| /* Blackfin device support. |
| |
| Copyright (C) 2010-2015 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 "devices.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]; |
| } |