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)