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,},