[people/ms/u-boot.git] / drivers / misc / fsl_law.c

/*
 * Copyright 2008 Freescale Semiconductor, Inc.
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/fsl_law.h>
#include <asm/io.h>

DECLARE_GLOBAL_DATA_PTR;

#define LAWAR_EN	0x80000000
/* number of LAWs in the hw implementation */
#if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
    defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555)
#define FSL_HW_NUM_LAWS 8
#elif defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544) || \
      defined(CONFIG_MPC8568) || \
      defined(CONFIG_MPC8641) || defined(CONFIG_MPC8610)
#define FSL_HW_NUM_LAWS 10
#elif defined(CONFIG_MPC8536) || defined(CONFIG_MPC8572)
#define FSL_HW_NUM_LAWS 12
#else
#error FSL_HW_NUM_LAWS not defined for this platform
#endif

void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
{
	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
	volatile u32 *lawbar = base + 8 * idx;
	volatile u32 *lawar = base + 8 * idx + 2;

	gd->used_laws |= (1 << idx);

	out_be32(lawbar, addr >> 12);
	out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);

	return ;
}

int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
{
	u32 idx = ffz(gd->used_laws);

	if (idx >= FSL_HW_NUM_LAWS)
		return -1;

	set_law(idx, addr, sz, id);

	return idx;
}

int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
{
	u32 idx;

	/* we have no LAWs free */
	if (gd->used_laws == -1)
		return -1;

	/* grab the last free law */
	idx = __ilog2(~(gd->used_laws));

	if (idx >= FSL_HW_NUM_LAWS)
		return -1;

	set_law(idx, addr, sz, id);

	return idx;
}

void disable_law(u8 idx)
{
	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
	volatile u32 *lawbar = base + 8 * idx;
	volatile u32 *lawar = base + 8 * idx + 2;

	gd->used_laws &= ~(1 << idx);

	out_be32(lawar, 0);
	out_be32(lawbar, 0);

	return;
}

void print_laws(void)
{
	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
	volatile u32 *lawbar = base;
	volatile u32 *lawar = base + 2;
	int i;

	printf("\nLocal Access Window Configuration\n");
	for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
		printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
		       i, in_be32(lawbar), i, in_be32(lawar));
		lawbar += 8;
		lawar += 8;
	}

	return;
}

/* use up to 2 LAWs for DDR, used the last available LAWs */
int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
{
	u64 start_align, law_sz;
	int law_sz_enc;

	if (start == 0)
		start_align = 1ull << (LAW_SIZE_32G + 1);
	else
		start_align = 1ull << (ffs64(start) - 1);
	law_sz = min(start_align, sz);
	law_sz_enc = __ilog2_u64(law_sz) - 1;

	if (set_last_law(start, law_sz_enc, id) < 0)
		return -1;

	/* do we still have anything to map */
	sz = sz - law_sz;
	if (sz) {
		start += law_sz;

		start_align = 1ull << (ffs64(start) - 1);
		law_sz = min(start_align, sz);
		law_sz_enc = __ilog2_u64(law_sz) - 1;

		if (set_last_law(start, law_sz_enc, id) < 0)
			return -1;
	} else {
		return 0;
	}

	/* do we still have anything to map */
	sz = sz - law_sz;
	if (sz)
		return 1;

	return 0;
}

void init_laws(void)
{
	int i;

	gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);

	for (i = 0; i < num_law_entries; i++) {
		if (law_table[i].index == -1)
			set_next_law(law_table[i].addr, law_table[i].size,
					law_table[i].trgt_id);
		else
			set_law(law_table[i].index, law_table[i].addr,
				law_table[i].size, law_table[i].trgt_id);
	}

	return ;
}
Commit	Line	Data
83d40dfd KG	1	/*
	2	* Copyright 2008 Freescale Semiconductor, Inc.
	3	*
	4	* (C) Copyright 2000
	5	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	6	*
	7	* See file CREDITS for list of people who contributed to this
	8	* project.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License as
	12	* published by the Free Software Foundation; either version 2 of
	13	* the License, or (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	23	* MA 02111-1307 USA
	24	*/
	25
	26	#include <common.h>
	27	#include <asm/fsl_law.h>
	28	#include <asm/io.h>
	29
f060054d KG	30	DECLARE_GLOBAL_DATA_PTR;
f060054d KG	31
83d40dfd	32	#define LAWAR_EN 0x80000000
f060054d KG	33	/* number of LAWs in the hw implementation */
	34	#if defined(CONFIG_MPC8540) \|\| defined(CONFIG_MPC8541) \|\| \
	35	defined(CONFIG_MPC8560) \|\| defined(CONFIG_MPC8555)
	36	#define FSL_HW_NUM_LAWS 8
	37	#elif defined(CONFIG_MPC8548) \|\| defined(CONFIG_MPC8544) \|\| \
	38	defined(CONFIG_MPC8568) \|\| \
	39	defined(CONFIG_MPC8641) \|\| defined(CONFIG_MPC8610)
	40	#define FSL_HW_NUM_LAWS 10
ef50d6c0	41	#elif defined(CONFIG_MPC8536) \|\| defined(CONFIG_MPC8572)
f060054d KG	42	#define FSL_HW_NUM_LAWS 12
	43	#else
	44	#error FSL_HW_NUM_LAWS not defined for this platform
	45	#endif
83d40dfd KG	46
	47	void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
	48	{
6d0f6bcf	49	volatile u32 base = (volatile u32 )(CONFIG_SYS_IMMR + 0xc08);
83d40dfd KG	50	volatile u32 lawbar = base + 8 idx;
	51	volatile u32 lawar = base + 8 idx + 2;
	52
f060054d KG	53	gd->used_laws \|= (1 << idx);
f060054d KG	54
83d40dfd KG	55	out_be32(lawbar, addr >> 12);
	56	out_be32(lawar, LAWAR_EN \| ((u32)id << 20) \| (u32)sz);
	57
	58	return ;
	59	}
	60
f060054d KG	61	int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
	62	{
	63	u32 idx = ffz(gd->used_laws);
	64
	65	if (idx >= FSL_HW_NUM_LAWS)
	66	return -1;
	67
	68	set_law(idx, addr, sz, id);
ba04f701 KG	69
	70	return idx;
	71	}
	72
	73	int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
	74	{
	75	u32 idx;
	76
	77	/* we have no LAWs free */
	78	if (gd->used_laws == -1)
	79	return -1;
	80
	81	/* grab the last free law */
	82	idx = __ilog2(~(gd->used_laws));
	83
	84	if (idx >= FSL_HW_NUM_LAWS)
	85	return -1;
	86
	87	set_law(idx, addr, sz, id);
f060054d KG	88
	89	return idx;
	90	}
	91
83d40dfd KG	92	void disable_law(u8 idx)
83d40dfd KG	93	{
6d0f6bcf	94	volatile u32 base = (volatile u32 )(CONFIG_SYS_IMMR + 0xc08);
83d40dfd KG	95	volatile u32 lawbar = base + 8 idx;
	96	volatile u32 lawar = base + 8 idx + 2;
	97
f060054d KG	98	gd->used_laws &= ~(1 << idx);
f060054d KG	99
83d40dfd KG	100	out_be32(lawar, 0);
	101	out_be32(lawbar, 0);
	102
	103	return;
	104	}
	105
ddcebcb6 BB	106	void print_laws(void)
ddcebcb6 BB	107	{
6d0f6bcf	108	volatile u32 base = (volatile u32 )(CONFIG_SYS_IMMR + 0xc08);
ddcebcb6 BB	109	volatile u32 *lawbar = base;
	110	volatile u32 *lawar = base + 2;
	111	int i;
	112
	113	printf("\nLocal Access Window Configuration\n");
	114	for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
	115	printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
	116	i, in_be32(lawbar), i, in_be32(lawar));
	117	lawbar += 8;
	118	lawar += 8;
	119	}
	120
	121	return;
	122	}
	123
f784e32b KG	124	/* use up to 2 LAWs for DDR, used the last available LAWs */
	125	int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
	126	{
	127	u64 start_align, law_sz;
	128	int law_sz_enc;
	129
	130	if (start == 0)
	131	start_align = 1ull << (LAW_SIZE_32G + 1);
	132	else
	133	start_align = 1ull << (ffs64(start) - 1);
	134	law_sz = min(start_align, sz);
	135	law_sz_enc = __ilog2_u64(law_sz) - 1;
	136
	137	if (set_last_law(start, law_sz_enc, id) < 0)
	138	return -1;
	139
	140	/* do we still have anything to map */
	141	sz = sz - law_sz;
	142	if (sz) {
	143	start += law_sz;
	144
	145	start_align = 1ull << (ffs64(start) - 1);
	146	law_sz = min(start_align, sz);
	147	law_sz_enc = __ilog2_u64(law_sz) - 1;
	148
	149	if (set_last_law(start, law_sz_enc, id) < 0)
	150	return -1;
	151	} else {
	152	return 0;
	153	}
	154
	155	/* do we still have anything to map */
	156	sz = sz - law_sz;
	157	if (sz)
	158	return 1;
	159
	160	return 0;
	161	}
	162
83d40dfd KG	163	void init_laws(void)
	164	{
	165	int i;
83d40dfd	166
f060054d	167	gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
83d40dfd	168
f060054d KG	169	for (i = 0; i < num_law_entries; i++) {
	170	if (law_table[i].index == -1)
	171	set_next_law(law_table[i].addr, law_table[i].size,
	172	law_table[i].trgt_id);
	173	else
	174	set_law(law_table[i].index, law_table[i].addr,
	175	law_table[i].size, law_table[i].trgt_id);
83d40dfd KG	176	}
	177
	178	return ;
	179	}