MIPS: Move GIC IPI functions out of smp-cmp.c

The GIC IPI functions aren't necessarily specific to the "CMP
framework" SMP implementation, and will be used elsewhere in a
subsequent commit. This patch adds cleaned up GIC IPI functions to a
separate file which is compiled when a new CONFIG_MIPS_GIC_IPI Kconfig
symbol is selected, and selects that symbol for CONFIG_MIPS_CMP.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6359/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 56 insertions, 50 deletions

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 26c6175e1379..786a51ddbb78 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_MIPS_MT_FPAFF)	+= mips-mt-fpaff.o
 obj-$(CONFIG_MIPS_MT_SMTC)      += smtc.o smtc-asm.o smtc-proc.o
 obj-$(CONFIG_MIPS_MT_SMP)       += smp-mt.o
 obj-$(CONFIG_MIPS_CMP)          += smp-cmp.o
+obj-$(CONFIG_MIPS_GIC_IPI)      += smp-gic.o
 obj-$(CONFIG_CPU_MIPSR2)        += spram.o
 
 obj-$(CONFIG_MIPS_VPE_LOADER)   += vpe.o
diff --git a/arch/mips/kernel/smp-cmp.c b/arch/mips/kernel/smp-cmp.c
index 1b925d8a610c..594660ed19dc 100644
--- a/arch/mips/kernel/smp-cmp.c
+++ b/arch/mips/kernel/smp-cmp.c
@@ -39,54 +39,6 @@
 #include <asm/amon.h>
 #include <asm/gic.h>
 
-static void ipi_call_function(unsigned int cpu)
-{
-        pr_debug("CPU%d: %s cpu %d status %08x\n",
-                 smp_processor_id(), __func__, cpu, read_c0_status());
-
-        gic_send_ipi(plat_ipi_call_int_xlate(cpu));
-}
-
-
-static void ipi_resched(unsigned int cpu)
-{
-        pr_debug("CPU%d: %s cpu %d status %08x\n",
-                 smp_processor_id(), __func__, cpu, read_c0_status());
-
-        gic_send_ipi(plat_ipi_resched_int_xlate(cpu));
-}
-
-/*
- * FIXME: This isn't restricted to CMP
- * The SMVP kernel could use GIC interrupts if available
- */
-void cmp_send_ipi_single(int cpu, unsigned int action)
-{
-        unsigned long flags;
-
-        local_irq_save(flags);
-
-        switch (action) {
-        case SMP_CALL_FUNCTION:
-                ipi_call_function(cpu);
-                break;
-
-        case SMP_RESCHEDULE_YOURSELF:
-                ipi_resched(cpu);
-                break;
-        }
-
-        local_irq_restore(flags);
-}
-
-static void cmp_send_ipi_mask(const struct cpumask *mask, unsigned int action)
-{
-        unsigned int i;
-
-        for_each_cpu(i, mask)
-                cmp_send_ipi_single(i, action);
-}
-
 static void cmp_init_secondary(void)
 {
         struct cpuinfo_mips *c = &current_cpu_data;
@@ -210,8 +162,8 @@ void __init cmp_prepare_cpus(unsigned int max_cpus)
 }
 
 struct plat_smp_ops cmp_smp_ops = {
-        .send_ipi_single        = cmp_send_ipi_single,
-        .send_ipi_mask          = cmp_send_ipi_mask,
+        .send_ipi_single        = gic_send_ipi_single,
+        .send_ipi_mask          = gic_send_ipi_mask,
         .init_secondary         = cmp_init_secondary,
         .smp_finish             = cmp_smp_finish,
         .cpus_done              = cmp_cpus_done,
diff --git a/arch/mips/kernel/smp-gic.c b/arch/mips/kernel/smp-gic.c
new file mode 100644
index 000000000000..3bb1f92ab525
--- /dev/null
+++ b/arch/mips/kernel/smp-gic.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * Based on smp-cmp.c:
+ *  Copyright (C) 2007 MIPS Technologies, Inc.
+ *  Author: Chris Dearman (chris@mips.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/printk.h>
+
+#include <asm/gic.h>
+#include <asm/smp-ops.h>
+
+void gic_send_ipi_single(int cpu, unsigned int action)
+{
+        unsigned long flags;
+        unsigned int intr;
+
+        pr_debug("CPU%d: %s cpu %d action %u status %08x\n",
+                 smp_processor_id(), __func__, cpu, action, read_c0_status());
+
+        local_irq_save(flags);
+
+        switch (action) {
+        case SMP_CALL_FUNCTION:
+                intr = plat_ipi_call_int_xlate(cpu);
+                break;
+
+        case SMP_RESCHEDULE_YOURSELF:
+                intr = plat_ipi_resched_int_xlate(cpu);
+                break;
+
+        default:
+                BUG();
+        }
+
+        gic_send_ipi(intr);
+        local_irq_restore(flags);
+}
+
+void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action)
+{
+        unsigned int i;
+
+        for_each_cpu(i, mask)
+                gic_send_ipi_single(i, action);
+}