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/* Blackfin Performance Monitor model.
Copyright (C) 2010-2013 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/>. */
#include "config.h"
#include "sim-main.h"
#include "devices.h"
#include "dv-bfin_pfmon.h"
/* XXX: This is mostly a stub. */
struct bfin_pfmon
{
bu32 base;
/* Order after here is important -- matches hardware MMR layout. */
bu32 ctl;
bu32 _pad0[63];
bu32 cntr0, cntr1;
};
#define mmr_base() offsetof(struct bfin_pfmon, ctl)
#define mmr_offset(mmr) (offsetof(struct bfin_pfmon, mmr) - mmr_base())
static const char * const mmr_names[] =
{
"PFCTL", [mmr_offset (cntr0)] = "PFCNTR0", "PFCNTR1",
};
#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
static unsigned
bfin_pfmon_io_write_buffer (struct hw *me, const void *source, int space,
address_word addr, unsigned nr_bytes)
{
struct bfin_pfmon *pfmon = hw_data (me);
bu32 mmr_off;
bu32 value;
bu32 *valuep;
value = dv_load_4 (source);
mmr_off = addr - pfmon->base;
valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off);
HW_TRACE_WRITE ();
switch (mmr_off)
{
case mmr_offset(ctl):
case mmr_offset(cntr0):
case mmr_offset(cntr1):
*valuep = value;
break;
default:
dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
break;
}
return nr_bytes;
}
static unsigned
bfin_pfmon_io_read_buffer (struct hw *me, void *dest, int space,
address_word addr, unsigned nr_bytes)
{
struct bfin_pfmon *pfmon = hw_data (me);
bu32 mmr_off;
bu32 value;
bu32 *valuep;
mmr_off = addr - pfmon->base;
valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off);
HW_TRACE_READ ();
switch (mmr_off)
{
case mmr_offset(ctl):
case mmr_offset(cntr0):
case mmr_offset(cntr1):
value = *valuep;
break;
default:
while (1) /* Core MMRs -> exception -> doesn't return. */
dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
break;
}
dv_store_4 (dest, value);
return nr_bytes;
}
static void
attach_bfin_pfmon_regs (struct hw *me, struct bfin_pfmon *pfmon)
{
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_COREMMR_PFMON_SIZE)
hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_PFMON_SIZE);
hw_attach_address (hw_parent (me),
0, attach_space, attach_address, attach_size, me);
pfmon->base = attach_address;
}
static void
bfin_pfmon_finish (struct hw *me)
{
struct bfin_pfmon *pfmon;
pfmon = HW_ZALLOC (me, struct bfin_pfmon);
set_hw_data (me, pfmon);
set_hw_io_read_buffer (me, bfin_pfmon_io_read_buffer);
set_hw_io_write_buffer (me, bfin_pfmon_io_write_buffer);
attach_bfin_pfmon_regs (me, pfmon);
}
const struct hw_descriptor dv_bfin_pfmon_descriptor[] =
{
{"bfin_pfmon", bfin_pfmon_finish,},
{NULL, NULL},
};
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