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git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/misc/fsl_law.c
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
);