* 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (66 commits)
x86: export vector_used_by_percpu_irq
x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
sched: nominate preferred wakeup cpu, fix
x86: fix lguest used_vectors breakage, -v2
x86: fix warning in arch/x86/kernel/io_apic.c
sched: fix warning in kernel/sched.c
sched: move test_sd_parent() to an SMP section of sched.h
sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0
sched: activate active load balancing in new idle cpus
sched: bias task wakeups to preferred semi-idle packages
sched: nominate preferred wakeup cpu
sched: favour lower logical cpu number for sched_mc balance
sched: framework for sched_mc/smt_power_savings=N
sched: convert BALANCE_FOR_xx_POWER to inline functions
x86: use possible_cpus=NUM to extend the possible cpus allowed
x86: fix cpu_mask_to_apicid_and to include cpu_online_mask
x86: update io_apic.c to the new cpumask code
x86: Introduce topology_core_cpumask()/topology_thread_cpumask()
x86: xen: use smp_call_function_many()
x86: use work_on_cpu in x86/kernel/cpu/mcheck/mce_amd_64.c
...
Fixed up trivial conflict in kernel/time/tick-sched.c manually
#define DBG(fmt...)
#endif
-int smp_hw_index[NR_CPUS];
struct thread_info *secondary_ti;
- cpumask_t cpu_possible_map = CPU_MASK_NONE;
- cpumask_t cpu_online_map = CPU_MASK_NONE;
DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE;
DEFINE_PER_CPU(cpumask_t, cpu_core_map) = CPU_MASK_NONE;
--- /dev/null
- static void sun4u_set_affinity(unsigned int virt_irq, cpumask_t mask)
+/* irq.c: UltraSparc IRQ handling/init/registry.
+ *
+ * Copyright (C) 1997, 2007, 2008 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
+ * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/linkage.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/bootmem.h>
+#include <linux/irq.h>
+
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/atomic.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/iommu.h>
+#include <asm/upa.h>
+#include <asm/oplib.h>
+#include <asm/prom.h>
+#include <asm/timer.h>
+#include <asm/smp.h>
+#include <asm/starfire.h>
+#include <asm/uaccess.h>
+#include <asm/cache.h>
+#include <asm/cpudata.h>
+#include <asm/auxio.h>
+#include <asm/head.h>
+#include <asm/hypervisor.h>
+#include <asm/cacheflush.h>
+
+#include "entry.h"
+
+#define NUM_IVECS (IMAP_INR + 1)
+
+struct ino_bucket *ivector_table;
+unsigned long ivector_table_pa;
+
+/* On several sun4u processors, it is illegal to mix bypass and
+ * non-bypass accesses. Therefore we access all INO buckets
+ * using bypass accesses only.
+ */
+static unsigned long bucket_get_chain_pa(unsigned long bucket_pa)
+{
+ unsigned long ret;
+
+ __asm__ __volatile__("ldxa [%1] %2, %0"
+ : "=&r" (ret)
+ : "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __irq_chain_pa)),
+ "i" (ASI_PHYS_USE_EC));
+
+ return ret;
+}
+
+static void bucket_clear_chain_pa(unsigned long bucket_pa)
+{
+ __asm__ __volatile__("stxa %%g0, [%0] %1"
+ : /* no outputs */
+ : "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __irq_chain_pa)),
+ "i" (ASI_PHYS_USE_EC));
+}
+
+static unsigned int bucket_get_virt_irq(unsigned long bucket_pa)
+{
+ unsigned int ret;
+
+ __asm__ __volatile__("lduwa [%1] %2, %0"
+ : "=&r" (ret)
+ : "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __virt_irq)),
+ "i" (ASI_PHYS_USE_EC));
+
+ return ret;
+}
+
+static void bucket_set_virt_irq(unsigned long bucket_pa,
+ unsigned int virt_irq)
+{
+ __asm__ __volatile__("stwa %0, [%1] %2"
+ : /* no outputs */
+ : "r" (virt_irq),
+ "r" (bucket_pa +
+ offsetof(struct ino_bucket,
+ __virt_irq)),
+ "i" (ASI_PHYS_USE_EC));
+}
+
+#define irq_work_pa(__cpu) &(trap_block[(__cpu)].irq_worklist_pa)
+
+static struct {
+ unsigned int dev_handle;
+ unsigned int dev_ino;
+ unsigned int in_use;
+} virt_irq_table[NR_IRQS];
+static DEFINE_SPINLOCK(virt_irq_alloc_lock);
+
+unsigned char virt_irq_alloc(unsigned int dev_handle,
+ unsigned int dev_ino)
+{
+ unsigned long flags;
+ unsigned char ent;
+
+ BUILD_BUG_ON(NR_IRQS >= 256);
+
+ spin_lock_irqsave(&virt_irq_alloc_lock, flags);
+
+ for (ent = 1; ent < NR_IRQS; ent++) {
+ if (!virt_irq_table[ent].in_use)
+ break;
+ }
+ if (ent >= NR_IRQS) {
+ printk(KERN_ERR "IRQ: Out of virtual IRQs.\n");
+ ent = 0;
+ } else {
+ virt_irq_table[ent].dev_handle = dev_handle;
+ virt_irq_table[ent].dev_ino = dev_ino;
+ virt_irq_table[ent].in_use = 1;
+ }
+
+ spin_unlock_irqrestore(&virt_irq_alloc_lock, flags);
+
+ return ent;
+}
+
+#ifdef CONFIG_PCI_MSI
+void virt_irq_free(unsigned int virt_irq)
+{
+ unsigned long flags;
+
+ if (virt_irq >= NR_IRQS)
+ return;
+
+ spin_lock_irqsave(&virt_irq_alloc_lock, flags);
+
+ virt_irq_table[virt_irq].in_use = 0;
+
+ spin_unlock_irqrestore(&virt_irq_alloc_lock, flags);
+}
+#endif
+
+/*
+ * /proc/interrupts printing:
+ */
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+ int i = *(loff_t *) v, j;
+ struct irqaction * action;
+ unsigned long flags;
+
+ if (i == 0) {
+ seq_printf(p, " ");
+ for_each_online_cpu(j)
+ seq_printf(p, "CPU%d ",j);
+ seq_putc(p, '\n');
+ }
+
+ if (i < NR_IRQS) {
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
+ action = irq_desc[i].action;
+ if (!action)
+ goto skip;
+ seq_printf(p, "%3d: ",i);
+#ifndef CONFIG_SMP
+ seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+#endif
+ seq_printf(p, " %9s", irq_desc[i].chip->typename);
+ seq_printf(p, " %s", action->name);
+
+ for (action=action->next; action; action = action->next)
+ seq_printf(p, ", %s", action->name);
+
+ seq_putc(p, '\n');
+skip:
+ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+ }
+ return 0;
+}
+
+static unsigned int sun4u_compute_tid(unsigned long imap, unsigned long cpuid)
+{
+ unsigned int tid;
+
+ if (this_is_starfire) {
+ tid = starfire_translate(imap, cpuid);
+ tid <<= IMAP_TID_SHIFT;
+ tid &= IMAP_TID_UPA;
+ } else {
+ if (tlb_type == cheetah || tlb_type == cheetah_plus) {
+ unsigned long ver;
+
+ __asm__ ("rdpr %%ver, %0" : "=r" (ver));
+ if ((ver >> 32UL) == __JALAPENO_ID ||
+ (ver >> 32UL) == __SERRANO_ID) {
+ tid = cpuid << IMAP_TID_SHIFT;
+ tid &= IMAP_TID_JBUS;
+ } else {
+ unsigned int a = cpuid & 0x1f;
+ unsigned int n = (cpuid >> 5) & 0x1f;
+
+ tid = ((a << IMAP_AID_SHIFT) |
+ (n << IMAP_NID_SHIFT));
+ tid &= (IMAP_AID_SAFARI |
+ IMAP_NID_SAFARI);;
+ }
+ } else {
+ tid = cpuid << IMAP_TID_SHIFT;
+ tid &= IMAP_TID_UPA;
+ }
+ }
+
+ return tid;
+}
+
+struct irq_handler_data {
+ unsigned long iclr;
+ unsigned long imap;
+
+ void (*pre_handler)(unsigned int, void *, void *);
+ void *arg1;
+ void *arg2;
+};
+
+#ifdef CONFIG_SMP
+static int irq_choose_cpu(unsigned int virt_irq)
+{
+ cpumask_t mask = irq_desc[virt_irq].affinity;
+ int cpuid;
+
+ if (cpus_equal(mask, CPU_MASK_ALL)) {
+ static int irq_rover;
+ static DEFINE_SPINLOCK(irq_rover_lock);
+ unsigned long flags;
+
+ /* Round-robin distribution... */
+ do_round_robin:
+ spin_lock_irqsave(&irq_rover_lock, flags);
+
+ while (!cpu_online(irq_rover)) {
+ if (++irq_rover >= NR_CPUS)
+ irq_rover = 0;
+ }
+ cpuid = irq_rover;
+ do {
+ if (++irq_rover >= NR_CPUS)
+ irq_rover = 0;
+ } while (!cpu_online(irq_rover));
+
+ spin_unlock_irqrestore(&irq_rover_lock, flags);
+ } else {
+ cpumask_t tmp;
+
+ cpus_and(tmp, cpu_online_map, mask);
+
+ if (cpus_empty(tmp))
+ goto do_round_robin;
+
+ cpuid = first_cpu(tmp);
+ }
+
+ return cpuid;
+}
+#else
+static int irq_choose_cpu(unsigned int virt_irq)
+{
+ return real_hard_smp_processor_id();
+}
+#endif
+
+static void sun4u_irq_enable(unsigned int virt_irq)
+{
+ struct irq_handler_data *data = get_irq_chip_data(virt_irq);
+
+ if (likely(data)) {
+ unsigned long cpuid, imap, val;
+ unsigned int tid;
+
+ cpuid = irq_choose_cpu(virt_irq);
+ imap = data->imap;
+
+ tid = sun4u_compute_tid(imap, cpuid);
+
+ val = upa_readq(imap);
+ val &= ~(IMAP_TID_UPA | IMAP_TID_JBUS |
+ IMAP_AID_SAFARI | IMAP_NID_SAFARI);
+ val |= tid | IMAP_VALID;
+ upa_writeq(val, imap);
+ upa_writeq(ICLR_IDLE, data->iclr);
+ }
+}
+
- static void sun4v_set_affinity(unsigned int virt_irq, cpumask_t mask)
++static void sun4u_set_affinity(unsigned int virt_irq,
++ const struct cpumask *mask)
+{
+ sun4u_irq_enable(virt_irq);
+}
+
+static void sun4u_irq_disable(unsigned int virt_irq)
+{
+ struct irq_handler_data *data = get_irq_chip_data(virt_irq);
+
+ if (likely(data)) {
+ unsigned long imap = data->imap;
+ unsigned long tmp = upa_readq(imap);
+
+ tmp &= ~IMAP_VALID;
+ upa_writeq(tmp, imap);
+ }
+}
+
+static void sun4u_irq_eoi(unsigned int virt_irq)
+{
+ struct irq_handler_data *data = get_irq_chip_data(virt_irq);
+ struct irq_desc *desc = irq_desc + virt_irq;
+
+ if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ return;
+
+ if (likely(data))
+ upa_writeq(ICLR_IDLE, data->iclr);
+}
+
+static void sun4v_irq_enable(unsigned int virt_irq)
+{
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ unsigned long cpuid = irq_choose_cpu(virt_irq);
+ int err;
+
+ err = sun4v_intr_settarget(ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
+ "err(%d)\n", ino, cpuid, err);
+ err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setstate(%x): "
+ "err(%d)\n", ino, err);
+ err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setenabled(%x): err(%d)\n",
+ ino, err);
+}
+
- static void sun4v_virt_set_affinity(unsigned int virt_irq, cpumask_t mask)
++static void sun4v_set_affinity(unsigned int virt_irq,
++ const struct cpumask *mask)
+{
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ unsigned long cpuid = irq_choose_cpu(virt_irq);
+ int err;
+
+ err = sun4v_intr_settarget(ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): "
+ "err(%d)\n", ino, cpuid, err);
+}
+
+static void sun4v_irq_disable(unsigned int virt_irq)
+{
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ int err;
+
+ err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setenabled(%x): "
+ "err(%d)\n", ino, err);
+}
+
+static void sun4v_irq_eoi(unsigned int virt_irq)
+{
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+ struct irq_desc *desc = irq_desc + virt_irq;
+ int err;
+
+ if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ return;
+
+ err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_intr_setstate(%x): "
+ "err(%d)\n", ino, err);
+}
+
+static void sun4v_virq_enable(unsigned int virt_irq)
+{
+ unsigned long cpuid, dev_handle, dev_ino;
+ int err;
+
+ cpuid = irq_choose_cpu(virt_irq);
+
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
+
+ err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
+ "err(%d)\n",
+ dev_handle, dev_ino, cpuid, err);
+ err = sun4v_vintr_set_state(dev_handle, dev_ino,
+ HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_STATE_IDLE): err(%d)\n",
+ dev_handle, dev_ino, err);
+ err = sun4v_vintr_set_valid(dev_handle, dev_ino,
+ HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_ENABLED): err(%d)\n",
+ dev_handle, dev_ino, err);
+}
+
- irq_desc[irq].affinity);
++static void sun4v_virt_set_affinity(unsigned int virt_irq,
++ const struct cpumask *mask)
+{
+ unsigned long cpuid, dev_handle, dev_ino;
+ int err;
+
+ cpuid = irq_choose_cpu(virt_irq);
+
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
+
+ err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): "
+ "err(%d)\n",
+ dev_handle, dev_ino, cpuid, err);
+}
+
+static void sun4v_virq_disable(unsigned int virt_irq)
+{
+ unsigned long dev_handle, dev_ino;
+ int err;
+
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
+
+ err = sun4v_vintr_set_valid(dev_handle, dev_ino,
+ HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_DISABLED): err(%d)\n",
+ dev_handle, dev_ino, err);
+}
+
+static void sun4v_virq_eoi(unsigned int virt_irq)
+{
+ struct irq_desc *desc = irq_desc + virt_irq;
+ unsigned long dev_handle, dev_ino;
+ int err;
+
+ if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ return;
+
+ dev_handle = virt_irq_table[virt_irq].dev_handle;
+ dev_ino = virt_irq_table[virt_irq].dev_ino;
+
+ err = sun4v_vintr_set_state(dev_handle, dev_ino,
+ HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx,"
+ "HV_INTR_STATE_IDLE): err(%d)\n",
+ dev_handle, dev_ino, err);
+}
+
+static struct irq_chip sun4u_irq = {
+ .typename = "sun4u",
+ .enable = sun4u_irq_enable,
+ .disable = sun4u_irq_disable,
+ .eoi = sun4u_irq_eoi,
+ .set_affinity = sun4u_set_affinity,
+};
+
+static struct irq_chip sun4v_irq = {
+ .typename = "sun4v",
+ .enable = sun4v_irq_enable,
+ .disable = sun4v_irq_disable,
+ .eoi = sun4v_irq_eoi,
+ .set_affinity = sun4v_set_affinity,
+};
+
+static struct irq_chip sun4v_virq = {
+ .typename = "vsun4v",
+ .enable = sun4v_virq_enable,
+ .disable = sun4v_virq_disable,
+ .eoi = sun4v_virq_eoi,
+ .set_affinity = sun4v_virt_set_affinity,
+};
+
+static void pre_flow_handler(unsigned int virt_irq,
+ struct irq_desc *desc)
+{
+ struct irq_handler_data *data = get_irq_chip_data(virt_irq);
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+
+ data->pre_handler(ino, data->arg1, data->arg2);
+
+ handle_fasteoi_irq(virt_irq, desc);
+}
+
+void irq_install_pre_handler(int virt_irq,
+ void (*func)(unsigned int, void *, void *),
+ void *arg1, void *arg2)
+{
+ struct irq_handler_data *data = get_irq_chip_data(virt_irq);
+ struct irq_desc *desc = irq_desc + virt_irq;
+
+ data->pre_handler = func;
+ data->arg1 = arg1;
+ data->arg2 = arg2;
+
+ desc->handle_irq = pre_flow_handler;
+}
+
+unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap)
+{
+ struct ino_bucket *bucket;
+ struct irq_handler_data *data;
+ unsigned int virt_irq;
+ int ino;
+
+ BUG_ON(tlb_type == hypervisor);
+
+ ino = (upa_readq(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
+ bucket = &ivector_table[ino];
+ virt_irq = bucket_get_virt_irq(__pa(bucket));
+ if (!virt_irq) {
+ virt_irq = virt_irq_alloc(0, ino);
+ bucket_set_virt_irq(__pa(bucket), virt_irq);
+ set_irq_chip_and_handler_name(virt_irq,
+ &sun4u_irq,
+ handle_fasteoi_irq,
+ "IVEC");
+ }
+
+ data = get_irq_chip_data(virt_irq);
+ if (unlikely(data))
+ goto out;
+
+ data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+ if (unlikely(!data)) {
+ prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
+ prom_halt();
+ }
+ set_irq_chip_data(virt_irq, data);
+
+ data->imap = imap;
+ data->iclr = iclr;
+
+out:
+ return virt_irq;
+}
+
+static unsigned int sun4v_build_common(unsigned long sysino,
+ struct irq_chip *chip)
+{
+ struct ino_bucket *bucket;
+ struct irq_handler_data *data;
+ unsigned int virt_irq;
+
+ BUG_ON(tlb_type != hypervisor);
+
+ bucket = &ivector_table[sysino];
+ virt_irq = bucket_get_virt_irq(__pa(bucket));
+ if (!virt_irq) {
+ virt_irq = virt_irq_alloc(0, sysino);
+ bucket_set_virt_irq(__pa(bucket), virt_irq);
+ set_irq_chip_and_handler_name(virt_irq, chip,
+ handle_fasteoi_irq,
+ "IVEC");
+ }
+
+ data = get_irq_chip_data(virt_irq);
+ if (unlikely(data))
+ goto out;
+
+ data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+ if (unlikely(!data)) {
+ prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
+ prom_halt();
+ }
+ set_irq_chip_data(virt_irq, data);
+
+ /* Catch accidental accesses to these things. IMAP/ICLR handling
+ * is done by hypervisor calls on sun4v platforms, not by direct
+ * register accesses.
+ */
+ data->imap = ~0UL;
+ data->iclr = ~0UL;
+
+out:
+ return virt_irq;
+}
+
+unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
+{
+ unsigned long sysino = sun4v_devino_to_sysino(devhandle, devino);
+
+ return sun4v_build_common(sysino, &sun4v_irq);
+}
+
+unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino)
+{
+ struct irq_handler_data *data;
+ unsigned long hv_err, cookie;
+ struct ino_bucket *bucket;
+ struct irq_desc *desc;
+ unsigned int virt_irq;
+
+ bucket = kzalloc(sizeof(struct ino_bucket), GFP_ATOMIC);
+ if (unlikely(!bucket))
+ return 0;
+ __flush_dcache_range((unsigned long) bucket,
+ ((unsigned long) bucket +
+ sizeof(struct ino_bucket)));
+
+ virt_irq = virt_irq_alloc(devhandle, devino);
+ bucket_set_virt_irq(__pa(bucket), virt_irq);
+
+ set_irq_chip_and_handler_name(virt_irq, &sun4v_virq,
+ handle_fasteoi_irq,
+ "IVEC");
+
+ data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+ if (unlikely(!data))
+ return 0;
+
+ /* In order to make the LDC channel startup sequence easier,
+ * especially wrt. locking, we do not let request_irq() enable
+ * the interrupt.
+ */
+ desc = irq_desc + virt_irq;
+ desc->status |= IRQ_NOAUTOEN;
+
+ set_irq_chip_data(virt_irq, data);
+
+ /* Catch accidental accesses to these things. IMAP/ICLR handling
+ * is done by hypervisor calls on sun4v platforms, not by direct
+ * register accesses.
+ */
+ data->imap = ~0UL;
+ data->iclr = ~0UL;
+
+ cookie = ~__pa(bucket);
+ hv_err = sun4v_vintr_set_cookie(devhandle, devino, cookie);
+ if (hv_err) {
+ prom_printf("IRQ: Fatal, cannot set cookie for [%x:%x] "
+ "err=%lu\n", devhandle, devino, hv_err);
+ prom_halt();
+ }
+
+ return virt_irq;
+}
+
+void ack_bad_irq(unsigned int virt_irq)
+{
+ unsigned int ino = virt_irq_table[virt_irq].dev_ino;
+
+ if (!ino)
+ ino = 0xdeadbeef;
+
+ printk(KERN_CRIT "Unexpected IRQ from ino[%x] virt_irq[%u]\n",
+ ino, virt_irq);
+}
+
+void *hardirq_stack[NR_CPUS];
+void *softirq_stack[NR_CPUS];
+
+static __attribute__((always_inline)) void *set_hardirq_stack(void)
+{
+ void *orig_sp, *sp = hardirq_stack[smp_processor_id()];
+
+ __asm__ __volatile__("mov %%sp, %0" : "=r" (orig_sp));
+ if (orig_sp < sp ||
+ orig_sp > (sp + THREAD_SIZE)) {
+ sp += THREAD_SIZE - 192 - STACK_BIAS;
+ __asm__ __volatile__("mov %0, %%sp" : : "r" (sp));
+ }
+
+ return orig_sp;
+}
+static __attribute__((always_inline)) void restore_hardirq_stack(void *orig_sp)
+{
+ __asm__ __volatile__("mov %0, %%sp" : : "r" (orig_sp));
+}
+
+void handler_irq(int irq, struct pt_regs *regs)
+{
+ unsigned long pstate, bucket_pa;
+ struct pt_regs *old_regs;
+ void *orig_sp;
+
+ clear_softint(1 << irq);
+
+ old_regs = set_irq_regs(regs);
+ irq_enter();
+
+ /* Grab an atomic snapshot of the pending IVECs. */
+ __asm__ __volatile__("rdpr %%pstate, %0\n\t"
+ "wrpr %0, %3, %%pstate\n\t"
+ "ldx [%2], %1\n\t"
+ "stx %%g0, [%2]\n\t"
+ "wrpr %0, 0x0, %%pstate\n\t"
+ : "=&r" (pstate), "=&r" (bucket_pa)
+ : "r" (irq_work_pa(smp_processor_id())),
+ "i" (PSTATE_IE)
+ : "memory");
+
+ orig_sp = set_hardirq_stack();
+
+ while (bucket_pa) {
+ struct irq_desc *desc;
+ unsigned long next_pa;
+ unsigned int virt_irq;
+
+ next_pa = bucket_get_chain_pa(bucket_pa);
+ virt_irq = bucket_get_virt_irq(bucket_pa);
+ bucket_clear_chain_pa(bucket_pa);
+
+ desc = irq_desc + virt_irq;
+
+ desc->handle_irq(virt_irq, desc);
+
+ bucket_pa = next_pa;
+ }
+
+ restore_hardirq_stack(orig_sp);
+
+ irq_exit();
+ set_irq_regs(old_regs);
+}
+
+void do_softirq(void)
+{
+ unsigned long flags;
+
+ if (in_interrupt())
+ return;
+
+ local_irq_save(flags);
+
+ if (local_softirq_pending()) {
+ void *orig_sp, *sp = softirq_stack[smp_processor_id()];
+
+ sp += THREAD_SIZE - 192 - STACK_BIAS;
+
+ __asm__ __volatile__("mov %%sp, %0\n\t"
+ "mov %1, %%sp"
+ : "=&r" (orig_sp)
+ : "r" (sp));
+ __do_softirq();
+ __asm__ __volatile__("mov %0, %%sp"
+ : : "r" (orig_sp));
+ }
+
+ local_irq_restore(flags);
+}
+
+static void unhandled_perf_irq(struct pt_regs *regs)
+{
+ unsigned long pcr, pic;
+
+ read_pcr(pcr);
+ read_pic(pic);
+
+ write_pcr(0);
+
+ printk(KERN_EMERG "CPU %d: Got unexpected perf counter IRQ.\n",
+ smp_processor_id());
+ printk(KERN_EMERG "CPU %d: PCR[%016lx] PIC[%016lx]\n",
+ smp_processor_id(), pcr, pic);
+}
+
+/* Almost a direct copy of the powerpc PMC code. */
+static DEFINE_SPINLOCK(perf_irq_lock);
+static void *perf_irq_owner_caller; /* mostly for debugging */
+static void (*perf_irq)(struct pt_regs *regs) = unhandled_perf_irq;
+
+/* Invoked from level 15 PIL handler in trap table. */
+void perfctr_irq(int irq, struct pt_regs *regs)
+{
+ clear_softint(1 << irq);
+ perf_irq(regs);
+}
+
+int register_perfctr_intr(void (*handler)(struct pt_regs *))
+{
+ int ret;
+
+ if (!handler)
+ return -EINVAL;
+
+ spin_lock(&perf_irq_lock);
+ if (perf_irq != unhandled_perf_irq) {
+ printk(KERN_WARNING "register_perfctr_intr: "
+ "perf IRQ busy (reserved by caller %p)\n",
+ perf_irq_owner_caller);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ perf_irq_owner_caller = __builtin_return_address(0);
+ perf_irq = handler;
+
+ ret = 0;
+out:
+ spin_unlock(&perf_irq_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(register_perfctr_intr);
+
+void release_perfctr_intr(void (*handler)(struct pt_regs *))
+{
+ spin_lock(&perf_irq_lock);
+ perf_irq_owner_caller = NULL;
+ perf_irq = unhandled_perf_irq;
+ spin_unlock(&perf_irq_lock);
+}
+EXPORT_SYMBOL_GPL(release_perfctr_intr);
+
+#ifdef CONFIG_HOTPLUG_CPU
+void fixup_irqs(void)
+{
+ unsigned int irq;
+
+ for (irq = 0; irq < NR_IRQS; irq++) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&irq_desc[irq].lock, flags);
+ if (irq_desc[irq].action &&
+ !(irq_desc[irq].status & IRQ_PER_CPU)) {
+ if (irq_desc[irq].chip->set_affinity)
+ irq_desc[irq].chip->set_affinity(irq,
++ &irq_desc[irq].affinity);
+ }
+ spin_unlock_irqrestore(&irq_desc[irq].lock, flags);
+ }
+
+ tick_ops->disable_irq();
+}
+#endif
+
+struct sun5_timer {
+ u64 count0;
+ u64 limit0;
+ u64 count1;
+ u64 limit1;
+};
+
+static struct sun5_timer *prom_timers;
+static u64 prom_limit0, prom_limit1;
+
+static void map_prom_timers(void)
+{
+ struct device_node *dp;
+ const unsigned int *addr;
+
+ /* PROM timer node hangs out in the top level of device siblings... */
+ dp = of_find_node_by_path("/");
+ dp = dp->child;
+ while (dp) {
+ if (!strcmp(dp->name, "counter-timer"))
+ break;
+ dp = dp->sibling;
+ }
+
+ /* Assume if node is not present, PROM uses different tick mechanism
+ * which we should not care about.
+ */
+ if (!dp) {
+ prom_timers = (struct sun5_timer *) 0;
+ return;
+ }
+
+ /* If PROM is really using this, it must be mapped by him. */
+ addr = of_get_property(dp, "address", NULL);
+ if (!addr) {
+ prom_printf("PROM does not have timer mapped, trying to continue.\n");
+ prom_timers = (struct sun5_timer *) 0;
+ return;
+ }
+ prom_timers = (struct sun5_timer *) ((unsigned long)addr[0]);
+}
+
+static void kill_prom_timer(void)
+{
+ if (!prom_timers)
+ return;
+
+ /* Save them away for later. */
+ prom_limit0 = prom_timers->limit0;
+ prom_limit1 = prom_timers->limit1;
+
+ /* Just as in sun4c/sun4m PROM uses timer which ticks at IRQ 14.
+ * We turn both off here just to be paranoid.
+ */
+ prom_timers->limit0 = 0;
+ prom_timers->limit1 = 0;
+
+ /* Wheee, eat the interrupt packet too... */
+ __asm__ __volatile__(
+" mov 0x40, %%g2\n"
+" ldxa [%%g0] %0, %%g1\n"
+" ldxa [%%g2] %1, %%g1\n"
+" stxa %%g0, [%%g0] %0\n"
+" membar #Sync\n"
+ : /* no outputs */
+ : "i" (ASI_INTR_RECEIVE), "i" (ASI_INTR_R)
+ : "g1", "g2");
+}
+
+void notrace init_irqwork_curcpu(void)
+{
+ int cpu = hard_smp_processor_id();
+
+ trap_block[cpu].irq_worklist_pa = 0UL;
+}
+
+/* Please be very careful with register_one_mondo() and
+ * sun4v_register_mondo_queues().
+ *
+ * On SMP this gets invoked from the CPU trampoline before
+ * the cpu has fully taken over the trap table from OBP,
+ * and it's kernel stack + %g6 thread register state is
+ * not fully cooked yet.
+ *
+ * Therefore you cannot make any OBP calls, not even prom_printf,
+ * from these two routines.
+ */
+static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type, unsigned long qmask)
+{
+ unsigned long num_entries = (qmask + 1) / 64;
+ unsigned long status;
+
+ status = sun4v_cpu_qconf(type, paddr, num_entries);
+ if (status != HV_EOK) {
+ prom_printf("SUN4V: sun4v_cpu_qconf(%lu:%lx:%lu) failed, "
+ "err %lu\n", type, paddr, num_entries, status);
+ prom_halt();
+ }
+}
+
+void __cpuinit notrace sun4v_register_mondo_queues(int this_cpu)
+{
+ struct trap_per_cpu *tb = &trap_block[this_cpu];
+
+ register_one_mondo(tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO,
+ tb->cpu_mondo_qmask);
+ register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO,
+ tb->dev_mondo_qmask);
+ register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR,
+ tb->resum_qmask);
+ register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR,
+ tb->nonresum_qmask);
+}
+
+static void __init alloc_one_mondo(unsigned long *pa_ptr, unsigned long qmask)
+{
+ unsigned long size = PAGE_ALIGN(qmask + 1);
+ void *p = __alloc_bootmem(size, size, 0);
+ if (!p) {
+ prom_printf("SUN4V: Error, cannot allocate mondo queue.\n");
+ prom_halt();
+ }
+
+ *pa_ptr = __pa(p);
+}
+
+static void __init alloc_one_kbuf(unsigned long *pa_ptr, unsigned long qmask)
+{
+ unsigned long size = PAGE_ALIGN(qmask + 1);
+ void *p = __alloc_bootmem(size, size, 0);
+
+ if (!p) {
+ prom_printf("SUN4V: Error, cannot allocate kbuf page.\n");
+ prom_halt();
+ }
+
+ *pa_ptr = __pa(p);
+}
+
+static void __init init_cpu_send_mondo_info(struct trap_per_cpu *tb)
+{
+#ifdef CONFIG_SMP
+ void *page;
+
+ BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64));
+
+ page = alloc_bootmem_pages(PAGE_SIZE);
+ if (!page) {
+ prom_printf("SUN4V: Error, cannot allocate cpu mondo page.\n");
+ prom_halt();
+ }
+
+ tb->cpu_mondo_block_pa = __pa(page);
+ tb->cpu_list_pa = __pa(page + 64);
+#endif
+}
+
+/* Allocate mondo and error queues for all possible cpus. */
+static void __init sun4v_init_mondo_queues(void)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ struct trap_per_cpu *tb = &trap_block[cpu];
+
+ alloc_one_mondo(&tb->cpu_mondo_pa, tb->cpu_mondo_qmask);
+ alloc_one_mondo(&tb->dev_mondo_pa, tb->dev_mondo_qmask);
+ alloc_one_mondo(&tb->resum_mondo_pa, tb->resum_qmask);
+ alloc_one_kbuf(&tb->resum_kernel_buf_pa, tb->resum_qmask);
+ alloc_one_mondo(&tb->nonresum_mondo_pa, tb->nonresum_qmask);
+ alloc_one_kbuf(&tb->nonresum_kernel_buf_pa,
+ tb->nonresum_qmask);
+ }
+}
+
+static void __init init_send_mondo_info(void)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ struct trap_per_cpu *tb = &trap_block[cpu];
+
+ init_cpu_send_mondo_info(tb);
+ }
+}
+
+static struct irqaction timer_irq_action = {
+ .name = "timer",
+};
+
+/* Only invoked on boot processor. */
+void __init init_IRQ(void)
+{
+ unsigned long size;
+
+ map_prom_timers();
+ kill_prom_timer();
+
+ size = sizeof(struct ino_bucket) * NUM_IVECS;
+ ivector_table = alloc_bootmem(size);
+ if (!ivector_table) {
+ prom_printf("Fatal error, cannot allocate ivector_table\n");
+ prom_halt();
+ }
+ __flush_dcache_range((unsigned long) ivector_table,
+ ((unsigned long) ivector_table) + size);
+
+ ivector_table_pa = __pa(ivector_table);
+
+ if (tlb_type == hypervisor)
+ sun4v_init_mondo_queues();
+
+ init_send_mondo_info();
+
+ if (tlb_type == hypervisor) {
+ /* Load up the boot cpu's entries. */
+ sun4v_register_mondo_queues(hard_smp_processor_id());
+ }
+
+ /* 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.
+ */
+ clear_softint(get_softint());
+
+ /* Now that ivector table is initialized, it is safe
+ * to receive IRQ vector traps. We will normally take
+ * one or two right now, in case some device PROM used
+ * to boot us wants to speak to us. We just ignore them.
+ */
+ __asm__ __volatile__("rdpr %%pstate, %%g1\n\t"
+ "or %%g1, %0, %%g1\n\t"
+ "wrpr %%g1, 0x0, %%pstate"
+ : /* No outputs */
+ : "i" (PSTATE_IE)
+ : "g1");
+
+ irq_desc[0].action = &timer_irq_action;
+}
--- /dev/null
- irq_set_affinity(irq, numa_mask);
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/irq.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+
+void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
+{
+ unsigned long ret = res->start + offset;
+ struct resource *r;
+
+ if (res->flags & IORESOURCE_MEM)
+ r = request_mem_region(ret, size, name);
+ else
+ r = request_region(ret, size, name);
+ if (!r)
+ ret = 0;
+
+ return (void __iomem *) ret;
+}
+EXPORT_SYMBOL(of_ioremap);
+
+void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
+{
+ if (res->flags & IORESOURCE_MEM)
+ release_mem_region((unsigned long) base, size);
+ else
+ release_region((unsigned long) base, size);
+}
+EXPORT_SYMBOL(of_iounmap);
+
+static int node_match(struct device *dev, void *data)
+{
+ struct of_device *op = to_of_device(dev);
+ struct device_node *dp = data;
+
+ return (op->node == dp);
+}
+
+struct of_device *of_find_device_by_node(struct device_node *dp)
+{
+ struct device *dev = bus_find_device(&of_platform_bus_type, NULL,
+ dp, node_match);
+
+ if (dev)
+ return to_of_device(dev);
+
+ return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_node);
+
+unsigned int irq_of_parse_and_map(struct device_node *node, int index)
+{
+ struct of_device *op = of_find_device_by_node(node);
+
+ if (!op || index >= op->num_irqs)
+ return 0;
+
+ return op->irqs[index];
+}
+EXPORT_SYMBOL(irq_of_parse_and_map);
+
+/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
+ * BUS and propagate to all child of_device objects.
+ */
+void of_propagate_archdata(struct of_device *bus)
+{
+ struct dev_archdata *bus_sd = &bus->dev.archdata;
+ struct device_node *bus_dp = bus->node;
+ struct device_node *dp;
+
+ for (dp = bus_dp->child; dp; dp = dp->sibling) {
+ struct of_device *op = of_find_device_by_node(dp);
+
+ op->dev.archdata.iommu = bus_sd->iommu;
+ op->dev.archdata.stc = bus_sd->stc;
+ op->dev.archdata.host_controller = bus_sd->host_controller;
+ op->dev.archdata.numa_node = bus_sd->numa_node;
+
+ if (dp->child)
+ of_propagate_archdata(op);
+ }
+}
+
+struct bus_type of_platform_bus_type;
+EXPORT_SYMBOL(of_platform_bus_type);
+
+static inline u64 of_read_addr(const u32 *cell, int size)
+{
+ u64 r = 0;
+ while (size--)
+ r = (r << 32) | *(cell++);
+ return r;
+}
+
+static void __init get_cells(struct device_node *dp,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = of_n_addr_cells(dp);
+ if (sizec)
+ *sizec = of_n_size_cells(dp);
+}
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS 4
+
+struct of_bus {
+ const char *name;
+ const char *addr_prop_name;
+ int (*match)(struct device_node *parent);
+ void (*count_cells)(struct device_node *child,
+ int *addrc, int *sizec);
+ int (*map)(u32 *addr, const u32 *range,
+ int na, int ns, int pna);
+ unsigned long (*get_flags)(const u32 *addr, unsigned long);
+};
+
+/*
+ * Default translator (generic bus)
+ */
+
+static void of_bus_default_count_cells(struct device_node *dev,
+ int *addrc, int *sizec)
+{
+ get_cells(dev, addrc, sizec);
+}
+
+/* Make sure the least significant 64-bits are in-range. Even
+ * for 3 or 4 cell values it is a good enough approximation.
+ */
+static int of_out_of_range(const u32 *addr, const u32 *base,
+ const u32 *size, int na, int ns)
+{
+ u64 a = of_read_addr(addr, na);
+ u64 b = of_read_addr(base, na);
+
+ if (a < b)
+ return 1;
+
+ b += of_read_addr(size, ns);
+ if (a >= b)
+ return 1;
+
+ return 0;
+}
+
+static int of_bus_default_map(u32 *addr, const u32 *range,
+ int na, int ns, int pna)
+{
+ u32 result[OF_MAX_ADDR_CELLS];
+ int i;
+
+ if (ns > 2) {
+ printk("of_device: Cannot handle size cells (%d) > 2.", ns);
+ return -EINVAL;
+ }
+
+ if (of_out_of_range(addr, range, range + na + pna, na, ns))
+ return -EINVAL;
+
+ /* Start with the parent range base. */
+ memcpy(result, range + na, pna * 4);
+
+ /* Add in the child address offset. */
+ for (i = 0; i < na; i++)
+ result[pna - 1 - i] +=
+ (addr[na - 1 - i] -
+ range[na - 1 - i]);
+
+ memcpy(addr, result, pna * 4);
+
+ return 0;
+}
+
+static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
+{
+ if (flags)
+ return flags;
+ return IORESOURCE_MEM;
+}
+
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+ if (!strcmp(np->name, "pci")) {
+ const char *model = of_get_property(np, "model", NULL);
+
+ if (model && !strcmp(model, "SUNW,simba"))
+ return 0;
+
+ /* Do not do PCI specific frobbing if the
+ * PCI bridge lacks a ranges property. We
+ * want to pass it through up to the next
+ * parent as-is, not with the PCI translate
+ * method which chops off the top address cell.
+ */
+ if (!of_find_property(np, "ranges", NULL))
+ return 0;
+
+ return 1;
+ }
+
+ return 0;
+}
+
+static int of_bus_simba_match(struct device_node *np)
+{
+ const char *model = of_get_property(np, "model", NULL);
+
+ if (model && !strcmp(model, "SUNW,simba"))
+ return 1;
+
+ /* Treat PCI busses lacking ranges property just like
+ * simba.
+ */
+ if (!strcmp(np->name, "pci")) {
+ if (!of_find_property(np, "ranges", NULL))
+ return 1;
+ }
+
+ return 0;
+}
+
+static int of_bus_simba_map(u32 *addr, const u32 *range,
+ int na, int ns, int pna)
+{
+ return 0;
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = 3;
+ if (sizec)
+ *sizec = 2;
+}
+
+static int of_bus_pci_map(u32 *addr, const u32 *range,
+ int na, int ns, int pna)
+{
+ u32 result[OF_MAX_ADDR_CELLS];
+ int i;
+
+ /* Check address type match */
+ if ((addr[0] ^ range[0]) & 0x03000000)
+ return -EINVAL;
+
+ if (of_out_of_range(addr + 1, range + 1, range + na + pna,
+ na - 1, ns))
+ return -EINVAL;
+
+ /* Start with the parent range base. */
+ memcpy(result, range + na, pna * 4);
+
+ /* Add in the child address offset, skipping high cell. */
+ for (i = 0; i < na - 1; i++)
+ result[pna - 1 - i] +=
+ (addr[na - 1 - i] -
+ range[na - 1 - i]);
+
+ memcpy(addr, result, pna * 4);
+
+ return 0;
+}
+
+static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
+{
+ u32 w = addr[0];
+
+ /* For PCI, we override whatever child busses may have used. */
+ flags = 0;
+ switch((w >> 24) & 0x03) {
+ case 0x01:
+ flags |= IORESOURCE_IO;
+ break;
+
+ case 0x02: /* 32 bits */
+ case 0x03: /* 64 bits */
+ flags |= IORESOURCE_MEM;
+ break;
+ }
+ if (w & 0x40000000)
+ flags |= IORESOURCE_PREFETCH;
+ return flags;
+}
+
+/*
+ * SBUS bus specific translator
+ */
+
+static int of_bus_sbus_match(struct device_node *np)
+{
+ return !strcmp(np->name, "sbus") ||
+ !strcmp(np->name, "sbi");
+}
+
+static void of_bus_sbus_count_cells(struct device_node *child,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = 2;
+ if (sizec)
+ *sizec = 1;
+}
+
+/*
+ * FHC/Central bus specific translator.
+ *
+ * This is just needed to hard-code the address and size cell
+ * counts. 'fhc' and 'central' nodes lack the #address-cells and
+ * #size-cells properties, and if you walk to the root on such
+ * Enterprise boxes all you'll get is a #size-cells of 2 which is
+ * not what we want to use.
+ */
+static int of_bus_fhc_match(struct device_node *np)
+{
+ return !strcmp(np->name, "fhc") ||
+ !strcmp(np->name, "central");
+}
+
+#define of_bus_fhc_count_cells of_bus_sbus_count_cells
+
+/*
+ * Array of bus specific translators
+ */
+
+static struct of_bus of_busses[] = {
+ /* PCI */
+ {
+ .name = "pci",
+ .addr_prop_name = "assigned-addresses",
+ .match = of_bus_pci_match,
+ .count_cells = of_bus_pci_count_cells,
+ .map = of_bus_pci_map,
+ .get_flags = of_bus_pci_get_flags,
+ },
+ /* SIMBA */
+ {
+ .name = "simba",
+ .addr_prop_name = "assigned-addresses",
+ .match = of_bus_simba_match,
+ .count_cells = of_bus_pci_count_cells,
+ .map = of_bus_simba_map,
+ .get_flags = of_bus_pci_get_flags,
+ },
+ /* SBUS */
+ {
+ .name = "sbus",
+ .addr_prop_name = "reg",
+ .match = of_bus_sbus_match,
+ .count_cells = of_bus_sbus_count_cells,
+ .map = of_bus_default_map,
+ .get_flags = of_bus_default_get_flags,
+ },
+ /* FHC */
+ {
+ .name = "fhc",
+ .addr_prop_name = "reg",
+ .match = of_bus_fhc_match,
+ .count_cells = of_bus_fhc_count_cells,
+ .map = of_bus_default_map,
+ .get_flags = of_bus_default_get_flags,
+ },
+ /* Default */
+ {
+ .name = "default",
+ .addr_prop_name = "reg",
+ .match = NULL,
+ .count_cells = of_bus_default_count_cells,
+ .map = of_bus_default_map,
+ .get_flags = of_bus_default_get_flags,
+ },
+};
+
+static struct of_bus *of_match_bus(struct device_node *np)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
+ if (!of_busses[i].match || of_busses[i].match(np))
+ return &of_busses[i];
+ BUG();
+ return NULL;
+}
+
+static int __init build_one_resource(struct device_node *parent,
+ struct of_bus *bus,
+ struct of_bus *pbus,
+ u32 *addr,
+ int na, int ns, int pna)
+{
+ const u32 *ranges;
+ int rone, rlen;
+
+ ranges = of_get_property(parent, "ranges", &rlen);
+ if (ranges == NULL || rlen == 0) {
+ u32 result[OF_MAX_ADDR_CELLS];
+ int i;
+
+ memset(result, 0, pna * 4);
+ for (i = 0; i < na; i++)
+ result[pna - 1 - i] =
+ addr[na - 1 - i];
+
+ memcpy(addr, result, pna * 4);
+ return 0;
+ }
+
+ /* Now walk through the ranges */
+ rlen /= 4;
+ rone = na + pna + ns;
+ for (; rlen >= rone; rlen -= rone, ranges += rone) {
+ if (!bus->map(addr, ranges, na, ns, pna))
+ return 0;
+ }
+
+ /* When we miss an I/O space match on PCI, just pass it up
+ * to the next PCI bridge and/or controller.
+ */
+ if (!strcmp(bus->name, "pci") &&
+ (addr[0] & 0x03000000) == 0x01000000)
+ return 0;
+
+ return 1;
+}
+
+static int __init use_1to1_mapping(struct device_node *pp)
+{
+ /* If we have a ranges property in the parent, use it. */
+ if (of_find_property(pp, "ranges", NULL) != NULL)
+ return 0;
+
+ /* If the parent is the dma node of an ISA bus, pass
+ * the translation up to the root.
+ *
+ * Some SBUS devices use intermediate nodes to express
+ * hierarchy within the device itself. These aren't
+ * real bus nodes, and don't have a 'ranges' property.
+ * But, we should still pass the translation work up
+ * to the SBUS itself.
+ */
+ if (!strcmp(pp->name, "dma") ||
+ !strcmp(pp->name, "espdma") ||
+ !strcmp(pp->name, "ledma") ||
+ !strcmp(pp->name, "lebuffer"))
+ return 0;
+
+ /* Similarly for all PCI bridges, if we get this far
+ * it lacks a ranges property, and this will include
+ * cases like Simba.
+ */
+ if (!strcmp(pp->name, "pci"))
+ return 0;
+
+ return 1;
+}
+
+static int of_resource_verbose;
+
+static void __init build_device_resources(struct of_device *op,
+ struct device *parent)
+{
+ struct of_device *p_op;
+ struct of_bus *bus;
+ int na, ns;
+ int index, num_reg;
+ const void *preg;
+
+ if (!parent)
+ return;
+
+ p_op = to_of_device(parent);
+ bus = of_match_bus(p_op->node);
+ bus->count_cells(op->node, &na, &ns);
+
+ preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
+ if (!preg || num_reg == 0)
+ return;
+
+ /* Convert to num-cells. */
+ num_reg /= 4;
+
+ /* Convert to num-entries. */
+ num_reg /= na + ns;
+
+ /* Prevent overrunning the op->resources[] array. */
+ if (num_reg > PROMREG_MAX) {
+ printk(KERN_WARNING "%s: Too many regs (%d), "
+ "limiting to %d.\n",
+ op->node->full_name, num_reg, PROMREG_MAX);
+ num_reg = PROMREG_MAX;
+ }
+
+ for (index = 0; index < num_reg; index++) {
+ struct resource *r = &op->resource[index];
+ u32 addr[OF_MAX_ADDR_CELLS];
+ const u32 *reg = (preg + (index * ((na + ns) * 4)));
+ struct device_node *dp = op->node;
+ struct device_node *pp = p_op->node;
+ struct of_bus *pbus, *dbus;
+ u64 size, result = OF_BAD_ADDR;
+ unsigned long flags;
+ int dna, dns;
+ int pna, pns;
+
+ size = of_read_addr(reg + na, ns);
+ memcpy(addr, reg, na * 4);
+
+ flags = bus->get_flags(addr, 0);
+
+ if (use_1to1_mapping(pp)) {
+ result = of_read_addr(addr, na);
+ goto build_res;
+ }
+
+ dna = na;
+ dns = ns;
+ dbus = bus;
+
+ while (1) {
+ dp = pp;
+ pp = dp->parent;
+ if (!pp) {
+ result = of_read_addr(addr, dna);
+ break;
+ }
+
+ pbus = of_match_bus(pp);
+ pbus->count_cells(dp, &pna, &pns);
+
+ if (build_one_resource(dp, dbus, pbus, addr,
+ dna, dns, pna))
+ break;
+
+ flags = pbus->get_flags(addr, flags);
+
+ dna = pna;
+ dns = pns;
+ dbus = pbus;
+ }
+
+ build_res:
+ memset(r, 0, sizeof(*r));
+
+ if (of_resource_verbose)
+ printk("%s reg[%d] -> %lx\n",
+ op->node->full_name, index,
+ result);
+
+ if (result != OF_BAD_ADDR) {
+ if (tlb_type == hypervisor)
+ result &= 0x0fffffffffffffffUL;
+
+ r->start = result;
+ r->end = result + size - 1;
+ r->flags = flags;
+ }
+ r->name = op->node->name;
+ }
+}
+
+static struct device_node * __init
+apply_interrupt_map(struct device_node *dp, struct device_node *pp,
+ const u32 *imap, int imlen, const u32 *imask,
+ unsigned int *irq_p)
+{
+ struct device_node *cp;
+ unsigned int irq = *irq_p;
+ struct of_bus *bus;
+ phandle handle;
+ const u32 *reg;
+ int na, num_reg, i;
+
+ bus = of_match_bus(pp);
+ bus->count_cells(dp, &na, NULL);
+
+ reg = of_get_property(dp, "reg", &num_reg);
+ if (!reg || !num_reg)
+ return NULL;
+
+ imlen /= ((na + 3) * 4);
+ handle = 0;
+ for (i = 0; i < imlen; i++) {
+ int j;
+
+ for (j = 0; j < na; j++) {
+ if ((reg[j] & imask[j]) != imap[j])
+ goto next;
+ }
+ if (imap[na] == irq) {
+ handle = imap[na + 1];
+ irq = imap[na + 2];
+ break;
+ }
+
+ next:
+ imap += (na + 3);
+ }
+ if (i == imlen) {
+ /* Psycho and Sabre PCI controllers can have 'interrupt-map'
+ * properties that do not include the on-board device
+ * interrupts. Instead, the device's 'interrupts' property
+ * is already a fully specified INO value.
+ *
+ * Handle this by deciding that, if we didn't get a
+ * match in the parent's 'interrupt-map', and the
+ * parent is an IRQ translater, then use the parent as
+ * our IRQ controller.
+ */
+ if (pp->irq_trans)
+ return pp;
+
+ return NULL;
+ }
+
+ *irq_p = irq;
+ cp = of_find_node_by_phandle(handle);
+
+ return cp;
+}
+
+static unsigned int __init pci_irq_swizzle(struct device_node *dp,
+ struct device_node *pp,
+ unsigned int irq)
+{
+ const struct linux_prom_pci_registers *regs;
+ unsigned int bus, devfn, slot, ret;
+
+ if (irq < 1 || irq > 4)
+ return irq;
+
+ regs = of_get_property(dp, "reg", NULL);
+ if (!regs)
+ return irq;
+
+ bus = (regs->phys_hi >> 16) & 0xff;
+ devfn = (regs->phys_hi >> 8) & 0xff;
+ slot = (devfn >> 3) & 0x1f;
+
+ if (pp->irq_trans) {
+ /* Derived from Table 8-3, U2P User's Manual. This branch
+ * is handling a PCI controller that lacks a proper set of
+ * interrupt-map and interrupt-map-mask properties. The
+ * Ultra-E450 is one example.
+ *
+ * The bit layout is BSSLL, where:
+ * B: 0 on bus A, 1 on bus B
+ * D: 2-bit slot number, derived from PCI device number as
+ * (dev - 1) for bus A, or (dev - 2) for bus B
+ * L: 2-bit line number
+ */
+ if (bus & 0x80) {
+ /* PBM-A */
+ bus = 0x00;
+ slot = (slot - 1) << 2;
+ } else {
+ /* PBM-B */
+ bus = 0x10;
+ slot = (slot - 2) << 2;
+ }
+ irq -= 1;
+
+ ret = (bus | slot | irq);
+ } else {
+ /* Going through a PCI-PCI bridge that lacks a set of
+ * interrupt-map and interrupt-map-mask properties.
+ */
+ ret = ((irq - 1 + (slot & 3)) & 3) + 1;
+ }
+
+ return ret;
+}
+
+static int of_irq_verbose;
+
+static unsigned int __init build_one_device_irq(struct of_device *op,
+ struct device *parent,
+ unsigned int irq)
+{
+ struct device_node *dp = op->node;
+ struct device_node *pp, *ip;
+ unsigned int orig_irq = irq;
+ int nid;
+
+ if (irq == 0xffffffff)
+ return irq;
+
+ if (dp->irq_trans) {
+ irq = dp->irq_trans->irq_build(dp, irq,
+ dp->irq_trans->data);
+
+ if (of_irq_verbose)
+ printk("%s: direct translate %x --> %x\n",
+ dp->full_name, orig_irq, irq);
+
+ goto out;
+ }
+
+ /* Something more complicated. Walk up to the root, applying
+ * interrupt-map or bus specific translations, until we hit
+ * an IRQ translator.
+ *
+ * If we hit a bus type or situation we cannot handle, we
+ * stop and assume that the original IRQ number was in a
+ * format which has special meaning to it's immediate parent.
+ */
+ pp = dp->parent;
+ ip = NULL;
+ while (pp) {
+ const void *imap, *imsk;
+ int imlen;
+
+ imap = of_get_property(pp, "interrupt-map", &imlen);
+ imsk = of_get_property(pp, "interrupt-map-mask", NULL);
+ if (imap && imsk) {
+ struct device_node *iret;
+ int this_orig_irq = irq;
+
+ iret = apply_interrupt_map(dp, pp,
+ imap, imlen, imsk,
+ &irq);
+
+ if (of_irq_verbose)
+ printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
+ op->node->full_name,
+ pp->full_name, this_orig_irq,
+ (iret ? iret->full_name : "NULL"), irq);
+
+ if (!iret)
+ break;
+
+ if (iret->irq_trans) {
+ ip = iret;
+ break;
+ }
+ } else {
+ if (!strcmp(pp->name, "pci")) {
+ unsigned int this_orig_irq = irq;
+
+ irq = pci_irq_swizzle(dp, pp, irq);
+ if (of_irq_verbose)
+ printk("%s: PCI swizzle [%s] "
+ "%x --> %x\n",
+ op->node->full_name,
+ pp->full_name, this_orig_irq,
+ irq);
+
+ }
+
+ if (pp->irq_trans) {
+ ip = pp;
+ break;
+ }
+ }
+ dp = pp;
+ pp = pp->parent;
+ }
+ if (!ip)
+ return orig_irq;
+
+ irq = ip->irq_trans->irq_build(op->node, irq,
+ ip->irq_trans->data);
+ if (of_irq_verbose)
+ printk("%s: Apply IRQ trans [%s] %x --> %x\n",
+ op->node->full_name, ip->full_name, orig_irq, irq);
+
+out:
+ nid = of_node_to_nid(dp);
+ if (nid != -1) {
+ cpumask_t numa_mask = node_to_cpumask(nid);
+
++ irq_set_affinity(irq, &numa_mask);
+ }
+
+ return irq;
+}
+
+static struct of_device * __init scan_one_device(struct device_node *dp,
+ struct device *parent)
+{
+ struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
+ const unsigned int *irq;
+ struct dev_archdata *sd;
+ int len, i;
+
+ if (!op)
+ return NULL;
+
+ sd = &op->dev.archdata;
+ sd->prom_node = dp;
+ sd->op = op;
+
+ op->node = dp;
+
+ op->clock_freq = of_getintprop_default(dp, "clock-frequency",
+ (25*1000*1000));
+ op->portid = of_getintprop_default(dp, "upa-portid", -1);
+ if (op->portid == -1)
+ op->portid = of_getintprop_default(dp, "portid", -1);
+
+ irq = of_get_property(dp, "interrupts", &len);
+ if (irq) {
+ op->num_irqs = len / 4;
+
+ /* Prevent overrunning the op->irqs[] array. */
+ if (op->num_irqs > PROMINTR_MAX) {
+ printk(KERN_WARNING "%s: Too many irqs (%d), "
+ "limiting to %d.\n",
+ dp->full_name, op->num_irqs, PROMINTR_MAX);
+ op->num_irqs = PROMINTR_MAX;
+ }
+ memcpy(op->irqs, irq, op->num_irqs * 4);
+ } else {
+ op->num_irqs = 0;
+ }
+
+ build_device_resources(op, parent);
+ for (i = 0; i < op->num_irqs; i++)
+ op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]);
+
+ op->dev.parent = parent;
+ op->dev.bus = &of_platform_bus_type;
+ if (!parent)
+ dev_set_name(&op->dev, "root");
+ else
+ dev_set_name(&op->dev, "%08x", dp->node);
+
+ if (of_device_register(op)) {
+ printk("%s: Could not register of device.\n",
+ dp->full_name);
+ kfree(op);
+ op = NULL;
+ }
+
+ return op;
+}
+
+static void __init scan_tree(struct device_node *dp, struct device *parent)
+{
+ while (dp) {
+ struct of_device *op = scan_one_device(dp, parent);
+
+ if (op)
+ scan_tree(dp->child, &op->dev);
+
+ dp = dp->sibling;
+ }
+}
+
+static void __init scan_of_devices(void)
+{
+ struct device_node *root = of_find_node_by_path("/");
+ struct of_device *parent;
+
+ parent = scan_one_device(root, NULL);
+ if (!parent)
+ return;
+
+ scan_tree(root->child, &parent->dev);
+}
+
+static int __init of_bus_driver_init(void)
+{
+ int err;
+
+ err = of_bus_type_init(&of_platform_bus_type, "of");
+ if (!err)
+ scan_of_devices();
+
+ return err;
+}
+
+postcore_initcall(of_bus_driver_init);
+
+static int __init of_debug(char *str)
+{
+ int val = 0;
+
+ get_option(&str, &val);
+ if (val & 1)
+ of_resource_verbose = 1;
+ if (val & 2)
+ of_irq_verbose = 1;
+ return 1;
+}
+
+__setup("of_debug=", of_debug);
--- /dev/null
- cpumask_t cpu_possible_map __read_mostly = CPU_MASK_NONE;
- cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE;
+/* smp.c: Sparc64 SMP support.
+ *
+ * Copyright (C) 1997, 2007, 2008 David S. Miller (davem@davemloft.net)
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/threads.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/fs.h>
+#include <linux/seq_file.h>
+#include <linux/cache.h>
+#include <linux/jiffies.h>
+#include <linux/profile.h>
+#include <linux/lmb.h>
+#include <linux/cpu.h>
+
+#include <asm/head.h>
+#include <asm/ptrace.h>
+#include <asm/atomic.h>
+#include <asm/tlbflush.h>
+#include <asm/mmu_context.h>
+#include <asm/cpudata.h>
+#include <asm/hvtramp.h>
+#include <asm/io.h>
+#include <asm/timer.h>
+
+#include <asm/irq.h>
+#include <asm/irq_regs.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/oplib.h>
+#include <asm/uaccess.h>
+#include <asm/starfire.h>
+#include <asm/tlb.h>
+#include <asm/sections.h>
+#include <asm/prom.h>
+#include <asm/mdesc.h>
+#include <asm/ldc.h>
+#include <asm/hypervisor.h>
+
+int sparc64_multi_core __read_mostly;
+
- EXPORT_SYMBOL(cpu_possible_map);
- EXPORT_SYMBOL(cpu_online_map);
+DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE;
+cpumask_t cpu_core_map[NR_CPUS] __read_mostly =
+ { [0 ... NR_CPUS-1] = CPU_MASK_NONE };
+
+EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
+EXPORT_SYMBOL(cpu_core_map);
+
+static cpumask_t smp_commenced_mask;
+
+void smp_info(struct seq_file *m)
+{
+ int i;
+
+ seq_printf(m, "State:\n");
+ for_each_online_cpu(i)
+ seq_printf(m, "CPU%d:\t\tonline\n", i);
+}
+
+void smp_bogo(struct seq_file *m)
+{
+ int i;
+
+ for_each_online_cpu(i)
+ seq_printf(m,
+ "Cpu%dClkTck\t: %016lx\n",
+ i, cpu_data(i).clock_tick);
+}
+
+extern void setup_sparc64_timer(void);
+
+static volatile unsigned long callin_flag = 0;
+
+void __cpuinit smp_callin(void)
+{
+ int cpuid = hard_smp_processor_id();
+
+ __local_per_cpu_offset = __per_cpu_offset(cpuid);
+
+ if (tlb_type == hypervisor)
+ sun4v_ktsb_register();
+
+ __flush_tlb_all();
+
+ setup_sparc64_timer();
+
+ if (cheetah_pcache_forced_on)
+ cheetah_enable_pcache();
+
+ local_irq_enable();
+
+ callin_flag = 1;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "flush %%g6" : : : "memory");
+
+ /* Clear this or we will die instantly when we
+ * schedule back to this idler...
+ */
+ current_thread_info()->new_child = 0;
+
+ /* Attach to the address space of init_task. */
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+
+ /* inform the notifiers about the new cpu */
+ notify_cpu_starting(cpuid);
+
+ while (!cpu_isset(cpuid, smp_commenced_mask))
+ rmb();
+
+ ipi_call_lock();
+ cpu_set(cpuid, cpu_online_map);
+ ipi_call_unlock();
+
+ /* idle thread is expected to have preempt disabled */
+ preempt_disable();
+}
+
+void cpu_panic(void)
+{
+ printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
+ panic("SMP bolixed\n");
+}
+
+/* This tick register synchronization scheme is taken entirely from
+ * the ia64 port, see arch/ia64/kernel/smpboot.c for details and credit.
+ *
+ * The only change I've made is to rework it so that the master
+ * initiates the synchonization instead of the slave. -DaveM
+ */
+
+#define MASTER 0
+#define SLAVE (SMP_CACHE_BYTES/sizeof(unsigned long))
+
+#define NUM_ROUNDS 64 /* magic value */
+#define NUM_ITERS 5 /* likewise */
+
+static DEFINE_SPINLOCK(itc_sync_lock);
+static unsigned long go[SLAVE + 1];
+
+#define DEBUG_TICK_SYNC 0
+
+static inline long get_delta (long *rt, long *master)
+{
+ unsigned long best_t0 = 0, best_t1 = ~0UL, best_tm = 0;
+ unsigned long tcenter, t0, t1, tm;
+ unsigned long i;
+
+ for (i = 0; i < NUM_ITERS; i++) {
+ t0 = tick_ops->get_tick();
+ go[MASTER] = 1;
+ membar_safe("#StoreLoad");
+ while (!(tm = go[SLAVE]))
+ rmb();
+ go[SLAVE] = 0;
+ wmb();
+ t1 = tick_ops->get_tick();
+
+ if (t1 - t0 < best_t1 - best_t0)
+ best_t0 = t0, best_t1 = t1, best_tm = tm;
+ }
+
+ *rt = best_t1 - best_t0;
+ *master = best_tm - best_t0;
+
+ /* average best_t0 and best_t1 without overflow: */
+ tcenter = (best_t0/2 + best_t1/2);
+ if (best_t0 % 2 + best_t1 % 2 == 2)
+ tcenter++;
+ return tcenter - best_tm;
+}
+
+void smp_synchronize_tick_client(void)
+{
+ long i, delta, adj, adjust_latency = 0, done = 0;
+ unsigned long flags, rt, master_time_stamp, bound;
+#if DEBUG_TICK_SYNC
+ struct {
+ long rt; /* roundtrip time */
+ long master; /* master's timestamp */
+ long diff; /* difference between midpoint and master's timestamp */
+ long lat; /* estimate of itc adjustment latency */
+ } t[NUM_ROUNDS];
+#endif
+
+ go[MASTER] = 1;
+
+ while (go[MASTER])
+ rmb();
+
+ local_irq_save(flags);
+ {
+ for (i = 0; i < NUM_ROUNDS; i++) {
+ delta = get_delta(&rt, &master_time_stamp);
+ if (delta == 0) {
+ done = 1; /* let's lock on to this... */
+ bound = rt;
+ }
+
+ if (!done) {
+ if (i > 0) {
+ adjust_latency += -delta;
+ adj = -delta + adjust_latency/4;
+ } else
+ adj = -delta;
+
+ tick_ops->add_tick(adj);
+ }
+#if DEBUG_TICK_SYNC
+ t[i].rt = rt;
+ t[i].master = master_time_stamp;
+ t[i].diff = delta;
+ t[i].lat = adjust_latency/4;
+#endif
+ }
+ }
+ local_irq_restore(flags);
+
+#if DEBUG_TICK_SYNC
+ for (i = 0; i < NUM_ROUNDS; i++)
+ printk("rt=%5ld master=%5ld diff=%5ld adjlat=%5ld\n",
+ t[i].rt, t[i].master, t[i].diff, t[i].lat);
+#endif
+
+ printk(KERN_INFO "CPU %d: synchronized TICK with master CPU "
+ "(last diff %ld cycles, maxerr %lu cycles)\n",
+ smp_processor_id(), delta, rt);
+}
+
+static void smp_start_sync_tick_client(int cpu);
+
+static void smp_synchronize_one_tick(int cpu)
+{
+ unsigned long flags, i;
+
+ go[MASTER] = 0;
+
+ smp_start_sync_tick_client(cpu);
+
+ /* wait for client to be ready */
+ while (!go[MASTER])
+ rmb();
+
+ /* now let the client proceed into his loop */
+ go[MASTER] = 0;
+ membar_safe("#StoreLoad");
+
+ spin_lock_irqsave(&itc_sync_lock, flags);
+ {
+ for (i = 0; i < NUM_ROUNDS*NUM_ITERS; i++) {
+ while (!go[MASTER])
+ rmb();
+ go[MASTER] = 0;
+ wmb();
+ go[SLAVE] = tick_ops->get_tick();
+ membar_safe("#StoreLoad");
+ }
+ }
+ spin_unlock_irqrestore(&itc_sync_lock, flags);
+}
+
+#if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU)
+/* XXX Put this in some common place. XXX */
+static unsigned long kimage_addr_to_ra(void *p)
+{
+ unsigned long val = (unsigned long) p;
+
+ return kern_base + (val - KERNBASE);
+}
+
+static void __cpuinit ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
+{
+ extern unsigned long sparc64_ttable_tl0;
+ extern unsigned long kern_locked_tte_data;
+ struct hvtramp_descr *hdesc;
+ unsigned long trampoline_ra;
+ struct trap_per_cpu *tb;
+ u64 tte_vaddr, tte_data;
+ unsigned long hv_err;
+ int i;
+
+ hdesc = kzalloc(sizeof(*hdesc) +
+ (sizeof(struct hvtramp_mapping) *
+ num_kernel_image_mappings - 1),
+ GFP_KERNEL);
+ if (!hdesc) {
+ printk(KERN_ERR "ldom_startcpu_cpuid: Cannot allocate "
+ "hvtramp_descr.\n");
+ return;
+ }
+
+ hdesc->cpu = cpu;
+ hdesc->num_mappings = num_kernel_image_mappings;
+
+ tb = &trap_block[cpu];
+ tb->hdesc = hdesc;
+
+ hdesc->fault_info_va = (unsigned long) &tb->fault_info;
+ hdesc->fault_info_pa = kimage_addr_to_ra(&tb->fault_info);
+
+ hdesc->thread_reg = thread_reg;
+
+ tte_vaddr = (unsigned long) KERNBASE;
+ tte_data = kern_locked_tte_data;
+
+ for (i = 0; i < hdesc->num_mappings; i++) {
+ hdesc->maps[i].vaddr = tte_vaddr;
+ hdesc->maps[i].tte = tte_data;
+ tte_vaddr += 0x400000;
+ tte_data += 0x400000;
+ }
+
+ trampoline_ra = kimage_addr_to_ra(hv_cpu_startup);
+
+ hv_err = sun4v_cpu_start(cpu, trampoline_ra,
+ kimage_addr_to_ra(&sparc64_ttable_tl0),
+ __pa(hdesc));
+ if (hv_err)
+ printk(KERN_ERR "ldom_startcpu_cpuid: sun4v_cpu_start() "
+ "gives error %lu\n", hv_err);
+}
+#endif
+
+extern unsigned long sparc64_cpu_startup;
+
+/* The OBP cpu startup callback truncates the 3rd arg cookie to
+ * 32-bits (I think) so to be safe we have it read the pointer
+ * contained here so we work on >4GB machines. -DaveM
+ */
+static struct thread_info *cpu_new_thread = NULL;
+
+static int __cpuinit smp_boot_one_cpu(unsigned int cpu)
+{
+ struct trap_per_cpu *tb = &trap_block[cpu];
+ unsigned long entry =
+ (unsigned long)(&sparc64_cpu_startup);
+ unsigned long cookie =
+ (unsigned long)(&cpu_new_thread);
+ struct task_struct *p;
+ int timeout, ret;
+
+ p = fork_idle(cpu);
+ if (IS_ERR(p))
+ return PTR_ERR(p);
+ callin_flag = 0;
+ cpu_new_thread = task_thread_info(p);
+
+ if (tlb_type == hypervisor) {
+#if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU)
+ if (ldom_domaining_enabled)
+ ldom_startcpu_cpuid(cpu,
+ (unsigned long) cpu_new_thread);
+ else
+#endif
+ prom_startcpu_cpuid(cpu, entry, cookie);
+ } else {
+ struct device_node *dp = of_find_node_by_cpuid(cpu);
+
+ prom_startcpu(dp->node, entry, cookie);
+ }
+
+ for (timeout = 0; timeout < 50000; timeout++) {
+ if (callin_flag)
+ break;
+ udelay(100);
+ }
+
+ if (callin_flag) {
+ ret = 0;
+ } else {
+ printk("Processor %d is stuck.\n", cpu);
+ ret = -ENODEV;
+ }
+ cpu_new_thread = NULL;
+
+ if (tb->hdesc) {
+ kfree(tb->hdesc);
+ tb->hdesc = NULL;
+ }
+
+ return ret;
+}
+
+static void spitfire_xcall_helper(u64 data0, u64 data1, u64 data2, u64 pstate, unsigned long cpu)
+{
+ u64 result, target;
+ int stuck, tmp;
+
+ if (this_is_starfire) {
+ /* map to real upaid */
+ cpu = (((cpu & 0x3c) << 1) |
+ ((cpu & 0x40) >> 4) |
+ (cpu & 0x3));
+ }
+
+ target = (cpu << 14) | 0x70;
+again:
+ /* Ok, this is the real Spitfire Errata #54.
+ * One must read back from a UDB internal register
+ * after writes to the UDB interrupt dispatch, but
+ * before the membar Sync for that write.
+ * So we use the high UDB control register (ASI 0x7f,
+ * ADDR 0x20) for the dummy read. -DaveM
+ */
+ tmp = 0x40;
+ __asm__ __volatile__(
+ "wrpr %1, %2, %%pstate\n\t"
+ "stxa %4, [%0] %3\n\t"
+ "stxa %5, [%0+%8] %3\n\t"
+ "add %0, %8, %0\n\t"
+ "stxa %6, [%0+%8] %3\n\t"
+ "membar #Sync\n\t"
+ "stxa %%g0, [%7] %3\n\t"
+ "membar #Sync\n\t"
+ "mov 0x20, %%g1\n\t"
+ "ldxa [%%g1] 0x7f, %%g0\n\t"
+ "membar #Sync"
+ : "=r" (tmp)
+ : "r" (pstate), "i" (PSTATE_IE), "i" (ASI_INTR_W),
+ "r" (data0), "r" (data1), "r" (data2), "r" (target),
+ "r" (0x10), "0" (tmp)
+ : "g1");
+
+ /* NOTE: PSTATE_IE is still clear. */
+ stuck = 100000;
+ do {
+ __asm__ __volatile__("ldxa [%%g0] %1, %0"
+ : "=r" (result)
+ : "i" (ASI_INTR_DISPATCH_STAT));
+ if (result == 0) {
+ __asm__ __volatile__("wrpr %0, 0x0, %%pstate"
+ : : "r" (pstate));
+ return;
+ }
+ stuck -= 1;
+ if (stuck == 0)
+ break;
+ } while (result & 0x1);
+ __asm__ __volatile__("wrpr %0, 0x0, %%pstate"
+ : : "r" (pstate));
+ if (stuck == 0) {
+ printk("CPU[%d]: mondo stuckage result[%016lx]\n",
+ smp_processor_id(), result);
+ } else {
+ udelay(2);
+ goto again;
+ }
+}
+
+static void spitfire_xcall_deliver(struct trap_per_cpu *tb, int cnt)
+{
+ u64 *mondo, data0, data1, data2;
+ u16 *cpu_list;
+ u64 pstate;
+ int i;
+
+ __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
+ cpu_list = __va(tb->cpu_list_pa);
+ mondo = __va(tb->cpu_mondo_block_pa);
+ data0 = mondo[0];
+ data1 = mondo[1];
+ data2 = mondo[2];
+ for (i = 0; i < cnt; i++)
+ spitfire_xcall_helper(data0, data1, data2, pstate, cpu_list[i]);
+}
+
+/* Cheetah now allows to send the whole 64-bytes of data in the interrupt
+ * packet, but we have no use for that. However we do take advantage of
+ * the new pipelining feature (ie. dispatch to multiple cpus simultaneously).
+ */
+static void cheetah_xcall_deliver(struct trap_per_cpu *tb, int cnt)
+{
+ int nack_busy_id, is_jbus, need_more;
+ u64 *mondo, pstate, ver, busy_mask;
+ u16 *cpu_list;
+
+ cpu_list = __va(tb->cpu_list_pa);
+ mondo = __va(tb->cpu_mondo_block_pa);
+
+ /* Unfortunately, someone at Sun had the brilliant idea to make the
+ * busy/nack fields hard-coded by ITID number for this Ultra-III
+ * derivative processor.
+ */
+ __asm__ ("rdpr %%ver, %0" : "=r" (ver));
+ is_jbus = ((ver >> 32) == __JALAPENO_ID ||
+ (ver >> 32) == __SERRANO_ID);
+
+ __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
+
+retry:
+ need_more = 0;
+ __asm__ __volatile__("wrpr %0, %1, %%pstate\n\t"
+ : : "r" (pstate), "i" (PSTATE_IE));
+
+ /* Setup the dispatch data registers. */
+ __asm__ __volatile__("stxa %0, [%3] %6\n\t"
+ "stxa %1, [%4] %6\n\t"
+ "stxa %2, [%5] %6\n\t"
+ "membar #Sync\n\t"
+ : /* no outputs */
+ : "r" (mondo[0]), "r" (mondo[1]), "r" (mondo[2]),
+ "r" (0x40), "r" (0x50), "r" (0x60),
+ "i" (ASI_INTR_W));
+
+ nack_busy_id = 0;
+ busy_mask = 0;
+ {
+ int i;
+
+ for (i = 0; i < cnt; i++) {
+ u64 target, nr;
+
+ nr = cpu_list[i];
+ if (nr == 0xffff)
+ continue;
+
+ target = (nr << 14) | 0x70;
+ if (is_jbus) {
+ busy_mask |= (0x1UL << (nr * 2));
+ } else {
+ target |= (nack_busy_id << 24);
+ busy_mask |= (0x1UL <<
+ (nack_busy_id * 2));
+ }
+ __asm__ __volatile__(
+ "stxa %%g0, [%0] %1\n\t"
+ "membar #Sync\n\t"
+ : /* no outputs */
+ : "r" (target), "i" (ASI_INTR_W));
+ nack_busy_id++;
+ if (nack_busy_id == 32) {
+ need_more = 1;
+ break;
+ }
+ }
+ }
+
+ /* Now, poll for completion. */
+ {
+ u64 dispatch_stat, nack_mask;
+ long stuck;
+
+ stuck = 100000 * nack_busy_id;
+ nack_mask = busy_mask << 1;
+ do {
+ __asm__ __volatile__("ldxa [%%g0] %1, %0"
+ : "=r" (dispatch_stat)
+ : "i" (ASI_INTR_DISPATCH_STAT));
+ if (!(dispatch_stat & (busy_mask | nack_mask))) {
+ __asm__ __volatile__("wrpr %0, 0x0, %%pstate"
+ : : "r" (pstate));
+ if (unlikely(need_more)) {
+ int i, this_cnt = 0;
+ for (i = 0; i < cnt; i++) {
+ if (cpu_list[i] == 0xffff)
+ continue;
+ cpu_list[i] = 0xffff;
+ this_cnt++;
+ if (this_cnt == 32)
+ break;
+ }
+ goto retry;
+ }
+ return;
+ }
+ if (!--stuck)
+ break;
+ } while (dispatch_stat & busy_mask);
+
+ __asm__ __volatile__("wrpr %0, 0x0, %%pstate"
+ : : "r" (pstate));
+
+ if (dispatch_stat & busy_mask) {
+ /* Busy bits will not clear, continue instead
+ * of freezing up on this cpu.
+ */
+ printk("CPU[%d]: mondo stuckage result[%016lx]\n",
+ smp_processor_id(), dispatch_stat);
+ } else {
+ int i, this_busy_nack = 0;
+
+ /* Delay some random time with interrupts enabled
+ * to prevent deadlock.
+ */
+ udelay(2 * nack_busy_id);
+
+ /* Clear out the mask bits for cpus which did not
+ * NACK us.
+ */
+ for (i = 0; i < cnt; i++) {
+ u64 check_mask, nr;
+
+ nr = cpu_list[i];
+ if (nr == 0xffff)
+ continue;
+
+ if (is_jbus)
+ check_mask = (0x2UL << (2*nr));
+ else
+ check_mask = (0x2UL <<
+ this_busy_nack);
+ if ((dispatch_stat & check_mask) == 0)
+ cpu_list[i] = 0xffff;
+ this_busy_nack += 2;
+ if (this_busy_nack == 64)
+ break;
+ }
+
+ goto retry;
+ }
+ }
+}
+
+/* Multi-cpu list version. */
+static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt)
+{
+ int retries, this_cpu, prev_sent, i, saw_cpu_error;
+ unsigned long status;
+ u16 *cpu_list;
+
+ this_cpu = smp_processor_id();
+
+ cpu_list = __va(tb->cpu_list_pa);
+
+ saw_cpu_error = 0;
+ retries = 0;
+ prev_sent = 0;
+ do {
+ int forward_progress, n_sent;
+
+ status = sun4v_cpu_mondo_send(cnt,
+ tb->cpu_list_pa,
+ tb->cpu_mondo_block_pa);
+
+ /* HV_EOK means all cpus received the xcall, we're done. */
+ if (likely(status == HV_EOK))
+ break;
+
+ /* First, see if we made any forward progress.
+ *
+ * The hypervisor indicates successful sends by setting
+ * cpu list entries to the value 0xffff.
+ */
+ n_sent = 0;
+ for (i = 0; i < cnt; i++) {
+ if (likely(cpu_list[i] == 0xffff))
+ n_sent++;
+ }
+
+ forward_progress = 0;
+ if (n_sent > prev_sent)
+ forward_progress = 1;
+
+ prev_sent = n_sent;
+
+ /* If we get a HV_ECPUERROR, then one or more of the cpus
+ * in the list are in error state. Use the cpu_state()
+ * hypervisor call to find out which cpus are in error state.
+ */
+ if (unlikely(status == HV_ECPUERROR)) {
+ for (i = 0; i < cnt; i++) {
+ long err;
+ u16 cpu;
+
+ cpu = cpu_list[i];
+ if (cpu == 0xffff)
+ continue;
+
+ err = sun4v_cpu_state(cpu);
+ if (err == HV_CPU_STATE_ERROR) {
+ saw_cpu_error = (cpu + 1);
+ cpu_list[i] = 0xffff;
+ }
+ }
+ } else if (unlikely(status != HV_EWOULDBLOCK))
+ goto fatal_mondo_error;
+
+ /* Don't bother rewriting the CPU list, just leave the
+ * 0xffff and non-0xffff entries in there and the
+ * hypervisor will do the right thing.
+ *
+ * Only advance timeout state if we didn't make any
+ * forward progress.
+ */
+ if (unlikely(!forward_progress)) {
+ if (unlikely(++retries > 10000))
+ goto fatal_mondo_timeout;
+
+ /* Delay a little bit to let other cpus catch up
+ * on their cpu mondo queue work.
+ */
+ udelay(2 * cnt);
+ }
+ } while (1);
+
+ if (unlikely(saw_cpu_error))
+ goto fatal_mondo_cpu_error;
+
+ return;
+
+fatal_mondo_cpu_error:
+ printk(KERN_CRIT "CPU[%d]: SUN4V mondo cpu error, some target cpus "
+ "(including %d) were in error state\n",
+ this_cpu, saw_cpu_error - 1);
+ return;
+
+fatal_mondo_timeout:
+ printk(KERN_CRIT "CPU[%d]: SUN4V mondo timeout, no forward "
+ " progress after %d retries.\n",
+ this_cpu, retries);
+ goto dump_cpu_list_and_out;
+
+fatal_mondo_error:
+ printk(KERN_CRIT "CPU[%d]: Unexpected SUN4V mondo error %lu\n",
+ this_cpu, status);
+ printk(KERN_CRIT "CPU[%d]: Args were cnt(%d) cpulist_pa(%lx) "
+ "mondo_block_pa(%lx)\n",
+ this_cpu, cnt, tb->cpu_list_pa, tb->cpu_mondo_block_pa);
+
+dump_cpu_list_and_out:
+ printk(KERN_CRIT "CPU[%d]: CPU list [ ", this_cpu);
+ for (i = 0; i < cnt; i++)
+ printk("%u ", cpu_list[i]);
+ printk("]\n");
+}
+
+static void (*xcall_deliver_impl)(struct trap_per_cpu *, int);
+
+static void xcall_deliver(u64 data0, u64 data1, u64 data2, const cpumask_t *mask)
+{
+ struct trap_per_cpu *tb;
+ int this_cpu, i, cnt;
+ unsigned long flags;
+ u16 *cpu_list;
+ u64 *mondo;
+
+ /* We have to do this whole thing with interrupts fully disabled.
+ * Otherwise if we send an xcall from interrupt context it will
+ * corrupt both our mondo block and cpu list state.
+ *
+ * One consequence of this is that we cannot use timeout mechanisms
+ * that depend upon interrupts being delivered locally. So, for
+ * example, we cannot sample jiffies and expect it to advance.
+ *
+ * Fortunately, udelay() uses %stick/%tick so we can use that.
+ */
+ local_irq_save(flags);
+
+ this_cpu = smp_processor_id();
+ tb = &trap_block[this_cpu];
+
+ mondo = __va(tb->cpu_mondo_block_pa);
+ mondo[0] = data0;
+ mondo[1] = data1;
+ mondo[2] = data2;
+ wmb();
+
+ cpu_list = __va(tb->cpu_list_pa);
+
+ /* Setup the initial cpu list. */
+ cnt = 0;
+ for_each_cpu(i, mask) {
+ if (i == this_cpu || !cpu_online(i))
+ continue;
+ cpu_list[cnt++] = i;
+ }
+
+ if (cnt)
+ xcall_deliver_impl(tb, cnt);
+
+ local_irq_restore(flags);
+}
+
+/* Send cross call to all processors mentioned in MASK_P
+ * except self. Really, there are only two cases currently,
+ * "&cpu_online_map" and "&mm->cpu_vm_mask".
+ */
+static void smp_cross_call_masked(unsigned long *func, u32 ctx, u64 data1, u64 data2, const cpumask_t *mask)
+{
+ u64 data0 = (((u64)ctx)<<32 | (((u64)func) & 0xffffffff));
+
+ xcall_deliver(data0, data1, data2, mask);
+}
+
+/* Send cross call to all processors except self. */
+static void smp_cross_call(unsigned long *func, u32 ctx, u64 data1, u64 data2)
+{
+ smp_cross_call_masked(func, ctx, data1, data2, &cpu_online_map);
+}
+
+extern unsigned long xcall_sync_tick;
+
+static void smp_start_sync_tick_client(int cpu)
+{
+ xcall_deliver((u64) &xcall_sync_tick, 0, 0,
+ &cpumask_of_cpu(cpu));
+}
+
+extern unsigned long xcall_call_function;
+
+void arch_send_call_function_ipi(cpumask_t mask)
+{
+ xcall_deliver((u64) &xcall_call_function, 0, 0, &mask);
+}
+
+extern unsigned long xcall_call_function_single;
+
+void arch_send_call_function_single_ipi(int cpu)
+{
+ xcall_deliver((u64) &xcall_call_function_single, 0, 0,
+ &cpumask_of_cpu(cpu));
+}
+
+void smp_call_function_client(int irq, struct pt_regs *regs)
+{
+ clear_softint(1 << irq);
+ generic_smp_call_function_interrupt();
+}
+
+void smp_call_function_single_client(int irq, struct pt_regs *regs)
+{
+ clear_softint(1 << irq);
+ generic_smp_call_function_single_interrupt();
+}
+
+static void tsb_sync(void *info)
+{
+ struct trap_per_cpu *tp = &trap_block[raw_smp_processor_id()];
+ struct mm_struct *mm = info;
+
+ /* It is not valid to test "currrent->active_mm == mm" here.
+ *
+ * The value of "current" is not changed atomically with
+ * switch_mm(). But that's OK, we just need to check the
+ * current cpu's trap block PGD physical address.
+ */
+ if (tp->pgd_paddr == __pa(mm->pgd))
+ tsb_context_switch(mm);
+}
+
+void smp_tsb_sync(struct mm_struct *mm)
+{
+ smp_call_function_mask(mm->cpu_vm_mask, tsb_sync, mm, 1);
+}
+
+extern unsigned long xcall_flush_tlb_mm;
+extern unsigned long xcall_flush_tlb_pending;
+extern unsigned long xcall_flush_tlb_kernel_range;
+extern unsigned long xcall_fetch_glob_regs;
+extern unsigned long xcall_receive_signal;
+extern unsigned long xcall_new_mmu_context_version;
+#ifdef CONFIG_KGDB
+extern unsigned long xcall_kgdb_capture;
+#endif
+
+#ifdef DCACHE_ALIASING_POSSIBLE
+extern unsigned long xcall_flush_dcache_page_cheetah;
+#endif
+extern unsigned long xcall_flush_dcache_page_spitfire;
+
+#ifdef CONFIG_DEBUG_DCFLUSH
+extern atomic_t dcpage_flushes;
+extern atomic_t dcpage_flushes_xcall;
+#endif
+
+static inline void __local_flush_dcache_page(struct page *page)
+{
+#ifdef DCACHE_ALIASING_POSSIBLE
+ __flush_dcache_page(page_address(page),
+ ((tlb_type == spitfire) &&
+ page_mapping(page) != NULL));
+#else
+ if (page_mapping(page) != NULL &&
+ tlb_type == spitfire)
+ __flush_icache_page(__pa(page_address(page)));
+#endif
+}
+
+void smp_flush_dcache_page_impl(struct page *page, int cpu)
+{
+ int this_cpu;
+
+ if (tlb_type == hypervisor)
+ return;
+
+#ifdef CONFIG_DEBUG_DCFLUSH
+ atomic_inc(&dcpage_flushes);
+#endif
+
+ this_cpu = get_cpu();
+
+ if (cpu == this_cpu) {
+ __local_flush_dcache_page(page);
+ } else if (cpu_online(cpu)) {
+ void *pg_addr = page_address(page);
+ u64 data0 = 0;
+
+ if (tlb_type == spitfire) {
+ data0 = ((u64)&xcall_flush_dcache_page_spitfire);
+ if (page_mapping(page) != NULL)
+ data0 |= ((u64)1 << 32);
+ } else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
+#ifdef DCACHE_ALIASING_POSSIBLE
+ data0 = ((u64)&xcall_flush_dcache_page_cheetah);
+#endif
+ }
+ if (data0) {
+ xcall_deliver(data0, __pa(pg_addr),
+ (u64) pg_addr, &cpumask_of_cpu(cpu));
+#ifdef CONFIG_DEBUG_DCFLUSH
+ atomic_inc(&dcpage_flushes_xcall);
+#endif
+ }
+ }
+
+ put_cpu();
+}
+
+void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
+{
+ void *pg_addr;
+ int this_cpu;
+ u64 data0;
+
+ if (tlb_type == hypervisor)
+ return;
+
+ this_cpu = get_cpu();
+
+#ifdef CONFIG_DEBUG_DCFLUSH
+ atomic_inc(&dcpage_flushes);
+#endif
+ data0 = 0;
+ pg_addr = page_address(page);
+ if (tlb_type == spitfire) {
+ data0 = ((u64)&xcall_flush_dcache_page_spitfire);
+ if (page_mapping(page) != NULL)
+ data0 |= ((u64)1 << 32);
+ } else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
+#ifdef DCACHE_ALIASING_POSSIBLE
+ data0 = ((u64)&xcall_flush_dcache_page_cheetah);
+#endif
+ }
+ if (data0) {
+ xcall_deliver(data0, __pa(pg_addr),
+ (u64) pg_addr, &cpu_online_map);
+#ifdef CONFIG_DEBUG_DCFLUSH
+ atomic_inc(&dcpage_flushes_xcall);
+#endif
+ }
+ __local_flush_dcache_page(page);
+
+ put_cpu();
+}
+
+void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
+{
+ struct mm_struct *mm;
+ unsigned long flags;
+
+ clear_softint(1 << irq);
+
+ /* See if we need to allocate a new TLB context because
+ * the version of the one we are using is now out of date.
+ */
+ mm = current->active_mm;
+ if (unlikely(!mm || (mm == &init_mm)))
+ return;
+
+ spin_lock_irqsave(&mm->context.lock, flags);
+
+ if (unlikely(!CTX_VALID(mm->context)))
+ get_new_mmu_context(mm);
+
+ spin_unlock_irqrestore(&mm->context.lock, flags);
+
+ load_secondary_context(mm);
+ __flush_tlb_mm(CTX_HWBITS(mm->context),
+ SECONDARY_CONTEXT);
+}
+
+void smp_new_mmu_context_version(void)
+{
+ smp_cross_call(&xcall_new_mmu_context_version, 0, 0, 0);
+}
+
+#ifdef CONFIG_KGDB
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ smp_cross_call(&xcall_kgdb_capture, 0, 0, 0);
+}
+#endif
+
+void smp_fetch_global_regs(void)
+{
+ smp_cross_call(&xcall_fetch_glob_regs, 0, 0, 0);
+}
+
+/* We know that the window frames of the user have been flushed
+ * to the stack before we get here because all callers of us
+ * are flush_tlb_*() routines, and these run after flush_cache_*()
+ * which performs the flushw.
+ *
+ * The SMP TLB coherency scheme we use works as follows:
+ *
+ * 1) mm->cpu_vm_mask is a bit mask of which cpus an address
+ * space has (potentially) executed on, this is the heuristic
+ * we use to avoid doing cross calls.
+ *
+ * Also, for flushing from kswapd and also for clones, we
+ * use cpu_vm_mask as the list of cpus to make run the TLB.
+ *
+ * 2) TLB context numbers are shared globally across all processors
+ * in the system, this allows us to play several games to avoid
+ * cross calls.
+ *
+ * One invariant is that when a cpu switches to a process, and
+ * that processes tsk->active_mm->cpu_vm_mask does not have the
+ * current cpu's bit set, that tlb context is flushed locally.
+ *
+ * If the address space is non-shared (ie. mm->count == 1) we avoid
+ * cross calls when we want to flush the currently running process's
+ * tlb state. This is done by clearing all cpu bits except the current
+ * processor's in current->active_mm->cpu_vm_mask and performing the
+ * flush locally only. This will force any subsequent cpus which run
+ * this task to flush the context from the local tlb if the process
+ * migrates to another cpu (again).
+ *
+ * 3) For shared address spaces (threads) and swapping we bite the
+ * bullet for most cases and perform the cross call (but only to
+ * the cpus listed in cpu_vm_mask).
+ *
+ * The performance gain from "optimizing" away the cross call for threads is
+ * questionable (in theory the big win for threads is the massive sharing of
+ * address space state across processors).
+ */
+
+/* This currently is only used by the hugetlb arch pre-fault
+ * hook on UltraSPARC-III+ and later when changing the pagesize
+ * bits of the context register for an address space.
+ */
+void smp_flush_tlb_mm(struct mm_struct *mm)
+{
+ u32 ctx = CTX_HWBITS(mm->context);
+ int cpu = get_cpu();
+
+ if (atomic_read(&mm->mm_users) == 1) {
+ mm->cpu_vm_mask = cpumask_of_cpu(cpu);
+ goto local_flush_and_out;
+ }
+
+ smp_cross_call_masked(&xcall_flush_tlb_mm,
+ ctx, 0, 0,
+ &mm->cpu_vm_mask);
+
+local_flush_and_out:
+ __flush_tlb_mm(ctx, SECONDARY_CONTEXT);
+
+ put_cpu();
+}
+
+void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long *vaddrs)
+{
+ u32 ctx = CTX_HWBITS(mm->context);
+ int cpu = get_cpu();
+
+ if (mm == current->active_mm && atomic_read(&mm->mm_users) == 1)
+ mm->cpu_vm_mask = cpumask_of_cpu(cpu);
+ else
+ smp_cross_call_masked(&xcall_flush_tlb_pending,
+ ctx, nr, (unsigned long) vaddrs,
+ &mm->cpu_vm_mask);
+
+ __flush_tlb_pending(ctx, nr, vaddrs);
+
+ put_cpu();
+}
+
+void smp_flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+ start &= PAGE_MASK;
+ end = PAGE_ALIGN(end);
+ if (start != end) {
+ smp_cross_call(&xcall_flush_tlb_kernel_range,
+ 0, start, end);
+
+ __flush_tlb_kernel_range(start, end);
+ }
+}
+
+/* CPU capture. */
+/* #define CAPTURE_DEBUG */
+extern unsigned long xcall_capture;
+
+static atomic_t smp_capture_depth = ATOMIC_INIT(0);
+static atomic_t smp_capture_registry = ATOMIC_INIT(0);
+static unsigned long penguins_are_doing_time;
+
+void smp_capture(void)
+{
+ int result = atomic_add_ret(1, &smp_capture_depth);
+
+ if (result == 1) {
+ int ncpus = num_online_cpus();
+
+#ifdef CAPTURE_DEBUG
+ printk("CPU[%d]: Sending penguins to jail...",
+ smp_processor_id());
+#endif
+ penguins_are_doing_time = 1;
+ atomic_inc(&smp_capture_registry);
+ smp_cross_call(&xcall_capture, 0, 0, 0);
+ while (atomic_read(&smp_capture_registry) != ncpus)
+ rmb();
+#ifdef CAPTURE_DEBUG
+ printk("done\n");
+#endif
+ }
+}
+
+void smp_release(void)
+{
+ if (atomic_dec_and_test(&smp_capture_depth)) {
+#ifdef CAPTURE_DEBUG
+ printk("CPU[%d]: Giving pardon to "
+ "imprisoned penguins\n",
+ smp_processor_id());
+#endif
+ penguins_are_doing_time = 0;
+ membar_safe("#StoreLoad");
+ atomic_dec(&smp_capture_registry);
+ }
+}
+
+/* Imprisoned penguins run with %pil == PIL_NORMAL_MAX, but PSTATE_IE
+ * set, so they can service tlb flush xcalls...
+ */
+extern void prom_world(int);
+
+void smp_penguin_jailcell(int irq, struct pt_regs *regs)
+{
+ clear_softint(1 << irq);
+
+ preempt_disable();
+
+ __asm__ __volatile__("flushw");
+ prom_world(1);
+ atomic_inc(&smp_capture_registry);
+ membar_safe("#StoreLoad");
+ while (penguins_are_doing_time)
+ rmb();
+ atomic_dec(&smp_capture_registry);
+ prom_world(0);
+
+ preempt_enable();
+}
+
+/* /proc/profile writes can call this, don't __init it please. */
+int setup_profiling_timer(unsigned int multiplier)
+{
+ return -EINVAL;
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+void __devinit smp_prepare_boot_cpu(void)
+{
+}
+
+void __init smp_setup_processor_id(void)
+{
+ if (tlb_type == spitfire)
+ xcall_deliver_impl = spitfire_xcall_deliver;
+ else if (tlb_type == cheetah || tlb_type == cheetah_plus)
+ xcall_deliver_impl = cheetah_xcall_deliver;
+ else
+ xcall_deliver_impl = hypervisor_xcall_deliver;
+}
+
+void __devinit smp_fill_in_sib_core_maps(void)
+{
+ unsigned int i;
+
+ for_each_present_cpu(i) {
+ unsigned int j;
+
+ cpus_clear(cpu_core_map[i]);
+ if (cpu_data(i).core_id == 0) {
+ cpu_set(i, cpu_core_map[i]);
+ continue;
+ }
+
+ for_each_present_cpu(j) {
+ if (cpu_data(i).core_id ==
+ cpu_data(j).core_id)
+ cpu_set(j, cpu_core_map[i]);
+ }
+ }
+
+ for_each_present_cpu(i) {
+ unsigned int j;
+
+ cpus_clear(per_cpu(cpu_sibling_map, i));
+ if (cpu_data(i).proc_id == -1) {
+ cpu_set(i, per_cpu(cpu_sibling_map, i));
+ continue;
+ }
+
+ for_each_present_cpu(j) {
+ if (cpu_data(i).proc_id ==
+ cpu_data(j).proc_id)
+ cpu_set(j, per_cpu(cpu_sibling_map, i));
+ }
+ }
+}
+
+int __cpuinit __cpu_up(unsigned int cpu)
+{
+ int ret = smp_boot_one_cpu(cpu);
+
+ if (!ret) {
+ cpu_set(cpu, smp_commenced_mask);
+ while (!cpu_isset(cpu, cpu_online_map))
+ mb();
+ if (!cpu_isset(cpu, cpu_online_map)) {
+ ret = -ENODEV;
+ } else {
+ /* On SUN4V, writes to %tick and %stick are
+ * not allowed.
+ */
+ if (tlb_type != hypervisor)
+ smp_synchronize_one_tick(cpu);
+ }
+ }
+ return ret;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+void cpu_play_dead(void)
+{
+ int cpu = smp_processor_id();
+ unsigned long pstate;
+
+ idle_task_exit();
+
+ if (tlb_type == hypervisor) {
+ struct trap_per_cpu *tb = &trap_block[cpu];
+
+ sun4v_cpu_qconf(HV_CPU_QUEUE_CPU_MONDO,
+ tb->cpu_mondo_pa, 0);
+ sun4v_cpu_qconf(HV_CPU_QUEUE_DEVICE_MONDO,
+ tb->dev_mondo_pa, 0);
+ sun4v_cpu_qconf(HV_CPU_QUEUE_RES_ERROR,
+ tb->resum_mondo_pa, 0);
+ sun4v_cpu_qconf(HV_CPU_QUEUE_NONRES_ERROR,
+ tb->nonresum_mondo_pa, 0);
+ }
+
+ cpu_clear(cpu, smp_commenced_mask);
+ membar_safe("#Sync");
+
+ local_irq_disable();
+
+ __asm__ __volatile__(
+ "rdpr %%pstate, %0\n\t"
+ "wrpr %0, %1, %%pstate"
+ : "=r" (pstate)
+ : "i" (PSTATE_IE));
+
+ while (1)
+ barrier();
+}
+
+int __cpu_disable(void)
+{
+ int cpu = smp_processor_id();
+ cpuinfo_sparc *c;
+ int i;
+
+ for_each_cpu_mask(i, cpu_core_map[cpu])
+ cpu_clear(cpu, cpu_core_map[i]);
+ cpus_clear(cpu_core_map[cpu]);
+
+ for_each_cpu_mask(i, per_cpu(cpu_sibling_map, cpu))
+ cpu_clear(cpu, per_cpu(cpu_sibling_map, i));
+ cpus_clear(per_cpu(cpu_sibling_map, cpu));
+
+ c = &cpu_data(cpu);
+
+ c->core_id = 0;
+ c->proc_id = -1;
+
+ smp_wmb();
+
+ /* Make sure no interrupts point to this cpu. */
+ fixup_irqs();
+
+ local_irq_enable();
+ mdelay(1);
+ local_irq_disable();
+
+ ipi_call_lock();
+ cpu_clear(cpu, cpu_online_map);
+ ipi_call_unlock();
+
+ return 0;
+}
+
+void __cpu_die(unsigned int cpu)
+{
+ int i;
+
+ for (i = 0; i < 100; i++) {
+ smp_rmb();
+ if (!cpu_isset(cpu, smp_commenced_mask))
+ break;
+ msleep(100);
+ }
+ if (cpu_isset(cpu, smp_commenced_mask)) {
+ printk(KERN_ERR "CPU %u didn't die...\n", cpu);
+ } else {
+#if defined(CONFIG_SUN_LDOMS)
+ unsigned long hv_err;
+ int limit = 100;
+
+ do {
+ hv_err = sun4v_cpu_stop(cpu);
+ if (hv_err == HV_EOK) {
+ cpu_clear(cpu, cpu_present_map);
+ break;
+ }
+ } while (--limit > 0);
+ if (limit <= 0) {
+ printk(KERN_ERR "sun4v_cpu_stop() fails err=%lu\n",
+ hv_err);
+ }
+#endif
+ }
+}
+#endif
+
+void __init smp_cpus_done(unsigned int max_cpus)
+{
+}
+
+void smp_send_reschedule(int cpu)
+{
+ xcall_deliver((u64) &xcall_receive_signal, 0, 0,
+ &cpumask_of_cpu(cpu));
+}
+
+void smp_receive_signal_client(int irq, struct pt_regs *regs)
+{
+ clear_softint(1 << irq);
+}
+
+/* This is a nop because we capture all other cpus
+ * anyways when making the PROM active.
+ */
+void smp_send_stop(void)
+{
+}
+
+unsigned long __per_cpu_base __read_mostly;
+unsigned long __per_cpu_shift __read_mostly;
+
+EXPORT_SYMBOL(__per_cpu_base);
+EXPORT_SYMBOL(__per_cpu_shift);
+
+void __init real_setup_per_cpu_areas(void)
+{
+ unsigned long paddr, goal, size, i;
+ char *ptr;
+
+ /* Copy section for each CPU (we discard the original) */
+ goal = PERCPU_ENOUGH_ROOM;
+
+ __per_cpu_shift = PAGE_SHIFT;
+ for (size = PAGE_SIZE; size < goal; size <<= 1UL)
+ __per_cpu_shift++;
+
+ paddr = lmb_alloc(size * NR_CPUS, PAGE_SIZE);
+ if (!paddr) {
+ prom_printf("Cannot allocate per-cpu memory.\n");
+ prom_halt();
+ }
+
+ ptr = __va(paddr);
+ __per_cpu_base = ptr - __per_cpu_start;
+
+ for (i = 0; i < NR_CPUS; i++, ptr += size)
+ memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+
+ /* Setup %g5 for the boot cpu. */
+ __local_per_cpu_offset = __per_cpu_offset(smp_processor_id());
+}
--- /dev/null
-
- /* CPU online map and active count. */
- EXPORT_SYMBOL(cpu_online_map);
- EXPORT_SYMBOL(phys_cpu_present_map);
+/*
+ * arch/sparc/kernel/ksyms.c: Sparc specific ksyms support.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
+ */
+
+/* Tell string.h we don't want memcpy etc. as cpp defines */
+#define EXPORT_SYMTAB_STROPS
+#define PROMLIB_INTERNAL
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/in6.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/syscalls.h>
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#endif
+#include <linux/pm.h>
+#ifdef CONFIG_HIGHMEM
+#include <linux/highmem.h>
+#endif
+
+#include <asm/oplib.h>
+#include <asm/delay.h>
+#include <asm/system.h>
+#include <asm/auxio.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/idprom.h>
+#include <asm/head.h>
+#include <asm/smp.h>
+#include <asm/ptrace.h>
+#include <asm/uaccess.h>
+#include <asm/checksum.h>
+#ifdef CONFIG_SBUS
+#include <asm/dma.h>
+#endif
+#include <asm/io-unit.h>
+#include <asm/bug.h>
+
+extern spinlock_t rtc_lock;
+
+struct poll {
+ int fd;
+ short events;
+ short revents;
+};
+
+extern void (*__copy_1page)(void *, const void *);
+extern void __memmove(void *, const void *, __kernel_size_t);
+extern void (*bzero_1page)(void *);
+extern void *__bzero(void *, size_t);
+extern void *__memscan_zero(void *, size_t);
+extern void *__memscan_generic(void *, int, size_t);
+extern int __strncmp(const char *, const char *, __kernel_size_t);
+
+extern int __ashrdi3(int, int);
+extern int __ashldi3(int, int);
+extern int __lshrdi3(int, int);
+extern int __muldi3(int, int);
+extern int __divdi3(int, int);
+
+/* Private functions with odd calling conventions. */
+extern void ___atomic24_add(void);
+extern void ___atomic24_sub(void);
+extern void ___rw_read_enter(void);
+extern void ___rw_read_try(void);
+extern void ___rw_read_exit(void);
+extern void ___rw_write_enter(void);
+
+/* Alias functions whose names begin with "." and export the aliases.
+ * The module references will be fixed up by module_frob_arch_sections.
+ */
+extern int _Div(int, int);
+extern int _Mul(int, int);
+extern int _Rem(int, int);
+extern unsigned _Udiv(unsigned, unsigned);
+extern unsigned _Umul(unsigned, unsigned);
+extern unsigned _Urem(unsigned, unsigned);
+
+/* used by various drivers */
+EXPORT_SYMBOL(sparc_cpu_model);
+EXPORT_SYMBOL(kernel_thread);
+#ifdef CONFIG_SMP
+// XXX find what uses (or used) these. AV: see asm/spinlock.h
+EXPORT_SYMBOL(___rw_read_enter);
+EXPORT_SYMBOL(___rw_read_try);
+EXPORT_SYMBOL(___rw_read_exit);
+EXPORT_SYMBOL(___rw_write_enter);
+#endif
+
+EXPORT_SYMBOL(sparc_valid_addr_bitmap);
+EXPORT_SYMBOL(phys_base);
+EXPORT_SYMBOL(pfn_base);
+
+/* Atomic operations. */
+EXPORT_SYMBOL(___atomic24_add);
+EXPORT_SYMBOL(___atomic24_sub);
+
+/* Per-CPU information table */
+EXPORT_PER_CPU_SYMBOL(__cpu_data);
+
+#ifdef CONFIG_SMP
+/* IRQ implementation. */
+EXPORT_SYMBOL(synchronize_irq);
+#endif
+
+EXPORT_SYMBOL(__udelay);
+EXPORT_SYMBOL(__ndelay);
+EXPORT_SYMBOL(rtc_lock);
+EXPORT_SYMBOL(set_auxio);
+EXPORT_SYMBOL(get_auxio);
+EXPORT_SYMBOL(io_remap_pfn_range);
+
+#ifndef CONFIG_SMP
+EXPORT_SYMBOL(BTFIXUP_CALL(___xchg32));
+#else
+EXPORT_SYMBOL(BTFIXUP_CALL(__hard_smp_processor_id));
+#endif
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_unlockarea));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_lockarea));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_get_scsi_sgl));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_get_scsi_one));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_release_scsi_sgl));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_release_scsi_one));
+
+EXPORT_SYMBOL(BTFIXUP_CALL(pgprot_noncached));
+
+#ifdef CONFIG_SBUS
+EXPORT_SYMBOL(sbus_set_sbus64);
+#endif
+#ifdef CONFIG_PCI
+EXPORT_SYMBOL(insb);
+EXPORT_SYMBOL(outsb);
+EXPORT_SYMBOL(insw);
+EXPORT_SYMBOL(outsw);
+EXPORT_SYMBOL(insl);
+EXPORT_SYMBOL(outsl);
+EXPORT_SYMBOL(pci_alloc_consistent);
+EXPORT_SYMBOL(pci_free_consistent);
+EXPORT_SYMBOL(pci_map_single);
+EXPORT_SYMBOL(pci_unmap_single);
+EXPORT_SYMBOL(pci_dma_sync_single_for_cpu);
+EXPORT_SYMBOL(pci_dma_sync_single_for_device);
+EXPORT_SYMBOL(pci_dma_sync_sg_for_cpu);
+EXPORT_SYMBOL(pci_dma_sync_sg_for_device);
+EXPORT_SYMBOL(pci_map_sg);
+EXPORT_SYMBOL(pci_unmap_sg);
+EXPORT_SYMBOL(pci_map_page);
+EXPORT_SYMBOL(pci_unmap_page);
+/* Actually, ioremap/iounmap are not PCI specific. But it is ok for drivers. */
+EXPORT_SYMBOL(ioremap);
+EXPORT_SYMBOL(iounmap);
+#endif
+
+/* in arch/sparc/mm/highmem.c */
+#ifdef CONFIG_HIGHMEM
+EXPORT_SYMBOL(kmap_atomic);
+EXPORT_SYMBOL(kunmap_atomic);
+#endif
+
+/* prom symbols */
+EXPORT_SYMBOL(idprom);
+EXPORT_SYMBOL(prom_root_node);
+EXPORT_SYMBOL(prom_getchild);
+EXPORT_SYMBOL(prom_getsibling);
+EXPORT_SYMBOL(prom_searchsiblings);
+EXPORT_SYMBOL(prom_firstprop);
+EXPORT_SYMBOL(prom_nextprop);
+EXPORT_SYMBOL(prom_getproplen);
+EXPORT_SYMBOL(prom_getproperty);
+EXPORT_SYMBOL(prom_node_has_property);
+EXPORT_SYMBOL(prom_setprop);
+EXPORT_SYMBOL(saved_command_line);
+EXPORT_SYMBOL(prom_apply_obio_ranges);
+EXPORT_SYMBOL(prom_feval);
+EXPORT_SYMBOL(prom_getbool);
+EXPORT_SYMBOL(prom_getstring);
+EXPORT_SYMBOL(prom_getint);
+EXPORT_SYMBOL(prom_getintdefault);
+EXPORT_SYMBOL(prom_finddevice);
+EXPORT_SYMBOL(romvec);
+EXPORT_SYMBOL(__prom_getchild);
+EXPORT_SYMBOL(__prom_getsibling);
+
+/* sparc library symbols */
+EXPORT_SYMBOL(memscan);
+EXPORT_SYMBOL(strlen);
+EXPORT_SYMBOL(strncmp);
+EXPORT_SYMBOL(page_kernel);
+
+/* Special internal versions of library functions. */
+EXPORT_SYMBOL(__copy_1page);
+EXPORT_SYMBOL(__memcpy);
+EXPORT_SYMBOL(__memset);
+EXPORT_SYMBOL(bzero_1page);
+EXPORT_SYMBOL(__bzero);
+EXPORT_SYMBOL(__memscan_zero);
+EXPORT_SYMBOL(__memscan_generic);
+EXPORT_SYMBOL(__strncmp);
+EXPORT_SYMBOL(__memmove);
+
+/* Moving data to/from userspace. */
+EXPORT_SYMBOL(__copy_user);
+EXPORT_SYMBOL(__strncpy_from_user);
+EXPORT_SYMBOL(__strnlen_user);
+
+/* Networking helper routines. */
+EXPORT_SYMBOL(__csum_partial_copy_sparc_generic);
+EXPORT_SYMBOL(csum_partial);
+
+/* Cache flushing. */
+EXPORT_SYMBOL(sparc_flush_page_to_ram);
+
+/* For when serial stuff is built as modules. */
+EXPORT_SYMBOL(sun_do_break);
+
+EXPORT_SYMBOL(__ret_efault);
+
+EXPORT_SYMBOL(memcmp);
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__muldi3);
+EXPORT_SYMBOL(__divdi3);
+
+EXPORT_SYMBOL(_Rem);
+EXPORT_SYMBOL(_Urem);
+EXPORT_SYMBOL(_Mul);
+EXPORT_SYMBOL(_Umul);
+EXPORT_SYMBOL(_Div);
+EXPORT_SYMBOL(_Udiv);
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+EXPORT_SYMBOL(do_BUG);
+#endif
+
+/* Sun Power Management Idle Handler */
+EXPORT_SYMBOL(pm_idle);
+
+EXPORT_SYMBOL(empty_zero_page);
# endif
#endif
-#ifdef CONFIG_IRQBALANCE
-extern int irqbalance_disable(char *str);
-#endif
-
#ifdef CONFIG_HOTPLUG_CPU
#include <linux/cpumask.h>
- extern void fixup_irqs(cpumask_t map);
+ extern void fixup_irqs(void);
#endif
extern unsigned int do_IRQ(struct pt_regs *regs);
#else
static struct irq_cfg irq_cfgx[NR_IRQS] = {
#endif
- [0] = { .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, },
- [1] = { .domain = CPU_MASK_ALL, .vector = IRQ1_VECTOR, },
- [2] = { .domain = CPU_MASK_ALL, .vector = IRQ2_VECTOR, },
- [3] = { .domain = CPU_MASK_ALL, .vector = IRQ3_VECTOR, },
- [4] = { .domain = CPU_MASK_ALL, .vector = IRQ4_VECTOR, },
- [5] = { .domain = CPU_MASK_ALL, .vector = IRQ5_VECTOR, },
- [6] = { .domain = CPU_MASK_ALL, .vector = IRQ6_VECTOR, },
- [7] = { .domain = CPU_MASK_ALL, .vector = IRQ7_VECTOR, },
- [8] = { .domain = CPU_MASK_ALL, .vector = IRQ8_VECTOR, },
- [9] = { .domain = CPU_MASK_ALL, .vector = IRQ9_VECTOR, },
- [10] = { .domain = CPU_MASK_ALL, .vector = IRQ10_VECTOR, },
- [11] = { .domain = CPU_MASK_ALL, .vector = IRQ11_VECTOR, },
- [12] = { .domain = CPU_MASK_ALL, .vector = IRQ12_VECTOR, },
- [13] = { .domain = CPU_MASK_ALL, .vector = IRQ13_VECTOR, },
- [14] = { .domain = CPU_MASK_ALL, .vector = IRQ14_VECTOR, },
- [15] = { .domain = CPU_MASK_ALL, .vector = IRQ15_VECTOR, },
+ [0] = { .vector = IRQ0_VECTOR, },
+ [1] = { .vector = IRQ1_VECTOR, },
+ [2] = { .vector = IRQ2_VECTOR, },
+ [3] = { .vector = IRQ3_VECTOR, },
+ [4] = { .vector = IRQ4_VECTOR, },
+ [5] = { .vector = IRQ5_VECTOR, },
+ [6] = { .vector = IRQ6_VECTOR, },
+ [7] = { .vector = IRQ7_VECTOR, },
+ [8] = { .vector = IRQ8_VECTOR, },
+ [9] = { .vector = IRQ9_VECTOR, },
+ [10] = { .vector = IRQ10_VECTOR, },
+ [11] = { .vector = IRQ11_VECTOR, },
+ [12] = { .vector = IRQ12_VECTOR, },
+ [13] = { .vector = IRQ13_VECTOR, },
+ [14] = { .vector = IRQ14_VECTOR, },
+ [15] = { .vector = IRQ15_VECTOR, },
};
-void __init arch_early_irq_init(void)
+int __init arch_early_irq_init(void)
{
struct irq_cfg *cfg;
struct irq_desc *desc;
for (i = 0; i < count; i++) {
desc = irq_to_desc(i);
desc->chip_data = &cfg[i];
+ alloc_bootmem_cpumask_var(&cfg[i].domain);
+ alloc_bootmem_cpumask_var(&cfg[i].old_domain);
+ if (i < NR_IRQS_LEGACY)
+ cpumask_setall(cfg[i].domain);
}
+
+ return 0;
}
#ifdef CONFIG_SPARSE_IRQ
/* Mark the inuse vectors */
for_each_irq_desc(irq, desc) {
- if (!desc)
- continue;
cfg = desc->chip_data;
- if (!cpu_isset(cpu, cfg->domain))
+ if (!cpumask_test_cpu(cpu, cfg->domain))
continue;
vector = cfg->vector;
per_cpu(vector_irq, cpu)[vector] = irq;
get_task_struct(p);
read_unlock(&tasklist_lock);
+ if (!alloc_cpumask_var(&cpus_allowed, GFP_KERNEL)) {
+ retval = -ENOMEM;
+ goto out_put_task;
+ }
+ if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) {
+ retval = -ENOMEM;
+ goto out_free_cpus_allowed;
+ }
retval = -EPERM;
- if ((current->euid != p->euid) && (current->euid != p->uid) &&
- !capable(CAP_SYS_NICE))
+ if (!check_same_owner(p) && !capable(CAP_SYS_NICE))
goto out_unlock;
retval = security_task_setscheduler(p, 0, NULL);
/* Schedule the tick, if we are at least one jiffie off */
if ((long)delta_jiffies >= 1) {
+ /*
+ * calculate the expiry time for the next timer wheel
+ * timer
+ */
+ expires = ktime_add_ns(last_update, tick_period.tv64 *
+ delta_jiffies);
+
+ /*
+ * If this cpu is the one which updates jiffies, then
+ * give up the assignment and let it be taken by the
+ * cpu which runs the tick timer next, which might be
+ * this cpu as well. If we don't drop this here the
+ * jiffies might be stale and do_timer() never
+ * invoked.
+ */
+ if (cpu == tick_do_timer_cpu)
+ tick_do_timer_cpu = TICK_DO_TIMER_NONE;
+
if (delta_jiffies > 1)
- cpu_set(cpu, nohz_cpu_mask);
+ cpumask_set_cpu(cpu, nohz_cpu_mask);
+
+ /* Skip reprogram of event if its not changed */
+ if (ts->tick_stopped && ktime_equal(expires, dev->next_event))
+ goto out;
+
/*
* nohz_stop_sched_tick can be called several times before
* the nohz_restart_sched_tick is called. This happens when
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff