[MIPS] Rewrite all the assembler interrupt handlers to C.
Saves like 1,600 lines of code, is way easier to debug, compilers
frequently do a better job than the cut and paste type of handlers many
boards had. And finally having all the stuff done in a single place
also means alot of bug potencial for the MT ASE is gone.
The only surviving handler in assembler is the DECstation one; I hope
Maciej will rewrite it.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/ddb5xxx/ddb5477/irq.c b/arch/mips/ddb5xxx/ddb5477/irq.c
index 9ffe1a9..de433cf 100644
--- a/arch/mips/ddb5xxx/ddb5477/irq.c
+++ b/arch/mips/ddb5xxx/ddb5477/irq.c
@@ -75,7 +75,6 @@
extern void vrc5477_irq_init(u32 base);
extern void mips_cpu_irq_init(u32 base);
-extern asmlinkage void ddb5477_handle_int(void);
extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
@@ -135,9 +134,6 @@
/* setup cascade interrupts */
setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade);
setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade);
-
- /* hook up the first-level interrupt handler */
- set_except_vector(0, ddb5477_handle_int);
}
u8 i8259_interrupt_ack(void)
@@ -159,7 +155,7 @@
* the first level int-handler will jump here if it is a vrc5477 irq
*/
#define NUM_5477_IRQS 32
-asmlinkage void
+static void
vrc5477_irq_dispatch(struct pt_regs *regs)
{
u32 intStatus;
@@ -197,3 +193,21 @@
}
}
}
+
+#define VR5477INTS (STATUSF_IP2|STATUSF_IP3|STATUSF_IP4|STATUSF_IP5|STATUSF_IP6)
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP7)
+ do_IRQ(CPU_IRQ_BASE + 7, regs);
+ else if (pending & VR5477INTS)
+ vrc5477_irq_dispatch(regs);
+ else if (pending & STATUSF_IP0)
+ do_IRQ(CPU_IRQ_BASE, regs);
+ else if (pending & STATUSF_IP1)
+ do_IRQ(CPU_IRQ_BASE + 1, regs);
+ else
+ spurious_interrupt(regs);
+}