| 1 | #
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| 2 | # Copyright (C) 2005 Jakub Jermar
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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 | .section K_TEXT_START
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| 30 |
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| 31 | .global kernel_image_start
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| 32 |
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| 33 | stack0:
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| 34 | kernel_image_start:
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| 35 | .auto
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| 36 |
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| 37 | # initialize PSR
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| 38 | mov psr.l = r0
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| 39 | srlz.i
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| 40 | srlz.d
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| 41 |
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| 42 | # initialize register stack
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| 43 | mov ar.rsc = r0
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| 44 | mov ar.bspstore = r0
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| 45 | loadrs
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| 46 |
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| 47 | .explicit
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| 48 | # initialize memory stack to some sane value
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| 49 | movl r12 = stack0 ;;
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| 50 | add r12 = - 16, r12 /* allocate a scratch area on the stack */
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| 51 |
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| 52 | # initialize gp (Global Pointer) register
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| 53 | movl r1 = _hardcoded_load_address
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| 54 |
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| 55 | ;;
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| 56 |
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| 57 | #
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| 58 | # Initialize hardcoded_* variables.
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| 59 | #
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| 60 | movl r14 = _hardcoded_ktext_size
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| 61 | movl r15 = _hardcoded_kdata_size
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| 62 | movl r16 = _hardcoded_load_address
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| 63 | addl r17 = @gprel(hardcoded_ktext_size), gp
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| 64 | addl r18 = @gprel(hardcoded_kdata_size), gp
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| 65 | addl r19 = @gprel(hardcoded_load_address), gp
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| 66 | ;;
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| 67 | st4 [r17] = r14
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| 68 | st4 [r18] = r15
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| 69 | st8 [r19] = r16
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| 70 |
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| 71 | br.call.sptk.many b0=main_bsp
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| 72 |
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| 73 | 0:
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| 74 | br 0b
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