[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/Makefile b/arch/mips/sgi-ip27/Makefile
index 4ba3407..686ba14 100644
--- a/arch/mips/sgi-ip27/Makefile
+++ b/arch/mips/sgi-ip27/Makefile
@@ -2,7 +2,7 @@
# Makefile for the IP27 specific kernel interface routines under Linux.
#
-obj-y := ip27-berr.o ip27-console.o ip27-irq.o ip27-init.o ip27-irq-glue.o \
+obj-y := ip27-berr.o ip27-console.o ip27-irq.o ip27-init.o \
ip27-klconfig.o ip27-klnuma.o ip27-memory.o ip27-nmi.o ip27-reset.o \
ip27-timer.o ip27-hubio.o ip27-xtalk.o
diff --git a/arch/mips/sgi-ip27/TODO b/arch/mips/sgi-ip27/TODO
index 3210613..19f1512 100644
--- a/arch/mips/sgi-ip27/TODO
+++ b/arch/mips/sgi-ip27/TODO
@@ -9,10 +9,6 @@
in irix?
6. Investigate why things do not work without the setup_test() call
being invoked on all nodes in ip27-memory.c.
-7. Too many CLIs in the locore handlers :
-For the low level handlers set up by set_except_vector(),
-__tlb_refill_debug_tramp, __xtlb_refill_debug_tramp and cacheerror,
-investigate whether the code should do CLI, STI or KMODE.
8. Too many do_page_faults invoked - investigate.
9. start_thread must turn off UX64 ... and define tlb_refill_debug.
10. Need a bad pmd table, bad pte table. __bad_pmd_table/__bad_pagetable
diff --git a/arch/mips/sgi-ip27/ip27-irq-glue.S b/arch/mips/sgi-ip27/ip27-irq-glue.S
deleted file mode 100644
index c304df7..0000000
--- a/arch/mips/sgi-ip27/ip27-irq-glue.S
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1999 Ralf Baechle
- * Copyright (C) 1999 Silicon Graphics, Inc.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .text
- .align 5
-NESTED(ip27_irq, PT_SIZE, sp)
- SAVE_ALL
- CLI
-
- mfc0 s0, CP0_CAUSE
- mfc0 t0, CP0_STATUS
- and s0, t0
- move a0, sp
- PTR_LA ra, ret_from_irq
-
- /* First check for RT interrupt. */
- andi t0, s0, CAUSEF_IP4
- bnez t0, ip4
- andi t0, s0, CAUSEF_IP2
- bnez t0, ip2
- andi t0, s0, CAUSEF_IP3
- bnez t0, ip3
- andi t0, s0, CAUSEF_IP5
- bnez t0, ip5
- andi t0, s0, CAUSEF_IP6
- bnez t0, ip6
- j ra
-
-ip2: j ip27_do_irq_mask0 # PI_INT_PEND_0 or CC_PEND_{A|B}
-ip3: j ip27_do_irq_mask1 # PI_INT_PEND_1
-ip4: j ip27_rt_timer_interrupt
-ip5: j ip27_prof_timer
-ip6: j ip27_hub_error
-
- END(ip27_irq)
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)