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_P1011) || defined(CONFIG_P1020) || \
43 defined(CONFIG_P2010) || defined(CONFIG_P2020)
44 #define FSL_HW_NUM_LAWS 12
46 #error FSL_HW_NUM_LAWS not defined for this platform
49 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
51 volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
52 volatile u32 *lawbar = base + 8 * idx;
53 volatile u32 *lawar = base + 8 * idx + 2;
55 gd->used_laws |= (1 << idx);
58 out_be32(lawbar, addr >> 12);
59 out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
61 /* Read back so that we sync the writes */
65 int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
67 u32 idx = ffz(gd->used_laws);
69 if (idx >= FSL_HW_NUM_LAWS)
72 set_law(idx, addr, sz, id);
77 int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
81 /* we have no LAWs free */
82 if (gd->used_laws == -1)
85 /* grab the last free law */
86 idx = __ilog2(~(gd->used_laws));
88 if (idx >= FSL_HW_NUM_LAWS)
91 set_law(idx, addr, sz, id);
96 void disable_law(u8 idx)
98 volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
99 volatile u32 *lawbar = base + 8 * idx;
100 volatile u32 *lawar = base + 8 * idx + 2;
102 gd->used_laws &= ~(1 << idx);
110 void print_laws(void)
112 volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
113 volatile u32 *lawbar = base;
114 volatile u32 *lawar = base + 2;
117 printf("\nLocal Access Window Configuration\n");
118 for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
119 printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
120 i, in_be32(lawbar), i, in_be32(lawar));
128 /* use up to 2 LAWs for DDR, used the last available LAWs */
129 int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
131 u64 start_align, law_sz;
135 start_align = 1ull << (LAW_SIZE_32G + 1);
137 start_align = 1ull << (ffs64(start) - 1);
138 law_sz = min(start_align, sz);
139 law_sz_enc = __ilog2_u64(law_sz) - 1;
141 if (set_last_law(start, law_sz_enc, id) < 0)
144 /* recalculate size based on what was actually covered by the law */
145 law_sz = 1ull << __ilog2_u64(law_sz);
147 /* do we still have anything to map */
152 start_align = 1ull << (ffs64(start) - 1);
153 law_sz = min(start_align, sz);
154 law_sz_enc = __ilog2_u64(law_sz) - 1;
156 if (set_last_law(start, law_sz_enc, id) < 0)
162 /* do we still have anything to map */
174 gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
176 for (i = 0; i < num_law_entries; i++) {
177 if (law_table[i].index == -1)
178 set_next_law(law_table[i].addr, law_table[i].size,
179 law_table[i].trgt_id);
181 set_law(law_table[i].index, law_table[i].addr,
182 law_table[i].size, law_table[i].trgt_id);