source: SVN/rincon/u-boot/cpu/mpc824x/drivers/epic/epicutil.S @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 1.2 KB
Line 
1/**************************************
2 *
3 * copyright @ Motorola, 1999
4 *
5 *
6 * This file contains two commonly used
7 * lower level utility routines.
8 *
9 * The utility routines are also in other
10 * Kahlua device driver libraries. The
11 * need to be linked in only once.
12 **************************************/
13
14#include <ppc_asm.tmpl>
15#include <ppc_defs.h>
16
17/**********************************************************
18 * function: load_runtime_reg
19 *
20 * input:  r3 - value of eumbbar
21 *         r4 - register offset in embedded utility space
22 *
23 * output: r3 - register content
24 **********************************************************/
25      .text
26      .align 2
27      .global load_runtime_reg
28
29load_runtime_reg:
30
31                  xor r5,r5,r5
32          or  r5,r5,r3       /* save eumbbar */
33
34              lwbrx     r3,r4,r5
35              sync
36
37              bclr 20, 0
38
39/****************************************************************
40 * function: store_runtime_reg
41 *
42 * input: r3 - value of eumbbar
43 *        r4 - register offset in embedded utility space
44 *        r5 - new value to be stored
45 *
46 ****************************************************************/
47           .text
48           .align 2
49           .global store_runtime_reg
50store_runtime_reg:
51
52                  xor r0,r0,r0
53
54              stwbrx r5,  r4, r3
55              sync
56
57                  bclr   20,0
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