179 lines
4.7 KiB
C
179 lines
4.7 KiB
C
#ifndef _ASM_POWERPC_PAGE_64_H
|
|
#define _ASM_POWERPC_PAGE_64_H
|
|
|
|
/*
|
|
* Copyright (C) 2001 PPC64 Team, IBM Corp
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
/*
|
|
* We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux
|
|
* specific, every notion of page number shared with the firmware, TCEs,
|
|
* iommu, etc... still uses a page size of 4K.
|
|
*/
|
|
#define HW_PAGE_SHIFT 12
|
|
#define HW_PAGE_SIZE (ASM_CONST(1) << HW_PAGE_SHIFT)
|
|
#define HW_PAGE_MASK (~(HW_PAGE_SIZE-1))
|
|
|
|
/*
|
|
* PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
|
|
* HW_PAGE_SHIFT, that is 4K pages.
|
|
*/
|
|
#define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT)
|
|
|
|
/* Segment size; normal 256M segments */
|
|
#define SID_SHIFT 28
|
|
#define SID_MASK ASM_CONST(0xfffffffff)
|
|
#define ESID_MASK 0xfffffffff0000000UL
|
|
#define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK)
|
|
|
|
/* 1T segments */
|
|
#define SID_SHIFT_1T 40
|
|
#define SID_MASK_1T 0xffffffUL
|
|
#define ESID_MASK_1T 0xffffff0000000000UL
|
|
#define GET_ESID_1T(x) (((x) >> SID_SHIFT_1T) & SID_MASK_1T)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/cache.h>
|
|
|
|
typedef unsigned long pte_basic_t;
|
|
|
|
static __inline__ void clear_page(void *addr)
|
|
{
|
|
unsigned long lines, line_size;
|
|
|
|
line_size = ppc64_caches.dline_size;
|
|
lines = ppc64_caches.dlines_per_page;
|
|
|
|
__asm__ __volatile__(
|
|
"mtctr %1 # clear_page\n\
|
|
1: dcbz 0,%0\n\
|
|
add %0,%0,%3\n\
|
|
bdnz+ 1b"
|
|
: "=r" (addr)
|
|
: "r" (lines), "0" (addr), "r" (line_size)
|
|
: "ctr", "memory");
|
|
}
|
|
|
|
extern void copy_4K_page(void *to, void *from);
|
|
|
|
#ifdef CONFIG_PPC_64K_PAGES
|
|
static inline void copy_page(void *to, void *from)
|
|
{
|
|
unsigned int i;
|
|
for (i=0; i < (1 << (PAGE_SHIFT - 12)); i++) {
|
|
copy_4K_page(to, from);
|
|
to += 4096;
|
|
from += 4096;
|
|
}
|
|
}
|
|
#else /* CONFIG_PPC_64K_PAGES */
|
|
static inline void copy_page(void *to, void *from)
|
|
{
|
|
copy_4K_page(to, from);
|
|
}
|
|
#endif /* CONFIG_PPC_64K_PAGES */
|
|
|
|
/* Log 2 of page table size */
|
|
extern u64 ppc64_pft_size;
|
|
|
|
/* Large pages size */
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
extern unsigned int HPAGE_SHIFT;
|
|
#else
|
|
#define HPAGE_SHIFT PAGE_SHIFT
|
|
#endif
|
|
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_PPC_MM_SLICES
|
|
|
|
#define SLICE_LOW_SHIFT 28
|
|
#define SLICE_HIGH_SHIFT 40
|
|
|
|
#define SLICE_LOW_TOP (0x100000000ul)
|
|
#define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
|
|
#define SLICE_NUM_HIGH (PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
|
|
|
|
#define GET_LOW_SLICE_INDEX(addr) ((addr) >> SLICE_LOW_SHIFT)
|
|
#define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct slice_mask {
|
|
u16 low_slices;
|
|
u16 high_slices;
|
|
};
|
|
|
|
struct mm_struct;
|
|
|
|
extern unsigned long slice_get_unmapped_area(unsigned long addr,
|
|
unsigned long len,
|
|
unsigned long flags,
|
|
unsigned int psize,
|
|
int topdown,
|
|
int use_cache);
|
|
|
|
extern unsigned int get_slice_psize(struct mm_struct *mm,
|
|
unsigned long addr);
|
|
|
|
extern void slice_init_context(struct mm_struct *mm, unsigned int psize);
|
|
extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
|
|
#define slice_mm_new_context(mm) ((mm)->context.id == 0)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#else
|
|
#define slice_init()
|
|
#define slice_set_user_psize(mm, psize) \
|
|
do { \
|
|
(mm)->context.user_psize = (psize); \
|
|
(mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
|
|
} while (0)
|
|
#define slice_mm_new_context(mm) 1
|
|
#endif /* CONFIG_PPC_MM_SLICES */
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
|
|
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
|
|
|
|
#endif /* !CONFIG_HUGETLB_PAGE */
|
|
|
|
#ifdef MODULE
|
|
#define __page_aligned __attribute__((__aligned__(PAGE_SIZE)))
|
|
#else
|
|
#define __page_aligned \
|
|
__attribute__((__aligned__(PAGE_SIZE), \
|
|
__section__(".data.page_aligned")))
|
|
#endif
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS \
|
|
(test_thread_flag(TIF_32BIT) ? \
|
|
VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
|
|
|
|
/*
|
|
* This is the default if a program doesn't have a PT_GNU_STACK
|
|
* program header entry. The PPC64 ELF ABI has a non executable stack
|
|
* stack by default, so in the absense of a PT_GNU_STACK program header
|
|
* we turn execute permission off.
|
|
*/
|
|
#define VM_STACK_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#define VM_STACK_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#define VM_STACK_DEFAULT_FLAGS \
|
|
(test_thread_flag(TIF_32BIT) ? \
|
|
VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
|
|
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* _ASM_POWERPC_PAGE_64_H */
|