From 734085651c9b80aa3f9e6027b156102de214a0b2 Mon Sep 17 00:00:00 2001 From: Roman Zippel Date: Sun, 25 Jun 2006 05:47:03 -0700 Subject: [PATCH] [PATCH] m68k: convert atari irq code Signed-off-by: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m68k/atari/ataints.c | 278 ++++++-------------------------------- arch/m68k/atari/config.c | 11 -- 2 files changed, 42 insertions(+), 247 deletions(-) diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c index bb54741dd6cd..ece13cbf9950 100644 --- a/arch/m68k/atari/ataints.c +++ b/arch/m68k/atari/ataints.c @@ -104,6 +104,7 @@ * 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_INT_SOURCES]; */ 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 @@ void __init atari_init_IRQ(void) * 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 @@ void __init atari_init_IRQ(void) } -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(void) { 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 1012b08e5522..727289acad7e 100644 --- a/arch/m68k/atari/config.c +++ b/arch/m68k/atari/config.c @@ -57,12 +57,6 @@ static int atari_get_hardware_list(char *buffer); /* 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; -- 2.20.1