[SPARC64]: Allocate and register the 4 sun4v mondo queues at bootup.
David S. Miller [Wed, 8 Feb 2006 08:08:23 +0000 (00:08 -0800)]
Needs to occur before we enable PSTATE_IE in %pstate.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/irq.c
arch/sparc64/kernel/trampoline.S

index d069a6f..3c1a213 100644 (file)
@@ -855,6 +855,51 @@ void init_irqwork_curcpu(void)
        memset(__irq_work + cpu, 0, sizeof(struct irq_work_struct));
 }
 
+static void __cpuinit init_one_mondo(unsigned long *pa_ptr, unsigned long type)
+{
+       register unsigned long func __asm__("%o0");
+       register unsigned long arg0 __asm__("%o1");
+       register unsigned long arg1 __asm__("%o2");
+       register unsigned long arg2 __asm__("%o3");
+       unsigned long page = get_zeroed_page(GFP_ATOMIC);
+
+       if (!page) {
+               prom_printf("SUN4V: Error, cannot allocate mondo queue.\n");
+               prom_halt();
+       }
+
+       *pa_ptr = __pa(page);
+
+       func = HV_FAST_CPU_QCONF;
+       arg0 = type;
+       arg1 = *pa_ptr;
+       arg2 = 128; /* XXX Implied by Niagara queue offsets. XXX */
+       __asm__ __volatile__("ta        %8"
+                            : "=&r" (func), "=&r" (arg0),
+                              "=&r" (arg1), "=&r" (arg2)
+                            : "0" (func), "1" (arg0),
+                              "2" (arg1), "3" (arg2),
+                              "i" (HV_FAST_TRAP));
+
+       if (func != HV_EOK) {
+               prom_printf("SUN4V: cpu_qconf(%lu) failed with error %lu\n",
+                           type, func);
+               prom_halt();
+       }
+}
+
+/* Allocate and init the mondo queues for this cpu.  */
+void __cpuinit sun4v_init_mondo_queues(void)
+{
+       int cpu = hard_smp_processor_id();
+       struct trap_per_cpu *tb = &trap_block[cpu];
+
+       init_one_mondo(&tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO);
+       init_one_mondo(&tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO);
+       init_one_mondo(&tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR);
+       init_one_mondo(&tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR);
+}
+
 /* Only invoked on boot processor. */
 void __init init_IRQ(void)
 {
@@ -862,6 +907,9 @@ void __init init_IRQ(void)
        kill_prom_timer();
        memset(&ivector_table[0], 0, sizeof(ivector_table));
 
+       if (tlb_type == hypervisor)
+               sun4v_init_mondo_queues();
+
        /* We need to clear any IRQ's pending in the soft interrupt
         * registers, a spurious one could be left around from the
         * PROM timer which we just disabled.
index d9e2af3..fbf844f 100644 (file)
@@ -309,7 +309,17 @@ do_unlock:
 
        call            init_irqwork_curcpu
         nop
-       call            init_cur_cpu_trap
+
+       sethi           %hi(tlb_type), %g3
+       lduw            [%g3 + %lo(tlb_type)], %g2
+       cmp             %g2, 3
+       bne,pt          %icc, 1f
+        nop
+
+       call            sun4v_init_mondo_queues
+        nop
+
+1:     call            init_cur_cpu_trap
         nop
 
        /* Start using proper page size encodings in ctx register.  */