Release 4.14 arch/mips/include/asm/page.h
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#ifndef _ASM_PAGE_H
#define _ASM_PAGE_H
#include <spaces.h>
#include <linux/const.h>
#include <linux/kernel.h>
#include <asm/mipsregs.h>
/*
* PAGE_SHIFT determines the page size
*/
#ifdef CONFIG_PAGE_SIZE_4KB
#define PAGE_SHIFT 12
#endif
#ifdef CONFIG_PAGE_SIZE_8KB
#define PAGE_SHIFT 13
#endif
#ifdef CONFIG_PAGE_SIZE_16KB
#define PAGE_SHIFT 14
#endif
#ifdef CONFIG_PAGE_SIZE_32KB
#define PAGE_SHIFT 15
#endif
#ifdef CONFIG_PAGE_SIZE_64KB
#define PAGE_SHIFT 16
#endif
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
/*
* This is used for calculating the real page sizes
* for FTLB or VTLB + FTLB configurations.
*/
static inline unsigned int page_size_ftlb(unsigned int mmuextdef)
{
switch (mmuextdef) {
case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT:
if (PAGE_SIZE == (1 << 30))
return 5;
if (PAGE_SIZE == (1llu << 32))
return 6;
if (PAGE_SIZE > (256 << 10))
return 7; /* reserved */
/* fall through */
case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT:
return (PAGE_SHIFT - 10) / 2;
default:
panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n",
mmuextdef >> 14);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Leonid Yegoshin | 84 | 100.00% | 1 | 100.00% |
| Total | 84 | 100.00% | 1 | 100.00% |
#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
#define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
#else /* !CONFIG_MIPS_HUGE_TLB_SUPPORT */
#define HPAGE_SHIFT ({BUILD_BUG(); 0; })
#define HPAGE_SIZE ({BUILD_BUG(); 0; })
#define HPAGE_MASK ({BUILD_BUG(); 0; })
#define HUGETLB_PAGE_ORDER ({BUILD_BUG(); 0; })
#endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
#include <linux/pfn.h>
extern void build_clear_page(void);
extern void build_copy_page(void);
/*
* It's normally defined only for FLATMEM config but it's
* used in our early mem init code for all memory models.
* So always define it.
*/
#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
extern void clear_page(void * page);
extern void copy_page(void * to, void * from);
extern unsigned long shm_align_mask;
static inline unsigned long pages_do_alias(unsigned long addr1,
unsigned long addr2)
{
return (addr1 ^ addr2) & shm_align_mask;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ralf Bächle | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
struct page;
static inline void clear_user_page(void *addr, unsigned long vaddr,
struct page *page)
{
extern void (*flush_data_cache_page)(unsigned long addr);
clear_page(addr);
if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
flush_data_cache_page((unsigned long)addr);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ralf Bächle | 53 | 86.89% | 2 | 50.00% |
| Linus Torvalds (pre-git) | 5 | 8.20% | 1 | 25.00% |
| Andrew Morton | 3 | 4.92% | 1 | 25.00% |
| Total | 61 | 100.00% | 4 | 100.00% |
struct vm_area_struct;
extern void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
/*
* These are used to make use of C type-checking..
*/
#ifdef CONFIG_PHYS_ADDR_T_64BIT
#ifdef CONFIG_CPU_MIPS32
typedef struct { unsigned long pte_low, pte_high; } pte_t;
#define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
#define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
#else
typedef struct { unsigned long long pte; } pte_t;
#define pte_val(x) ((x).pte)
#define __pte(x) ((pte_t) { (x) } )
#endif
#else
typedef struct { unsigned long pte; } pte_t;
#define pte_val(x) ((x).pte)
#define __pte(x) ((pte_t) { (x) } )
#endif
typedef struct page *pgtable_t;
/*
* Right now we don't support 4-level pagetables, so all pud-related
* definitions come from <asm-generic/pgtable-nopud.h>.
*/
/*
* Finall the top of the hierarchy, the pgd
*/
typedef struct { unsigned long pgd; } pgd_t;
#define pgd_val(x) ((x).pgd)
#define __pgd(x) ((pgd_t) { (x) } )
/*
* Manipulate page protection bits
*/
typedef struct { unsigned long pgprot; } pgprot_t;
#define pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) } )
/*
* On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd
* pair of pages we only have a single global bit per pair of pages. When
* writing to the TLB make sure we always have the bit set for both pages
* or none. This macro is used to access the `buddy' of the pte we're just
* working on.
*/
#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
/*
* __pa()/__va() should be used only during mem init.
*/
static inline unsigned long ___pa(unsigned long x)
{
if (IS_ENABLED(CONFIG_64BIT)) {
/*
* For MIPS64 the virtual address may either be in one of
* the compatibility segements ckseg0 or ckseg1, or it may
* be in xkphys.
*/
return x < CKSEG0 ? XPHYSADDR(x) : CPHYSADDR(x);
}
if (!IS_ENABLED(CONFIG_EVA)) {
/*
* We're using the standard MIPS32 legacy memory map, ie.
* the address x is going to be in kseg0 or kseg1. We can
* handle either case by masking out the desired bits using
* CPHYSADDR.
*/
return CPHYSADDR(x);
}
/*
* EVA is in use so the memory map could be anything, making it not
* safe to just mask out bits.
*/
return x - PAGE_OFFSET + PHYS_OFFSET;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Paul Burton | 57 | 91.94% | 1 | 33.33% |
| Franck Bui-Huu | 3 | 4.84% | 1 | 33.33% |
| Masahiro Yamada | 2 | 3.23% | 1 | 33.33% |
| Total | 62 | 100.00% | 3 | 100.00% |
#define __pa(x) ___pa((unsigned long)(x))
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
#include <asm/io.h>
/*
* RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad
* (lmo) rsp. 8431fd094d625b94d364fe393076ccef88e6ce18 (kernel.org). The
* discussion can be found in lkml posting
* <a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com> which is
* archived at http://lists.linuxcoding.com/kernel/2006-q3/msg17360.html
*
* It is unclear if the misscompilations mentioned in
* http://lkml.org/lkml/2010/8/8/138 also affect MIPS so we keep this one
* until GCC 3.x has been retired before we can apply
* https://patchwork.linux-mips.org/patch/1541/
*/
#ifndef __pa_symbol
#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0))
#endif
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#ifdef CONFIG_FLATMEM
static inline int pfn_valid(unsigned long pfn)
{
/* avoid <linux/mm.h> include hell */
extern unsigned long max_mapnr;
unsigned long pfn_offset = ARCH_PFN_OFFSET;
return pfn >= pfn_offset && pfn < max_mapnr;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ralf Bächle | 32 | 100.00% | 3 | 100.00% |
| Total | 32 | 100.00% | 3 | 100.00% |
#elif defined(CONFIG_SPARSEMEM)
/* pfn_valid is defined in linux/mmzone.h */
#elif defined(CONFIG_NEED_MULTIPLE_NODES)
#define pfn_valid(pfn) \
({ \
unsigned long __pfn = (pfn); \
int __n = pfn_to_nid(__pfn); \
((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
NODE_DATA(__n)->node_spanned_pages) \
: 0); \
})
#endif
#define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys((void *) \
(kaddr))))
extern int __virt_addr_valid(const volatile void *kaddr);
#define virt_addr_valid(kaddr) \
__virt_addr_valid((const volatile void *) (kaddr))
#define VM_DATA_DEFAULT_FLAGS \
(VM_READ | VM_WRITE | \
((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#endif /* _ASM_PAGE_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ralf Bächle | 315 | 42.92% | 16 | 29.09% |
| Leonid Yegoshin | 97 | 13.22% | 3 | 5.45% |
| Linus Torvalds (pre-git) | 81 | 11.04% | 8 | 14.55% |
| Paul Burton | 60 | 8.17% | 2 | 3.64% |
| Andrew Morton | 43 | 5.86% | 3 | 5.45% |
| Atsushi Nemoto | 34 | 4.63% | 3 | 5.45% |
| Franck Bui-Huu | 26 | 3.54% | 5 | 9.09% |
| David Daney | 21 | 2.86% | 3 | 5.45% |
| Hillf Danton | 18 | 2.45% | 1 | 1.82% |
| Dmitri Vorobiev | 14 | 1.91% | 1 | 1.82% |
| Martin Schwidefsky | 6 | 0.82% | 1 | 1.82% |
| Nelson Elhage | 5 | 0.68% | 1 | 1.82% |
| Kamezawa Hiroyuki | 3 | 0.41% | 1 | 1.82% |
| David Mosberger-Tang | 3 | 0.41% | 1 | 1.82% |
| Masahiro Yamada | 2 | 0.27% | 1 | 1.82% |
| Stephen Rothwell | 2 | 0.27% | 1 | 1.82% |
| Arnd Bergmann | 1 | 0.14% | 1 | 1.82% |
| Geert Uytterhoeven | 1 | 0.14% | 1 | 1.82% |
| Zubair Lutfullah Kakakhel | 1 | 0.14% | 1 | 1.82% |
| Dan J Williams | 1 | 0.14% | 1 | 1.82% |
| Total | 734 | 100.00% | 55 | 100.00% |
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