tinyriscv/sdk/bsp/crt0.S

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