1 files changed, 88 insertions, 0 deletions

diff --git a/arch/mips/mips-boards/malta/malta_smtc.c b/arch/mips/mips-boards/malta/malta_smtc.c
new file mode 100644
index 000000000000..d1c80f631100
--- /dev/null
+++ b/arch/mips/mips-boards/malta/malta_smtc.c
@@ -0,0 +1,88 @@
+/*
+ * Malta Platform-specific hooks for SMP operation
+ */
+#include <linux/init.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mipsmtregs.h>
+#include <asm/smtc.h>
+#include <asm/smtc_ipi.h>
+
+/* VPE/SMP Prototype implements platform interfaces directly */
+
+/*
+ * Cause the specified action to be performed on a targeted "CPU"
+ */
+
+void core_send_ipi(int cpu, unsigned int action)
+{
+        /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
+        smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
+}
+
+/*
+ * Platform "CPU" startup hook
+ */
+
+void prom_boot_secondary(int cpu, struct task_struct *idle)
+{
+        smtc_boot_secondary(cpu, idle);
+}
+
+/*
+ * Post-config but pre-boot cleanup entry point
+ */
+
+void prom_init_secondary(void)
+{
+        void smtc_init_secondary(void);
+        int myvpe;
+
+        /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
+        myvpe = read_c0_tcbind() & TCBIND_CURVPE;
+        if (myvpe != 0) {
+                /* Ideally, this should be done only once per VPE, but... */
+                clear_c0_status(STATUSF_IP2);
+                set_c0_status(STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP3
+                                | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6
+                                | STATUSF_IP7);
+        }
+
+        smtc_init_secondary();
+}
+
+/*
+ * Platform SMP pre-initialization
+ *
+ * As noted above, we can assume a single CPU for now
+ * but it may be multithreaded.
+ */
+
+void plat_smp_setup(void)
+{
+        if (read_c0_config3() & (1<<2))
+                mipsmt_build_cpu_map(0);
+}
+
+void __init plat_prepare_cpus(unsigned int max_cpus)
+{
+        if (read_c0_config3() & (1<<2))
+                mipsmt_prepare_cpus();
+}
+
+/*
+ * SMP initialization finalization entry point
+ */
+
+void prom_smp_finish(void)
+{
+        smtc_smp_finish();
+}
+
+/*
+ * Hook for after all CPUs are online
+ */
+
+void prom_cpus_done(void)
+{
+}