Motorola MVME2400 Series Wartungshandbuch PDF herunterladen (Seite 235)

Programming Model

http://www.mcg.mot.com/literature 3-49

sien When sien is set, the logging of a single-bit error causes

the int

bit to be set if it is not already. When the int bit is

set, the Hawk’s internal SMC_INT signal to the MPIC is

asserted.

mien

When mien is set, the logging of a non-correctable error

causes the int

bit to be set if it is not already. When the int

bit is set, the Hawk’s internal SMC_INT signal to the

MPIC is asserted.

int

int is set when one of the SMC’s interrupt conditions

occurs. It is cleared by reset or by software writing a one

to it. The Hawk’s internal SMC_INT signal tracks int.

When int is set, SMC_INT is asserted. When int is

cleared, SMC_INT is negated.

mbe_me

When mbe_me is set, the detection of a multiple-bit error

during a PowerPC read or write to SDRAM causes the

SMC to pulse its machine check interrupt request pin

(MCHK0_) true. When mbe_me

is cleared, the SMC

does not assert its MCHK0_ pin on multiple-bit errors.

The SMC never asserts its MCHK0_ pin in response to a

multiple-bit error detected during a scrub cycle.

Caution

Note that the SMC_INT (internal signal) and the MCHK0_

pin are the only non-polled notification that a multiple-bit

error has occurred. The SMC does not assert TEA as a result

of a multiple bit error. In fact, the SMC does not have a TEA_

signal pin and it assumes that the system does not implement

TEA.

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Motorola MVME2400 Series Wartungshandbuch Seite 235