/* $Id: irq.c,v 1.114 2001/12/11 04:55:51 davem Exp $
* arch/sparc/kernel/irq.c: Interrupt request handling routines. On the
- * Sparc the IRQ's are basically 'cast in stone'
+ * Sparc the IRQs are basically 'cast in stone'
* and you are supposed to probe the prom's device
* node trees to find out who's got which IRQ.
*
#include <linux/random.h>
#include <linux/init.h>
#include <linux/smp.h>
-#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <linux/threads.h>
#include <linux/spinlock.h>
#include <asm/cacheflush.h>
#include <asm/irq_regs.h>
+#include "irq.h"
+
#ifdef CONFIG_SMP
#define SMP_NOP2 "nop; nop;\n\t"
#define SMP_NOP3 "nop; nop; nop;\n\t"
kfree(action);
if (!sparc_irq[cpu_irq].action)
- disable_irq(irq);
+ __disable_irq(irq);
out_unlock:
spin_unlock_irqrestore(&irq_action_lock, flags);
irq_enter();
disable_pil_irq(irq);
#ifdef CONFIG_SMP
- /* Only rotate on lower priority IRQ's (scsi, ethernet, etc.). */
+ /* Only rotate on lower priority IRQs (scsi, ethernet, etc.). */
if((sparc_cpu_model==sun4m) && (irq < 10))
smp4m_irq_rotate(cpu);
#endif
set_irq_regs(old_regs);
}
-#ifdef CONFIG_BLK_DEV_FD
-extern void floppy_interrupt(int irq, void *dev_id);
-
-void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct pt_regs *old_regs;
- int cpu = smp_processor_id();
+#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
- old_regs = set_irq_regs(regs);
- disable_pil_irq(irq);
- irq_enter();
- kstat_cpu(cpu).irqs[irq]++;
- floppy_interrupt(irq, dev_id);
- irq_exit();
- enable_pil_irq(irq);
- set_irq_regs(old_regs);
- // XXX Eek, it's totally changed with preempt_count() and such
- // if (softirq_pending(cpu))
- // do_softirq();
-}
-#endif
-
-/* Fast IRQ's on the Sparc can only have one routine attached to them,
+/* Fast IRQs on the Sparc can only have one routine attached to them,
* thus no sharing possible.
*/
-int request_fast_irq(unsigned int irq,
- irq_handler_t handler,
- unsigned long irqflags, const char *devname)
+static int request_fast_irq(unsigned int irq,
+ void (*handler)(void),
+ unsigned long irqflags, const char *devname)
{
struct irqaction *action;
unsigned long flags;
}
if (action == NULL)
- action = (struct irqaction *)kmalloc(sizeof(struct irqaction),
+ action = kmalloc(sizeof(struct irqaction),
GFP_ATOMIC);
if (!action) {
*/
flush_cache_all();
- action->handler = handler;
action->flags = irqflags;
cpus_clear(action->mask);
action->name = devname;
sparc_irq[cpu_irq].action = action;
- enable_irq(irq);
+ __enable_irq(irq);
ret = 0;
out_unlock:
return ret;
}
+/* These variables are used to access state from the assembler
+ * interrupt handler, floppy_hardint, so we cannot put these in
+ * the floppy driver image because that would not work in the
+ * modular case.
+ */
+volatile unsigned char *fdc_status;
+EXPORT_SYMBOL(fdc_status);
+
+char *pdma_vaddr;
+EXPORT_SYMBOL(pdma_vaddr);
+
+unsigned long pdma_size;
+EXPORT_SYMBOL(pdma_size);
+
+volatile int doing_pdma;
+EXPORT_SYMBOL(doing_pdma);
+
+char *pdma_base;
+EXPORT_SYMBOL(pdma_base);
+
+unsigned long pdma_areasize;
+EXPORT_SYMBOL(pdma_areasize);
+
+extern void floppy_hardint(void);
+
+static irqreturn_t (*floppy_irq_handler)(int irq, void *dev_id);
+
+void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct pt_regs *old_regs;
+ int cpu = smp_processor_id();
+
+ old_regs = set_irq_regs(regs);
+ disable_pil_irq(irq);
+ irq_enter();
+ kstat_cpu(cpu).irqs[irq]++;
+ floppy_irq_handler(irq, dev_id);
+ irq_exit();
+ enable_pil_irq(irq);
+ set_irq_regs(old_regs);
+ // XXX Eek, it's totally changed with preempt_count() and such
+ // if (softirq_pending(cpu))
+ // do_softirq();
+}
+
+int sparc_floppy_request_irq(int irq, unsigned long flags,
+ irqreturn_t (*irq_handler)(int irq, void *))
+{
+ floppy_irq_handler = irq_handler;
+ return request_fast_irq(irq, floppy_hardint, flags, "floppy");
+}
+EXPORT_SYMBOL(sparc_floppy_request_irq);
+
+#endif
+
int request_irq(unsigned int irq,
irq_handler_t handler,
unsigned long irqflags, const char * devname, void *dev_id)
}
if (action == NULL)
- action = (struct irqaction *)kmalloc(sizeof(struct irqaction),
+ action = kmalloc(sizeof(struct irqaction),
GFP_ATOMIC);
if (!action) {
*actionp = action;
- enable_irq(irq);
+ __enable_irq(irq);
ret = 0;
out_unlock:
EXPORT_SYMBOL(request_irq);
+void disable_irq_nosync(unsigned int irq)
+{
+ return __disable_irq(irq);
+}
+EXPORT_SYMBOL(disable_irq_nosync);
+
+void disable_irq(unsigned int irq)
+{
+ return __disable_irq(irq);
+}
+EXPORT_SYMBOL(disable_irq);
+
+void enable_irq(unsigned int irq)
+{
+ return __enable_irq(irq);
+}
+
+EXPORT_SYMBOL(enable_irq);
+
/* We really don't need these at all on the Sparc. We only have
* stubs here because they are exported to modules.
*/
break;
default:
- prom_printf("Cannot initialize IRQ's on this Sun machine...");
+ prom_printf("Cannot initialize IRQs on this Sun machine...");
break;
}
btfixup();
projects / linux-2.6-omap-h63xx.git / blobdiff