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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