Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_CSKY_PGALLOC_H
4#define __ASM_CSKY_PGALLOC_H
5
6#include <linux/highmem.h>
7#include <linux/mm.h>
8#include <linux/sched.h>
9
10#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
11#include <asm-generic/pgalloc.h>
12
13static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
14 pte_t *pte)
15{
16 set_pmd(pmd, __pmd(__pa(pte)));
17}
18
19static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
20 pgtable_t pte)
21{
22 set_pmd(pmd, __pmd(__pa(page_address(pte))));
23}
24
25#define pmd_pgtable(pmd) pmd_page(pmd)
26
27extern void pgd_init(unsigned long *p);
28
29static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
30{
31 pte_t *pte;
32 unsigned long i;
33
34 pte = (pte_t *) __get_free_page(GFP_KERNEL);
35 if (!pte)
36 return NULL;
37
38 for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
39 (pte + i)->pte_low = _PAGE_GLOBAL;
40
41 return pte;
42}
43
44static inline pgd_t *pgd_alloc(struct mm_struct *mm)
45{
46 pgd_t *ret;
47 pgd_t *init;
48
49 ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
50 if (ret) {
51 init = pgd_offset(&init_mm, 0UL);
52 pgd_init((unsigned long *)ret);
53 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
54 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
55 /* prevent out of order excute */
56 smp_mb();
57#ifdef CONFIG_CPU_NEED_TLBSYNC
58 dcache_wb_range((unsigned int)ret,
59 (unsigned int)(ret + PTRS_PER_PGD));
60#endif
61 }
62
63 return ret;
64}
65
66#define __pte_free_tlb(tlb, pte, address) \
67do { \
68 pgtable_pte_page_dtor(pte); \
69 tlb_remove_page(tlb, pte); \
70} while (0)
71
72extern void pagetable_init(void);
73extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
74extern void pre_trap_init(void);
75
76#endif /* __ASM_CSKY_PGALLOC_H */