From ac29c11d4cd4fa1fac968e99998a956405732f2f Mon Sep 17 00:00:00 2001 From: David S. Miller Date: Wed, 8 Feb 2006 00:08:23 -0800 Subject: [SPARC64]: Allocate and register the 4 sun4v mondo queues at bootup. Needs to occur before we enable PSTATE_IE in %pstate. Signed-off-by: David S. Miller --- arch/sparc64/kernel/irq.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'arch/sparc64/kernel/irq.c') diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c index d069a6feb535..3c1a2139f1b9 100644 --- a/arch/sparc64/kernel/irq.c +++ b/arch/sparc64/kernel/irq.c @@ -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. -- cgit v1.2.3-55-g7522