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1 | jermar | 1 | # |
2071 | jermar | 2 | # Copyright (c) 2003-2004 Jakub Jermar |
1 | jermar | 3 | # All rights reserved. |
4 | # |
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5 | # Redistribution and use in source and binary forms, with or without |
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6 | # modification, are permitted provided that the following conditions |
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7 | # are met: |
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8 | # |
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9 | # - Redistributions of source code must retain the above copyright |
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10 | # notice, this list of conditions and the following disclaimer. |
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11 | # - Redistributions in binary form must reproduce the above copyright |
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12 | # notice, this list of conditions and the following disclaimer in the |
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13 | # documentation and/or other materials provided with the distribution. |
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14 | # - The name of the author may not be used to endorse or promote products |
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15 | # derived from this software without specific prior written permission. |
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16 | # |
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17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | # |
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28 | |||
306 | palkovsky | 29 | #include <arch/asm/regname.h> |
317 | palkovsky | 30 | #include <arch/context_offset.h> |
306 | palkovsky | 31 | |
1 | jermar | 32 | .text |
33 | |||
34 | .set noat |
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35 | .set noreorder |
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36 | .set nomacro |
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37 | |||
414 | jermar | 38 | .global context_save_arch |
39 | .global context_restore_arch |
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1 | jermar | 40 | |
306 | palkovsky | 41 | .macro CONTEXT_STORE r |
42 | sw $s0,OFFSET_S0(\r) |
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43 | sw $s1,OFFSET_S1(\r) |
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44 | sw $s2,OFFSET_S2(\r) |
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45 | sw $s3,OFFSET_S3(\r) |
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46 | sw $s4,OFFSET_S4(\r) |
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47 | sw $s5,OFFSET_S5(\r) |
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48 | sw $s6,OFFSET_S6(\r) |
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49 | sw $s7,OFFSET_S7(\r) |
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484 | palkovsky | 50 | sw $s8,OFFSET_S8(\r) |
306 | palkovsky | 51 | sw $gp,OFFSET_GP(\r) |
52 | |||
53 | sw $ra,OFFSET_PC(\r) |
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54 | sw $sp,OFFSET_SP(\r) |
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55 | .endm |
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56 | |||
57 | .macro CONTEXT_LOAD r |
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58 | lw $s0,OFFSET_S0(\r) |
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59 | lw $s1,OFFSET_S1(\r) |
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60 | lw $s2,OFFSET_S2(\r) |
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61 | lw $s3,OFFSET_S3(\r) |
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62 | lw $s4,OFFSET_S4(\r) |
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63 | lw $s5,OFFSET_S5(\r) |
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64 | lw $s6,OFFSET_S6(\r) |
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65 | lw $s7,OFFSET_S7(\r) |
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484 | palkovsky | 66 | lw $s8,OFFSET_S8(\r) |
306 | palkovsky | 67 | lw $gp,OFFSET_GP(\r) |
68 | |||
69 | lw $ra,OFFSET_PC(\r) |
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70 | lw $sp,OFFSET_SP(\r) |
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71 | .endm |
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72 | |||
73 | |||
414 | jermar | 74 | context_save_arch: |
306 | palkovsky | 75 | CONTEXT_STORE $a0 |
1 | jermar | 76 | |
77 | # context_save returns 1 |
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78 | j $31 |
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79 | li $2, 1 |
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80 | |||
414 | jermar | 81 | context_restore_arch: |
306 | palkovsky | 82 | CONTEXT_LOAD $a0 |
1 | jermar | 83 | |
84 | # context_restore returns 0 |
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85 | j $31 |
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86 | xor $2, $2 |