[U-Boot] [PATCH 3/3] arm: enable_interrupts: set sp in IRQ/FIQ modes

Georges Savoundararadj
2014-09-21T21:33:50Z

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

Signed-off-by: Georges Savoundararadj <savoundg@gmail.com>
---
arch/arm/lib/interrupts.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/arch/arm/lib/interrupts.c b/arch/arm/lib/interrupts.c
index f6b7c03..49c1bf3 100644
--- a/arch/arm/lib/interrupts.c
+++ b/arch/arm/lib/interrupts.c
@@ -34,6 +34,25 @@ int interrupt_init (void)
IRQ_STACK_START_IN = gd->irq_sp + 8;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;

+ __asm__ __volatile__("msr cpsr_c, %0\n"
+ "mov sp, %1\n"
+ :
+ : "r" (IRQ_MODE | I_BIT | F_BIT),
+ "r" (IRQ_STACK_START)
+ : "memory");
+
+ __asm__ __volatile__("msr cpsr_c, %0\n"
+ "mov sp, %1\n"
+ :
+ : "r" (FIQ_MODE | I_BIT | F_BIT),
+ "r" (FIQ_STACK_START)
+ : "memory");
+
+ __asm__ __volatile__("msr cpsr_c, %0"
+ :
+ : "r" (SVC_MODE | I_BIT | F_BIT)
+ : "memory");
+
return arch_interrupt_init();
}

--
2.1.0