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// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* QtMips - MIPS 32-bit Architecture Subset Simulator
*
* Implemented to support following courses:
*
* B35APO - Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b35apo
*
* B4M35PAP - Advanced Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
*
* Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
* Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
******************************************************************************/
#include "physaddrspace.h"
using namespace machine;
PhysAddrSpace::PhysAddrSpace() {
}
PhysAddrSpace::~PhysAddrSpace() {
while (!ranges_by_access.isEmpty()) {
RangeDesc *p_range = ranges_by_access.first();
ranges_by_addr.remove(p_range->last_addr);
ranges_by_access.remove(p_range->mem_acces);
if (p_range->owned)
delete p_range->mem_acces;
delete p_range;
}
}
bool PhysAddrSpace::wword(std::uint32_t address, std::uint32_t value) {
RangeDesc *p_range = find_range(address);
if (p_range == nullptr)
return false;
return p_range->mem_acces->write_word(address - p_range->start_addr, value);
}
std::uint32_t PhysAddrSpace::rword(std::uint32_t address) const {
const RangeDesc *p_range = find_range(address);
if (p_range == nullptr)
return 0x00000000;
return p_range->mem_acces->read_word(address - p_range->start_addr);
}
enum LocationStatus PhysAddrSpace::location_status(std::uint32_t address) const {
const RangeDesc *p_range = find_range(address);
if (p_range == nullptr)
return LOCSTAT_ILLEGAL;
return p_range->mem_acces->location_status(address - p_range->start_addr);
}
PhysAddrSpace::RangeDesc *PhysAddrSpace::find_range(std::uint32_t address) const {
PhysAddrSpace::RangeDesc *p_range;
auto i = ranges_by_addr.lowerBound(address);
if (i == ranges_by_addr.end())
return nullptr;
p_range = i.value();
if (address >= p_range->start_addr && address <= p_range->last_addr)
return p_range;
return nullptr;
}
bool PhysAddrSpace::insert_range(MemoryAccess *mem_acces, std::uint32_t start_addr, std::uint32_t last_addr, bool move_ownership) {
RangeDesc *p_range = new RangeDesc(mem_acces, start_addr, last_addr, move_ownership);
auto i = ranges_by_addr.lowerBound(start_addr);
if (i != ranges_by_addr.end()) {
if (i.value()->start_addr <= last_addr && i.value()->last_addr >= start_addr)
return false;
}
ranges_by_addr.insert(last_addr, p_range);
ranges_by_access.insert(mem_acces, p_range);
return true;
}
bool PhysAddrSpace::remove_range(MemoryAccess *mem_acces) {
RangeDesc *p_range = ranges_by_access.take(mem_acces);
if (p_range == nullptr)
return false;
ranges_by_addr.remove(p_range->last_addr);
if (p_range->owned)
delete p_range->mem_acces;
delete p_range;
return true;
}
void PhysAddrSpace::clean_range(std::uint32_t start_addr, std::uint32_t last_addr) {
auto i = ranges_by_addr.lowerBound(start_addr);
while (i != ranges_by_addr.end()) {
RangeDesc *p_range = i.value();
i++;
if (p_range->start_addr <= last_addr)
remove_range(p_range->mem_acces);
else
break;
}
}
PhysAddrSpace::RangeDesc::RangeDesc(MemoryAccess *mem_acces, std::uint32_t start_addr, std::uint32_t last_addr, bool owned) {
this->mem_acces = mem_acces;
this->start_addr = start_addr;
this->last_addr = last_addr;
this->owned = owned;
}
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