53492b1de4
This adds hugetlbfs support on System z, using both hardware large page support if available and software large page emulation on older hardware. Shared (large) page tables are implemented in software emulation mode, by using page->index of the first tail page from a compound large page to store page table information. Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
167 lines
4.4 KiB
C
167 lines
4.4 KiB
C
/*
|
|
* include/asm-s390/page.h
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Author(s): Hartmut Penner (hp@de.ibm.com)
|
|
*/
|
|
|
|
#ifndef _S390_PAGE_H
|
|
#define _S390_PAGE_H
|
|
|
|
#include <linux/const.h>
|
|
#include <asm/types.h>
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PAGE_DEFAULT_ACC 0
|
|
#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
|
|
|
|
#define HPAGE_SHIFT 20
|
|
#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#define ARCH_HAS_SETCLEAR_HUGE_PTE
|
|
#define ARCH_HAS_HUGE_PTE_TYPE
|
|
#define ARCH_HAS_PREPARE_HUGEPAGE
|
|
#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
|
|
|
|
#include <asm/setup.h>
|
|
#ifndef __ASSEMBLY__
|
|
|
|
static inline void clear_page(void *page)
|
|
{
|
|
if (MACHINE_HAS_PFMF) {
|
|
asm volatile(
|
|
" .insn rre,0xb9af0000,%0,%1"
|
|
: : "d" (0x10000), "a" (page) : "memory", "cc");
|
|
} else {
|
|
register unsigned long reg1 asm ("1") = 0;
|
|
register void *reg2 asm ("2") = page;
|
|
register unsigned long reg3 asm ("3") = 4096;
|
|
asm volatile(
|
|
" mvcl 2,0"
|
|
: "+d" (reg2), "+d" (reg3) : "d" (reg1)
|
|
: "memory", "cc");
|
|
}
|
|
}
|
|
|
|
static inline void copy_page(void *to, void *from)
|
|
{
|
|
if (MACHINE_HAS_MVPG) {
|
|
register unsigned long reg0 asm ("0") = 0;
|
|
asm volatile(
|
|
" mvpg %0,%1"
|
|
: : "a" (to), "a" (from), "d" (reg0)
|
|
: "memory", "cc");
|
|
} else
|
|
asm volatile(
|
|
" mvc 0(256,%0),0(%1)\n"
|
|
" mvc 256(256,%0),256(%1)\n"
|
|
" mvc 512(256,%0),512(%1)\n"
|
|
" mvc 768(256,%0),768(%1)\n"
|
|
" mvc 1024(256,%0),1024(%1)\n"
|
|
" mvc 1280(256,%0),1280(%1)\n"
|
|
" mvc 1536(256,%0),1536(%1)\n"
|
|
" mvc 1792(256,%0),1792(%1)\n"
|
|
" mvc 2048(256,%0),2048(%1)\n"
|
|
" mvc 2304(256,%0),2304(%1)\n"
|
|
" mvc 2560(256,%0),2560(%1)\n"
|
|
" mvc 2816(256,%0),2816(%1)\n"
|
|
" mvc 3072(256,%0),3072(%1)\n"
|
|
" mvc 3328(256,%0),3328(%1)\n"
|
|
" mvc 3584(256,%0),3584(%1)\n"
|
|
" mvc 3840(256,%0),3840(%1)\n"
|
|
: : "a" (to), "a" (from) : "memory");
|
|
}
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
|
|
alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
|
|
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
typedef struct { unsigned long pud; } pud_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
typedef pte_t *pgtable_t;
|
|
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
#define pte_val(x) ((x).pte)
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define pud_val(x) ((x).pud)
|
|
#define pgd_val(x) ((x).pgd)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
/* default storage key used for all pages */
|
|
extern unsigned int default_storage_key;
|
|
|
|
static inline void
|
|
page_set_storage_key(unsigned long addr, unsigned int skey)
|
|
{
|
|
asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
|
|
}
|
|
|
|
static inline unsigned int
|
|
page_get_storage_key(unsigned long addr)
|
|
{
|
|
unsigned int skey;
|
|
|
|
asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
|
|
return skey;
|
|
}
|
|
|
|
extern unsigned long max_pfn;
|
|
|
|
static inline int pfn_valid(unsigned long pfn)
|
|
{
|
|
unsigned long dummy;
|
|
int ccode;
|
|
|
|
if (pfn >= max_pfn)
|
|
return 0;
|
|
|
|
asm volatile(
|
|
" lra %0,0(%2)\n"
|
|
" ipm %1\n"
|
|
" srl %1,28\n"
|
|
: "=d" (dummy), "=d" (ccode)
|
|
: "a" (pfn << PAGE_SHIFT)
|
|
: "cc");
|
|
return !ccode;
|
|
}
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
#define __PAGE_OFFSET 0x0UL
|
|
#define PAGE_OFFSET 0x0UL
|
|
#define __pa(x) (unsigned long)(x)
|
|
#define __va(x) (void *)(unsigned long)(x)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* _S390_PAGE_H */
|