MIPS: smp.c: Introduce mechanism for freeing and allocating IPIs

[cascardo/linux.git] / arch / mips / include / asm / smp.h

diff --git a/arch/mips/include/asm/smp.h b/arch/mips/include/asm/smp.h
index 03722d4..060f23f 100644 (file)
--- a/arch/mips/include/asm/smp.h
+++ b/arch/mips/include/asm/smp.h
@@ -23,7 +23,7 @@
 extern int smp_num_siblings;
 extern cpumask_t cpu_sibling_map[];
 extern cpumask_t cpu_core_map[];
-extern cpumask_t cpu_foreign_map;
+extern cpumask_t cpu_foreign_map[];
 
 #define raw_smp_processor_id() (current_thread_info()->cpu)
 
@@ -53,6 +53,8 @@ extern cpumask_t cpu_coherent_mask;
 
 extern void asmlinkage smp_bootstrap(void);
 
+extern void calculate_cpu_foreign_map(void);
+
 /*
  * this function sends a 'reschedule' IPI to another CPU.
  * it goes straight through and wastes no time serializing
@@ -83,6 +85,20 @@ static inline void __cpu_die(unsigned int cpu)
 extern void play_dead(void);
 #endif
 
+/*
+ * This function will set up the necessary IPIs for Linux to communicate
+ * with the CPUs in mask.
+ * Return 0 on success.
+ */
+int mips_smp_ipi_allocate(const struct cpumask *mask);
+
+/*
+ * This function will free up IPIs allocated with mips_smp_ipi_allocate to the
+ * CPUs in mask, which must be a subset of the IPIs that have been configured.
+ * Return 0 on success.
+ */
+int mips_smp_ipi_free(const struct cpumask *mask);
+
 static inline void arch_send_call_function_single_ipi(int cpu)
 {
        extern struct plat_smp_ops *mp_ops;     /* private */