175a9b8a6SAneesh Kumar K.V #ifndef _ASM_POWERPC_PGALLOC_64_H 275a9b8a6SAneesh Kumar K.V #define _ASM_POWERPC_PGALLOC_64_H 375a9b8a6SAneesh Kumar K.V /* 475a9b8a6SAneesh Kumar K.V * This program is free software; you can redistribute it and/or 575a9b8a6SAneesh Kumar K.V * modify it under the terms of the GNU General Public License 675a9b8a6SAneesh Kumar K.V * as published by the Free Software Foundation; either version 775a9b8a6SAneesh Kumar K.V * 2 of the License, or (at your option) any later version. 875a9b8a6SAneesh Kumar K.V */ 975a9b8a6SAneesh Kumar K.V 1075a9b8a6SAneesh Kumar K.V #include <linux/slab.h> 1175a9b8a6SAneesh Kumar K.V #include <linux/cpumask.h> 1275a9b8a6SAneesh Kumar K.V #include <linux/percpu.h> 1375a9b8a6SAneesh Kumar K.V 1475a9b8a6SAneesh Kumar K.V struct vmemmap_backing { 1575a9b8a6SAneesh Kumar K.V struct vmemmap_backing *list; 1675a9b8a6SAneesh Kumar K.V unsigned long phys; 1775a9b8a6SAneesh Kumar K.V unsigned long virt_addr; 1875a9b8a6SAneesh Kumar K.V }; 1975a9b8a6SAneesh Kumar K.V extern struct vmemmap_backing *vmemmap_list; 2075a9b8a6SAneesh Kumar K.V 2175a9b8a6SAneesh Kumar K.V /* 2275a9b8a6SAneesh Kumar K.V * Functions that deal with pagetables that could be at any level of 2375a9b8a6SAneesh Kumar K.V * the table need to be passed an "index_size" so they know how to 2475a9b8a6SAneesh Kumar K.V * handle allocation. For PTE pages (which are linked to a struct 2575a9b8a6SAneesh Kumar K.V * page for now, and drawn from the main get_free_pages() pool), the 2675a9b8a6SAneesh Kumar K.V * allocation size will be (2^index_size * sizeof(pointer)) and 2775a9b8a6SAneesh Kumar K.V * allocations are drawn from the kmem_cache in PGT_CACHE(index_size). 2875a9b8a6SAneesh Kumar K.V * 2975a9b8a6SAneesh Kumar K.V * The maximum index size needs to be big enough to allow any 3075a9b8a6SAneesh Kumar K.V * pagetable sizes we need, but small enough to fit in the low bits of 3175a9b8a6SAneesh Kumar K.V * any page table pointer. In other words all pagetables, even tiny 3275a9b8a6SAneesh Kumar K.V * ones, must be aligned to allow at least enough low 0 bits to 3375a9b8a6SAneesh Kumar K.V * contain this value. This value is also used as a mask, so it must 3475a9b8a6SAneesh Kumar K.V * be one less than a power of two. 3575a9b8a6SAneesh Kumar K.V */ 3675a9b8a6SAneesh Kumar K.V #define MAX_PGTABLE_INDEX_SIZE 0xf 3775a9b8a6SAneesh Kumar K.V 3875a9b8a6SAneesh Kumar K.V extern struct kmem_cache *pgtable_cache[]; 3975a9b8a6SAneesh Kumar K.V #define PGT_CACHE(shift) ({ \ 4075a9b8a6SAneesh Kumar K.V BUG_ON(!(shift)); \ 4175a9b8a6SAneesh Kumar K.V pgtable_cache[(shift) - 1]; \ 4275a9b8a6SAneesh Kumar K.V }) 4375a9b8a6SAneesh Kumar K.V 4475a9b8a6SAneesh Kumar K.V static inline pgd_t *pgd_alloc(struct mm_struct *mm) 4575a9b8a6SAneesh Kumar K.V { 4675a9b8a6SAneesh Kumar K.V return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL); 4775a9b8a6SAneesh Kumar K.V } 4875a9b8a6SAneesh Kumar K.V 4975a9b8a6SAneesh Kumar K.V static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 5075a9b8a6SAneesh Kumar K.V { 5175a9b8a6SAneesh Kumar K.V kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); 5275a9b8a6SAneesh Kumar K.V } 5375a9b8a6SAneesh Kumar K.V 5475a9b8a6SAneesh Kumar K.V #ifndef CONFIG_PPC_64K_PAGES 5575a9b8a6SAneesh Kumar K.V 5675a9b8a6SAneesh Kumar K.V #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, __pgtable_ptr_val(PUD)) 5775a9b8a6SAneesh Kumar K.V 5875a9b8a6SAneesh Kumar K.V static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 5975a9b8a6SAneesh Kumar K.V { 6075a9b8a6SAneesh Kumar K.V return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), 6175a9b8a6SAneesh Kumar K.V GFP_KERNEL|__GFP_REPEAT); 6275a9b8a6SAneesh Kumar K.V } 6375a9b8a6SAneesh Kumar K.V 6475a9b8a6SAneesh Kumar K.V static inline void pud_free(struct mm_struct *mm, pud_t *pud) 6575a9b8a6SAneesh Kumar K.V { 6675a9b8a6SAneesh Kumar K.V kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud); 6775a9b8a6SAneesh Kumar K.V } 6875a9b8a6SAneesh Kumar K.V 6975a9b8a6SAneesh Kumar K.V static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 7075a9b8a6SAneesh Kumar K.V { 7175a9b8a6SAneesh Kumar K.V pud_set(pud, __pgtable_ptr_val(pmd)); 7275a9b8a6SAneesh Kumar K.V } 7375a9b8a6SAneesh Kumar K.V 7475a9b8a6SAneesh Kumar K.V static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 7575a9b8a6SAneesh Kumar K.V pte_t *pte) 7675a9b8a6SAneesh Kumar K.V { 7775a9b8a6SAneesh Kumar K.V pmd_set(pmd, __pgtable_ptr_val(pte)); 7875a9b8a6SAneesh Kumar K.V } 7975a9b8a6SAneesh Kumar K.V 8075a9b8a6SAneesh Kumar K.V static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 8175a9b8a6SAneesh Kumar K.V pgtable_t pte_page) 8275a9b8a6SAneesh Kumar K.V { 8375a9b8a6SAneesh Kumar K.V pmd_set(pmd, __pgtable_ptr_val(page_address(pte_page))); 8475a9b8a6SAneesh Kumar K.V } 8575a9b8a6SAneesh Kumar K.V 8675a9b8a6SAneesh Kumar K.V #define pmd_pgtable(pmd) pmd_page(pmd) 8775a9b8a6SAneesh Kumar K.V 8875a9b8a6SAneesh Kumar K.V static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 8975a9b8a6SAneesh Kumar K.V unsigned long address) 9075a9b8a6SAneesh Kumar K.V { 9175a9b8a6SAneesh Kumar K.V return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); 9275a9b8a6SAneesh Kumar K.V } 9375a9b8a6SAneesh Kumar K.V 9475a9b8a6SAneesh Kumar K.V static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 9575a9b8a6SAneesh Kumar K.V unsigned long address) 9675a9b8a6SAneesh Kumar K.V { 9775a9b8a6SAneesh Kumar K.V struct page *page; 9875a9b8a6SAneesh Kumar K.V pte_t *pte; 9975a9b8a6SAneesh Kumar K.V 10075a9b8a6SAneesh Kumar K.V pte = pte_alloc_one_kernel(mm, address); 10175a9b8a6SAneesh Kumar K.V if (!pte) 10275a9b8a6SAneesh Kumar K.V return NULL; 10375a9b8a6SAneesh Kumar K.V page = virt_to_page(pte); 10475a9b8a6SAneesh Kumar K.V if (!pgtable_page_ctor(page)) { 10575a9b8a6SAneesh Kumar K.V __free_page(page); 10675a9b8a6SAneesh Kumar K.V return NULL; 10775a9b8a6SAneesh Kumar K.V } 10875a9b8a6SAneesh Kumar K.V return page; 10975a9b8a6SAneesh Kumar K.V } 11075a9b8a6SAneesh Kumar K.V 11175a9b8a6SAneesh Kumar K.V static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 11275a9b8a6SAneesh Kumar K.V { 11375a9b8a6SAneesh Kumar K.V free_page((unsigned long)pte); 11475a9b8a6SAneesh Kumar K.V } 11575a9b8a6SAneesh Kumar K.V 11675a9b8a6SAneesh Kumar K.V static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) 11775a9b8a6SAneesh Kumar K.V { 11875a9b8a6SAneesh Kumar K.V pgtable_page_dtor(ptepage); 11975a9b8a6SAneesh Kumar K.V __free_page(ptepage); 12075a9b8a6SAneesh Kumar K.V } 12175a9b8a6SAneesh Kumar K.V 12275a9b8a6SAneesh Kumar K.V static inline void pgtable_free(void *table, unsigned index_size) 12375a9b8a6SAneesh Kumar K.V { 12475a9b8a6SAneesh Kumar K.V if (!index_size) 12575a9b8a6SAneesh Kumar K.V free_page((unsigned long)table); 12675a9b8a6SAneesh Kumar K.V else { 12775a9b8a6SAneesh Kumar K.V BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE); 12875a9b8a6SAneesh Kumar K.V kmem_cache_free(PGT_CACHE(index_size), table); 12975a9b8a6SAneesh Kumar K.V } 13075a9b8a6SAneesh Kumar K.V } 13175a9b8a6SAneesh Kumar K.V 13275a9b8a6SAneesh Kumar K.V #ifdef CONFIG_SMP 13375a9b8a6SAneesh Kumar K.V static inline void pgtable_free_tlb(struct mmu_gather *tlb, 13475a9b8a6SAneesh Kumar K.V void *table, int shift) 13575a9b8a6SAneesh Kumar K.V { 13675a9b8a6SAneesh Kumar K.V unsigned long pgf = (unsigned long)table; 13775a9b8a6SAneesh Kumar K.V BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); 13875a9b8a6SAneesh Kumar K.V pgf |= shift; 13975a9b8a6SAneesh Kumar K.V tlb_remove_table(tlb, (void *)pgf); 14075a9b8a6SAneesh Kumar K.V } 14175a9b8a6SAneesh Kumar K.V 14275a9b8a6SAneesh Kumar K.V static inline void __tlb_remove_table(void *_table) 14375a9b8a6SAneesh Kumar K.V { 14475a9b8a6SAneesh Kumar K.V void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); 14575a9b8a6SAneesh Kumar K.V unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; 14675a9b8a6SAneesh Kumar K.V 14775a9b8a6SAneesh Kumar K.V pgtable_free(table, shift); 14875a9b8a6SAneesh Kumar K.V } 14975a9b8a6SAneesh Kumar K.V #else /* !CONFIG_SMP */ 15075a9b8a6SAneesh Kumar K.V static inline void pgtable_free_tlb(struct mmu_gather *tlb, 15175a9b8a6SAneesh Kumar K.V void *table, int shift) 15275a9b8a6SAneesh Kumar K.V { 15375a9b8a6SAneesh Kumar K.V pgtable_free(table, shift); 15475a9b8a6SAneesh Kumar K.V } 15575a9b8a6SAneesh Kumar K.V #endif /* CONFIG_SMP */ 15675a9b8a6SAneesh Kumar K.V 15775a9b8a6SAneesh Kumar K.V static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, 15875a9b8a6SAneesh Kumar K.V unsigned long address) 15975a9b8a6SAneesh Kumar K.V { 16075a9b8a6SAneesh Kumar K.V tlb_flush_pgtable(tlb, address); 16175a9b8a6SAneesh Kumar K.V pgtable_page_dtor(table); 16275a9b8a6SAneesh Kumar K.V pgtable_free_tlb(tlb, page_address(table), 0); 16375a9b8a6SAneesh Kumar K.V } 16475a9b8a6SAneesh Kumar K.V 16575a9b8a6SAneesh Kumar K.V #else /* if CONFIG_PPC_64K_PAGES */ 16675a9b8a6SAneesh Kumar K.V 16775a9b8a6SAneesh Kumar K.V extern pte_t *page_table_alloc(struct mm_struct *, unsigned long, int); 16875a9b8a6SAneesh Kumar K.V extern void page_table_free(struct mm_struct *, unsigned long *, int); 16975a9b8a6SAneesh Kumar K.V extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift); 17075a9b8a6SAneesh Kumar K.V #ifdef CONFIG_SMP 17175a9b8a6SAneesh Kumar K.V extern void __tlb_remove_table(void *_table); 17275a9b8a6SAneesh Kumar K.V #endif 17375a9b8a6SAneesh Kumar K.V 17475a9b8a6SAneesh Kumar K.V #ifndef __PAGETABLE_PUD_FOLDED 17575a9b8a6SAneesh Kumar K.V /* book3s 64 is 4 level page table */ 17675a9b8a6SAneesh Kumar K.V static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) 17775a9b8a6SAneesh Kumar K.V { 17875a9b8a6SAneesh Kumar K.V pgd_set(pgd, __pgtable_ptr_val(pud)); 17975a9b8a6SAneesh Kumar K.V } 18075a9b8a6SAneesh Kumar K.V 18175a9b8a6SAneesh Kumar K.V static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 18275a9b8a6SAneesh Kumar K.V { 18375a9b8a6SAneesh Kumar K.V return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), 18475a9b8a6SAneesh Kumar K.V GFP_KERNEL|__GFP_REPEAT); 18575a9b8a6SAneesh Kumar K.V } 18675a9b8a6SAneesh Kumar K.V 18775a9b8a6SAneesh Kumar K.V static inline void pud_free(struct mm_struct *mm, pud_t *pud) 18875a9b8a6SAneesh Kumar K.V { 18975a9b8a6SAneesh Kumar K.V kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud); 19075a9b8a6SAneesh Kumar K.V } 19175a9b8a6SAneesh Kumar K.V #endif 19275a9b8a6SAneesh Kumar K.V 19375a9b8a6SAneesh Kumar K.V static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 19475a9b8a6SAneesh Kumar K.V { 19575a9b8a6SAneesh Kumar K.V pud_set(pud, __pgtable_ptr_val(pmd)); 19675a9b8a6SAneesh Kumar K.V } 19775a9b8a6SAneesh Kumar K.V 19875a9b8a6SAneesh Kumar K.V static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 19975a9b8a6SAneesh Kumar K.V pte_t *pte) 20075a9b8a6SAneesh Kumar K.V { 20175a9b8a6SAneesh Kumar K.V pmd_set(pmd, __pgtable_ptr_val(pte)); 20275a9b8a6SAneesh Kumar K.V } 20375a9b8a6SAneesh Kumar K.V 20475a9b8a6SAneesh Kumar K.V static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 20575a9b8a6SAneesh Kumar K.V pgtable_t pte_page) 20675a9b8a6SAneesh Kumar K.V { 20775a9b8a6SAneesh Kumar K.V pmd_set(pmd, __pgtable_ptr_val(pte_page)); 20875a9b8a6SAneesh Kumar K.V } 20975a9b8a6SAneesh Kumar K.V 21075a9b8a6SAneesh Kumar K.V static inline pgtable_t pmd_pgtable(pmd_t pmd) 21175a9b8a6SAneesh Kumar K.V { 21275a9b8a6SAneesh Kumar K.V return (pgtable_t)pmd_page_vaddr(pmd); 21375a9b8a6SAneesh Kumar K.V } 21475a9b8a6SAneesh Kumar K.V 21575a9b8a6SAneesh Kumar K.V static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 21675a9b8a6SAneesh Kumar K.V unsigned long address) 21775a9b8a6SAneesh Kumar K.V { 21875a9b8a6SAneesh Kumar K.V return (pte_t *)page_table_alloc(mm, address, 1); 21975a9b8a6SAneesh Kumar K.V } 22075a9b8a6SAneesh Kumar K.V 22175a9b8a6SAneesh Kumar K.V static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 22275a9b8a6SAneesh Kumar K.V unsigned long address) 22375a9b8a6SAneesh Kumar K.V { 22475a9b8a6SAneesh Kumar K.V return (pgtable_t)page_table_alloc(mm, address, 0); 22575a9b8a6SAneesh Kumar K.V } 22675a9b8a6SAneesh Kumar K.V 22775a9b8a6SAneesh Kumar K.V static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 22875a9b8a6SAneesh Kumar K.V { 22975a9b8a6SAneesh Kumar K.V page_table_free(mm, (unsigned long *)pte, 1); 23075a9b8a6SAneesh Kumar K.V } 23175a9b8a6SAneesh Kumar K.V 23275a9b8a6SAneesh Kumar K.V static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) 23375a9b8a6SAneesh Kumar K.V { 23475a9b8a6SAneesh Kumar K.V page_table_free(mm, (unsigned long *)ptepage, 0); 23575a9b8a6SAneesh Kumar K.V } 23675a9b8a6SAneesh Kumar K.V 23775a9b8a6SAneesh Kumar K.V static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, 23875a9b8a6SAneesh Kumar K.V unsigned long address) 23975a9b8a6SAneesh Kumar K.V { 24075a9b8a6SAneesh Kumar K.V tlb_flush_pgtable(tlb, address); 24175a9b8a6SAneesh Kumar K.V pgtable_free_tlb(tlb, table, 0); 24275a9b8a6SAneesh Kumar K.V } 24375a9b8a6SAneesh Kumar K.V #endif /* CONFIG_PPC_64K_PAGES */ 24475a9b8a6SAneesh Kumar K.V 24575a9b8a6SAneesh Kumar K.V static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 24675a9b8a6SAneesh Kumar K.V { 24775a9b8a6SAneesh Kumar K.V return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX), 24875a9b8a6SAneesh Kumar K.V GFP_KERNEL|__GFP_REPEAT); 24975a9b8a6SAneesh Kumar K.V } 25075a9b8a6SAneesh Kumar K.V 25175a9b8a6SAneesh Kumar K.V static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 25275a9b8a6SAneesh Kumar K.V { 25375a9b8a6SAneesh Kumar K.V kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd); 25475a9b8a6SAneesh Kumar K.V } 25575a9b8a6SAneesh Kumar K.V 25675a9b8a6SAneesh Kumar K.V #define __pmd_free_tlb(tlb, pmd, addr) \ 25775a9b8a6SAneesh Kumar K.V pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX) 25875a9b8a6SAneesh Kumar K.V #ifndef __PAGETABLE_PUD_FOLDED 25975a9b8a6SAneesh Kumar K.V #define __pud_free_tlb(tlb, pud, addr) \ 26075a9b8a6SAneesh Kumar K.V pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE) 26175a9b8a6SAneesh Kumar K.V 26275a9b8a6SAneesh Kumar K.V #endif /* __PAGETABLE_PUD_FOLDED */ 26375a9b8a6SAneesh Kumar K.V 26475a9b8a6SAneesh Kumar K.V #define check_pgt_cache() do { } while (0) 26575a9b8a6SAneesh Kumar K.V 26675a9b8a6SAneesh Kumar K.V #endif /* _ASM_POWERPC_PGALLOC_64_H */ 267