52 lines
868 B
ArmAsm
52 lines
868 B
ArmAsm
/**
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* \brief Kernel startup code
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* \author Sebastian Sumpf
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* \author Stefan Kalkowski
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* \date 2015-06-010
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*/
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/*
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* Copyright (C) 2015-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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.set STACK_SIZE, 64 * 1024
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.section ".text.crt0"
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.global _start
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_start:
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j _start_next_page
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/* leave first page empty for mode-transition page located at 0x100 */
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.space 4096
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_start_next_page:
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/* clear the bss segment */
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la a0, _bss_start
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la a1, _bss_end
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1:
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sd x0, (a0)
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addi a0, a0, 8
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bne a0, a1, 1b
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la sp, _stack_area_start
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li a0, STACK_SIZE
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ld a0, (a0)
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add sp, sp, a0
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/* save kernel stack pointer in mscratch */
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csrw mscratch, sp
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jal setup_riscv_exception_vector
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jal init
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1: j 1b
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.align 3
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_stack_area_start:
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.space STACK_SIZE
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