Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180/* SPDX-License-Identifier: GPL-2.0 *//* * S390 version * Copyright IBM Corp. 1999, 2000 * Author(s): Hartmut Penner (hp@de.ibm.com) * Martin Schwidefsky (schwidefsky@de.ibm.com) * * Derived from "include/asm-i386/pgalloc.h" * Copyright (C) 1994 Linus Torvalds */
#ifndef _S390_PGALLOC_H#define _S390_PGALLOC_H
#include <linux/threads.h>#include <linux/string.h>#include <linux/gfp.h>#include <linux/mm.h>
#define CRST_ALLOC_ORDER 2
unsigned long *crst_table_alloc_noprof(struct mm_struct *);#define crst_table_alloc(...) alloc_hooks(crst_table_alloc_noprof(__VA_ARGS__))void crst_table_free(struct mm_struct *, unsigned long *);
unsigned long *page_table_alloc_noprof(struct mm_struct *);#define page_table_alloc(...) alloc_hooks(page_table_alloc_noprof(__VA_ARGS__))void page_table_free(struct mm_struct *, unsigned long *);
static inline void crst_table_init(unsigned long *crst, unsigned long entry){ memset64((u64 *)crst, entry, _CRST_ENTRIES);}
int crst_table_upgrade(struct mm_struct *mm, unsigned long limit);
static inline unsigned long check_asce_limit(struct mm_struct *mm, unsigned long addr, unsigned long len){ int rc;
if (addr + len > mm->context.asce_limit && addr + len <= TASK_SIZE) { rc = crst_table_upgrade(mm, addr + len); if (rc) return (unsigned long) rc; } return addr;}
static inline p4d_t *p4d_alloc_one_noprof(struct mm_struct *mm, unsigned long address){ unsigned long *table = crst_table_alloc_noprof(mm);
if (!table) return NULL; crst_table_init(table, _REGION2_ENTRY_EMPTY); pagetable_p4d_ctor(virt_to_ptdesc(table));
return (p4d_t *) table;}#define p4d_alloc_one(...) alloc_hooks(p4d_alloc_one_noprof(__VA_ARGS__))
static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d){ if (mm_p4d_folded(mm)) return;
pagetable_dtor(virt_to_ptdesc(p4d)); crst_table_free(mm, (unsigned long *) p4d);}
static inline pud_t *pud_alloc_one_noprof(struct mm_struct *mm, unsigned long address){ unsigned long *table = crst_table_alloc_noprof(mm);
if (!table) return NULL; crst_table_init(table, _REGION3_ENTRY_EMPTY); pagetable_pud_ctor(virt_to_ptdesc(table));
return (pud_t *) table;}#define pud_alloc_one(...) alloc_hooks(pud_alloc_one_noprof(__VA_ARGS__))
static inline void pud_free(struct mm_struct *mm, pud_t *pud){ if (mm_pud_folded(mm)) return;
pagetable_dtor(virt_to_ptdesc(pud)); crst_table_free(mm, (unsigned long *) pud);}
static inline pmd_t *pmd_alloc_one_noprof(struct mm_struct *mm, unsigned long vmaddr){ unsigned long *table = crst_table_alloc_noprof(mm);
if (!table) return NULL; crst_table_init(table, _SEGMENT_ENTRY_EMPTY); if (!pagetable_pmd_ctor(mm, virt_to_ptdesc(table))) { crst_table_free(mm, table); return NULL; } return (pmd_t *) table;}#define pmd_alloc_one(...) alloc_hooks(pmd_alloc_one_noprof(__VA_ARGS__))
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd){ if (mm_pmd_folded(mm)) return; pagetable_dtor(virt_to_ptdesc(pmd)); crst_table_free(mm, (unsigned long *) pmd);}
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d){ set_pgd(pgd, __pgd(_REGION1_ENTRY | __pa(p4d)));}
static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud){ set_p4d(p4d, __p4d(_REGION2_ENTRY | __pa(pud)));}
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd){ set_pud(pud, __pud(_REGION3_ENTRY | __pa(pmd)));}
static inline pgd_t *pgd_alloc_noprof(struct mm_struct *mm){ unsigned long *table = crst_table_alloc_noprof(mm);
if (!table) return NULL; pagetable_pgd_ctor(virt_to_ptdesc(table));
return (pgd_t *) table;}#define pgd_alloc(...) alloc_hooks(pgd_alloc_noprof(__VA_ARGS__))
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd){ pagetable_dtor(virt_to_ptdesc(pgd)); crst_table_free(mm, (unsigned long *) pgd);}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte){ set_pmd(pmd, __pmd(_SEGMENT_ENTRY | __pa(pte)));}
#define pmd_populate_kernel(mm, pmd, pte) pmd_populate(mm, pmd, pte)
/* * page table entry allocation/free routines. */#define pte_alloc_one_kernel(mm) ((pte_t *)page_table_alloc(mm))#define pte_alloc_one(mm) ((pte_t *)page_table_alloc(mm))
#define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte)#define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte)
/* arch use pte_free_defer() implementation in arch/s390/mm/pgalloc.c */#define pte_free_defer pte_free_defervoid pte_free_defer(struct mm_struct *mm, pgtable_t pgtable);
void vmem_map_init(void);void *vmem_crst_alloc(unsigned long val);pte_t *vmem_pte_alloc(void);
unsigned long base_asce_alloc(unsigned long addr, unsigned long num_pages);void base_asce_free(unsigned long asce);
#endif /* _S390_PGALLOC_H */