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https://opencores.org/ocsvn/eco32/eco32/trunk
Subversion Repositories eco32
[/] [eco32/] [tags/] [eco32-0.26/] [stdalone/] [mkpart/] [mkmboot/] [stage2/] [c0.s] - Rev 18
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; ; c0.s -- startup code and begin-of-segment labels ; .import main .import _ecode .import _edata .import _ebss .export _bcode .export _bdata .export _bbss .import bootDisk .import startSector .import numSectors .code _bcode: start: add $10,$0,_bdata ; copy data segment add $8,$0,_edata sub $9,$8,$10 add $9,$9,_ecode j cpytest cpyloop: ldw $11,$9,0 stw $11,$8,0 cpytest: sub $8,$8,4 sub $9,$9,4 bgeu $8,$10,cpyloop add $8,$0,_bbss ; clear bss segment add $9,$0,_ebss j clrtest clrloop: stw $0,$8,0 add $8,$8,4 clrtest: bltu $8,$9,clrloop add $29,$0,0xC0100000 ; setup stack stw $16,$0,bootDisk ; make arguments available stw $17,$0,startSector stw $18,$0,numSectors jal main ; call 'main' function ldw $16,$0,bootDisk ; setup arguments for next stage ldw $17,$0,startSector ldw $18,$0,numSectors add $31,$0,0xC0000000 ; jump to loaded program jr $31 .data _bdata: .bss _bbss:
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