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[] =
44 "EBIU_SDGCTL", "EBIU_SDBCTL", "EBIU_SDRRC", "EBIU_SDSTAT",
46 #define mmr_name(off) mmr_names[(off) / 4]
49 bfin_ebiu_sdc_io_write_buffer (struct hw *me, const void *source,
50 int space, address_word addr, unsigned nr_bytes)
52 struct bfin_ebiu_sdc *sdc = hw_data (me);
60 value = dv_load_4 (source);
62 value = dv_load_2 (source);
64 mmr_off = addr - sdc->base;
65 valuep = (void *)((unsigned long)sdc + mmr_base() + mmr_off);
73 case mmr_offset(sdgctl):
74 /* XXX: SRFS should make external mem unreadable. */
77 case mmr_offset(sdbctl):
80 dv_bfin_mmr_require_32 (me, addr, nr_bytes, true);
85 dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
89 case mmr_offset(sdrrc):
90 dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
93 case mmr_offset(sdstat):
94 dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
95 /* XXX: Some bits are W1C ... */
103 bfin_ebiu_sdc_io_read_buffer (struct hw *me, void *dest,
104 int space, address_word addr, unsigned nr_bytes)
106 struct bfin_ebiu_sdc *sdc = hw_data (me);
112 mmr_off = addr - sdc->base;
113 valuep = (void *)((unsigned long)sdc + mmr_base() + mmr_off);
121 case mmr_offset(sdgctl):
122 dv_store_4 (dest, *value32p);
124 case mmr_offset(sdbctl):
125 if (sdc->type == 561)
127 dv_bfin_mmr_require_32 (me, addr, nr_bytes, false);
128 dv_store_4 (dest, *value32p);
132 dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
133 dv_store_2 (dest, *value16p);
136 case mmr_offset(sdrrc):
137 case mmr_offset(sdstat):
138 dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
139 dv_store_2 (dest, *value16p);
147 attach_bfin_ebiu_sdc_regs (struct hw *me, struct bfin_ebiu_sdc *sdc)
149 address_word attach_address;
151 unsigned attach_size;
152 reg_property_spec reg;
154 if (hw_find_property (me, "reg") == NULL)
155 hw_abort (me, "Missing \"reg\" property");
157 if (!hw_find_reg_array_property (me, "reg", 0, ®))
158 hw_abort (me, "\"reg\" property must contain three addr/size entries");
160 hw_unit_address_to_attach_address (hw_parent (me),
162 &attach_space, &attach_address, me);
163 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
165 if (attach_size != BFIN_MMR_EBIU_SDC_SIZE)
166 hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EBIU_SDC_SIZE);
168 hw_attach_address (hw_parent (me),
169 0, attach_space, attach_address, attach_size, me);
171 sdc->base = attach_address;
175 bfin_ebiu_sdc_finish (struct hw *me)
177 struct bfin_ebiu_sdc *sdc;
179 sdc = HW_ZALLOC (me, struct bfin_ebiu_sdc);
181 set_hw_data (me, sdc);
182 set_hw_io_read_buffer (me, bfin_ebiu_sdc_io_read_buffer);
183 set_hw_io_write_buffer (me, bfin_ebiu_sdc_io_write_buffer);
185 attach_bfin_ebiu_sdc_regs (me, sdc);
187 sdc->type = hw_find_integer_property (me, "type");
189 /* Initialize the SDC. */
190 sdc->sdgctl = 0xE0088849;
191 sdc->sdbctl = 0x00000000;
193 sdc->sdstat = 0x0008;
195 /* XXX: We boot with 64M external memory by default ... */
196 sdc->sdbctl |= EBE | EBSZ_64 | EBCAW_10;
199 const struct hw_descriptor dv_bfin_ebiu_sdc_descriptor[] =
201 {"bfin_ebiu_sdc", bfin_ebiu_sdc_finish,},