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git.ipfire.org Git - people/ms/u-boot.git/blob - cpu/mpc8xx/commproc.c
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 DECLARE_GLOBAL_DATA_PTR
;
29 #ifdef CFG_ALLOC_DPRAM
33 /* Reclaim the DP memory for our use. */
34 gd
->dp_alloc_base
= CPM_DATAONLY_BASE
;
35 gd
->dp_alloc_top
= CPM_DATAONLY_BASE
+ CPM_DATAONLY_SIZE
;
40 /* Allocate some memory from the dual ported ram. We may want to
41 * enforce alignment restrictions, but right now everyone is a good
44 uint
dpram_alloc (uint size
)
46 uint addr
= gd
->dp_alloc_base
;
48 if ((gd
->dp_alloc_base
+ size
) >= gd
->dp_alloc_top
)
49 return (CPM_DP_NOSPACE
);
51 gd
->dp_alloc_base
+= size
;
56 uint
dpram_base (void)
58 return gd
->dp_alloc_base
;
61 /* Allocate some memory from the dual ported ram. We may want to
62 * enforce alignment restrictions, but right now everyone is a good
65 uint
dpram_alloc_align (uint size
, uint align
)
67 uint addr
, mask
= align
- 1;
69 addr
= (gd
->dp_alloc_base
+ mask
) & ~mask
;
71 if ((addr
+ size
) >= gd
->dp_alloc_top
)
72 return (CPM_DP_NOSPACE
);
74 gd
->dp_alloc_base
= addr
+ size
;
79 uint
dpram_base_align (uint align
)
81 uint mask
= align
- 1;
83 return (gd
->dp_alloc_base
+ mask
) & ~mask
;
85 #endif /* CFG_ALLOC_DPRAM */
87 #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
89 void post_word_store (ulong a
)
91 volatile void *save_addr
=
92 ((immap_t
*) CFG_IMMR
)->im_cpm
.cp_dpmem
+ CPM_POST_WORD_ADDR
;
94 *(volatile ulong
*) save_addr
= a
;
97 ulong
post_word_load (void)
99 volatile void *save_addr
=
100 ((immap_t
*) CFG_IMMR
)->im_cpm
.cp_dpmem
+ CPM_POST_WORD_ADDR
;
102 return *(volatile ulong
*) save_addr
;
105 #endif /* CONFIG_POST || CONFIG_LOGBUFFER*/
107 #ifdef CONFIG_BOOTCOUNT_LIMIT
109 void bootcount_store (ulong a
)
111 volatile ulong
*save_addr
=
112 (volatile ulong
*)( ((immap_t
*) CFG_IMMR
)->im_cpm
.cp_dpmem
+
113 CPM_BOOTCOUNT_ADDR
);
116 save_addr
[1] = BOOTCOUNT_MAGIC
;
119 ulong
bootcount_load (void)
121 volatile ulong
*save_addr
=
122 (volatile ulong
*)( ((immap_t
*) CFG_IMMR
)->im_cpm
.cp_dpmem
+
123 CPM_BOOTCOUNT_ADDR
);
125 if (save_addr
[1] != BOOTCOUNT_MAGIC
)
131 #endif /* CONFIG_BOOTCOUNT_LIMIT */