50 lines
736 B
ArmAsm
50 lines
736 B
ArmAsm
.section .init;
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.globl _start;
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.type _start,@function
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_start:
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.option push
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.option norelax
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la gp, __global_pointer$
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.option pop
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la sp, _sp
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#ifdef SIMULATION
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/* clear sim result flags */
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csrrwi x0, sstatus, 0x0
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#endif
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/* Load data section */
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la a0, _data_lma
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la a1, _data
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la a2, _edata
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bgeu a1, a2, 2f
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1:
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lw t0, (a0)
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sw t0, (a1)
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addi a0, a0, 4
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addi a1, a1, 4
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bltu a1, a2, 1b
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2:
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/* Clear bss section */
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la a0, __bss_start
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la a1, _end
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bgeu a0, a1, 2f
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1:
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sw zero, (a0)
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addi a0, a0, 4
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bltu a0, a1, 1b
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2:
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/* set exception and interrupt entry */
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la a0, trap_entry
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csrw mtvec, a0
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li a0, 0
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li a1, 0
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call main
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loop:
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j loop
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