diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68k/kernel/entry.S | 11 | ||||
| -rw-r--r-- | arch/m68k/kernel/ints.c | 240 | ||||
| -rw-r--r-- | arch/m68k/kernel/m68k_ksyms.c | 2 | ||||
| -rw-r--r-- | arch/m68k/kernel/setup.c | 3 | ||||
| -rw-r--r-- | arch/m68k/kernel/traps.c | 7 |
5 files changed, 163 insertions, 100 deletions
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 1fb88f3311de..48cccc556e13 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -48,6 +48,8 @@ .globl sys_call_table .globl sys_fork, sys_clone, sys_vfork .globl ret_from_interrupt, bad_interrupt +.globl auto_irqhandler_fixup +.globl user_irqvec_fixup, user_irqhandler_fixup .text ENTRY(buserr) @@ -212,6 +214,7 @@ ENTRY(auto_inthandler) jbra 3f 1: #endif +auto_irqhandler_fixup = . + 2 jsr m68k_handle_int | process the IRQ 3: addql #8,%sp | pop parameters off stack @@ -234,17 +237,19 @@ ret_from_last_interrupt: /* Handler for user defined interrupt vectors */ -ENTRY(mach_inthandler) +ENTRY(user_inthandler) SAVE_ALL_INT GET_CURRENT(%d0) addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) | put exception # in d0 bfextu %sp@(PT_VECTOR){#4,#10},%d0 +user_irqvec_fixup = . + 2 + subw #VEC_USER,%d0 movel %sp,%sp@- movel %d0,%sp@- | put vector # on stack - movel mach_process_int,%a0 - jsr %a0@ | process the IRQ +user_irqhandler_fixup = . + 2 + jsr m68k_handle_int | process the IRQ addql #8,%sp | pop parameters off stack subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) diff --git a/arch/m68k/kernel/ints.c b/arch/m68k/kernel/ints.c index c7f6ee67fd5a..5a8344b93547 100644 --- a/arch/m68k/kernel/ints.c +++ b/arch/m68k/kernel/ints.c @@ -39,14 +39,22 @@ #include <asm/traps.h> #include <asm/page.h> #include <asm/machdep.h> +#include <asm/cacheflush.h> #ifdef CONFIG_Q40 #include <asm/q40ints.h> #endif +extern u32 auto_irqhandler_fixup[]; +extern u32 user_irqhandler_fixup[]; +extern u16 user_irqvec_fixup[]; + /* table for system interrupt handlers */ -static struct irq_node *irq_list[SYS_IRQS]; -static struct irq_controller *irq_controller[SYS_IRQS]; +static struct irq_node *irq_list[NR_IRQS]; +static struct irq_controller *irq_controller[NR_IRQS]; +static int irq_depth[NR_IRQS]; + +static int m68k_first_user_vec; static struct irq_controller auto_irq_controller = { .name = "auto", @@ -55,39 +63,16 @@ static struct irq_controller auto_irq_controller = { .shutdown = m68k_irq_shutdown, }; -static const char *default_names[SYS_IRQS] = { - [0] = "spurious int", - [1] = "int1 handler", - [2] = "int2 handler", - [3] = "int3 handler", - [4] = "int4 handler", - [5] = "int5 handler", - [6] = "int6 handler", - [7] = "int7 handler" +static struct irq_controller user_irq_controller = { + .name = "user", + .lock = SPIN_LOCK_UNLOCKED, + .startup = m68k_irq_startup, + .shutdown = m68k_irq_shutdown, }; -/* The number of spurious interrupts */ -volatile unsigned int num_spurious; - #define NUM_IRQ_NODES 100 static irq_node_t nodes[NUM_IRQ_NODES]; -static void dummy_enable_irq(unsigned int irq); -static void dummy_disable_irq(unsigned int irq); -static int dummy_request_irq(unsigned int irq, - irqreturn_t (*handler) (int, void *, struct pt_regs *), - unsigned long flags, const char *devname, void *dev_id); -static void dummy_free_irq(unsigned int irq, void *dev_id); - -void (*enable_irq) (unsigned int) = dummy_enable_irq; -void (*disable_irq) (unsigned int) = dummy_disable_irq; - -int (*mach_request_irq) (unsigned int, irqreturn_t (*)(int, void *, struct pt_regs *), - unsigned long, const char *, void *) = dummy_request_irq; -void (*mach_free_irq) (unsigned int, void *) = dummy_free_irq; - -void init_irq_proc(void); - /* * void init_IRQ(void) * @@ -109,14 +94,70 @@ void __init init_IRQ(void) hardirq_mask_is_broken(); } - for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++) { + for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++) irq_controller[i] = &auto_irq_controller; - if (mach_default_handler && (*mach_default_handler)[i]) - cpu_request_irq(i, (*mach_default_handler)[i], - 0, default_names[i], NULL); - } - mach_init_IRQ (); + mach_init_IRQ(); +} + +/** + * m68k_setup_auto_interrupt + * @handler: called from auto vector interrupts + * + * setup the handler to be called from auto vector interrupts instead of the + * standard m68k_handle_int(), it will be called with irq numbers in the range + * from IRQ_AUTO_1 - IRQ_AUTO_7. + */ +void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)) +{ + if (handler) + *auto_irqhandler_fixup = (u32)handler; + flush_icache(); +} + +/** + * m68k_setup_user_interrupt + * @vec: first user vector interrupt to handle + * @cnt: number of active user vector interrupts + * @handler: called from user vector interrupts + * + * setup user vector interrupts, this includes activating the specified range + * of interrupts, only then these interrupts can be requested (note: this is + * different from auto vector interrupts). An optional handler can be installed + * to be called instead of the default m68k_handle_int(), it will be called + * with irq numbers starting from IRQ_USER. + */ +void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt, + void (*handler)(unsigned int, struct pt_regs *)) +{ + int i; + + m68k_first_user_vec = vec; + for (i = 0; i < cnt; i++) + irq_controller[IRQ_USER + i] = &user_irq_controller; + *user_irqvec_fixup = vec - IRQ_USER; + if (handler) + *user_irqhandler_fixup = (u32)handler; + flush_icache(); +} + +/** + * m68k_setup_irq_controller + * @contr: irq controller which controls specified irq + * @irq: first irq to be managed by the controller + * + * Change the controller for the specified range of irq, which will be used to + * manage these irq. auto/user irq already have a default controller, which can + * be changed as well, but the controller probably should use m68k_irq_startup/ + * m68k_irq_shutdown. + */ +void m68k_setup_irq_controller(struct irq_controller *contr, unsigned int irq, + unsigned int cnt) +{ + int i; + + for (i = 0; i < cnt; i++) + irq_controller[irq + i] = contr; } irq_node_t *new_irq_node(void) @@ -135,34 +176,13 @@ irq_node_t *new_irq_node(void) return NULL; } -/* - * We will keep these functions until I have convinced Linus to move - * the declaration of them from include/linux/sched.h to - * include/asm/irq.h. - */ -int request_irq(unsigned int irq, - irqreturn_t (*handler) (int, void *, struct pt_regs *), - unsigned long flags, const char *devname, void *dev_id) -{ - return mach_request_irq(irq, handler, flags, devname, dev_id); -} - -EXPORT_SYMBOL(request_irq); - -void free_irq(unsigned int irq, void *dev_id) -{ - mach_free_irq(irq, dev_id); -} - -EXPORT_SYMBOL(free_irq); - int setup_irq(unsigned int irq, struct irq_node *node) { struct irq_controller *contr; struct irq_node **prev; unsigned long flags; - if (irq >= SYS_IRQS || !(contr = irq_controller[irq])) { + if (irq >= NR_IRQS || !(contr = irq_controller[irq])) { printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, node->devname); return -ENXIO; @@ -195,9 +215,9 @@ int setup_irq(unsigned int irq, struct irq_node *node) return 0; } -int cpu_request_irq(unsigned int irq, - irqreturn_t (*handler)(int, void *, struct pt_regs *), - unsigned long flags, const char *devname, void *dev_id) +int request_irq(unsigned int irq, + irqreturn_t (*handler) (int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id) { struct irq_node *node; int res; @@ -218,13 +238,15 @@ int cpu_request_irq(unsigned int irq, return res; } -void cpu_free_irq(unsigned int irq, void *dev_id) +EXPORT_SYMBOL(request_irq); + +void free_irq(unsigned int irq, void *dev_id) { struct irq_controller *contr; struct irq_node **p, *node; unsigned long flags; - if (irq >= SYS_IRQS || !(contr = irq_controller[irq])) { + if (irq >= NR_IRQS || !(contr = irq_controller[irq])) { printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq); return; } @@ -245,16 +267,69 @@ void cpu_free_irq(unsigned int irq, void *dev_id) printk("%s: Removing probably wrong IRQ %d\n", __FUNCTION__, irq); - if (!irq_list[irq]) - contr->shutdown(irq); + if (!irq_list[irq]) { + if (contr->shutdown) + contr->shutdown(irq); + else + contr->disable(irq); + } + + spin_unlock_irqrestore(&contr->lock, flags); +} + +EXPORT_SYMBOL(free_irq); + +void enable_irq(unsigned int irq) +{ + struct irq_controller *contr; + unsigned long flags; + + if (irq >= NR_IRQS || !(contr = irq_controller[irq])) { + printk("%s: Incorrect IRQ %d\n", + __FUNCTION__, irq); + return; + } + + spin_lock_irqsave(&contr->lock, flags); + if (irq_depth[irq]) { + if (!--irq_depth[irq]) { + if (contr->enable) + contr->enable(irq); + } + } else + WARN_ON(1); + spin_unlock_irqrestore(&contr->lock, flags); +} + +EXPORT_SYMBOL(enable_irq); +void disable_irq(unsigned int irq) +{ + struct irq_controller *contr; + unsigned long flags; + + if (irq >= NR_IRQS || !(contr = irq_controller[irq])) { + printk("%s: Incorrect IRQ %d\n", + __FUNCTION__, irq); + return; + } + + spin_lock_irqsave(&contr->lock, flags); + if (!irq_depth[irq]++) { + if (contr->disable) + contr->disable(irq); + } spin_unlock_irqrestore(&contr->lock, flags); } +EXPORT_SYMBOL(disable_irq); + int m68k_irq_startup(unsigned int irq) { if (irq <= IRQ_AUTO_7) vectors[VEC_SPUR + irq] = auto_inthandler; + else + vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler; return 0; } @@ -262,6 +337,8 @@ void m68k_irq_shutdown(unsigned int irq) { if (irq <= IRQ_AUTO_7) vectors[VEC_SPUR + irq] = bad_inthandler; + else + vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler; } @@ -292,28 +369,16 @@ int probe_irq_off (unsigned long irqs) EXPORT_SYMBOL(probe_irq_off); -static void dummy_enable_irq(unsigned int irq) +unsigned int irq_canonicalize(unsigned int irq) { - printk("calling uninitialized enable_irq()\n"); -} - -static void dummy_disable_irq(unsigned int irq) -{ - printk("calling uninitialized disable_irq()\n"); -} - -static int dummy_request_irq(unsigned int irq, - irqreturn_t (*handler) (int, void *, struct pt_regs *), - unsigned long flags, const char *devname, void *dev_id) -{ - printk("calling uninitialized request_irq()\n"); - return 0; +#ifdef CONFIG_Q40 + if (MACH_IS_Q40 && irq == 11) + irq = 10; +#endif + return irq; } -static void dummy_free_irq(unsigned int irq, void *dev_id) -{ - printk("calling uninitialized disable_irq()\n"); -} +EXPORT_SYMBOL(irq_canonicalize); asmlinkage void m68k_handle_int(unsigned int irq, struct pt_regs *regs) { @@ -340,15 +405,14 @@ int show_interrupts(struct seq_file *p, void *v) int i = *(loff_t *) v; /* autovector interrupts */ - if (i < SYS_IRQS && irq_list[i]) { + if (irq_list[i]) { contr = irq_controller[i]; node = irq_list[i]; - seq_printf(p, "%s %u: %10u %s", contr->name, i, kstat_cpu(0).irqs[i], node->devname); + seq_printf(p, "%-8s %3u: %10u %s", contr->name, i, kstat_cpu(0).irqs[i], node->devname); while ((node = node->next)) seq_printf(p, ", %s", node->devname); seq_puts(p, "\n"); - } else if (i == SYS_IRQS) - mach_get_irq_list(p, v); + } return 0; } diff --git a/arch/m68k/kernel/m68k_ksyms.c b/arch/m68k/kernel/m68k_ksyms.c index 5b7952ea2bae..1f5e1b5aeda4 100644 --- a/arch/m68k/kernel/m68k_ksyms.c +++ b/arch/m68k/kernel/m68k_ksyms.c @@ -57,8 +57,6 @@ EXPORT_SYMBOL(dump_thread); EXPORT_SYMBOL(strnlen); EXPORT_SYMBOL(strrchr); EXPORT_SYMBOL(strstr); -EXPORT_SYMBOL(enable_irq); -EXPORT_SYMBOL(disable_irq); EXPORT_SYMBOL(kernel_thread); #ifdef CONFIG_VME EXPORT_SYMBOL(vme_brdtype); diff --git a/arch/m68k/kernel/setup.c b/arch/m68k/kernel/setup.c index 750d5b3c971f..214a95f9f3ac 100644 --- a/arch/m68k/kernel/setup.c +++ b/arch/m68k/kernel/setup.c @@ -68,11 +68,8 @@ char m68k_debug_device[6] = ""; void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL; /* machine dependent irq functions */ void (*mach_init_IRQ) (void) __initdata = NULL; -irqreturn_t (*(*mach_default_handler)[]) (int, void *, struct pt_regs *); void (*mach_get_model) (char *model); int (*mach_get_hardware_list) (char *buffer); -int (*mach_get_irq_list) (struct seq_file *, void *); -irqreturn_t (*mach_process_int) (int, struct pt_regs *); /* machine dependent timer functions */ unsigned long (*mach_gettimeoffset) (void); int (*mach_hwclk) (int, struct rtc_time*); diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c index b19b951fd3e7..e86de7b061cd 100644 --- a/arch/m68k/kernel/traps.c +++ b/arch/m68k/kernel/traps.c @@ -87,16 +87,15 @@ void __init trap_init (void) { int i; - vectors[VEC_SPUR] = bad_inthandler; - for (i = VEC_INT1; i <= VEC_INT7; i++) - vectors[i] = auto_inthandler; + for (i = VEC_SPUR; i <= VEC_INT7; i++) + vectors[i] = bad_inthandler; for (i = 0; i < VEC_USER; i++) if (!vectors[i]) vectors[i] = trap; for (i = VEC_USER; i < 256; i++) - vectors[i] = mach_inthandler; + vectors[i] = bad_inthandler; #ifdef CONFIG_M68KFPU_EMU if (FPU_IS_EMU) |