URL
https://opencores.org/ocsvn/eco32/eco32/trunk
Subversion Repositories eco32
[/] [eco32/] [trunk/] [fpga/] [tests/] [test_054/] [copy/] [copy.s] - Rev 314
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; ; copy.s -- copy a program from ROM to RAM before executing it ; .set dst,0xC0000000 ; destination is start of RAM .import size ; number of bytes to be copied .set PSW,0 ; reg # of PSW .nosyn 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 $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 ldhi $8,src add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 or $8,$8,src add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 ldhi $9,dst add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $10,$9,size add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 loop: ldw $11,$8,0 ; copy word add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 stw $11,$9,0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $8,$8,4 ; bump pointers add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $9,$9,4 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 bltu $9,$10,loop ; more? add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 ldhi $8,dst ; start execution add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 jr $8 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 add $0,$0,$0 ; the program to be copied follows immediately src:
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