2020-03-29 15:19:14 +00:00
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#define REGBYTES 4
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#define STORE sw
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#define LOAD lw
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2020-03-08 07:09:30 +00:00
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2020-03-29 15:19:14 +00:00
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.section .init;
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2020-03-08 07:09:30 +00:00
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.globl _start;
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2020-03-29 15:19:14 +00:00
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.type _start,@function
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2020-03-08 07:09:30 +00:00
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2020-03-29 15:19:14 +00:00
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.weak TIMER0_IRQHandler
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2020-03-08 07:09:30 +00:00
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_start:
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j _reset_handler
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2020-03-29 15:19:14 +00:00
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j _timer0_handler
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2020-03-08 07:09:30 +00:00
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_reset_handler:
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2020-03-29 15:19:14 +00:00
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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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2020-03-08 07:09:30 +00:00
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li x26, 0x00
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li x27, 0x00
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2020-03-29 15:19:14 +00:00
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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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2020-03-08 07:09:30 +00:00
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call main
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li x26, 0x01
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loop:
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j loop
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2020-03-29 15:19:14 +00:00
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_timer0_handler:
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addi sp, sp, -32*REGBYTES
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STORE x1, 1*REGBYTES(sp)
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STORE x2, 2*REGBYTES(sp)
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STORE x3, 3*REGBYTES(sp)
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STORE x4, 4*REGBYTES(sp)
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STORE x5, 5*REGBYTES(sp)
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STORE x6, 6*REGBYTES(sp)
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STORE x7, 7*REGBYTES(sp)
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STORE x8, 8*REGBYTES(sp)
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STORE x9, 9*REGBYTES(sp)
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STORE x10, 10*REGBYTES(sp)
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STORE x11, 11*REGBYTES(sp)
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STORE x12, 12*REGBYTES(sp)
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STORE x13, 13*REGBYTES(sp)
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STORE x14, 14*REGBYTES(sp)
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STORE x15, 15*REGBYTES(sp)
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STORE x16, 16*REGBYTES(sp)
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STORE x17, 17*REGBYTES(sp)
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STORE x18, 18*REGBYTES(sp)
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STORE x19, 19*REGBYTES(sp)
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STORE x20, 20*REGBYTES(sp)
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STORE x21, 21*REGBYTES(sp)
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STORE x22, 22*REGBYTES(sp)
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STORE x23, 23*REGBYTES(sp)
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STORE x24, 24*REGBYTES(sp)
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STORE x25, 25*REGBYTES(sp)
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#STORE x26, 26*REGBYTES(sp)
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#STORE x27, 27*REGBYTES(sp)
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STORE x28, 28*REGBYTES(sp)
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STORE x29, 29*REGBYTES(sp)
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STORE x30, 30*REGBYTES(sp)
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STORE x31, 31*REGBYTES(sp)
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call TIMER0_IRQHandler
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LOAD x1, 1*REGBYTES(sp)
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LOAD x2, 2*REGBYTES(sp)
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LOAD x3, 3*REGBYTES(sp)
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LOAD x4, 4*REGBYTES(sp)
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LOAD x5, 5*REGBYTES(sp)
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LOAD x6, 6*REGBYTES(sp)
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LOAD x7, 7*REGBYTES(sp)
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LOAD x8, 8*REGBYTES(sp)
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LOAD x9, 9*REGBYTES(sp)
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LOAD x10, 10*REGBYTES(sp)
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LOAD x11, 11*REGBYTES(sp)
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LOAD x12, 12*REGBYTES(sp)
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LOAD x13, 13*REGBYTES(sp)
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LOAD x14, 14*REGBYTES(sp)
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LOAD x15, 15*REGBYTES(sp)
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LOAD x16, 16*REGBYTES(sp)
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LOAD x17, 17*REGBYTES(sp)
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LOAD x18, 18*REGBYTES(sp)
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LOAD x19, 19*REGBYTES(sp)
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LOAD x20, 20*REGBYTES(sp)
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LOAD x21, 21*REGBYTES(sp)
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LOAD x22, 22*REGBYTES(sp)
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LOAD x23, 23*REGBYTES(sp)
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LOAD x24, 24*REGBYTES(sp)
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LOAD x25, 25*REGBYTES(sp)
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#LOAD x26, 26*REGBYTES(sp)
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#LOAD x27, 27*REGBYTES(sp)
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LOAD x28, 28*REGBYTES(sp)
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LOAD x29, 29*REGBYTES(sp)
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LOAD x30, 30*REGBYTES(sp)
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LOAD x31, 31*REGBYTES(sp)
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addi sp, sp, 32*REGBYTES
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2020-03-08 07:09:30 +00:00
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mret
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