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authorGreg Ungerer <gerg@uclinux.org>2009-05-22 07:33:35 +0400
committerGreg Ungerer <gerg@uclinux.org>2009-09-16 03:43:52 +0400
commit39f0fb6a3448cfc316e0d5295ed1b121db50037e (patch)
tree657db8073835e8d499708a898a36f1d3a1e39a32 /arch/m68k
parentf6a66276f5fdc018d2a9378c71de3bae13c588d7 (diff)
downloadlinux-39f0fb6a3448cfc316e0d5295ed1b121db50037e.tar.xz
m68knommu: map ColdFire interrupts to correct masking bits
The older simple ColdFire interrupt controller has no one-to-one mapping of interrupt numbers to bits in the interrupt mask register. Create a mapping array that each ColdFire CPU type can populate with its available interrupts and the bits that each use in the interrupt mask register. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/mcfintc.h22
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/m68k/include/asm/mcfintc.h b/arch/m68k/include/asm/mcfintc.h
index 213aa6c68abb..4183320a3813 100644
--- a/arch/m68k/include/asm/mcfintc.h
+++ b/arch/m68k/include/asm/mcfintc.h
@@ -25,11 +25,6 @@
*/
/*
- * Define the base address of the SIM within the MBAR address space.
- */
-#define MCFSIM_BASE 0x0 /* Base address within SIM */
-
-/*
* Bit definitions for the ICR family of registers.
*/
#define MCFSIM_ICR_AUTOVEC 0x80 /* Auto-vectored intr */
@@ -48,7 +43,9 @@
#define MCFSIM_ICR_PRI3 0x03 /* Priority 3 intr */
/*
- * IMR bit position definitions.
+ * IMR bit position definitions. Not all ColdFire parts with this interrupt
+ * controller actually support all of these interrupt sources. But the bit
+ * numbers are the same in all cores.
*/
#define MCFINTC_EINT1 1 /* External int #1 */
#define MCFINTC_EINT2 2 /* External int #2 */
@@ -70,6 +67,19 @@
#define MCFINTC_QSPI 18
#ifndef __ASSEMBLER__
+
+/*
+ * There is no one-is-one correspondance between the interrupt number (irq)
+ * and the bit fields on the mask register. So we create a per-cpu type
+ * mapping of irq to mask bit. The CPU platform code needs to register
+ * its supported irq's at init time, using this function.
+ */
+extern unsigned char mcf_irq2imr[];
+static inline void mcf_mapirq2imr(int irq, int imr)
+{
+ mcf_irq2imr[irq] = imr;
+}
+
void mcf_autovector(int irq);
void mcf_setimr(int index);
void mcf_clrimr(int index);