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ARM: provide a valid exception stack address for startup code 

Create exception stack in IRAM if available to facilitate debugging of
pre-relocation code by catching exceptions rather than stopping dead.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
This commit is contained in:
Lothar Waßmann 2017-06-08 10:16:36 +02:00 committed by Tom Rini
parent c88823612d
commit 69c5d76f2f
1 changed files with 4 additions and 1 deletions
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5
arch/arm/lib/vectors.S
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@ -117,7 +117,6 @@ data_abort:
not_used: not_used:
irq: irq:
fiq: fiq:
1: 1:
bl 1b /* hang and never return */ bl 1b /* hang and never return */
@ -126,7 +125,11 @@ fiq:
/* IRQ stack memory (calculated at run-time) + 8 bytes */ /* IRQ stack memory (calculated at run-time) + 8 bytes */
.globl IRQ_STACK_START_IN .globl IRQ_STACK_START_IN
IRQ_STACK_START_IN: IRQ_STACK_START_IN:
#ifdef IRAM_BASE_ADDR
.word IRAM_BASE_ADDR + 0x20
#else
.word 0x0badc0de .word 0x0badc0de
#endif
@ @
@ IRQ stack frame. @ IRQ stack frame.