Zack Buhman
511d99563d
From the GCC manual.
> GCC permits a C structure to have no members:
struct empty {
};
> The structure has size zero. In C++, empty structures are part of the
> language. G++ treats empty structures as if they had a single member of type
> char.
I was not aware of the different behavior in C++.
This fixes every maple example--most were broken for multiple reasons, including
this one.
This also enables SH4 caching. This includes linking code/data into the P1
area (previously this was not the case).
The maple examples (which indeed involve much use of DMA) require much work to
successfully work with the operand and copyback caches. The vibration example
currently is the most complete, though I should consider more on how I want to
structure maple response operand cache invalidation more generally.
82 lines
3.9 KiB
C++
82 lines
3.9 KiB
C++
#pragma once
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#include <cstdint>
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#include "maple/maple.hpp"
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#include "maple/maple_bus_commands.hpp"
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#include "maple/maple_bus_bits.hpp"
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namespace maple {
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template <typename C, typename R>
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uint32_t init_host_command_all_ports(uint32_t * command_buf, uint32_t * receive_buf,
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const typename C::data_fields& data_fields)
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{
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using command_type = maple::host_command<typename C::data_fields>;
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using response_type = maple::command_response<typename R::data_fields>;
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auto host_command = reinterpret_cast<command_type *>(command_buf);
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auto response_command = reinterpret_cast<response_type *>(receive_buf);
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init_host_command((uint32_t*)&host_command[0], (uint32_t*)&response_command[0],
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host_instruction::port_select::a, // destination_port
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ap::de::device | ap::port_select::a, C::command_code, (sizeof (typename C::data_fields)),
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false); // end_flag
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host_command[0].bus_data.data_fields = data_fields;
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init_host_command((uint32_t*)&host_command[1], (uint32_t*)&response_command[1],
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host_instruction::port_select::b, // destination_port
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ap::de::device | ap::port_select::b, C::command_code, (sizeof (typename C::data_fields)),
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false); // end_flag
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host_command[1].bus_data.data_fields = data_fields;
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init_host_command((uint32_t*)&host_command[2], (uint32_t*)&response_command[2],
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host_instruction::port_select::c, // destination_port
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ap::de::device | ap::port_select::c, C::command_code, (sizeof (typename C::data_fields)),
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false); // end_flag
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host_command[2].bus_data.data_fields = data_fields;
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init_host_command((uint32_t*)&host_command[3], (uint32_t*)&response_command[3],
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host_instruction::port_select::d, // destination_port
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ap::de::device | ap::port_select::d, C::command_code, (sizeof (typename C::data_fields)),
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true); // end_flag
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host_command[3].bus_data.data_fields = data_fields;
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return reinterpret_cast<uint32_t>(&host_command[4]) - reinterpret_cast<uint32_t>(&host_command[0]);
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}
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template <typename C, typename R>
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uint32_t init_host_command_all_ports(uint32_t * command_buf, uint32_t * receive_buf)
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{
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using command_type = maple::host_command<typename C::data_fields>;
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using response_type = maple::command_response<typename R::data_fields>;
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//static_assert((sizeof (command_type)) == 12);
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auto host_command = reinterpret_cast<command_type *>(command_buf);
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auto response_command = reinterpret_cast<response_type *>(receive_buf);
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init_host_command((uint32_t*)&host_command[0], (uint32_t*)&response_command[0],
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host_instruction::port_select::a, // destination_port
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ap::de::device | ap::port_select::a, C::command_code, (sizeof (typename C::data_fields)),
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false); // end_flag
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init_host_command((uint32_t*)&host_command[1], (uint32_t*)&response_command[1],
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host_instruction::port_select::b, // destination_port
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ap::de::device | ap::port_select::b, C::command_code, (sizeof (typename C::data_fields)),
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false); // end_flag
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init_host_command((uint32_t*)&host_command[2], (uint32_t*)&response_command[2],
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host_instruction::port_select::c, // destination_port
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ap::de::device | ap::port_select::c, C::command_code, (sizeof (typename C::data_fields)),
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false); // end_flag
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init_host_command((uint32_t*)&host_command[3], (uint32_t*)&response_command[3],
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host_instruction::port_select::d, // destination_port
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ap::de::device | ap::port_select::d, C::command_code, (sizeof (typename C::data_fields)),
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true); // end_flag
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return reinterpret_cast<uint32_t>(&host_command[1]) - reinterpret_cast<uint32_t>(&host_command[0]);
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}
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}
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