pSOSystem System Calls - Read

m_int2ext pSOS+ System Calls
m_int2ext Converts an internal address into an external address.
unsigned long m_int2ext(
void *int_addr, /* local reference */
void **ext_addr /* external reference */
)
Description
Arguments
Return Value
Error Codes
Notes
When a node on a multiprocessor system passes an address that resides within a
dual-ported zone, it first must convert the address by calling m_int2ext(). This
call applies to systems with multiple processors that are connected by dual-ported
memory on a memory bus.
int_addr Specifies the internal address.
ext_addr Points to the variable where m_int2ext() stores the
resultant external address. If the internal address is within a
dual-ported zone whose p-port is tied to the calling node, the
external address is different. In all other cases, the internal
and external addresses are the same.
This call always returns 0.
None.
Be careful about structures that straddle the boundary of a dual-port zone, because
the structure’s address range could contain a discontinuity.
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