Subversion Repositories mips789

##################################################################
# TITLE: Boot Up Code
# AUTHOR: Steve Rhoads (rhoadss@yahoo.com)
# DATE CREATED: 1/12/02
# FILENAME: boot.asm
# PROJECT: Plasma CPU core
# COPYRIGHT: Software placed into the public domain by the author.
#    Software 'as is' without warranty.  Author liable for nothing.
# DESCRIPTION:
#    Initializes the stack pointer and jumps to main2().
##################################################################
        .text
        .align  2
        .globl  entry
        .ent    entry
entry:
   .set noreorder

   #These eight instructions must be the first instructions.
   #convert.exe will correctly initialize $gp
   lui   $gp,0
   ori   $gp,$gp,0
   #convert.exe will set $4=.sbss_start $5=.bss_end
   lui   $4,0
   ori   $4,$4,0
   lui   $5,0
   ori   $5,$5,0
   lui   $sp,0
   ori   $sp,$sp,0xfff0     #initialize stack pointer
$BSS_CLEAR:
   sw    $0,0($4)
   slt   $3,$4,$5
   bnez  $3,$BSS_CLEAR
   addiu $4,$4,4

   jal   main2
   nop
$L1:
   j $L1

   .set reorder
        .end    entry