From 1c4c7f88056f50987a5a4d40016d6e32dc5a0205 Mon Sep 17 00:00:00 2001 From: sigsegv7 Date: Wed, 11 Oct 2023 16:39:05 -0400 Subject: kernel: vm: Add PMAP abstraction Signed-off-by: sigsegv7 --- sys/include/arch/amd64/vas.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 sys/include/arch/amd64/vas.h (limited to 'sys/include/arch/amd64') diff --git a/sys/include/arch/amd64/vas.h b/sys/include/arch/amd64/vas.h new file mode 100644 index 0000000..8284e8f --- /dev/null +++ b/sys/include/arch/amd64/vas.h @@ -0,0 +1,43 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of VegaOS nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _AMD64_PMAP_H_ +#define _AMD64_PMAP_H_ + +#include +#include + +struct vas { + size_t cr3_flags; /* CR3 flags */ + uintptr_t top_level; /* PML5 if `use_l5_paging' true, otherwise PML4 */ + bool use_l5_paging; /* True if 5-level paging is supported */ + struct spinlock lock; +}; + +#endif /* !_AMD64_PMAP_H_ */ -- cgit v1.2.3