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Diffstat (limited to 'src/emu/dimemory.cpp')
-rw-r--r-- | src/emu/dimemory.cpp | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/src/emu/dimemory.cpp b/src/emu/dimemory.cpp new file mode 100644 index 00000000000..c10584817cb --- /dev/null +++ b/src/emu/dimemory.cpp @@ -0,0 +1,364 @@ +// license:BSD-3-Clause +// copyright-holders:Aaron Giles +/*************************************************************************** + + dimemory.c + + Device memory interfaces. + +***************************************************************************/ + +#include "emu.h" +#include "validity.h" + + +//************************************************************************** +// PARAMETERS +//************************************************************************** + +#define DETECT_OVERLAPPING_MEMORY (0) + + + +//************************************************************************** +// CONSTANTS +//************************************************************************** + +//const int TRIGGER_SUSPENDTIME = -4000; + + + +//************************************************************************** +// ADDRESS SPACE CONFIG +//************************************************************************** + +//------------------------------------------------- +// address_space_config - constructors +//------------------------------------------------- + +address_space_config::address_space_config() + : m_name("unknown"), + m_endianness(ENDIANNESS_NATIVE), + m_databus_width(0), + m_addrbus_width(0), + m_addrbus_shift(0), + m_logaddr_width(0), + m_page_shift(0), + m_internal_map(NULL), + m_default_map(NULL) +{ +} + +/*! + @param name + @param endian CPU endianness + @param datawidth CPU parallelism bits + @param addrwidth address bits + @param addrshift + @param internal + @param defmap + */ +address_space_config::address_space_config(const char *name, endianness_t endian, UINT8 datawidth, UINT8 addrwidth, INT8 addrshift, address_map_constructor internal, address_map_constructor defmap) + : m_name(name), + m_endianness(endian), + m_databus_width(datawidth), + m_addrbus_width(addrwidth), + m_addrbus_shift(addrshift), + m_logaddr_width(addrwidth), + m_page_shift(0), + m_internal_map(internal), + m_default_map(defmap) +{ +} + +address_space_config::address_space_config(const char *name, endianness_t endian, UINT8 datawidth, UINT8 addrwidth, INT8 addrshift, UINT8 logwidth, UINT8 pageshift, address_map_constructor internal, address_map_constructor defmap) + : m_name(name), + m_endianness(endian), + m_databus_width(datawidth), + m_addrbus_width(addrwidth), + m_addrbus_shift(addrshift), + m_logaddr_width(logwidth), + m_page_shift(pageshift), + m_internal_map(internal), + m_default_map(defmap) +{ +} + +address_space_config::address_space_config(const char *name, endianness_t endian, UINT8 datawidth, UINT8 addrwidth, INT8 addrshift, address_map_delegate internal, address_map_delegate defmap) + : m_name(name), + m_endianness(endian), + m_databus_width(datawidth), + m_addrbus_width(addrwidth), + m_addrbus_shift(addrshift), + m_logaddr_width(addrwidth), + m_page_shift(0), + m_internal_map(NULL), + m_default_map(NULL), + m_internal_map_delegate(internal), + m_default_map_delegate(defmap) +{ +} + +address_space_config::address_space_config(const char *name, endianness_t endian, UINT8 datawidth, UINT8 addrwidth, INT8 addrshift, UINT8 logwidth, UINT8 pageshift, address_map_delegate internal, address_map_delegate defmap) + : m_name(name), + m_endianness(endian), + m_databus_width(datawidth), + m_addrbus_width(addrwidth), + m_addrbus_shift(addrshift), + m_logaddr_width(logwidth), + m_page_shift(pageshift), + m_internal_map(NULL), + m_default_map(NULL), + m_internal_map_delegate(internal), + m_default_map_delegate(defmap) +{ +} + + +//************************************************************************** +// MEMORY DEVICE MANAGEMENT +//************************************************************************** + +//------------------------------------------------- +// device_memory_interface - constructor +//------------------------------------------------- + +device_memory_interface::device_memory_interface(const machine_config &mconfig, device_t &device) + : device_interface(device, "memory") +{ + memset(m_address_map, 0, sizeof(m_address_map)); + memset(m_addrspace, 0, sizeof(m_addrspace)); + + // configure the fast accessor + device.m_memory = this; +} + + +//------------------------------------------------- +// ~device_memory_interface - destructor +//------------------------------------------------- + +device_memory_interface::~device_memory_interface() +{ +} + + +//------------------------------------------------- +// static_set_addrmap - configuration helper +// to connect an address map to a device +//------------------------------------------------- + +void device_memory_interface::static_set_addrmap(device_t &device, address_spacenum spacenum, address_map_constructor map) +{ + device_memory_interface *memory; + if (!device.interface(memory)) + throw emu_fatalerror("MCFG_DEVICE_ADDRESS_MAP called on device '%s' with no memory interface", device.tag()); + if (spacenum >= ARRAY_LENGTH(memory->m_address_map)) + throw emu_fatalerror("MCFG_DEVICE_ADDRESS_MAP called on device '%s' with out-of-range space number %d", device.tag(), spacenum); + memory->m_address_map[spacenum] = map; +} + + +//------------------------------------------------- +// set_address_space - connect an address space +// to a device +//------------------------------------------------- + +void device_memory_interface::set_address_space(address_spacenum spacenum, address_space &space) +{ + assert(spacenum < ARRAY_LENGTH(m_addrspace)); + m_addrspace[spacenum] = &space; +} + + +//------------------------------------------------- +// memory_translate - translate from logical to +// phyiscal addresses; designed to be overridden +// by the actual device implementation if address +// translation is supported +//------------------------------------------------- + +bool device_memory_interface::memory_translate(address_spacenum spacenum, int intention, offs_t &address) +{ + // by default it maps directly + return true; +} + + +//------------------------------------------------- +// memory_read - perform internal memory +// operations that bypass the memory system; +// designed to be overridden by the actual device +// implementation if internal read operations are +// handled by bypassing the memory system +//------------------------------------------------- + +bool device_memory_interface::memory_read(address_spacenum spacenum, offs_t offset, int size, UINT64 &value) +{ + // by default, we don't do anything + return false; +} + + +//------------------------------------------------- +// memory_write - perform internal memory +// operations that bypass the memory system; +// designed to be overridden by the actual device +// implementation if internal write operations are +// handled by bypassing the memory system +//------------------------------------------------- + +bool device_memory_interface::memory_write(address_spacenum spacenum, offs_t offset, int size, UINT64 value) +{ + // by default, we don't do anything + return false; +} + + +//------------------------------------------------- +// memory_readop - perform internal memory +// operations that bypass the memory system; +// designed to be overridden by the actual device +// implementation if internal opcode fetching +// operations are handled by bypassing the memory +// system +//------------------------------------------------- + +bool device_memory_interface::memory_readop(offs_t offset, int size, UINT64 &value) +{ + // by default, we don't do anything + return false; +} + + +//------------------------------------------------- +// interface_validity_check - perform validity +// checks on the memory configuration +//------------------------------------------------- + +void device_memory_interface::interface_validity_check(validity_checker &valid) const +{ + bool detected_overlap = DETECT_OVERLAPPING_MEMORY ? false : true; + + // loop over all address spaces + for (address_spacenum spacenum = AS_0; spacenum < ADDRESS_SPACES; spacenum++) + { + const address_space_config *spaceconfig = space_config(spacenum); + if (spaceconfig != NULL) + { + int datawidth = spaceconfig->m_databus_width; + int alignunit = datawidth / 8; + + // construct the maps + ::address_map *map = global_alloc(::address_map(const_cast<device_t &>(device()), spacenum)); + + // if this is an empty map, just skip it + if (map->m_entrylist.first() == NULL) + { + global_free(map); + continue; + } + + // validate the global map parameters + if (map->m_spacenum != spacenum) + osd_printf_error("Space %d has address space %d handlers!\n", spacenum, map->m_spacenum); + if (map->m_databits != datawidth) + osd_printf_error("Wrong memory handlers provided for %s space! (width = %d, memory = %08x)\n", spaceconfig->m_name, datawidth, map->m_databits); + + // loop over entries and look for errors + for (address_map_entry *entry = map->m_entrylist.first(); entry != NULL; entry = entry->next()) + { + UINT32 bytestart = spaceconfig->addr2byte(entry->m_addrstart); + UINT32 byteend = spaceconfig->addr2byte_end(entry->m_addrend); + + // look for overlapping entries + if (!detected_overlap) + { + address_map_entry *scan; + for (scan = map->m_entrylist.first(); scan != entry; scan = scan->next()) + if (entry->m_addrstart <= scan->m_addrend && entry->m_addrend >= scan->m_addrstart && + ((entry->m_read.m_type != AMH_NONE && scan->m_read.m_type != AMH_NONE) || + (entry->m_write.m_type != AMH_NONE && scan->m_write.m_type != AMH_NONE))) + { + osd_printf_warning("%s space has overlapping memory (%X-%X,%d,%d) vs (%X-%X,%d,%d)\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, entry->m_read.m_type, entry->m_write.m_type, scan->m_addrstart, scan->m_addrend, scan->m_read.m_type, scan->m_write.m_type); + detected_overlap = true; + break; + } + } + + // look for inverted start/end pairs + if (byteend < bytestart) + osd_printf_error("Wrong %s memory read handler start = %08x > end = %08x\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend); + + // look for misaligned entries + if ((bytestart & (alignunit - 1)) != 0 || (byteend & (alignunit - 1)) != (alignunit - 1)) + osd_printf_error("Wrong %s memory read handler start = %08x, end = %08x ALIGN = %d\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, alignunit); + + // if this is a program space, auto-assign implicit ROM entries + if (entry->m_read.m_type == AMH_ROM && entry->m_region == NULL) + { + entry->m_region = device().tag(); + entry->m_rgnoffs = entry->m_addrstart; + } + + // if this entry references a memory region, validate it + if (entry->m_region != NULL && entry->m_share == 0) + { + // make sure we can resolve the full path to the region + bool found = false; + std::string entry_region = entry->m_devbase.subtag(entry->m_region); + + // look for the region + device_iterator deviter(device().mconfig().root_device()); + for (device_t *device = deviter.first(); device != NULL; device = deviter.next()) + for (const rom_entry *romp = rom_first_region(*device); romp != NULL && !found; romp = rom_next_region(romp)) + { + if (rom_region_name(*device, romp) == entry_region) + { + // verify the address range is within the region's bounds + offs_t length = ROMREGION_GETLENGTH(romp); + if (entry->m_rgnoffs + (byteend - bytestart + 1) > length) + osd_printf_error("%s space memory map entry %X-%X extends beyond region '%s' size (%X)\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, entry->m_region, length); + found = true; + } + } + + // error if not found + if (!found) + osd_printf_error("%s space memory map entry %X-%X references non-existant region '%s'\n", spaceconfig->m_name, entry->m_addrstart, entry->m_addrend, entry->m_region); + } + + // make sure all devices exist + // FIXME: This doesn't work! AMH_DEVICE_DELEGATE entries don't even set m_tag, the device tag is inside the proto-delegate + if (entry->m_read.m_type == AMH_DEVICE_DELEGATE && entry->m_read.m_tag != NULL) + { + std::string temp(entry->m_read.m_tag); + if (device().siblingdevice(temp.c_str()) == NULL) + osd_printf_error("%s space memory map entry references nonexistant device '%s'\n", spaceconfig->m_name, entry->m_read.m_tag); + } + if (entry->m_write.m_type == AMH_DEVICE_DELEGATE && entry->m_write.m_tag != NULL) + { + std::string temp(entry->m_write.m_tag); + if (device().siblingdevice(temp.c_str()) == NULL) + osd_printf_error("%s space memory map entry references nonexistant device '%s'\n", spaceconfig->m_name, entry->m_write.m_tag); + } + + // make sure ports exist +// if ((entry->m_read.m_type == AMH_PORT && entry->m_read.m_tag != NULL && portlist.find(entry->m_read.m_tag) == NULL) || +// (entry->m_write.m_type == AMH_PORT && entry->m_write.m_tag != NULL && portlist.find(entry->m_write.m_tag) == NULL)) +// osd_printf_error("%s space memory map entry references nonexistant port tag '%s'\n", spaceconfig->m_name, entry->m_read.m_tag); + + // validate bank and share tags + if (entry->m_read.m_type == AMH_BANK) + valid.validate_tag(entry->m_read.m_tag); + if (entry->m_write.m_type == AMH_BANK) + valid.validate_tag(entry->m_write.m_tag); + if (entry->m_share != NULL) + valid.validate_tag(entry->m_share); + } + + // release the address map + global_free(map); + } + } +} |