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https://opencores.org/ocsvn/eco32/eco32/trunk
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[/] [eco32/] [trunk/] [monitor/] [monitor/] [copy/] [copy.s] - Rev 299
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; ; copy.s -- copy a program from ROM to RAM before executing it ; .set dst,0xC0000000 ; destination is start of RAM .set len,0x0000FF00 ; number of bytes to be copied .set PSW,0 ; reg # of PSW reset: j start interrupt: j interrupt ; we better have no interrupts userMiss: j userMiss ; and no user TLB misses start: mvts $0,PSW ; disable interrupts and user mode add $8,$0,src add $9,$0,dst add $10,$9,len loop: ldw $11,$8,0 ; copy word stw $11,$9,0 add $8,$8,4 ; bump pointers add $9,$9,4 bltu $9,$10,loop ; more? add $8,$0,dst ; start execution jr $8 ; the program to be copied follows immediately src:
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