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#
# Copyright (c) 2005 Jakub Jermar
# 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,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

#include <arch/asm/regname.h>
#include <arch/boot/boot.h>

.section K_TEXT_START, "ax"

.global kernel_image_start
kernel_image_start:
    
    # load temporal kernel stack
    
    lis sp, kernel_stack@ha
    addi sp, sp, kernel_stack@l
    
    # set kernel stack for interrupt handling
    
    mr r31, sp
    subis r31, r31, 0x8000
    mtsprg0 r31
    
    # r3 contains physical address of bootinfo_t
    # r4 contains size of bootinfo_t
    
    cmpwi r4, 0
    beq bootinfo_end
    
    addis r3, r3, 0x8000
    
    lis r31, bootinfo@ha
    addi r31, r31, bootinfo@l  # r31 = bootinfo
    
    bootinfo_loop:
        
        lwz r30, 0(r3)
        stw r30, 0(r31)
        
        addi r3, r3, 4
        addi r31, r31, 4
        subi r4, r4, 4
        
        cmpwi r4, 0
        bgt bootinfo_loop
        
    bootinfo_end:
    
    bl arch_pre_main
    b main_bsp

.section K_DATA_START, "aw", @progbits

.align 12
kernel_stack_bottom:
    .space TEMP_STACK_SIZE
kernel_stack: