mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 12:11:40 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
262 lines
7.7 KiB
C
262 lines
7.7 KiB
C
#ifndef _PPC64_PAGE_H
|
|
#define _PPC64_PAGE_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.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifdef __ASSEMBLY__
|
|
#define ASM_CONST(x) x
|
|
#else
|
|
#define __ASM_CONST(x) x##UL
|
|
#define ASM_CONST(x) __ASM_CONST(x)
|
|
#endif
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PAGE_OFFSET_MASK (PAGE_SIZE-1)
|
|
|
|
#define SID_SHIFT 28
|
|
#define SID_MASK 0xfffffffffUL
|
|
#define ESID_MASK 0xfffffffff0000000UL
|
|
#define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK)
|
|
|
|
#define HPAGE_SHIFT 24
|
|
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
/* For 64-bit processes the hugepage range is 1T-1.5T */
|
|
#define TASK_HPAGE_BASE ASM_CONST(0x0000010000000000)
|
|
#define TASK_HPAGE_END ASM_CONST(0x0000018000000000)
|
|
|
|
#define LOW_ESID_MASK(addr, len) (((1U << (GET_ESID(addr+len-1)+1)) \
|
|
- (1U << GET_ESID(addr))) & 0xffff)
|
|
|
|
#define ARCH_HAS_HUGEPAGE_ONLY_RANGE
|
|
#define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
|
|
|
|
#define touches_hugepage_low_range(mm, addr, len) \
|
|
(LOW_ESID_MASK((addr), (len)) & mm->context.htlb_segs)
|
|
#define touches_hugepage_high_range(addr, len) \
|
|
(((addr) > (TASK_HPAGE_BASE-(len))) && ((addr) < TASK_HPAGE_END))
|
|
|
|
#define __within_hugepage_low_range(addr, len, segmask) \
|
|
((LOW_ESID_MASK((addr), (len)) | (segmask)) == (segmask))
|
|
#define within_hugepage_low_range(addr, len) \
|
|
__within_hugepage_low_range((addr), (len), \
|
|
current->mm->context.htlb_segs)
|
|
#define within_hugepage_high_range(addr, len) (((addr) >= TASK_HPAGE_BASE) \
|
|
&& ((addr)+(len) <= TASK_HPAGE_END) && ((addr)+(len) >= (addr)))
|
|
|
|
#define is_hugepage_only_range(mm, addr, len) \
|
|
(touches_hugepage_high_range((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) >= TASK_HPAGE_BASE) && ((addr) < TASK_HPAGE_END)) || \
|
|
( ((addr) < 0x100000000L) && \
|
|
((1 << GET_ESID(addr)) & (context).htlb_segs) ) ) )
|
|
|
|
#else /* !CONFIG_HUGETLB_PAGE */
|
|
|
|
#define in_hugepage_area(mm, addr) 0
|
|
|
|
#endif /* !CONFIG_HUGETLB_PAGE */
|
|
|
|
/* align addr on a size boundary - adjust address up/down if needed */
|
|
#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
|
|
#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
|
|
|
|
/* align addr on a size boundary - adjust address up if needed */
|
|
#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
|
|
|
|
/* to align the pointer to the (next) double word boundary */
|
|
#define DOUBLEWORD_ALIGN(addr) _ALIGN(addr,sizeof(unsigned long))
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
|
|
|
|
#ifdef __KERNEL__
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/cache.h>
|
|
|
|
#undef STRICT_MM_TYPECHECKS
|
|
|
|
#define REGION_SIZE 4UL
|
|
#define REGION_SHIFT 60UL
|
|
#define REGION_MASK (((1UL<<REGION_SIZE)-1UL)<<REGION_SHIFT)
|
|
#define REGION_STRIDE (1UL << REGION_SHIFT)
|
|
|
|
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_page(void *to, void *from);
|
|
struct page;
|
|
extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
|
|
extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *p);
|
|
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
/*
|
|
* These are used to make use of C type-checking.
|
|
* Entries in the pte table are 64b, while entries in the pgd & pmd are 32b.
|
|
*/
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned int pmd; } pmd_t;
|
|
typedef struct { unsigned int pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#else
|
|
/*
|
|
* .. while these make it easier on the compiler
|
|
*/
|
|
typedef unsigned long pte_t;
|
|
typedef unsigned int pmd_t;
|
|
typedef unsigned int pgd_t;
|
|
typedef unsigned long pgprot_t;
|
|
|
|
#define pte_val(x) (x)
|
|
#define pmd_val(x) (x)
|
|
#define pgd_val(x) (x)
|
|
#define pgprot_val(x) (x)
|
|
|
|
#define __pte(x) (x)
|
|
#define __pmd(x) (x)
|
|
#define __pgd(x) (x)
|
|
#define __pgprot(x) (x)
|
|
|
|
#endif
|
|
|
|
/* Pure 2^n version of get_order */
|
|
static inline int get_order(unsigned long size)
|
|
{
|
|
int order;
|
|
|
|
size = (size-1) >> (PAGE_SHIFT-1);
|
|
order = -1;
|
|
do {
|
|
size >>= 1;
|
|
order++;
|
|
} while (size);
|
|
return order;
|
|
}
|
|
|
|
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
|
|
|
|
extern int page_is_ram(unsigned long pfn);
|
|
|
|
extern u64 ppc64_pft_size; /* Log 2 of page table size */
|
|
|
|
/* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */
|
|
#define __HAVE_ARCH_GATE_AREA 1
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#ifdef MODULE
|
|
#define __page_aligned __attribute__((__aligned__(PAGE_SIZE)))
|
|
#else
|
|
#define __page_aligned \
|
|
__attribute__((__aligned__(PAGE_SIZE), \
|
|
__section__(".data.page_aligned")))
|
|
#endif
|
|
|
|
|
|
/* This must match the -Ttext linker address */
|
|
/* Note: tophys & tovirt make assumptions about how */
|
|
/* KERNELBASE is defined for performance reasons. */
|
|
/* When KERNELBASE moves, those macros may have */
|
|
/* to change! */
|
|
#define PAGE_OFFSET ASM_CONST(0xC000000000000000)
|
|
#define KERNELBASE PAGE_OFFSET
|
|
#define VMALLOCBASE ASM_CONST(0xD000000000000000)
|
|
#define IOREGIONBASE ASM_CONST(0xE000000000000000)
|
|
|
|
#define IO_REGION_ID (IOREGIONBASE>>REGION_SHIFT)
|
|
#define VMALLOC_REGION_ID (VMALLOCBASE>>REGION_SHIFT)
|
|
#define KERNEL_REGION_ID (KERNELBASE>>REGION_SHIFT)
|
|
#define USER_REGION_ID (0UL)
|
|
#define REGION_ID(X) (((unsigned long)(X))>>REGION_SHIFT)
|
|
|
|
#define __bpn_to_ba(x) ((((unsigned long)(x))<<PAGE_SHIFT) + KERNELBASE)
|
|
#define __ba_to_bpn(x) ((((unsigned long)(x)) & ~REGION_MASK) >> PAGE_SHIFT)
|
|
|
|
#define __va(x) ((void *)((unsigned long)(x) + KERNELBASE))
|
|
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
#define page_to_pfn(page) discontigmem_page_to_pfn(page)
|
|
#define pfn_to_page(pfn) discontigmem_pfn_to_page(pfn)
|
|
#define pfn_valid(pfn) discontigmem_pfn_valid(pfn)
|
|
#else
|
|
#define pfn_to_page(pfn) (mem_map + (pfn))
|
|
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
|
|
#define pfn_valid(pfn) ((pfn) < max_mapnr)
|
|
#endif
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
/*
|
|
* Unfortunately the PLT is in the BSS in the PPC32 ELF ABI,
|
|
* and needs to be executable. This means the whole heap ends
|
|
* up being executable.
|
|
*/
|
|
#define VM_DATA_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#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.
|
|
*/
|
|
#define VM_STACK_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _PPC64_PAGE_H */
|