Motorola MVME2400 Series Manuel de service télécharger pdf (Page 123)

Registers

http://www.mcg.mot.com/literature 2-65

Registers

This section provides a detailed description of all PHB registers. The

section is divided into two parts: the first covers the PPC Registers and the

second part covers the PCI Configuration Registers. The PPC Registers are

accessible only from the PPC bus using any single beat valid transfer size.

The PCI Configuration Registers reside in PCI configuration space. These

are primarily accessible from the PPC bus by using the

CONFIG_ADDRESS and CONFIG_DATA registers. The PPC Registers

are described first; the PCI Configuration Registers are described next. A

complete discussion of the MPIC registers can be found later in this

chapter.

It is possible to place the base address of the PPC registers at either

$FEFF0000 or $FEFE0000. Having two choices for where the base

registers reside allows the system designer to use two of the Hawk’s PCI

Host Bridges connected to one PPC60x bus. Please refer to the section

titled “PHB Hardware Configuration” for more information. All

references to the PPC registers of PHB within this document are made with

respect to the base address $FEFF0000.

The following conventions are used in the Hawk register charts:

❏ R Read Only field.

❏ R/W Read/Write field.

❏ S Writing a ONE to this field sets this field.

❏ C Writing a ONE to this field clears this field.

PPC Registers

The PPC register map of the PHB is shown in Table 2-6.

1 2 ... 118 119 120 121 122 123 124 125 126 127 128 ... 353 354

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Motorola MVME2400 Series Manuel de service Page 123