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authorRalf Baechle <ralf@linux-mips.org>2006-04-03 12:56:36 -0400
committerRalf Baechle <ralf@linux-mips.org>2006-04-18 22:14:21 -0400
commite4ac58afdfac792c0583af30dbd9eae53e24c78b (patch)
tree7517bef2c515fc630e4d3d238867b91cde96f558 /arch/mips/gt64120
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/gt64120')
-rw-r--r--arch/mips/gt64120/ev64120/Makefile2
-rw-r--r--arch/mips/gt64120/ev64120/int-handler.S114
-rw-r--r--arch/mips/gt64120/ev64120/irq.c27
-rw-r--r--arch/mips/gt64120/momenco_ocelot/Makefile2
-rw-r--r--arch/mips/gt64120/momenco_ocelot/int-handler.S131
-rw-r--r--arch/mips/gt64120/momenco_ocelot/irq.c36
6 files changed, 49 insertions, 263 deletions
diff --git a/arch/mips/gt64120/ev64120/Makefile b/arch/mips/gt64120/ev64120/Makefile
index ebe91c57e173..b2c53a8f8718 100644
--- a/arch/mips/gt64120/ev64120/Makefile
+++ b/arch/mips/gt64120/ev64120/Makefile
@@ -6,6 +6,6 @@
6# Makefile for the Galileo EV64120 board. 6# Makefile for the Galileo EV64120 board.
7# 7#
8 8
9obj-y += int-handler.o irq.o promcon.o reset.o serialGT.o setup.o 9obj-y += irq.o promcon.o reset.o serialGT.o setup.o
10 10
11EXTRA_AFLAGS := $(CFLAGS) 11EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/gt64120/ev64120/int-handler.S b/arch/mips/gt64120/ev64120/int-handler.S
deleted file mode 100644
index 9dda5b449522..000000000000
--- a/arch/mips/gt64120/ev64120/int-handler.S
+++ /dev/null
@@ -1,114 +0,0 @@
1/*
2 * int-handler.S
3 *
4 * Based on the cobalt handler.
5 */
6#include <asm/asm.h>
7#include <asm/mipsregs.h>
8#include <asm/addrspace.h>
9#include <asm/regdef.h>
10#include <asm/stackframe.h>
11
12/*
13 * galileo_handle_int -
14 * We check for the timer first, then check PCI ints A and D.
15 * Then check for serial IRQ and fall through.
16 */
17 .align 5
18 .set reorder
19 .set noat
20 NESTED(galileo_handle_int, PT_SIZE, sp)
21 SAVE_ALL
22 CLI
23 .set at
24 mfc0 t0,CP0_CAUSE
25 mfc0 t2,CP0_STATUS
26
27 and t0,t2
28
29 andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */
30 bnez t1,ll_gt64120_irq
31 andi t1,t0,STATUSF_IP2 /* int0 hardware line */
32 bnez t1,ll_pci_intA
33 andi t1,t0,STATUSF_IP5 /* int3 hardware line */
34 bnez t1,ll_pci_intD
35 andi t1,t0,STATUSF_IP6 /* int4 hardware line */
36 bnez t1,ll_serial_irq
37 andi t1,t0,STATUSF_IP7 /* compare int */
38 bnez t1,ll_compare_irq
39 nop
40
41 /* wrong alarm or masked ... */
42 jal spurious_interrupt
43 nop
44 j ret_from_irq
45 END(galileo_handle_int)
46
47
48 .align 5
49 .set reorder
50ll_gt64120_irq:
51 li a0,4
52 move a1,sp
53 jal do_IRQ
54 nop
55 j ret_from_irq
56 nop
57
58 .align 5
59 .set reorder
60ll_compare_irq:
61 li a0,7
62 move a1,sp
63 jal do_IRQ
64 nop
65 j ret_from_irq
66 nop
67
68 .align 5
69 .set reorder
70ll_pci_intA:
71 move a0,sp
72 jal pci_intA
73 nop
74 j ret_from_irq
75 nop
76
77#if 0
78 .align 5
79 .set reorder
80ll_pci_intB:
81 move a0,sp
82 jal pci_intB
83 nop
84 j ret_from_irq
85 nop
86
87 .align 5
88 .set reorder
89ll_pci_intC:
90 move a0,sp
91 jal pci_intC
92 nop
93 j ret_from_irq
94 nop
95#endif
96
97 .align 5
98 .set reorder
99ll_pci_intD:
100 move a0,sp
101 jal pci_intD
102 nop
103 j ret_from_irq
104 nop
105
106 .align 5
107 .set reorder
108ll_serial_irq:
109 li a0,6
110 move a1,sp
111 jal do_IRQ
112 nop
113 j ret_from_irq
114 nop
diff --git a/arch/mips/gt64120/ev64120/irq.c b/arch/mips/gt64120/ev64120/irq.c
index 3b186159b21a..46c468b26b30 100644
--- a/arch/mips/gt64120/ev64120/irq.c
+++ b/arch/mips/gt64120/ev64120/irq.c
@@ -46,14 +46,22 @@
46#include <asm/system.h> 46#include <asm/system.h>
47#include <asm/gt64120.h> 47#include <asm/gt64120.h>
48 48
49asmlinkage inline void pci_intA(struct pt_regs *regs) 49asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
50{ 50{
51 do_IRQ(GT_INTA, regs); 51 unsigned int pending = read_c0_status() & read_c0_cause();
52} 52
53 53 if (pending & STATUSF_IP4) /* int2 hardware line (timer) */
54asmlinkage inline void pci_intD(struct pt_regs *regs) 54 do_IRQ(4, regs);
55{ 55 else if (pending & STATUSF_IP2) /* int0 hardware line */
56 do_IRQ(GT_INTD, regs); 56 do_IRQ(GT_INTA, regs);
57 else if (pending & STATUSF_IP5) /* int3 hardware line */
58 do_IRQ(GT_INTD, regs);
59 else if (pending & STATUSF_IP6) /* int4 hardware line */
60 do_IRQ(6, regs);
61 else if (pending & STATUSF_IP7) /* compare int */
62 do_IRQ(7, regs);
63 else
64 spurious_interrupt(regs);
57} 65}
58 66
59static void disable_ev64120_irq(unsigned int irq_nr) 67static void disable_ev64120_irq(unsigned int irq_nr)
@@ -109,16 +117,11 @@ static struct hw_interrupt_type ev64120_irq_type = {
109 117
110void gt64120_irq_setup(void) 118void gt64120_irq_setup(void)
111{ 119{
112 extern asmlinkage void galileo_handle_int(void);
113
114 /* 120 /*
115 * Clear all of the interrupts while we change the able around a bit. 121 * Clear all of the interrupts while we change the able around a bit.
116 */ 122 */
117 clear_c0_status(ST0_IM); 123 clear_c0_status(ST0_IM);
118 124
119 /* Sets the exception_handler array. */
120 set_except_vector(0, galileo_handle_int);
121
122 local_irq_disable(); 125 local_irq_disable();
123 126
124 /* 127 /*
diff --git a/arch/mips/gt64120/momenco_ocelot/Makefile b/arch/mips/gt64120/momenco_ocelot/Makefile
index 7b59c6567c79..6f708df8373b 100644
--- a/arch/mips/gt64120/momenco_ocelot/Makefile
+++ b/arch/mips/gt64120/momenco_ocelot/Makefile
@@ -2,7 +2,7 @@
2# Makefile for Momentum's Ocelot board. 2# Makefile for Momentum's Ocelot board.
3# 3#
4 4
5obj-y += int-handler.o irq.o prom.o reset.o setup.o 5obj-y += irq.o prom.o reset.o setup.o
6 6
7obj-$(CONFIG_KGDB) += dbg_io.o 7obj-$(CONFIG_KGDB) += dbg_io.o
8 8
diff --git a/arch/mips/gt64120/momenco_ocelot/int-handler.S b/arch/mips/gt64120/momenco_ocelot/int-handler.S
deleted file mode 100644
index 808acef248cc..000000000000
--- a/arch/mips/gt64120/momenco_ocelot/int-handler.S
+++ /dev/null
@@ -1,131 +0,0 @@
1/*
2 * Copyright 2001 MontaVista Software Inc.
3 * Author: jsun@mvista.com or jsun@junsun.net
4 *
5 * First-level interrupt dispatcher for ocelot board.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12#include <asm/asm.h>
13#include <asm/mipsregs.h>
14#include <asm/addrspace.h>
15#include <asm/regdef.h>
16#include <asm/stackframe.h>
17
18/*
19 * first level interrupt dispatcher for ocelot board -
20 * We check for the timer first, then check PCI ints A and D.
21 * Then check for serial IRQ and fall through.
22 */
23 .align 5
24 NESTED(ocelot_handle_int, PT_SIZE, sp)
25 SAVE_ALL
26 CLI
27 .set at
28 mfc0 t0, CP0_CAUSE
29 mfc0 t2, CP0_STATUS
30
31 and t0, t2
32
33 andi t1, t0, STATUSF_IP2 /* int0 hardware line */
34 bnez t1, ll_pri_enet_irq
35 andi t1, t0, STATUSF_IP3 /* int1 hardware line */
36 bnez t1, ll_sec_enet_irq
37 andi t1, t0, STATUSF_IP4 /* int2 hardware line */
38 bnez t1, ll_uart1_irq
39 andi t1, t0, STATUSF_IP5 /* int3 hardware line */
40 bnez t1, ll_cpci_irq
41 andi t1, t0, STATUSF_IP6 /* int4 hardware line */
42 bnez t1, ll_galileo_irq
43 andi t1, t0, STATUSF_IP7 /* cpu timer */
44 bnez t1, ll_cputimer_irq
45
46 /* now look at the extended interrupts */
47 mfc0 t0, CP0_CAUSE
48 cfc0 t1, CP0_S1_INTCONTROL
49
50 /* shift the mask 8 bits left to line up the bits */
51 sll t2, t1, 8
52
53 and t0, t2
54 srl t0, t0, 16
55
56 andi t1, t0, STATUSF_IP8 /* int6 hardware line */
57 bnez t1, ll_pmc1_irq
58 andi t1, t0, STATUSF_IP9 /* int7 hardware line */
59 bnez t1, ll_pmc2_irq
60 andi t1, t0, STATUSF_IP10 /* int8 hardware line */
61 bnez t1, ll_cpci_abcd_irq
62 andi t1, t0, STATUSF_IP11 /* int9 hardware line */
63 bnez t1, ll_uart2_irq
64
65 .set reorder
66
67 /* wrong alarm or masked ... */
68 j spurious_interrupt
69 nop
70 END(ocelot_handle_int)
71
72 .align 5
73ll_pri_enet_irq:
74 li a0, 2
75 move a1, sp
76 jal do_IRQ
77 j ret_from_irq
78
79ll_sec_enet_irq:
80 li a0, 3
81 move a1, sp
82 jal do_IRQ
83 j ret_from_irq
84
85ll_uart1_irq:
86 li a0, 4
87 move a1, sp
88 jal do_IRQ
89 j ret_from_irq
90
91ll_cpci_irq:
92 li a0, 5
93 move a1, sp
94 jal do_IRQ
95 j ret_from_irq
96
97ll_galileo_irq:
98 li a0, 6
99 move a1, sp
100 jal do_IRQ
101 j ret_from_irq
102
103ll_cputimer_irq:
104 li a0, 7
105 move a1, sp
106 jal do_IRQ
107 j ret_from_irq
108
109ll_pmc1_irq:
110 li a0, 8
111 move a1, sp
112 jal do_IRQ
113 j ret_from_irq
114
115ll_pmc2_irq:
116 li a0, 9
117 move a1, sp
118 jal do_IRQ
119 j ret_from_irq
120
121ll_cpci_abcd_irq:
122 li a0, 10
123 move a1, sp
124 jal do_IRQ
125 j ret_from_irq
126
127ll_uart2_irq:
128 li a0, 11
129 move a1, sp
130 jal do_IRQ
131 j ret_from_irq
diff --git a/arch/mips/gt64120/momenco_ocelot/irq.c b/arch/mips/gt64120/momenco_ocelot/irq.c
index 4f108da71b23..885f67f32ea3 100644
--- a/arch/mips/gt64120/momenco_ocelot/irq.c
+++ b/arch/mips/gt64120/momenco_ocelot/irq.c
@@ -48,7 +48,38 @@
48#include <asm/mipsregs.h> 48#include <asm/mipsregs.h>
49#include <asm/system.h> 49#include <asm/system.h>
50 50
51extern asmlinkage void ocelot_handle_int(void); 51asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
52{
53 unsigned int pending = read_c0_status() & read_c0_cause();
54
55 if (pending & STATUSF_IP2) /* int0 hardware line */
56 do_IRQ(2, regs);
57 else if (pending & STATUSF_IP3) /* int1 hardware line */
58 do_IRQ(3, regs);
59 else if (pending & STATUSF_IP4) /* int2 hardware line */
60 do_IRQ(4, regs);
61 else if (pending & STATUSF_IP5) /* int3 hardware line */
62 do_IRQ(5, regs);
63 else if (pending & STATUSF_IP6) /* int4 hardware line */
64 do_IRQ(6, regs);
65 else if (pending & STATUSF_IP7) /* cpu timer */
66 do_IRQ(7, regs);
67 else {
68 /*
69 * Now look at the extended interrupts
70 */
71 pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
72
73 if (pending & STATUSF_IP8) /* int6 hardware line */
74 do_IRQ(8, regs);
75 else if (pending & STATUSF_IP9) /* int7 hardware line */
76 do_IRQ(9, regs);
77 else if (pending & STATUSF_IP10) /* int8 hardware line */
78 do_IRQ(10, regs);
79 else if (pending & STATUSF_IP11) /* int9 hardware line */
80 do_IRQ(11, regs);
81 }
82}
52 83
53void __init arch_init_irq(void) 84void __init arch_init_irq(void)
54{ 85{
@@ -59,9 +90,6 @@ void __init arch_init_irq(void)
59 clear_c0_status(ST0_IM); 90 clear_c0_status(ST0_IM);
60 local_irq_disable(); 91 local_irq_disable();
61 92
62 /* Sets the first-level interrupt dispatcher. */
63 set_except_vector(0, ocelot_handle_int);
64
65 mips_cpu_irq_init(0); 93 mips_cpu_irq_init(0);
66 rm7k_cpu_irq_init(8); 94 rm7k_cpu_irq_init(8);
67} 95}
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