waterDataFluctuationCorrelation hiddenDangerAnalysis.h 张婷 commit at 2020-10-10

waterDataFluctuationCorrelation/fluctuationCorrelationOfFireHydrant/hiddenDangerAnalysis.h

@@ -0,0 +1,121 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 2003 Ralf Baechle
+ * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PGTABLE_64_H
+#define _ASM_PGTABLE_64_H
+
+#include <linux/compiler.h>
+#include <linux/linkage.h>
+
+#include <asm/addrspace.h>
+#include <asm/page.h>
+#include <asm/cachectl.h>
+#include <asm/fixmap.h>
+
+#ifdef CONFIG_PAGE_SIZE_64KB
+#include <asm-generic/pgtable-nopmd.h>
+#else
+#include <asm-generic/pgtable-nopud.h>
+#endif
+
+/*
+ * Each address space has 2 4K pages as its page directory, giving 1024
+ * (== PTRS_PER_PGD) 8 byte pointers to pmd tables. Each pmd table is a
+ * single 4K page, giving 512 (== PTRS_PER_PMD) 8 byte pointers to page
+ * tables. Each page table is also a single 4K page, giving 512 (==
+ * PTRS_PER_PTE) 8 byte ptes. Each pud entry is initialized to point to
+ * invalid_pmd_table, each pmd entry is initialized to point to
+ * invalid_pte_table, each pte is initialized to 0. When memory is low,
+ * and a pmd table or a page table allocation fails, empty_bad_pmd_table
+ * and empty_bad_page_table is returned back to higher layer code, so
+ * that the failure is recognized later on. Linux does not seem to
+ * handle these failures very well though. The empty_bad_page_table has
+ * invalid pte entries in it, to force page faults.
+ *
+ * Kernel mappings: kernel mappings are held in the swapper_pg_table.
+ * The layout is identical to userspace except it's indexed with the
+ * fault address - VMALLOC_START.
+ */
+
+
+/* PGDIR_SHIFT determines what a third-level page table entry can map */
+#ifdef __PAGETABLE_PMD_FOLDED
+#define PGDIR_SHIFT	(PAGE_SHIFT + PAGE_SHIFT + PTE_ORDER - 3)
+#else
+
+/* PMD_SHIFT determines the size of the area a second-level page table can map */
+#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 3))
+#define PMD_SIZE	(1UL << PMD_SHIFT)
+#define PMD_MASK	(~(PMD_SIZE-1))
+
+
+#define PGDIR_SHIFT	(PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
+#endif
+#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
+#define PGDIR_MASK	(~(PGDIR_SIZE-1))
+
+/*
+ * For 4kB page size we use a 3 level page tree and an 8kB pud, which
+ * permits us mapping 40 bits of virtual address space.
+ *
+ * We used to implement 41 bits by having an order 1 pmd level but that seemed
+ * rather pointless.
+ *
+ * For 8kB page size we use a 3 level page tree which permits a total of
+ * 8TB of address space.  Alternatively a 33-bit / 8GB organization using
+ * two levels would be easy to implement.
+ *
+ * For 16kB page size we use a 2 level page tree which permits a total of
+ * 36 bits of virtual address space.  We could add a third level but it seems
+ * like at the moment there's no need for this.
+ *
+ * For 64kB page size we use a 2 level page table tree for a total of 42 bits
+ * of virtual address space.
+ */
+#ifdef CONFIG_PAGE_SIZE_4KB
+#define PGD_ORDER		1
+#define PUD_ORDER		aieeee_attempt_to_allocate_pud
+#define PMD_ORDER		0
+#define PTE_ORDER		0
+#endif
+#ifdef CONFIG_PAGE_SIZE_8KB
+#define PGD_ORDER		0
+#define PUD_ORDER		aieeee_attempt_to_allocate_pud
+#define PMD_ORDER		0
+#define PTE_ORDER		0
+#endif
+#ifdef CONFIG_PAGE_SIZE_16KB
+#define PGD_ORDER		0
+#define PUD_ORDER		aieeee_attempt_to_allocate_pud
+#define PMD_ORDER		0
+#define PTE_ORDER		0
+#endif
+#ifdef CONFIG_PAGE_SIZE_32KB
+#define PGD_ORDER		0
+#define PUD_ORDER		aieeee_attempt_to_allocate_pud
+#define PMD_ORDER		0
+#define PTE_ORDER		0
+#endif
+#ifdef CONFIG_PAGE_SIZE_64KB
+#define PGD_ORDER		0
+#define PUD_ORDER		aieeee_attempt_to_allocate_pud
+#define PMD_ORDER		aieeee_attempt_to_allocate_pmd
+#define PTE_ORDER		0
+#endif
+
+#define PTRS_PER_PGD	((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))
+#ifndef __PAGETABLE_PMD_FOLDED
+#define PTRS_PER_PMD	((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t))
+#endif
+#define PTRS_PER_PTE	((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
+
+#if PGDIR_SIZE >= TASK_SIZE64
+#define USER_PTRS_PER_PGD       (1)
+#else
+#define USER_PTRS_PER_PGD	(TASK_SIZE64 / PGDIR_SIZE)
+#endif