Blackfin arch: Initialize the exception vectors early in the boot process

Initialize the exception vectors early in the boot process, so that CPLB faults
can be handled when memory protection is enabled.

Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 22 insertions, 17 deletions

diff --git a/arch/blackfin/mach-common/ints-priority-dc.c b/arch/blackfin/mach-common/ints-priority-dc.c
index 6b9fd03ce835..660f881b620a 100644
--- a/arch/blackfin/mach-common/ints-priority-dc.c
+++ b/arch/blackfin/mach-common/ints-priority-dc.c
@@ -358,26 +358,10 @@ static void bf561_demux_gpio_irq(unsigned int inta_irq,
 
 #endif                          /* CONFIG_IRQCHIP_DEMUX_GPIO */
 
-/*
- * This function should be called during kernel startup to initialize
- * the BFin IRQ handling routines.
- */
-int __init init_arch_irq(void)
+void __init init_exception_vectors(void)
 {
-        int irq;
-        unsigned long ilat = 0;
-        /*  Disable all the peripheral intrs  - page 4-29 HW Ref manual */
-        bfin_write_SICA_IMASK0(SIC_UNMASK_ALL);
-        bfin_write_SICA_IMASK1(SIC_UNMASK_ALL);
         SSYNC();
 
-        bfin_write_SICA_IWR0(IWR_ENABLE_ALL);
-        bfin_write_SICA_IWR1(IWR_ENABLE_ALL);
-
-        local_irq_disable();
-
-        init_exception_buff();
-
 #ifndef CONFIG_KGDB
         bfin_write_EVT0(evt_emulation);
 #endif
@@ -395,6 +379,27 @@ int __init init_arch_irq(void)
         bfin_write_EVT14(evt14_softirq);
         bfin_write_EVT15(evt_system_call);
         CSYNC();
+}
+
+/*
+ * This function should be called during kernel startup to initialize
+ * the BFin IRQ handling routines.
+ */
+int __init init_arch_irq(void)
+{
+        int irq;
+        unsigned long ilat = 0;
+        /*  Disable all the peripheral intrs  - page 4-29 HW Ref manual */
+        bfin_write_SICA_IMASK0(SIC_UNMASK_ALL);
+        bfin_write_SICA_IMASK1(SIC_UNMASK_ALL);
+        SSYNC();
+
+        bfin_write_SICA_IWR0(IWR_ENABLE_ALL);
+        bfin_write_SICA_IWR1(IWR_ENABLE_ALL);
+
+        local_irq_disable();
+
+        init_exception_buff();
 
         for (irq = 0; irq <= SYS_IRQS; irq++) {
                 if (irq <= IRQ_CORETMR)