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authorRalf Baechle <ralf@linux-mips.org>2006-04-03 17:56:36 +0100
committerRalf Baechle <ralf@linux-mips.org>2006-04-19 04:14:21 +0200
commite4ac58afdfac792c0583af30dbd9eae53e24c78b (patch)
tree7517bef2c515fc630e4d3d238867b91cde96f558 /arch/mips/philips/pnx8550/common
parentd35d473c25d43d7db3e5e18b66d558d2a631cca8 (diff)
[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>
Diffstat (limited to 'arch/mips/philips/pnx8550/common')
-rw-r--r--arch/mips/philips/pnx8550/common/Makefile2
-rw-r--r--arch/mips/philips/pnx8550/common/int.c23
-rw-r--r--arch/mips/philips/pnx8550/common/mipsIRQ.S77
3 files changed, 17 insertions, 85 deletions
diff --git a/arch/mips/philips/pnx8550/common/Makefile b/arch/mips/philips/pnx8550/common/Makefile
index 6e38f3bc443..b7c638166e9 100644
--- a/arch/mips/philips/pnx8550/common/Makefile
+++ b/arch/mips/philips/pnx8550/common/Makefile
@@ -22,6 +22,6 @@
# under Linux.
#
-obj-y := setup.o prom.o mipsIRQ.o int.o reset.o time.o proc.o platform.o
+obj-y := setup.o prom.o int.o reset.o time.o proc.o platform.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_KGDB) += gdb_hook.o
diff --git a/arch/mips/philips/pnx8550/common/int.c b/arch/mips/philips/pnx8550/common/int.c
index c500e2d41f2..39ee6314f62 100644
--- a/arch/mips/philips/pnx8550/common/int.c
+++ b/arch/mips/philips/pnx8550/common/int.c
@@ -38,8 +38,6 @@
#include <int.h>
#include <uart.h>
-extern asmlinkage void cp0_irqdispatch(void);
-
static DEFINE_SPINLOCK(irq_lock);
/* default prio for interrupts */
@@ -55,7 +53,7 @@ static char gic_prio[PNX8550_INT_GIC_TOTINT] = {
1 // 70
};
-void hw0_irqdispatch(int irq, struct pt_regs *regs)
+static void hw0_irqdispatch(int irq, struct pt_regs *regs)
{
/* find out which interrupt */
irq = PNX8550_GIC_VECTOR_0 >> 3;
@@ -68,7 +66,7 @@ void hw0_irqdispatch(int irq, struct pt_regs *regs)
}
-void timer_irqdispatch(int irq, struct pt_regs *regs)
+static void timer_irqdispatch(int irq, struct pt_regs *regs)
{
irq = (0x01c0 & read_c0_config7()) >> 6;
@@ -88,6 +86,20 @@ void timer_irqdispatch(int irq, struct pt_regs *regs)
}
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause();
+
+ if (pending & STATUSF_IP2)
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP7) {
+ if (read_c0_config7() & 0x01c0)
+ timer_irqdispatch(7, regs);
+ }
+
+ spurious_interrupt(regs);
+}
+
static inline void modify_cp0_intmask(unsigned clr_mask, unsigned set_mask)
{
unsigned long status = read_c0_status();
@@ -223,9 +235,6 @@ void __init arch_init_irq(void)
int i;
int configPR;
- /* init of cp0 interrupts */
- set_except_vector(0, cp0_irqdispatch);
-
for (i = 0; i < PNX8550_INT_CP0_TOTINT; i++) {
irq_desc[i].handler = &level_irq_type;
pnx8550_ack(i); /* mask the irq just in case */
diff --git a/arch/mips/philips/pnx8550/common/mipsIRQ.S b/arch/mips/philips/pnx8550/common/mipsIRQ.S
deleted file mode 100644
index e049a719f83..00000000000
--- a/arch/mips/philips/pnx8550/common/mipsIRQ.S
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Copyright (c) 2002 Philips, Inc. All rights.
- * Copyright (c) 2002 Red Hat, Inc. All rights.
- *
- * This software may be freely redistributed under the terms of the
- * GNU General Public License.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Based upon arch/mips/galileo-boards/ev64240/int-handler.S
- *
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * cp0_irqdispatch
- *
- * Code to handle in-core interrupt exception.
- */
-
- .align 5
- .set reorder
- .set noat
- NESTED(cp0_irqdispatch, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0,CP0_CAUSE
- mfc0 t2,CP0_STATUS
-
- and t0,t2
-
- andi t1,t0,STATUSF_IP2 /* int0 hardware line */
- bnez t1,ll_hw0_irq
- nop
-
- andi t1,t0,STATUSF_IP7 /* int5 hardware line */
- bnez t1,ll_timer_irq
- nop
-
- /* wrong alarm or masked ... */
-
- jal spurious_interrupt
- nop
- j ret_from_irq
- END(cp0_irqdispatch)
-
- .align 5
- .set reorder
-ll_hw0_irq:
- li a0,2
- move a1,sp
- jal hw0_irqdispatch
- nop
- j ret_from_irq
- nop
-
- .align 5
- .set reorder
-ll_timer_irq:
- mfc0 t3,CP0_CONFIG,7
- andi t4,t3,0x01c0
- beqz t4,ll_timer_out
- nop
- li a0,7
- move a1,sp
- jal timer_irqdispatch
- nop
-
-ll_timer_out: j ret_from_irq
- nop