DEC: Document the R4k MB ASIC mini interrupt controller

[cascardo/linux.git] / arch / mips / kernel / smp-gic.c

diff --git a/arch/mips/kernel/smp-gic.c b/arch/mips/kernel/smp-gic.c
index 3bb1f92..3b21a96 100644 (file)
--- a/arch/mips/kernel/smp-gic.c
+++ b/arch/mips/kernel/smp-gic.c
@@ -15,12 +15,14 @@
 #include <linux/printk.h>
 
 #include <asm/gic.h>
+#include <asm/mips-cpc.h>
 #include <asm/smp-ops.h>
 
 void gic_send_ipi_single(int cpu, unsigned int action)
 {
        unsigned long flags;
        unsigned int intr;
+       unsigned int core = cpu_data[cpu].core;
 
        pr_debug("CPU%d: %s cpu %d action %u status %08x\n",
                 smp_processor_id(), __func__, cpu, action, read_c0_status());
@@ -41,6 +43,15 @@ void gic_send_ipi_single(int cpu, unsigned int action)
        }
 
        gic_send_ipi(intr);
+
+       if (mips_cpc_present() && (core != current_cpu_data.core)) {
+               while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) {
+                       mips_cpc_lock_other(core);
+                       write_cpc_co_cmd(CPC_Cx_CMD_PWRUP);
+                       mips_cpc_unlock_other();
+               }
+       }
+
        local_irq_restore(flags);
 }