, size_t size)

#define HUGEMEM_NULL   NULL

#define HUGEMEM_NULL   0

Referenced by run_dma_config_interface_test().

typedef void* hugemem_ptr_t

hugemem_ptr_t

Type to use for pointers to huge memory.

uint_fast16_t hugemem_read16

(

const hugemem_ptr_t

from

)

uint_fast32_t hugemem_read32

(

const hugemem_ptr_t

from

)

static uint_fast8_t hugemem_read8 ( const hugemem_ptr_t  from )

inlinestatic

Referenced by ebi_test_addr_bus(), and run_address_bus_test().

void hugemem_read_block	(	void *	to,
		const hugemem_ptr_t	from,
		size_t	size
	)

static void hugemem_write16 ( hugemem_ptr_t  to, uint16_t  val  )

inlinestatic

void hugemem_write16	(	hugemem_ptr_t	to,
		uint_fast16_t	val
	)

Write 16-bit value val to huge memory address to.

static void hugemem_write32 ( hugemem_ptr_t  to, uint32_t  val  )

inlinestatic

void hugemem_write32	(	hugemem_ptr_t	to,
		uint_fast32_t	val
	)

Write 32-bit value val to huge memory address to.

Referenced by ebi_test_data_bus(), ebi_test_data_integrity(), run_data_bus_test(), run_data_integrity_test(), and run_dma_config_interface_test().

static void hugemem_write8 ( hugemem_ptr_t  to, uint8_t  val  )

inlinestatic

static void hugemem_write8 ( hugemem_ptr_t  to, uint_fast8_t  val  )

inlinestatic

Referenced by ebi_test_addr_bus(), and run_address_bus_test().

void hugemem_write_block	(	hugemem_ptr_t	to,
		const void *	from,
		size_t	size
	)