/* Blackfin device support. Copyright (C) 2010-2012 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]; }