* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/ptrace.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/sbus.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/hardirq.h>
#include <asm/starfire.h>
#include <asm/uaccess.h>
#include <asm/cache.h>
#include <asm/cpudata.h>
-
-#ifdef CONFIG_SMP
-static void distribute_irqs(void);
-#endif
+#include <asm/auxio.h>
+#include <asm/head.h>
/* UPA nodes send interrupt packet to UltraSparc with first data reg
* value low 5 (7 on Starfire) bits holding the IRQ identifier being
* The IVEC handler does not need to act atomically, the PIL dispatch
* code uses CAS to get an atomic snapshot of the list and clear it
* at the same time.
+ *
+ * If you make changes to ino_bucket, please update hand coded assembler
+ * of the vectored interrupt trap handler(s) in entry.S and sun4v_ivec.S
*/
+struct ino_bucket {
+ /* Next handler in per-CPU IRQ worklist. We know that
+ * bucket pointers have the high 32-bits clear, so to
+ * save space we only store the bits we need.
+ */
+/*0x00*/unsigned int irq_chain;
+ /* Virtual interrupt number assigned to this INO. */
+/*0x04*/unsigned int virt_irq;
+};
+
+#define NUM_IVECS (IMAP_INR + 1)
struct ino_bucket ivector_table[NUM_IVECS] __attribute__ ((aligned (SMP_CACHE_BYTES)));
+#define __irq_ino(irq) \
+ (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
+#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
+#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
+
/* This has to be in the main kernel image, it cannot be
* turned into per-cpu data. The reason is that the main
* kernel image is locked into the TLB and this structure
* access to this structure takes a TLB miss it could cause
* the 5-level sparc v9 trap stack to overflow.
*/
-struct irq_work_struct {
- unsigned int irq_worklists[16];
-};
-struct irq_work_struct __irq_work[NR_CPUS];
-#define irq_work(__cpu, __pil) &(__irq_work[(__cpu)].irq_worklists[(__pil)])
+#define irq_work(__cpu) &(trap_block[(__cpu)].irq_worklist)
-#ifdef CONFIG_PCI
-/* This is a table of physical addresses used to deal with IBF_DMA_SYNC.
- * It is used for PCI only to synchronize DMA transfers with IRQ delivery
- * for devices behind busses other than APB on Sabre systems.
- *
- * Currently these physical addresses are just config space accesses
- * to the command register for that device.
- */
-unsigned long pci_dma_wsync;
-unsigned long dma_sync_reg_table[256];
-unsigned char dma_sync_reg_table_entry = 0;
-#endif
+static unsigned int virt_to_real_irq_table[NR_IRQS];
+static unsigned char virt_irq_cur = 1;
-/* This is based upon code in the 32-bit Sparc kernel written mostly by
- * David Redman (djhr@tadpole.co.uk).
- */
-#define MAX_STATIC_ALLOC 4
-static struct irqaction static_irqaction[MAX_STATIC_ALLOC];
-static int static_irq_count;
-
-/* This is exported so that fast IRQ handlers can get at it... -DaveM */
-struct irqaction *irq_action[NR_IRQS+1] = {
- NULL, NULL, NULL, NULL, NULL, NULL , NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL , NULL, NULL
-};
+static unsigned char virt_irq_alloc(unsigned int real_irq)
+{
+ unsigned char ent;
-/* This only synchronizes entities which modify IRQ handler
- * state and some selected user-level spots that want to
- * read things in the table. IRQ handler processing orders
- * its' accesses such that no locking is needed.
- */
-static spinlock_t irq_action_lock = SPIN_LOCK_UNLOCKED;
+ BUILD_BUG_ON(NR_IRQS >= 256);
-static void register_irq_proc (unsigned int irq);
+ ent = virt_irq_cur;
+ if (ent >= NR_IRQS) {
+ printk(KERN_ERR "IRQ: Out of virtual IRQs.\n");
+ return 0;
+ }
-/*
- * Upper 2b of irqaction->flags holds the ino.
- * irqaction->mask holds the smp affinity information.
- */
-#define put_ino_in_irqaction(action, irq) \
- action->flags &= 0xffffffffffffUL; \
- if (__bucket(irq) == &pil0_dummy_bucket) \
- action->flags |= 0xdeadUL << 48; \
- else \
- action->flags |= __irq_ino(irq) << 48;
-#define get_ino_in_irqaction(action) (action->flags >> 48)
-
-#if NR_CPUS > 64
-#error irqaction embedded smp affinity does not work with > 64 cpus, FIXME
+ virt_irq_cur = ent + 1;
+ virt_to_real_irq_table[ent] = real_irq;
+
+ return ent;
+}
+
+#if 0 /* Currently unused. */
+static unsigned char real_to_virt_irq(unsigned int real_irq)
+{
+ struct ino_bucket *bucket = __bucket(real_irq);
+
+ return bucket->virt_irq;
+}
#endif
-#define put_smpaff_in_irqaction(action, smpaff) (action)->mask = (smpaff)
-#define get_smpaff_in_irqaction(action) ((action)->mask)
+static unsigned int virt_to_real_irq(unsigned char virt_irq)
+{
+ return virt_to_real_irq_table[virt_irq];
+}
+
+/*
+ * /proc/interrupts printing:
+ */
int show_interrupts(struct seq_file *p, void *v)
{
+ int i = *(loff_t *) v, j;
+ struct irqaction * action;
unsigned long flags;
- int i = *(loff_t *) v;
- struct irqaction *action;
-#ifdef CONFIG_SMP
- int j;
-#endif
- spin_lock_irqsave(&irq_action_lock, flags);
- if (i <= NR_IRQS) {
- if (!(action = *(i + irq_action)))
- goto out_unlock;
- seq_printf(p, "%3d: ", i);
+ 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 (j = 0; j < NR_CPUS; j++) {
- if (!cpu_online(j))
- continue;
- seq_printf(p, "%10u ",
- kstat_cpu(j).irqs[i]);
- }
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
- seq_printf(p, " %s:%lx", action->name,
- get_ino_in_irqaction(action));
- for (action = action->next; action; action = action->next) {
- seq_printf(p, ", %s:%lx", action->name,
- get_ino_in_irqaction(action));
- }
+ 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);
}
-out_unlock:
- spin_unlock_irqrestore(&irq_action_lock, flags);
-
return 0;
}
-/* Now these are always passed a true fully specified sun4u INO. */
-void enable_irq(unsigned int irq)
-{
- struct ino_bucket *bucket = __bucket(irq);
- unsigned long imap;
- unsigned long tid;
+extern unsigned long real_hard_smp_processor_id(void);
- imap = bucket->imap;
- if (imap == 0UL)
- return;
-
- preempt_disable();
+static unsigned int sun4u_compute_tid(unsigned long imap, unsigned long cpuid)
+{
+ unsigned int tid;
- if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- unsigned long ver;
+ 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;
- __asm__ ("rdpr %%ver, %0" : "=r" (ver));
- if ((ver >> 32) == 0x003e0016) {
- /* We set it to our JBUS ID. */
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (tid)
- : "i" (ASI_JBUS_CONFIG));
- tid = ((tid & (0x1fUL<<17)) << 9);
- tid &= IMAP_TID_JBUS;
+ tid = ((a << IMAP_AID_SHIFT) |
+ (n << IMAP_NID_SHIFT));
+ tid &= (IMAP_AID_SAFARI |
+ IMAP_NID_SAFARI);;
+ }
} else {
- /* We set it to our Safari AID. */
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (tid)
- : "i" (ASI_SAFARI_CONFIG));
- tid = ((tid & (0x3ffUL<<17)) << 9);
- tid &= IMAP_AID_SAFARI;
+ tid = cpuid << IMAP_TID_SHIFT;
+ tid &= IMAP_TID_UPA;
}
- } else if (this_is_starfire == 0) {
- /* We set it to our UPA MID. */
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (tid)
- : "i" (ASI_UPA_CONFIG));
- tid = ((tid & UPA_CONFIG_MID) << 9);
- tid &= IMAP_TID_UPA;
- } else {
- tid = (starfire_translate(imap, smp_processor_id()) << 26);
- tid &= IMAP_TID_UPA;
}
- /* NOTE NOTE NOTE, IGN and INO are read-only, IGN is a product
- * of this SYSIO's preconfigured IGN in the SYSIO Control
- * Register, the hardware just mirrors that value here.
- * However for Graphics and UPA Slave devices the full
- * IMAP_INR field can be set by the programmer here.
- *
- * Things like FFB can now be handled via the new IRQ mechanism.
- */
- upa_writel(tid | IMAP_VALID, imap);
-
- preempt_enable();
+ return tid;
}
-/* This now gets passed true ino's as well. */
-void disable_irq(unsigned int irq)
-{
- struct ino_bucket *bucket = __bucket(irq);
- unsigned long imap;
-
- imap = bucket->imap;
- if (imap != 0UL) {
- u32 tmp;
-
- /* NOTE: We do not want to futz with the IRQ clear registers
- * and move the state to IDLE, the SCSI code does call
- * disable_irq() to assure atomicity in the queue cmd
- * SCSI adapter driver code. Thus we'd lose interrupts.
- */
- tmp = upa_readl(imap);
- tmp &= ~IMAP_VALID;
- upa_writel(tmp, imap);
- }
-}
+struct irq_handler_data {
+ unsigned long iclr;
+ unsigned long imap;
-/* The timer is the one "weird" interrupt which is generated by
- * the CPU %tick register and not by some normal vectored interrupt
- * source. To handle this special case, we use this dummy INO bucket.
- */
-static struct ino_bucket pil0_dummy_bucket = {
- 0, /* irq_chain */
- 0, /* pil */
- 0, /* pending */
- 0, /* flags */
- 0, /* __unused */
- NULL, /* irq_info */
- 0UL, /* iclr */
- 0UL, /* imap */
+ void (*pre_handler)(unsigned int, void *, void *);
+ void *pre_handler_arg1;
+ void *pre_handler_arg2;
};
-unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap)
+static inline struct ino_bucket *virt_irq_to_bucket(unsigned int virt_irq)
{
- struct ino_bucket *bucket;
- int ino;
-
- if (pil == 0) {
- if (iclr != 0UL || imap != 0UL) {
- prom_printf("Invalid dummy bucket for PIL0 (%lx:%lx)\n",
- iclr, imap);
- prom_halt();
- }
- return __irq(&pil0_dummy_bucket);
- }
+ unsigned int real_irq = virt_to_real_irq(virt_irq);
+ struct ino_bucket *bucket = NULL;
- /* RULE: Both must be specified in all other cases. */
- if (iclr == 0UL || imap == 0UL) {
- prom_printf("Invalid build_irq %d %d %016lx %016lx\n",
- pil, inofixup, iclr, imap);
- prom_halt();
- }
-
- ino = (upa_readl(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
- if (ino > NUM_IVECS) {
- prom_printf("Invalid INO %04x (%d:%d:%016lx:%016lx)\n",
- ino, pil, inofixup, iclr, imap);
- prom_halt();
- }
-
- /* Ok, looks good, set it up. Don't touch the irq_chain or
- * the pending flag.
- */
- bucket = &ivector_table[ino];
- if ((bucket->flags & IBF_ACTIVE) ||
- (bucket->irq_info != NULL)) {
- /* This is a gross fatal error if it happens here. */
- prom_printf("IRQ: Trying to reinit INO bucket, fatal error.\n");
- prom_printf("IRQ: Request INO %04x (%d:%d:%016lx:%016lx)\n",
- ino, pil, inofixup, iclr, imap);
- prom_printf("IRQ: Existing (%d:%016lx:%016lx)\n",
- bucket->pil, bucket->iclr, bucket->imap);
- prom_printf("IRQ: Cannot continue, halting...\n");
- prom_halt();
- }
- bucket->imap = imap;
- bucket->iclr = iclr;
- bucket->pil = pil;
- bucket->flags = 0;
-
- bucket->irq_info = NULL;
+ if (likely(real_irq))
+ bucket = __bucket(real_irq);
- return __irq(bucket);
+ return bucket;
}
-static void atomic_bucket_insert(struct ino_bucket *bucket)
+#ifdef CONFIG_SMP
+static int irq_choose_cpu(unsigned int virt_irq)
{
- unsigned long pstate;
- unsigned int *ent;
-
- __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
- __asm__ __volatile__("wrpr %0, %1, %%pstate"
- : : "r" (pstate), "i" (PSTATE_IE));
- ent = irq_work(smp_processor_id(), bucket->pil);
- bucket->irq_chain = *ent;
- *ent = __irq(bucket);
- __asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
-}
+ cpumask_t mask = irq_desc[virt_irq].affinity;
+ int cpuid;
-int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags, const char *name, void *dev_id)
-{
- struct irqaction *action, *tmp = NULL;
- struct ino_bucket *bucket = __bucket(irq);
- unsigned long flags;
- int pending = 0;
-
- if ((bucket != &pil0_dummy_bucket) &&
- (bucket < &ivector_table[0] ||
- bucket >= &ivector_table[NUM_IVECS])) {
- unsigned int *caller;
-
- __asm__ __volatile__("mov %%i7, %0" : "=r" (caller));
- printk(KERN_CRIT "request_irq: Old style IRQ registry attempt "
- "from %p, irq %08x.\n", caller, irq);
- return -EINVAL;
- }
- if (!handler)
- return -EINVAL;
-
- if ((bucket != &pil0_dummy_bucket) && (irqflags & SA_SAMPLE_RANDOM)) {
- /*
- * This function might sleep, we want to call it first,
- * outside of the atomic block. In SA_STATIC_ALLOC case,
- * random driver's kmalloc will fail, but it is safe.
- * If already initialized, random driver will not reinit.
- * Yes, this might clear the entropy pool if the wrong
- * driver is attempted to be loaded, without actually
- * installing a new handler, but is this really a problem,
- * only the sysadmin is able to do this.
- */
- rand_initialize_irq(irq);
- }
+ if (cpus_equal(mask, CPU_MASK_ALL)) {
+ static int irq_rover;
+ static DEFINE_SPINLOCK(irq_rover_lock);
+ unsigned long flags;
- spin_lock_irqsave(&irq_action_lock, flags);
+ /* Round-robin distribution... */
+ do_round_robin:
+ spin_lock_irqsave(&irq_rover_lock, flags);
- action = *(bucket->pil + irq_action);
- if (action) {
- if ((action->flags & SA_SHIRQ) && (irqflags & SA_SHIRQ))
- for (tmp = action; tmp->next; tmp = tmp->next)
- ;
- else {
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return -EBUSY;
+ while (!cpu_online(irq_rover)) {
+ if (++irq_rover >= NR_CPUS)
+ irq_rover = 0;
}
- action = NULL; /* Or else! */
- }
+ cpuid = irq_rover;
+ do {
+ if (++irq_rover >= NR_CPUS)
+ irq_rover = 0;
+ } while (!cpu_online(irq_rover));
- /* If this is flagged as statically allocated then we use our
- * private struct which is never freed.
- */
- if (irqflags & SA_STATIC_ALLOC) {
- if (static_irq_count < MAX_STATIC_ALLOC)
- action = &static_irqaction[static_irq_count++];
- else
- printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed "
- "using kmalloc\n", irq, name);
- }
- if (action == NULL)
- action = (struct irqaction *)kmalloc(sizeof(struct irqaction),
- GFP_ATOMIC);
-
- if (!action) {
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return -ENOMEM;
- }
-
- if (bucket == &pil0_dummy_bucket) {
- bucket->irq_info = action;
- bucket->flags |= IBF_ACTIVE;
+ spin_unlock_irqrestore(&irq_rover_lock, flags);
} else {
- if ((bucket->flags & IBF_ACTIVE) != 0) {
- void *orig = bucket->irq_info;
- void **vector = NULL;
-
- if ((bucket->flags & IBF_PCI) == 0) {
- printk("IRQ: Trying to share non-PCI bucket.\n");
- goto free_and_ebusy;
- }
- if ((bucket->flags & IBF_MULTI) == 0) {
- vector = kmalloc(sizeof(void *) * 4, GFP_ATOMIC);
- if (vector == NULL)
- goto free_and_enomem;
-
- /* We might have slept. */
- if ((bucket->flags & IBF_MULTI) != 0) {
- int ent;
-
- kfree(vector);
- vector = (void **)bucket->irq_info;
- for(ent = 0; ent < 4; ent++) {
- if (vector[ent] == NULL) {
- vector[ent] = action;
- break;
- }
- }
- if (ent == 4)
- goto free_and_ebusy;
- } else {
- vector[0] = orig;
- vector[1] = action;
- vector[2] = NULL;
- vector[3] = NULL;
- bucket->irq_info = vector;
- bucket->flags |= IBF_MULTI;
- }
- } else {
- int ent;
-
- vector = (void **)orig;
- for (ent = 0; ent < 4; ent++) {
- if (vector[ent] == NULL) {
- vector[ent] = action;
- break;
- }
- }
- if (ent == 4)
- goto free_and_ebusy;
- }
- } else {
- bucket->irq_info = action;
- bucket->flags |= IBF_ACTIVE;
- }
- pending = bucket->pending;
- if (pending)
- bucket->pending = 0;
- }
+ cpumask_t tmp;
- action->handler = handler;
- action->flags = irqflags;
- action->name = name;
- action->next = NULL;
- action->dev_id = dev_id;
- put_ino_in_irqaction(action, irq);
- put_smpaff_in_irqaction(action, 0);
+ cpus_and(tmp, cpu_online_map, mask);
- if (tmp)
- tmp->next = action;
- else
- *(bucket->pil + irq_action) = action;
+ if (cpus_empty(tmp))
+ goto do_round_robin;
- enable_irq(irq);
-
- /* We ate the IVEC already, this makes sure it does not get lost. */
- if (pending) {
- atomic_bucket_insert(bucket);
- set_softint(1 << bucket->pil);
+ cpuid = first_cpu(tmp);
}
- spin_unlock_irqrestore(&irq_action_lock, flags);
- if ((bucket != &pil0_dummy_bucket) && (!(irqflags & SA_STATIC_ALLOC)))
- register_irq_proc(__irq_ino(irq));
-
-#ifdef CONFIG_SMP
- distribute_irqs();
-#endif
- return 0;
-free_and_ebusy:
- kfree(action);
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return -EBUSY;
-
-free_and_enomem:
- kfree(action);
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return -ENOMEM;
+ return cpuid;
}
+#else
+static int irq_choose_cpu(unsigned int virt_irq)
+{
+ return real_hard_smp_processor_id();
+}
+#endif
-EXPORT_SYMBOL(request_irq);
-
-void free_irq(unsigned int irq, void *dev_id)
+static void sun4u_irq_enable(unsigned int virt_irq)
{
- struct irqaction *action;
- struct irqaction *tmp = NULL;
- unsigned long flags;
- struct ino_bucket *bucket = __bucket(irq), *bp;
+ irq_desc_t *desc = irq_desc + virt_irq;
+ struct irq_handler_data *data = desc->handler_data;
- if ((bucket != &pil0_dummy_bucket) &&
- (bucket < &ivector_table[0] ||
- bucket >= &ivector_table[NUM_IVECS])) {
- unsigned int *caller;
+ if (likely(data)) {
+ unsigned long cpuid, imap;
+ unsigned int tid;
- __asm__ __volatile__("mov %%i7, %0" : "=r" (caller));
- printk(KERN_CRIT "free_irq: Old style IRQ removal attempt "
- "from %p, irq %08x.\n", caller, irq);
- return;
- }
-
- spin_lock_irqsave(&irq_action_lock, flags);
+ cpuid = irq_choose_cpu(virt_irq);
+ imap = data->imap;
- action = *(bucket->pil + irq_action);
- if (!action->handler) {
- printk("Freeing free IRQ %d\n", bucket->pil);
- return;
- }
- if (dev_id) {
- for ( ; action; action = action->next) {
- if (action->dev_id == dev_id)
- break;
- tmp = action;
- }
- if (!action) {
- printk("Trying to free free shared IRQ %d\n", bucket->pil);
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return;
- }
- } else if (action->flags & SA_SHIRQ) {
- printk("Trying to free shared IRQ %d with NULL device ID\n", bucket->pil);
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return;
- }
+ tid = sun4u_compute_tid(imap, cpuid);
- if (action->flags & SA_STATIC_ALLOC) {
- printk("Attempt to free statically allocated IRQ %d (%s)\n",
- bucket->pil, action->name);
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return;
+ upa_writel(tid | IMAP_VALID, imap);
}
+}
- if (action && tmp)
- tmp->next = action->next;
- else
- *(bucket->pil + irq_action) = action->next;
-
- spin_unlock_irqrestore(&irq_action_lock, flags);
-
- synchronize_irq(irq);
-
- spin_lock_irqsave(&irq_action_lock, flags);
-
- if (bucket != &pil0_dummy_bucket) {
- unsigned long imap = bucket->imap;
- void **vector, *orig;
- int ent;
-
- orig = bucket->irq_info;
- vector = (void **)orig;
-
- if ((bucket->flags & IBF_MULTI) != 0) {
- int other = 0;
- void *orphan = NULL;
- for (ent = 0; ent < 4; ent++) {
- if (vector[ent] == action)
- vector[ent] = NULL;
- else if (vector[ent] != NULL) {
- orphan = vector[ent];
- other++;
- }
- }
-
- /* Only free when no other shared irq
- * uses this bucket.
- */
- if (other) {
- if (other == 1) {
- /* Convert back to non-shared bucket. */
- bucket->irq_info = orphan;
- bucket->flags &= ~(IBF_MULTI);
- kfree(vector);
- }
- goto out;
- }
- } else {
- bucket->irq_info = NULL;
- }
+static void sun4u_irq_disable(unsigned int virt_irq)
+{
+ irq_desc_t *desc = irq_desc + virt_irq;
+ struct irq_handler_data *data = desc->handler_data;
- /* This unique interrupt source is now inactive. */
- bucket->flags &= ~IBF_ACTIVE;
-
- /* See if any other buckets share this bucket's IMAP
- * and are still active.
- */
- for (ent = 0; ent < NUM_IVECS; ent++) {
- bp = &ivector_table[ent];
- if (bp != bucket &&
- bp->imap == imap &&
- (bp->flags & IBF_ACTIVE) != 0)
- break;
- }
+ if (likely(data)) {
+ unsigned long imap = data->imap;
+ u32 tmp = upa_readl(imap);
- /* Only disable when no other sub-irq levels of
- * the same IMAP are active.
- */
- if (ent == NUM_IVECS)
- disable_irq(irq);
+ tmp &= ~IMAP_VALID;
+ upa_writel(tmp, imap);
}
-
-out:
- kfree(action);
- spin_unlock_irqrestore(&irq_action_lock, flags);
}
-EXPORT_SYMBOL(free_irq);
-
-#ifdef CONFIG_SMP
-void synchronize_irq(unsigned int irq)
+static void sun4u_irq_end(unsigned int virt_irq)
{
- struct ino_bucket *bucket = __bucket(irq);
-
-#if 0
- /* The following is how I wish I could implement this.
- * Unfortunately the ICLR registers are read-only, you can
- * only write ICLR_foo values to them. To get the current
- * IRQ status you would need to get at the IRQ diag registers
- * in the PCI/SBUS controller and the layout of those vary
- * from one controller to the next, sigh... -DaveM
- */
- unsigned long iclr = bucket->iclr;
-
- while (1) {
- u32 tmp = upa_readl(iclr);
-
- if (tmp == ICLR_TRANSMIT ||
- tmp == ICLR_PENDING) {
- cpu_relax();
- continue;
- }
- break;
- }
-#else
- /* So we have to do this with a INPROGRESS bit just like x86. */
- while (bucket->flags & IBF_INPROGRESS)
- cpu_relax();
-#endif
-}
-#endif /* CONFIG_SMP */
+ irq_desc_t *desc = irq_desc + virt_irq;
+ struct irq_handler_data *data = desc->handler_data;
-void catch_disabled_ivec(struct pt_regs *regs)
-{
- int cpu = smp_processor_id();
- struct ino_bucket *bucket = __bucket(*irq_work(cpu, 0));
-
- /* We can actually see this on Ultra/PCI PCI cards, which are bridges
- * to other devices. Here a single IMAP enabled potentially multiple
- * unique interrupt sources (which each do have a unique ICLR register.
- *
- * So what we do is just register that the IVEC arrived, when registered
- * for real the request_irq() code will check the bit and signal
- * a local CPU interrupt for it.
- */
-#if 0
- printk("IVEC: Spurious interrupt vector (%x) received at (%016lx)\n",
- bucket - &ivector_table[0], regs->tpc);
-#endif
- *irq_work(cpu, 0) = 0;
- bucket->pending = 1;
+ if (likely(data))
+ upa_writel(ICLR_IDLE, data->iclr);
}
-/* Tune this... */
-#define FORWARD_VOLUME 12
-
-#ifdef CONFIG_SMP
-
-static inline void redirect_intr(int cpu, struct ino_bucket *bp)
+static void sun4v_irq_enable(unsigned int virt_irq)
{
- /* Ok, here is what is going on:
- * 1) Retargeting IRQs on Starfire is very
- * expensive so just forget about it on them.
- * 2) Moving around very high priority interrupts
- * is a losing game.
- * 3) If the current cpu is idle, interrupts are
- * useful work, so keep them here. But do not
- * pass to our neighbour if he is not very idle.
- * 4) If sysadmin explicitly asks for directed intrs,
- * Just Do It.
- */
- struct irqaction *ap = bp->irq_info;
- cpumask_t cpu_mask = get_smpaff_in_irqaction(ap);
- unsigned int buddy, ticks;
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = bucket - &ivector_table[0];
- cpus_and(cpu_mask, cpu_mask, cpu_online_map);
- if (cpus_empty(cpu_mask))
- cpu_mask = cpu_online_map;
+ if (likely(bucket)) {
+ unsigned long cpuid;
+ int err;
- if (this_is_starfire != 0 ||
- bp->pil >= 10 || current->pid == 0)
- goto out;
+ cpuid = irq_choose_cpu(virt_irq);
- /* 'cpu' is the MID (ie. UPAID), calculate the MID
- * of our buddy.
- */
- buddy = cpu + 1;
- if (buddy >= NR_CPUS)
- buddy = 0;
-
- ticks = 0;
- while (!cpu_isset(buddy, cpu_mask)) {
- if (++buddy >= NR_CPUS)
- buddy = 0;
- if (++ticks > NR_CPUS) {
- put_smpaff_in_irqaction(ap, 0);
- goto out;
- }
+ err = sun4v_intr_settarget(ino, cpuid);
+ if (err != HV_EOK)
+ printk("sun4v_intr_settarget(%x,%lu): err(%d)\n",
+ ino, cpuid, err);
+ err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
+ if (err != HV_EOK)
+ printk("sun4v_intr_setenabled(%x): err(%d)\n",
+ ino, err);
}
+}
- if (buddy == cpu)
- goto out;
+static void sun4v_irq_disable(unsigned int virt_irq)
+{
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = bucket - &ivector_table[0];
- /* Voo-doo programming. */
- if (cpu_data(buddy).idle_volume < FORWARD_VOLUME)
- goto out;
+ if (likely(bucket)) {
+ int err;
- /* This just so happens to be correct on Cheetah
- * at the moment.
- */
- buddy <<= 26;
+ err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
+ if (err != HV_EOK)
+ printk("sun4v_intr_setenabled(%x): "
+ "err(%d)\n", ino, err);
+ }
+}
- /* Push it to our buddy. */
- upa_writel(buddy | IMAP_VALID, bp->imap);
+static void sun4v_irq_end(unsigned int virt_irq)
+{
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = bucket - &ivector_table[0];
-out:
- return;
-}
+ if (likely(bucket)) {
+ int err;
-#endif
+ err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+ if (err != HV_EOK)
+ printk("sun4v_intr_setstate(%x): "
+ "err(%d)\n", ino, err);
+ }
+}
-void handler_irq(int irq, struct pt_regs *regs)
+static void run_pre_handler(unsigned int virt_irq)
{
- struct ino_bucket *bp, *nbp;
- int cpu = smp_processor_id();
-
-#ifndef CONFIG_SMP
- /*
- * Check for TICK_INT on level 14 softint.
- */
- {
- unsigned long clr_mask = 1 << irq;
- unsigned long tick_mask = tick_ops->softint_mask;
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ irq_desc_t *desc = irq_desc + virt_irq;
+ struct irq_handler_data *data = desc->handler_data;
- if ((irq == 14) && (get_softint() & tick_mask)) {
- irq = 0;
- clr_mask = tick_mask;
- }
- clear_softint(clr_mask);
+ if (likely(data->pre_handler)) {
+ data->pre_handler(__irq_ino(__irq(bucket)),
+ data->pre_handler_arg1,
+ data->pre_handler_arg2);
}
-#else
- int should_forward = 1;
+}
- clear_softint(1 << irq);
-#endif
+static struct irq_chip sun4u_irq = {
+ .typename = "sun4u",
+ .enable = sun4u_irq_enable,
+ .disable = sun4u_irq_disable,
+ .end = sun4u_irq_end,
+};
- irq_enter();
- kstat_this_cpu.irqs[irq]++;
+static struct irq_chip sun4u_irq_ack = {
+ .typename = "sun4u+ack",
+ .enable = sun4u_irq_enable,
+ .disable = sun4u_irq_disable,
+ .ack = run_pre_handler,
+ .end = sun4u_irq_end,
+};
- /* Sliiiick... */
-#ifndef CONFIG_SMP
- bp = ((irq != 0) ?
- __bucket(xchg32(irq_work(cpu, irq), 0)) :
- &pil0_dummy_bucket);
-#else
- bp = __bucket(xchg32(irq_work(cpu, irq), 0));
-#endif
- for ( ; bp != NULL; bp = nbp) {
- unsigned char flags = bp->flags;
- unsigned char random = 0;
+static struct irq_chip sun4v_irq = {
+ .typename = "sun4v",
+ .enable = sun4v_irq_enable,
+ .disable = sun4v_irq_disable,
+ .end = sun4v_irq_end,
+};
- nbp = __bucket(bp->irq_chain);
- bp->irq_chain = 0;
+static struct irq_chip sun4v_irq_ack = {
+ .typename = "sun4v+ack",
+ .enable = sun4v_irq_enable,
+ .disable = sun4v_irq_disable,
+ .ack = run_pre_handler,
+ .end = sun4v_irq_end,
+};
- bp->flags |= IBF_INPROGRESS;
+void irq_install_pre_handler(int virt_irq,
+ void (*func)(unsigned int, void *, void *),
+ void *arg1, void *arg2)
+{
+ irq_desc_t *desc = irq_desc + virt_irq;
+ struct irq_handler_data *data = desc->handler_data;
- if ((flags & IBF_ACTIVE) != 0) {
-#ifdef CONFIG_PCI
- if ((flags & IBF_DMA_SYNC) != 0) {
- upa_readl(dma_sync_reg_table[bp->synctab_ent]);
- upa_readq(pci_dma_wsync);
- }
-#endif
- if ((flags & IBF_MULTI) == 0) {
- struct irqaction *ap = bp->irq_info;
- ap->handler(__irq(bp), ap->dev_id, regs);
- random |= ap->flags & SA_SAMPLE_RANDOM;
- } else {
- void **vector = (void **)bp->irq_info;
- int ent;
- for (ent = 0; ent < 4; ent++) {
- struct irqaction *ap = vector[ent];
- if (ap != NULL) {
- ap->handler(__irq(bp), ap->dev_id, regs);
- random |= ap->flags & SA_SAMPLE_RANDOM;
- }
- }
- }
- /* Only the dummy bucket lacks IMAP/ICLR. */
- if (bp->pil != 0) {
-#ifdef CONFIG_SMP
- if (should_forward) {
- redirect_intr(cpu, bp);
- should_forward = 0;
- }
-#endif
- upa_writel(ICLR_IDLE, bp->iclr);
- /* Test and add entropy */
- if (random)
- add_interrupt_randomness(irq);
- }
- } else
- bp->pending = 1;
+ data->pre_handler = func;
+ data->pre_handler_arg1 = arg1;
+ data->pre_handler_arg2 = arg2;
- bp->flags &= ~IBF_INPROGRESS;
- }
- irq_exit();
-}
+ if (desc->chip == &sun4u_irq_ack ||
+ desc->chip == &sun4v_irq_ack)
+ return;
-#ifdef CONFIG_BLK_DEV_FD
-extern void floppy_interrupt(int irq, void *dev_cookie, struct pt_regs *regs);
+ desc->chip = (desc->chip == &sun4u_irq ?
+ &sun4u_irq_ack : &sun4v_irq_ack);
+}
-void sparc_floppy_irq(int irq, void *dev_cookie, struct pt_regs *regs)
+unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap)
{
- struct irqaction *action = *(irq + irq_action);
struct ino_bucket *bucket;
- int cpu = smp_processor_id();
+ struct irq_handler_data *data;
+ irq_desc_t *desc;
+ int ino;
- irq_enter();
- kstat_this_cpu.irqs[irq]++;
+ BUG_ON(tlb_type == hypervisor);
- *(irq_work(cpu, irq)) = 0;
- bucket = get_ino_in_irqaction(action) + ivector_table;
+ ino = (upa_readl(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
+ bucket = &ivector_table[ino];
+ if (!bucket->virt_irq) {
+ bucket->virt_irq = virt_irq_alloc(__irq(bucket));
+ irq_desc[bucket->virt_irq].chip = &sun4u_irq;
+ }
- bucket->flags |= IBF_INPROGRESS;
+ desc = irq_desc + bucket->virt_irq;
+ if (unlikely(desc->handler_data))
+ goto out;
- floppy_interrupt(irq, dev_cookie, regs);
- upa_writel(ICLR_IDLE, bucket->iclr);
+ data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+ if (unlikely(!data)) {
+ prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
+ prom_halt();
+ }
+ desc->handler_data = data;
- bucket->flags &= ~IBF_INPROGRESS;
+ data->imap = imap;
+ data->iclr = iclr;
- irq_exit();
+out:
+ return bucket->virt_irq;
}
-#endif
-
-/* The following assumes that the branch lies before the place we
- * are branching to. This is the case for a trap vector...
- * You have been warned.
- */
-#define SPARC_BRANCH(dest_addr, inst_addr) \
- (0x10800000 | ((((dest_addr)-(inst_addr))>>2)&0x3fffff))
-#define SPARC_NOP (0x01000000)
-
-static void install_fast_irq(unsigned int cpu_irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *))
+unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
{
- extern unsigned long sparc64_ttable_tl0;
- unsigned long ttent = (unsigned long) &sparc64_ttable_tl0;
- unsigned int *insns;
-
- ttent += 0x820;
- ttent += (cpu_irq - 1) << 5;
- insns = (unsigned int *) ttent;
- insns[0] = SPARC_BRANCH(((unsigned long) handler),
- ((unsigned long)&insns[0]));
- insns[1] = SPARC_NOP;
- __asm__ __volatile__("membar #StoreStore; flush %0" : : "r" (ttent));
-}
+ struct ino_bucket *bucket;
+ struct irq_handler_data *data;
+ unsigned long sysino;
+ irq_desc_t *desc;
-int request_fast_irq(unsigned int irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags, const char *name, void *dev_id)
-{
- struct irqaction *action;
- struct ino_bucket *bucket = __bucket(irq);
- unsigned long flags;
+ BUG_ON(tlb_type != hypervisor);
- /* No pil0 dummy buckets allowed here. */
- if (bucket < &ivector_table[0] ||
- bucket >= &ivector_table[NUM_IVECS]) {
- unsigned int *caller;
-
- __asm__ __volatile__("mov %%i7, %0" : "=r" (caller));
- printk(KERN_CRIT "request_fast_irq: Old style IRQ registry attempt "
- "from %p, irq %08x.\n", caller, irq);
- return -EINVAL;
- }
-
- if (!handler)
- return -EINVAL;
-
- if ((bucket->pil == 0) || (bucket->pil == 14)) {
- printk("request_fast_irq: Trying to register shared IRQ 0 or 14.\n");
- return -EBUSY;
+ sysino = sun4v_devino_to_sysino(devhandle, devino);
+ bucket = &ivector_table[sysino];
+ if (!bucket->virt_irq) {
+ bucket->virt_irq = virt_irq_alloc(__irq(bucket));
+ irq_desc[bucket->virt_irq].chip = &sun4v_irq;
}
- spin_lock_irqsave(&irq_action_lock, flags);
-
- action = *(bucket->pil + irq_action);
- if (action) {
- if (action->flags & SA_SHIRQ)
- panic("Trying to register fast irq when already shared.\n");
- if (irqflags & SA_SHIRQ)
- panic("Trying to register fast irq as shared.\n");
- printk("request_fast_irq: Trying to register yet already owned.\n");
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return -EBUSY;
- }
+ desc = irq_desc + bucket->virt_irq;
+ if (unlikely(desc->handler_data))
+ goto out;
- /*
- * We do not check for SA_SAMPLE_RANDOM in this path. Neither do we
- * support smp intr affinity in this path.
- */
- if (irqflags & SA_STATIC_ALLOC) {
- if (static_irq_count < MAX_STATIC_ALLOC)
- action = &static_irqaction[static_irq_count++];
- else
- printk("Request for IRQ%d (%s) SA_STATIC_ALLOC failed "
- "using kmalloc\n", bucket->pil, name);
- }
- if (action == NULL)
- action = (struct irqaction *)kmalloc(sizeof(struct irqaction),
- GFP_ATOMIC);
- if (!action) {
- spin_unlock_irqrestore(&irq_action_lock, flags);
- return -ENOMEM;
+ data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+ if (unlikely(!data)) {
+ prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
+ prom_halt();
}
- install_fast_irq(bucket->pil, handler);
-
- bucket->irq_info = action;
- bucket->flags |= IBF_ACTIVE;
+ desc->handler_data = data;
- action->handler = handler;
- action->flags = irqflags;
- action->dev_id = NULL;
- action->name = name;
- action->next = NULL;
- put_ino_in_irqaction(action, irq);
- put_smpaff_in_irqaction(action, 0);
-
- *(bucket->pil + irq_action) = action;
- enable_irq(irq);
-
- spin_unlock_irqrestore(&irq_action_lock, flags);
+ /* 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;
-#ifdef CONFIG_SMP
- distribute_irqs();
-#endif
- return 0;
+out:
+ return bucket->virt_irq;
}
-/* We really don't need these at all on the Sparc. We only have
- * stubs here because they are exported to modules.
- */
-unsigned long probe_irq_on(void)
+void ack_bad_irq(unsigned int virt_irq)
{
- return 0;
-}
+ struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+ unsigned int ino = 0xdeadbeef;
-EXPORT_SYMBOL(probe_irq_on);
+ if (bucket)
+ ino = bucket - &ivector_table[0];
-int probe_irq_off(unsigned long mask)
-{
- return 0;
+ printk(KERN_CRIT "Unexpected IRQ from ino[%x] virt_irq[%u]\n",
+ ino, virt_irq);
}
-EXPORT_SYMBOL(probe_irq_off);
+#ifndef CONFIG_SMP
+extern irqreturn_t timer_interrupt(int, void *);
-#ifdef CONFIG_SMP
-static int retarget_one_irq(struct irqaction *p, int goal_cpu)
+void timer_irq(int irq, struct pt_regs *regs)
{
- struct ino_bucket *bucket = get_ino_in_irqaction(p) + ivector_table;
- unsigned long imap = bucket->imap;
- unsigned int tid;
+ unsigned long clr_mask = 1 << irq;
+ unsigned long tick_mask = tick_ops->softint_mask;
+ struct pt_regs *old_regs;
- while (!cpu_online(goal_cpu)) {
- if (++goal_cpu >= NR_CPUS)
- goal_cpu = 0;
+ if (get_softint() & tick_mask) {
+ irq = 0;
+ clr_mask = tick_mask;
}
+ clear_softint(clr_mask);
- if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- tid = goal_cpu << 26;
- tid &= IMAP_AID_SAFARI;
- } else if (this_is_starfire == 0) {
- tid = goal_cpu << 26;
- tid &= IMAP_TID_UPA;
- } else {
- tid = (starfire_translate(imap, goal_cpu) << 26);
- tid &= IMAP_TID_UPA;
- }
- upa_writel(tid | IMAP_VALID, imap);
+ old_regs = set_irq_regs(regs);
+ irq_enter();
- while (!cpu_online(goal_cpu)) {
- if (++goal_cpu >= NR_CPUS)
- goal_cpu = 0;
- }
+ kstat_this_cpu.irqs[0]++;
+ timer_interrupt(irq, NULL);
- return goal_cpu;
+ irq_exit();
+ set_irq_regs(old_regs);
}
+#endif
-/* Called from request_irq. */
-static void distribute_irqs(void)
+void handler_irq(int irq, struct pt_regs *regs)
{
- unsigned long flags;
- int cpu, level;
+ struct ino_bucket *bucket;
+ struct pt_regs *old_regs;
- spin_lock_irqsave(&irq_action_lock, flags);
- cpu = 0;
+ clear_softint(1 << irq);
- /*
- * Skip the timer at [0], and very rare error/power intrs at [15].
- * Also level [12], it causes problems on Ex000 systems.
- */
- for (level = 1; level < NR_IRQS; level++) {
- struct irqaction *p = irq_action[level];
- if (level == 12) continue;
- while(p) {
- cpu = retarget_one_irq(p, cpu);
- p = p->next;
- }
+ old_regs = set_irq_regs(regs);
+ irq_enter();
+
+ /* Sliiiick... */
+ bucket = __bucket(xchg32(irq_work(smp_processor_id()), 0));
+ while (bucket) {
+ struct ino_bucket *next = __bucket(bucket->irq_chain);
+
+ bucket->irq_chain = 0;
+ __do_IRQ(bucket->virt_irq);
+
+ bucket = next;
}
- spin_unlock_irqrestore(&irq_action_lock, flags);
+
+ irq_exit();
+ set_irq_regs(old_regs);
}
-#endif
+struct sun5_timer {
+ u64 count0;
+ u64 limit0;
+ u64 count1;
+ u64 limit1;
+};
-struct sun5_timer *prom_timers;
+static struct sun5_timer *prom_timers;
static u64 prom_limit0, prom_limit1;
static void map_prom_timers(void)
{
- unsigned int addr[3];
- int tnode, err;
+ struct device_node *dp;
+ unsigned int *addr;
/* PROM timer node hangs out in the top level of device siblings... */
- tnode = prom_finddevice("/counter-timer");
+ 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 (tnode == 0 || tnode == -1) {
+ if (!dp) {
prom_timers = (struct sun5_timer *) 0;
return;
}
/* If PROM is really using this, it must be mapped by him. */
- err = prom_getproperty(tnode, "address", (char *)addr, sizeof(addr));
- if (err == -1) {
+ 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;
: "g1", "g2");
}
-void enable_prom_timer(void)
+void init_irqwork_curcpu(void)
{
- if (!prom_timers)
- return;
+ int cpu = hard_smp_processor_id();
- /* Set it to whatever was there before. */
- prom_timers->limit1 = prom_limit1;
- prom_timers->count1 = 0;
- prom_timers->limit0 = prom_limit0;
- prom_timers->count0 = 0;
+ trap_block[cpu].irq_worklist = 0;
}
-void init_irqwork_curcpu(void)
+static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type)
{
- register struct irq_work_struct *workp asm("o2");
- unsigned long tmp;
- int cpu = hard_smp_processor_id();
+ unsigned long num_entries = 128;
+ unsigned long status;
- memset(__irq_work + cpu, 0, sizeof(*workp));
-
- /* Make sure we are called with PSTATE_IE disabled. */
- __asm__ __volatile__("rdpr %%pstate, %0\n\t"
- : "=r" (tmp));
- if (tmp & PSTATE_IE) {
- prom_printf("BUG: init_irqwork_curcpu() called with "
- "PSTATE_IE enabled, bailing.\n");
- __asm__ __volatile__("mov %%i7, %0\n\t"
- : "=r" (tmp));
- prom_printf("BUG: Called from %lx\n", tmp);
+ 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();
}
-
- /* Set interrupt globals. */
- workp = &__irq_work[cpu];
- __asm__ __volatile__(
- "rdpr %%pstate, %0\n\t"
- "wrpr %0, %1, %%pstate\n\t"
- "mov %2, %%g6\n\t"
- "wrpr %0, 0x0, %%pstate\n\t"
- : "=&r" (tmp)
- : "i" (PSTATE_IG), "r" (workp));
}
-/* Only invoked on boot processor. */
-void __init init_IRQ(void)
+static void __cpuinit sun4v_register_mondo_queues(int this_cpu)
{
- map_prom_timers();
- kill_prom_timer();
- memset(&ivector_table[0], 0, sizeof(ivector_table));
-
- /* 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());
+ struct trap_per_cpu *tb = &trap_block[this_cpu];
- /* 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");
+ register_one_mondo(tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO);
+ register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO);
+ register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR);
+ register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR);
}
-static struct proc_dir_entry * root_irq_dir;
-static struct proc_dir_entry * irq_dir [NUM_IVECS];
-
-#ifdef CONFIG_SMP
-
-#define HEX_DIGITS 16
-
-static unsigned int parse_hex_value (const char __user *buffer,
- unsigned long count, unsigned long *ret)
+static void __cpuinit alloc_one_mondo(unsigned long *pa_ptr, int use_bootmem)
{
- unsigned char hexnum [HEX_DIGITS];
- unsigned long value;
- int i;
-
- if (!count)
- return -EINVAL;
- if (count > HEX_DIGITS)
- count = HEX_DIGITS;
- if (copy_from_user(hexnum, buffer, count))
- return -EFAULT;
-
- /*
- * Parse the first 8 characters as a hex string, any non-hex char
- * is end-of-string. '00e1', 'e1', '00E1', 'E1' are all the same.
- */
- value = 0;
+ void *page;
- for (i = 0; i < count; i++) {
- unsigned int c = hexnum[i];
+ if (use_bootmem)
+ page = alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ page = (void *) get_zeroed_page(GFP_ATOMIC);
- switch (c) {
- case '0' ... '9': c -= '0'; break;
- case 'a' ... 'f': c -= 'a'-10; break;
- case 'A' ... 'F': c -= 'A'-10; break;
- default:
- goto out;
- }
- value = (value << 4) | c;
+ if (!page) {
+ prom_printf("SUN4V: Error, cannot allocate mondo queue.\n");
+ prom_halt();
}
-out:
- *ret = value;
- return 0;
-}
-static int irq_affinity_read_proc (char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- struct ino_bucket *bp = ivector_table + (long)data;
- struct irqaction *ap = bp->irq_info;
- cpumask_t mask = get_smpaff_in_irqaction(ap);
- int len;
-
- if (cpus_empty(mask))
- mask = cpu_online_map;
-
- len = cpumask_scnprintf(page, count, mask);
- if (count - len < 2)
- return -EINVAL;
- len += sprintf(page + len, "\n");
- return len;
+ *pa_ptr = __pa(page);
}
-static inline void set_intr_affinity(int irq, unsigned long hw_aff)
+static void __cpuinit alloc_one_kbuf(unsigned long *pa_ptr, int use_bootmem)
{
- struct ino_bucket *bp = ivector_table + irq;
+ void *page;
- /* Users specify affinity in terms of hw cpu ids.
- * As soon as we do this, handler_irq() might see and take action.
- */
- put_smpaff_in_irqaction((struct irqaction *)bp->irq_info, hw_aff);
+ if (use_bootmem)
+ page = alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ page = (void *) get_zeroed_page(GFP_ATOMIC);
- /* Migration is simply done by the next cpu to service this
- * interrupt.
- */
+ if (!page) {
+ prom_printf("SUN4V: Error, cannot allocate kbuf page.\n");
+ prom_halt();
+ }
+
+ *pa_ptr = __pa(page);
}
-static int irq_affinity_write_proc (struct file *file, const char __user *buffer,
- unsigned long count, void *data)
+static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb, int use_bootmem)
{
- int irq = (long) data, full_count = count, err;
- unsigned long new_value, i;
-
- err = parse_hex_value(buffer, count, &new_value);
-
- /*
- * Do not allow disabling IRQs completely - it's a too easy
- * way to make the system unusable accidentally :-) At least
- * one online CPU still has to be targeted.
- */
- for (i = 0; i < NR_CPUS; i++) {
- if ((new_value & (1UL << i)) != 0 &&
- !cpu_online(i))
- new_value &= ~(1UL << i);
- }
+#ifdef CONFIG_SMP
+ void *page;
- if (!new_value)
- return -EINVAL;
+ BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64));
- set_intr_affinity(irq, new_value);
+ if (use_bootmem)
+ page = alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ page = (void *) get_zeroed_page(GFP_ATOMIC);
- return full_count;
-}
+ 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
+}
-#define MAX_NAMELEN 10
-
-static void register_irq_proc (unsigned int irq)
+/* Allocate and register the mondo and error queues for this cpu. */
+void __cpuinit sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load)
{
- char name [MAX_NAMELEN];
-
- if (!root_irq_dir || irq_dir[irq])
- return;
+ struct trap_per_cpu *tb = &trap_block[cpu];
- memset(name, 0, MAX_NAMELEN);
- sprintf(name, "%x", irq);
+ if (alloc) {
+ alloc_one_mondo(&tb->cpu_mondo_pa, use_bootmem);
+ alloc_one_mondo(&tb->dev_mondo_pa, use_bootmem);
+ alloc_one_mondo(&tb->resum_mondo_pa, use_bootmem);
+ alloc_one_kbuf(&tb->resum_kernel_buf_pa, use_bootmem);
+ alloc_one_mondo(&tb->nonresum_mondo_pa, use_bootmem);
+ alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, use_bootmem);
- /* create /proc/irq/1234 */
- irq_dir[irq] = proc_mkdir(name, root_irq_dir);
+ init_cpu_send_mondo_info(tb, use_bootmem);
+ }
-#ifdef CONFIG_SMP
- /* XXX SMP affinity not supported on starfire yet. */
- if (this_is_starfire == 0) {
- struct proc_dir_entry *entry;
-
- /* create /proc/irq/1234/smp_affinity */
- entry = create_proc_entry("smp_affinity", 0600, irq_dir[irq]);
-
- if (entry) {
- entry->nlink = 1;
- entry->data = (void *)(long)irq;
- entry->read_proc = irq_affinity_read_proc;
- entry->write_proc = irq_affinity_write_proc;
+ if (load) {
+ if (cpu != hard_smp_processor_id()) {
+ prom_printf("SUN4V: init mondo on cpu %d not %d\n",
+ cpu, hard_smp_processor_id());
+ prom_halt();
}
+ sun4v_register_mondo_queues(cpu);
}
-#endif
}
-void init_irq_proc (void)
+static struct irqaction timer_irq_action = {
+ .name = "timer",
+};
+
+/* Only invoked on boot processor. */
+void __init init_IRQ(void)
{
- /* create /proc/irq */
- root_irq_dir = proc_mkdir("irq", 0);
-}
+ map_prom_timers();
+ kill_prom_timer();
+ memset(&ivector_table[0], 0, sizeof(ivector_table));
+
+ if (tlb_type == hypervisor)
+ sun4v_init_mondo_queues(1, hard_smp_processor_id(), 1, 1);
+
+ /* 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;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff