mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-30 13:38:40 +00:00
fd4fd5aac1
Someone mentioned that almost all the architectures used basically the same implementation of get_order. This patch consolidates them into asm-generic/page.h and includes that in the appropriate places. The exceptions are ia64 and ppc which have their own (presumably optimised) versions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
163 lines
4.7 KiB
C
163 lines
4.7 KiB
C
/* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */
|
|
|
|
#ifndef _SPARC64_PAGE_H
|
|
#define _SPARC64_PAGE_H
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/const.h>
|
|
|
|
#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
|
|
#define PAGE_SHIFT 13
|
|
#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
|
|
#define PAGE_SHIFT 16
|
|
#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
|
|
#define PAGE_SHIFT 19
|
|
#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
|
|
#define PAGE_SHIFT 22
|
|
#else
|
|
#error No page size specified in kernel configuration
|
|
#endif
|
|
|
|
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
extern void _clear_page(void *page);
|
|
#define clear_page(X) _clear_page((void *)(X))
|
|
struct page;
|
|
extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
|
|
#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
|
|
extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
|
|
|
|
/* Unlike sparc32, sparc64's parameter passing API is more
|
|
* sane in that structures which as small enough are passed
|
|
* in registers instead of on the stack. Thus, setting
|
|
* STRICT_MM_TYPECHECKS does not generate worse code so
|
|
* let's enable it to get the type checking.
|
|
*/
|
|
|
|
#define STRICT_MM_TYPECHECKS
|
|
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
/* These are used to make use of C type-checking.. */
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long iopte; } iopte_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 iopte_val(x) ((x).iopte)
|
|
#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 __iopte(x) ((iopte_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 long iopte_t;
|
|
typedef unsigned int pmd_t;
|
|
typedef unsigned int pgd_t;
|
|
typedef unsigned long pgprot_t;
|
|
|
|
#define pte_val(x) (x)
|
|
#define iopte_val(x) (x)
|
|
#define pmd_val(x) (x)
|
|
#define pgd_val(x) (x)
|
|
#define pgprot_val(x) (x)
|
|
|
|
#define __pte(x) (x)
|
|
#define __iopte(x) (x)
|
|
#define __pmd(x) (x)
|
|
#define __pgd(x) (x)
|
|
#define __pgprot(x) (x)
|
|
|
|
#endif /* (STRICT_MM_TYPECHECKS) */
|
|
|
|
#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
|
|
#define HPAGE_SHIFT 22
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
|
|
#define HPAGE_SHIFT 19
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
|
|
#define HPAGE_SHIFT 16
|
|
#endif
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
#define ARCH_HAS_SETCLEAR_HUGE_PTE
|
|
#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
|
|
#endif
|
|
|
|
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
|
|
(_AC(0x0000000070000000,UL)) : (PAGE_OFFSET))
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
/* We used to stick this into a hard-coded global register (%g4)
|
|
* but that does not make sense anymore.
|
|
*/
|
|
#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
|
|
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
|
|
|
|
/* PFNs are real physical page numbers. However, mem_map only begins to record
|
|
* per-page information starting at pfn_base. This is to handle systems where
|
|
* the first physical page in the machine is at some huge physical address,
|
|
* such as 4GB. This is common on a partitioned E10000, for example.
|
|
*/
|
|
extern struct page *pfn_to_page(unsigned long pfn);
|
|
extern unsigned long page_to_pfn(struct page *);
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
|
|
|
|
#define pfn_valid(pfn) (((pfn)-(pfn_base)) < max_mapnr)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define virt_to_phys __pa
|
|
#define phys_to_virt __va
|
|
|
|
/* The following structure is used to hold the physical
|
|
* memory configuration of the machine. This is filled in
|
|
* probe_memory() and is later used by mem_init() to set up
|
|
* mem_map[]. We statically allocate SPARC_PHYS_BANKS of
|
|
* these structs, this is arbitrary. The entry after the
|
|
* last valid one has num_bytes==0.
|
|
*/
|
|
|
|
struct sparc_phys_banks {
|
|
unsigned long base_addr;
|
|
unsigned long num_bytes;
|
|
};
|
|
|
|
#define SPARC_PHYS_BANKS 32
|
|
|
|
extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
|
|
|
|
#endif /* !(__ASSEMBLY__) */
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#endif /* !(__KERNEL__) */
|
|
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* !(_SPARC64_PAGE_H) */
|