48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/*
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* Copyright (C) 2018-2022 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef PAGE_H
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#define PAGE_H
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#include <asm/lib/spinlock.h>
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#include <board_info.h>
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#define PAGE_SHIFT 12U
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#define PAGE_SIZE (1U << PAGE_SHIFT)
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#define PAGE_MASK 0xFFFFFFFFFFFFF000UL
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#define MAX_PHY_ADDRESS_SPACE (1UL << MAXIMUM_PA_WIDTH)
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/* size of the low MMIO address space: 2GB */
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#define PLATFORM_LO_MMIO_SIZE 0x80000000UL
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/* size of the high MMIO address space: 1GB */
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#define PLATFORM_HI_MMIO_SIZE 0x40000000UL
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#define PML4_PAGE_NUM(size) 1UL
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#define PDPT_PAGE_NUM(size) (((size) + PML4E_SIZE - 1UL) >> PML4E_SHIFT)
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#define PD_PAGE_NUM(size) (((size) + PDPTE_SIZE - 1UL) >> PDPTE_SHIFT)
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#define PT_PAGE_NUM(size) (((size) + PDE_SIZE - 1UL) >> PDE_SHIFT)
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struct page {
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uint8_t contents[PAGE_SIZE];
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} __aligned(PAGE_SIZE);
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struct page_pool {
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struct page *start_page;
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spinlock_t lock;
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uint64_t bitmap_size;
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uint64_t *bitmap;
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uint64_t last_hint_id;
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struct page *dummy_page;
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};
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struct page *alloc_page(struct page_pool *pool);
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void free_page(struct page_pool *pool, struct page *page);
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#endif /* PAGE_H */
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