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/*
* Copyright (c) 2017 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* Physical memory layout.
*
* This file is a top header in the inclusion hierarchy, and shouldn't include
* other headers that may cause circular dependencies.
*/
#ifndef X86_PMEM_H
#define X86_PMEM_H
#include <kern/macros.h>
/*
* Zone boundaries.
*/
#define PMEM_DMA_LIMIT DECL_CONST(0x1000000, UL)
#ifdef __LP64__
#define PMEM_MAX_ZONES 4
#define PMEM_DMA32_LIMIT DECL_CONST(0x100000000, UL)
#define PMEM_DIRECTMAP_LIMIT DECL_CONST(0x400000000000, UL)
#define PMEM_HIGHMEM_LIMIT DECL_CONST(0x10000000000000, UL)
#else /* __LP64__ */
#define PMEM_DIRECTMAP_LIMIT DECL_CONST(0x38000000, ULL)
#ifdef CONFIG_X86_PAE
#define PMEM_MAX_ZONES 3
#define PMEM_HIGHMEM_LIMIT DECL_CONST(0x10000000000000, ULL)
#else /* CONFIG_X86_PAE */
#define PMEM_MAX_ZONES 3
#define PMEM_HIGHMEM_LIMIT DECL_CONST(0xfffff000, UL)
#endif /* CONFIG_X86_PAE */
#endif /* __LP64__ */
/*
* Zone vm_page indexes.
*/
#define PMEM_ZONE_DMA 0
#define PMEM_ZONE_DMA32 1
#ifdef __LP64__
#define PMEM_ZONE_DIRECTMAP 2
#define PMEM_ZONE_HIGHMEM 3
#else /* __LP64__ */
#define PMEM_ZONE_DMA32 1
#define PMEM_ZONE_DIRECTMAP 1 /* Alias for the DMA32 zone */
#define PMEM_ZONE_HIGHMEM 2
#endif /* __LP64__ */
#endif /* X86_PMEM_H */
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