Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 | /*
* ints.c -- 680x0 Linux general interrupt handling code
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*
* 07/03/96: Timer initialization, and thus mach_sched_init(),
* removed from request_irq() and moved to init_time().
* We should therefore consider renaming our add_isr() and
* remove_isr() to request_irq() and free_irq()
* respectively, so they are compliant with the other
* architectures. /Jes
*/
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/errno.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/page.h>
#include <asm/machdep.h>
/* list is accessed 0-6 for IRQs 1-7 */
static isr_node_t *isr_list[7];
/* The number of spurious interrupts */
volatile unsigned long num_spurious;
/*
unsigned long interrupt_stack[PAGE_SIZE/sizeof(long)];
*/
/*
* void init_IRQ(void)
*
* Parameters: None
*
* Returns: Nothing
*
* This function should be called during kernel startup to initialize
* the IRQ handling routines.
*/
void init_IRQ(void)
{
/* Setup interrupt stack pointer */
/*
asm ("movec %0,%/isp"
: : "r" (interrupt_stack + sizeof (interrupt_stack) / sizeof (long)));
*/
mach_init_INTS ();
}
void insert_isr (isr_node_t **listp, isr_node_t *node)
{
unsigned long spl;
isr_node_t *cur;
save_flags(spl);
cli();
cur = *listp;
while (cur && cur->pri <= node->pri)
{
listp = &cur->next;
cur = cur->next;
}
node->next = cur;
*listp = node;
restore_flags(spl);
}
void delete_isr (isr_node_t **listp, isrfunc isr, void *data)
{
unsigned long flags;
isr_node_t *np;
save_flags(flags);
cli();
for (np = *listp; np; listp = &np->next, np = *listp) {
if (np->isr == isr && np->data == data) {
*listp = np->next;
/* Mark it as free. */
np->isr = NULL;
restore_flags(flags);
return;
}
}
restore_flags(flags);
printk ("delete_isr: isr %p not found on list!\n", isr);
}
#define NUM_ISR_NODES 100
static isr_node_t nodes[NUM_ISR_NODES];
isr_node_t *new_isr_node(void)
{
isr_node_t *np;
for (np = nodes; np < &nodes[NUM_ISR_NODES]; np++)
if (np->isr == NULL)
return np;
printk ("new_isr_node: out of nodes");
return NULL;
}
int add_isr (unsigned long source, isrfunc isr, int pri, void *data,
char *name)
{
isr_node_t *p;
if (source & IRQ_MACHSPEC)
{
return mach_add_isr (source, isr, pri, data, name);
}
if (source < IRQ1 || source > IRQ7)
panic ("add_isr: Incorrect IRQ source %ld from %s\n", source, name);
p = new_isr_node();
if (p == NULL)
return 0;
p->isr = isr;
p->pri = pri;
p->data = data;
p->name = name;
p->next = NULL;
insert_isr (&isr_list[source-1], p);
return 1;
}
int remove_isr (unsigned long source, isrfunc isr, void *data)
{
if (source & IRQ_MACHSPEC)
return mach_remove_isr (source, isr, data);
if (source < IRQ1 || source > IRQ7) {
printk ("remove_isr: Incorrect IRQ source %ld\n", source);
return 0;
}
delete_isr (&isr_list[source - 1], isr, data);
return 1;
}
void call_isr_list(int irq, isr_node_t *p, struct pt_regs *fp)
{
while (p) {
p->isr (irq, fp, p->data);
p = p->next;
}
}
asmlinkage void process_int(int vec, struct pt_regs *regs)
{
int level;
if (vec >= VECOFF(VEC_INT1) && vec <= VECOFF(VEC_INT7))
level = (vec - VECOFF(VEC_SPUR)) >> 2;
else {
if (mach_process_int)
mach_process_int(vec, regs);
else
panic("Can't process interrupt vector 0x%03x\n", vec);
return;
}
kstat.interrupts[level]++;
call_isr_list (level, isr_list[level-1], regs);
}
int request_irq(unsigned int irq,
void (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char * devname, void *dev_id)
{
return -EINVAL;
}
void free_irq(unsigned int irq, void *dev_id)
{
}
/*
* Do we need these probe functions on the m68k?
*/
unsigned long probe_irq_on (void)
{
return 0;
}
int probe_irq_off (unsigned long irqs)
{
return 0;
}
void enable_irq(unsigned int irq_nr)
{
if ((irq_nr & IRQ_MACHSPEC) && mach_enable_irq)
mach_enable_irq(irq_nr);
}
void disable_irq(unsigned int irq_nr)
{
if ((irq_nr & IRQ_MACHSPEC) && mach_disable_irq)
mach_disable_irq(irq_nr);
}
int get_irq_list(char *buf)
{
int i, len = 0;
isr_node_t *p;
/* autovector interrupts */
for (i = IRQ1; i <= IRQ7; ++i) {
if (!isr_list[i-1])
continue;
len += sprintf(buf+len, "auto %2d: %8d ", i, kstat.interrupts[i]);
for (p = isr_list[i-1]; p; p = p->next) {
len += sprintf(buf+len, "%s\n", p->name);
if (p->next)
len += sprintf(buf+len, " ");
}
}
len = mach_get_irq_list(buf, len);
return len;
}
|