#
# Copyright (c) 2016 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <abi/asmtool.h>
#include <arch/arch.h>

.section BOOTSTRAP

.org DEFAULT_MTVEC + TRAP_VECTOR_RESET
SYMBOL(start)
	/* Set up machine state */
	li x1, 0
	li x2, 0
	li x3, 0
	li x4, 0
	li x5, 0
	li x6, 0
	li x7, 0
	li x8, 0
	li x9, 0
	li x10, 0
	li x11, 0
	li x12, 0
	li x13, 0
	li x14, 0
	li x15, 0
	li x16, 0
	li x17, 0
	li x18, 0
	li x19, 0
	li x20, 0
	li x21, 0
	li x22, 0
	li x23, 0
	li x24, 0
	li x25, 0
	li x26, 0
	li x27, 0
	li x28, 0
	li x29, 0
	li x30, 0
	li x31, 0
	
	/* Set up stack, create stack frame */
	la sp, boot_stack + BOOT_STACK_SIZE
	addi sp, sp, -16
	
	j bootstrap

.text

FUNCTION_BEGIN(jump_to_kernel)
	j halt
FUNCTION_END(jump_to_kernel)

FUNCTION_BEGIN(halt)
	j halt
FUNCTION_END(halt)

.data

.align PAGE_WIDTH
SYMBOL(boot_stack)
	.space BOOT_STACK_SIZE