drivers/misc/fsl_law.c - filogic/uboot - Gitiles

 /*
  * Copyright 2008-2009 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;

 /* 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_MPC8569) || \
       defined(CONFIG_MPC8641) || defined(CONFIG_MPC8610)
 #define FSL_HW_NUM_LAWS 10
 #elif defined(CONFIG_MPC8536) || defined(CONFIG_MPC8572) || \
       defined(CONFIG_P1011) || defined(CONFIG_P1020) || \
       defined(CONFIG_P2010) || defined(CONFIG_P2020)
 #define FSL_HW_NUM_LAWS 12
 #elif defined(CONFIG_PPC_P4080)
 #define FSL_HW_NUM_LAWS 32
 #else
 #error FSL_HW_NUM_LAWS not defined for this platform
 #endif

 #ifdef CONFIG_FSL_CORENET
 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
 {
 	volatile ccsr_local_t *ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);

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

 	out_be32(&ccm->law[idx].lawar, 0);
 	out_be32(&ccm->law[idx].lawbarh, ((u64)addr >> 32));
 	out_be32(&ccm->law[idx].lawbarl, addr & 0xffffffff);
 	out_be32(&ccm->law[idx].lawar, LAW_EN | ((u32)id << 20) | (u32)sz);

 	/* Read back so that we sync the writes */
 	in_be32(&ccm->law[idx].lawar);
 }

 void disable_law(u8 idx)
 {
 	volatile ccsr_local_t *ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);

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

 	out_be32(&ccm->law[idx].lawar, 0);
 	out_be32(&ccm->law[idx].lawbarh, 0);
 	out_be32(&ccm->law[idx].lawbarl, 0);

 	/* Read back so that we sync the writes */
 	in_be32(&ccm->law[idx].lawar);

 	return;
 }

 static int get_law_entry(u8 i, struct law_entry *e)
 {
 	volatile ccsr_local_t *ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
 	u32 lawar;

 	lawar = in_be32(&ccm->law[i].lawar);

 	if (!(lawar & LAW_EN))
 		return 0;

 	e->addr = ((u64)in_be32(&ccm->law[i].lawbarh) << 32) |
 			in_be32(&ccm->law[i].lawbarl);
 	e->size = lawar & 0x3f;
 	e->trgt_id = (lawar >> 20) & 0xff;

 	return 1;
 }
 #else
 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(lawar, 0);
 	out_be32(lawbar, addr >> 12);
 	out_be32(lawar, LAW_EN | ((u32)id << 20) | (u32)sz);

 	/* Read back so that we sync the writes */
 	in_be32(lawar);
 }

 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);

 	/* Read back so that we sync the writes */
 	in_be32(lawar);

 	return;
 }

 static int get_law_entry(u8 i, struct law_entry *e)
 {
 	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
 	volatile u32 *lawbar = base + 8 * i;
 	volatile u32 *lawar = base + 8 * i + 2;
 	u32 temp;

 	temp = in_be32(lawar);

 	if (!(temp & LAW_EN))
 		return 0;

 	e->addr = (u64)in_be32(lawbar) << 12;
 	e->size = temp & 0x3f;
 	e->trgt_id = (temp >> 20) & 0xff;

 	return 1;
 }
 #endif

 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;
 }

 #ifndef CONFIG_NAND_SPL
 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;
 }

 struct law_entry find_law(phys_addr_t addr)
 {
 	struct law_entry entry;
 	int i;

 	entry.index = -1;
 	entry.addr = 0;
 	entry.size = 0;
 	entry.trgt_id = 0;

 	for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
 		u64 upper;

 		if (!get_law_entry(i, &entry))
 			continue;

 		upper = entry.addr + (2ull << entry.size);
 		if ((addr >= entry.addr) && (addr < upper)) {
 			entry.index = i;
 			break;
 		}
 	}

 	return entry;
 }

 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;

 	/* recalculate size based on what was actually covered by the law */
 	law_sz = 1ull << __ilog2_u64(law_sz);

 	/* 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;
 }
 #endif

 void init_laws(void)
 {
 	int i;

 #if FSL_HW_NUM_LAWS < 32
 	gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
 #elif FSL_HW_NUM_LAWS == 32
 	gd->used_laws = 0;
 #else
 #error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
 #endif

 	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 ;
 }
	/*
	* Copyright 2008-2009 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;

	/* 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_MPC8569) \|\| \
	defined(CONFIG_MPC8641) \|\| defined(CONFIG_MPC8610)
	#define FSL_HW_NUM_LAWS 10
	#elif defined(CONFIG_MPC8536) \|\| defined(CONFIG_MPC8572) \|\| \
	defined(CONFIG_P1011) \|\| defined(CONFIG_P1020) \|\| \
	defined(CONFIG_P2010) \|\| defined(CONFIG_P2020)
	#define FSL_HW_NUM_LAWS 12
	#elif defined(CONFIG_PPC_P4080)
	#define FSL_HW_NUM_LAWS 32
	#else
	#error FSL_HW_NUM_LAWS not defined for this platform
	#endif

	#ifdef CONFIG_FSL_CORENET
	void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
	{
	volatile ccsr_local_t ccm = (void )(CONFIG_SYS_FSL_CORENET_CCM_ADDR);

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

	out_be32(&ccm->law[idx].lawar, 0);
	out_be32(&ccm->law[idx].lawbarh, ((u64)addr >> 32));
	out_be32(&ccm->law[idx].lawbarl, addr & 0xffffffff);
	out_be32(&ccm->law[idx].lawar, LAW_EN \| ((u32)id << 20) \| (u32)sz);

	/* Read back so that we sync the writes */
	in_be32(&ccm->law[idx].lawar);
	}

	void disable_law(u8 idx)
	{
	volatile ccsr_local_t ccm = (void )(CONFIG_SYS_FSL_CORENET_CCM_ADDR);

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

	out_be32(&ccm->law[idx].lawar, 0);
	out_be32(&ccm->law[idx].lawbarh, 0);
	out_be32(&ccm->law[idx].lawbarl, 0);

	/* Read back so that we sync the writes */
	in_be32(&ccm->law[idx].lawar);

	return;
	}

	static int get_law_entry(u8 i, struct law_entry *e)
	{
	volatile ccsr_local_t ccm = (void )(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
	u32 lawar;

	lawar = in_be32(&ccm->law[i].lawar);

	if (!(lawar & LAW_EN))
	return 0;

	e->addr = ((u64)in_be32(&ccm->law[i].lawbarh) << 32) \|
	in_be32(&ccm->law[i].lawbarl);
	e->size = lawar & 0x3f;
	e->trgt_id = (lawar >> 20) & 0xff;

	return 1;
	}
	#else
	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(lawar, 0);
	out_be32(lawbar, addr >> 12);
	out_be32(lawar, LAW_EN \| ((u32)id << 20) \| (u32)sz);

	/* Read back so that we sync the writes */
	in_be32(lawar);
	}

	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);

	/* Read back so that we sync the writes */
	in_be32(lawar);

	return;
	}

	static int get_law_entry(u8 i, struct law_entry *e)
	{
	volatile u32 base = (volatile u32 )(CONFIG_SYS_IMMR + 0xc08);
	volatile u32 lawbar = base + 8 i;
	volatile u32 lawar = base + 8 i + 2;
	u32 temp;

	temp = in_be32(lawar);

	if (!(temp & LAW_EN))
	return 0;

	e->addr = (u64)in_be32(lawbar) << 12;
	e->size = temp & 0x3f;
	e->trgt_id = (temp >> 20) & 0xff;

	return 1;
	}
	#endif

	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;
	}

	#ifndef CONFIG_NAND_SPL
	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;
	}

	struct law_entry find_law(phys_addr_t addr)
	{
	struct law_entry entry;
	int i;

	entry.index = -1;
	entry.addr = 0;
	entry.size = 0;
	entry.trgt_id = 0;

	for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
	u64 upper;

	if (!get_law_entry(i, &entry))
	continue;

	upper = entry.addr + (2ull << entry.size);
	if ((addr >= entry.addr) && (addr < upper)) {
	entry.index = i;
	break;
	}
	}

	return entry;
	}

	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;

	/* recalculate size based on what was actually covered by the law */
	law_sz = 1ull << __ilog2_u64(law_sz);

	/* 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;
	}
	#endif

	void init_laws(void)
	{
	int i;

	#if FSL_HW_NUM_LAWS < 32
	gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
	#elif FSL_HW_NUM_LAWS == 32
	gd->used_laws = 0;
	#else
	#error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
	#endif

	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 ;
	}