| 1 | /*
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| 2 | * Copyright (c) 2017 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 | #include <abi/asmtool.h>
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| 30 | #include <arch/boot/boot.h>
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| 31 | #include <arch/cpu.h>
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| 32 |
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| 33 | .section K_TEXT_START, "ax"
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| 34 |
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| 35 | SYMBOL(kernel_image_start)
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| 36 | /* Setup temporary stack */
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| 37 | la sp, temp_stack
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| 38 |
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| 39 | /* Create the first stack frame */
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| 40 | addi sp, sp, -16
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| 41 |
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| 42 | /* Call riscv64_pre_main() */
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| 43 | jal riscv64_pre_main
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| 44 |
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| 45 | /* Call main_bsp() */
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| 46 | jal main_bsp
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| 47 |
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| 48 | /* Not reached */
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| 49 | csrci sstatus, SSTATUS_SIE_MASK
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| 50 | hlt0:
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| 51 | wfi
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| 52 | j hlt0
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| 53 |
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| 54 | .data
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| 55 |
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| 56 | .align 16
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| 57 | .space TEMP_STACK_SIZE
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| 58 | temp_stack:
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