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[/] [eco32/] [trunk/] [monitor/] [monitor/] [copy/] [copy.s] - Blame information for rev 251

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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:

Line No.	Rev	Author	Line
1	62	hellwig	`;`
2			`; copy.s -- copy a program from ROM to RAM before executing it`
3			`;`
4
5			`.set dst,0xC0000000 ; destination is start of RAM`
6	200	hellwig	`.set len,0x0000FF00 ; number of bytes to be copied`
7	62	hellwig
8			`.set PSW,0 ; reg # of PSW`
9
10			`reset:`
11			`j start`
12
13			`interrupt:`
14			`j interrupt ; we better have no interrupts`
15
16			`userMiss:`
17			`j userMiss ; and no user TLB misses`
18
19			`start:`
20			`mvts $0,PSW ; disable interrupts and user mode`
21			`add $8,$0,src`
22			`add $9,$0,dst`
23			`add $10,$9,len`
24			`loop:`
25			`ldw $11,$8,0 ; copy word`
26			`stw $11,$9,0`
27			`add $8,$8,4 ; bump pointers`
28			`add $9,$9,4`
29			`bltu $9,$10,loop ; more?`
30			`add $8,$0,dst ; start execution`
31			`jr $8`
32
33			`; the program to be copied follows immediately`
34			`src:`

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[/] [eco32/] [trunk/] [monitor/] [monitor/] [copy/] [copy.s] - Blame information for rev 251