#include <asm/traps.h>
#include <asm/page.h>
#include <asm/machdep.h>
+#include <asm/cacheflush.h>
#ifdef CONFIG_Q40
#include <asm/q40ints.h>
#endif
+extern u32 auto_irqhandler_fixup[];
+extern u32 user_irqhandler_fixup[];
+extern u16 user_irqvec_fixup[];
+
/* table for system interrupt handlers */
-static irq_handler_t irq_list[SYS_IRQS];
-
-static const char *default_names[SYS_IRQS] = {
- [0] = "spurious int",
- [1] = "int1 handler",
- [2] = "int2 handler",
- [3] = "int3 handler",
- [4] = "int4 handler",
- [5] = "int5 handler",
- [6] = "int6 handler",
- [7] = "int7 handler"
+static struct irq_node *irq_list[NR_IRQS];
+static struct irq_controller *irq_controller[NR_IRQS];
+static int irq_depth[NR_IRQS];
+
+static int m68k_first_user_vec;
+
+static struct irq_controller auto_irq_controller = {
+ .name = "auto",
+ .lock = SPIN_LOCK_UNLOCKED,
+ .startup = m68k_irq_startup,
+ .shutdown = m68k_irq_shutdown,
};
-/* The number of spurious interrupts */
-volatile unsigned int num_spurious;
+static struct irq_controller user_irq_controller = {
+ .name = "user",
+ .lock = SPIN_LOCK_UNLOCKED,
+ .startup = m68k_irq_startup,
+ .shutdown = m68k_irq_shutdown,
+};
#define NUM_IRQ_NODES 100
static irq_node_t nodes[NUM_IRQ_NODES];
-static void dummy_enable_irq(unsigned int irq);
-static void dummy_disable_irq(unsigned int irq);
-static int dummy_request_irq(unsigned int irq,
- irqreturn_t (*handler) (int, void *, struct pt_regs *),
- unsigned long flags, const char *devname, void *dev_id);
-static void dummy_free_irq(unsigned int irq, void *dev_id);
-
-void (*enable_irq) (unsigned int) = dummy_enable_irq;
-void (*disable_irq) (unsigned int) = dummy_disable_irq;
-
-int (*mach_request_irq) (unsigned int, irqreturn_t (*)(int, void *, struct pt_regs *),
- unsigned long, const char *, void *) = dummy_request_irq;
-void (*mach_free_irq) (unsigned int, void *) = dummy_free_irq;
-
-void init_irq_proc(void);
-
/*
* void init_IRQ(void)
*
hardirq_mask_is_broken();
}
- for (i = 0; i < SYS_IRQS; i++) {
- if (mach_default_handler)
- irq_list[i].handler = (*mach_default_handler)[i];
- irq_list[i].flags = 0;
- irq_list[i].dev_id = NULL;
- irq_list[i].devname = default_names[i];
- }
+ for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)
+ irq_controller[i] = &auto_irq_controller;
+
+ mach_init_IRQ();
+}
+
+/**
+ * m68k_setup_auto_interrupt
+ * @handler: called from auto vector interrupts
+ *
+ * setup the handler to be called from auto vector interrupts instead of the
+ * standard m68k_handle_int(), it will be called with irq numbers in the range
+ * from IRQ_AUTO_1 - IRQ_AUTO_7.
+ */
+void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *))
+{
+ if (handler)
+ *auto_irqhandler_fixup = (u32)handler;
+ flush_icache();
+}
- for (i = 0; i < NUM_IRQ_NODES; i++)
- nodes[i].handler = NULL;
+/**
+ * m68k_setup_user_interrupt
+ * @vec: first user vector interrupt to handle
+ * @cnt: number of active user vector interrupts
+ * @handler: called from user vector interrupts
+ *
+ * setup user vector interrupts, this includes activating the specified range
+ * of interrupts, only then these interrupts can be requested (note: this is
+ * different from auto vector interrupts). An optional handler can be installed
+ * to be called instead of the default m68k_handle_int(), it will be called
+ * with irq numbers starting from IRQ_USER.
+ */
+void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
+ void (*handler)(unsigned int, struct pt_regs *))
+{
+ int i;
+
+ m68k_first_user_vec = vec;
+ for (i = 0; i < cnt; i++)
+ irq_controller[IRQ_USER + i] = &user_irq_controller;
+ *user_irqvec_fixup = vec - IRQ_USER;
+ if (handler)
+ *user_irqhandler_fixup = (u32)handler;
+ flush_icache();
+}
+
+/**
+ * m68k_setup_irq_controller
+ * @contr: irq controller which controls specified irq
+ * @irq: first irq to be managed by the controller
+ *
+ * Change the controller for the specified range of irq, which will be used to
+ * manage these irq. auto/user irq already have a default controller, which can
+ * be changed as well, but the controller probably should use m68k_irq_startup/
+ * m68k_irq_shutdown.
+ */
+void m68k_setup_irq_controller(struct irq_controller *contr, unsigned int irq,
+ unsigned int cnt)
+{
+ int i;
- mach_init_IRQ ();
+ for (i = 0; i < cnt; i++)
+ irq_controller[irq + i] = contr;
}
irq_node_t *new_irq_node(void)
irq_node_t *node;
short i;
- for (node = nodes, i = NUM_IRQ_NODES-1; i >= 0; node++, i--)
- if (!node->handler)
+ for (node = nodes, i = NUM_IRQ_NODES-1; i >= 0; node++, i--) {
+ if (!node->handler) {
+ memset(node, 0, sizeof(*node));
return node;
+ }
+ }
printk ("new_irq_node: out of nodes\n");
return NULL;
}
-/*
- * We will keep these functions until I have convinced Linus to move
- * the declaration of them from include/linux/sched.h to
- * include/asm/irq.h.
- */
+int setup_irq(unsigned int irq, struct irq_node *node)
+{
+ struct irq_controller *contr;
+ struct irq_node **prev;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS || !(contr = irq_controller[irq])) {
+ printk("%s: Incorrect IRQ %d from %s\n",
+ __FUNCTION__, irq, node->devname);
+ return -ENXIO;
+ }
+
+ spin_lock_irqsave(&contr->lock, flags);
+
+ prev = irq_list + irq;
+ if (*prev) {
+ /* Can't share interrupts unless both agree to */
+ if (!((*prev)->flags & node->flags & SA_SHIRQ)) {
+ spin_unlock_irqrestore(&contr->lock, flags);
+ return -EBUSY;
+ }
+ while (*prev)
+ prev = &(*prev)->next;
+ }
+
+ if (!irq_list[irq]) {
+ if (contr->startup)
+ contr->startup(irq);
+ else
+ contr->enable(irq);
+ }
+ node->next = NULL;
+ *prev = node;
+
+ spin_unlock_irqrestore(&contr->lock, flags);
+
+ return 0;
+}
+
int request_irq(unsigned int irq,
irqreturn_t (*handler) (int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id)
{
- return mach_request_irq(irq, handler, flags, devname, dev_id);
+ struct irq_node *node;
+ int res;
+
+ node = new_irq_node();
+ if (!node)
+ return -ENOMEM;
+
+ node->handler = handler;
+ node->flags = flags;
+ node->dev_id = dev_id;
+ node->devname = devname;
+
+ res = setup_irq(irq, node);
+ if (res)
+ node->handler = NULL;
+
+ return res;
}
EXPORT_SYMBOL(request_irq);
void free_irq(unsigned int irq, void *dev_id)
{
- mach_free_irq(irq, dev_id);
+ struct irq_controller *contr;
+ struct irq_node **p, *node;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS || !(contr = irq_controller[irq])) {
+ printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ return;
+ }
+
+ spin_lock_irqsave(&contr->lock, flags);
+
+ p = irq_list + irq;
+ while ((node = *p)) {
+ if (node->dev_id == dev_id)
+ break;
+ p = &node->next;
+ }
+
+ if (node) {
+ *p = node->next;
+ node->handler = NULL;
+ } else
+ printk("%s: Removing probably wrong IRQ %d\n",
+ __FUNCTION__, irq);
+
+ if (!irq_list[irq]) {
+ if (contr->shutdown)
+ contr->shutdown(irq);
+ else
+ contr->disable(irq);
+ }
+
+ spin_unlock_irqrestore(&contr->lock, flags);
}
EXPORT_SYMBOL(free_irq);
-int cpu_request_irq(unsigned int irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long flags, const char *devname, void *dev_id)
+void enable_irq(unsigned int irq)
{
- if (irq < IRQ1 || irq > IRQ7) {
- printk("%s: Incorrect IRQ %d from %s\n",
- __FUNCTION__, irq, devname);
- return -ENXIO;
- }
+ struct irq_controller *contr;
+ unsigned long flags;
-#if 0
- if (!(irq_list[irq].flags & IRQ_FLG_STD)) {
- if (irq_list[irq].flags & IRQ_FLG_LOCK) {
- printk("%s: IRQ %d from %s is not replaceable\n",
- __FUNCTION__, irq, irq_list[irq].devname);
- return -EBUSY;
- }
- if (!(flags & IRQ_FLG_REPLACE)) {
- printk("%s: %s can't replace IRQ %d from %s\n",
- __FUNCTION__, devname, irq, irq_list[irq].devname);
- return -EBUSY;
- }
+ if (irq >= NR_IRQS || !(contr = irq_controller[irq])) {
+ printk("%s: Incorrect IRQ %d\n",
+ __FUNCTION__, irq);
+ return;
}
-#endif
- irq_list[irq].handler = handler;
- irq_list[irq].flags = flags;
- irq_list[irq].dev_id = dev_id;
- irq_list[irq].devname = devname;
- return 0;
+ spin_lock_irqsave(&contr->lock, flags);
+ if (irq_depth[irq]) {
+ if (!--irq_depth[irq]) {
+ if (contr->enable)
+ contr->enable(irq);
+ }
+ } else
+ WARN_ON(1);
+ spin_unlock_irqrestore(&contr->lock, flags);
}
-void cpu_free_irq(unsigned int irq, void *dev_id)
+EXPORT_SYMBOL(enable_irq);
+
+void disable_irq(unsigned int irq)
{
- if (irq < IRQ1 || irq > IRQ7) {
- printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ struct irq_controller *contr;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS || !(contr = irq_controller[irq])) {
+ printk("%s: Incorrect IRQ %d\n",
+ __FUNCTION__, irq);
return;
}
- if (irq_list[irq].dev_id != dev_id)
- printk("%s: Removing probably wrong IRQ %d from %s\n",
- __FUNCTION__, irq, irq_list[irq].devname);
+ spin_lock_irqsave(&contr->lock, flags);
+ if (!irq_depth[irq]++) {
+ if (contr->disable)
+ contr->disable(irq);
+ }
+ spin_unlock_irqrestore(&contr->lock, flags);
+}
- irq_list[irq].handler = (*mach_default_handler)[irq];
- irq_list[irq].flags = 0;
- irq_list[irq].dev_id = NULL;
- irq_list[irq].devname = default_names[irq];
+EXPORT_SYMBOL(disable_irq);
+
+int m68k_irq_startup(unsigned int irq)
+{
+ if (irq <= IRQ_AUTO_7)
+ vectors[VEC_SPUR + irq] = auto_inthandler;
+ else
+ vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;
+ return 0;
}
+void m68k_irq_shutdown(unsigned int irq)
+{
+ if (irq <= IRQ_AUTO_7)
+ vectors[VEC_SPUR + irq] = bad_inthandler;
+ else
+ vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;
+}
+
+
/*
* Do we need these probe functions on the m68k?
*
EXPORT_SYMBOL(probe_irq_off);
-static void dummy_enable_irq(unsigned int irq)
-{
- printk("calling uninitialized enable_irq()\n");
-}
-
-static void dummy_disable_irq(unsigned int irq)
+unsigned int irq_canonicalize(unsigned int irq)
{
- printk("calling uninitialized disable_irq()\n");
+#ifdef CONFIG_Q40
+ if (MACH_IS_Q40 && irq == 11)
+ irq = 10;
+#endif
+ return irq;
}
-static int dummy_request_irq(unsigned int irq,
- irqreturn_t (*handler) (int, void *, struct pt_regs *),
- unsigned long flags, const char *devname, void *dev_id)
-{
- printk("calling uninitialized request_irq()\n");
- return 0;
-}
+EXPORT_SYMBOL(irq_canonicalize);
-static void dummy_free_irq(unsigned int irq, void *dev_id)
+asmlinkage void m68k_handle_int(unsigned int irq, struct pt_regs *regs)
{
- printk("calling uninitialized disable_irq()\n");
+ struct irq_node *node;
+
+ kstat_cpu(0).irqs[irq]++;
+ node = irq_list[irq];
+ do {
+ node->handler(irq, node->dev_id, regs);
+ node = node->next;
+ } while (node);
}
-asmlinkage void process_int(unsigned long vec, struct pt_regs *fp)
+asmlinkage void handle_badint(struct pt_regs *regs)
{
- if (vec >= VEC_INT1 && vec <= VEC_INT7 && !MACH_IS_BVME6000) {
- vec -= VEC_SPUR;
- kstat_cpu(0).irqs[vec]++;
- irq_list[vec].handler(vec, irq_list[vec].dev_id, fp);
- } else {
- if (mach_process_int)
- mach_process_int(vec, fp);
- else
- panic("Can't process interrupt vector %ld\n", vec);
- return;
- }
+ kstat_cpu(0).irqs[0]++;
+ printk("unexpected interrupt from %u\n", regs->vector);
}
int show_interrupts(struct seq_file *p, void *v)
{
+ struct irq_controller *contr;
+ struct irq_node *node;
int i = *(loff_t *) v;
/* autovector interrupts */
- if (i < SYS_IRQS) {
- if (mach_default_handler) {
- seq_printf(p, "auto %2d: %10u ", i,
- i ? kstat_cpu(0).irqs[i] : num_spurious);
- seq_puts(p, " ");
- seq_printf(p, "%s\n", irq_list[i].devname);
- }
- } else if (i == SYS_IRQS)
- mach_get_irq_list(p, v);
+ if (irq_list[i]) {
+ contr = irq_controller[i];
+ node = irq_list[i];
+ seq_printf(p, "%-8s %3u: %10u %s", contr->name, i, kstat_cpu(0).irqs[i], node->devname);
+ while ((node = node->next))
+ seq_printf(p, ", %s", node->devname);
+ seq_puts(p, "\n");
+ }
return 0;
}
git.openpandora.org / pandora-kernel.git / blobdiff