[PATCH 16/21] convert atari irq code

zippel
2006-06-23T18:42:52Z

[-- Attachment #1: 0022-M68K-convert-atari-irq-code.txt --]
[-- Type: text/plain, Size: 11097 bytes --]

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>

---

arch/m68k/atari/ataints.c | 278 +++++++--------------------------------------
arch/m68k/atari/config.c | 11 --
2 files changed, 42 insertions(+), 247 deletions(-)

db0859143263b908e466609fc42856e5f522cae9
diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index bb54741..ece13cb 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -104,6 +104,7 @@ #include <asm/entry.h>
* the sr copy in the frame.
*/

+#if 0

#define NUM_INT_SOURCES (8 + NUM_ATARI_SOURCES)

@@ -133,13 +134,6 @@ static struct irqhandler irq_handler[NUM
*/
static struct irqparam irq_param[NUM_INT_SOURCES];

-/*
- * Bitmap for free interrupt vector numbers
- * (new vectors starting from 0x70 can be allocated by
- * atari_register_vme_int())
- */
-static int free_vme_vec_bitmap;
-
/* check for valid int number (complex, sigh...) */
#define IS_VALID_INTNO(n) \
((n) > 0 && \
@@ -301,6 +295,14 @@ __asm__ (__ALIGN_STR "\n"
);
for (;;);
}
+#endif
+
+/*
+ * Bitmap for free interrupt vector numbers
+ * (new vectors starting from 0x70 can be allocated by
+ * atari_register_vme_int())
+ */
+static int free_vme_vec_bitmap;

/* GK:
* HBL IRQ handler for Falcon. Nobody needs it :-)
@@ -313,13 +315,34 @@ __ALIGN_STR "\n\t"
"orw #0x200,%sp@\n\t" /* set saved ipl to 2 */
"rte");

-/* Defined in entry.S; only increments 'num_spurious' */
-asmlinkage void bad_inthandler(void);
-
-extern void atari_microwire_cmd( int cmd );
+extern void atari_microwire_cmd(int cmd);

extern int atari_SCC_reset_done;

+static int atari_startup_irq(unsigned int irq)
+{
+ m68k_irq_startup(irq);
+ atari_turnon_irq(irq);
+ atari_enable_irq(irq);
+ return 0;
+}
+
+static void atari_shutdown_irq(unsigned int irq)
+{
+ atari_disable_irq(irq);
+ atari_turnoff_irq(irq);
+ m68k_irq_shutdown(irq);
+}
+
+static struct irq_controller atari_irq_controller = {
+ .name = "atari",
+ .lock = SPIN_LOCK_UNLOCKED,
+ .startup = atari_startup_irq,
+ .shutdown = atari_shutdown_irq,
+ .enable = atari_enable_irq,
+ .disable = atari_disable_irq,
+};
+
/*
* void atari_init_IRQ (void)
*
@@ -333,12 +356,8 @@ extern int atari_SCC_reset_done;

void __init atari_init_IRQ(void)
{
- int i;
-
- /* initialize the vector table */
- for (i = 0; i < NUM_INT_SOURCES; ++i) {
- vectors[IRQ_SOURCE_TO_VECTOR(i)] = bad_inthandler;
- }
+ m68k_setup_user_interrupt(VEC_USER, 192, NULL);
+ m68k_setup_irq_controller(&atari_irq_controller, 1, NUM_ATARI_SOURCES - 1);

/* Initialize the MFP(s) */

@@ -378,8 +397,7 @@ #endif
* enabled in VME mask
*/
tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
- }
- else {
+ } else {
/* If no SCU and no Hades, the HSYNC interrupt needs to be
* disabled this way. (Else _inthandler in kernel/sys_call.S
* gets overruns)
@@ -404,184 +422,6 @@ #endif
}

-static irqreturn_t atari_call_irq_list( int irq, void *dev_id, struct pt_regs *fp )
-{
- irq_node_t *node;
-
- for (node = (irq_node_t *)dev_id; node; node = node->next)
- node->handler(irq, node->dev_id, fp);
- return IRQ_HANDLED;
-}
-
-
-/*
- * atari_request_irq : add an interrupt service routine for a particular
- * machine specific interrupt source.
- * If the addition was successful, it returns 0.
- */
-
-int atari_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long flags, const char *devname, void *dev_id)
-{
- int vector;
- unsigned long oflags = flags;
-
- /*
- * The following is a hack to make some PCI card drivers work,
- * which set the SA_SHIRQ flag.
- */
-
- flags &= ~SA_SHIRQ;
-
- if (flags == SA_INTERRUPT) {
- printk ("%s: SA_INTERRUPT changed to IRQ_TYPE_SLOW for %s\n",
- __FUNCTION__, devname);
- flags = IRQ_TYPE_SLOW;
- }
- if (flags < IRQ_TYPE_SLOW || flags > IRQ_TYPE_PRIO) {
- printk ("%s: Bad irq type 0x%lx <0x%lx> requested from %s\n",
- __FUNCTION__, flags, oflags, devname);
- return -EINVAL;
- }
- if (!IS_VALID_INTNO(irq)) {
- printk ("%s: Unknown irq %d requested from %s\n",
- __FUNCTION__, irq, devname);
- return -ENXIO;
- }
- vector = IRQ_SOURCE_TO_VECTOR(irq);
-
- /*
- * Check type/source combination: slow ints are (currently)
- * only possible for MFP-interrupts.
- */
- if (flags == IRQ_TYPE_SLOW &&
- (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE)) {
- printk ("%s: Slow irq requested for non-MFP source %d from %s\n",
- __FUNCTION__, irq, devname);
- return -EINVAL;
- }
-
- if (vectors[vector] == bad_inthandler) {
- /* int has no handler yet */
- irq_handler[irq].handler = handler;
- irq_handler[irq].dev_id = dev_id;
- irq_param[irq].flags = flags;
- irq_param[irq].devname = devname;
- vectors[vector] =
- (flags == IRQ_TYPE_SLOW) ? slow_handlers[irq-STMFP_SOURCE_BASE] :
- (flags == IRQ_TYPE_FAST) ? atari_fast_irq_handler :
- atari_prio_irq_handler;
- /* If MFP int, also enable and umask it */
- atari_turnon_irq(irq);
- atari_enable_irq(irq);
-
- return 0;
- }
- else if (irq_param[irq].flags == flags) {
- /* old handler is of same type -> handlers can be chained */
- irq_node_t *node;
- unsigned long flags;
-
- local_irq_save(flags);
-
- if (irq_handler[irq].handler != atari_call_irq_list) {
- /* Only one handler yet, make a node for this first one */
- if (!(node = new_irq_node()))
- return -ENOMEM;
- node->handler = irq_handler[irq].handler;
- node->dev_id = irq_handler[irq].dev_id;
- node->devname = irq_param[irq].devname;
- node->next = NULL;
-
- irq_handler[irq].handler = atari_call_irq_list;
- irq_handler[irq].dev_id = node;
- irq_param[irq].devname = "chained";
- }
-
- if (!(node = new_irq_node()))
- return -ENOMEM;
- node->handler = handler;
- node->dev_id = dev_id;
- node->devname = devname;
- /* new handlers are put in front of the queue */
- node->next = irq_handler[irq].dev_id;
- irq_handler[irq].dev_id = node;
-
- local_irq_restore(flags);
- return 0;
- } else {
- printk ("%s: Irq %d allocated by other type int (call from %s)\n",
- __FUNCTION__, irq, devname);
- return -EBUSY;
- }
-}
-
-void atari_free_irq(unsigned int irq, void *dev_id)
-{
- unsigned long flags;
- int vector;
- irq_node_t **list, *node;
-
- if (!IS_VALID_INTNO(irq)) {
- printk("%s: Unknown irq %d\n", __FUNCTION__, irq);
- return;
- }
-
- vector = IRQ_SOURCE_TO_VECTOR(irq);
- if (vectors[vector] == bad_inthandler)
- goto not_found;
-
- local_irq_save(flags);
-
- if (irq_handler[irq].handler != atari_call_irq_list) {
- /* It's the only handler for the interrupt */
- if (irq_handler[irq].dev_id != dev_id) {
- local_irq_restore(flags);
- goto not_found;
- }
- irq_handler[irq].handler = NULL;
- irq_handler[irq].dev_id = NULL;
- irq_param[irq].devname = NULL;
- vectors[vector] = bad_inthandler;
- /* If MFP int, also disable it */
- atari_disable_irq(irq);
- atari_turnoff_irq(irq);
-
- local_irq_restore(flags);
- return;
- }
-
- /* The interrupt is chained, find the irq on the list */
- for(list = (irq_node_t **)&irq_handler[irq].dev_id; *list; list = &(*list)->next) {
- if ((*list)->dev_id == dev_id) break;
- }
- if (!*list) {
- local_irq_restore(flags);
- goto not_found;
- }
-
- (*list)->handler = NULL; /* Mark it as free for reallocation */
- *list = (*list)->next;
-
- /* If there's now only one handler, unchain the interrupt, i.e. plug in
- * the handler directly again and omit atari_call_irq_list */
- node = (irq_node_t *)irq_handler[irq].dev_id;
- if (node && !node->next) {
- irq_handler[irq].handler = node->handler;
- irq_handler[irq].dev_id = node->dev_id;
- irq_param[irq].devname = node->devname;
- node->handler = NULL; /* Mark it as free for reallocation */
- }
-
- local_irq_restore(flags);
- return;
-
-not_found:
- printk("%s: tried to remove invalid irq\n", __FUNCTION__);
- return;
-}
-
-
/*
* atari_register_vme_int() returns the number of a free interrupt vector for
* hardware with a programmable int vector (probably a VME board).
@@ -591,58 +431,24 @@ unsigned long atari_register_vme_int(voi
{
int i;

- for(i = 0; i < 32; i++)
- if((free_vme_vec_bitmap & (1 << i)) == 0)
+ for (i = 0; i < 32; i++)
+ if ((free_vme_vec_bitmap & (1 << i)) == 0)
break;

- if(i == 16)
+ if (i == 16)
return 0;

free_vme_vec_bitmap |= 1 << i;
- return (VME_SOURCE_BASE + i);
+ return VME_SOURCE_BASE + i;
}

void atari_unregister_vme_int(unsigned long irq)
{
- if(irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
+ if (irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
irq -= VME_SOURCE_BASE;
free_vme_vec_bitmap &= ~(1 << irq);
}
}

-int show_atari_interrupts(struct seq_file *p, void *v)
-{
- int i;
-
- for (i = 0; i < NUM_INT_SOURCES; ++i) {
- if (vectors[IRQ_SOURCE_TO_VECTOR(i)] == bad_inthandler)
- continue;
- if (i < STMFP_SOURCE_BASE)
- seq_printf(p, "auto %2d: %10u ",
- i, kstat_cpu(0).irqs[i]);
- else
- seq_printf(p, "vec $%02x: %10u ",
- IRQ_SOURCE_TO_VECTOR(i),
- kstat_cpu(0).irqs[i]);
-
- if (irq_handler[i].handler != atari_call_irq_list) {
- seq_printf(p, "%s\n", irq_param[i].devname);
- }
- else {
- irq_node_t *n;
- for( n = (irq_node_t *)irq_handler[i].dev_id; n; n = n->next ) {
- seq_printf(p, "%s\n", n->devname);
- if (n->next)
- seq_puts(p, " " );
- }
- }
- }
- if (num_spurious)
- seq_printf(p, "spurio.: %10u\n", num_spurious);
-
- return 0;
-}
-
-
diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
index 1012b08..727289a 100644
--- a/arch/m68k/atari/config.c
+++ b/arch/m68k/atari/config.c
@@ -57,12 +57,6 @@ static int atari_get_hardware_list(char

/* atari specific irq functions */
extern void atari_init_IRQ (void);
-extern int atari_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long flags, const char *devname, void *dev_id);
-extern void atari_free_irq (unsigned int irq, void *dev_id);
-extern void atari_enable_irq (unsigned int);
-extern void atari_disable_irq (unsigned int);
-extern int show_atari_interrupts (struct seq_file *, void *);
extern void atari_mksound( unsigned int count, unsigned int ticks );
#ifdef CONFIG_HEARTBEAT
static void atari_heartbeat( int on );
@@ -232,13 +226,8 @@ void __init config_atari(void)

mach_sched_init = atari_sched_init;
mach_init_IRQ = atari_init_IRQ;
- mach_request_irq = atari_request_irq;
- mach_free_irq = atari_free_irq;
- enable_irq = atari_enable_irq;
- disable_irq = atari_disable_irq;
mach_get_model = atari_get_model;
mach_get_hardware_list = atari_get_hardware_list;
- mach_get_irq_list = show_atari_interrupts;
mach_gettimeoffset = atari_gettimeoffset;
mach_reset = atari_reset;
mach_max_dma_address = 0xffffff;
--
1.3.3

--