1013de2d6SGuo Ren /* SPDX-License-Identifier: GPL-2.0 */
2013de2d6SGuo Ren
3013de2d6SGuo Ren #ifndef __ASM_CSKY_PGALLOC_H
4013de2d6SGuo Ren #define __ASM_CSKY_PGALLOC_H
5013de2d6SGuo Ren
6013de2d6SGuo Ren #include <linux/highmem.h>
7013de2d6SGuo Ren #include <linux/mm.h>
8013de2d6SGuo Ren #include <linux/sched.h>
9013de2d6SGuo Ren
10bd5ff066SMike Rapoport #define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
11f9cb654cSMike Rapoport #include <asm-generic/pgalloc.h>
12bd5ff066SMike Rapoport
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)13013de2d6SGuo Ren static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
14013de2d6SGuo Ren pte_t *pte)
15013de2d6SGuo Ren {
16013de2d6SGuo Ren set_pmd(pmd, __pmd(__pa(pte)));
17013de2d6SGuo Ren }
18013de2d6SGuo Ren
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t pte)19013de2d6SGuo Ren static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
20013de2d6SGuo Ren pgtable_t pte)
21013de2d6SGuo Ren {
22013de2d6SGuo Ren set_pmd(pmd, __pmd(__pa(page_address(pte))));
23013de2d6SGuo Ren }
24013de2d6SGuo Ren
25013de2d6SGuo Ren extern void pgd_init(unsigned long *p);
26013de2d6SGuo Ren
pte_alloc_one_kernel(struct mm_struct * mm)272a60aa14SGuo Ren static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
28013de2d6SGuo Ren {
29013de2d6SGuo Ren pte_t *pte;
302a60aa14SGuo Ren unsigned long i;
31013de2d6SGuo Ren
322a60aa14SGuo Ren pte = (pte_t *) __get_free_page(GFP_KERNEL);
332a60aa14SGuo Ren if (!pte)
342a60aa14SGuo Ren return NULL;
352a60aa14SGuo Ren
362a60aa14SGuo Ren for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
372a60aa14SGuo Ren (pte + i)->pte_low = _PAGE_GLOBAL;
38013de2d6SGuo Ren
39013de2d6SGuo Ren return pte;
40013de2d6SGuo Ren }
41013de2d6SGuo Ren
pgd_alloc(struct mm_struct * mm)42013de2d6SGuo Ren static inline pgd_t *pgd_alloc(struct mm_struct *mm)
43013de2d6SGuo Ren {
44013de2d6SGuo Ren pgd_t *ret;
45013de2d6SGuo Ren pgd_t *init;
46013de2d6SGuo Ren
47f7536442SMike Rapoport ret = (pgd_t *) __get_free_page(GFP_KERNEL);
48013de2d6SGuo Ren if (ret) {
49013de2d6SGuo Ren init = pgd_offset(&init_mm, 0UL);
50013de2d6SGuo Ren pgd_init((unsigned long *)ret);
51013de2d6SGuo Ren memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
52013de2d6SGuo Ren (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
53013de2d6SGuo Ren /* prevent out of order excute */
54013de2d6SGuo Ren smp_mb();
55013de2d6SGuo Ren #ifdef CONFIG_CPU_NEED_TLBSYNC
56013de2d6SGuo Ren dcache_wb_range((unsigned int)ret,
57013de2d6SGuo Ren (unsigned int)(ret + PTRS_PER_PGD));
58013de2d6SGuo Ren #endif
59013de2d6SGuo Ren }
60013de2d6SGuo Ren
61013de2d6SGuo Ren return ret;
62013de2d6SGuo Ren }
63013de2d6SGuo Ren
64013de2d6SGuo Ren #define __pte_free_tlb(tlb, pte, address) \
65013de2d6SGuo Ren do { \
66*e6473339SVishal Moola (Oracle) pagetable_pte_dtor(page_ptdesc(pte)); \
67*e6473339SVishal Moola (Oracle) tlb_remove_page_ptdesc(tlb, page_ptdesc(pte)); \
68013de2d6SGuo Ren } while (0)
69013de2d6SGuo Ren
70013de2d6SGuo Ren extern void pagetable_init(void);
710c8a32eeSGuo Ren extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
72013de2d6SGuo Ren extern void pre_trap_init(void);
73013de2d6SGuo Ren
74013de2d6SGuo Ren #endif /* __ASM_CSKY_PGALLOC_H */
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