[POWERPC] MPIC: support more than 256 sources

Allow more than the default 256 MPIC sources. Allocates a new flag
(MPIC_LARGE_VECTORS) to be used by platform code when instantiating
the mpic.

I picked 11 bits worth right now since it would cover the number of
sources on any hardware I have seen. It can always be increased later
if needed.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 9 insertions, 15 deletions

diff --git a/include/asm-powerpc/mpic.h b/include/asm-powerpc/mpic.h
index b71e7b32a55..cb204a71e91 100644
--- a/include/asm-powerpc/mpic.h
+++ b/include/asm-powerpc/mpic.h
@@ -103,21 +103,6 @@
 #define MPIC_MAX_ISU            32
 
 /*
- * Special vector numbers (internal use only)
- */
-#define MPIC_VEC_SPURRIOUS      255
-#define MPIC_VEC_IPI_3          254
-#define MPIC_VEC_IPI_2          253
-#define MPIC_VEC_IPI_1          252
-#define MPIC_VEC_IPI_0          251
-
-/* unused */
-#define MPIC_VEC_TIMER_3        250
-#define MPIC_VEC_TIMER_2        249
-#define MPIC_VEC_TIMER_1        248
-#define MPIC_VEC_TIMER_0        247
-
-/*
  * Tsi108 implementation of MPIC has many differences from the original one
  */
 
@@ -276,6 +261,13 @@ struct mpic
         unsigned char           *senses;
         unsigned int            senses_count;
 
+        /* vector numbers used for internal sources (ipi/timers) */
+        unsigned int            ipi_vecs[4];
+        unsigned int            timer_vecs[4];
+
+        /* Spurious vector to program into unused sources */
+        unsigned int            spurious_vec;
+
 #ifdef CONFIG_MPIC_BROKEN_U3
         /* The fixup table */
         struct mpic_irq_fixup   *fixups;
@@ -332,6 +324,8 @@ struct mpic
 #define MPIC_NO_PTHROU_DIS              0x00000040
 /* DCR based MPIC */
 #define MPIC_USES_DCR                   0x00000080
+/* MPIC has 11-bit vector fields (or larger) */
+#define MPIC_LARGE_VECTORS              0x00000100
 
 /* MPIC HW modification ID */
 #define MPIC_REGSET_MASK                0xf0000000