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