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1.1 root 1: {\rtf0\ansi{\fonttbl\f0\fmodern Ohlfs;\f1\fswiss Helvetica;}
2: \paperw13040
3: \paperh10200
4: \margl120
5: \margr120
6: {\colortbl\red0\green0\blue0;}
7: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520\f0\b0\i0\ul0\fs24 Here's a proposal for an interface between the NRW DMA module (which I'm writing) and the interrupt module. Note that there is no access checking a la dev_port or the device_master port; these functions are only used by the kernel's DMA module. \
8: \
9:
10: \pard\tx1040\tx2100\tx3160\tx4220\tx5280\tx6320\tx7380\tx8440\tx9500\tx10560\f1
11: \b kern_return_t
12: \b0 \
13:
14: \b kern_intr_map(\
15: dev_num_t *
16: \b0 global_dev_num,
17: \b \
18: kern_port_t
19: \b0 intr_port
20: \b );\
21:
22: \b0 \
23:
24: \b kern_intr_map
25: \b0\i
26: \i0 causes interrupts detected for device global_dev_num to be \
27: dispatched to
28: \i intr_port
29: \i0 .\
30:
31: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520 \
32:
33: \pard\tx1040\tx2100\tx3160\tx4220\tx5280\tx6320\tx7380\tx8440\tx9500\tx10560
34: \b kern_return_t
35: \b0 \
36:
37: \b kern_intr_unmap(\
38:
39: \b0\i
40: \b\i0 dev_num_t
41: \b0\i
42: \i0 global_dev_num
43: \b );\
44:
45: \b0 \
46:
47: \b kern_intr_unmap
48: \b0\i
49: \i0 causes the interrupt-to-port mapping established in \
50: kern_intr_map() to be deleted.\
51: \
52: Returns
53: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520\fc0 KERN_NO_ACCESS
54: \pard\tx1040\tx2100\tx3160\tx4220\tx5280\tx6320\tx7380\tx8440\tx9500\tx10560\fc0 if
55: \i global_dev_num
56: \i0 currently has no valid mapping,\
57: else returns KERN_SUCCESS. \
58:
59: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520 \
60:
61: \pard\tx1040\tx2100\tx3160\tx4220\tx5280\tx6320\tx7380\tx8440\tx9500\tx10560
62: \b kern_return_t
63: \b0 \
64:
65: \b kern_intr_enable(\
66:
67: \b0\i
68: \b\i0 dev_num_t
69: \b0\i
70: \i0 global_dev_num
71: \b );\
72:
73: \b0 \
74:
75: \b kern_intr_enable
76: \b0\i
77: \i0 causes interrupts from
78: \i global_dev_num
79: \i0 to be enabled. To\
80: enable interrupts for a given global_dev_num, the device's bit in IACTIVE must be\
81: cleared. <What about the device's bit in the two IACCEPT registers?>\
82: \
83: Returns
84: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520\fc0 KERN_NO_ACCESS
85: \pard\tx1040\tx2100\tx3160\tx4220\tx5280\tx6320\tx7380\tx8440\tx9500\tx10560\fc0 if
86: \i global_dev_num
87: \i0 currently has no valid mapping,\
88: else returns KERN_SUCCESS. \
89: \
90:
91: \b kern_return_t
92: \b0 \
93:
94: \b kern_intr_disable(\
95:
96: \b0\i
97: \b\i0 dev_num_t
98: \b0\i
99: \i0 global_dev_num
100: \b );\
101:
102: \b0 \
103:
104: \b kern_intr_disable
105: \b0\i
106: \i0 causes interrupts from
107: \i global_dev_num
108: \i0 to be disabled. \
109: <What happends here - is this device's bit in both IACCEPT registers cleared?>\
110: \
111: Returns
112: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520\fc0 KERN_NO_ACCESS
113: \pard\tx1040\tx2100\tx3160\tx4220\tx5280\tx6320\tx7380\tx8440\tx9500\tx10560\fc0 if
114: \i global_dev_num
115: \i0 currently has no valid mapping,\
116: else returns KERN_SUCCESS. \
117:
118: }
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