diff options
Diffstat (limited to 'arch/mips/gt64120/ev64120/int-handler.S')
-rw-r--r-- | arch/mips/gt64120/ev64120/int-handler.S | 113 |
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 | ||
49 | ll_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 | ||
59 | ll_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 | ||
69 | ll_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 | ||
79 | ll_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 | ||
88 | ll_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 | ||
98 | ll_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 | ||
107 | ll_serial_irq: | ||
108 | li a0,6 | ||
109 | move a1,sp | ||
110 | jal do_IRQ | ||
111 | nop | ||
112 | j ret_from_irq | ||
113 | nop | ||