* Copyright (c) 1999 D. Jeff Dionne <jeff@uclinux.org>
*/
-#include <linux/config.h>
-#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/kernel_stat.h>
-#include <linux/errno.h>
-
-#include <asm/system.h>
-#include <asm/irq.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <asm/traps.h>
-#include <asm/io.h>
#include <asm/machdep.h>
-#include <asm/setup.h>
#include <asm/m68360.h>
/* from quicc/commproc.c: */
asmlinkage void system_call(void);
asmlinkage void buserr(void);
asmlinkage void trap(void);
-asmlinkage irqreturn_t bad_interrupt(void);
-asmlinkage irqreturn_t inthandler(void);
+asmlinkage void bad_interrupt(void);
+asmlinkage void inthandler(void);
extern void *_ramvec[];
/* The number of spurious interrupts */
volatile unsigned int num_spurious;
-unsigned int local_irq_count[NR_CPUS];
-/* irq node variables for the 32 (potential) on chip sources */
-static irq_node_t int_irq_list[INTERNAL_IRQS];
+static void intc_irq_unmask(unsigned int irq)
+{
+ pquicc->intr_cimr |= (1 << irq);
+}
+
+static void intc_irq_mask(unsigned int irq)
+{
+ pquicc->intr_cimr &= ~(1 << irq);
+}
+
+static void intc_irq_ack(unsigned int irq)
+{
+ pquicc->intr_cisr = (1 << irq);
+}
-static short int_irq_ablecount[INTERNAL_IRQS];
+static struct irq_chip intc_irq_chip = {
+ .name = "M68K-INTC",
+ .mask = intc_irq_mask,
+ .unmask = intc_irq_unmask,
+ .ack = intc_irq_ack,
+};
/*
* This function should be called during kernel startup to initialize
- * IRQ handling routines.
+ * the vector table.
*/
-
void init_IRQ(void)
{
int i;
_ramvec[32] = system_call;
_ramvec[33] = trap;
-
cpm_interrupt_init();
/* set up CICR for vector base address and irq level */
_ramvec[vba+CPMVEC_PIO_PC7] = inthandler; /* pio - pc7 */
_ramvec[vba+CPMVEC_PIO_PC6] = inthandler; /* pio - pc6 */
_ramvec[vba+CPMVEC_TIMER3] = inthandler; /* timer 3 */
- _ramvec[vba+CPMVEC_RISCTIMER] = inthandler; /* reserved */
_ramvec[vba+CPMVEC_PIO_PC5] = inthandler; /* pio - pc5 */
_ramvec[vba+CPMVEC_PIO_PC4] = inthandler; /* pio - pc4 */
_ramvec[vba+CPMVEC_RESERVED2] = inthandler; /* reserved */
/* turn off all CPM interrupts */
pquicc->intr_cimr = 0x00000000;
- /* initialize handlers */
- for (i = 0; i < INTERNAL_IRQS; i++) {
- int_irq_list[i].handler = NULL;
- int_irq_list[i].flags = IRQ_FLG_STD;
- int_irq_list[i].dev_id = NULL;
- int_irq_list[i].devname = NULL;
- }
-}
-
-#if 0
-void M68360_insert_irq(irq_node_t **list, irq_node_t *node)
-{
- unsigned long flags;
- irq_node_t *cur;
-
- if (!node->dev_id)
- printk(KERN_INFO "%s: Warning: dev_id of %s is zero\n",
- __FUNCTION__, node->devname);
-
- local_irq_save(flags);
-
- cur = *list;
-
- while (cur) {
- list = &cur->next;
- cur = cur->next;
- }
-
- node->next = cur;
- *list = node;
-
- local_irq_restore(flags);
-}
-
-void M68360_delete_irq(irq_node_t **list, void *dev_id)
-{
- unsigned long flags;
- irq_node_t *node;
-
- local_irq_save(flags);
-
- for (node = *list; node; list = &node->next, node = *list) {
- if (node->dev_id == dev_id) {
- *list = node->next;
- /* Mark it as free. */
- node->handler = NULL;
- local_irq_restore(flags);
- return;
- }
- }
- local_irq_restore(flags);
- printk (KERN_INFO "%s: tried to remove invalid irq\n", __FUNCTION__);
-}
-#endif
-
-int request_irq(
- unsigned int irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long flags,
- const char *devname,
- void *dev_id)
-{
- int mask = (1<<irq);
-
- irq += (CPM_VECTOR_BASE<<4);
-
- if (irq >= INTERNAL_IRQS) {
- printk (KERN_ERR "%s: Unknown IRQ %d from %s\n", __FUNCTION__, irq, devname);
- return -ENXIO;
- }
-
- if (!(int_irq_list[irq].flags & IRQ_FLG_STD)) {
- if (int_irq_list[irq].flags & IRQ_FLG_LOCK) {
- printk(KERN_ERR "%s: IRQ %d from %s is not replaceable\n",
- __FUNCTION__, irq, int_irq_list[irq].devname);
- return -EBUSY;
- }
- if (flags & IRQ_FLG_REPLACE) {
- printk(KERN_ERR "%s: %s can't replace IRQ %d from %s\n",
- __FUNCTION__, devname, irq, int_irq_list[irq].devname);
- return -EBUSY;
- }
- }
- int_irq_list[irq].handler = handler;
- int_irq_list[irq].flags = flags;
- int_irq_list[irq].dev_id = dev_id;
- int_irq_list[irq].devname = devname;
-
- /* enable in the CIMR */
- if (!int_irq_ablecount[irq])
- pquicc->intr_cimr |= mask;
- /* *(volatile unsigned long *)0xfffff304 &= ~(1<<irq); */
-
- return 0;
-}
-
-EXPORT_SYMBOL(request_irq);
-
-void free_irq(unsigned int irq, void *dev_id)
-{
- if (irq >= INTERNAL_IRQS) {
- printk (KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
+ for (i = 0; (i < NR_IRQS); i++) {
+ irq_desc[i].status = IRQ_DISABLED;
+ irq_desc[i].action = NULL;
+ irq_desc[i].depth = 1;
+ irq_desc[i].chip = &intc_irq_chip;
}
-
- if (int_irq_list[irq].dev_id != dev_id)
- printk(KERN_INFO "%s: removing probably wrong IRQ %d from %s\n",
- __FUNCTION__, irq, int_irq_list[irq].devname);
- int_irq_list[irq].handler = NULL;
- int_irq_list[irq].flags = IRQ_FLG_STD;
- int_irq_list[irq].dev_id = NULL;
- int_irq_list[irq].devname = NULL;
-
- *(volatile unsigned long *)0xfffff304 |= 1<<irq;
}
-EXPORT_SYMBOL(free_irq);
-
-#if 0
-/*
- * Enable/disable a particular machine specific interrupt source.
- * Note that this may affect other interrupts in case of a shared interrupt.
- * This function should only be called for a _very_ short time to change some
- * internal data, that may not be changed by the interrupt at the same time.
- * int_(enable|disable)_irq calls may also be nested.
- */
-void M68360_enable_irq(unsigned int irq)
-{
- if (irq >= INTERNAL_IRQS) {
- printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (--int_irq_ablecount[irq])
- return;
-
- /* enable the interrupt */
- *(volatile unsigned long *)0xfffff304 &= ~(1<<irq);
-}
-
-void M68360_disable_irq(unsigned int irq)
-{
- if (irq >= INTERNAL_IRQS) {
- printk(KERN_ERR "%s: Unknown IRQ %d\n", __FUNCTION__, irq);
- return;
- }
-
- if (int_irq_ablecount[irq]++)
- return;
-
- /* disable the interrupt */
- *(volatile unsigned long *)0xfffff304 |= 1<<irq;
-}
-#endif
-
-int show_interrupts(struct seq_file *p, void *v)
-{
- int i = *(loff_t *) v;
-
- if (i < NR_IRQS) {
- if (int_irq_list[i].devname) {
- seq_printf(p, "%3d: %10u ", i, kstat_cpu(0).irqs[i]);
- if (int_irq_list[i].flags & IRQ_FLG_LOCK)
- seq_printf(p, "L ");
- else
- seq_printf(p, " ");
- seq_printf(p, "%s\n", int_irq_list[i].devname);
- }
- }
- if (i == NR_IRQS)
- seq_printf(p, " : %10u spurious\n", num_spurious);
-
- return 0;
-}
-
-/* The 68k family did not have a good way to determine the source
- * of interrupts until later in the family. The EC000 core does
- * not provide the vector number on the stack, we vector everything
- * into one vector and look in the blasted mask register...
- * This code is designed to be fast, almost constant time, not clean!
- */
-void process_int(int vec, struct pt_regs *fp)
-{
- int irq;
- int mask;
-
- /* unsigned long pend = *(volatile unsigned long *)0xfffff30c; */
-
- /* irq = vec + (CPM_VECTOR_BASE<<4); */
- irq = vec;
-
- /* unsigned long pend = *(volatile unsigned long *)pquicc->intr_cipr; */
-
- /* Bugger all that weirdness. For the moment, I seem to know where I came from;
- * vec is passed from a specific ISR, so I'll use it. */
-
- if (int_irq_list[irq].handler) {
- int_irq_list[irq].handler(irq , int_irq_list[irq].dev_id, fp);
- kstat_cpu(0).irqs[irq]++;
- pquicc->intr_cisr = (1 << vec); /* indicate that irq has been serviced */
- } else {
- printk(KERN_ERR "unregistered interrupt %d!\nTurning it off in the CIMR...\n", irq);
- /* *(volatile unsigned long *)0xfffff304 |= mask; */
- pquicc->intr_cimr &= ~(1 << vec);
- num_spurious += 1;
- }
- return(IRQ_HANDLED);
-}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff