2 * Copyright 2008-2011 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 FSL_HW_NUM_LAWS CONFIG_SYS_FSL_NUM_LAWS
34 #ifdef CONFIG_FSL_CORENET
35 #define LAW_BASE (CONFIG_SYS_FSL_CORENET_CCM_ADDR)
36 #define LAWAR_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawar)
37 #define LAWBARH_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawbarh)
38 #define LAWBARL_ADDR(x) (&((ccsr_local_t *)LAW_BASE)->law[x].lawbarl)
39 #define LAWBAR_SHIFT 0
41 #define LAW_BASE (CONFIG_SYS_IMMR + 0xc08)
42 #define LAWAR_ADDR(x) ((u32 *)LAW_BASE + 8 * x + 2)
43 #define LAWBAR_ADDR(x) ((u32 *)LAW_BASE + 8 * x)
44 #define LAWBAR_SHIFT 12
48 static inline phys_addr_t get_law_base_addr(int idx)
50 #ifdef CONFIG_FSL_CORENET
52 ((u64)in_be32(LAWBARH_ADDR(idx)) << 32) |
53 in_be32(LAWBARL_ADDR(idx));
55 return (phys_addr_t)in_be32(LAWBAR_ADDR(idx)) << LAWBAR_SHIFT;
59 static inline void set_law_base_addr(int idx, phys_addr_t addr)
61 #ifdef CONFIG_FSL_CORENET
62 out_be32(LAWBARL_ADDR(idx), addr & 0xffffffff);
63 out_be32(LAWBARH_ADDR(idx), (u64)addr >> 32);
65 out_be32(LAWBAR_ADDR(idx), addr >> LAWBAR_SHIFT);
69 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
71 gd->used_laws |= (1 << idx);
73 out_be32(LAWAR_ADDR(idx), 0);
74 set_law_base_addr(idx, addr);
75 out_be32(LAWAR_ADDR(idx), LAW_EN | ((u32)id << 20) | (u32)sz);
77 /* Read back so that we sync the writes */
78 in_be32(LAWAR_ADDR(idx));
81 void disable_law(u8 idx)
83 gd->used_laws &= ~(1 << idx);
85 out_be32(LAWAR_ADDR(idx), 0);
86 set_law_base_addr(idx, 0);
88 /* Read back so that we sync the writes */
89 in_be32(LAWAR_ADDR(idx));
94 #ifndef CONFIG_NAND_SPL
95 static int get_law_entry(u8 i, struct law_entry *e)
99 lawar = in_be32(LAWAR_ADDR(i));
101 if (!(lawar & LAW_EN))
104 e->addr = get_law_base_addr(i);
105 e->size = lawar & 0x3f;
106 e->trgt_id = (lawar >> 20) & 0xff;
112 int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
114 u32 idx = ffz(gd->used_laws);
116 if (idx >= FSL_HW_NUM_LAWS)
119 set_law(idx, addr, sz, id);
124 #ifndef CONFIG_NAND_SPL
125 int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
129 /* we have no LAWs free */
130 if (gd->used_laws == -1)
133 /* grab the last free law */
134 idx = __ilog2(~(gd->used_laws));
136 if (idx >= FSL_HW_NUM_LAWS)
139 set_law(idx, addr, sz, id);
144 struct law_entry find_law(phys_addr_t addr)
146 struct law_entry entry;
154 for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
157 if (!get_law_entry(i, &entry))
160 upper = entry.addr + (2ull << entry.size);
161 if ((addr >= entry.addr) && (addr < upper)) {
170 void print_laws(void)
175 printf("\nLocal Access Window Configuration\n");
176 for (i = 0; i < FSL_HW_NUM_LAWS; i++) {
177 lawar = in_be32(LAWAR_ADDR(i));
178 #ifdef CONFIG_FSL_CORENET
179 printf("LAWBARH%02d: 0x%08x LAWBARL%02d: 0x%08x",
180 i, in_be32(LAWBARH_ADDR(i)),
181 i, in_be32(LAWBARL_ADDR(i)));
183 printf("LAWBAR%02d: 0x%08x", i, in_be32(LAWBAR_ADDR(i)));
185 printf(" LAWAR0x%02d: 0x%08x\n", i, lawar);
186 printf("\t(EN: %d TGT: 0x%02x SIZE: ",
187 (lawar & LAW_EN) ? 1 : 0, (lawar >> 20) & 0xff);
188 print_size(lawar_size(lawar), ")\n");
194 /* use up to 2 LAWs for DDR, used the last available LAWs */
195 int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
197 u64 start_align, law_sz;
201 start_align = 1ull << (LAW_SIZE_32G + 1);
203 start_align = 1ull << (ffs64(start) - 1);
204 law_sz = min(start_align, sz);
205 law_sz_enc = __ilog2_u64(law_sz) - 1;
207 if (set_last_law(start, law_sz_enc, id) < 0)
210 /* recalculate size based on what was actually covered by the law */
211 law_sz = 1ull << __ilog2_u64(law_sz);
213 /* do we still have anything to map */
218 start_align = 1ull << (ffs64(start) - 1);
219 law_sz = min(start_align, sz);
220 law_sz_enc = __ilog2_u64(law_sz) - 1;
222 if (set_last_law(start, law_sz_enc, id) < 0)
228 /* do we still have anything to map */
241 #if FSL_HW_NUM_LAWS < 32
242 gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
243 #elif FSL_HW_NUM_LAWS == 32
246 #error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
249 for (i = 0; i < num_law_entries; i++) {
250 if (law_table[i].index == -1)
251 set_next_law(law_table[i].addr, law_table[i].size,
252 law_table[i].trgt_id);
254 set_law(law_table[i].index, law_table[i].addr,
255 law_table[i].size, law_table[i].trgt_id);