2 * (C) Copyright 2004 Texas Insturments
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * udelay() is CPU specific code
30 /* See also ARM Ref. Man. */
31 #define C1_MMU (1<<0) /* mmu off/on */
32 #define C1_ALIGN (1<<1) /* alignment faults off/on */
33 #define C1_DC (1<<2) /* dcache off/on */
34 #define C1_WB (1<<3) /* merging write buffer on/off */
35 #define C1_BIG_ENDIAN (1<<7) /* big endian off/on */
36 #define C1_SYS_PROT (1<<8) /* system protection */
37 #define C1_ROM_PROT (1<<9) /* ROM protection */
38 #define C1_IC (1<<12) /* icache off/on */
39 #define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */
40 #define RESERVED_1 (0xf << 3) /* must be 111b for R/W */
46 /* turn off I/D-cache */
47 asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
48 i &= ~(C1_DC | C1_IC);
49 asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
53 asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); // invalidate both caches and flush btb
54 asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); // mem barrier to sync things