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#

# Copyright (c) 2007 Michal Kebrt

# 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

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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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#

#include <arch/asm/boot.h>

.text

.global kernel_image_start

.global exc_stack

.global supervisor_sp

kernel_image_start:

	# initialize Stack pointer for exception modes

	mrs r4, cpsr

	bic r4, r4, #0x1f

	#FIQ Mode

	orr r3, r4, #0x11

	msr cpsr_c, r3

	ldr sp, =exc_stack

	#IRQ Mode

	orr r3, r4, #0x12

	msr cpsr_c, r3

	ldr sp, =exc_stack

	#ABORT Mode

	orr r3, r4, #0x17

	msr cpsr_c, r3

	ldr sp, =exc_stack

	#UNDEFINED Mode

	orr r3, r4, #0x1b

	msr cpsr_c, r3

	ldr sp, =exc_stack

	# switch to supervisor mode

	orr r3, r4, #0x13

	msr cpsr_c, r3

	ldr sp, =temp_stack

	bl arch_pre_main

	bl main_bsp

	.space TEMP_STACK_SIZE

temp_stack:

	.space 1024

exc_stack:

supervisor_sp:

	.space 4