1 /* Blackfin External Bus Interface Unit (EBIU) SDRAM Controller (SDC) Model.
3 Copyright (C) 2010-2011 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (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, see <http://www.gnu.org/licenses/>. */
25 #include "dv-bfin_ebiu_sdc.h"
31 bu32 reg_size
, bank_size
;
33 /* Order after here is important -- matches hardware MMR layout. */
35 bu32 sdbctl
; /* 16bit on most parts ... */
36 bu16
BFIN_MMR_16(sdrrc
);
37 bu16
BFIN_MMR_16(sdstat
);
39 #define mmr_base() offsetof(struct bfin_ebiu_sdc, sdgctl)
40 #define mmr_offset(mmr) (offsetof(struct bfin_ebiu_sdc, mmr) - mmr_base())
42 static const char * const mmr_names
[] = {
43 "EBIU_SDGCTL", "EBIU_SDBCTL", "EBIU_SDRRC", "EBIU_SDSTAT",
45 #define mmr_name(off) mmr_names[(off) / 4]
48 bfin_ebiu_sdc_io_write_buffer (struct hw
*me
, const void *source
,
49 int space
, address_word addr
, unsigned nr_bytes
)
51 struct bfin_ebiu_sdc
*sdc
= hw_data (me
);
59 value
= dv_load_4 (source
);
61 value
= dv_load_2 (source
);
63 mmr_off
= addr
- sdc
->base
;
64 valuep
= (void *)((unsigned long)sdc
+ mmr_base() + mmr_off
);
72 case mmr_offset(sdgctl
):
73 /* XXX: SRFS should make external mem unreadable. */
76 case mmr_offset(sdbctl
):
79 dv_bfin_mmr_require_32 (me
, addr
, nr_bytes
, true);
84 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true);
88 case mmr_offset(sdrrc
):
89 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true);
92 case mmr_offset(sdstat
):
93 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true);
94 /* XXX: Some bits are W1C ... */
102 bfin_ebiu_sdc_io_read_buffer (struct hw
*me
, void *dest
,
103 int space
, address_word addr
, unsigned nr_bytes
)
105 struct bfin_ebiu_sdc
*sdc
= hw_data (me
);
111 mmr_off
= addr
- sdc
->base
;
112 valuep
= (void *)((unsigned long)sdc
+ mmr_base() + mmr_off
);
120 case mmr_offset(sdgctl
):
121 dv_store_4 (dest
, *value32p
);
123 case mmr_offset(sdbctl
):
124 if (sdc
->type
== 561)
126 dv_bfin_mmr_require_32 (me
, addr
, nr_bytes
, false);
127 dv_store_4 (dest
, *value32p
);
131 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, false);
132 dv_store_2 (dest
, *value16p
);
135 case mmr_offset(sdrrc
):
136 case mmr_offset(sdstat
):
137 dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, false);
138 dv_store_2 (dest
, *value16p
);
146 attach_bfin_ebiu_sdc_regs (struct hw
*me
, struct bfin_ebiu_sdc
*sdc
)
148 address_word attach_address
;
150 unsigned attach_size
;
151 reg_property_spec reg
;
153 if (hw_find_property (me
, "reg") == NULL
)
154 hw_abort (me
, "Missing \"reg\" property");
156 if (!hw_find_reg_array_property (me
, "reg", 0, ®
))
157 hw_abort (me
, "\"reg\" property must contain three addr/size entries");
159 hw_unit_address_to_attach_address (hw_parent (me
),
161 &attach_space
, &attach_address
, me
);
162 hw_unit_size_to_attach_size (hw_parent (me
), ®
.size
, &attach_size
, me
);
164 if (attach_size
!= BFIN_MMR_EBIU_SDC_SIZE
)
165 hw_abort (me
, "\"reg\" size must be %#x", BFIN_MMR_EBIU_SDC_SIZE
);
167 hw_attach_address (hw_parent (me
),
168 0, attach_space
, attach_address
, attach_size
, me
);
170 sdc
->base
= attach_address
;
174 bfin_ebiu_sdc_finish (struct hw
*me
)
176 struct bfin_ebiu_sdc
*sdc
;
178 sdc
= HW_ZALLOC (me
, struct bfin_ebiu_sdc
);
180 set_hw_data (me
, sdc
);
181 set_hw_io_read_buffer (me
, bfin_ebiu_sdc_io_read_buffer
);
182 set_hw_io_write_buffer (me
, bfin_ebiu_sdc_io_write_buffer
);
184 attach_bfin_ebiu_sdc_regs (me
, sdc
);
186 sdc
->type
= hw_find_integer_property (me
, "type");
188 /* Initialize the SDC. */
189 sdc
->sdgctl
= 0xE0088849;
190 sdc
->sdbctl
= 0x00000000;
192 sdc
->sdstat
= 0x0008;
194 /* XXX: We boot with 64M external memory by default ... */
195 sdc
->sdbctl
|= EBE
| EBSZ_64
| EBCAW_10
;
198 const struct hw_descriptor dv_bfin_ebiu_sdc_descriptor
[] = {
199 {"bfin_ebiu_sdc", bfin_ebiu_sdc_finish
,},