2 * File: arch/blackfin/mach-common/cacheinit.S
4 * Author: LG Soft India
7 * Description: cache initialization
10 * Copyright 2004-2006 Analog Devices Inc.
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see the file COPYING, or write
26 * to the Free Software Foundation, Inc.,
27 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 /* This function sets up the data and instruction cache. The
31 * tables like icplb table, dcplb table and Page Descriptor table
32 * are defined in cplbtab.h. You can configure those tables for
33 * your suitable requirements
36 #include <linux/linkage.h>
37 #include <asm/blackfin.h>
41 #if defined(CONFIG_BLKFIN_CACHE)
42 ENTRY(_bfin_icache_init)
44 /* Initialize Instruction CPLBS */
46 I0.L = (ICPLB_ADDR0 & 0xFFFF);
47 I0.H = (ICPLB_ADDR0 >> 16);
49 I1.L = (ICPLB_DATA0 & 0xFFFF);
50 I1.H = (ICPLB_DATA0 >> 16);
55 r1 = -1; /* end point comparison */
56 r3 = 15; /* max counter */
58 /* read entries from table */
71 IF !CC JUMP .Lread_iaddr;
74 /* Enable Instruction Cache */
75 P0.l = (IMEM_CONTROL & 0xFFFF);
76 P0.h = (IMEM_CONTROL >> 16);
81 /* Anomaly 05000125 */
83 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
91 #if defined(CONFIG_BLKFIN_DCACHE)
92 ENTRY(_bfin_dcache_init)
94 /* Initialize Data CPLBS */
96 I0.L = (DCPLB_ADDR0 & 0xFFFF);
97 I0.H = (DCPLB_ADDR0 >> 16);
99 I1.L = (DCPLB_DATA0 & 0xFFFF);
100 I1.H = (DCPLB_DATA0 >> 16);
105 R1 = -1; /* end point comparison */
106 R3 = 15; /* max counter */
108 /* read entries from table */
120 IF !CC JUMP .Lread_daddr;
122 P0.L = (DMEM_CONTROL & 0xFFFF);
123 P0.H = (DMEM_CONTROL >> 16);
129 /* Anomaly 05000125 */
131 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */