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author AJR <ajrhacker@users.noreply.github.com>2019-01-22 11:35:46 -0500
committer AJR <ajrhacker@users.noreply.github.com>2019-01-22 11:39:32 -0500
commita6f64287a3acbcb6ee629774918407be30807237 (patch)
treeaad4116170e4761c3f76eb2cec7396c0a86ec7dc /src/emu/devfind.cpp
parent8bca61dcd6f0184fce5b82f9c0ed3c5fb2a80d5a (diff)
Add object finder for address spaces
(nw) The constructor and set_tag methods for required_address_space and optional_address_space work slightly differently from other finders in that they take the address space number as an extra argument. There is also an option to request a space having a specific data width, and validation checks this as well as the space number. There is also no (required|optional)_address_space_array, but that shouldn't really be necessary since devices shouldn't need large numbers of these finders.
Diffstat (limited to 'src/emu/devfind.cpp')
-rw-r--r--src/emu/devfind.cpp80
1 files changed, 79 insertions, 1 deletions
diff --git a/src/emu/devfind.cpp b/src/emu/devfind.cpp
index d3cfaf8c0a1..c7d6520875b 100644
--- a/src/emu/devfind.cpp
+++ b/src/emu/devfind.cpp
@@ -22,6 +22,8 @@ template class object_finder_base<memory_bank, false>;
template class object_finder_base<memory_bank, true>;
template class object_finder_base<ioport_port, false>;
template class object_finder_base<ioport_port, true>;
+template class object_finder_base<address_space, false>;
+template class object_finder_base<address_space, true>;
template class object_finder_base<u8, false>;
template class object_finder_base<u8, true>;
@@ -50,6 +52,9 @@ template class memory_bank_finder<true>;
template class ioport_finder<false>;
template class ioport_finder<true>;
+template class address_space_finder<false>;
+template class address_space_finder<true>;
+
template class region_ptr_finder<u8, false>;
template class region_ptr_finder<u8, true>;
template class region_ptr_finder<u16, false>;
@@ -230,6 +235,79 @@ void *finder_base::find_memshare(u8 width, size_t &bytes, bool required) const
//-------------------------------------------------
+// find_addrspace - find address space
+//-------------------------------------------------
+
+address_space *finder_base::find_addrspace(int spacenum, u8 width, bool required) const
+{
+ // look up the device and return nullptr if not found
+ device_t *const device(m_base.get().subdevice(m_tag));
+ if (device == nullptr)
+ return nullptr;
+
+ // check for memory interface and the specified space number
+ const device_memory_interface *memory;
+ if (!device->interface(memory))
+ {
+ if (required)
+ osd_printf_warning("Device '%s' found but lacks memory interface\n", m_tag);
+ return nullptr;
+ }
+ if (!memory->has_space(spacenum))
+ {
+ if (required)
+ osd_printf_warning("Device '%s' found but lacks address space #%d\n", m_tag, spacenum);
+ return nullptr;
+ }
+
+ // check data width
+ address_space &space(memory->space(spacenum));
+ if (width != 0 && width != space.data_width())
+ {
+ if (required)
+ osd_printf_warning("Device '%s' found but address space #%d has the wrong data width (expected %d, found %d)\n", m_tag, spacenum, width, space.data_width());
+ return nullptr;
+ }
+
+ // return result
+ return &space;
+}
+
+
+//-------------------------------------------------
+// validate_addrspace - find address space
+//-------------------------------------------------
+
+bool finder_base::validate_addrspace(int spacenum, u8 width, bool required) const
+{
+ // look up the device and return false if not found
+ device_t *const device(m_base.get().subdevice(m_tag));
+ if (device == nullptr)
+ return report_missing(false, "address space", required);
+
+ // check for memory interface and a configuration for the designated space
+ const device_memory_interface *memory = nullptr;
+ const address_space_config *config = nullptr;
+ if (device->interface(memory))
+ {
+ config = memory->space_config(spacenum);
+ if (required)
+ {
+ if (config == nullptr)
+ osd_printf_warning("Device '%s' found but lacks address space #%d\n", m_tag, spacenum);
+ else if (width != 0 && width != config->data_width())
+ osd_printf_warning("Device '%s' found but space #%d has the wrong data width (expected %d, found %d)\n", m_tag, spacenum, width, config->data_width());
+ }
+ }
+ else if (required)
+ osd_printf_warning("Device '%s' found but lacks memory interface\n", m_tag);
+
+ // report result
+ return report_missing(config != nullptr && (width == 0 || width == config->data_width()), "address space", required);
+}
+
+
+//-------------------------------------------------
// report_missing - report missing objects and
// return true if it's ok
//-------------------------------------------------
@@ -240,7 +318,7 @@ bool finder_base::report_missing(bool found, const char *objname, bool required)
{
osd_printf_error("Tag not defined for required %s\n", objname);
return false;
- }
+ }
// just pass through in the found case
if (found)