mirror of
https://github.com/torvalds/linux.git
synced 2024-12-11 21:52:04 +00:00
88ced03149
include/asm-ppc/ had #ifdef __KERNEL__ in all header files that are not meant for use by user space, include/asm-powerpc does not have this yet. This patch gets us a lot closer there. There are a few cases where I was not sure, so I left them out. I have verified that no CONFIG_* symbols are used outside of __KERNEL__ any more and that there are no obvious compile errors when including any of the headers in user space libraries. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
176 lines
5.1 KiB
C
176 lines
5.1 KiB
C
#ifndef _ASM_POWERPC_PAGE_64_H
|
|
#define _ASM_POWERPC_PAGE_64_H
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* 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 */
|
|
#define SID_SHIFT 28
|
|
#define SID_MASK 0xfffffffffUL
|
|
#define ESID_MASK 0xfffffffff0000000UL
|
|
#define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK)
|
|
|
|
#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_HUGETLB_PAGE
|
|
|
|
#define HTLB_AREA_SHIFT 40
|
|
#define HTLB_AREA_SIZE (1UL << HTLB_AREA_SHIFT)
|
|
#define GET_HTLB_AREA(x) ((x) >> HTLB_AREA_SHIFT)
|
|
|
|
#define LOW_ESID_MASK(addr, len) \
|
|
(((1U << (GET_ESID(min((addr)+(len)-1, 0x100000000UL))+1)) \
|
|
- (1U << GET_ESID(min((addr), 0x100000000UL)))) & 0xffff)
|
|
#define HTLB_AREA_MASK(addr, len) (((1U << (GET_HTLB_AREA(addr+len-1)+1)) \
|
|
- (1U << GET_HTLB_AREA(addr))) & 0xffff)
|
|
|
|
#define ARCH_HAS_HUGEPAGE_ONLY_RANGE
|
|
#define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
|
|
#define ARCH_HAS_SETCLEAR_HUGE_PTE
|
|
|
|
#define touches_hugepage_low_range(mm, addr, len) \
|
|
(((addr) < 0x100000000UL) \
|
|
&& (LOW_ESID_MASK((addr), (len)) & (mm)->context.low_htlb_areas))
|
|
#define touches_hugepage_high_range(mm, addr, len) \
|
|
((((addr) + (len)) > 0x100000000UL) \
|
|
&& (HTLB_AREA_MASK((addr), (len)) & (mm)->context.high_htlb_areas))
|
|
|
|
#define __within_hugepage_low_range(addr, len, segmask) \
|
|
( (((addr)+(len)) <= 0x100000000UL) \
|
|
&& ((LOW_ESID_MASK((addr), (len)) | (segmask)) == (segmask)))
|
|
#define within_hugepage_low_range(addr, len) \
|
|
__within_hugepage_low_range((addr), (len), \
|
|
current->mm->context.low_htlb_areas)
|
|
#define __within_hugepage_high_range(addr, len, zonemask) \
|
|
( ((addr) >= 0x100000000UL) \
|
|
&& ((HTLB_AREA_MASK((addr), (len)) | (zonemask)) == (zonemask)))
|
|
#define within_hugepage_high_range(addr, len) \
|
|
__within_hugepage_high_range((addr), (len), \
|
|
current->mm->context.high_htlb_areas)
|
|
|
|
#define is_hugepage_only_range(mm, addr, len) \
|
|
(touches_hugepage_high_range((mm), (addr), (len)) || \
|
|
touches_hugepage_low_range((mm), (addr), (len)))
|
|
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
|
|
|
|
#define in_hugepage_area(context, addr) \
|
|
(cpu_has_feature(CPU_FTR_16M_PAGE) && \
|
|
( ( (addr) >= 0x100000000UL) \
|
|
? ((1 << GET_HTLB_AREA(addr)) & (context).high_htlb_areas) \
|
|
: ((1 << GET_ESID(addr)) & (context).low_htlb_areas) ) )
|
|
|
|
#else /* !CONFIG_HUGETLB_PAGE */
|
|
|
|
#define in_hugepage_area(mm, addr) 0
|
|
|
|
#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 /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_PAGE_64_H */
|