1 /* Blackfin External Bus Interface Unit (EBIU) SDRAM Controller (SDC) Model.
3 Copyright (C) 2010-2016 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);
59 /* Invalid access mode is higher priority than missing register. */
60 if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, true))
64 value = dv_load_4 (source);
66 value = dv_load_2 (source);
68 mmr_off = addr - sdc->base;
69 valuep = (void *)((unsigned long)sdc + mmr_base() + mmr_off);
77 case mmr_offset(sdgctl):
78 /* XXX: SRFS should make external mem unreadable. */
81 case mmr_offset(sdbctl):
84 if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true))
90 if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
95 case mmr_offset(sdrrc):
96 if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
100 case mmr_offset(sdstat):
101 if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
103 /* XXX: Some bits are W1C ... */
111 bfin_ebiu_sdc_io_read_buffer (struct hw *me, void *dest,
112 int space, address_word addr, unsigned nr_bytes)
114 struct bfin_ebiu_sdc *sdc = hw_data (me);
120 /* Invalid access mode is higher priority than missing register. */
121 if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, false))
124 mmr_off = addr - sdc->base;
125 valuep = (void *)((unsigned long)sdc + mmr_base() + mmr_off);
133 case mmr_offset(sdgctl):
134 dv_store_4 (dest, *value32p);
136 case mmr_offset(sdbctl):
137 if (sdc->type == 561)
139 if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false))
141 dv_store_4 (dest, *value32p);
145 if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
147 dv_store_2 (dest, *value16p);
150 case mmr_offset(sdrrc):
151 case mmr_offset(sdstat):
152 if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
154 dv_store_2 (dest, *value16p);
162 attach_bfin_ebiu_sdc_regs (struct hw *me, struct bfin_ebiu_sdc *sdc)
164 address_word attach_address;
166 unsigned attach_size;
167 reg_property_spec reg;
169 if (hw_find_property (me, "reg") == NULL)
170 hw_abort (me, "Missing \"reg\" property");
172 if (!hw_find_reg_array_property (me, "reg", 0, ®))
173 hw_abort (me, "\"reg\" property must contain three addr/size entries");
175 hw_unit_address_to_attach_address (hw_parent (me),
177 &attach_space, &attach_address, me);
178 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
180 if (attach_size != BFIN_MMR_EBIU_SDC_SIZE)
181 hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EBIU_SDC_SIZE);
183 hw_attach_address (hw_parent (me),
184 0, attach_space, attach_address, attach_size, me);
186 sdc->base = attach_address;
190 bfin_ebiu_sdc_finish (struct hw *me)
192 struct bfin_ebiu_sdc *sdc;
194 sdc = HW_ZALLOC (me, struct bfin_ebiu_sdc);
196 set_hw_data (me, sdc);
197 set_hw_io_read_buffer (me, bfin_ebiu_sdc_io_read_buffer);
198 set_hw_io_write_buffer (me, bfin_ebiu_sdc_io_write_buffer);
200 attach_bfin_ebiu_sdc_regs (me, sdc);
202 sdc->type = hw_find_integer_property (me, "type");
204 /* Initialize the SDC. */
205 sdc->sdgctl = 0xE0088849;
206 sdc->sdbctl = 0x00000000;
208 sdc->sdstat = 0x0008;
210 /* XXX: We boot with 64M external memory by default ... */
211 sdc->sdbctl |= EBE | EBSZ_64 | EBCAW_10;
214 const struct hw_descriptor dv_bfin_ebiu_sdc_descriptor[] =
216 {"bfin_ebiu_sdc", bfin_ebiu_sdc_finish,},