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-rw-r--r--arch/mips/gt64120/ev64120/int-handler.S113
1 files changed, 113 insertions, 0 deletions
diff --git a/arch/mips/gt64120/ev64120/int-handler.S b/arch/mips/gt64120/ev64120/int-handler.S
new file mode 100644
index 000000000000..752435faf2de
--- /dev/null
+++ b/arch/mips/gt64120/ev64120/int-handler.S
@@ -0,0 +1,113 @@
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 j spurious_interrupt
43 nop
44 END(galileo_handle_int)
45
46
47 .align 5
48 .set reorder
49ll_gt64120_irq:
50 li a0,4
51 move a1,sp
52 jal do_IRQ
53 nop
54 j ret_from_irq
55 nop
56
57 .align 5
58 .set reorder
59ll_compare_irq:
60 li a0,7
61 move a1,sp
62 jal do_IRQ
63 nop
64 j ret_from_irq
65 nop
66
67 .align 5
68 .set reorder
69ll_pci_intA:
70 move a0,sp
71 jal pci_intA
72 nop
73 j ret_from_irq
74 nop
75
76#if 0
77 .align 5
78 .set reorder
79ll_pci_intB:
80 move a0,sp
81 jal pci_intB
82 nop
83 j ret_from_irq
84 nop
85
86 .align 5
87 .set reorder
88ll_pci_intC:
89 move a0,sp
90 jal pci_intC
91 nop
92 j ret_from_irq
93 nop
94#endif
95
96 .align 5
97 .set reorder
98ll_pci_intD:
99 move a0,sp
100 jal pci_intD
101 nop
102 j ret_from_irq
103 nop
104
105 .align 5
106 .set reorder
107ll_serial_irq:
108 li a0,6
109 move a1,sp
110 jal do_IRQ
111 nop
112 j ret_from_irq
113 nop