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/*
* File: arch/blackfin/mach-common/cacheinit.S
* Based on:
* Author: LG Soft India
*
* Created: ?
* Description: cache initialization
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* This function sets up the data and instruction cache. The
* tables like icplb table, dcplb table and Page Descriptor table
* are defined in cplbtab.h. You can configure those tables for
* your suitable requirements
*/
#include <linux/linkage.h>
#include <asm/blackfin.h>
.text
#if defined(CONFIG_BLKFIN_CACHE)
ENTRY(_bfin_icache_init)
/* Initialize Instruction CPLBS */
I0.L = (ICPLB_ADDR0 & 0xFFFF);
I0.H = (ICPLB_ADDR0 >> 16);
I1.L = (ICPLB_DATA0 & 0xFFFF);
I1.H = (ICPLB_DATA0 >> 16);
I2.L = _icplb_table;
I2.H = _icplb_table;
r1 = -1; /* end point comparison */
r3 = 15; /* max counter */
/* read entries from table */
.Lread_iaddr:
R0 = [I2++];
CC = R0 == R1;
IF CC JUMP .Lidone;
[I0++] = R0;
.Lread_idata:
R2 = [I2++];
[I1++] = R2;
R3 = R3 + R1;
CC = R3 == R1;
IF !CC JUMP .Lread_iaddr;
.Lidone:
/* Enable Instruction Cache */
P0.l = (IMEM_CONTROL & 0xFFFF);
P0.h = (IMEM_CONTROL >> 16);
R1 = [P0];
R0 = (IMC | ENICPLB);
R0 = R0 | R1;
/* Anomaly 05000125 */
CLI R2;
SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
.align 8;
[P0] = R0;
SSYNC;
STI R2;
RTS;
#endif
#if defined(CONFIG_BLKFIN_DCACHE)
ENTRY(_bfin_dcache_init)
/* Initialize Data CPLBS */
I0.L = (DCPLB_ADDR0 & 0xFFFF);
I0.H = (DCPLB_ADDR0 >> 16);
I1.L = (DCPLB_DATA0 & 0xFFFF);
I1.H = (DCPLB_DATA0 >> 16);
I2.L = _dcplb_table;
I2.H = _dcplb_table;
R1 = -1; /* end point comparison */
R3 = 15; /* max counter */
/* read entries from table */
.Lread_daddr:
R0 = [I2++];
cc = R0 == R1;
IF CC JUMP .Lddone;
[I0++] = R0;
.Lread_ddata:
R2 = [I2++];
[I1++] = R2;
R3 = R3 + R1;
CC = R3 == R1;
IF !CC JUMP .Lread_daddr;
.Lddone:
P0.L = (DMEM_CONTROL & 0xFFFF);
P0.H = (DMEM_CONTROL >> 16);
R1 = [P0];
R0 = DMEM_CNTR;
R0 = R0 | R1;
/* Anomaly 05000125 */
CLI R2;
SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
.align 8;
[P0] = R0;
SSYNC;
STI R2;
RTS;
#endif
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