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arm: interrupt_init: set sp in IRQ/FIQ modes

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Before this commit, the stack addresses for IRQ and FIQ modes,
IRQ_STACK_START and FIQ_STACK_START, were computed in interrupt_init but
they were not used.

This commit sets the stack pointers for IRQ and FIQ modes.

Signed-off-by: Georges Savoundararadj <savoundg@gmail.com>
Acked-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
This commit is contained in:
Georges Savoundararadj 2014-10-28 23:16:12 +01:00 committed by Tom Rini
parent 3ff46cc42b
commit 571bdf16a7
1 changed files with 27 additions and 0 deletions
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27
arch/arm/lib/interrupts.c
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@ -28,6 +28,8 @@ DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_USE_IRQ
int interrupt_init (void)
{
unsigned long cpsr;
/*
* setup up stacks if necessary
*/
@ -35,6 +37,31 @@ int interrupt_init (void)
IRQ_STACK_START_IN = gd->irq_sp + 8;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
__asm__ __volatile__("mrs %0, cpsr\n"
: "=r" (cpsr)
:
: "memory");
__asm__ __volatile__("msr cpsr_c, %0\n"
"mov sp, %1\n"
:
: "r" (IRQ_MODE | I_BIT | F_BIT | (cpsr & ~FIQ_MODE)),
"r" (IRQ_STACK_START)
: "memory");
__asm__ __volatile__("msr cpsr_c, %0\n"
"mov sp, %1\n"
:
: "r" (FIQ_MODE | I_BIT | F_BIT | (cpsr & ~IRQ_MODE)),
"r" (FIQ_STACK_START)
: "memory");
__asm__ __volatile__("msr cpsr_c, %0"
:
: "r" (cpsr)
: "memory");
return arch_interrupt_init();
}