blob: 417ba621a22148e151e3acba1892f3046f47c85f [file] [log] [blame]
wdenkfe8c2802002-11-03 00:38:21 +00001/*
2 * Copyright (C) 2000 Murray Jensen <Murray.Jensen@cmst.csiro.au>
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22
23#include <config.h>
24#include <command.h>
Stefan Roeseb36df562010-09-09 19:18:00 +020025#include <asm/ppc4xx.h>
wdenkfe8c2802002-11-03 00:38:21 +000026#include <version.h>
27
28#define CONFIG_405GP 1 /* needed for Linux kernel header files */
29#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
30
31#include <ppc_asm.tmpl>
32#include <ppc_defs.h>
33
34#include <asm/cache.h>
35#include <asm/mmu.h>
36
Jon Loeliger3a1ed1e2007-07-09 18:57:22 -050037#if defined(CONFIG_CMD_KGDB)
wdenkfe8c2802002-11-03 00:38:21 +000038 /*
39 * cache flushing routines for kgdb
40 */
41
42 .globl kgdb_flush_cache_all
43kgdb_flush_cache_all:
44 /* icache */
45 iccci r0,r0 /* iccci invalidates the entire I cache */
46 /* dcache */
47 addi r6,0,0x0000 /* clear GPR 6 */
Wolfgang Denk53677ef2008-05-20 16:00:29 +020048 addi r7,r0, 128 /* do loop for # of dcache lines */
wdenkfe8c2802002-11-03 00:38:21 +000049 /* NOTE: dccci invalidates both */
wdenk8bde7f72003-06-27 21:31:46 +000050 mtctr r7 /* ways in the D cache */
wdenkfe8c2802002-11-03 00:38:21 +000051..dcloop:
wdenk8bde7f72003-06-27 21:31:46 +000052 dccci 0,r6 /* invalidate line */
53 addi r6,r6, 32 /* bump to next line */
54 bdnz ..dcloop
wdenkfe8c2802002-11-03 00:38:21 +000055 blr
56
57 .globl kgdb_flush_cache_range
58kgdb_flush_cache_range:
Stefan Roese9b94ac62007-10-31 17:55:58 +010059 li r5,L1_CACHE_BYTES-1
wdenkfe8c2802002-11-03 00:38:21 +000060 andc r3,r3,r5
61 subf r4,r3,r4
62 add r4,r4,r5
Stefan Roese9b94ac62007-10-31 17:55:58 +010063 srwi. r4,r4,L1_CACHE_SHIFT
wdenkfe8c2802002-11-03 00:38:21 +000064 beqlr
65 mtctr r4
66 mr r6,r3
671: dcbst 0,r3
Stefan Roese9b94ac62007-10-31 17:55:58 +010068 addi r3,r3,L1_CACHE_BYTES
wdenkfe8c2802002-11-03 00:38:21 +000069 bdnz 1b
70 sync /* wait for dcbst's to get to ram */
71 mtctr r4
722: icbi 0,r6
Stefan Roese9b94ac62007-10-31 17:55:58 +010073 addi r6,r6,L1_CACHE_BYTES
wdenkfe8c2802002-11-03 00:38:21 +000074 bdnz 2b
75 SYNC
76 blr
77
Jon Loeliger068b60a2007-07-10 10:27:39 -050078#endif