1 files changed, 74 insertions, 4 deletions

diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c
index b309b1bcf2e8..becc9accd495 100644
--- a/arch/mips/jazz/irq.c
+++ b/arch/mips/jazz/irq.c
@@ -15,8 +15,6 @@
 #include <asm/io.h>
 #include <asm/jazz.h>
 
-extern asmlinkage void jazz_handle_int(void);
-
 static DEFINE_SPINLOCK(r4030_lock);
 
 static void enable_r4030_irq(unsigned int irq)
@@ -90,10 +88,82 @@ void __init init_r4030_ints(void)
  */
 void __init arch_init_irq(void)
 {
-        set_except_vector(0, jazz_handle_int);
-
         init_i8259_irqs();                      /* Integrated i8259  */
         init_r4030_ints();
 
         change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
 }
+
+static void loc_call(unsigned int irq, struct pt_regs *regs, unsigned int mask)
+{
+        r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+                          r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
+        do_IRQ(irq, regs);
+        r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+                          r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
+}
+
+static void ll_local_dev(struct pt_regs *regs)
+{
+        switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
+        case 0:
+                panic("Unimplemented loc_no_irq handler");
+                break;
+        case 4:
+                loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_PARALLEL);
+                break;
+        case 8:
+                loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_FLOPPY);
+                break;
+        case 12:
+                panic("Unimplemented loc_sound handler");
+                break;
+        case 16:
+                panic("Unimplemented loc_video handler");
+                break;
+        case 20:
+                loc_call(JAZZ_ETHERNET_IRQ, regs, JAZZ_IE_ETHERNET);
+                break;
+        case 24:
+                loc_call(JAZZ_SCSI_IRQ, regs, JAZZ_IE_SCSI);
+                break;
+        case 28:
+                loc_call(JAZZ_KEYBOARD_IRQ, regs, JAZZ_IE_KEYBOARD);
+                break;
+        case 32:
+                loc_call(JAZZ_MOUSE_IRQ, regs, JAZZ_IE_MOUSE);
+                break;
+        case 36:
+                loc_call(JAZZ_SERIAL1_IRQ, regs, JAZZ_IE_SERIAL1);
+                break;
+        case 40:
+                loc_call(JAZZ_SERIAL2_IRQ, regs, JAZZ_IE_SERIAL2);
+                break;
+        }
+}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+        unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+        if (pending & IE_IRQ5)
+                write_c0_compare(0);
+        else if (pending & IE_IRQ4) {
+                r4030_read_reg32(JAZZ_TIMER_REGISTER);
+                do_IRQ(JAZZ_TIMER_IRQ, regs);
+        } else if (pending & IE_IRQ3)
+                panic("Unimplemented ISA NMI handler");
+        else if (pending & IE_IRQ2)
+                do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK), regs);
+        else if (pending & IE_IRQ1) {
+                ll_local_dev(regs);
+        } else if (unlikely(pending & IE_IRQ0))
+                panic("Unimplemented local_dma handler");
+        else if (pending & IE_SW1) {
+                clear_c0_cause(IE_SW1);
+                panic("Unimplemented sw1 handler");
+        } else if (pending & IE_SW0) {
+                clear_c0_cause(IE_SW0);
+                panic("Unimplemented sw0 handler");
+        }
+}