[MIPS] Rewrite all the assembler interrupt handlers to C.

[linux-2.6.git] / arch / mips / sni / irq.c

diff --git a/arch/mips/sni/irq.c b/arch/mips/sni/irq.c
index 141a310d74d80da02d6e470d7d3f0bc1c4237a63..7365b4853ddb212a0d6073d49d60460838819f1f 100644 (file)
--- a/arch/mips/sni/irq.c
+++ b/arch/mips/sni/irq.c
@@ -19,8 +19,6 @@
 
 DEFINE_SPINLOCK(pciasic_lock);
 
-extern asmlinkage void sni_rm200_pci_handle_int(void);
-
 static void enable_pciasic_irq(unsigned int irq)
 {
        unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2);
@@ -58,34 +56,33 @@ static void end_pciasic_irq(unsigned int irq)
 }
 
 static struct hw_interrupt_type pciasic_irq_type = {
-       "ASIC-PCI",
-       startup_pciasic_irq,
-       shutdown_pciasic_irq,
-       enable_pciasic_irq,
-       disable_pciasic_irq,
-       mask_and_ack_pciasic_irq,
-       end_pciasic_irq,
-       NULL
+       .typename = "ASIC-PCI",
+       .startup = startup_pciasic_irq,
+       .shutdown = shutdown_pciasic_irq,
+       .enable = enable_pciasic_irq,
+       .disable = disable_pciasic_irq,
+       .ack = mask_and_ack_pciasic_irq,
+       .end = end_pciasic_irq,
 };
 
 /*
  * hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug
  * button interrupts.  Later ...
  */
-void pciasic_hwint0(struct pt_regs *regs)
+static void pciasic_hwint0(struct pt_regs *regs)
 {
        panic("Received int0 but no handler yet ...");
 }
 
 /* This interrupt was used for the com1 console on the first prototypes.  */
-void pciasic_hwint2(struct pt_regs *regs)
+static void pciasic_hwint2(struct pt_regs *regs)
 {
        /* I think this shouldn't happen on production machines.  */
        panic("hwint2 and no handler yet");
 }
 
 /* hwint5 is the r4k count / compare interrupt  */
-void pciasic_hwint5(struct pt_regs *regs)
+static void pciasic_hwint5(struct pt_regs *regs)
 {
        panic("hwint5 and no handler yet");
 }
@@ -106,7 +103,7 @@ static unsigned int ls1bit8(unsigned int x)
  *
  * The EISA_INT bit in CSITPEND is high active, all others are low active.
  */
-void pciasic_hwint1(struct pt_regs *regs)
+static void pciasic_hwint1(struct pt_regs *regs)
 {
        u8 pend = *(volatile char *)PCIMT_CSITPEND;
        unsigned long flags;
@@ -136,7 +133,7 @@ void pciasic_hwint1(struct pt_regs *regs)
 /*
  * hwint 3 should deal with the PCI A - D interrupts,
  */
-void pciasic_hwint3(struct pt_regs *regs)
+static void pciasic_hwint3(struct pt_regs *regs)
 {
        u8 pend = *(volatile char *)PCIMT_CSITPEND;
        int irq;
@@ -151,13 +148,34 @@ void pciasic_hwint3(struct pt_regs *regs)
 /*
  * hwint 4 is used for only the onboard PCnet 32.
  */
-void pciasic_hwint4(struct pt_regs *regs)
+static void pciasic_hwint4(struct pt_regs *regs)
 {
        clear_c0_status(IE_IRQ4);
        do_IRQ(PCIMT_IRQ_ETHERNET, regs);
        set_c0_status(IE_IRQ4);
 }
 
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+       unsigned int pending = read_c0_status() & read_c0_cause();
+       static unsigned char led_cache;
+
+       *(volatile unsigned char *) PCIMT_CSLED = ++led_cache;
+
+       if (pending & 0x0800)
+               pciasic_hwint1(regs);
+       else if (pending & 0x4000)
+               pciasic_hwint4(regs);
+       else if (pending & 0x2000)
+               pciasic_hwint3(regs);
+       else if (pending & 0x1000)
+               pciasic_hwint2(regs);
+       else if (pending & 0x8000)
+               pciasic_hwint5(regs);
+       else if (pending & 0x0400)
+               pciasic_hwint0(regs);
+}
+
 void __init init_pciasic(void)
 {
        unsigned long flags;
@@ -177,8 +195,6 @@ void __init arch_init_irq(void)
 {
        int i;
 
-       set_except_vector(0, sni_rm200_pci_handle_int);
-
        init_i8259_irqs();                      /* Integrated i8259  */
        init_pciasic();