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On hw, `Page_flags` is used throughout architectures. At the same time, it is used by the Intel IOMMU page table implementation in the pc platform driver. Consolidate the definition in base so it is available for all users. Issue #5217
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* \brief Generic page flags
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* \author Stefan Kalkowski
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* \date 2014-02-24
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*/
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/*
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* Copyright (C) 2014-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__CPU__PAGE_FLAGS_H_
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#define _INCLUDE__CPU__PAGE_FLAGS_H_
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#include <base/cache.h>
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#include <base/output.h>
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namespace Genode {
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enum Writeable { RO, RW };
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enum Executeable { NO_EXEC, EXEC };
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enum Privileged { USER, KERN };
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enum Global { NO_GLOBAL, GLOBAL };
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enum Type { RAM, DEVICE };
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struct Page_flags;
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}
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struct Genode::Page_flags
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{
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Writeable writeable;
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Executeable executable;
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Privileged privileged;
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Global global;
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Type type;
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Genode::Cache cacheable;
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void print(Genode::Output & out) const
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{
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using Genode::print;
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using namespace Genode;
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print(out, (writeable == RW) ? "writeable, " : "readonly, ",
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(executable ==EXEC) ? "exec, " : "noexec, ");
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if (privileged == KERN) print(out, "privileged, ");
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if (global == GLOBAL) print(out, "global, ");
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if (type == DEVICE) print(out, "iomem, ");
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switch (cacheable) {
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case UNCACHED: print(out, "uncached"); break;
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case CACHED: print(out, "cached"); break;
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case WRITE_COMBINED: print(out, "write-combined"); break;
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};
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}
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};
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namespace Genode {
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static constexpr Page_flags PAGE_FLAGS_KERN_IO
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{ RW, NO_EXEC, KERN, GLOBAL, DEVICE, Genode::UNCACHED };
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static constexpr Page_flags PAGE_FLAGS_KERN_DATA
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{ RW, EXEC, KERN, GLOBAL, RAM, Genode::CACHED };
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static constexpr Page_flags PAGE_FLAGS_KERN_TEXT
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{ RW, EXEC, KERN, GLOBAL, RAM, Genode::CACHED };
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static constexpr Page_flags PAGE_FLAGS_KERN_EXCEP
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{ RW, EXEC, KERN, GLOBAL, RAM, Genode::CACHED };
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static constexpr Page_flags PAGE_FLAGS_UTCB
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{ RW, NO_EXEC, USER, NO_GLOBAL, RAM, Genode::CACHED };
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}
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#endif /* _INCLUDE__CPU__PAGE_FLAGS_H_ */
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