[444] | 1 | /* |
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| 2 | * Copyright (c) 2011 Aeroflex Gaisler |
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| 3 | * |
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| 4 | * BSD license: |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 7 | * of this software and associated documentation files (the "Software"), to deal |
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| 8 | * in the Software without restriction, including without limitation the rights |
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| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 10 | * copies of the Software, and to permit persons to whom the Software is |
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| 11 | * furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included in |
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| 14 | * all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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| 22 | * THE SOFTWARE. |
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| 23 | */ |
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| 24 | |
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| 25 | |
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| 26 | #include <asm-leon/leonstack.h> |
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| 27 | #include <asm-leon/irq.h> |
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| 28 | #define NULL 0 |
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| 29 | |
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| 30 | /* single vector trapping version of trap handler installs */ |
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| 31 | struct svt_trap_entry |
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| 32 | { |
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| 33 | int start, end, func; |
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| 34 | }; |
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| 35 | extern struct svt_trap_entry trap_table[28]; |
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| 36 | extern struct svt_trap_entry svt_trap_table_ext[17]; |
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| 37 | extern struct svt_trap_entry svt_trap_table_ext_end; |
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| 38 | |
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| 39 | static struct svt_trap_entry * |
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| 40 | gettrap_pos (int nr) |
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| 41 | { |
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| 42 | struct svt_trap_entry *p = trap_table; |
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| 43 | while ((p->start) || (p->end) || (p->func)) |
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| 44 | { |
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| 45 | if (p->start <= nr && p->end >= nr) |
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| 46 | { |
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| 47 | break; |
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| 48 | } |
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| 49 | p++; |
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| 50 | } |
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| 51 | return p; |
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| 52 | } |
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| 53 | |
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| 54 | int |
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| 55 | svtloleveltrapinstall (int trap, void (*handler) ()) |
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| 56 | { |
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| 57 | struct svt_trap_entry *p = gettrap_pos (trap); |
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| 58 | if (p >= &svt_trap_table_ext_end) |
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| 59 | { |
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| 60 | return 0; |
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| 61 | } |
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| 62 | p->start = trap; |
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| 63 | p->end = trap; |
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| 64 | p->func = handler; |
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| 65 | return 1; |
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| 66 | } |
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| 67 | |
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| 68 | int |
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| 69 | svtlolevelirqinstall (int irqnr, void (*handler) ()) |
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| 70 | { |
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| 71 | if (irqnr == 0 || irqnr >= 15) |
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| 72 | { |
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| 73 | return 0; |
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| 74 | } |
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| 75 | return svtloleveltrapinstall (irqnr + 0x10, handler); |
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| 76 | } |
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