[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/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
index 2854ac4..2e643d2 100644
--- a/arch/mips/sgi-ip27/ip27-irq.c
+++ b/arch/mips/sgi-ip27/ip27-irq.c
@@ -130,7 +130,7 @@
* Kanoj 05.13.00
*/
-void ip27_do_irq_mask0(struct pt_regs *regs)
+static void ip27_do_irq_mask0(struct pt_regs *regs)
{
int irq, swlevel;
hubreg_t pend0, mask0;
@@ -171,7 +171,7 @@
LOCAL_HUB_L(PI_INT_PEND0);
}
-void ip27_do_irq_mask1(struct pt_regs *regs)
+static void ip27_do_irq_mask1(struct pt_regs *regs)
{
int irq, swlevel;
hubreg_t pend1, mask1;
@@ -196,12 +196,12 @@
LOCAL_HUB_L(PI_INT_PEND1);
}
-void ip27_prof_timer(struct pt_regs *regs)
+static void ip27_prof_timer(struct pt_regs *regs)
{
panic("CPU %d got a profiling interrupt", smp_processor_id());
}
-void ip27_hub_error(struct pt_regs *regs)
+static void ip27_hub_error(struct pt_regs *regs)
{
panic("CPU %d got a hub error interrupt", smp_processor_id());
}
@@ -421,9 +421,26 @@
return irq;
}
+extern void ip27_rt_timer_interrupt(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned long pending = read_c0_cause() & read_c0_status();
+
+ if (pending & CAUSEF_IP4)
+ ip27_rt_timer_interrupt(regs);
+ else if (pending & CAUSEF_IP2) /* PI_INT_PEND_0 or CC_PEND_{A|B} */
+ ip27_do_irq_mask0(regs);
+ else if (pending & CAUSEF_IP3) /* PI_INT_PEND_1 */
+ ip27_do_irq_mask1(regs);
+ else if (pending & CAUSEF_IP5)
+ ip27_prof_timer(regs);
+ else if (pending & CAUSEF_IP6)
+ ip27_hub_error(regs);
+}
+
void __init arch_init_irq(void)
{
- set_except_vector(0, ip27_irq);
}
void install_ipi(void)