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/* Blackfin device support.
Copyright (C) 2010-2011 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 "sim-hw.h"
#include "hw-device.h"
#include "dv-bfin_cec.h"
#include "dv-bfin_mmu.h"
static void
bfin_mmr_invalid (struct hw *me, SIM_CPU *cpu, address_word addr,
unsigned nr_bytes, bool write)
{
if (!cpu)
cpu = hw_system_cpu (me);
/* Only throw a fit if the cpu is doing the access. DMA/GDB simply
go unnoticed. Not exactly hardware behavior, but close enough. */
if (!cpu)
{
sim_io_eprintf (hw_system (me), "%s: invalid MMR access @ %#x\n",
hw_path (me), addr);
return;
}
HW_TRACE ((me, "invalid MMR %s to 0x%08lx length %u",
write ? "write" : "read", (unsigned long) addr, nr_bytes));
/* XXX: is this what hardware does ? */
if (addr >= BFIN_CORE_MMR_BASE)
/* XXX: This should be setting up CPLB fault addrs ? */
mmu_process_fault (cpu, addr, write, false, false, true);
else
/* XXX: Newer parts set up an interrupt from EBIU and program
EBIU_ERRADDR with the address. */
cec_hwerr (cpu, HWERR_SYSTEM_MMR);
}
void
dv_bfin_mmr_invalid (struct hw *me, address_word addr, unsigned nr_bytes,
bool write)
{
bfin_mmr_invalid (me, NULL, addr, nr_bytes, write);
}
void
dv_bfin_mmr_require (struct hw *me, address_word addr, unsigned nr_bytes,
unsigned size, bool write)
{
if (nr_bytes != size)
dv_bfin_mmr_invalid (me, addr, nr_bytes, write);
}
static bool
bfin_mmr_check (struct hw *me, SIM_CPU *cpu, address_word addr,
unsigned nr_bytes, bool write)
{
if (addr >= BFIN_CORE_MMR_BASE)
{
/* All Core MMRs are aligned 32bits. */
if ((addr & 3) == 0 && nr_bytes == 4)
return true;
}
else if (addr >= BFIN_SYSTEM_MMR_BASE)
{
/* All System MMRs are 32bit aligned, but can be 16bits or 32bits. */
if ((addr & 0x3) == 0 && (nr_bytes == 2 || nr_bytes == 4))
return true;
}
else
return true;
/* Still here ? Must be crap. */
bfin_mmr_invalid (me, cpu, addr, nr_bytes, write);
return false;
}
bool
dv_bfin_mmr_check (struct hw *me, address_word addr, unsigned nr_bytes,
bool write)
{
return bfin_mmr_check (me, NULL, addr, nr_bytes, write);
}
int
device_io_read_buffer (device *me, void *source, int space,
address_word addr, unsigned nr_bytes,
SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
{
struct hw *dv_me = (struct hw *) me;
if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
return nr_bytes;
if (bfin_mmr_check (dv_me, cpu, addr, nr_bytes, false))
if (cpu)
{
sim_cpu_hw_io_read_buffer (cpu, cia, dv_me, source, space,
addr, nr_bytes);
return nr_bytes;
}
else
return sim_hw_io_read_buffer (sd, dv_me, source, space, addr, nr_bytes);
else
return 0;
}
int
device_io_write_buffer (device *me, const void *source, int space,
address_word addr, unsigned nr_bytes,
SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
{
struct hw *dv_me = (struct hw *) me;
if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
return nr_bytes;
if (bfin_mmr_check (dv_me, cpu, addr, nr_bytes, true))
if (cpu)
{
sim_cpu_hw_io_write_buffer (cpu, cia, dv_me, source, space,
addr, nr_bytes);
return nr_bytes;
}
else
return sim_hw_io_write_buffer (sd, dv_me, source, space, addr, nr_bytes);
else
return 0;
}
void device_error (device *me, const char *message, ...)
{
/* Don't bother doing anything here -- any place in common code that
calls device_error() follows it with sim_hw_abort(). Since the
device isn't bound to the system yet, we can't call any common
hardware error funcs on it or we'll hit a NULL pointer. */
}
unsigned int dv_get_bus_num (struct hw *me)
{
const hw_unit *unit = hw_unit_address (me);
return unit->cells[unit->nr_cells - 1];
}
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