G2 Core
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 2-11
2.3.1.2 PowerQUICC II-Specific Registers
The set of registers specific to the MPC603e are also shown in Figure 2-2. Most of these are described in
the G2 Core Reference Manual and are implemented in the PowerQUICC II as follows:
MMU software table search registers: DMISS, DCMP, HASH1, HASH2, IMISS, ICMP, and RPA.
These registers facilitate the software required to search the page tables in memory.
IABR. This register facilitates the setting of instruction breakpoints.
The hardware implementation-dependent registers (HIDx) are implemented differently in the
PowerQUICC II, and they are described in the following subsections.
2.3.1.2.1 Hardware Implementation-Dependent Register 0 (HID0)
Figure 2-3 shows the PowerQUICC II implementation of HID0.
Tabl e 2-1 shows the bit definitions for HID0.
0 1 2 34 6789101112 1415
EMCP EBA EBD PAR DOZE SLEEP DPM NHR
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
ICE DCE ILOCK DLOCK ICFI DCFI IFEM FBIOB ABE NOOPTI
Figure 2-3. Hardware Implementation Register 0 (HID0)
Table2-1. HID0 Field Descriptions
Bits Name Description
0 EMCP Enable machine check input pin
0 The assertion of the MCP does not cause a machine check exception.
1 Enables the entry into a machine check exception based on assertion of the MCP input,
detection of a Cache Parity Error, detection of an address parity error, or detection of a data
parity error.
Note that the machine check exception is further affected by MSR[ME], which specifies whether
the processor checkstops or continues processing.
1—Reserved
2 EBA Enable/disable 60x bus address parity checking
0 Prevents address parity checking.
1 Allows a address parity error to cause a checkstop if MSR[ME] = 0 or a machine check
exception if MSR[ME] = 1.
EBA and EBD let the processor operate with memory subsystems that do not generate parity.
3 EBD Enable 60x bus data parity checking
0 Parity checking is disabled.
1 Allows a data parity error to cause a checkstop if MSR[ME] = 0 or a machine check exception
if MSR[ME] = 1.
EBA and EBD let the processor operate with memory subsystems that do not generate parity.
4–6 — Reserved