1 | /* |
---|
2 | * Copyright (c) 2011 Aeroflex Gaisler |
---|
3 | * |
---|
4 | * BSD license: |
---|
5 | * |
---|
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
---|
7 | * of this software and associated documentation files (the "Software"), to deal |
---|
8 | * in the Software without restriction, including without limitation the rights |
---|
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
---|
10 | * copies of the Software, and to permit persons to whom the Software is |
---|
11 | * furnished to do so, subject to the following conditions: |
---|
12 | * |
---|
13 | * The above copyright notice and this permission notice shall be included in |
---|
14 | * all copies or substantial portions of the Software. |
---|
15 | * |
---|
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
---|
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
---|
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
---|
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
---|
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
---|
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
---|
22 | * THE SOFTWARE. |
---|
23 | */ |
---|
24 | |
---|
25 | |
---|
26 | #include <asm-leon/leonstack.h> |
---|
27 | #include <asm-leon/irq.h> |
---|
28 | #define NULL 0 |
---|
29 | |
---|
30 | /* single vector trapping version of trap handler installs */ |
---|
31 | struct svt_trap_entry |
---|
32 | { |
---|
33 | int start, end, func; |
---|
34 | }; |
---|
35 | extern struct svt_trap_entry trap_table[28]; |
---|
36 | extern struct svt_trap_entry svt_trap_table_ext[17]; |
---|
37 | extern struct svt_trap_entry svt_trap_table_ext_end; |
---|
38 | |
---|
39 | static struct svt_trap_entry * |
---|
40 | gettrap_pos (int nr) |
---|
41 | { |
---|
42 | struct svt_trap_entry *p = trap_table; |
---|
43 | while ((p->start) || (p->end) || (p->func)) |
---|
44 | { |
---|
45 | if (p->start <= nr && p->end >= nr) |
---|
46 | { |
---|
47 | break; |
---|
48 | } |
---|
49 | p++; |
---|
50 | } |
---|
51 | return p; |
---|
52 | } |
---|
53 | |
---|
54 | int |
---|
55 | svtloleveltrapinstall (int trap, void (*handler) ()) |
---|
56 | { |
---|
57 | struct svt_trap_entry *p = gettrap_pos (trap); |
---|
58 | if (p >= &svt_trap_table_ext_end) |
---|
59 | { |
---|
60 | return 0; |
---|
61 | } |
---|
62 | p->start = trap; |
---|
63 | p->end = trap; |
---|
64 | p->func = handler; |
---|
65 | return 1; |
---|
66 | } |
---|
67 | |
---|
68 | int |
---|
69 | svtlolevelirqinstall (int irqnr, void (*handler) ()) |
---|
70 | { |
---|
71 | if (irqnr == 0 || irqnr >= 15) |
---|
72 | { |
---|
73 | return 0; |
---|
74 | } |
---|
75 | return svtloleveltrapinstall (irqnr + 0x10, handler); |
---|
76 | } |
---|