source: soft/tp12/correction/reset.s @ 97

#################################################################################
#       File : reset.s
#       Author : Alain Greiner
#       Date : 28/08/2006
#################################################################################
#       This is a minimal boot code : 
#       - It initializes the Status Register (SR) 
#       - It defines the stack size  and initializes the stack pointer ($29) 
#       - It initializes the global pointer ($28) that is used by GCC to
#         optimize acces to the global variables.
#       - It initializes the EPC register, and jump to the main address
#################################################################################
                
        .section .reset,"ax",@progbits

        .extern seg_stack_base
        .extern seg_data_base
        .extern main

        .globl  reset                           # makes reset an external symbol 
        .ent    reset
        .func   reset
        .align  2

reset:
        .set noreorder

# initializes SR register
        li      $26,    0x00000013              
        mtc0    $26,    $12                     

# initializes stack pointer
        la      $29,    seg_stack_base
        addiu   $29,    $29,    0x4000  

# initializes global pointer
        la      $28,    seg_data_base   

# jump to main in kernel mode
        la      $26,    main
        mtc0    $26,    $14
        eret

        .end    reset
        .size   reset, .-reset

        .set reorder