source: mainline/arch/ppc32/src/boot/boot.S@ a33c990

#
# 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
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# - Redistributions of source code must retain the above copyright
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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#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
        
        addis r3, r3, 0x8000

        lis r31, bootinfo@ha
        addi r31, r31, bootinfo@l  # r31 = bootinfo
        
        cmpwi r4, 0
        beq bootinfo_end
        
        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: