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) || defined(CONFIG_MPC8569) || \
39 defined(CONFIG_MPC8641) || defined(CONFIG_MPC8610)
40 #define FSL_HW_NUM_LAWS 10
41 #elif defined(CONFIG_MPC8536) || defined(CONFIG_MPC8572) || \
42 defined(CONFIG_P2020) || defined(CONFIG_P1020)
43 #define FSL_HW_NUM_LAWS 12
45 #error FSL_HW_NUM_LAWS not defined for this platform
48 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
50 volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
51 volatile u32 *lawbar = base + 8 * idx;
52 volatile u32 *lawar = base + 8 * idx + 2;
54 gd->used_laws |= (1 << idx);
57 out_be32(lawbar, addr >> 12);
58 out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
63 int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
65 u32 idx = ffz(gd->used_laws);
67 if (idx >= FSL_HW_NUM_LAWS)
70 set_law(idx, addr, sz, id);
75 int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
79 /* we have no LAWs free */
80 if (gd->used_laws == -1)
83 /* grab the last free law */
84 idx = __ilog2(~(gd->used_laws));
86 if (idx >= FSL_HW_NUM_LAWS)
89 set_law(idx, addr, sz, id);
94 void disable_law(u8 idx)
96 volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
97 volatile u32 *lawbar = base + 8 * idx;
98 volatile u32 *lawar = base + 8 * idx + 2;
100 gd->used_laws &= ~(1 << idx);
108 void print_laws(void)
110 volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
111 volatile u32 *lawbar = base;
112 volatile u32 *lawar = base + 2;
115 printf("\nLocal Access Window Configuration\n");
116 for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
117 printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
118 i, in_be32(lawbar), i, in_be32(lawar));
126 /* use up to 2 LAWs for DDR, used the last available LAWs */
127 int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
129 u64 start_align, law_sz;
133 start_align = 1ull << (LAW_SIZE_32G + 1);
135 start_align = 1ull << (ffs64(start) - 1);
136 law_sz = min(start_align, sz);
137 law_sz_enc = __ilog2_u64(law_sz) - 1;
139 if (set_last_law(start, law_sz_enc, id) < 0)
142 /* recalculate size based on what was actually covered by the law */
143 law_sz = 1ull << __ilog2_u64(law_sz);
145 /* do we still have anything to map */
150 start_align = 1ull << (ffs64(start) - 1);
151 law_sz = min(start_align, sz);
152 law_sz_enc = __ilog2_u64(law_sz) - 1;
154 if (set_last_law(start, law_sz_enc, id) < 0)
160 /* do we still have anything to map */
172 gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
174 for (i = 0; i < num_law_entries; i++) {
175 if (law_table[i].index == -1)
176 set_next_law(law_table[i].addr, law_table[i].size,
177 law_table[i].trgt_id);
179 set_law(law_table[i].index, law_table[i].addr,
180 law_table[i].size, law_table[i].trgt_id);