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asm_utils.S @ c499856

4.115

Last change on this file since c499856 was 9b4422a2, checked in by Joel Sherrill <joel.sherrill@…>, on 05/03/12 at 15:09:24

Remove All CVS Id Strings Possible Using a Script

Script does what is expected and tries to do it as
smartly as possible.

+ remove occurrences of two blank comment lines

next to each other after Id string line removed.

+ remove entire comment blocks which only exited to

contain CVS Ids

+ If the processing left a blank line at the top of

a file, it was removed.

File size: 1.1 KB

Line
1	/*
2	* asm_utils.s
3	*
4	* Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
5	*
6	* This file contains the low-level support for moving exception
7	* exception code to appropriate location.
8	*
9	*/
10
11	#include <rtems/asm.h>
12	#include <rtems/score/cpu.h>
13
14	.globl codemove
15	codemove:
16	.type codemove,@function
17	/* r3 dest, r4 src, r5 length in bytes, r6 cachelinesize */
18	cmplw cr1,r3,r4
19	addi r0,r5,3
20	srwi. r0,r0,2
21	beq cr1,4f /* In place copy is not necessary */
22	beq 7f /* Protect against 0 count */
23	mtctr r0
24	bge cr1,2f
25
26	la r8,-4(r4)
27	la r7,-4(r3)
28	1: lwzu r0,4(r8)
29	stwu r0,4(r7)
30	bdnz 1b
31	b 4f
32
33	2: slwi r0,r0,2
34	add r8,r4,r0
35	add r7,r3,r0
36	3: lwzu r0,-4(r8)
37	stwu r0,-4(r7)
38	bdnz 3b
39
40	/* Now flush the cache: note that we must start from a cache aligned
41	* address. Otherwise we might miss one cache line.
42	*/
43	4: cmpwi r6,0
44	add r5,r3,r5
45	beq 7f /* Always flush prefetch queue in any case */
46	subi r0,r6,1
47	andc r3,r3,r0
48	mr r4,r3
49	5: cmplw r4,r5
50	dcbst 0,r4
51	add r4,r4,r6
52	blt 5b
53	sync /* Wait for all dcbst to complete on bus */
54	mr r4,r3
55	6: cmplw r4,r5
56	icbi 0,r4
57	add r4,r4,r6
58	blt 6b
59	7: sync /* Wait for all icbi to complete on bus */
60	isync
61	blr

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