2 * Copyright 2008-2010 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 /* number of LAWs in the hw implementation */
33 #if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
34 defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555)
35 #define FSL_HW_NUM_LAWS 8
36 #elif defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544) || \
37 defined(CONFIG_MPC8568) || defined(CONFIG_MPC8569) || \
38 defined(CONFIG_MPC8641) || defined(CONFIG_MPC8610)
39 #define FSL_HW_NUM_LAWS 10
40 #elif defined(CONFIG_MPC8536) || defined(CONFIG_MPC8572) || \
41 defined(CONFIG_P1011) || defined(CONFIG_P1020) || \
42 defined(CONFIG_P1012) || defined(CONFIG_P1021) || \
43 defined(CONFIG_P1013) || defined(CONFIG_P1022) || \
44 defined(CONFIG_P2010) || defined(CONFIG_P2020)
45 #define FSL_HW_NUM_LAWS 12
46 #elif defined(CONFIG_PPC_P4080)
47 #define FSL_HW_NUM_LAWS 32
49 #error FSL_HW_NUM_LAWS not defined for this platform
52 #ifdef CONFIG_FSL_CORENET
53 void set_law(u8 idx
, phys_addr_t addr
, enum law_size sz
, enum law_trgt_if id
)
55 volatile ccsr_local_t
*ccm
= (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR
);
57 gd
->used_laws
|= (1 << idx
);
59 out_be32(&ccm
->law
[idx
].lawar
, 0);
60 out_be32(&ccm
->law
[idx
].lawbarh
, ((u64
)addr
>> 32));
61 out_be32(&ccm
->law
[idx
].lawbarl
, addr
& 0xffffffff);
62 out_be32(&ccm
->law
[idx
].lawar
, LAW_EN
| ((u32
)id
<< 20) | (u32
)sz
);
64 /* Read back so that we sync the writes */
65 in_be32(&ccm
->law
[idx
].lawar
);
68 void disable_law(u8 idx
)
70 volatile ccsr_local_t
*ccm
= (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR
);
72 gd
->used_laws
&= ~(1 << idx
);
74 out_be32(&ccm
->law
[idx
].lawar
, 0);
75 out_be32(&ccm
->law
[idx
].lawbarh
, 0);
76 out_be32(&ccm
->law
[idx
].lawbarl
, 0);
78 /* Read back so that we sync the writes */
79 in_be32(&ccm
->law
[idx
].lawar
);
84 #ifndef CONFIG_NAND_SPL
85 static int get_law_entry(u8 i
, struct law_entry
*e
)
87 volatile ccsr_local_t
*ccm
= (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR
);
90 lawar
= in_be32(&ccm
->law
[i
].lawar
);
92 if (!(lawar
& LAW_EN
))
95 e
->addr
= ((u64
)in_be32(&ccm
->law
[i
].lawbarh
) << 32) |
96 in_be32(&ccm
->law
[i
].lawbarl
);
97 e
->size
= lawar
& 0x3f;
98 e
->trgt_id
= (lawar
>> 20) & 0xff;
104 void set_law(u8 idx
, phys_addr_t addr
, enum law_size sz
, enum law_trgt_if id
)
106 volatile u32
*base
= (volatile u32
*)(CONFIG_SYS_IMMR
+ 0xc08);
107 volatile u32
*lawbar
= base
+ 8 * idx
;
108 volatile u32
*lawar
= base
+ 8 * idx
+ 2;
110 gd
->used_laws
|= (1 << idx
);
113 out_be32(lawbar
, addr
>> 12);
114 out_be32(lawar
, LAW_EN
| ((u32
)id
<< 20) | (u32
)sz
);
116 /* Read back so that we sync the writes */
120 void disable_law(u8 idx
)
122 volatile u32
*base
= (volatile u32
*)(CONFIG_SYS_IMMR
+ 0xc08);
123 volatile u32
*lawbar
= base
+ 8 * idx
;
124 volatile u32
*lawar
= base
+ 8 * idx
+ 2;
126 gd
->used_laws
&= ~(1 << idx
);
131 /* Read back so that we sync the writes */
137 #ifndef CONFIG_NAND_SPL
138 static int get_law_entry(u8 i
, struct law_entry
*e
)
140 volatile u32
*base
= (volatile u32
*)(CONFIG_SYS_IMMR
+ 0xc08);
141 volatile u32
*lawbar
= base
+ 8 * i
;
142 volatile u32
*lawar
= base
+ 8 * i
+ 2;
145 temp
= in_be32(lawar
);
147 if (!(temp
& LAW_EN
))
150 e
->addr
= (u64
)in_be32(lawbar
) << 12;
151 e
->size
= temp
& 0x3f;
152 e
->trgt_id
= (temp
>> 20) & 0xff;
159 int set_next_law(phys_addr_t addr
, enum law_size sz
, enum law_trgt_if id
)
161 u32 idx
= ffz(gd
->used_laws
);
163 if (idx
>= FSL_HW_NUM_LAWS
)
166 set_law(idx
, addr
, sz
, id
);
171 #ifndef CONFIG_NAND_SPL
172 int set_last_law(phys_addr_t addr
, enum law_size sz
, enum law_trgt_if id
)
176 /* we have no LAWs free */
177 if (gd
->used_laws
== -1)
180 /* grab the last free law */
181 idx
= __ilog2(~(gd
->used_laws
));
183 if (idx
>= FSL_HW_NUM_LAWS
)
186 set_law(idx
, addr
, sz
, id
);
191 struct law_entry
find_law(phys_addr_t addr
)
193 struct law_entry entry
;
201 for (i
= 0; i
< FSL_HW_NUM_LAWS
; i
++) {
204 if (!get_law_entry(i
, &entry
))
207 upper
= entry
.addr
+ (2ull << entry
.size
);
208 if ((addr
>= entry
.addr
) && (addr
< upper
)) {
217 void print_laws(void)
219 volatile u32
*base
= (volatile u32
*)(CONFIG_SYS_IMMR
+ 0xc08);
220 volatile u32
*lawbar
= base
;
221 volatile u32
*lawar
= base
+ 2;
224 printf("\nLocal Access Window Configuration\n");
225 for(i
= 0; i
< FSL_HW_NUM_LAWS
; i
++) {
226 printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
227 i
, in_be32(lawbar
), i
, in_be32(lawar
));
235 /* use up to 2 LAWs for DDR, used the last available LAWs */
236 int set_ddr_laws(u64 start
, u64 sz
, enum law_trgt_if id
)
238 u64 start_align
, law_sz
;
242 start_align
= 1ull << (LAW_SIZE_32G
+ 1);
244 start_align
= 1ull << (ffs64(start
) - 1);
245 law_sz
= min(start_align
, sz
);
246 law_sz_enc
= __ilog2_u64(law_sz
) - 1;
248 if (set_last_law(start
, law_sz_enc
, id
) < 0)
251 /* recalculate size based on what was actually covered by the law */
252 law_sz
= 1ull << __ilog2_u64(law_sz
);
254 /* do we still have anything to map */
259 start_align
= 1ull << (ffs64(start
) - 1);
260 law_sz
= min(start_align
, sz
);
261 law_sz_enc
= __ilog2_u64(law_sz
) - 1;
263 if (set_last_law(start
, law_sz_enc
, id
) < 0)
269 /* do we still have anything to map */
282 #if FSL_HW_NUM_LAWS < 32
283 gd
->used_laws
= ~((1 << FSL_HW_NUM_LAWS
) - 1);
284 #elif FSL_HW_NUM_LAWS == 32
287 #error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
290 for (i
= 0; i
< num_law_entries
; i
++) {
291 if (law_table
[i
].index
== -1)
292 set_next_law(law_table
[i
].addr
, law_table
[i
].size
,
293 law_table
[i
].trgt_id
);
295 set_law(law_table
[i
].index
, law_table
[i
].addr
,
296 law_table
[i
].size
, law_table
[i
].trgt_id
);