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powerpc/85xx:Avoid hardcoded vector address for IVORs

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For e500 and e500v2 architecturees processor IVPR address should be alinged on
64K boundary.

in start.S, CONFIG_SYS_MONITOR_BASE is stored blindly in IVPR assuming it to be
64K aligned. It may not be true always. If it is not aligned, IVPR + IVORs may
not point to an exception handler.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Prabhakar Kushwaha 2012-02-14 22:49:29 +00:00 committed by Andy Fleming
parent 617e46e3c0
commit a4107f8617
1 changed files with 34 additions and 31 deletions
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65
arch/powerpc/cpu/mpc85xx/start.S
View file

@ -1,5 +1,5 @@
/*
* Copyright 2004, 2007-2011 Freescale Semiconductor, Inc.
* Copyright 2004, 2007-2012 Freescale Semiconductor, Inc.
* Copyright (C) 2003 Motorola,Inc.
*
* See file CREDITS for list of people who contributed to this
@ -183,37 +183,40 @@ l2_disabled:
lis r1,CONFIG_SYS_MONITOR_BASE@h
mtspr IVPR,r1
li r1,0x0100
mtspr IVOR0,r1 /* 0: Critical input */
li r1,0x0200
mtspr IVOR1,r1 /* 1: Machine check */
li r1,0x0300
mtspr IVOR2,r1 /* 2: Data storage */
li r1,0x0400
mtspr IVOR3,r1 /* 3: Instruction storage */
li r1,0x0500
mtspr IVOR4,r1 /* 4: External interrupt */
li r1,0x0600
mtspr IVOR5,r1 /* 5: Alignment */
li r1,0x0700
mtspr IVOR6,r1 /* 6: Program check */
li r1,0x0800
mtspr IVOR7,r1 /* 7: floating point unavailable */
li r1,0x0900
mtspr IVOR8,r1 /* 8: System call */
lis r3,(CONFIG_SYS_MONITOR_BASE & 0xffff)@h
ori r3,r3,(CONFIG_SYS_MONITOR_BASE & 0xffff)@l
addi r4,r3,CriticalInput - _start + _START_OFFSET
mtspr IVOR0,r4 /* 0: Critical input */
addi r4,r3,MachineCheck - _start + _START_OFFSET
mtspr IVOR1,r4 /* 1: Machine check */
addi r4,r3,DataStorage - _start + _START_OFFSET
mtspr IVOR2,r4 /* 2: Data storage */
addi r4,r3,InstStorage - _start + _START_OFFSET
mtspr IVOR3,r4 /* 3: Instruction storage */
addi r4,r3,ExtInterrupt - _start + _START_OFFSET
mtspr IVOR4,r4 /* 4: External interrupt */
addi r4,r3,Alignment - _start + _START_OFFSET
mtspr IVOR5,r4 /* 5: Alignment */
addi r4,r3,ProgramCheck - _start + _START_OFFSET
mtspr IVOR6,r4 /* 6: Program check */
addi r4,r3,FPUnavailable - _start + _START_OFFSET
mtspr IVOR7,r4 /* 7: floating point unavailable */
addi r4,r3,SystemCall - _start + _START_OFFSET
mtspr IVOR8,r4 /* 8: System call */
/* 9: Auxiliary processor unavailable(unsupported) */
li r1,0x0a00
mtspr IVOR10,r1 /* 10: Decrementer */
li r1,0x0b00
mtspr IVOR11,r1 /* 11: Interval timer */
li r1,0x0c00
mtspr IVOR12,r1 /* 12: Watchdog timer */
li r1,0x0d00
mtspr IVOR13,r1 /* 13: Data TLB error */
li r1,0x0e00
mtspr IVOR14,r1 /* 14: Instruction TLB error */
li r1,0x0f00
mtspr IVOR15,r1 /* 15: Debug */
addi r4,r3,Decrementer - _start + _START_OFFSET
mtspr IVOR10,r4 /* 10: Decrementer */
addi r4,r3,IntervalTimer - _start + _START_OFFSET
mtspr IVOR11,r4 /* 11: Interval timer */
addi r4,r3,WatchdogTimer - _start + _START_OFFSET
mtspr IVOR12,r4 /* 12: Watchdog timer */
addi r4,r3,DataTLBError - _start + _START_OFFSET
mtspr IVOR13,r4 /* 13: Data TLB error */
addi r4,r3,InstructionTLBError - _start + _START_OFFSET
mtspr IVOR14,r4 /* 14: Instruction TLB error */
addi r4,r3,DebugBreakpoint - _start + _START_OFFSET
mtspr IVOR15,r4 /* 15: Debug */
/* Clear and set up some registers. */
li r0,0x0000