IBM POWERPC 750GL User Manual

Page 373

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User’s Manual

IBM PowerPC 750GX and 750GL RISC Microprocessor

750gx_umIX.fm.(1.2)
March 27, 2006

Index

Page 373 of 377

O

OEA

exception mechanism

,

151

memory management specifications

,

179

registers

,

60

Operand conventions

,

82

Operand placement and performance

,

233

Operating environment architecture (OEA)

,

41

Operations

bus operations caused by cache control instructions

,

141

instruction cache block fill

,

139

read operation

,

140

response to snooped bus transactions

,

143

single-beat write operations

,

311

Overview

,

23

P

Page address translation

definition

,

33

page address translation flow

,

202

page size

,

196

selection of page address translation

,

186

,

192

TLB organization

,

200

Page history status

cases of dcbt and dcbtst misses

,

197

R and C bit recording

,

188

,

196

199

Page table updates

,

207

Performance monitor

event counting

,

355

event selecting

,

356

performance monitor interrupt

,

172

,

349

performance monitor SPRs

,

350

purposes

,

349

registers

,

351

warnings

,

356

Physical address generation

,

179

Pipeline

instruction timing, definition

,

210

pipeline stages

,

214

pipelined execution unit

,

212

superscalar/pipeline diagram

,

212

PMC1 and PMC2 registers

,

44

PMCn (performance monitor counter) registers

,

74

,

172

,

351

Power and ground signals

,

278

Power management

doze mode

,

337

dynamic power management

,

335

full-power mode

,

337

nap mode

,

337

programmable power modes

,

336

sleep mode

,

339

software considerations

,

340

PowerPC architecture

operating environment architecture (OEA)

,

41

user instruction set architecture (UISA)

,

41

virtual environment architecture (VEA)

,

41

Priorities, exception

,

153

Process switching

,

162

Processor control instructions

,

108

,

113

,

118

Program exception

,

170

Program order, definition

,

210

Programmable power states

doze mode

,

337

nap mode

,

337

sleep mode

,

339

Protection of memory areas

no-execute protection

,

190

options available

,

187

protection violations

,

192

PVR (processor version register)

,

60

Q

QACK (quiescent acknowledge) signal

,

273

QREQ (quiescent request) signal

,

273

Qualified bus grant

,

285

Qualified data bus grant

,

302

R

Read operation

,

143

Read-atomic operation

,

143

Read-with-intent-to-modify operation

,

143

Real address (RA), see Physical address generation
Real addressing mode (translation disabled)

data accesses

,

189

,

195

instruction accesses

,

189

,

195

support for real addressing mode

,

180

Referenced (R) bit maintenance recording

,

188

,

197

,

204

Registers

implementation-specific

ICTC

,

77

,

348

L2CR

,

81

,

329

MMCR0

,

72

,

172

,

351

MMCR1

,

74

,

172

,

351

SIA

,

75

,

172

THRMn

,

78

UMMCR0

,

73

UMMCR1

,

74

UPMCn

,

75

USIA

,

76

performance monitor registers

,

72

SPR encodings

,

112

supervisor-level

BAT registers

,

61

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