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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/arch/microblaze/include/asm/pgalloc.h
....@@ -1,11 +1,8 @@
1
+/* SPDX-License-Identifier: GPL-2.0 */
12 /*
23  * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
34  * Copyright (C) 2008-2009 PetaLogix
45  * Copyright (C) 2006 Atmark Techno, Inc.
5
- *
6
- * This file is subject to the terms and conditions of the GNU General Public
7
- * License. See the file "COPYING" in the main directory of this archive
8
- * for more details.
96  */
107 
118 #ifndef _ASM_MICROBLAZE_PGALLOC_H
....@@ -15,159 +12,27 @@
1512 
1613 #include <linux/kernel.h>	/* For min/max macros */
1714 #include <linux/highmem.h>
15
+#include <linux/pgtable.h>
1816 #include <asm/setup.h>
1917 #include <asm/io.h>
2018 #include <asm/page.h>
2119 #include <asm/cache.h>
22
-#include <asm/pgtable.h>
2320 
24
-#define PGDIR_ORDER	0
25
-
26
-/*
27
- * This is handled very differently on MicroBlaze since out page tables
28
- * are all 0's and I want to be able to use these zero'd pages elsewhere
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- * as well - it gives us quite a speedup.
30
- * -- Cort
31
- */
32
-extern struct pgtable_cache_struct {
33
-	unsigned long *pgd_cache;
34
-	unsigned long *pte_cache;
35
-	unsigned long pgtable_cache_sz;
36
-} quicklists;
37
-
38
-#define pgd_quicklist		(quicklists.pgd_cache)
39
-#define pmd_quicklist		((unsigned long *)0)
40
-#define pte_quicklist		(quicklists.pte_cache)
41
-#define pgtable_cache_size	(quicklists.pgtable_cache_sz)
42
-
43
-extern unsigned long *zero_cache; /* head linked list of pre-zero'd pages */
44
-extern atomic_t zero_sz; /* # currently pre-zero'd pages */
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-extern atomic_t zeropage_hits; /* # zero'd pages request that we've done */
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-extern atomic_t zeropage_calls; /* # zero'd pages request that've been made */
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-extern atomic_t zerototal; /* # pages zero'd over time */
48
-
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-#define zero_quicklist		(zero_cache)
50
-#define zero_cache_sz	 	(zero_sz)
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-#define zero_cache_calls	(zeropage_calls)
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-#define zero_cache_hits		(zeropage_hits)
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-#define zero_cache_total	(zerototal)
54
-
55
-/*
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- * return a pre-zero'd page from the list,
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- * return NULL if none available -- Cort
58
- */
59
-extern unsigned long get_zero_page_fast(void);
21
+#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
22
+#include <asm-generic/pgalloc.h>
6023 
6124 extern void __bad_pte(pmd_t *pmd);
6225 
63
-static inline pgd_t *get_pgd_slow(void)
26
+static inline pgd_t *get_pgd(void)
6427 {
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-	pgd_t *ret;
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-
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-	ret = (pgd_t *)__get_free_pages(GFP_KERNEL, PGDIR_ORDER);
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-	if (ret != NULL)
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-		clear_page(ret);
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-	return ret;
28
+	return (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, 0);
7129 }
7230 
73
-static inline pgd_t *get_pgd_fast(void)
74
-{
75
-	unsigned long *ret;
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-
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-	ret = pgd_quicklist;
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-	if (ret != NULL) {
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-		pgd_quicklist = (unsigned long *)(*ret);
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-		ret[0] = 0;
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-		pgtable_cache_size--;
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-	} else
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-		ret = (unsigned long *)get_pgd_slow();
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-	return (pgd_t *)ret;
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-}
86
-
87
-static inline void free_pgd_fast(pgd_t *pgd)
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-{
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-	*(unsigned long **)pgd = pgd_quicklist;
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-	pgd_quicklist = (unsigned long *) pgd;
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-	pgtable_cache_size++;
92
-}
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-
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-static inline void free_pgd_slow(pgd_t *pgd)
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-{
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-	free_page((unsigned long)pgd);
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-}
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-
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-#define pgd_free(mm, pgd)        free_pgd_fast(pgd)
100
-#define pgd_alloc(mm)		get_pgd_fast()
31
+#define pgd_alloc(mm)		get_pgd()
10132 
10233 #define pmd_pgtable(pmd)	pmd_page(pmd)
10334 
104
-/*
105
- * We don't have any real pmd's, and this code never triggers because
106
- * the pgd will always be present..
107
- */
108
-#define pmd_alloc_one_fast(mm, address)	({ BUG(); ((pmd_t *)1); })
109
-#define pmd_alloc_one(mm, address)	({ BUG(); ((pmd_t *)2); })
110
-
111
-extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
112
-
113
-static inline struct page *pte_alloc_one(struct mm_struct *mm,
114
-		unsigned long address)
115
-{
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-	struct page *ptepage;
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-
118
-#ifdef CONFIG_HIGHPTE
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-	int flags = GFP_KERNEL | __GFP_HIGHMEM;
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-#else
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-	int flags = GFP_KERNEL;
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-#endif
123
-
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-	ptepage = alloc_pages(flags, 0);
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-	if (!ptepage)
126
-		return NULL;
127
-	clear_highpage(ptepage);
128
-	if (!pgtable_page_ctor(ptepage)) {
129
-		__free_page(ptepage);
130
-		return NULL;
131
-	}
132
-	return ptepage;
133
-}
134
-
135
-static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm,
136
-		unsigned long address)
137
-{
138
-	unsigned long *ret;
139
-
140
-	ret = pte_quicklist;
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-	if (ret != NULL) {
142
-		pte_quicklist = (unsigned long *)(*ret);
143
-		ret[0] = 0;
144
-		pgtable_cache_size--;
145
-	}
146
-	return (pte_t *)ret;
147
-}
148
-
149
-static inline void pte_free_fast(pte_t *pte)
150
-{
151
-	*(unsigned long **)pte = pte_quicklist;
152
-	pte_quicklist = (unsigned long *) pte;
153
-	pgtable_cache_size++;
154
-}
155
-
156
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
157
-{
158
-	free_page((unsigned long)pte);
159
-}
160
-
161
-static inline void pte_free_slow(struct page *ptepage)
162
-{
163
-	__free_page(ptepage);
164
-}
165
-
166
-static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
167
-{
168
-	pgtable_page_dtor(ptepage);
169
-	__free_page(ptepage);
170
-}
35
+extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
17136 
17237 #define __pte_free_tlb(tlb, pte, addr)	pte_free((tlb)->mm, (pte))
17338 
....@@ -177,19 +42,6 @@
17742 #define pmd_populate_kernel(mm, pmd, pte) \
17843 		(pmd_val(*(pmd)) = (unsigned long) (pte))
17944 
180
-/*
181
- * We don't have any real pmd's, and this code never triggers because
182
- * the pgd will always be present..
183
- */
184
-#define pmd_alloc_one(mm, address)	({ BUG(); ((pmd_t *)2); })
185
-#define pmd_free(mm, x)			do { } while (0)
186
-#define __pmd_free_tlb(tlb, x, addr)	pmd_free((tlb)->mm, x)
187
-#define pgd_populate(mm, pmd, pte)	BUG()
188
-
189
-extern int do_check_pgt_cache(int, int);
190
-
19145 #endif /* CONFIG_MMU */
192
-
193
-#define check_pgt_cache()		do { } while (0)
19446 
19547 #endif /* _ASM_MICROBLAZE_PGALLOC_H */