2 * Copyright 2008 Freescale Semiconductor, Inc.
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 #include <asm/fsl_law.h>
30 DECLARE_GLOBAL_DATA_PTR;
32 #define LAWAR_EN 0x80000000
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
41 #elif defined(CONFIG_MPC8572)
42 #define FSL_HW_NUM_LAWS 12
44 #error FSL_HW_NUM_LAWS not defined for this platform
47 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
49 volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
50 volatile u32 *lawbar = base + 8 * idx;
51 volatile u32 *lawar = base + 8 * idx + 2;
53 gd->used_laws |= (1 << idx);
55 out_be32(lawbar, addr >> 12);
56 out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
61 int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
63 u32 idx = ffz(gd->used_laws);
65 if (idx >= FSL_HW_NUM_LAWS)
68 set_law(idx, addr, sz, id);
73 int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
77 /* we have no LAWs free */
78 if (gd->used_laws == -1)
81 /* grab the last free law */
82 idx = __ilog2(~(gd->used_laws));
84 if (idx >= FSL_HW_NUM_LAWS)
87 set_law(idx, addr, sz, id);
92 void disable_law(u8 idx)
94 volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
95 volatile u32 *lawbar = base + 8 * idx;
96 volatile u32 *lawar = base + 8 * idx + 2;
98 gd->used_laws &= ~(1 << idx);
106 void print_laws(void)
108 volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
109 volatile u32 *lawbar = base;
110 volatile u32 *lawar = base + 2;
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));
128 gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
130 for (i = 0; i < num_law_entries; i++) {
131 if (law_table[i].index == -1)
132 set_next_law(law_table[i].addr, law_table[i].size,
133 law_table[i].trgt_id);
135 set_law(law_table[i].index, law_table[i].addr,
136 law_table[i].size, law_table[i].trgt_id);