arm64: GICv3: introduce symbolic names for GICv3 ICC_SGI1R_EL1 fields

The gic_send_sgi() function used hardcoded bit shift values to
generate the ICC_SGI1R_EL1 register value.
Replace this with symbolic names to allow reusing them later.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 1a146cc..2ab290b 100644 (file)
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -481,15 +481,19 @@ out:
        return tlist;
 }
 
+#define MPIDR_TO_SGI_AFFINITY(cluster_id, level) \
+       (MPIDR_AFFINITY_LEVEL(cluster_id, level) \
+               << ICC_SGI1R_AFFINITY_## level ##_SHIFT)
+
 static void gic_send_sgi(u64 cluster_id, u16 tlist, unsigned int irq)
 {
        u64 val;
 
-       val = (MPIDR_AFFINITY_LEVEL(cluster_id, 3) << 48        |
-              MPIDR_AFFINITY_LEVEL(cluster_id, 2) << 32        |
-              irq << 24                                        |
-              MPIDR_AFFINITY_LEVEL(cluster_id, 1) << 16        |
-              tlist);
+       val = (MPIDR_TO_SGI_AFFINITY(cluster_id, 3)     |
+              MPIDR_TO_SGI_AFFINITY(cluster_id, 2)     |
+              irq << ICC_SGI1R_SGI_ID_SHIFT            |
+              MPIDR_TO_SGI_AFFINITY(cluster_id, 1)     |
+              tlist << ICC_SGI1R_TARGET_LIST_SHIFT);
 
        pr_debug("CPU%d: ICC_SGI1R_EL1 %llx\n", smp_processor_id(), val);
        gic_write_sgi1r(val);

diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index 3fb4d85..800544b 100644 (file)
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -280,6 +280,18 @@
 #define ICC_SRE_EL2_SRE                        (1 << 0)
 #define ICC_SRE_EL2_ENABLE             (1 << 3)
 
+#define ICC_SGI1R_TARGET_LIST_SHIFT    0
+#define ICC_SGI1R_TARGET_LIST_MASK     (0xffff << ICC_SGI1R_TARGET_LIST_SHIFT)
+#define ICC_SGI1R_AFFINITY_1_SHIFT     16
+#define ICC_SGI1R_AFFINITY_1_MASK      (0xff << ICC_SGI1R_AFFINITY_1_SHIFT)
+#define ICC_SGI1R_SGI_ID_SHIFT         24
+#define ICC_SGI1R_SGI_ID_MASK          (0xff << ICC_SGI1R_SGI_ID_SHIFT)
+#define ICC_SGI1R_AFFINITY_2_SHIFT     32
+#define ICC_SGI1R_AFFINITY_2_MASK      (0xffULL << ICC_SGI1R_AFFINITY_1_SHIFT)
+#define ICC_SGI1R_IRQ_ROUTING_MODE_BIT 40
+#define ICC_SGI1R_AFFINITY_3_SHIFT     48
+#define ICC_SGI1R_AFFINITY_3_MASK      (0xffULL << ICC_SGI1R_AFFINITY_1_SHIFT)
+
 /*
  * System register definitions
  */