#ifndef _S390_PGALLOC_H
#define _S390_PGALLOC_H
-#include <linux/config.h>
#include <linux/threads.h>
#include <linux/gfp.h>
#include <linux/mm.h>
+#define arch_add_exec_range(mm, limit) do { ; } while (0)
+#define arch_flush_exec_range(mm) do { ; } while (0)
+#define arch_remove_exec_range(mm, limit) do { ; } while (0)
+
#define check_pgt_cache() do {} while (0)
extern void diag10(unsigned long addr);
+/*
+ * Page allocation orders.
+ */
+#ifndef __s390x__
+# define PTE_ALLOC_ORDER 0
+# define PMD_ALLOC_ORDER 0
+# define PGD_ALLOC_ORDER 1
+#else /* __s390x__ */
+# define PTE_ALLOC_ORDER 0
+# define PMD_ALLOC_ORDER 2
+# define PGD_ALLOC_ORDER 2
+#endif /* __s390x__ */
+
/*
* Allocate and free page tables. The xxx_kernel() versions are
* used to allocate a kernel page table - this turns on ASN bits
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
- pgd_t *pgd;
+ pgd_t *pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ALLOC_ORDER);
int i;
+ if (!pgd)
+ return NULL;
+ for (i = 0; i < PTRS_PER_PGD; i++)
#ifndef __s390x__
- pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,1);
- if (pgd != NULL)
- for (i = 0; i < USER_PTRS_PER_PGD; i++)
- pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE));
-#else /* __s390x__ */
- pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,2);
- if (pgd != NULL)
- for (i = 0; i < PTRS_PER_PGD; i++)
- pgd_clear(pgd + i);
-#endif /* __s390x__ */
+ pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE));
+#else
+ pgd_clear(pgd + i);
+#endif
return pgd;
}
static inline void pgd_free(pgd_t *pgd)
{
-#ifndef __s390x__
- free_pages((unsigned long) pgd, 1);
-#else /* __s390x__ */
- free_pages((unsigned long) pgd, 2);
-#endif /* __s390x__ */
+ free_pages((unsigned long) pgd, PGD_ALLOC_ORDER);
}
#ifndef __s390x__
#else /* __s390x__ */
static inline pmd_t * pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
{
- pmd_t *pmd;
- int i;
+ pmd_t *pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ALLOC_ORDER);
+ int i;
- pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, 2);
- if (pmd != NULL) {
- for (i=0; i < PTRS_PER_PMD; i++)
- pmd_clear(pmd+i);
- }
+ if (!pmd)
+ return NULL;
+ for (i=0; i < PTRS_PER_PMD; i++)
+ pmd_clear(pmd + i);
return pmd;
}
static inline void pmd_free (pmd_t *pmd)
{
- free_pages((unsigned long) pmd, 2);
+ free_pages((unsigned long) pmd, PMD_ALLOC_ORDER);
}
#define __pmd_free_tlb(tlb,pmd) \
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
{
- pmd_populate_kernel(mm, pmd, (pte_t *)((page-mem_map) << PAGE_SHIFT));
+ pmd_populate_kernel(mm, pmd, (pte_t *)page_to_phys(page));
}
/*
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long vmaddr)
{
- pte_t *pte;
- int i;
-
- pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
- if (pte != NULL) {
- for (i=0; i < PTRS_PER_PTE; i++) {
- pte_clear(mm, vmaddr, pte+i);
- vmaddr += PAGE_SIZE;
- }
+ pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT);
+ int i;
+
+ if (!pte)
+ return NULL;
+ for (i=0; i < PTRS_PER_PTE; i++) {
+ pte_clear(mm, vmaddr, pte + i);
+ vmaddr += PAGE_SIZE;
}
return pte;
}
pte_t *pte = pte_alloc_one_kernel(mm, vmaddr);
if (pte)
return virt_to_page(pte);
- return 0;
+ return NULL;
}
static inline void pte_free_kernel(pte_t *pte)
#define __pte_free_tlb(tlb,pte) tlb_remove_page(tlb,pte)
-/*
- * This establishes kernel virtual mappings (e.g., as a result of a
- * vmalloc call). Since s390-esame uses a separate kernel page table,
- * there is nothing to do here... :)
- */
-#define set_pgdir(addr,entry) do { } while(0)
-
#endif /* _S390_PGALLOC_H */