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[/] [eco32/] [trunk/] [fpga/] [tests/] [test_101/] [copy/] [copy.s] - Blame information for rev 314

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Line No. Rev Author Line
1 295 hellwig
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; copy.s -- copy a program from ROM to RAM before executing it
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;
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        .set    dst,0xC0000000          ; destination is start of RAM
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        .import size                    ; number of bytes to be copied
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        .set    PSW,0                    ; reg # of PSW
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reset:
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        j       start
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interrupt:
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        j       interrupt               ; we better have no interrupts
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userMiss:
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        j       userMiss                ; and no user TLB misses
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start:
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        mvts    $0,PSW                   ; disable interrupts and user mode
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        add     $8,$0,src
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        add     $9,$0,dst
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        add     $10,$9,size
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loop:
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        ldw     $11,$8,0         ; copy word
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        stw     $11,$9,0
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        add     $8,$8,4                 ; bump pointers
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        add     $9,$9,4
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        bltu    $9,$10,loop             ; more?
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        add     $8,$0,dst                ; start execution
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        jr      $8
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        ; the program to be copied follows immediately
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src:

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