arch/blackfin/include/asm/cplbinit.h

/*
 * File:         include/asm-blackfin/cplbinit.h
 * Based on:
 * Author:
 *
 * Created:
 * Description:
 *
 * 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
 */

#ifndef __ASM_CPLBINIT_H__
#define __ASM_CPLBINIT_H__

#include <asm/blackfin.h>
#include <asm/cplb.h>

#ifdef CONFIG_MPU

#include <asm/cplb-mpu.h>

#else

#define INITIAL_T 0x1
#define SWITCH_T  0x2
#define I_CPLB    0x4
#define D_CPLB    0x8

#define IN_KERNEL 1

enum
{ZERO_P, L1I_MEM, L1D_MEM, SDRAM_KERN , SDRAM_RAM_MTD, SDRAM_DMAZ, RES_MEM, ASYNC_MEM, L2_MEM};

struct cplb_desc {
	u32 start; /* start address */
	u32 end; /* end address */
	u32 psize; /* prefered size if any otherwise 1MB or 4MB*/
	u16 attr;/* attributes */
	u16 i_conf;/* I-CPLB DATA */
	u16 d_conf;/* D-CPLB DATA */
	u16 valid;/* valid */
	const s8 name[30];/* name */
};

struct cplb_tab {
  u_long *tab;
	u16 pos;
	u16 size;
};

extern u_long icplb_table[];
extern u_long dcplb_table[];

/* Till here we are discussing about the static memory management model.
 * However, the operating envoronments commonly define more CPLB
 * descriptors to cover the entire addressable memory than will fit into
 * the available on-chip 16 CPLB MMRs. When this happens, the below table
 * will be used which will hold all the potentially required CPLB descriptors
 *
 * This is how Page descriptor Table is implemented in uClinux/Blackfin.
 */

extern u_long ipdt_table[];
extern u_long dpdt_table[];
#ifdef CONFIG_CPLB_INFO
extern u_long ipdt_swapcount_table[];
extern u_long dpdt_swapcount_table[];
#endif

#endif /* CONFIG_MPU */

extern unsigned long reserved_mem_dcache_on;
extern unsigned long reserved_mem_icache_on;

extern void generate_cplb_tables(void);

static inline int bfin_addr_dcachable(unsigned long addr)
{
#ifdef CONFIG_BFIN_DCACHE
	if (addr < (_ramend - DMA_UNCACHED_REGION))
		return 1;
#endif

	if (reserved_mem_dcache_on &&
		addr >= _ramend && addr < physical_mem_end)
		return 1;

	return 0;
}

#endif