crt0.s

来自「基于4个mips核的noc设计」· S 代码 · 共 50 行

	.equ	stack_size, 		710
	.equ	heap_size,		    1

	.text
    .align  2

	.globl	_bup_sad
	.globl	_bup_happy 

    .ent    _start

_start:
	nop                               # Bug: First instruction on mMIPS is not executed
    
    la      $gp, _gp                  # globals pointer
    la      $sp, _end                 # stack pointer (stack starts at end of ram)
    la      $fp, _end                 # frame pointer

# Dynamic memory allocation skipped because of limited memory size.
#    la      $4, heap                  # heap start address
#    li      $5, heap_size             # heap size
#    jal     add_free                  # init heap
#    nop
#    move    $4, $0                    
#    move    $5, $0                    

    jal     main                      # jump past happy and sad addresses

L1:    
    j       L1

    .align 5
_bup_happy:
    j       L1                        # Stop simulation
    
    .align 5
_bup_sad:
    j       L1                        # Stop simulation

	.bss
stack:
        .align 	2
        .space 	stack_size
stack_top:
	.word	0

heap:
	.align  2
        .space  heap_size