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97 lines
1.6 KiB
97 lines
1.6 KiB
# .global crtStart
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# .global main
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# .global irqCallback
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# crtStart:
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# j crtInit
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# nop
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# nop
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# nop
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# nop
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# nop
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# nop
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# nop
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# .global trap_entry
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# trap_entry:
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# sw x1, - 1*4(sp)
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# sw x5, - 2*4(sp)
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# sw x6, - 3*4(sp)
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# sw x7, - 4*4(sp)
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# sw x10, - 5*4(sp)
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# sw x11, - 6*4(sp)
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# sw x12, - 7*4(sp)
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# sw x13, - 8*4(sp)
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# sw x14, - 9*4(sp)
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# sw x15, -10*4(sp)
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# sw x16, -11*4(sp)
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# sw x17, -12*4(sp)
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# sw x28, -13*4(sp)
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# sw x29, -14*4(sp)
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# sw x30, -15*4(sp)
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# sw x31, -16*4(sp)
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# addi sp,sp,-16*4
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# call irqCallback
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# lw x1 , 15*4(sp)
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# lw x5, 14*4(sp)
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# lw x6, 13*4(sp)
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# lw x7, 12*4(sp)
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# lw x10, 11*4(sp)
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# lw x11, 10*4(sp)
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# lw x12, 9*4(sp)
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# lw x13, 8*4(sp)
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# lw x14, 7*4(sp)
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# lw x15, 6*4(sp)
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# lw x16, 5*4(sp)
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# lw x17, 4*4(sp)
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# lw x28, 3*4(sp)
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# lw x29, 2*4(sp)
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# lw x30, 1*4(sp)
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# lw x31, 0*4(sp)
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# addi sp,sp,16*4
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# mret
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# .text
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# crtInit:
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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, _stack_start
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# bss_init:
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# la a0, _bss_start
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# la a1, _bss_end
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# bss_loop:
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# beq a0,a1,bss_done
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# sw zero,0(a0)
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# add a0,a0,4
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# j bss_loop
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# bss_done:
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# ctors_init:
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# la a0, _ctors_start
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# addi sp,sp,-4
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# ctors_loop:
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# la a1, _ctors_end
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# beq a0,a1,ctors_done
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# lw a3,0(a0)
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# add a0,a0,4
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# sw a0,0(sp)
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# jalr a3
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# lw a0,0(sp)
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# j ctors_loop
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# ctors_done:
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# addi sp,sp,4
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# li a0, 0x880 //880 enable timer + external interrupts
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# csrw mie,a0
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# li a0, 0x1808 //1808 enable interrupts
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# csrw mstatus,a0
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# call main
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# infinitLoop:
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# j infinitLoop
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