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
 
 
25extern void pgd_init(unsigned long *p);
26
27static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
28{
29	pte_t *pte;
30	unsigned long i;
31
32	pte = (pte_t *) __get_free_page(GFP_KERNEL);
33	if (!pte)
34		return NULL;
35
36	for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
37		(pte + i)->pte_low = _PAGE_GLOBAL;
38
39	return pte;
40}
41
 
 
 
 
 
42static inline pgd_t *pgd_alloc(struct mm_struct *mm)
43{
44	pgd_t *ret;
45	pgd_t *init;
46
47	ret = (pgd_t *) __get_free_page(GFP_KERNEL);
48	if (ret) {
49		init = pgd_offset(&init_mm, 0UL);
50		pgd_init((unsigned long *)ret);
51		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
52			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
53		/* prevent out of order excute */
54		smp_mb();
55#ifdef CONFIG_CPU_NEED_TLBSYNC
56		dcache_wb_range((unsigned int)ret,
57				(unsigned int)(ret + PTRS_PER_PGD));
58#endif
59	}
60
61	return ret;
62}
63
64#define __pte_free_tlb(tlb, pte, address)		\
65do {							\
66	pgtable_pte_page_dtor(pte);			\
67	tlb_remove_page(tlb, pte);			\
68} while (0)
69
70extern void pagetable_init(void);
71extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
72extern void pre_trap_init(void);
73
74#endif /* __ASM_CSKY_PGALLOC_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
 3
 4#ifndef __ASM_CSKY_PGALLOC_H
 5#define __ASM_CSKY_PGALLOC_H
 6
 7#include <linux/highmem.h>
 8#include <linux/mm.h>
 9#include <linux/sched.h>
10
11#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
12#include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
13
14static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
15					pte_t *pte)
16{
17	set_pmd(pmd, __pmd(__pa(pte)));
18}
19
20static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
21					pgtable_t pte)
22{
23	set_pmd(pmd, __pmd(__pa(page_address(pte))));
24}
25
26#define pmd_pgtable(pmd) pmd_page(pmd)
27
28extern void pgd_init(unsigned long *p);
29
30static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
31{
32	pte_t *pte;
33	unsigned long i;
34
35	pte = (pte_t *) __get_free_page(GFP_KERNEL);
36	if (!pte)
37		return NULL;
38
39	for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
40		(pte + i)->pte_low = _PAGE_GLOBAL;
41
42	return pte;
43}
44
45static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
46{
47	free_pages((unsigned long)pgd, PGD_ORDER);
48}
49
50static inline pgd_t *pgd_alloc(struct mm_struct *mm)
51{
52	pgd_t *ret;
53	pgd_t *init;
54
55	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
56	if (ret) {
57		init = pgd_offset(&init_mm, 0UL);
58		pgd_init((unsigned long *)ret);
59		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
60			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
61		/* prevent out of order excute */
62		smp_mb();
63#ifdef CONFIG_CPU_NEED_TLBSYNC
64		dcache_wb_range((unsigned int)ret,
65				(unsigned int)(ret + PTRS_PER_PGD));
66#endif
67	}
68
69	return ret;
70}
71
72#define __pte_free_tlb(tlb, pte, address)		\
73do {							\
74	pgtable_pte_page_dtor(pte);			\
75	tlb_remove_page(tlb, pte);			\
76} while (0)
77
78extern void pagetable_init(void);
79extern void pre_mmu_init(void);
80extern void pre_trap_init(void);
81
82#endif /* __ASM_CSKY_PGALLOC_H */