| 1 | #
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| 2 | # Copyright (c) 2006 Martin Decky
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| 3 | # All rights reserved.
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| 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 |
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| 29 | .text
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| 30 |
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| 31 | .global context_save
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| 32 | .global context_restore
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| 33 |
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| 34 | #include <libarch/regname.h>
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| 35 | #include <libarch/fibril_context.h>
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| 36 |
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| 37 | context_save:
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| 38 | stw sp, CONTEXT_OFFSET_SP(r3)
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| 39 | stw r2, CONTEXT_OFFSET_TLS(r3)
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| 40 | stw r13, CONTEXT_OFFSET_R13(r3)
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| 41 | stw r14, CONTEXT_OFFSET_R14(r3)
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| 42 | stw r15, CONTEXT_OFFSET_R15(r3)
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| 43 | stw r16, CONTEXT_OFFSET_R16(r3)
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| 44 | stw r17, CONTEXT_OFFSET_R17(r3)
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| 45 | stw r18, CONTEXT_OFFSET_R18(r3)
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| 46 | stw r19, CONTEXT_OFFSET_R19(r3)
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| 47 | stw r20, CONTEXT_OFFSET_R20(r3)
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| 48 | stw r21, CONTEXT_OFFSET_R21(r3)
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| 49 | stw r22, CONTEXT_OFFSET_R22(r3)
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| 50 | stw r23, CONTEXT_OFFSET_R23(r3)
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| 51 | stw r24, CONTEXT_OFFSET_R24(r3)
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| 52 | stw r25, CONTEXT_OFFSET_R25(r3)
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| 53 | stw r26, CONTEXT_OFFSET_R26(r3)
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| 54 | stw r27, CONTEXT_OFFSET_R27(r3)
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| 55 | stw r28, CONTEXT_OFFSET_R28(r3)
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| 56 | stw r29, CONTEXT_OFFSET_R29(r3)
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| 57 | stw r30, CONTEXT_OFFSET_R30(r3)
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| 58 | stw r31, CONTEXT_OFFSET_R31(r3)
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| 59 |
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| 60 | mflr r4
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| 61 | stw r4, CONTEXT_OFFSET_PC(r3)
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| 62 |
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| 63 | mfcr r4
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| 64 | stw r4, CONTEXT_OFFSET_CR(r3)
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| 65 |
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| 66 | # context_save returns 1
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| 67 | li r3, 1
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| 68 | blr
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| 69 |
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| 70 |
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| 71 | context_restore:
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| 72 | lwz sp, CONTEXT_OFFSET_SP(r3)
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| 73 | lwz r2, CONTEXT_OFFSET_TLS(r3)
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| 74 | lwz r13, CONTEXT_OFFSET_R13(r3)
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| 75 | lwz r14, CONTEXT_OFFSET_R14(r3)
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| 76 | lwz r15, CONTEXT_OFFSET_R15(r3)
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| 77 | lwz r16, CONTEXT_OFFSET_R16(r3)
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| 78 | lwz r17, CONTEXT_OFFSET_R17(r3)
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| 79 | lwz r18, CONTEXT_OFFSET_R18(r3)
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| 80 | lwz r19, CONTEXT_OFFSET_R19(r3)
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| 81 | lwz r20, CONTEXT_OFFSET_R20(r3)
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| 82 | lwz r21, CONTEXT_OFFSET_R21(r3)
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| 83 | lwz r22, CONTEXT_OFFSET_R22(r3)
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| 84 | lwz r23, CONTEXT_OFFSET_R23(r3)
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| 85 | lwz r24, CONTEXT_OFFSET_R24(r3)
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| 86 | lwz r25, CONTEXT_OFFSET_R25(r3)
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| 87 | lwz r26, CONTEXT_OFFSET_R26(r3)
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| 88 | lwz r27, CONTEXT_OFFSET_R27(r3)
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| 89 | lwz r28, CONTEXT_OFFSET_R28(r3)
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| 90 | lwz r29, CONTEXT_OFFSET_R29(r3)
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| 91 | lwz r30, CONTEXT_OFFSET_R30(r3)
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| 92 | lwz r31, CONTEXT_OFFSET_R31(r3)
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| 93 |
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| 94 | lwz r4, CONTEXT_OFFSET_CR(r3)
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| 95 | mtcr r4
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| 96 |
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| 97 | lwz r4, CONTEXT_OFFSET_PC(r3)
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| 98 | mtlr r4
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| 99 |
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| 100 | # context_restore returns 0
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| 101 | li r3, 0
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| 102 | blr
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