ARM ARM1176JZF-S User Manual

Programmer’s Model
ARM DDI 0301H Copyright © 2004-2009 ARM Limited. All rights reserved. 2-55
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Internal Prefetch Abort
On an internal prefetch abort:
/* secure state is unchanged */
R14_abt = address of the aborted instruction + 4
SPSR_abt = CPSR
CPSR [4:0] = 0b10111 /* Enter abort mode */
CPSR [5] = 0 /* Execute in ARM state */
CPSR [7] = 1 /* Disable interrupts */
CPSR [8] = 1 /* Disable imprecise aborts */
CPSR [9] = Secure EE-bit /* store value of secure Control Reg[25] */
CPSR[24] = 0 /* Clear J bit */
if high vectors configured then
PC = 0xFFFF000C
else
PC = Secure_Base_Address + 0x0000000C
External Data Abort
On an External Precise Data Abort or on an External Imprecise Abort with CPSR[8]=0 (A bit):
/* secure state is unchanged */
if SCR[3]=1 /* external aborts trapped to Secure Monitor mode */
R14_mon = address of the aborted instruction + 8
SPSR_mon = CPSR
CPSR [4:0] = 0b10110 /* Enter Secure Monitor mode */
CPSR [5] = 0 /* Execute in ARM state */
CPSR [6] = 1 /* Disable fast interrupts */
CPSR [7] = 1 /* Disable interrupts */
CPSR [8] = 1 /* Disable imprecise aborts */
CPSR [9] = Secure EE-bit /* store value of secure Control Reg[25] */
CPSR[24] = 0 /* Clear J bit */
PC = Monitor_Base_Address + 0x00000010
Else /* external Aborts trapped in abort mode */
R14_abt = address of the aborted instruction + 8
SPSR_abt = CPSR
CPSR [4:0] = 0b10111 /* Enter abort mode */
CPSR [5] = 0 /* Execute in ARM state */
CPSR [7] = 1 /* Disable interrupts */
CPSR [8] = 1 /* Disable imprecise aborts */
CPSR [9] = Secure EE-bit /* store value of secure Control Reg[25] */
CPSR[24] = 0 /* Clear J bit */
if high vectors configured then
PC = 0xFFFF0010
else
PC = Secure_Base_Address + 0x00000010
Internal Data Abort
On an Internal Data Abort. All aborts that are not external aborts, i.e. data aborts on L1 memory
management occurring when a fault is detected in MMU:
/* secure state is unchanged */
R14_abt = address of the aborted instruction + 8
SPSR_abt = CPSR
CPSR [4:0] = 0b10111 /* Enter abort mode */
CPSR [5] = 0 /* Execute in ARM state */
CPSR [7] = 1 /* Disable interrupts */
CPSR [8] = 1 /* Disable imprecise aborts */
CPSR [9] = Secure EE-bit /* store value of secure Control Reg[25] */
CPSR[24] = 0 /* Clear J bit */
if high vectors configured then

ARM ARM1176JZF-S Specifications

General

Brand	ARM
Model	ARM1176JZF-S
Category	Computer Hardware
Language	English