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-rw-r--r--arch/powerpc/include/asm/mpic.h12
-rw-r--r--arch/powerpc/sysdev/mpic.c34
2 files changed, 46 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index c2ccca53b99..a002682f3a6 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -22,6 +22,14 @@
#define MPIC_GREG_FEATURE_1 0x00010
#define MPIC_GREG_GLOBAL_CONF_0 0x00020
#define MPIC_GREG_GCONF_RESET 0x80000000
+/* On the FSL mpic implementations the Mode field is expand to be
+ * 2 bits wide:
+ * 0b00 = pass through (interrupts routed to IRQ0)
+ * 0b01 = Mixed mode
+ * 0b10 = reserved
+ * 0b11 = External proxy / coreint
+ */
+#define MPIC_GREG_GCONF_COREINT 0x60000000
#define MPIC_GREG_GCONF_8259_PTHROU_DIS 0x20000000
#define MPIC_GREG_GCONF_NO_BIAS 0x10000000
#define MPIC_GREG_GCONF_BASE_MASK 0x000fffff
@@ -357,6 +365,8 @@ struct mpic
#define MPIC_BROKEN_FRR_NIRQS 0x00000800
/* Destination only supports a single CPU at a time */
#define MPIC_SINGLE_DEST_CPU 0x00001000
+/* Enable CoreInt delivery of interrupts */
+#define MPIC_ENABLE_COREINT 0x00002000
/* MPIC HW modification ID */
#define MPIC_REGSET_MASK 0xf0000000
@@ -470,6 +480,8 @@ extern void mpic_end_irq(unsigned int irq);
extern unsigned int mpic_get_one_irq(struct mpic *mpic);
/* This one gets from the primary mpic */
extern unsigned int mpic_get_irq(void);
+/* This one gets from the primary mpic via CoreInt*/
+extern unsigned int mpic_get_coreint_irq(void);
/* Fetch Machine Check interrupt from primary mpic */
extern unsigned int mpic_get_mcirq(void);
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 532e205303a..21b95670159 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1170,6 +1170,12 @@ struct mpic * __init mpic_alloc(struct device_node *node,
mb();
}
+ /* CoreInt */
+ if (flags & MPIC_ENABLE_COREINT)
+ mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
+ mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
+ | MPIC_GREG_GCONF_COREINT);
+
if (flags & MPIC_ENABLE_MCK)
mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
@@ -1525,6 +1531,34 @@ unsigned int mpic_get_irq(void)
return mpic_get_one_irq(mpic);
}
+unsigned int mpic_get_coreint_irq(void)
+{
+#ifdef CONFIG_BOOKE
+ struct mpic *mpic = mpic_primary;
+ u32 src;
+
+ BUG_ON(mpic == NULL);
+
+ src = mfspr(SPRN_EPR);
+
+ if (unlikely(src == mpic->spurious_vec)) {
+ if (mpic->flags & MPIC_SPV_EOI)
+ mpic_eoi(mpic);
+ return NO_IRQ;
+ }
+ if (unlikely(mpic->protected && test_bit(src, mpic->protected))) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "%s: Got protected source %d !\n",
+ mpic->name, (int)src);
+ return NO_IRQ;
+ }
+
+ return irq_linear_revmap(mpic->irqhost, src);
+#else
+ return NO_IRQ;
+#endif
+}
+
unsigned int mpic_get_mcirq(void)
{
struct mpic *mpic = mpic_primary;