| 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/head.h> |
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| 27 | |
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| 28 | .section .text |
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| 29 | /* ------- */ |
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| 30 | .weak _hardreset_svt |
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| 31 | .set _hardreset_svt, __hardreset_svt |
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| 32 | /* ------- */ |
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| 33 | .global _hardreset, _hardreset_svt_real |
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| 34 | |
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| 35 | ! reset entry point for single vector trapping. Try enable svt |
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| 36 | _hardreset_svt_real: |
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| 37 | nop |
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| 38 | __hardreset_svt: |
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| 39 | mov %psr, %l3 |
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| 40 | srl %l3, 24, %g5 |
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| 41 | and %g5, 3, %g5 |
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| 42 | subcc %g5, 3, %g0 ! leon2: 0 or 2, leon3: 3 |
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| 43 | bne .L2 |
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| 44 | nop |
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| 45 | |
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| 46 | mov %asr17, %g5 ! set svt |
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| 47 | set 1<<13,%g1 |
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| 48 | or %g5,%g1,%g5 |
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| 49 | mov %g5, %asr17 |
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| 50 | nop; nop; nop |
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| 51 | mov %asr17,%g5 ! check svt |
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| 52 | andcc %g5, %g1, %g0 |
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| 53 | beq .L2 |
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| 54 | nop |
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| 55 | |
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| 56 | set _hardreset,%l3 |
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| 57 | jmp %l3 |
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| 58 | nop |
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| 59 | |
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| 60 | .L2: ta 0x0 ! no svt implemented (ether leon2 or svt != 1) |
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| 61 | nop |
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| 62 | |
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