1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef __ASM_CSKY_PGALLOC_H
4 #define __ASM_CSKY_PGALLOC_H
6 #include <linux/highmem.h>
8 #include <linux/sched.h>
10 #define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
11 #include <asm-generic/pgalloc.h>
13 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
16 set_pmd(pmd, __pmd(__pa(pte)));
19 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
22 set_pmd(pmd, __pmd(__pa(page_address(pte))));
25 extern void pgd_init(unsigned long *p);
27 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
32 pte = (pte_t *) __get_free_page(GFP_KERNEL);
36 for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
37 (pte + i)->pte_low = _PAGE_GLOBAL;
42 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
47 ret = (pgd_t *) __get_free_page(GFP_KERNEL);
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 */
55 #ifdef CONFIG_CPU_NEED_TLBSYNC
56 dcache_wb_range((unsigned int)ret,
57 (unsigned int)(ret + PTRS_PER_PGD));
64 #define __pte_free_tlb(tlb, pte, address) \
66 pgtable_pte_page_dtor(pte); \
67 tlb_remove_page(tlb, pte); \
70 extern void pagetable_init(void);
71 extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
72 extern void pre_trap_init(void);
74 #endif /* __ASM_CSKY_PGALLOC_H */