mem.c File Reference

VM Memory. More...

#include "pm.h"

Defines
#define	__FILE_ID__   0x0D
Functions
uint16_t	mem_getWord (PmMemSpace_t memspace, uint8_t const **paddr)
uint32_t	mem_getInt (PmMemSpace_t memspace, uint8_t const **paddr)
void	mem_copy (PmMemSpace_t memspace, uint8_t **pdest, uint8_t const **psrc, uint16_t count)
uint16_t	mem_getStringLength (PmMemSpace_t memspace, uint8_t const *const pstr)
PmReturn_t	mem_cmpn (uint8_t *cname, uint8_t cnamelen, PmMemSpace_t memspace, uint8_t const **paddr)

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Detailed Description

VM Memory.

VM memory operations. Implementations and stubs for getByte and memCopy functions. Functions to load object images from static memory.

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Function Documentation

PmReturn_t mem_cmpn	(	uint8_t *	cname,
		uint8_t	cnamelen,
		PmMemSpace_t	memspace,
		uint8_t const **	paddr
	)

Compares a byte array in RAM to a byte array in the given memory space

Parameters:

	cname	Pointer to byte array in RAM
	cnamelen	Length of byte array to compare
	memspace	Memory space of other byte array
	paddr	Pointer to address of other byte array

Returns:

PM_RET_OK if all bytes in both arrays match; PM_RET_NO otherwise

void mem_copy	(	PmMemSpace_t	memspace,
		uint8_t **	pdest,
		uint8_t const **	psrc,
		uint16_t	count
	)

Copies count number of bytes from src in memspace to dest in RAM. Leaves dest and src pointing one byte past end of the data.

Parameters:

	memspace	memory space/type of source
	pdest	ptr to destination address
	psrc	ptr to source address
	count	number of bytes to copy

Returns:

nothing. src, dest - point 1 past end of data

See also:

sli_memcpy

uint32_t mem_getInt	(	PmMemSpace_t	memspace,
		uint8_t const **	paddr
	)

Returns the 4-byte int at the given address in memspace.

Int obtained in LITTLE ENDIAN order (per Python convention). afterward, addr points one byte past the int.

Parameters:

	memspace	memory space
	paddr	ptr to address

Returns:

int from memory. addr - points one byte past the word

uint16_t mem_getStringLength	(	PmMemSpace_t	memspace,
		uint8_t const *const	pstr
	)

Returns the number of bytes in the C string pointed to by pstr. Does not modify pstr

Parameters:

	memspace	memory space/type of source
	psrc	ptr to source address

Returns:

Number of bytes in the string.

uint16_t mem_getWord	(	PmMemSpace_t	memspace,
		uint8_t const **	paddr
	)

Returns the 2-byte word at the given address in memspace.

Word obtained in LITTLE ENDIAN order (per Python convention). afterward, addr points one byte past the word.

Parameters:

	memspace	memory space
	paddr	ptr to address

Returns:

word from memory. addr - points one byte past the word