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/* Blackfin External Bus Interface Unit (EBIU) DDR Controller (DDRC) Model.
Copyright (C) 2010-2024 Free Software Foundation, Inc.
Contributed by Analog Devices, Inc.
This file is part of simulators.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This must come before any other includes. */
#include "defs.h"
#include "sim-main.h"
#include "devices.h"
#include "dv-bfin_ebiu_ddrc.h"
struct bfin_ebiu_ddrc
{
bu32 base, reg_size, bank_size;
/* Order after here is important -- matches hardware MMR layout. */
union {
struct { bu32 ddrctl0, ddrctl1, ddrctl2, ddrctl3; };
bu32 ddrctl[4];
};
bu32 ddrque, erradd;
bu16 BFIN_MMR_16(errmst);
bu16 BFIN_MMR_16(rstctl);
bu32 ddrbrc[8], ddrbwc[8];
bu32 ddracct, ddrtact, ddrarct;
bu32 ddrgc[4];
bu32 ddrmcen, ddrmccl;
};
#define mmr_base() offsetof(struct bfin_ebiu_ddrc, ddrctl0)
#define mmr_offset(mmr) (offsetof(struct bfin_ebiu_ddrc, mmr) - mmr_base())
static const char * const mmr_names[] =
{
"EBIU_DDRCTL0", "EBIU_DDRCTL1", "EBIU_DDRCTL2", "EBIU_DDRCTL3", "EBIU_DDRQUE",
"EBIU_ERRADD", "EBIU_ERRMST", "EBIU_RSTCTL", "EBIU_DDRBRC0", "EBIU_DDRBRC1",
"EBIU_DDRBRC2", "EBIU_DDRBRC3", "EBIU_DDRBRC4", "EBIU_DDRBRC5",
"EBIU_DDRBRC6", "EBIU_DDRBRC7", "EBIU_DDRBWC0", "EBIU_DDRBWC1"
"EBIU_DDRBWC2", "EBIU_DDRBWC3", "EBIU_DDRBWC4", "EBIU_DDRBWC5",
"EBIU_DDRBWC6", "EBIU_DDRBWC7", "EBIU_DDRACCT", "EBIU_DDRTACT",
"EBIU_ARCT", "EBIU_DDRGC0", "EBIU_DDRGC1", "EBIU_DDRGC2", "EBIU_DDRGC3",
"EBIU_DDRMCEN", "EBIU_DDRMCCL",
};
#define mmr_name(off) mmr_names[(off) / 4]
static unsigned
bfin_ebiu_ddrc_io_write_buffer (struct hw *me, const void *source,
int space, address_word addr, unsigned nr_bytes)
{
struct bfin_ebiu_ddrc *ddrc = hw_data (me);
bu32 mmr_off;
bu32 value;
bu16 *value16p;
bu32 *value32p;
void *valuep;
/* Invalid access mode is higher priority than missing register. */
if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, true))
return 0;
if (nr_bytes == 4)
value = dv_load_4 (source);
else
value = dv_load_2 (source);
mmr_off = addr - ddrc->base;
valuep = (void *)((uintptr_t)ddrc + mmr_base() + mmr_off);
value16p = valuep;
value32p = valuep;
HW_TRACE_WRITE ();
switch (mmr_off)
{
case mmr_offset(errmst):
case mmr_offset(rstctl):
if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
return 0;
*value16p = value;
break;
default:
if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true))
return 0;
*value32p = value;
break;
}
return nr_bytes;
}
static unsigned
bfin_ebiu_ddrc_io_read_buffer (struct hw *me, void *dest,
int space, address_word addr, unsigned nr_bytes)
{
struct bfin_ebiu_ddrc *ddrc = hw_data (me);
bu32 mmr_off;
bu32 *value32p;
bu16 *value16p;
void *valuep;
/* Invalid access mode is higher priority than missing register. */
if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, true))
return 0;
mmr_off = addr - ddrc->base;
valuep = (void *)((uintptr_t)ddrc + mmr_base() + mmr_off);
value16p = valuep;
value32p = valuep;
HW_TRACE_READ ();
switch (mmr_off)
{
case mmr_offset(errmst):
case mmr_offset(rstctl):
if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
return 0;
dv_store_2 (dest, *value16p);
break;
default:
if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false))
return 0;
dv_store_4 (dest, *value32p);
break;
}
return nr_bytes;
}
static void
attach_bfin_ebiu_ddrc_regs (struct hw *me, struct bfin_ebiu_ddrc *ddrc)
{
address_word attach_address;
int attach_space;
unsigned attach_size;
reg_property_spec reg;
if (hw_find_property (me, "reg") == NULL)
hw_abort (me, "Missing \"reg\" property");
if (!hw_find_reg_array_property (me, "reg", 0, ®))
hw_abort (me, "\"reg\" property must contain three addr/size entries");
hw_unit_address_to_attach_address (hw_parent (me),
®.address,
&attach_space, &attach_address, me);
hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
if (attach_size != BFIN_MMR_EBIU_DDRC_SIZE)
hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EBIU_DDRC_SIZE);
hw_attach_address (hw_parent (me),
0, attach_space, attach_address, attach_size, me);
ddrc->base = attach_address;
}
static void
bfin_ebiu_ddrc_finish (struct hw *me)
{
struct bfin_ebiu_ddrc *ddrc;
ddrc = HW_ZALLOC (me, struct bfin_ebiu_ddrc);
set_hw_data (me, ddrc);
set_hw_io_read_buffer (me, bfin_ebiu_ddrc_io_read_buffer);
set_hw_io_write_buffer (me, bfin_ebiu_ddrc_io_write_buffer);
attach_bfin_ebiu_ddrc_regs (me, ddrc);
/* Initialize the DDRC. */
ddrc->ddrctl0 = 0x098E8411;
ddrc->ddrctl1 = 0x10026223;
ddrc->ddrctl2 = 0x00000021;
ddrc->ddrctl3 = 0x00000003; /* XXX: MDDR is 0x20 ... */
ddrc->ddrque = 0x00001115;
ddrc->rstctl = 0x0002;
}
const struct hw_descriptor dv_bfin_ebiu_ddrc_descriptor[] =
{
{"bfin_ebiu_ddrc", bfin_ebiu_ddrc_finish,},
{NULL, NULL},
};
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