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/*
* 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_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
#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(lawar, 0);
out_be32(lawbar, addr >> 12);
out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
/* Read back so that we sync the writes */
in_be32(lawar);
}
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;
/* 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;
}
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 ;
}
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