| 1 | #
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| 2 | # Copyright (c) 2006 Martin Decky
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| 3 | # Copyright (c) 2006 Jakub Jermar
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| 4 | # All rights reserved.
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| 5 | #
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| 6 | # Redistribution and use in source and binary forms, with or without
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| 7 | # modification, are permitted provided that the following conditions
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| 8 | # are met:
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| 9 | #
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| 10 | # - Redistributions of source code must retain the above copyright
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| 11 | # notice, this list of conditions and the following disclaimer.
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| 12 | # - Redistributions in binary form must reproduce the above copyright
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| 13 | # notice, this list of conditions and the following disclaimer in the
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| 14 | # documentation and/or other materials provided with the distribution.
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| 15 | # - The name of the author may not be used to endorse or promote products
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| 16 | # derived from this software without specific prior written permission.
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| 17 | #
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| 18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | #
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| 29 |
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| 30 | #include <arch/arch.h>
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| 31 |
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| 32 | .section BOOTSTRAP, "ax"
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| 33 |
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| 34 | .global start
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| 35 | start:
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| 36 | movl gp = __gp
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| 37 |
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| 38 | #
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| 39 | # Save the boot parameter structure address passed from the
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| 40 | # ELILO-compatible EFI loader.
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| 41 | #
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| 42 | movl r8 = bootpar ;;
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| 43 | st8 [r8] = r28
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| 44 |
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| 45 | #
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| 46 | # Initialize the register stack to some sane value.
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| 47 | #
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| 48 | mov ar.rsc = r0
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| 49 | movl r8 = initial_stack ;;
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| 50 | mov ar.bspstore = r8
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| 51 | loadrs
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| 52 |
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| 53 | #
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| 54 | # Initialize memory stack to some sane value and allocate a scratch area
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| 55 | # on it.
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| 56 | #
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| 57 | movl r12 = initial_stack_top ;;
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| 58 | add r12 = -16, r12
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| 59 |
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| 60 | #
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| 61 | # Disable Floating-point High register set (f32 - f127)
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| 62 | #
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| 63 | ssm (1 << 19) ;;
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| 64 | srlz.i
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| 65 | srlz.d ;;
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| 66 |
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| 67 | br.call.sptk.many rp = bootstrap
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| 68 |
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| 69 | .bss
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| 70 |
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| 71 | .global bootpar
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| 72 | bootpar:
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| 73 | .quad 0
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| 74 |
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| 75 | .align STACK_SIZE
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| 76 | initial_stack:
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| 77 | .space STACK_SIZE
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| 78 | initial_stack_top:
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