mirror of https://github.com/yuzu-emu/yuzu.git
63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "core/hle/kernel/k_page_buffer.h"
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#include "core/hle/kernel/k_session_request.h"
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namespace Kernel {
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Result KSessionRequest::SessionMappings::PushMap(KProcessAddress client, KProcessAddress server,
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size_t size, KMemoryState state, size_t index) {
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// At most 15 buffers of each type (4-bit descriptor counts).
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ASSERT(index < ((1ul << 4) - 1) * 3);
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// Get the mapping.
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Mapping* mapping;
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if (index < NumStaticMappings) {
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mapping = std::addressof(m_static_mappings[index]);
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} else {
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// Allocate a page for the extra mappings.
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if (m_mappings == nullptr) {
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KPageBuffer* page_buffer = KPageBuffer::Allocate(m_kernel);
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R_UNLESS(page_buffer != nullptr, ResultOutOfMemory);
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m_mappings = reinterpret_cast<Mapping*>(page_buffer);
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}
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mapping = std::addressof(m_mappings[index - NumStaticMappings]);
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}
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// Set the mapping.
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mapping->Set(client, server, size, state);
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R_SUCCEED();
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}
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Result KSessionRequest::SessionMappings::PushSend(KProcessAddress client, KProcessAddress server,
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size_t size, KMemoryState state) {
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ASSERT(m_num_recv == 0);
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ASSERT(m_num_exch == 0);
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R_RETURN(this->PushMap(client, server, size, state, m_num_send++));
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}
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Result KSessionRequest::SessionMappings::PushReceive(KProcessAddress client, KProcessAddress server,
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size_t size, KMemoryState state) {
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ASSERT(m_num_exch == 0);
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R_RETURN(this->PushMap(client, server, size, state, m_num_send + m_num_recv++));
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}
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Result KSessionRequest::SessionMappings::PushExchange(KProcessAddress client,
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KProcessAddress server, size_t size,
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KMemoryState state) {
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R_RETURN(this->PushMap(client, server, size, state, m_num_send + m_num_recv + m_num_exch++));
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}
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void KSessionRequest::SessionMappings::Finalize() {
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if (m_mappings) {
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KPageBuffer::Free(m_kernel, reinterpret_cast<KPageBuffer*>(m_mappings));
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m_mappings = nullptr;
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}
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}
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} // namespace Kernel
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